1. Background information
The MIPS architecture, as originally designed and implemented in
mid-1980s has a uniform instruction word size that is 4 bytes, naturally
aligned. As such all MIPS instructions are located at addresses that
have their bits #1 and #0 set to zeroes, and any attempt to execute an
instruction from an address that has any of the two bits set to one
causes an address error exception. This may for example happen when a
jump-register instruction is executed whose register value used as the
jump target has any of these bits set.
Then in mid 1990s LSI sought a way to improve code density for their
TinyRISC family of MIPS cores and invented an alternatively encoded
instruction set in a joint effort with MIPS Technologies (then a
subsidiary of SGI). The new instruction set has been named the MIPS16
ASE (Application-Specific Extension) and uses a variable instruction
word size, which is 2 bytes (as the name of the ASE suggests) for most,
but there are a couple of exceptions that take 4 bytes, and then most of
the 2-byte instructions can be treated with a 2-byte extension prefix to
expand the range of the immediate operands used.
As a result instructions are no longer 4-byte aligned, instead they are
aligned to a multiple of 2. That left the bit #0 still unused for code
references, be it for the standard MIPS (i.e. as originally invented) or
for the MIPS16 instruction set, and based on that observation a clever
trick was invented that on one hand allowed the processor to be
seamlessly switched between the two instruction sets at any time at the
run time while on the other avoided the introduction of any special
control register to do that.
So it is the bit #0 of the instruction address that was chosen as the
selector and named the ISA bit. Any instruction executed at an even
address is interpreted as a standard MIPS instruction (the address still
has to have its bit #1 clear), any instruction executed at an odd
address is interpreted as a MIPS16 instruction.
To switch between modes ordinary jump instructions are used, such as
used for function calls and returns, specifically the bit #0 of the
source register used in jump-register instructions selects the execution
(ISA) mode for the following piece of code to be interpreted in.
Additionally new jump-immediate instructions were added that flipped the
ISA bit to select the opposite mode upon execution. They were
considered necessary to avoid the need to make register jumps in all
cases as the original jump-immediate instructions provided no way to
change the bit #0 at all.
This was all important for cases where standard MIPS and MIPS16 code had
to be mixed, either for compatibility with the existing binary code base
or to access resources not reachable from MIPS16 code (the MIPS16
instruction set only provides access to general-purpose registers, and
not for example floating-point unit registers or privileged coprocessor
0 registers) -- pieces of code in the opposite mode can be executed as
ordinary subroutine calls.
A similar approach has been more recently adopted for the MIPS16
replacement instruction set defined as the so called microMIPS ASE.
This is another instruction set encoding introduced to the MIPS
architecture. Just like the MIPS16 ASE, the microMIPS instruction set
uses a variable-length encoding, where each instruction takes a multiple
of 2 bytes. The ISA bit has been reused and for microMIPS-capable
processors selects between the standard MIPS and the microMIPS mode
instead.
2. Statement of the problem
To put it shortly, MIPS16 and microMIPS code pointers used by GDB are
different to these observed at the run time. This results in the same
expressions being evaluated producing different results in GDB and in
the program being debugged. Obviously it's the results obtained at the
run time that are correct (they define how the program behaves) and
therefore by definition the results obtained in GDB are incorrect.
A bit longer description will record that obviously at the run time the
ISA bit has to be set correctly (refer to background information above
if unsure why so) or the program will not run as expected. This is
recorded in all the executable file structures used at the run time: the
dynamic symbol table (but not always the static one!), the GOT, and
obviously in all the addresses embedded in code or data of the program
itself, calculated by applying the appropriate relocations at the static
link time.
While a program is being processed by GDB, the ISA bit is stripped off
from any code addresses, presumably to make them the same as the
respective raw memory byte address used by the processor to access the
instruction in the instruction fetch access cycle. This stripping is
actually performed outside GDB proper, in BFD, specifically
_bfd_mips_elf_symbol_processing (elfxx-mips.c, see the piece of code at
the very bottom of that function, starting with an: "If this is an
odd-valued function symbol, assume it's a MIPS16 or microMIPS one."
comment).
This function is also responsible for symbol table dumps made by
`objdump' too, so you'll never see the ISA bit reported there by that
tool, you need to use `readelf'.
This is however unlike what is ever done at the run time, the ISA bit
once present is never stripped off, for example a cast like this:
(short *) main
will not strip the ISA bit off and if the resulting pointer is intended
to be used to access instructions as data, for example for software
instruction decoding (like for fault recovery or emulation in a signal
handler) or for self-modifying code then the bit still has to be
stripped off by an explicit AND operation.
This is probably best illustrated with a simple real program example.
Let's consider the following simple program:
$ cat foobar.c
int __attribute__ ((mips16)) foo (void)
{
return 1;
}
int __attribute__ ((mips16)) bar (void)
{
return 2;
}
int __attribute__ ((nomips16)) foo32 (void)
{
return 3;
}
int (*foo32p) (void) = foo32;
int (*foop) (void) = foo;
int fooi = (int) foo;
int
main (void)
{
return foop ();
}
$
This is plain C with no odd tricks, except from the instruction mode
attributes. They are not necessary to trigger this problem, I just put
them here so that the program can be contained in a single source file
and to make it obvious which function is MIPS16 code and which is not.
Let's try it with Linux, so that everyone can repeat this experiment:
$ mips-linux-gnu-gcc -mips16 -g -O2 -o foobar foobar.c
$
Let's have a look at some interesting symbols:
$ mips-linux-gnu-readelf -s foobar | egrep 'table|foo|bar'
Symbol table '.dynsym' contains 7 entries:
Symbol table '.symtab' contains 95 entries:
55: 00000000 0 FILE LOCAL DEFAULT ABS foobar.c
66: 0040068c 4 FUNC GLOBAL DEFAULT [MIPS16] 12 bar
68: 00410848 4 OBJECT GLOBAL DEFAULT 21 foo32p
70: 00410844 4 OBJECT GLOBAL DEFAULT 21 foop
78: 00400684 8 FUNC GLOBAL DEFAULT 12 foo32
80: 00400680 4 FUNC GLOBAL DEFAULT [MIPS16] 12 foo
88: 00410840 4 OBJECT GLOBAL DEFAULT 21 fooi
$
Hmm, no sight of the ISA bit, but notice how foo and bar (but not
foo32!) have been marked as MIPS16 functions (ELF symbol structure's
`st_other' field is used for that).
So let's try to run and poke at this program with GDB. I'll be using a
native system for simplicity (I'll be using ellipses here and there to
remove unrelated clutter):
$ ./foobar
$ echo $?
1
$
So far, so good.
$ gdb ./foobar
[...]
(gdb) break main
Breakpoint 1 at 0x400490: file foobar.c, line 23.
(gdb) run
Starting program: .../foobar
Breakpoint 1, main () at foobar.c:23
23 return foop ();
(gdb)
Yay, it worked! OK, so let's poke at it:
(gdb) print main
$1 = {int (void)} 0x400490 <main>
(gdb) print foo32
$2 = {int (void)} 0x400684 <foo32>
(gdb) print foo32p
$3 = (int (*)(void)) 0x400684 <foo32>
(gdb) print bar
$4 = {int (void)} 0x40068c <bar>
(gdb) print foo
$5 = {int (void)} 0x400680 <foo>
(gdb) print foop
$6 = (int (*)(void)) 0x400681 <foo>
(gdb)
A-ha! Here's the difference and finally the ISA bit!
(gdb) print /x fooi
$7 = 0x400681
(gdb) p/x $pc
p/x $pc
$8 = 0x400491
(gdb)
And here as well...
(gdb) advance foo
foo () at foobar.c:4
4 }
(gdb) disassemble
Dump of assembler code for function foo:
0x00400680 <+0>: jr ra
0x00400682 <+2>: li v0,1
End of assembler dump.
(gdb) finish
Run till exit from #0 foo () at foobar.c:4
main () at foobar.c:24
24 }
Value returned is $9 = 1
(gdb) continue
Continuing.
[Inferior 1 (process 14103) exited with code 01]
(gdb)
So let's be a bit inquisitive...
(gdb) run
Starting program: .../foobar
Breakpoint 1, main () at foobar.c:23
23 return foop ();
(gdb)
Actually we do not like to run foo here at all. Let's run bar instead!
(gdb) set foop = bar
(gdb) print foop
$10 = (int (*)(void)) 0x40068c <bar>
(gdb)
Hmm, no ISA bit. Is it going to work?
(gdb) advance bar
bar () at foobar.c:9
9 }
(gdb) p/x $pc
$11 = 0x40068c
(gdb) disassemble
Dump of assembler code for function bar:
=> 0x0040068c <+0>: jr ra
0x0040068e <+2>: li v0,2
End of assembler dump.
(gdb) finish
Run till exit from #0 bar () at foobar.c:9
Program received signal SIGILL, Illegal instruction.
bar () at foobar.c:9
9 }
(gdb)
Oops!
(gdb) p/x $pc
$12 = 0x40068c
(gdb)
We're still there!
(gdb) continue
Continuing.
Program terminated with signal SIGILL, Illegal instruction.
The program no longer exists.
(gdb)
So let's try something else:
(gdb) run
Starting program: .../foobar
Breakpoint 1, main () at foobar.c:23
23 return foop ();
(gdb) set foop = foo
(gdb) advance foo
foo () at foobar.c:4
4 }
(gdb) disassemble
Dump of assembler code for function foo:
=> 0x00400680 <+0>: jr ra
0x00400682 <+2>: li v0,1
End of assembler dump.
(gdb) finish
Run till exit from #0 foo () at foobar.c:4
Program received signal SIGILL, Illegal instruction.
foo () at foobar.c:4
4 }
(gdb) continue
Continuing.
Program terminated with signal SIGILL, Illegal instruction.
The program no longer exists.
(gdb)
The same problem!
(gdb) run
Starting program:
/net/build2-lucid-cs/scratch/macro/mips-linux-fsf-gcc/isa-bit/foobar
Breakpoint 1, main () at foobar.c:23
23 return foop ();
(gdb) set foop = foo32
(gdb) advance foo32
foo32 () at foobar.c:14
14 }
(gdb) disassemble
Dump of assembler code for function foo32:
=> 0x00400684 <+0>: jr ra
0x00400688 <+4>: li v0,3
End of assembler dump.
(gdb) finish
Run till exit from #0 foo32 () at foobar.c:14
main () at foobar.c:24
24 }
Value returned is $14 = 3
(gdb) continue
Continuing.
[Inferior 1 (process 14113) exited with code 03]
(gdb)
That did work though, so it's the ISA bit only!
(gdb) quit
Enough!
That's the tip of the iceberg only though. So let's rebuild the
executable with some dynamic symbols:
$ mips-linux-gnu-gcc -mips16 -Wl,--export-dynamic -g -O2 -o foobar-dyn foobar.c
$ mips-linux-gnu-readelf -s foobar-dyn | egrep 'table|foo|bar'
Symbol table '.dynsym' contains 32 entries:
6: 004009cd 4 FUNC GLOBAL DEFAULT 12 bar
8: 00410b88 4 OBJECT GLOBAL DEFAULT 21 foo32p
9: 00410b84 4 OBJECT GLOBAL DEFAULT 21 foop
15: 004009c4 8 FUNC GLOBAL DEFAULT 12 foo32
17: 004009c1 4 FUNC GLOBAL DEFAULT 12 foo
25: 00410b80 4 OBJECT GLOBAL DEFAULT 21 fooi
Symbol table '.symtab' contains 95 entries:
55: 00000000 0 FILE LOCAL DEFAULT ABS foobar.c
69: 004009cd 4 FUNC GLOBAL DEFAULT 12 bar
71: 00410b88 4 OBJECT GLOBAL DEFAULT 21 foo32p
72: 00410b84 4 OBJECT GLOBAL DEFAULT 21 foop
79: 004009c4 8 FUNC GLOBAL DEFAULT 12 foo32
81: 004009c1 4 FUNC GLOBAL DEFAULT 12 foo
89: 00410b80 4 OBJECT GLOBAL DEFAULT 21 fooi
$
OK, now the ISA bit is there for a change, but the MIPS16 `st_other'
attribute gone, hmm... What does `objdump' do then:
$ mips-linux-gnu-objdump -Tt foobar-dyn | egrep 'SYMBOL|foo|bar'
foobar-dyn: file format elf32-tradbigmips
SYMBOL TABLE:
00000000 l df *ABS* 00000000 foobar.c
004009cc g F .text 00000004 0xf0 bar
00410b88 g O .data 00000004 foo32p
00410b84 g O .data 00000004 foop
004009c4 g F .text 00000008 foo32
004009c0 g F .text 00000004 0xf0 foo
00410b80 g O .data 00000004 fooi
DYNAMIC SYMBOL TABLE:
004009cc g DF .text 00000004 Base 0xf0 bar
00410b88 g DO .data 00000004 Base foo32p
00410b84 g DO .data 00000004 Base foop
004009c4 g DF .text 00000008 Base foo32
004009c0 g DF .text 00000004 Base 0xf0 foo
00410b80 g DO .data 00000004 Base fooi
$
Hmm, the attribute (0xf0, printed raw) is back, and the ISA bit gone
again.
Let's have a look at some DWARF-2 records GDB uses (I'll be stripping
off a lot here for brevity) -- debug info:
$ mips-linux-gnu-readelf -wi foobar
Contents of the .debug_info section:
[...]
Compilation Unit @ offset 0x88:
Length: 0xbb (32-bit)
Version: 4
Abbrev Offset: 62
Pointer Size: 4
<0><93>: Abbrev Number: 1 (DW_TAG_compile_unit)
<94> DW_AT_producer : (indirect string, offset: 0x19e): GNU C 4.8.0 20120513 (experimental) -meb -mips16 -march=mips32r2 -mhard-float -mllsc -mplt -mno-synci -mno-shared -mabi=32 -g -O2
<98> DW_AT_language : 1 (ANSI C)
<99> DW_AT_name : (indirect string, offset: 0x190): foobar.c
<9d> DW_AT_comp_dir : (indirect string, offset: 0x225): [...]
<a1> DW_AT_ranges : 0x0
<a5> DW_AT_low_pc : 0x0
<a9> DW_AT_stmt_list : 0x27
<1><ad>: Abbrev Number: 2 (DW_TAG_subprogram)
<ae> DW_AT_external : 1
<ae> DW_AT_name : foo
<b2> DW_AT_decl_file : 1
<b3> DW_AT_decl_line : 1
<b4> DW_AT_prototyped : 1
<b4> DW_AT_type : <0xc2>
<b8> DW_AT_low_pc : 0x400680
<bc> DW_AT_high_pc : 0x400684
<c0> DW_AT_frame_base : 1 byte block: 9c (DW_OP_call_frame_cfa)
<c2> DW_AT_GNU_all_call_sites: 1
<1><c2>: Abbrev Number: 3 (DW_TAG_base_type)
<c3> DW_AT_byte_size : 4
<c4> DW_AT_encoding : 5 (signed)
<c5> DW_AT_name : int
<1><c9>: Abbrev Number: 4 (DW_TAG_subprogram)
<ca> DW_AT_external : 1
<ca> DW_AT_name : (indirect string, offset: 0x18a): foo32
<ce> DW_AT_decl_file : 1
<cf> DW_AT_decl_line : 11
<d0> DW_AT_prototyped : 1
<d0> DW_AT_type : <0xc2>
<d4> DW_AT_low_pc : 0x400684
<d8> DW_AT_high_pc : 0x40068c
<dc> DW_AT_frame_base : 1 byte block: 9c (DW_OP_call_frame_cfa)
<de> DW_AT_GNU_all_call_sites: 1
<1><de>: Abbrev Number: 2 (DW_TAG_subprogram)
<df> DW_AT_external : 1
<df> DW_AT_name : bar
<e3> DW_AT_decl_file : 1
<e4> DW_AT_decl_line : 6
<e5> DW_AT_prototyped : 1
<e5> DW_AT_type : <0xc2>
<e9> DW_AT_low_pc : 0x40068c
<ed> DW_AT_high_pc : 0x400690
<f1> DW_AT_frame_base : 1 byte block: 9c (DW_OP_call_frame_cfa)
<f3> DW_AT_GNU_all_call_sites: 1
<1><f3>: Abbrev Number: 5 (DW_TAG_subprogram)
<f4> DW_AT_external : 1
<f4> DW_AT_name : (indirect string, offset: 0x199): main
<f8> DW_AT_decl_file : 1
<f9> DW_AT_decl_line : 21
<fa> DW_AT_prototyped : 1
<fa> DW_AT_type : <0xc2>
<fe> DW_AT_low_pc : 0x400490
<102> DW_AT_high_pc : 0x4004a4
<106> DW_AT_frame_base : 1 byte block: 9c (DW_OP_call_frame_cfa)
<108> DW_AT_GNU_all_tail_call_sites: 1
[...]
