This patch teaches GDB to support gnu vector in inferior calls. As a
result, fails in gdb.base/gnu_vector.exp are fixed. The calling
convention of gnu vector isn't documented in the AAPCS, because it
is the GCC extension. I checked the gcc/config/arm/arm.c, understand
how GCC pass arguments and return values, and do the same in GDB side.
The patch is tested with both hard float and soft float on arm-linux.
gdb:
2015-11-13 Yao Qi <yao.qi@linaro.org>
PR tdep/19051
* arm-tdep.c (arm_type_align): Return the right alignment
value for vector.
(arm_vfp_cprc_sub_candidate): Return true for 64-bit and
128-bit vector types.
(arm_return_in_memory): Handel vector type.
Current arm_return_in_memory isn't friendly to adding new things in it.
Moreover, a lot of stuff are about APCS, which is not used nowadays (AAPCS
is being used). This patch is to refactor arm_return_in_memory, so that
some code can be shared for both APCS and AAPCS at the beginning of
arm_return_in_memory, and then each ABI (APCS and AAPCS) are processed
separately.
gdb:
2015-11-13 Yao Qi <yao.qi@linaro.org>
* arm-tdep.c (arm_return_in_memory): Rewrite it.
(arm_return_value): Call arm_return_in_memory for
TYPE_CODE_COMPLEX.
We've already has the definition like this,
#define ELF_STRING_ARM_unwind ".ARM.exidx"
so it is better to use the macro rather than the string.
gdb:
2015-11-09 Yao Qi <yao.qi@linaro.org>
* arm-tdep.c (arm_exidx_new_objfile): Use
ELF_STRING_ARM_unwind.
ARM can have multiple breakpoint types based on the instruction set
it's currently in: arm, thumb or thumb2.
GDBServer needs to know what breakpoint is to be inserted at location
when inserting a breakpoint.
This is handled by the breakpoint_kind_from_pc and sw_breakpoint_from_kind
target ops introduced in a previous patch, this patch adds the
arm_breakpoint_kind_from_pc and arm_sw_breakpoint_from_kind implementation so
that the proper breakpoint type is returned based on the pc.
Also in order to share some code with GDB a new file called arm.c have been
introduced in arch/.
While this file does not contain much yet future patches will add more
to it thus the inclusion at this stage.
No regressions on Ubuntu 14.04 on ARMv7 and x86.
With gdbserver-{native,extended} / { -marm -mthumb }
gdb/ChangeLog:
* Makefile.in: Add arm.c/o.
* arch/arm.c: New file.
* arch/arm.h: (IS_THUMB_ADDR): Move macro from arm-tdep.c.
(MAKE_THUMB_ADDR): Likewise.
(UNMAKE_THUMB_ADDR): Likewise.
* arm-tdep.c (int thumb_insn_size): Move to arm.c.
(IS_THUMB_ADDR): Move to arm.h.
(MAKE_THUMB_ADDR): Likewise.
(UNMAKE_THUMB_ADDR): Likewise.
* configure.tgt: Add arm.o to all ARM configs.
gdb/gdbserver/ChangeLog:
* Makefile.in: Add arm.c/o.
* configure.srv: Likewise.
* linux-arm-low.c (arm_breakpoint_kinds): New enum.
(arm_breakpoint_kind_from_pc): New function.
(arm_sw_breakpoint_from_kind): Return proper kind.
(struct linux_target_ops) <breakpoint_kind_from_pc>: Initialize.
There are a bunch of places where a void* is implicitely casted into a
gdb_byte*. The auto-insert-casts script added explicit casts at those
places. However, in many cases, it makes more sense to just change the
void* to a gdb_byte*.
gdb/ChangeLog:
* aarch64-tdep.c (stack_item_t): Change type of data to gdb_byte*.
* arm-tdep.c (struct stack_item): Likewise.
(push_stack_item): Add gdb_byte* cast.
* avr-tdep.c (struct stack_item): Change type of data to gdb_byte*.
(push_stack_item): Add gdb_byte* cast.
* cli/cli-dump.c (dump_memory_to_file): Change type of buf to gdb_byte*
and add cast.
* cris-tdep.c (struct stack_item): Change type of data to gdb_byte*.
(push_stack_item): Add gdb_byte* cast.
* gcore.c (gcore_copy_callback): Change type of memhunk to gdb_byte* and
add cast.
* gdbtypes.h (print_scalar_formatted): Change type of first parameter to
gdb_byte*.
* h8300-tdep.c (h8300_extract_return_value): Change type of valbuf to
gdb_byte* and remove unnecessary cast.
(h8300h_extract_return_value): Likewise.
(h8300_store_return_value): Change type of valbuf to gdb_byte*.
(h8300h_store_return_value): Likewise.
* iq2000-tdep.c (iq2000_extract_return_value): Change type of valbuf to
gdb_byte* and remove unnecessary cast.
* jit.c (jit_reader_try_read_symtab): Change type of gdb_mem to gdb_byte*
and add cast.
* m32r-tdep.c (m32r_store_return_value): Change type of valbuf to
gdb_byte* and remove unnecessary cast.
(m32r_extract_return_value): Change type of dst to gdb_byte* and remove
valbuf.
* mep-tdep.c (mep_pseudo_cr32_read): Change type of buf to gdb_byte*.
(mep_pseudo_cr64_read): Likewise.
(mep_pseudo_csr_write): Likewise.
(mep_pseudo_cr32_write): Likewise.
(mep_pseudo_cr64_write): Likewise.
* mi/mi-main.c (mi_cmd_data_write_memory): Change type of buffer to
gdb_byte* and add cast.