$
-- no sign of the ISA bit anywhere -- frame info:
$ mips-linux-gnu-readelf -wf foobar
[...]
Contents of the .debug_frame section:
00000000 0000000c ffffffff CIE
Version: 1
Augmentation: ""
Code alignment factor: 1
Data alignment factor: -4
Return address column: 31
DW_CFA_def_cfa_register: r29
DW_CFA_nop
00000010 0000000c 00000000 FDE cie=00000000 pc=00400680..00400684
00000020 0000000c 00000000 FDE cie=00000000 pc=00400684..0040068c
00000030 0000000c 00000000 FDE cie=00000000 pc=0040068c..00400690
00000040 00000018 00000000 FDE cie=00000000 pc=00400490..004004a4
DW_CFA_advance_loc: 6 to 00400496
DW_CFA_def_cfa_offset: 32
DW_CFA_offset: r31 at cfa-4
DW_CFA_advance_loc: 6 to 0040049c
DW_CFA_restore: r31
DW_CFA_def_cfa_offset: 0
DW_CFA_nop
DW_CFA_nop
DW_CFA_nop
[...]
$
-- no sign of the ISA bit anywhere -- range info (GDB doesn't use arange):
$ mips-linux-gnu-readelf -wR foobar
Contents of the .debug_ranges section:
Offset Begin End
00000000 00400680 00400690
00000000 00400490 004004a4
00000000 <End of list>
$
-- no sign of the ISA bit anywhere -- line info:
$ mips-linux-gnu-readelf -wl foobar
Raw dump of debug contents of section .debug_line:
[...]
Offset: 0x27
Length: 78
DWARF Version: 2
Prologue Length: 31
Minimum Instruction Length: 1
Initial value of 'is_stmt': 1
Line Base: -5
Line Range: 14
Opcode Base: 13
Opcodes:
Opcode 1 has 0 args
Opcode 2 has 1 args
Opcode 3 has 1 args
Opcode 4 has 1 args
Opcode 5 has 1 args
Opcode 6 has 0 args
Opcode 7 has 0 args
Opcode 8 has 0 args
Opcode 9 has 1 args
Opcode 10 has 0 args
Opcode 11 has 0 args
Opcode 12 has 1 args
The Directory Table is empty.
The File Name Table:
Entry Dir Time Size Name
1 0 0 0 foobar.c
Line Number Statements:
Extended opcode 2: set Address to 0x400681
Special opcode 6: advance Address by 0 to 0x400681 and Line by 1 to 2
Special opcode 7: advance Address by 0 to 0x400681 and Line by 2 to 4
Special opcode 55: advance Address by 3 to 0x400684 and Line by 8 to 12
Special opcode 7: advance Address by 0 to 0x400684 and Line by 2 to 14
Advance Line by -7 to 7
Special opcode 131: advance Address by 9 to 0x40068d and Line by 0 to 7
Special opcode 7: advance Address by 0 to 0x40068d and Line by 2 to 9
Advance PC by 3 to 0x400690
Extended opcode 1: End of Sequence
Extended opcode 2: set Address to 0x400491
Advance Line by 21 to 22
Copy
Special opcode 6: advance Address by 0 to 0x400491 and Line by 1 to 23
Special opcode 60: advance Address by 4 to 0x400495 and Line by -1 to 22
Special opcode 34: advance Address by 2 to 0x400497 and Line by 1 to 23
Special opcode 62: advance Address by 4 to 0x40049b and Line by 1 to 24
Special opcode 32: advance Address by 2 to 0x40049d and Line by -1 to 23
Special opcode 6: advance Address by 0 to 0x40049d and Line by 1 to 24
Advance PC by 7 to 0x4004a4
Extended opcode 1: End of Sequence
[...]
-- a-ha, the ISA bit is there! However it's not always right for some
reason, I don't have a small test case to show it, but here's an excerpt
from MIPS16 libc, a prologue of a function:
00019630 <__libc_init_first>:
19630: e8a0 jrc ra
19632: 6500 nop
00019634 <_init>:
19634: f000 6a11 li v0,17
19638: f7d8 0b08 la v1,15e00 <_DYNAMIC+0x15c54>
1963c: f400 3240 sll v0,16
19640: e269 addu v0,v1
19642: 659a move gp,v0
19644: 64f6 save 48,ra,s0-s1
19646: 671c move s0,gp
19648: d204 sw v0,16(sp)
1964a: f352 984c lw v0,-27828(s0)
1964e: 6724 move s1,a0
and the corresponding DWARF-2 line info:
Line Number Statements:
Extended opcode 2: set Address to 0x19631
Advance Line by 44 to 45
Copy
Special opcode 8: advance Address by 0 to 0x19631 and Line by 3 to 48
Special opcode 66: advance Address by 4 to 0x19635 and Line by 5 to 53
Advance PC by constant 17 to 0x19646
Special opcode 25: advance Address by 1 to 0x19647 and Line by 6 to 59
Advance Line by -6 to 53
Special opcode 33: advance Address by 2 to 0x19649 and Line by 0 to 53
Special opcode 39: advance Address by 2 to 0x1964b and Line by 6 to 59
Advance Line by -6 to 53
Special opcode 61: advance Address by 4 to 0x1964f and Line by 0 to 53
-- see that "Advance PC by constant 17" there? It clears the ISA bit,
however code at 0x19646 is not standard MIPS code at all. For some
reason the constant is always 17, I've never seen DW_LNS_const_add_pc
used with any other value -- is that a binutils bug or what?
3. Solution:
I think we should retain the value of the ISA bit in code references,
that is effectively treat them as cookies as they indeed are (although
trivially calculated) rather than raw memory byte addresses.
In a perfect world both the static symbol table and the respective
DWARF-2 records should be fixed to include the ISA bit in all the cases.
I think however that this is infeasible.
All the uses of `_bfd_mips_elf_symbol_processing' can not necessarily be
tracked down. This function is used by `elf_slurp_symbol_table' that in
turn is used by `bfd_canonicalize_symtab' and
`bfd_canonicalize_dynamic_symtab', which are public interfaces.
Similarly DWARF-2 records are used outside GDB, one notable if a bit
questionable is the exception unwinder (libgcc/unwind-dw2.c) -- I have
identified at least bits in `execute_cfa_program' and
`uw_frame_state_for', both around the calls to `_Unwind_IsSignalFrame',
that would need an update as they effectively flip the ISA bit freely;
see also the comment about MASK_RETURN_ADDR in gcc/config/mips/mips.h.
But there may be more places. Any change in how DWARF-2 records are
produced would require an update there and would cause compatibility
problems with libgcc.a binaries already distributed; given that this is
a static library a complex change involving function renames would
likely be required.
I propose therefore to accept the existing inconsistencies and deal with
them entirely within GDB. I have figured out that the ISA bit lost in
various places can still be recovered as long as we have symbol
information -- that'll have the `st_other' attribute correctly set to
one of standard MIPS/MIPS16/microMIPS encoding.
Here's the resulting change. It adds a couple of new `gdbarch' hooks,
one to update symbol information with the ISA bit lost in
`_bfd_mips_elf_symbol_processing', and two other ones to adjust DWARF-2
records as they're processed. The ISA bit is set in each address
handled according to information retrieved from the symbol table for the
symbol spanning the address if any; limits are adjusted based on the
address they point to related to the respective base address.
Additionally minimal symbol information has to be adjusted accordingly
in its gdbarch hook.
With these changes in place some complications with ISA bit juggling in
the PC that never fully worked can be removed from the MIPS backend.
Conversely, the generic dynamic linker event special breakpoint symbol
handler has to be updated to call the minimal symbol gdbarch hook to
record that the symbol is a MIPS16 or microMIPS address if applicable or
the breakpoint will be set at the wrong address and either fail to work
or cause SIGTRAPs (this is because the symbol is handled early on and
bypasses regular symbol processing).
4. Results obtained
The change fixes the example above -- to repeat only the crucial steps:
(gdb) break main
Breakpoint 1 at 0x400491: file foobar.c, line 23.
(gdb) run
Starting program: .../foobar
Breakpoint 1, main () at foobar.c:23
23 return foop ();
(gdb) print foo
$1 = {int (void)} 0x400681 <foo>
(gdb) set foop = bar
(gdb) advance bar
bar () at foobar.c:9
9 }
(gdb) disassemble
Dump of assembler code for function bar:
=> 0x0040068d <+0>: jr ra
0x0040068f <+2>: li v0,2
End of assembler dump.
(gdb) finish
Run till exit from #0 bar () at foobar.c:9
main () at foobar.c:24
24 }
Value returned is $2 = 2
(gdb) continue
Continuing.
[Inferior 1 (process 14128) exited with code 02]
(gdb)
-- excellent!
The change removes about 90 failures per MIPS16 multilib in mips-sde-elf
testing too, results for MIPS16 are now similar to that for standard
MIPS; microMIPS results are a bit worse because of host-I/O problems in
QEMU used instead of MIPSsim for microMIPS testing only:
=== gdb Summary ===
# of expected passes 14299
# of unexpected failures 187
# of expected failures 56
# of known failures 58
# of unresolved testcases 11
# of untested testcases 52
# of unsupported tests 174
MIPS16:
=== gdb Summary ===
# of expected passes 14298
# of unexpected failures 187
# of unexpected successes 2
# of expected failures 54
# of known failures 58
# of unresolved testcases 12
# of untested testcases 52
# of unsupported tests 174
microMIPS:
=== gdb Summary ===
# of expected passes 14149
# of unexpected failures 201
# of unexpected successes 2
# of expected failures 54
# of known failures 58
# of unresolved testcases 7
# of untested testcases 53
# of unsupported tests 175
2014-12-12 Maciej W. Rozycki <macro@codesourcery.com>
Maciej W. Rozycki <macro@mips.com>
Pedro Alves <pedro@codesourcery.com>
gdb/
* gdbarch.sh (elf_make_msymbol_special): Change type to `F',
remove `predefault' and `invalid_p' initializers.
(make_symbol_special): New architecture method.
(adjust_dwarf2_addr, adjust_dwarf2_line): Likewise.
(objfile, symbol): New declarations.
* arch-utils.h (default_elf_make_msymbol_special): Remove
prototype.
(default_make_symbol_special): New prototype.
(default_adjust_dwarf2_addr): Likewise.
(default_adjust_dwarf2_line): Likewise.
* mips-tdep.h (mips_unmake_compact_addr): New prototype.
* arch-utils.c (default_elf_make_msymbol_special): Remove
function.
(default_make_symbol_special): New function.
(default_adjust_dwarf2_addr): Likewise.
(default_adjust_dwarf2_line): Likewise.
* dwarf2-frame.c (decode_frame_entry_1): Call
`gdbarch_adjust_dwarf2_addr'.
* dwarf2loc.c (dwarf2_find_location_expression): Likewise.
* dwarf2read.c (create_addrmap_from_index): Likewise.
(process_psymtab_comp_unit_reader): Likewise.
(add_partial_symbol): Likewise.
(add_partial_subprogram): Likewise.
(process_full_comp_unit): Likewise.
(read_file_scope): Likewise.
(read_func_scope): Likewise. Call `gdbarch_make_symbol_special'.
(read_lexical_block_scope): Call `gdbarch_adjust_dwarf2_addr'.
(read_call_site_scope): Likewise.
(dwarf2_ranges_read): Likewise.
(dwarf2_record_block_ranges): Likewise.
(read_attribute_value): Likewise.
(dwarf_decode_lines_1): Call `gdbarch_adjust_dwarf2_line'.
(new_symbol_full): Call `gdbarch_adjust_dwarf2_addr'.
* elfread.c (elf_symtab_read): Don't call
`gdbarch_elf_make_msymbol_special' if unset.
* mips-linux-tdep.c (micromips_linux_sigframe_validate): Strip
the ISA bit from the PC.
* mips-tdep.c (mips_unmake_compact_addr): New function.
(mips_elf_make_msymbol_special): Set the ISA bit in the symbol's
address appropriately.
(mips_make_symbol_special): New function.
(mips_pc_is_mips): Set the ISA bit before symbol lookup.
(mips_pc_is_mips16): Likewise.
(mips_pc_is_micromips): Likewise.
(mips_pc_isa): Likewise.
(mips_adjust_dwarf2_addr): New function.
(mips_adjust_dwarf2_line): Likewise.
(mips_read_pc, mips_unwind_pc): Keep the ISA bit.
(mips_addr_bits_remove): Likewise.
(mips_skip_trampoline_code): Likewise.
(mips_write_pc): Don't set the ISA bit.
(mips_eabi_push_dummy_call): Likewise.
(mips_o64_push_dummy_call): Likewise.
(mips_gdbarch_init): Install `mips_make_symbol_special',
`mips_adjust_dwarf2_addr' and `mips_adjust_dwarf2_line' gdbarch
handlers.
* solib.c (gdb_bfd_lookup_symbol_from_symtab): Get
target-specific symbol address adjustments.
* gdbarch.h: Regenerate.
* gdbarch.c: Regenerate.
2014-12-12 Maciej W. Rozycki <macro@codesourcery.com>
gdb/testsuite/
* gdb.base/func-ptrs.c: New file.
* gdb.base/func-ptrs.exp: New file.
This patch intends to partially fix PR breakpoints/10737, which is
about making the syscall information (for the "catch syscall" command)
be per-arch, instead of global. This is not a full fix because of the
other issues pointed by Pedro here:
<https://sourceware.org/bugzilla/show_bug.cgi?id=10737#c5>
However, I consider it a good step towards the real fix. It will also
help me fix <https://sourceware.org/bugzilla/show_bug.cgi?id=17402>.
What this patch does, basically, is move the "syscalls_info"
struct to gdbarch. Currently, the syscall information is stored in a
global variable inside gdb/xml-syscall.c, which means that there is no
easy way to correlate this info with the current target or
architecture being used, for example. This causes strange behaviors,
because the syscall info is not re-read when the arch changes. For
example, if you put a syscall catchpoint in syscall 5 on i386 (syscall
open), and then load a x86_64 program on GDB and put the same syscall
5 there (fstat on x86_64), you will still see that GDB tells you that
it is catching "open", even though it is not. With this patch, GDB
correctly says that it will be catching fstat syscalls.
(gdb) set architecture i386
The target architecture is assumed to be i386
(gdb) catch syscall 5
Catchpoint 1 (syscall 'open' [5])
(gdb) set architecture i386:x86-64
The target architecture is assumed to be i386:x86-64
(gdb) catch syscall 5
Catchpoint 2 (syscall 'open' [5])
But with the patch:
(gdb) set architecture i386
The target architecture is assumed to be i386
(gdb) catch syscall 5
Catchpoint 1 (syscall 'open' [5])
(gdb) set architecture i386:x86-64
The target architecture is assumed to be i386:x86-64
(gdb) catch syscall 5
Catchpoint 2 (syscall 'fstat' [5])
As I said, there are still some problems on the "catch syscall"
mechanism, because (for example) the user should be able to "catch
syscall open" on i386, and then expect "open" to be caught also on
x86_64. Currently, it doesn't work. I intend to work on this later.
gdb/
2014-11-20 Sergio Durigan Junior <sergiodj@redhat.com>
PR breakpoints/10737
* amd64-linux-tdep.c (amd64_linux_init_abi_common): Adjust call to
set_xml_syscall_file_name to provide gdbarch.
* arm-linux-tdep.c (arm_linux_init_abi): Likewise.
* bfin-linux-tdep.c (bfin_linux_init_abi): Likewise.
* breakpoint.c (print_it_catch_syscall): Adjust call to
get_syscall_by_number to provide gdbarch.
(print_one_catch_syscall): Likewise.
(print_mention_catch_syscall): Likewise.
(print_recreate_catch_syscall): Likewise.
(catch_syscall_split_args): Adjust calls to get_syscall_by_number
and get_syscall_by_name to provide gdbarch.
(catch_syscall_completer): Adjust call to get_syscall_names to
provide gdbarch.
* gdbarch.c: Regenerate.
* gdbarch.h: Likewise.
* gdbarch.sh: Forward declare "struct syscalls_info".
(xml_syscall_file): New variable.
(syscalls_info): Likewise.
* i386-linux-tdep.c (i386_linux_init_abi): Adjust call to
set_xml_syscall_file_name to provide gdbarch.
* mips-linux-tdep.c (mips_linux_init_abi): Likewise.
* ppc-linux-tdep.c (ppc_linux_init_abi): Likewise.
* s390-linux-tdep.c (s390_gdbarch_init): Likewise.
* sparc-linux-tdep.c (sparc32_linux_init_abi): Likewise.
* sparc64-linux-tdep.c (sparc64_linux_init_abi): Likewise.
* xml-syscall.c: Include gdbarch.h.
(set_xml_syscall_file_name): Accept gdbarch parameter.
(get_syscall_by_number): Likewise.
(get_syscall_by_name): Likewise.
(get_syscall_names): Likewise.
(my_gdb_datadir): Delete global variable.
(struct syscalls_info) <my_gdb_datadir>: New variable.
(struct syscalls_info) <sysinfo>: Rename variable to
"syscalls_info".
(sysinfo): Delete global variable.
(have_initialized_sysinfo): Likewise.
(xml_syscall_file): Likewise.
(sysinfo_free_syscalls_desc): Rename to...
(syscalls_info_free_syscalls_desc): ... this.
(free_syscalls_info): Rename "sysinfo" to "syscalls_info". Adjust
code to the new layout of "struct syscalls_info".
(make_cleanup_free_syscalls_info): Rename parameter "sysinfo" to
"syscalls_info".
(syscall_create_syscall_desc): Likewise.
(syscall_start_syscall): Likewise.
(syscall_parse_xml): Likewise.
(xml_init_syscalls_info): Likewise. Drop "const" from return value.
(init_sysinfo): Rename to...
(init_syscalls_info): ...this. Add gdbarch as a parameter.
Adjust function to deal with gdbarch.
(xml_get_syscall_number): Delete parameter sysinfo. Accept
gdbarch as a parameter. Adjust code.
(xml_get_syscall_name): Likewise.
(xml_list_of_syscalls): Likewise.
(set_xml_syscall_file_name): Accept gdbarch as parameter.
(get_syscall_by_number): Likewise.
(get_syscall_by_name): Likewise.
(get_syscall_names): Likewise.
* xml-syscall.h (set_xml_syscall_file_name): Likewise.
(get_syscall_by_number): Likewise.
(get_syscall_by_name): Likewise.
(get_syscall_names): Likewise.
gdb/testsuite/
2014-11-20 Sergio Durigan Junior <sergiodj@redhat.com>
PR breakpoints/10737
* gdb.base/catch-syscall.exp (do_syscall_tests): Call
test_catch_syscall_multi_arch.
(test_catch_syscall_multi_arch): New function.
breakpoint.c uses gdbarch_breakpoint_from_pc to determine whether a
breakpoint location points at a permanent breakpoint:
static int
bp_loc_is_permanent (struct bp_location *loc)
{
...
addr = loc->address;
bpoint = gdbarch_breakpoint_from_pc (loc->gdbarch, &addr, &len);
...
if (target_read_memory (loc->address, target_mem, len) == 0
&& memcmp (target_mem, bpoint, len) == 0)
retval = 1;
...
So I think we should default the gdbarch_skip_permanent_breakpoint
hook to advancing the PC by the length of the breakpoint instruction,
as determined by gdbarch_breakpoint_from_pc. I believe that simple
implementation does the right thing for most architectures. If
there's an oddball architecture where that doesn't work, then it
should override the hook, just like it should be overriding the hook
if there was no default anyway.
The only two implementation of skip_permanent_breakpoint are
i386_skip_permanent_breakpoint, for x86, and
hppa_skip_permanent_breakpoint, for PA-RISC/HP-UX
The x86 implementation is trivial, and can clearly be replaced by the
new default.
I don't know about the HP-UX one though, I know almost nothing about
PA. It may well be advancing the PC ends up being equivalent.
Otherwise, it must be that "jump $pc_after_bp" doesn't work either...
Tested on x86_64 Fedora 20 native and gdbserver.
gdb/
2014-11-12 Pedro Alves <palves@redhat.com>
* arch-utils.c (default_skip_permanent_breakpoint): New function.
* arch-utils.h (default_skip_permanent_breakpoint): New
declaration.
* gdbarch.sh (skip_permanent_breakpoint): Now an 'f' function.
Install default_skip_permanent_breakpoint as default method.
* i386-tdep.c (i386_skip_permanent_breakpoint): Delete function.
(i386_gdbarch_init): Don't install it.
* infrun.c (resume): Assume there's always a
gdbarch_skip_permanent_breakpoint implementation.
* gdbarch.h, gdbarch.c: Regenerate.
We have a case in solib-svr4.c where we could reuse symfile-mem.c's
vDSO range lookup. Since symfile-mem.c is not present in all
configurations solib-svr4.c is, move that lookup to a gdbarch hook.
This has the minor (good) side effect that we stop even trying the
target_auxv_search lookup against targets that don't have a concept of
a vDSO, in case symfile-mem.c happens to be linked in the build
(--enable-targets=all).
Tested on x86_64 Fedora 20.
gdb/
2014-10-10 Pedro Alves <palves@redhat.com>
* arch-utils.c (default_vsyscall_range): New function.
* arch-utils.h (default_vsyscall_range): New declaration.
* gdbarch.sh (vsyscall_range): New hook.
* gdbarch.h, gdbarch.c: Regenerate.
* linux-tdep.c (linux_vsyscall_range): New function.
(linux_init_abi): Install linux_vsyscall_range as
vsyscall_range gdbarch hook.
* memrange.c (address_in_mem_range): New function.
* memrange.h (address_in_mem_range): New declaration.
* symfile-mem.c (find_vdso_size): Delete function.
(add_vsyscall_page): Use gdbarch_vsyscall_range.
Now that all instances of the regset_from_core_section gdbarch method
have been replaced by the new iterator method, delete the obsolete
method from the gdbarch interface. Adjust all invocations and
references to it.
gdb/ChangeLog:
* gdbarch.sh (regset_from_core_section): Remove gdbarch method.
* gdbarch.c: Regenerate.
* gdbarch.h: Likewise.
* corelow.c (sniff_core_bfd): Drop presence check for deleted
gdbarch method 'regset_from_core_section'.
(get_core_register_section): Remove handling for the case that
regset == NULL and regset_from_core_section is defined.
(get_core_registers): Drop check for deleted method.
* procfs.c (procfs_do_thread_registers): Adjust comment.
This adds the 'regset' parameter to the iterator callback.
Consequently the 'regset_from_core_section' method is dropped for all
targets that provide the iterator method.
This change prepares for replacing regset_from_core_section
everywhere, thereby eliminating one gdbarch interface. Since the
iterator is usually no more complex than regset_from_core_section
alone, targets that previously didn't define core_regset_sections will
then gain multi-arch capable core file generation support without
increased complexity.
gdb/ChangeLog:
* gdbarch.sh (iterate_over_regset_sections_cb): Add regset
parameter.
* gdbarch.h: Regenerate.
* corelow.c (sniff_core_bfd): Don't sniff if gdbarch has a regset
iterator.
(get_core_register_section): Add parameter 'regset' and use it, if
set. Add parameter 'min_size' and verify the bfd section size
against it.
(get_core_registers_cb): Add parameter 'regset' and pass it to
get_core_register section. For the "standard" register sections
".reg" and ".reg2", set an appropriate default for human_name.
(get_core_registers): Don't abort when the gdbarch has an iterator
but no regset_from_core_section. Add NULL/0 for parameters
'regset'/'min_size' in calls to get_core_register_section.
* linux-tdep.c (linux_collect_regset_section_cb): Add parameter
'regset' and use it instead of calling the
regset_from_core_section gdbarch method.
* i386-tdep.h (struct gdbarch_tdep): Add field 'fpregset'.
* i386-tdep.c (i386_supply_xstateregset)
(i386_collect_xstateregset, i386_xstateregset): Moved to
i386-linux-tdep.c.
(i386_regset_from_core_section): Drop handling for .reg-xfp and
.reg-xstate.
(i386_gdbarch_init): Set tdep field 'fpregset'. Enable generic
core file support only if the regset iterator hasn't been set.
* i386-linux-tdep.c (i386_linux_supply_xstateregset)
(i386_linux_collect_xstateregset, i386_linux_xstateregset): New.
Moved from i386-tdep.c and renamed to *_linux*.
(i386_linux_iterate_over_regset_sections): Add regset parameter to
each callback invocation. Allow any .reg-xstate size when reading
from a core file.
* amd64-tdep.c (amd64_supply_xstateregset)
(amd64_collect_xstateregset, amd64_xstateregset): Moved to
amd64-linux-tdep.c.
(amd64_regset_from_core_section): Remove.
(amd64_init_abi): Set new tdep field 'fpregset'. No longer
install an amd64-specific regset_from_core_section gdbarch method.
* amd64-linux-tdep.c (amd64_linux_supply_xstateregset)
(amd64_linux_collect_xstateregset, amd64_linux_xstateregset): New.
Moved from amd64-tdep.c and renamed to *_linux*.
(amd64_linux_iterate_over_regset_sections): Add regset parameter
to each callback invocation. Allow any .reg-xstate size when
reading from a core file.
* arm-linux-tdep.c (arm_linux_regset_from_core_section): Remove.
(arm_linux_iterate_over_regset_sections): Add regset parameter to
each callback invocation.
(arm_linux_init_abi): No longer set the regset_from_core_section
gdbarch method.
* ppc-linux-tdep.c (ppc_linux_regset_from_core_section): Remove.
(ppc_linux_iterate_over_regset_sections): Add regset parameter to
each callback invocation.
(ppc_linux_init_abi): No longer set the regset_from_core_section
gdbarch method.
* s390-linux-tdep.c (struct gdbarch_tdep): Remove the fields
gregset, sizeof_gregset, fpregset, and sizeof_fpregset.
(s390_regset_from_core_section): Remove.
(s390_iterate_over_regset_sections): Add regset parameter to each
callback invocation.
(s390_gdbarch_init): No longer set the regset_from_core_section
gdbarch method. Drop initialization of deleted tdep fields.
The core_regset_sections list in gdbarch (needed for multi-arch
capable core file generation support) is replaced by an iterator
method. Overall, this reduces the code a bit, and it allows for more
flexibility.
gdb/ChangeLog:
* amd64-linux-tdep.c (amd64_linux_regset_sections): Remove.
(amd64_linux_iterate_over_regset_sections): New.
(amd64_linux_init_abi_common): Don't install the regset section
list, but the new iterator in gdbarch.
* arm-linux-tdep.c (arm_linux_fpa_regset_sections)
(arm_linux_vfp_regset_sections): Remove. Move combined logic...
(arm_linux_iterate_over_regset_sections): ...here. New function.
(arm_linux_init_abi): Set iterator instead of section list.
* corelow.c (get_core_registers_cb): New function, logic moved
from...
(get_core_registers): ...loop body here. Use new iterator method
instead of walking through the regset section list.
* gdbarch.sh: Remove 'core_regset_sections'. New method
'iterate_over_regset_sections'. New typedef
'iterate_over_regset_sections_cb'.
* gdbarch.c: Regenerate.
* gdbarch.h: Likewise.
* i386-linux-tdep.c (i386_linux_regset_sections)
(i386_linux_sse_regset_sections, i386_linux_avx_regset_sections):
Remove.
(i386_linux_iterate_over_regset_sections): New.
(i386_linux_init_abi): Don't choose a regset section list, but
install new iterator in gdbarch.
* linux-tdep.c (struct linux_collect_regset_section_cb_data): New.
(linux_collect_regset_section_cb): New function, logic moved
from...
(linux_collect_thread_registers): ...loop body here. Use iterator
method instead of walking through list.
(linux_make_corefile_notes_1): Check for presence of iterator
method instead of regset section list.
* ppc-linux-tdep.c (ppc_linux_vsx_regset_sections)
(ppc_linux_vmx_regset_sections, ppc_linux_fp_regset_sections)
(ppc64_linux_vsx_regset_sections, ppc64_linux_vmx_regset_sections)
(ppc64_linux_fp_regset_sections): Remove. Move combined logic...
(ppc_linux_iterate_over_regset_sections): ...here. New function.
(ppc_linux_init_abi): Don't choose from above regset section
lists, but install new iterator in gdbarch.
* regset.h (struct core_regset_section): Remove.
* s390-linux-tdep.c (struct gdbarch_tdep): Add new fields
have_linux_v1, have_linux_v2, and have_tdb.
(s390_linux32_regset_sections, s390_linux32v1_regset_sections)
(s390_linux32v2_regset_sections, s390_linux64_regset_sections)
(s390_linux64v1_regset_sections, s390_linux64v2_regset_sections)
(s390x_linux64_regset_sections, s390x_linux64v1_regset_sections)
(s390x_linux64v2_regset_sections): Remove. Move combined logic...
(s390_iterate_over_regset_sections): ...here. New function. Use
new tdep fields.
(s390_gdbarch_init): Set new tdep fields. Don't choose from above
regset section lists, but install new iterator.
This include is needed because gdbarch_dummy_id needs the full
definition of struct frame_id.
gdb/ChangeLog:
* gdbarch.sh: #include "frame.h" in gdbarch.h. Delete "struct
frame_info" partial declaration.
* gdbarch.h: Regenerate.
Tested on x86_64-linux by rebuilding GDB.
This makes a parameter of to_info_proc const and then fixes up some
fallout, including parameters in a couple of gdbarch methods.
I could not test the procfs.c change. I verified it by inspection.
If this causes an error here, it will be trivial to fix.
2014-06-16 Tom Tromey <tromey@redhat.com>
* target.h (struct target_ops) <to_info_proc>: Make parameter
const.
(target_info_proc): Update.
* target.c (target_info_proc): Make "args" const.
* procfs.c (procfs_info_proc): Update.
* linux-tdep.c (linux_info_proc): Update.
(linux_core_info_proc_mappings): Make "args" const.
(linux_core_info_proc): Update.
* gdbarch.sh (info_proc, core_info_proc): Make "args" const.
* gdbarch.c: Rebuild.
* gdbarch.h: Rebuild.
* corelow.c (core_info_proc): Update.
This patch fixes a problem that prevented use of the Dwarf unwinders on SPU,
because dwarf2-frame.c common code did not support the situation where the
stack and/or frame pointer is maintained in a *vector* register. This is
because read_addr_from_reg is hard-coded to assume that such pointers can
be read from registers via a simple get_frame_register / unpack_pointer
operation.
Now, there *is* a routine address_from_register that calls into the
appropriate tdep routines to handle pointer values in "weird" registers
like on SPU, but it turns out I cannot simply change dwarf2-frame.c to
use address_from_register. This is because address_from_register uses
value_from_register to create a (temporary) value, and that routine
at some point calls get_frame_id in order to set up that value's
VALUE_FRAME_ID entry.
However, the dwarf2-frame.c read_addr_from_reg routine will be called
during early unwinding (to unwind the frame's CFA), at which point the
frame's ID is not actually known yet! This would cause an assert.
On the other hand, we may notice that VALUE_FRAME_ID is only needed in the
value returned by value_from_register if that value is later used as an
lvalue. But this is obviously never done to the temporary value used in
address_from_register. So, if we could change address_from_register to
not call value_from_register but instead accept constructing a value
that doesn't have VALUE_FRAME_ID set, things should be fine.
To do that, we can change the value_from_register callback to accept
a FRAME_ID instead of a FRAME; the only existing uses of the FRAME
argument were either to extract its frame ID, or its gdbarch. (To
keep a way of getting at the latter, we also change the callback's
type from "f" to "m".) Together with the required follow-on changes
in the existing value_from_register implementations (including the
default one), this seems to fix the problem.
As another minor interface cleanup, I've removed the explicit TYPE
argument from address_from_register. This routine really always
uses a default pointer type, and in the new implementation it -to
some extent- relies on that fact, in that it will now no longer
handle types that require gdbarch_convert_register_p handling.
gdb:
2014-04-17 Ulrich Weigand <uweigand@de.ibm.com>
* gdbarch.sh (value_from_register): Make class "m" instead of "f".
Replace FRAME argument with FRAME_ID.
* gdbarch.c, gdbarch.h: Regenerate.
* findvar.c (default_value_from_register): Add GDBARCH argument;
replace FRAME by FRAME_ID. No longer call get_frame_id.
(value_from_register): Update call to gdbarch_value_from_register.
* value.h (default_value_from_register): Update prototype.
* s390-linux-tdep.c (s390_value_from_register): Update interface
and call to default_value_from_register.
* spu-tdep.c (spu_value_from_register): Likewise.
* findvar.c (address_from_register): Remove TYPE argument.
Do not call value_from_register; use gdbarch_value_from_register
with null_frame_id instead.
* value.h (address_from_register): Update prototype.
* dwarf2-frame.c (read_addr_from_reg): Use address_from_register.
* dwarf2loc.c (dwarf_expr_read_addr_from_reg): Update for
address_from_register interface change.
Necessary to fix parsing auxv entries from core files on systems that use
the layout specified by ELF instead of the incompatible variant used by Linux.
gdb/Changelog:
* gdbarch.sh (auxv_parse): New.
* gdbarch.h: Regenerated.
* gdbarch.c: Regenerated.
* auxv.c (target_auxv_parse): Call gdbarch_parse_auxv if provided.
This patch removes startup_gdbarch because it is not used anymore.
After this patch,
[PATCH] Multi-process + multi-arch: GDB
https://sourceware.org/ml/gdb-patches/2012-11/msg00228.html
global variable target_gdbarch is removed and gdbarch becomes
per-inferior. Then, we don't have to keep global variable
startup_gdbarch.
Rebuild GDB with all targets. Is it OK?
gdb:
2014-02-18 Yao Qi <yao@codesourcery.com>
PR gdb/16220
* gdbarch.sh: Remove startup_gdbarch.
* gdbarch.c: Regenerated.
* gdbarch.h: Likewise.
This patch documents the return value of core_xfer_shared_libraries_aix
and core_xfer_shared_libraries gdbarch methods, and changes return
type to ULONGEST from LONGEST.
In a following patch, core_xfer_partial. is changed to check their
return values and return an appropriate target_xfer_status.
gdb:
2014-02-07 Yao Qi <yao@codesourcery.com>
* gdbarch.sh (core_xfer_shared_libraries): Returns ULONGEST. Add
comments.
(core_xfer_shared_libraries_aix): Likewise.
* gdbarch.c, gdbarch.h: Regenerated.
* i386-cygwin-tdep.c (windows_core_xfer_shared_libraries): Return
ULONGEST. Change 'len_avail' type to ULONGEST.
* rs6000-aix-tdep.c (rs6000_aix_ld_info_to_xml): Likewise.
* rs6000-aix-tdep.h (rs6000_aix_ld_info_to_xml): Update
declaration.
(rs6000_aix_core_xfer_shared_libraries_aix): Return ULONGEST.
This patch handles another aspect of the ELFv2 ABI, which unfortunately
requires common code changes.
In ELFv2, functions may provide both a global and a local entry point.
The global entry point (where the function symbol points to) is intended
to be used for function-pointer or cross-module (PLT) calls, and requires
r12 to be set up to the entry point address itself. The local entry
point (which is found at a fixed offset after the global entry point,
as defined by bits in the symbol table entries' st_other field), instead
expects r2 to be set up to the current TOC.
Now, when setting a breakpoint on a function by name, you really want
that breakpoint to trigger either way, no matter whether the function
is called via its local or global entry point. Since the global entry
point will always fall through into the local entry point, the way to
achieve that is to simply set the breakpoint at the local entry point.
One way to do that would be to have prologue parsing skip the code
sequence that makes up the global entry point. Unfortunately, this
does not work reliably, since -for optimized code- GDB these days
will not actuall invoke the prologue parsing code but instead just
set the breakpoint at the symbol address and rely on DWARF being
correct at any point throughout the function ...
Unfortunately, I don't really see any way to express the notion of
local entry points with the current set of gdbarch callbacks.
Thus this patch adds a new callback, skip_entrypoint, that is
somewhat analogous to skip_prologue, but is called every time
GDB needs to determine a function start address, even in those
cases where GDB decides to not call skip_prologue.
As a side effect, the skip_entrypoint implementation on ppc64
does not need to perform any instruction parsing; it can simply
rely on the local entry point flags in the symbol table entry.
With this implemented, two test cases would still fail to set
the breakpoint correctly, but that's because they use the construct:
gdb_test "break *hello"
Now, using "*hello" explicitly instructs GDB to set the breakpoint
at the numerical value of "hello" treated as function pointer, so
it will by definition only hit the global entry point.
I think this behaviour is unavoidable, but acceptable -- most people
do not use this construct, and if they do, they get what they
asked for ...
In one of those two test cases, use of this construct is really
not appropriate. I think this was added way back when as a means
to work around prologue skipping problems on some platforms. These
days that shouldn't really be necessary any more ...
For the other (step-bt), we really want to make sure backtracing
works on the very first instruction of the routine. To enable that
test also on powerpc64le-linux, we can modify the code to call the
test function via function pointer (which makes it use the global
entry point in the ELFv2 ABI).
gdb/ChangeLog:
* gdbarch.sh (skip_entrypoint): New callback.
* gdbarch.c, gdbarch.h: Regenerate.
* symtab.c (skip_prologue_sal): Call gdbarch_skip_entrypoint.
* infrun.c (fill_in_stop_func): Likewise.
* ppc-linux-tdep.c: Include "elf/ppc64.h".
(ppc_elfv2_elf_make_msymbol_special): New function.
(ppc_elfv2_skip_entrypoint): Likewise.
(ppc_linux_init_abi): Install them for ELFv2.
gdb/testsuite/ChangeLog:
* gdb.base/sigbpt.exp: Do not use "*" when setting breakpoint
on a function.
* gdb.base/step-bt.c: Call hello via function pointer to make
sure its first instruction is executed on powerpc64le-linux.
Add new methods to gdbarch for analyzing the instruction at a given address.
Implement those methods for i386 and amd64 architectures.
This is needed by "record btrace" to detect function calls in the
execution trace.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* amd64-tdep.c (amd64_classify_insn_at, amd64_insn_is_call)
(amd64_insn_is_ret, amd64_insn_is_jump, amd64_jmp_p): New.
(amd64_init_abi): Add insn_is_call, insn_is_ret, and insn_is_jump
to gdbarch.
* i386-tdep.c (i386_insn_is_call, i386_insn_is_ret)
(i386_insn_is_jump, i386_jmp_p): New.
(i386_gdbarch_init): Add insn_is_call, insn_is_ret, and
insn_is_jump to gdbarch.
* gdbarch.sh (insn_is_call, insn_is_ret, insn_is_jump): New.
* gdbarch.h: Regenerated.
* gdbarch.c: Regenerated.
* arch-utils.h (default_insn_is_call, default_insn_is_ret)
(default_insn_is_jump): New.
* arch-utils.c (default_insn_is_call, default_insn_is_ret)
(default_insn_is_jump): New.
This patch changes the type of 'len' from LONGEST to ULONGEST. 'len'
is the argument of gdbarch methods core_xfer_shared_libraries and
core_xfer_shared_libraries_aix.
gdb:
2014-01-14 Yao Qi <yao@codesourcery.com>
* gdbarch.sh (core_xfer_shared_libraries): Change its argument
'len''s type to ULONGEST.
(core_xfer_shared_libraries_aix): Likewise.
* gdbarch.c, gdbarch.h: Reenerated.
* i386-cygwin-tdep.c (windows_core_xfer_shared_libraries):
Change type of 'len' to ULONGEST.
* rs6000-aix-tdep.c (rs6000_aix_ld_info_to_xml): Likewise.
(rs6000_aix_core_xfer_shared_libraries_aix): Likewise.
This patch changes the return type of gdbarch_byte_order and
gdbarch_byte_order_for_code, from 'int' to 'enum bfd_endian'.
gdb:
2014-01-07 Yao Qi <yao@codesourcery.com>
* gdbarch.sh (byte_order, byte_order_for_code): Change type to
'enum bfd_endian'.
(struct gdbarch_info) <byte_order>: Change type to
'enum bfd_endian'.
<byte_order_for_code>: Likewise.
* gdbarch.c, gdbarch.h: Regenerated.
This patch extends the current generic parser for SystemTap SDT probe
arguments. It can be almost considered a cleanup, but the main point of
it is actually to allow the generic parser to accept multiple prefixes
and suffixes for the its operands (i.e., integers, register names, and
register indirection).
I have chosen to implement this as a list of const strings, and declare
this list as "static" inside each target's method used to initialize
gdbarch.
This patch is actually a preparation for an upcoming patch for ARM,
which implements the support for multiple integer prefixes (as defined
by ARM's asm spec). And AArch64 will also need this, for the same
reason.
This patch was regtested on all architectures that it touches (i.e.,
i386, x86_64, ARM, PPC/PPC64, s390x and IA-64). No regressions were found.
2013-12-19 Sergio Durigan Junior <sergiodj@redhat.com>
* amd64-tdep.c (amd64_init_abi): Declare SystemTap SDT probe
argument prefixes and suffixes. Initialize gdbarch with them.
* arm-linux-tdep.c (arm_linux_init_abi): Likewise.
* gdbarch.c: Regenerate.
* gdbarch.h: Regenerate.
* gdbarch.sh (stap_integer_prefix, stap_integer_suffix)
(stap_register_prefix, stap_register_suffix)
(stap_register_indirection_prefix)
(stap_register_indirection_suffix): Declare as "const char *const
*" instead of "const char *". Adjust printing function. Rename
all of the variables to the plural.
(pstring_list): New function.
* i386-tdep.c (i386_elf_init_abi): Declare SystemTap SDT probe
argument prefixes and suffixes. Initialize gdbarch with them.
* ia64-linux-tdep.c (ia64_linux_init_abi): Likewise.
* ppc-linux-tdep.c (ppc_linux_init_abi): Likewise.
* s390-linux-tdep.c (s390_gdbarch_init): Likewise.
* stap-probe.c (stap_is_generic_prefix): New function.
(stap_is_register_prefix): Likewise.
(stap_is_register_indirection_prefix): Likewise.
(stap_is_integer_prefix): Likewise.
(stap_generic_check_suffix): Likewise.
(stap_check_integer_suffix): Likewise.
(stap_check_register_suffix): Likewise.
(stap_check_register_indirection_suffix): Likewise.
(stap_parse_register_operand): Remove unecessary declarations for
variables holding prefix and suffix information. Use the new
functions listed above for checking for prefixes and suffixes.
(stap_parse_single_operand): Likewise.
This commit removes the "#include gdb_string.h" from gdbarch.sh, fixing
a small nit caused by Tom's commit
0e9f083f4c.
Checked-in as obvious.
2013-11-29 Sergio Durigan Junior <sergiodj@redhat.com>
* gdbarch.sh: Remove include of "gdb_string.h", replace by
<string.h>.
It will be used when one wants to convert between the internal GDB signal
representation (enum gdb_signal) and the target's representation.
The idea of this patch came from a chat between Pedro and I on IRC, plus
the discussion of my patches to add the new $_exitsignal convenience
variable:
<http://sourceware.org/ml/gdb-patches/2013-06/msg00452.html>
<http://sourceware.org/ml/gdb-patches/2013-06/msg00352.html>
What I did was to investigate, on the Linux kernel, which targets shared
the signal numbers definition with the generic definition, present at
<include/uapi/asm-generic/signal.h>. For the record, I used linux-3.10-rc7
as the main source of information, always looking at
<arch/<ARCH_NAME>/include/uapi/asm/signal.h>. For SIGRTMAX (which defaults
to _NSIG in most cases), I had to look at different signal-related
files, but most of them (except MIPS) were defined to 64 anyway.
Then, with all the differences in hand, I implemented the bits on each
target.
2013-08-09 Sergio Durigan Junior <sergiodj@redhat.com>
* linux-tdep.c: Define enum with generic signal numbers.
(linux_gdb_signal_from_target): New function.
(linux_gdb_signal_to_target): Likewise.
(linux_init_abi): Set gdbarch_gdb_signal_{to,from}_target
methods to the functions above.
* linux-tdep.h (linux_gdb_signal_from_target): New prototype.
(linux_gdb_signal_to_target): Likewise.
* alpha-linux-tdep.c: Define new enum with signals different
from generic Linux kernel.
(alpha_linux_gdb_signal_from_target): New function.
(alpha_linux_gdb_signal_to_target): Likewise.
(alpha_linux_init_abi): Set gdbarch_gdb_signal_{to,from}_target
with the functions mentioned above.
* avr-tdep.c: Define enum with differences between Linux kernel
and AVR signals.
(avr_linux_gdb_signal_from_target): New function.
(avr_linux_gdb_signal_to_target): Likewise.
(avr_gdbarch_init): Set gdbarch_gdb_signal_{to,from}_target to
the functions mentioned above.
* sparc-linux-tdep.c: Define enum with differences between SPARC
and generic Linux kernel signal numbers.
(sparc32_linux_gdb_signal_from_target): New function.
(sparc32_linux_gdb_signal_to_target): Likewise.
(sparc32_linux_init_abi): Set gdbarch_gdb_signal_{to,from}_target
to the functions defined above.
* xtensa-linux-tdep.c: Define enum with differences between
Xtensa and Linux kernel generic signals.
(xtensa_linux_gdb_signal_from_target): New function.
(xtensa_linux_gdb_signal_to_target): Likewise.
(xtensa_linux_init_abi): Set gdbarch_gdb_signal_to_target
to the functions defined above.
* mips-linux-tdep.c: Define enum with differences between
signals in MIPS and Linux kernel generic ones.
(mips_gdb_signal_to_target): New function.
(mips_gdb_signal_from_target): Redefine to use new enum, handle
only different signals from the Linux kernel generic.
(mips_linux_init_abi): Set gdbarch_gdb_signal_{to,from}_target
the functions defined above.
* mips-linux-tdep.h (enum mips_signals): Remove.
The current code attempts to provide relocation support when debugging
core files via the rs6000_xfer_partial method of the rs6000-nat
target_ops vector. However, this target_ops vector does not get pushed
on the target stack at all when debugging core files, thus bypassing
completely that part of the code.
This patch fixes the problem by extending corelow's core_xfer_partial
into handling the TARGET_OBJECT_LIBRARIES_AIX object.
gdb/ChangeLog:
* gdbarch.sh (core_xfer_shared_libraries_aix): New method.
* gdbarch.h, gdbarch.c: Regenerate.
* corelow.c (core_xfer_partial): Add TARGET_OBJECT_LIBRARIES_AIX
handling.
* rs6000-aix-tdep.h: New file.
* Makefile.in (HFILES_NO_SRCDIR): Add rs6000-aix-tdep.h.
* rs6000-aix-tdep.c: Include "rs6000-aix-tdep.h" and
"xml-utils.h".
(struct field_info, struct ld_info_desc): New types.
(ld_info32_desc, ld_info64_desc): New static constants.
(struct ld_info): New type.
(rs6000_aix_extract_ld_info): New function.
(rs6000_aix_shared_library_to_xml): Likewise.
(rs6000_aix_ld_info_to_xml): Likewise.
(rs6000_aix_core_xfer_shared_libraries_aix): Likewise.
(rs6000_aix_init_osabi): Add call to
set_gdbarch_core_xfer_shared_libraries_aix.
* rs6000-nat.c: Add "rs6000-aix-tdep.h" include.
Remove "xml-utils.h" include.
(LdInfo): Delete typedef.
(ARCH64_DECL, LDI_FIELD, LDI_NEXT, LDI_FD, LDI_FILENAME):
Delete macros.
(rs6000_ptrace_ldinfo): Change return type to gdb_byte *.
Adjust code accordingly.
(rs6000_core_ldinfo): Delete, folded into
rs6000_aix_core_xfer_shared_libraries_aix.
(rs6000_xfer_shared_library): Delete.
(rs6000_xfer_shared_libraries): Reimplement.
Denys Vlasenko <dvlasenk@redhat.com>
Pedro Alves <palves@redhat.com>
* gdbarch.sh (elfcore_write_linux_prpsinfo): New F hook.
(struct elf_internal_linux_prpsinfo): Forward declare.
* gdbarch.h, gdbarch.c: Regenerate.
* linux-tdep.c: Include `cli/cli-utils.h'.
(linux_fill_prpsinfo): New function.
(linux_make_corefile_notes): Use linux_fill_prpsinfo. If there's
an elfcore_write_linux_prpsinfo hook, use it, otherwise, use
elfcore_write_linux_prpsinfo32 or elfcore_write_linux_prpsinfo64
depending on gdbarch pointer bitness.
* ppc-linux-tdep.c: Include elf-bfd.h.
(ppc_linux_init_abi): Hook in elfcore_write_ppc_linux_prpsinfo32
on 32-bit.
Two modifications:
1. The addition of 2013 to the copyright year range for every file;
2. The use of a single year range, instead of potentially multiple
year ranges, as approved by the FSF.
copyright.py was updating gdbarch.sh' copyright years, but not
the function that genarates the copyright headers for gdbarch.[hc].
This patch makes the following changes:
- fixes gdbarch.sh and regenerates gdbarch.[hc]
- Modify copyright.py to remind the user to update gdbarch.sh
by hand. This should also remind the user to rerun the script
and update gdbarch.[hc] - see next point;
- Allow copyright.py to update gdbarch.[hc]'c copyright years,
even though these are generated files; This should free
the user from having to update gdbarch.[hc] himself;
gdb/ChangeLog:
* gdbarch.sh (copyright): Update copyright years.
* gdbarch.h, gdbarch.c: Regenerate.
* copyright.py (EXCLUDE_LIST): Remove gdbarch.h and gdbarch.c.
(MULTIPLE_COPYRIGHT_HEADERS): Add 'gdb/gdbarch.sh'.
2012-11-09 Pedro Alves <palves@redhat.com>
* gdbarch.sh (target_gdbarch) <gdbarch.h>: Reimplement as macro.
(get_target_gdbarch) <gdbarch.h>: New function.
(startup_gdbarch) <gdbarch.h>: Declare.
<gdbarch.c> (target_gdbarch): Delete.
<gdbarch.c> (deprecated_target_gdbarch_select_hack): Set the
current inferior's gdbarch.
<gdbarch.c> (get_target_gdbarch): New function.
* inferior.c: Include target-descriptions.h.
(free_inferior): Free target description info.
(add_inferior_with_spaces): Set the inferior's initial
architecture.
(clone_inferior_command): Copy the original inferior's target
description if it was user specified.
(initialize_inferiors): Add comment.
* inferior.h (struct target_desc_info): Forward declare.
(struct inferior) <gdbarch>: New field.
* linux-nat.c: Include target-descriptions.h.
(linux_child_follow_fork): Copy the parent's architecture and
target description to the child.
* target-descriptions.c: Include inferior.h.
(struct target_desc_info): New structure, holding the equivalents
of ...
(target_desc_fetched, current_target_desc)
(target_description_filename): ... these removed globals.
(get_tdesc_info, target_desc_info_from_user_p)
(copy_inferior_target_desc_info, target_desc_info_free): New.
(target_desc_fetched, current_target_desc)
(target_description_filename): Reimplemented as convenience
macros.
(tdesc_filename_cmd_string): New global.
(set_tdesc_filename_cmd): Copy the string manipulated by the "set
tdescs filename ..." commands to the per-inferior equivalent.
(show_tdesc_filename_cmd): Get the value to show from the
per-inferior description filename.
(_initilize_target_descriptions): Change the "set/show tdesc
filename" commands' variable.
* target-descriptions.h (struct target_desc, struct target_desc_info)
(struct inferior): Forward declare.
(target_find_description, target_clear_description)
(target_current_description): Adjust comments.
(copy_inferior_target_desc_info, target_desc_info_free)
(target_desc_info_from_user_p). Declare.
gdb/testsuite/
2012-11-09 Pedro Alves <palves@redhat.com>
* gdb.multi/multi-arch.exp: New.
This patch introduces the "iterate_over_objfiles_in_search_order"
gdbarch method, as well as its default implementation, and converts
the areas where it will matter to using this gdbarch method.
The default method implementation is the only one installed, and
the changes should have no functional impact in terms of behavior.
This only paves the way for the architectures that will need their
own version.
gdb/ChangeLog:
* gdbarch.sh: Add generation of
"iterate_over_objfiles_in_search_order_cb_ftype" typedef in
gdbarch.h. Add include of "objfiles.h" in gdbarch.c.
(iterate_over_objfiles_in_search_order): New gdbarch method.
* gdbarch.h, gdbarch.c: Regenerate.
* objfiles.h (default_iterate_over_objfiles_in_search_order):
Add declaration.
* objfiles.c (default_iterate_over_objfiles_in_search_order):
New function.
* symtab.c (lookup_symbol_aux_objfile): New function, extracted
out of lookup_symbol_aux_symtabs.
(lookup_symbol_aux_symtabs): Replace extracted-out code by
call to lookup_symbol_aux_objfile.
(struct global_sym_lookup_data): New type.
(lookup_symbol_global_iterator_cb): New function.
(lookup_symbol_global): Search for symbol using
gdbarch_iterate_over_objfiles_in_search_order and
lookup_symbol_global_iterator_cb.
* findvar.c (struct minsym_lookup_data): New type.
(minsym_lookup_iterator_cb): New function.
(default_read_var_value) [case LOC_UNRESOLVED]: Resolve the
symbol's address via gdbarch_iterate_over_objfiles_in_search_order
and minsym_lookup_iterator_cb.
* breakpoint.h (bp_location): Add related_address member.
* inferior.h (get_return_value): Take a pointer to struct value
instead of struct type for the function requested.
* value.h (using_struct_return): Likewise.
* gdbarch.sh (return_value): Take a pointer to struct value
instead of struct type for the function requested.
* breakpoint.c (set_breakpoint_location_function): Initialize
related_address for bp_gnu_ifunc_resolver breakpoints.
* elfread.c (elf_gnu_ifunc_resolver_return_stop): Pass the
requested function's address to gdbarch_return_value.
* eval.c (evaluate_subexp_standard): Pass the requested
function's address to using_struct_return.
* infcall.c (call_function_by_hand): Pass the requested
function's address to using_struct_return and
gdbarch_return_value.
* infcmd.c (get_return_value): Take a pointer to struct value
instead of struct type for the function requested.
(print_return_value): Update accordingly.
(finish_command_continuation): Likewise.
* stack.c (return_command): Pass the requested function's
address to using_struct_return and gdbarch_return_value.
* value.c (using_struct_return): Take a pointer to struct value
instead of struct type for the function requested. Pass the
requested function's address to gdbarch_return_value.
* python/py-finishbreakpoint.c (finish_breakpoint_object):
New function_value member, replacing function_type.
(bpfinishpy_dealloc): Update accordingly.
(bpfinishpy_pre_stop_hook): Likewise.
(bpfinishpy_init): Likewise. Record the requested function's
address.
* mips-tdep.c (mips_fval_reg): New enum.
(mips_o32_push_dummy_call): For MIPS16 FP doubles do not swap
words put in GP registers.
(mips_o64_push_dummy_call): Update a comment.
(mips_o32_return_value): Take a pointer to struct value instead
of struct type for the function requested and use it to check if
using the MIPS16 calling convention. Return the designated
general purpose registers for floating-point values returned in
MIPS16 mode.
(mips_o64_return_value): Likewise.
* ppc-tdep.h (ppc_sysv_abi_return_value): Update prototype.
(ppc_sysv_abi_broken_return_value): Likewise.
(ppc64_sysv_abi_return_value): Likewise.
* alpha-tdep.c (alpha_return_value): Take a pointer to struct
value instead of struct type for the function requested.
* amd64-tdep.c (amd64_return_value): Likewise.
* amd64-windows-tdep.c (amd64_windows_return_value): Likewise.
* arm-tdep.c (arm_return_value): Likewise.
* avr-tdep.c (avr_return_value): Likewise.
* bfin-tdep.c (bfin_return_value): Likewise.
* cris-tdep.c (cris_return_value): Likewise.
* frv-tdep.c (frv_return_value): Likewise.
* h8300-tdep.c (h8300_return_value): Likewise.
(h8300h_return_value): Likewise.
* hppa-tdep.c (hppa32_return_value): Likewise.
(hppa64_return_value): Likewise.
* i386-tdep.c (i386_return_value): Likewise.
* ia64-tdep.c (ia64_return_value): Likewise.
* iq2000-tdep.c (iq2000_return_value): Likewise.
* lm32-tdep.c (lm32_return_value): Likewise.
* m32c-tdep.c (m32c_return_value): Likewise.
* m32r-tdep.c (m32r_return_value): Likewise.
* m68hc11-tdep.c (m68hc11_return_value): Likewise.
* m68k-tdep.c (m68k_return_value): Likewise.
(m68k_svr4_return_value): Likewise.
* m88k-tdep.c (m88k_return_value): Likewise.
* mep-tdep.c (mep_return_value): Likewise.
* microblaze-tdep.c (microblaze_return_value): Likewise.
* mn10300-tdep.c (mn10300_return_value): Likewise.
* moxie-tdep.c (moxie_return_value): Likewise.
* mt-tdep.c (mt_return_value): Likewise.
* ppc-linux-tdep.c (ppc_linux_return_value): Likewise.
* ppc-sysv-tdep.c (ppc_sysv_abi_return_value): Likewise.
(ppc_sysv_abi_broken_return_value): Likewise.
(ppc64_sysv_abi_return_value): Likewise.
* ppcnbsd-tdep.c (ppcnbsd_return_value): Likewise.
* rl78-tdep.c (rl78_return_value): Likewise.
* rs6000-aix-tdep.c (rs6000_return_value): Likewise.
* rx-tdep.c (rx_return_value): Likewise.
* s390-tdep.c (s390_return_value): Likewise.
* score-tdep.c (score_return_value): Likewise.
* sh-tdep.c (sh_return_value_nofpu): Likewise.
(sh_return_value_fpu): Likewise.
* sh64-tdep.c (sh64_return_value): Likewise.
* sparc-tdep.c (sparc32_return_value): Likewise.
* sparc64-tdep.c (sparc64_return_value): Likewise.
* spu-tdep.c (spu_return_value): Likewise.
* tic6x-tdep.c (tic6x_return_value): Likewise.
* v850-tdep.c (v850_return_value): Likewise.
* vax-tdep.c (vax_return_value): Likewise.
* xstormy16-tdep.c (xstormy16_return_value): Likewise.
* xtensa-tdep.c (xtensa_return_value): Likewise.
* gdbarch.c: Regenerate.
* gdbarch.h: Regenerate.
gdb/testsuite/
* gdb.base/return-nodebug.exp: Also test float and double types.
and fields.name members from char * to const char *. All uses updated.
(struct cplus_struct_type): Change type of fn_fieldlists.name member
from char * to const char *. All uses updated.
(type_name_no_tag): Update.
(lookup_unsigned_typename, lookup_signed_typename): Update.
* gdbtypes.c (type_name_no_tag): Change result type
from char * to const char *. All callers updated.
(lookup_unsigned_typename, lookup_signed_typename): Change type of
name parameter from char * to const char *.
* symtab.h (struct cplus_specific): Change type of demangled_name
member from char * to const char *. All uses updated.
(struct general_symbol_info): Change type of name and
mangled_lang.demangled_name members from char * to const char *.
All uses updated.
(symbol_get_demangled_name, symbol_natural_name): Update.
(symbol_demangled_name, symbol_search_name): Update.
* symtab.c (symbol_get_demangled_name): Change result type
from char * to const char *. All callers updated.
(symbol_natural_name, symbol_demangled_name): Ditto.
(symbol_search_name): Ditto.
(completion_list_add_name): Change type of symname,sym_text,
text,word parameters from char * to const char *.
(completion_list_objc_symbol): Change type of sym_text,
text,word parameters from char * to const char *.
* ada-lang.c (find_struct_field): Change type of name parameter
from char * to const char *.
(encoded_ordered_before): Similarly for N0,N1 parameters.
(old_renaming_is_invisible): Similarly for function_name parameter.
(ada_type_name): Change result type from char * to const char *.
All callers updated.
* ada-lang.h (ada_type_name): Update.
* buildsym.c (hashname): Change type of name parameter
from char * to const char *.
* buildsym.h (hashname): Update.
* dbxread.c (end_psymtab): Change type of include_list parameter
from char ** to const char **.
* dwarf2read.c (determine_prefix): Change result type
from char * to const char *. All callers updated.
* f-lang.c (find_common_for_function): Change type of name, funcname
parameters from char * to const char *.
* f-lang.c (find_common_for_function): Update.
* f-valprint.c (list_all_visible_commons): Change type of funcname
parameters from char * to const char *.
* gdbarch.sh (static_transform_name): Change type of name parameter
and result from char * to const char *.
* gdbarch.c: Regenerate.
* gdbarch.h: Regenerate.
* i386-sol2-tdep.c (i386_sol2_static_transform_name): Change type
of name parameter from char * to const char *.
* jv-lang.c (java_primitive_type_from_name): Ditto.
(java_demangled_signature_length): Similarly for signature parameter.
(java_demangled_signature_copy): Ditto.
(java_demangle_type_signature): Ditto.
* jv-lang.h (java_primitive_type_from_name): Update.
(java_demangle_type_signature): Update.
* objc-lang.c (specialcmp): Change type of a,b parameters
from char * to const char *.
* p-lang.c (is_pascal_string_type): Change type of arrayname parameter
from char * to const char *. All callers updated.
* p-lang.h (is_pascal_string_type): Update.
* solib-frv.c (find_canonical_descriptor_in_load_object): Change type
of name parameter from char * to const char *.
* sparc-sol2-tdep.c (sparc_sol2_static_transform_name): Ditto.
* utils.c (fprintf_symbol_filtered): Ditto.
* defs.h (fprintf_symbol_filtered): Update.
* sparc-tdep.h (sparc_sol2_static_transform_name): Update.
* stabsread.h (end_psymtab): Update.
* stack.c (find_frame_funname): Change type of funname parameter
from char ** to const char **.
* stack.h (find_frame_funname): Update.
* typeprint.c (type_print): Change type of varstring parameter
from char * to const char *.
* value.h (type_print): Update.
* xcoffread.c (xcoff_start_psymtab): Change type of filename parameter
from char * to const char *. All callers updated.
(xcoff_end_psymtab): Change type of include_list parameter
from char ** to const char **. All callers updated.
(swap_sym): Similarly for name parameter. All callers updated.
* coffread.c (patch_type): Add (char*) cast to xfree parameter.
Use xstrdup.
(process_coff_symbol): Use xstrdup.
* stabsread.c (stabs_method_name_from_physname): Renamed from
update_method_name_from_physname. Change result type from void
to char *. All callers updated.
(read_member_functions): In has_destructor case, store name in objfile
obstack instead of malloc space. In !has_stub case, fix mem leak.
* gdbarch.c, gdbarch.h: Regenerate.
* gcore.c (gcore_memory_sections): Try gdbarch find_memory_regions
callback before falling back to target method.
* linux-nat.c (read_mapping, linux_nat_find_memory_regions): Remove.
(linux_target_install_ops): No longer install it.
* linux-tdep.c (linux_find_memory_regions): New function.
(linux_init_abi): Install it.
* gdbarch.c, gdbarch.h: Regenerate.
* infcmd.c (info_proc_cmd_1): Try gdbarch info_proc callback
before falling back to the target info_proc callback.
* linux-nat.c: Do not include "cli/cli-utils.h".
(linux_nat_info_proc): Remove.
(linux_target_install_ops): No longer install it.
* linux-tdep.c: Include "cli/cli-utils.h" and <ctype.h>.
(read_mapping): New function.
(linux_info_proc): Likewise.
(linux_init_abi): Install it.
* gdbarch.sh: New field 'long_long_align_bit'.
* gdbarch.c, gdbarch.h: Regenerate.
* i386-tdep.c (i386_gdbarch_init): Set long_long_align_bit to 32.
* jit.c (jit_read_code_entry): Use it to determine correct size offset.
* tracepoint.c (encode_actions_1): Add case for $_ret.
(validate_actionline): Check for $_ret.
(trace_dump_actions): Ditto.
* ax-gdb.h (gen_trace_for_return_address): Declare.
* ax-gdb.c: Include arch-utils.h.
(gen_trace_for_return_address): New function.
(agent_command): Add return address special case.
* amd64-tdep.c: Include ax.h and ax-gdb.h.
(amd64_gen_return_address): New function.
(amd64_init_abi): Call it.
* i386-tdep.c: Include ax.h and ax-gdb.h.
(i386_gen_return_address): New function.
(i386_init_abi): Call it.
* arch-utils.h (default_gen_return_address): Declare.
* arch-utils.c (default_gen_return_address): New function.
* gdbarch.sh (gen_return_address): New method.
* gdbarch.h, gdbarch.c: Regenerate.
* gdb.texinfo (Tracepoint Action Lists): Document $_ret.
* gdb.trace/collection.exp: Test collection of $_ret.
gdb/ChangeLog:
From Stephen Kitt <steve@sk2.org>
* breakpoint.c, breakpoint.h, cli/cli-dump.c, dwarf2expr.c,
gdbarch.c, gdbarch.sh, remote.c: Various spelling fixes.
gdb/testsuite/ChangeLog:
From Stephen Kitt <steve@sk2.org>
* gdb.base/help.exp: Adjust following some spelling corrections
in GDB.
* dwarf2loc.c (read_pieced_value): Handle get_frame_register_bytes
returning that the register piece is unavailable/optimized out.
(write_pieced_value): Handle get_frame_register_bytes returning
that the register piece is unavailable/optimized out when doing a
read-modify write of a bitfield.
* findvar.c (value_from_register): Handle get_frame_register_bytes
returning that the register piece is unavailable/optimized out.
* frame.c (get_frame_register_bytes): New parameters `optimizedp'
and `unavailablep'. Throw error on bad debug info. Use
frame_register instead of frame_register_read, to fill in the new
arguments.
* frame.h (get_frame_register_bytes): New parameters `optimizedp'
and `unavailablep'.
* valops.c: (value_assign): Adjust, and handle
get_frame_register_bytes failing.
* spu-tdep.c: Include exceptions.h.
(spu_software_single_step): Adjust, and handle
get_frame_register_bytes failing.
(spu_get_longjmp_target): Ditto.
* gdbarch.sh (register_to_value): Change to return int. New
parameters `optimizedp' and `unavailablep'.
* gdbarch.h, gdbarch.c: Regenerate.
* i386-tdep.c (i386_register_to_value): Adjust to new
gdbarch_register_to_value interface.
* i387-tdep.c (i387_register_to_value): Ditto.
* i387-tdep.h (i387_register_to_value): Ditto.
* alpha-tdep.c (alpha_register_to_value): Ditto.
* ia64-tdep.c (ia64_register_to_value): Ditto.
* m68k-tdep.c (m68k_register_to_value): Ditto.
* mips-tdep.c (mips_register_to_value): Ditto.
* rs6000-tdep.c (rs6000_register_to_value): Ditto.
* regcache.h (regcache_raw_read, regcache_raw_read_signed)
(regcache_raw_read_unsigned, regcache_raw_read_signed)
(regcache_raw_read_unsigned, regcache_raw_read_part)
(regcache_cooked_read, regcache_cooked_read_signed)
(regcache_cooked_read_unsigned, regcache_cooked_read_part)
(regcache_cooked_read_ftype): Change return to enum
register_status.
* regcache.c: Include exceptions.h
(regcache_save): Adjust to handle REG_UNAVAILABLE registers.
(do_cooked_read): Change return to enum register_status. Always
forward to regcache_cooked_read.
(regcache_raw_read): Change return to enum register_status. If
the register is not REG_VALID, memset the buffer. Return the
register's status.
(regcache_raw_read_signed): Handle non-REG_VALID registers and
return the register's status.
(regcache_raw_read_unsigned): Ditto.
(regcache_cooked_read): Change return to enum register_status.
Assert that with read-only regcaches, the register's status must
be known. If the regcache is read-only, and the register is not
REG_VALID, memset the buffer. Return the register's status.
(regcache_cooked_read_signed): Change return to enum
register_status. Handle non-REG_VALID registers and return the
register's status.
(regcache_cooked_read_unsigned): Change return to enum
register_status. Handle non-REG_VALID registers and return the
register's status.
(regcache_xfer_part, regcache_raw_read_part)
(regcache_cooked_read_part): Change return to enum
register_status. Return the register's status.
(regcache_read_pc): Throw NOT_AVAILABLE_ERROR if the register is
unavailable.
(regcache_dump): Handle unavailable cooked registers.
* frame.c (do_frame_register_read): Adjust interface to match
regcache_cooked_read_ftype.
* gdbarch.sh (pseudo_register_read): Change return to enum
register_status.
* gdbarch.h, gdbarch.c: Regenerate.
* i386-tdep.h (i386_pseudo_register_read): Change return to enum
register_status.
* i386-tdep.c (i386_pseudo_register_read): Change return to enum
register_status. If reading a raw register indicates the raw
register is not valid, return the raw register's status,
otherwise, return REG_VALID.
* amd64-tdep.c (amd64_pseudo_register_read): Change return to enum
register_status. Handle non-REG_VALID raw registers and return
the register's status.
* arm-tdep.c (arm_neon_quad_read)
(arm_pseudo_read): Change return to enum register_status. Handle
non-REG_VALID raw registers and return the register's status.
* avr-tdep.c (avr_pseudo_register_read): Ditto.
* frv-tdep.c (frv_pseudo_register_read): Ditto.
* h8300-tdep.c (h8300_pseudo_register_read): Ditto.
* hppa-tdep.c (hppa_pseudo_register_read): Ditto.
* m32c-tdep.c (m32c_move_reg_t): Change return to enum
register_status.
(m32c_raw_read, m32c_raw_write, m32c_banked_read)
(m32c_banked_write, m32c_sb_read, m32c_sb_write, m32c_part_read)
(m32c_part_write, m32c_cat_read, m32c_cat_write)
(m32c_r3r2r1r0_read, m32c_r3r2r1r0_write)
(m32c_pseudo_register_read): Change return to enum
register_status. Adjust.
* m68hc11-tdep.c (m68hc11_pseudo_register_read): Change return to
enum register_status. Return the register's status.
* mep-tdep.c (mep_pseudo_cr32_read): Change return to enum
register_status. Return the register's status.
(mep_pseudo_cr64_read, mep_pseudo_register_read): Ditto.
* mips-tdep.c (mips_pseudo_register_read): Ditto.
* mt-tdep.c (mt_pseudo_register_read): Ditto.
* rs6000-tdep.c (move_ev_register_func): New typedef.
(e500_move_ev_register): Use it. Change return to enum
register_status. Return the register's status.
(do_regcache_raw_read): New function.
(do_regcache_raw_write): New function.
(e500_pseudo_register_read): Change return to enum
register_status. Return the register's status. Use
do_regcache_raw_read.
(e500_pseudo_register_write): Adjust. Use do_regcache_raw_write.
(dfp_pseudo_register_read): Change return to enum register_status.
Return the register's status.
(vsx_pseudo_register_read): Ditto.
(efpr_pseudo_register_read): Ditto.
(rs6000_pseudo_register_read): Ditto.
* s390-tdep.c (s390_pseudo_register_read): Change return to enum
register_status. Return the register's status.
* sh64-tdep.c (pseudo_register_read_portions): New function.
(sh64_pseudo_register_read): Change return to enum
register_status. Use pseudo_register_read_portions. Return the
register's status.
* ia64-tdep.c (ia64_pseudo_register_read): Change return to enum
register_status. Return the register's status.
* sh-tdep.c (pseudo_register_read_portions): New function.
(sh_pseudo_register_read): Change return to enum register_status.
Use pseudo_register_read_portions. Return the register's status.
* sparc-tdep.c (sparc32_pseudo_register_read): Change return to
enum register_status. Return the register's status.
* sparc64-tdep.c (sparc64_pseudo_register_read): Ditto.
* spu-tdep.c (spu_pseudo_register_read_spu)
(spu_pseudo_register_read): Ditto.
* xtensa-tdep.c (xtensa_register_read_masked)
(xtensa_pseudo_register_read): Ditto.
* bfin-tdep.c (bfin_pseudo_register_read): Ditto.
PR corefile/8210
bfd/
* bfd-in2.h: Regenerate.
* corefile.c (bfd_core_file_pid): New.
* targets.c (BFD_JUMP_TABLE_CORE): Add NAME##_core_file_pid.
(struct bfd_target) <_core_file_pid>: New.
* libbfd-in.h (_bfd_nocore_core_file_pid): Declare.
* libbfd.c (_bfd_nocore_core_file_pid): New.
* elf-bfd.h (bfd_elf32_core_file_pid, bfd_elf64_core_file_pid):
Declare.
* elfcode.h (elf_core_file_pid): New define.
* elfcore.h (elf_core_file_pid): New function.
* elf.c (elfcore_make_pid): Rewrite.
(elfcore_grok_prstatus): Only set core_pid if not set yet.
(elfcore_grok_prstatus) [!HAVE_PRSTATUS_T_PR_WHO]: Fallback to
getting the lwpid from prstat.pr_pid.
* elf64-x86-64.c (elf64_x86_64_grok_prstatus): Write the LWPID to
elf_tdata's core_lwpid instead of to core_pid.
(elf64_x86_64_grok_psinfo): Extract the the main process's PID,
and store it in elf_tdata's core_pid field.
* elf32-i386.c (elf_i386_grok_prstatus): Write the LWPID to
elf_tdata's core_lwpid instead of to core_pid.
(elf_i386_grok_psinfo): Extract the the main process's PID, and
store it in elf_tdata's core_pid field.
* elf32-am33lin.c (elf32_am33lin_grok_prstatus): Write the LWPID
to elf_tdata's core_lwpid instead of to core_pid.
* elf32-arm.c (elf32_arm_nabi_grok_prstatus): Write the LWPID to
elf_tdata's core_lwpid instead of to core_pid.
* elf32-cris.c (cris_elf_grok_prstatus): Write the LWPID to
elf_tdata's core_lwpid instead of to core_pid.
* elf32-frv.c (elf32_frv_grok_prstatus): Write the LWPID to
elf_tdata's core_lwpid instead of to core_pid.
* elf32-hppa.c (elf32_hppa_grok_prstatus): Write the LWPID to
elf_tdata's core_lwpid instead of to core_pid.
* elf32-mips.c (elf32_mips_grok_prstatus): Write the LWPID to
elf_tdata's core_lwpid instead of to core_pid.
* elf32-ppc.c (ppc_elf_grok_prstatus): Write the LWPID to
elf_tdata's core_lwpid instead of to core_pid.
* elf32-s390.c (elf_s390_grok_prstatus): Write the LWPID to
elf_tdata's core_lwpid instead of to core_pid.
* elf32-score.c (s3_bfd_score_elf_grok_prstatus): Write the LWPID
to elf_tdata's core_lwpid instead of to core_pid.
* elf32-score7.c (s7_bfd_score_elf_grok_prstatus): Write the LWPID
to elf_tdata's core_lwpid instead of to core_pid.
* elf32-sh.c (elf32_shlin_grok_prstatus): Write the LWPID to
elf_tdata's core_lwpid instead of to core_pid.
* elf32-xtensa.c (elf_xtensa_grok_prstatus): Write the LWPID to
elf_tdata's core_lwpid instead of to core_pid.
* elf64-hppa.c (elf64_hppa_grok_prstatus): Write the LWPID to
elf_tdata's core_lwpid instead of to core_pid.
* elf64-mips.c (elf64_mips_grok_prstatus): Write the LWPID to
elf_tdata's core_lwpid instead of to core_pid.
* elf64-ppc.c (ppc64_elf_grok_prstatus): Write the LWPID to
elf_tdata's core_lwpid instead of to core_pid.
* elfn32-mips.c (elf32_mips_grok_prstatus): Write the LWPID to
elf_tdata's core_lwpid instead of to core_pid.
* plugin.c (bfd_plugin_core_file_pid): New function.
* aout-target.h (MY_core_file_pid): Define.
* aout-tic30.c (MY_core_file_pid, MY_core_file_p): New defines.
* coff-rs6000.c (coff_core_file_pid): New define.
(rs6000coff_vec, pmac_xcoff_vec): Use BFD_JUMP_TABLE_CORE.
* coff64-rs6000.c (coff_core_file_pid): New define.
(rs6000coff64_vec): Use BFD_JUMP_TABLE_CORE.
(xcoff64_core_file_pid): New define.
(aix5coff64_vec): Use BFD_JUMP_TABLE_CORE.
* mach-o-target.c (bfd_mach_o_core_file_pid): New define.
* aix386-core.c (aix386_core_file_pid): New define.
* hppabsd-core.c (hppabsd_core_core_file_pid): New define.
* hpux-core.c (hpux_core_core_file_pid): New define.
* irix-core.c (irix_core_core_file_pid): New define.
* lynx-core.c (lynx_core_file_pid): New define.
* osf-core.c (osf_core_core_file_pid): New define.
* ptrace-core.c (ptrace_unix_core_file_pid): New define.
* sco5-core.c (sco5_core_file_pid): New define.
* xcoff-target.h (coff_core_file_pid): New define.
* netbsd-core.c (netbsd_core_core_file_pid): New define.
gdb/
2010-08-18 Pedro Alves <pedro@codesourcery.com>
PR corefile/8210
gdb/
* corelow.c (add_to_thread_list): Don't use
gdbarch_core_reg_section_encodes_pid. Use bfd_core_file_pid.
(get_core_register_section): Don't use
gdbarch_core_reg_section_encodes_pid.
* gdbarch.sh (core_reg_section_encodes_pid): Delete.
* gdbarch.h, gdbarch.c: Regenerate.
* amd64-sol2-tdep.c (amd64_sol2_init_abi): Don't set
gdbarch_core_reg_section_encodes_pid.
* i386-sol2-tdep.c (i386_sol2_init_abi): Ditto.
* sparc-sol2-tdep.c (sparc32_sol2_init_abi): Ditto.
* sparc64-sol2-tdep.c (sparc64_sol2_init_abi): Ditto.
Throughout, call read_encoded_value with ptr_size rather than addr_size.
(decode_frame_entry_1): Remove redundant setting of
addr_size. Call gdbarch_dwarf2_addr_size rather than gdbarch_ptr_bit
to determine addr_size in Dwarf versions < 4. Set ptr_size dependent
on examined frame section. Add comment to explain why.
* gdbarch.sh (dwarf2_addr_size): Define as variable. Add lengthy
comment to explain usage.
* gdbarch.c: Regenerate.
* gdbarch.h: Regenerate.
* xstormy16-tdep.c (xstormy16_gdbarch_init): Set dwarf2_addr_size to 4.
Make core files the process_stratum.
* corefile.c (core_target): New variable.
(core_file_command): Remove variable t, use core_target.
* corelow.c (core_ops): Make it static.
(init_core_ops): Change to process_stratum. Initialize CORE_TARGET.
* defs.h (make_cleanup_unpush_target): New prototype.
* gdbarch.h: Regenerate.
* gdbarch.sh (core_pid_to_str): Remove core_stratum from its comment.
* gdbcore.h (core_target): New declaration.
* inf-ptrace.c (inf_ptrace_create_inferior, inf_ptrace_attach): New
variables ops_already_pushed and back_to. Use push_target,
make_cleanup_unpush_target and discard_cleanups calls.
* record.c (record_open): Replace core_stratum by a core_bfd check.
* target.c (target_is_pushed): New function.
(find_core_target): Remove.
* target.h (enum strata) <core_stratum>: Remove.
(target_is_pushed): New declaration.
(find_core_target): Remove declaration.
* tracepoint.c (init_tfile_ops) <to_stratum>: Remove comment.
* utils.c (do_unpush_target, make_cleanup_unpush_target): New functions.
gdb/doc/
Make core files the process_stratum.
* gdb.texinfo (Active Targets): Remove core_stratum. Include
record_stratum example.
gdb/testsuite/
Make core files the process_stratum.
* gdb.base/corefile.exp (run: load core again)
(run: sanity check we see the core file, run: with core)
(run: core file is cleared, attach: load core again)
(attach: sanity check we see the core file, attach: with core)
(attach: core file is cleared): New tests.
* gdb.base/coremaker.c (main): New parameters. Implement "sleep" argv.
2010-07-06 Ken Werner <ken.werner@de.ibm.com>
* floatformat.h (floatformat_ieee_half_big): Add declaration.
(floatformat_ieee_half_little): Likewise.
libiberty/ChangeLog:
2010-07-06 Ken Werner <ken.werner@de.ibm.com>
* floatformat.c (floatformat_ieee_half_big): New variable.
(floatformat_ieee_half_little): Likewise.
gdb/ChangeLog:
2010-07-06 Ken Werner <ken.werner@de.ibm.com>
* gdbtypes.h (floatformats_ieee_half): Add declaration.
* gdbtypes.c (floatformats_ieee_half): New variable.
* doublest.c (floatformat_from_length): Set format to
gdbarch_half_format if length matches.
* gdbarch.sh (half_bit): New architecture method.
(half_format): Likewise.
* gdbarch.h: Regenerate.
* gdbarch.c: Likewise.
solib_symbols_extension is set in the target gdbarch.
* arm-symbian-tdep.c (arm_symbian_init_abi): Set
solib_symbols_extension to "sym".
* gdbarch.sh (solib_symbols_extension): New variable.
(pstring): New function.
* gdbarch.h, gdbarch.c: Regenerate.
Stan Shebs <stan@codesourcery.com>
Add base multi-executable/process support to GDB.
gdb/
* Makefile.in (SFILES): Add progspace.c.
(COMMON_OBS): Add progspace.o.
* progspace.h: New.
* progspace.c: New.
* breakpoint.h (struct bp_target_info) <placed_address_space>: New
field.
(struct bp_location) <pspace>: New field.
(struct breakpoint) <pspace>: New field.
(bpstat_stop_status, breakpoint_here_p)
(moribund_breakpoint_here_p, breakpoint_inserted_here_p)
(regular_breakpoint_inserted_here_p)
(software_breakpoint_inserted_here_p, breakpoint_thread_match)
(set_default_breakpoint): Adjust prototypes.
(remove_breakpoints_pid, breakpoint_program_space_exit): Declare.
(insert_single_step_breakpoint, deprecated_insert_raw_breakpoint):
Adjust prototypes.
* breakpoint.c (executing_startup): Delete.
(default_breakpoint_sspace): New.
(breakpoint_restore_shadows): Skip if the address space doesn't
match.
(update_watchpoint): Record the frame's program space in the
breakpoint location.
(insert_bp_location): Record the address space in target_info.
Adjust to pass the symbol space to solib_name_from_address.
(breakpoint_program_space_exit): New.
(insert_breakpoint_locations): Switch the symbol space and thread
when inserting breakpoints. Don't insert breakpoints in a vfork
parent waiting for vfork done if we're not attached to the vfork
child.
(remove_breakpoints_pid): New.
(reattach_breakpoints): Switch to a thread of PID. Ignore
breakpoints of other symbol spaces.
(create_internal_breakpoint): Store the symbol space in the sal.
(create_longjmp_master_breakpoint): Iterate over all symbol
spaces.
(update_breakpoints_after_exec): Ignore breakpoints for other
symbol spaces.
(remove_breakpoint): Rename to ...
(remove_breakpoint_1): ... this. Pass the breakpoints symbol
space to solib_name_from_address.
(remove_breakpoint): New.
(mark_breakpoints_out): Ignore breakpoints from other symbol
spaces.
(breakpoint_init_inferior): Ditto.
(breakpoint_here_p): Add an address space argument and adjust to
use breakpoint_address_match.
(moribund_breakpoint_here_p): Ditto.
(regular_breakpoint_inserted_here_p): Ditto.
(breakpoint_inserted_here_p): Ditto.
(software_breakpoint_inserted_here_p): Ditto.
(breakpoint_thread_match): Ditto.
(bpstat_check_location): Ditto.
(bpstat_stop_status): Ditto.
(print_breakpoint_location): If there's a location to print,
switch the current symbol space.
(print_one_breakpoint_location): Add `allflag' argument.
(print_one_breakpoint): Ditto. Adjust.
(do_captured_breakpoint_query): Adjust.
(breakpoint_1): Adjust.
(breakpoint_has_pc): Also match the symbol space.
(describe_other_breakpoints): Add a symbol space argument and
adjust.
(set_default_breakpoint): Add a symbol space argument. Set
default_breakpoint_sspace.
(breakpoint_address_match): New.
(check_duplicates_for): Add an address space argument, and adjust.
(set_raw_breakpoint): Record the symbol space in the location and
in the breakpoint.
(set_longjmp_breakpoint): Skip longjmp master breakpoints from
other symbol spaces.
(remove_thread_event_breakpoints, remove_solib_event_breakpoints)
(disable_breakpoints_in_shlibs): Skip breakpoints from other
symbol spaces.
(disable_breakpoints_in_unloaded_shlib): Match symbol spaces.
(create_catchpoint): Set the symbol space in the sal.
(disable_breakpoints_before_startup): Skip breakpoints from other
symbol spaces. Set executing_startup in the current symbol space.
(enable_breakpoints_after_startup): Clear executing_startup in the
current symbol space. Skip breakpoints from other symbol spaces.
(clone_momentary_breakpoint): Also copy the symbol space.
(add_location_to_breakpoint): Set the location's symbol space.
(bp_loc_is_permanent): Switch thread and symbol space.
(create_breakpoint): Adjust.
(expand_line_sal_maybe): Expand comment to mention symbol spaces.
Switch thread and symbol space when reading memory.
(parse_breakpoint_sals): Set the symbol space in the sal.
(break_command_really): Ditto.
(skip_prologue_sal): Switch and space.
(resolve_sal_pc): Ditto.
(watch_command_1): Record the symbol space in the sal.
(create_ada_exception_breakpoint): Adjust.
(clear_command): Adjust. Match symbol spaces.
(update_global_location_list): Use breakpoint_address_match.
(breakpoint_re_set_one): Switch thread and space.
(breakpoint_re_set): Save symbol space.
(breakpoint_re_set_thread): Also reset the symbol space.
(deprecated_insert_raw_breakpoint): Add an address space argument.
Adjust.
(insert_single_step_breakpoint): Ditto.
(single_step_breakpoint_inserted_here_p): Ditto.
(clear_syscall_counts): New.
(_initialize_breakpoint): Install it as inferior_exit observer.
* exec.h: Include "progspace.h".
(exec_bfd, exec_bfd_mtime): New defines.
(exec_close): Declare.
* exec.c: Include "gdbthread.h" and "progspace.h".
(exec_bfd, exec_bfd_mtime, current_target_sections_1): Delete.
(using_exec_ops): New.
(exec_close_1): Rename to exec_close, and make public.
(exec_close): Rename to exec_close_1, and adjust all callers. Add
description. Remove target sections and close executables from
all program spaces.
(exec_file_attach): Add comment.
(add_target_sections): Check on `using_exec_ops' to check if the
target should be pushed.
(remove_target_sections): Only unpush the target if there are no
more target sections in any symbol space.
* gdbcore.h: Include "exec.h".
(exec_bfd, exec_bfd_mtime): Remove declarations.
* frame.h (get_frame_program_space, get_frame_address_space)
(frame_unwind_program_space): Declare.
* frame.c (struct frame_info) <pspace, aspace>: New fields.
(create_sentinel_frame): Add program space argument. Set the
pspace and aspace fields of the frame object.
(get_current_frame, create_new_frame): Adjust.
(get_frame_program_space): New.
(frame_unwind_program_space): New.
(get_frame_address_space): New.
* stack.c (print_frame_info): Adjust.
(print_frame): Use the frame's program space.
* gdbthread.h (any_live_thread_of_process): Declare.
* thread.c (any_live_thread_of_process): New.
(switch_to_thread): Switch the program space as well.
(restore_selected_frame): Don't warn if trying to restore frame
level 0.
* inferior.h: Include "progspace.h".
(detach_fork): Declare.
(struct inferior) <removable, aspace, pspace>
<vfork_parent, vfork_child, pending_detach>
<waiting_for_vfork_done>: New fields.
<terminal_info>: Remove field.
<data, num_data>: New fields.
(register_inferior_data, register_inferior_data_with_cleanup)
(clear_inferior_data, set_inferior_data, inferior_data): Declare.
(exit_inferior, exit_inferior_silent, exit_inferior_num_silent)
(inferior_appeared): Declare.
(find_inferior_pid): Typo.
(find_inferior_id, find_inferior_for_program_space): Declare.
(set_current_inferior, save_current_inferior, prune_inferiors)
(number_of_inferiors): Declare.
(inferior_list): Declare.
* inferior.c: Include "gdbcore.h" and "symfile.h".
(inferior_list): Make public.
(delete_inferior_1): Always delete thread silently.
(find_inferior_id): Make public.
(current_inferior_): New.
(current_inferior): Use it.
(set_current_inferior): New.
(restore_inferior): New.
(save_current_inferior): New.
(free_inferior): Free the per-inferior data.
(add_inferior_silent): Allocate per-inferior data.
Call inferior_appeared.
(delete_threads_of_inferior): New.
(delete_inferior_1): Adjust interface to take an inferior pointer.
(delete_inferior): Adjust.
(delete_inferior_silent): Adjust.
(exit_inferior_1): New.
(exit_inferior): New.
(exit_inferior_silent): New.
(exit_inferior_num_silent): New.
(detach_inferior): Adjust.
(inferior_appeared): New.
(discard_all_inferiors): Adjust.
(find_inferior_id): Make public. Assert pid is not zero.
(find_inferior_for_program_space): New.
(have_inferiors): Check if we have any inferior with pid not zero.
(have_live_inferiors): Go over all pushed targets looking for
process_stratum.
(prune_inferiors): New.
(number_of_inferiors): New.
(print_inferior): Add executable column. Print vfork parent/child
relationships.
(inferior_command): Adjust to cope with not running inferiors.
(remove_inferior_command): New.
(add_inferior_command): New.
(clone_inferior_command): New.
(struct inferior_data): New.
(struct inferior_data_registration): New.
(struct inferior_data_registry): New.
(inferior_data_registry): New.
(register_inferior_data_with_cleanup): New.
(register_inferior_data): New.
(inferior_alloc_data): New.
(inferior_free_data): New.
(clear_inferior_data): New.
(set_inferior_data): New.
(inferior_data): New.
(initialize_inferiors): New.
(_initialize_inferiors): Register "add-inferior",
"remove-inferior" and "clone-inferior" commands.
* objfiles.h: Include "progspace.h".
(struct objfile) <pspace>: New field.
(symfile_objfile, object_files): Don't declare.
(ALL_PSPACE_OBJFILES): New.
(ALL_PSPACE_OBJFILES_SAFE): New.
(ALL_OBJFILES, ALL_OBJFILES_SAFE): Adjust.
(ALL_PSPACE_SYMTABS): New.
(ALL_PRIMARY_SYMTABS): Adjust.
(ALL_PSPACE_PRIMARY_SYMTABS): New.
(ALL_PSYMTABS): Adjust.
(ALL_PSPACE_PSYMTABS): New.
* objfiles.c (object_files, symfile_objfile): Delete.
(struct objfile_sspace_info): New.
(objfiles_pspace_data): New.
(objfiles_pspace_data_cleanup): New.
(get_objfile_pspace_data): New.
(objfiles_changed_p): Delete.
(allocate_objfile): Set the objfile's program space. Adjust to
reference objfiles_changed_p in pspace data.
(free_objfile): Adjust to reference objfiles_changed_p in pspace
data.
(objfile_relocate): Ditto.
(update_section_map): Add pspace argument. Adjust to iterate over
objfiles in the passed in pspace.
(find_pc_section): Delete sections and num_sections statics.
Adjust to refer to program space's objfiles_changed_p. Adjust to
refer to sections and num_sections store in the objfile's pspace
data.
(objfiles_changed): Adjust to reference objfiles_changed_p in
pspace data.
(_initialize_objfiles): New.
* linespec.c (decode_all_digits, decode_dollar): Set the sal's
program space.
* source.c (current_source_pspace): New.
(get_current_source_symtab_and_line): Set the sal's program space.
(set_current_source_symtab_and_line): Set current_source_pspace.
(select_source_symtab): Ditto. Use ALL_OBJFILES.
(forget_cached_source_info): Iterate over all program spaces.
* symfile.c (clear_symtab_users): Adjust.
* symmisc.c (print_symbol_bcache_statistics): Iterate over all
program spaces.
(print_objfile_statistics): Ditto.
(maintenance_print_msymbols): Ditto.
(maintenance_print_objfiles): Ditto.
(maintenance_info_symtabs): Ditto.
(maintenance_info_psymtabs): Ditto.
* symtab.h (SYMTAB_PSPACE): New.
(struct symtab_and_line) <pspace>: New field.
* symtab.c (init_sal): Clear the sal's program space.
(find_pc_sect_symtab): Set the sal's program space. Switch thread
and space.
(append_expanded_sal): Add program space argument. Iterate over
all program spaces.
(expand_line_sal): Iterate over all program spaces. Switch
program space.
* target.h (enum target_waitkind) <TARGET_WAITKIND_VFORK_DONE>: New.
(struct target_ops) <to_thread_address_space>: New field.
(target_thread_address_space): Define.
* target.c (target_detach): Only remove breakpoints from the
inferior we're detaching.
(target_thread_address_space): New.
* defs.h (initialize_progspace): Declare.
* top.c (gdb_init): Call it.
* solist.h (struct so_list) <sspace>: New field.
* solib.h (struct program_space): Forward declare.
(solib_name_from_address): Adjust prototype.
* solib.c (so_list_head): Replace with a macro referencing the
program space.
(update_solib_list): Set the so's program space.
(solib_name_from_address): Add a program space argument and adjust.
* solib-svr4.c (struct svr4_info) <pid>: Delete field.
<interp_text_sect_low, interp_text_sect_high, interp_plt_sect_low>
<interp_plt_sect_high>: New fields.
(svr4_info_p, svr4_info): Delete.
(solib_svr4_sspace_data): New.
(get_svr4_info): Rewrite.
(svr4_sspace_data_cleanup): New.
(open_symbol_file_object): Adjust.
(svr4_default_sos): Adjust.
(svr4_fetch_objfile_link_map): Adjust.
(interp_text_sect_low, interp_text_sect_high, interp_plt_sect_low)
(interp_plt_sect_high): Delete.
(svr4_in_dynsym_resolve_code): Adjust.
(enable_break): Adjust.
(svr4_clear_solib): Revert bit that removed the svr4_info here,
and reinstate clearing debug_base, debug_loader_offset_p,
debug_loader_offset and debug_loader_name.
(_initialize_svr4_solib): Register solib_svr4_pspace_data. Don't
install an inferior_exit observer anymore.
* printcmd.c (struct display) <pspace>: New field.
(display_command): Set the display's sspace.
(do_one_display): Match the display's sspace.
(display_uses_solib_p): Ditto.
* linux-fork.c (detach_fork): Moved to infrun.c.
(_initialize_linux_fork): Moved "detach-on-fork" command to
infrun.c.
* infrun.c (detach_fork): Moved from linux-fork.c.
(proceed_after_vfork_done): New.
(handle_vfork_child_exec_or_exit): New.
(follow_exec_mode_replace, follow_exec_mode_keep)
(follow_exec_mode_names, follow_exec_mode_string)
(show_follow_exec_mode_string): New.
(follow_exec): New. Reinstate the mark_breakpoints_out call.
Remove shared libraries before attaching new executable. If user
wants to keep the inferior, keep it.
(displaced_step_fixup): Adjust to pass an address space to the
breakpoints module.
(resume): Ditto.
(clear_proceed_status): In all-stop mode, always clear the proceed
status of all threads.
(prepare_to_proceed): Adjust to pass an address space to the
breakpoints module.
(proceed): Ditto.
(adjust_pc_after_break): Ditto.
(handle_inferior_event): When handling a process exit, switch the
program space to the inferior's that had exited. Call
handle_vfork_child_exec_or_exit. Adjust to pass an address space
to the breakpoints module. In non-stop mode, when following a
fork and detach-fork is off, also resume the other branch. Handle
TARGET_WAITKIND_VFORK_DONE. Set the program space in sals.
(normal_stop): Prune inferiors.
(_initialize_infrun): Install the new "follow-exec-mode" command.
"detach-on-fork" moved here.
* regcache.h (get_regcache_aspace): Declare.
* regcache.c (struct regcache) <aspace>: New field.
(regcache_xmalloc): Clear the aspace.
(get_regcache_aspace): New.
(regcache_cpy): Copy the aspace field.
(regcache_cpy_no_passthrough): Ditto.
(get_thread_regcache): Fetch the thread's address space from the
target, and store it in the regcache.
* infcall.c (call_function_by_hand): Set the sal's pspace.
* arch-utils.c (default_has_shared_address_space): New.
* arch-utils.h (default_has_shared_address_space): Declare.
* gdbarch.sh (has_shared_address_space): New.
* gdbarch.h, gdbarch.c: Regenerate.
* linux-tdep.c: Include auxv.h, target.h, elf/common.h.
(linux_has_shared_address_space): New.
(_initialize_linux_tdep): Declare.
* arm-tdep.c (arm_software_single_step): Pass the frame's address
space to insert_single_step_breakpoint.
* arm-linux-tdep.c (arm_linux_software_single_step): Pass the
frame's pspace to breakpoint functions.
* cris-tdep.c (crisv32_single_step_through_delay): Ditto.
(cris_software_single_step): Ditto.
* mips-tdep.c (deal_with_atomic_sequence): Add frame argument.
Pass the frame's pspace to breakpoint functions.
(mips_software_single_step): Adjust.
(mips_single_step_through_delay): Adjust.
* rs6000-aix-tdep.c (rs6000_software_single_step): Adjust.
* rs6000-tdep.c (ppc_deal_with_atomic_sequence): Adjust.
* solib-irix.c (enable_break): Adjust to pass the current frame's
address space to breakpoint functions.
* sparc-tdep.c (sparc_software_single_step): Ditto.
* spu-tdep.c (spu_software_single_step): Ditto.
* alpha-tdep.c (alpha_software_single_step): Ditto.
* record.c (record_wait): Adjust to pass an address space to the
breakpoints module.
* fork-child.c (fork_inferior): Set the new inferior's program and
address spaces.
* inf-ptrace.c (inf_ptrace_follow_fork): Copy the parent's program
and address spaces.
(inf_ptrace_attach): Set the inferior's program and address spaces.
* linux-nat.c: Include "solib.h".
(linux_child_follow_fork): Manage parent and child's program and
address spaces. Clone the parent's program space if necessary.
Don't wait for the vfork to be done here. Refuse to resume if
following the vfork parent while leaving the child stopped.
(resume_callback): Don't resume a vfork parent.
(linux_nat_resume): Also check for pending events in the
lp->waitstatus field.
(linux_handle_extended_wait): Report TARGET_WAITKIND_VFORK_DONE
events to the core.
(stop_wait_callback): Don't wait for SIGSTOP on vfork parents.
(cancel_breakpoint): Adjust.
* linux-thread-db.c (thread_db_wait): Don't remove thread event
breakpoints here.
(thread_db_mourn_inferior): Don't mark breakpoints out here.
Remove thread event breakpoints after mourning.
* corelow.c: Include progspace.h.
(core_open): Set the inferior's program and address spaces.
* remote.c (remote_add_inferior): Set the new inferior's program
and address spaces.
(remote_start_remote): Update address spaces.
(extended_remote_create_inferior_1): Don't init the thread list if
we already debugging other inferiors.
* darwin-nat.c (darwin_attach): Set the new inferior's program and
address spaces.
* gnu-nat.c (gnu_attach): Ditto.
* go32-nat.c (go32_create_inferior): Ditto.
* inf-ttrace.c (inf_ttrace_follow_fork, inf_ttrace_attach): Ditto.
* monitor.c (monitor_open): Ditto.
* nto-procfs.c (procfs_attach, procfs_create_inferior): Ditto.
* procfs.c (do_attach): Ditto.
* windows-nat.c (do_initial_windows_stuff): Ditto.
* inflow.c (inferior_process_group)
(terminal_init_inferior_with_pgrp, terminal_inferior,
(terminal_ours_1, inflow_inferior_exit, copy_terminal_info)
(child_terminal_info, new_tty_postfork, set_sigint_trap): Adjust
to use per-inferior data instead of inferior->terminal_info.
(inflow_inferior_data): New.
(inflow_new_inferior): Delete.
(inflow_inferior_data_cleanup): New.
(get_inflow_inferior_data): New.
* mi/mi-interp.c (mi_new_inferior): Rename to...
(mi_inferior_appeared): ... this.
(mi_interpreter_init): Adjust.
* tui/tui-disasm.c: Include "progspace.h".
(tui_set_disassem_content): Pass an address space to
breakpoint_here_p.
* NEWS: Mention multi-program debugging support. Mention new
commands "add-inferior", "clone-inferior", "remove-inferior",
"maint info program-spaces", and new option "set
follow-exec-mode".
2009-10-19 Pedro Alves <pedro@codesourcery.com>
Stan Shebs <stan@codesourcery.com>
gdb/doc/
* observer.texi (new_inferior): Rename to...
(inferior_appeared): ... this.
2009-10-19 Pedro Alves <pedro@codesourcery.com>
Stan Shebs <stan@codesourcery.com>
gdb/testsuite/
* gdb.base/foll-vfork.exp: Adjust to spell out "follow-fork".
* gdb.base/foll-exec.exp: Adjust to expect a process id before
"Executing new program".
* gdb.base/foll-fork.exp: Adjust to spell out "follow-fork".
* gdb.base/multi-forks.exp: Ditto. Adjust to the inferior being
left listed after having been killed.
* gdb.base/attach.exp: Adjust to spell out "symbol-file".
* gdb.base/maint.exp: Adjust test.
* Makefile.in (ALL_SUBDIRS): Add gdb.multi.
* gdb.multi/Makefile.in: New.
* gdb.multi/base.exp: New.
* gdb.multi/goodbye.c: New.
* gdb.multi/hangout.c: New.
* gdb.multi/hello.c: New.
* gdb.multi/bkpt-multi-exec.c: New.
* gdb.multi/bkpt-multi-exec.exp: New.
* gdb.multi/crashme.c: New.
2009-10-19 Pedro Alves <pedro@codesourcery.com>
Stan Shebs <stan@codesourcery.com>
gdb/doc/
* gdb.texinfo (Inferiors): Rename node to ...
(Inferiors and Programs): ... this. Mention running multiple
programs in the same debug session.
<info inferiors>: Mention the new 'Executable' column if "info
inferiors". Update examples. Document the "add-inferior",
"clone-inferior", "remove-inferior" and "maint info
program-spaces" commands.
(Process): Rename node to...
(Forks): ... this. Document "set|show follow-exec-mode".
* gdbarch.c, gdbarch.h: Regenerate.
* arch-utils.c (default_displaced_step_hw_singlestep): New function.
* arch-utils.h (default_displaced_step_hw_singlestep): Add prototype.
* ppc-linux-tdep.c (ppc_displaced_step_hw_singlestep): New function.
(rs6000_gdbarch_init): Install it.
* infrun.c (displaced_step_fixup): Use new callback to determine
whether to "step" or "continue" displaced copy.
(resume): Likewise. Do not call maybe_software_singlestep
for displaced stepping.
(maybe_software_singlestep): Do not handle displaced stepping.
* amd64-linux-tdep.c: Include xml-syscall.h header, define the XML
syscall name for the architecture.
(amd64_linux_get_syscall_number): New function.
(amd64_linux_init_abi): Register the correct functions for syscall
catchpoint; set the correct syscall file name.
* breakpoint.c: New include: xml-syscall.h.
(set_raw_breakpoint_without_location): Setting the parameters
for the catch syscall feature.
(insert_catch_syscall): New.
(remove_catch_syscall): New.
(breakpoint_hit_catch_syscall): New.
(print_it_catch_syscall): New.
(print_one_catch_syscall): New.
(print_mention_catch_syscall): New.
(catch_syscall_breakpoint_ops): New.
(syscall_catchpoint_p): New.
(create_catchpoint_without_mention): New.
(create_catchpoint): Modified in order to use
create_catchpoint_without_mention.
(create_syscall_event_catchpoint): New.
(clean_up_filters): New.
(catch_syscall_split_args): New.
(catch_syscall_command_1): New.
(delete_breakpoint): Add cleanup for catch syscall.
(is_syscall_catchpoint_enabled): New.
(catch_syscall_enabled): New.
(catching_syscall_number): New.
(catch_syscall_completer): New completer function.
(add_catch_command): Add the completer function for catchpoints.
* breakpoint.h (syscalls_to_be_caught): New vector.
(catch_syscall_enabled): New.
(catching_syscall_number): New.
* gdbarch.c: Regenerated.
* gdbarch.h: Regenerated.
* gdbarch.sh: Add syscall catchpoint functions and structures.
(get_syscall_number): New.
(UNKNOWN_SYSCALL): New definition.
* i386-linux-nat.c (i386_linux_resume): Select the proper request
to be made for ptrace() considering if we are catching syscalls
or not.
* i386-linux-tdep.c: Include xml-syscall.h header, define the XML
syscall name for the architecture.
(i386_linux_get_syscall_number): New.
(i386_linux_init_abi): Register the correct functions for syscall
catchpoint; set the correct syscall file name.
* inf-child.c (inf_child_set_syscall_catchpoint): New.
(inf_child_target): Assign default values to target_ops.
* inf-ptrace.c (inf_ptrace_resume): Select the proper request
to be made for ptrace() considering if we are catching syscalls
or not.
* inferior.h (struct inferior): Included new variables
any_syscall_count, syscalls_counts and total_syscalls_count,
used to keep track of requested syscall catchpoints.
* infrun.c (resume): Add syscall catchpoint.
(deal_with_syscall_event): New.
(handle_inferior_event): Add syscall entry/return events.
(inferior_has_called_syscall): New.
* linux-nat.c: Define some helpful variables to track wether we have
support for the needed ptrace option.
(linux_test_for_tracesysgood): New.
(linux_supports_tracesysgood): New.
(linux_enable_tracesysgood): New.
(linux_enable_event_reporting): Save the current used ptrace
options.
(linux_child_post_attach): Calling linux_enable_tracesysgood.
(linux_child_post_startup_inferior): Likewise.
(linux_child_set_syscall_catchpoint): New function.
(linux_handle_extended_wait): Handle the case which the inferior stops
because it has called or returned from a syscall.
(linux_target_install_ops): Install the necessary functions to handle
syscall catchpoints.
* linux-nat.h (struct lwp_info): Include syscall_state into the
structure, which indicates if we are in a syscall entry or return.
* ppc-linux-tdep.c: Include xml-syscall.h header, define the XML
syscall filename for the arch.
(ppc_linux_get_syscall_number): New.
(ppc_linux_init_abi): Register the correct functions for syscall
catchpoint; setting the correct name for the XML syscall file.
* target.c (update_current_target): Update/copy functions related to
syscall catchpoint.
(target_waitstatus_to_string): Add syscall catchpoint entry/return
events.
* target.h (struct target_waitstatus): Add syscall number.
(struct syscall): New struct to hold information about syscalls
in the system.
(struct target_ops): Add ops for syscall catchpoint.
(inferior_has_called_syscall): New.
(target_set_syscall_catchpoint): New.
* xml-support.c (xml_fetch_content_from_file): New function,
transferred from xml-tdesc.c.
* xml-support.h (xml_fetch_content_from_file): New.
* xml-tdesc.c (fetch_xml_from_file): Function removed;
transferred to xml-support.c.
(file_read_description_xml): Updated to use the new
xml_fetch_content_from_file function.
* syscalls/gdb-syscalls.dtd: New definition file for syscall's XML
support.
* syscalls/amd64-linux.xml: New file containing information about
syscalls for GNU/Linux systems that use amd64 architecture.
* syscalls/i386-linux.xml: New file containing information about
syscalls for GNU/Linux systems that use i386 architecture.
* syscalls/ppc-linux.xml: New file containing information about
syscalls for GNU/Linux systems that use PPC architecture.
* syscalls/ppc64-linux.xml: New file containing information about
syscalls for GNU/Linux systems that use PPC64 architecture.
* xml-syscall.c: New file containing functions for manipulating
syscall's XML files.
* xml-syscall.h: New file, exporting the functions above mentioned.
* Makefile.in: Support for relocatable GDB datadir and XML
syscall.
* NEWS: Added information about the catch syscall feature.
* doc/gdb.texinfo (Set Catchpoints): Documentation about the new
feature.
* testsuite/Makefile.in: Inclusion of catch-syscall object.
* testsuite/gdb.base/catch-syscall.c: New file.
* testsuite/gdb.base/catch-syscall.exp: New file.
(update_global_location_list): Use gdbarch_has_global_breakpoints
instead of gdbarch_has_global_solist and
target_supports_multi_process.
* dicos-tdep.c (dicos_init_abi): Set
gdbarch_has_global_breakpoints.
* gdbarch.sh (has_global_solist): Update comment.
(has_global_breakpoints): New.
* remote.c (remote_start_remote): Use
gdbarch_has_global_breakpoints instead of
gdbarch_has_global_solist.
* target.c (target_detach): Use gdbarch_has_global_breakpoints
instead of gdbarch_has_global_solist.
* infcmd.c (attach_command): Use gdbarch_has_global_solist instead
of target_supports_multi_process.
(core_open): Find core threads before calling
post_create_inferior.
(add_to_thread_list, get_core_register_section): Take into account
systems where the regset section names encode the pid of the
inferior.
* gdbarch.sh (core_reg_section_encodes_pid): New gdbarch setting.
* gdbarch.h, gdbarch.c: Regenerate.
* amd64-sol2-tdep.c (amd64_sol2_init_abi): Set it.
* i386-sol2-tdep.c (i386_sol2_init_abi): Set it.
* sparc-sol2-tdep.c (sparc32_sol2_init_abi): Set it.
* sparc64-sol2-tdep.c (sparc64_sol2_init_abi): Set it.
due to casting a pointer to a long when printing a function
address. Instead, use host_address_to_string to convert our
address to a string.
* gdbarch.c: Regenerate.
fetch libraries and insert breakpoints after connecting.
* infcmd.c (post_create_inferior): If the solist is shared between
inferiors, no need to refetch it on every new inferior.
(detach_command): If the shared library list is shared between
inferiors, then don't clear it on every inferior detach.
* gdbarch.sh (has_global_solist): New.
* i386-dicos-tdep.c (i386_dicos_init_abi): Set
gdbarch_has_global_solist.
* target.c (target_pre_inferior): If the shared library list is
shared between inferiors, then don't clear it here, neither
invalidate the memory regions or clear the target description.
(target_detach): If the shared library list is shared between
inferiors, then don't remove breakpoints from the target here.
(target_disconnect): Comment.
* solib.c (update_solib_list): Check for null_ptid.
* breakpoint.c (insert_breakpoints, update_global_location_list):
If the shared library list is shared between inferiors, insert
breakpoints even if there's no execution.
(breakpoint_init_inferior): If the shared library list is shared
between inferiors, don't delete breakpoints or mark them
uninserted here.
* gdbarch.c, gdbarch.h: Regenerate.
Change argument of pulongest from CORE_ADDR to ULONGEST.
All callers updated.
* utils.c (plongest): Renamed from paddr_d.
(pulongest): Renamed from paddr_u, change arg type to ULONGEST.
* remote-mips.c (send_srec): Use paddr_nz instead of paddr_u in
`CORE_ADDR addr' arg of error message.
* disasm.c (gdb_disassemble_info): Set endian_code.
* gdbarch.sh (gdbarch_info): New field byte_order_for_code.
* gdbarch.h, gdbarch.c: Regenerate.
* arch-utils.c (initialize_current_architecture): Set the
default byte_order_for_code.
(gdbarch_info_init): Ditto.
(gdbarch_info_fill): Ditto.
* arm-tdep.c (SWAP_INT, SWAP_SHORT): New macros.
(thumb_analyze_prologue): Swap halfword if code endianness is
different from general endianness.
(arm_skip_prologue): Similarly.
(arm_scan_prologue): Ditto.
(thumb_get_next_pc): Ditto.
(arm_get_next_pc): Ditto.
(arm_gdbarch_init): Set byte_order_for_code from BE8 flag,
choose correct endianness for breakpoints.
core_regset_sections.
* gdbarch.c: Refreshed.
* gdbarch.h: Refreshed.
* regset.h (core_regset_section): Declared.
* linux-nat.c (linux_nat_do_thread_registers): Added
support for the new gdbarch struct core_regset_sections.
* utils.c (host_address_to_string): New function.
* defs.h (host_address_to_string): New prototype.
* i386-linux-tdep.c (i386_regset_rections): New register
sections list for i386.
(i386_linux_init_abi): Initialized new gdbarch struct
core_regset_sections.
* Makefile.in: Updated to reflect dependency changes.
* ppc-linux-tdep.c (ppc_regset_sections): Register
sections list for ppc.
(ppc_linux_init_abi): Initialized new gdbarch struct
core_regset_sections
* corelow.c (core_open): Use gdbarch_target_signal_from_host to
translate signal numeric value from the target to GDB's enum
target_signal.
* gdbarch.c, gdbarch.h: Regenerated.
* gdbarch.sh: Added two new functions target_signal_from_host and
target_signal_to_host.
* target.h (default_target_signal_from_host,
default_target_signal_to_host): New functions - declarations.
* signals/signals.c (struct gdbarch): New declaration.
(default_target_signal_to_host, default_target_signal_from_host): New
functions.
the FUNCTYPE parameter might be NULL.
* gdbarch.h: Regenerated.
* sparc-tdep.c (sparc32_push_dummy_code): Do not pass the function
type when calling using_struct_return, as this is unnecessary
on this target.
(GDB_XM_FILE, GDB_TM_FILE): Do not define.
(xm_h, tm_h): Likewise.
(DEPRECATED_TM_FILE, XM_FILE): Do not substitute into Makefile.
* configure, config.in: Regenerate.
* Makefile.in (xm_h, tm_h): Remove. Update dependencies.
(TAGS): Do not consider DEPRECATED_TM_FILE or XM_FILE.
(clean, local-maintainer-clean): Do not remove xm.h or tm.h.
* defs.h: Do not include "xm.h" or "tm.h".
* gdbarch.sh (verify_gdbarch): Do not dump GDB_XM_FILE or GDB_TM_FILE.
* gdbarch.c: Regenerate.
* config/score/embed.mt: Remove obsolete comment.
is always active if SOFTWARE_SINGLE_STEP_P is true.
(resume): Use gdbarch_software_single_step[_p] instead of
SOFTWARE_SINGLE_STEP[_P].
(handle_inferior_event): Do not check for SOFTWARE_SINGLE_STEP_P.
* gdbarch.sh (software_single_step): Remove target macro.
* gdbarch.h, gdbarch.c: Regenerate.
Maciej W. Rozycki
Sergio Durigan Junior
Pedro Alves
Andreas Arnez
Joel Brobecker
Gary Benson
Tom Tromey
Ulrich Weigand
Mark Kettenis
Yao Qi
Simon Marchi
Markus Metzger
Joel Brobecker
Stan Shebs
Ali Anwar
Jan Kratochvil
Maciej W. Rozycki
Doug Evans
Ulrich Weigand
David S. Miller
Michael Snyder
Hui Zhu
Corinna Vinschen
H.J. Lu
Daniel Jacobowitz
Pierre Muller
Carlos Eduardo Seo
Aleksandar Ristovski
Markus Deuling