* moxie-tdep.c (moxie_store_return_value): Change type of valbuf to
gdb_byte* and remove unnecessary cast.
(moxie_extract_return_value): Change type of dst to gdb_byte* and remove
valbuf.
* p-valprint.c (print_scalar_formatted): Change type of valaddr to
gdb_byte*.
* printcmd.c (void): Likewise.
* python/py-inferior.c (infpy_read_memory): Change type of buffer to
gdb_byte* and add cast.
(infpy_write_memory): Likewise.
(infpy_search_memory): Likewise.
* regcache.c (regcache_raw_write_signed): Change type of buf to gdb_byte*
and add cast.
(regcache_raw_write_unsigned): Likewise.
(regcache_cooked_write_signed): Likewise.
(regcache_cooked_write_unsigned): Likewise.
* sh64-tdep.c (h64_extract_return_value): Change type of valbuf to
gdb_byte*.
This patch is mostly extracted from Pedro's C++ branch. It adds explicit
casts from integer to enum types, where it is really the intention to do
so. This could be because we are ...
* iterating on enum values (we need to iterate on an equivalent integer)
* converting from a value read from bytes (dwarf attribute, agent
expression opcode) to the equivalent enum
* reading the equivalent integer value from another language (Python/Guile)
An exception to that is the casts in regcache.c. It seems to me like
struct regcache's register_status field could be a pointer to an array of
enum register_status. Doing so would waste a bit of memory (4 bytes
used by the enum vs 1 byte used by the current signed char, for each
register). If we switch to C++11 one day, we can define the underlying
type of an enum type, so we could have the best of both worlds.
gdb/ChangeLog:
* arm-tdep.c (set_fp_model_sfunc): Add cast from integer to enum.
(arm_set_abi): Likewise.
* ax-general.c (ax_print): Likewise.
* c-exp.y (exp : string_exp): Likewise.
* compile/compile-loc2c.c (compute_stack_depth_worker): Likewise.
(do_compile_dwarf_expr_to_c): Likewise.
* cp-name-parser.y (demangler_special : DEMANGLER_SPECIAL start):
Likewise.
* dwarf2expr.c (execute_stack_op): Likewise.
* dwarf2loc.c (dwarf2_compile_expr_to_ax): Likewise.
(disassemble_dwarf_expression): Likewise.
* dwarf2read.c (dwarf2_add_member_fn): Likewise.
(read_array_order): Likewise.
(abbrev_table_read_table): Likewise.
(read_attribute_value): Likewise.
(skip_unknown_opcode): Likewise.
(dwarf_decode_macro_bytes): Likewise.
(dwarf_decode_macros): Likewise.
* eval.c (value_f90_subarray): Likewise.
* guile/scm-param.c (gdbscm_make_parameter): Likewise.
* i386-linux-tdep.c (i386_canonicalize_syscall): Likewise.
* infrun.c (handle_command): Likewise.
* memory-map.c (memory_map_start_memory): Likewise.
* osabi.c (set_osabi): Likewise.
* parse.c (operator_length_standard): Likewise.
* ppc-linux-tdep.c (ppc_canonicalize_syscall): Likewise, and use
single return point.
* python/py-frame.c (gdbpy_frame_stop_reason_string): Likewise.
* python/py-symbol.c (gdbpy_lookup_symbol): Likewise.
(gdbpy_lookup_global_symbol): Likewise.
* record-full.c (record_full_restore): Likewise.
* regcache.c (regcache_register_status): Likewise.
(regcache_raw_read): Likewise.
(regcache_cooked_read): Likewise.
* rs6000-tdep.c (powerpc_set_vector_abi): Likewise.
* symtab.c (initialize_ordinary_address_classes): Likewise.
* target-debug.h (target_debug_print_signals): Likewise.
* utils.c (do_restore_current_language): Likewise.
This patch fixes PR 18605 which is about incorrectly decoding media
instructions in software single step.
gdb:
2015-06-30 Yao Qi <yao.qi@linaro.org>
PR tdep/18605
* arm-tdep.c (arm_get_next_pc_raw): Break for media
instructions.
This patch is to remove the global variable arm_linux_has_wmmx_registers
in arm-linux-nat.c, and add a new field have_wmmx_registers in
'struct gdbarch_tdep'.
gdb:
2015-05-28 Yao Qi <yao.qi@linaro.org>
* arm-linux-nat.c (arm_linux_has_wmmx_registers): Remove.
(arm_linux_fetch_inferior_registers): Use
tdep->have_wmmx_registers instead of arm_linux_has_wmmx_registers.
(arm_linux_store_inferior_registers): Likewise.
(arm_linux_read_description): Don't set
arm_linux_has_wmmx_registers.
* arm-tdep.c (arm_gdbarch_init): Set
tdep->have_wmmx_registers according target descriptions.
* arm-tdep.h (struct gdbarch_tdep) <have_wmmx_registers>: New
field.
This patch is to remove the global variable arm_linux_vfp_register_count
from arm-linux-nat.c. This global variable is set when native gdb
looks for the right target description according HWCAP. However,
'struct gdbarch_tdep' has already had a field have_vfp_registers, which
is a boolean about whether target has vfp registers or not. This
patch converts this boolean field to a numeric counter to replace
global variable arm_linux_vfp_register_count.
gdb:
2015-05-28 Yao Qi <yao.qi@linaro.org>
* arm-linux-nat.c (arm_linux_vfp_register_count): Remove.
(fetch_vfp_regs): Use vfp_register_count from gdbarch_tdep
instead of arm_linux_vfp_register_count.
(store_vfp_regs): Likewise.
(arm_linux_fetch_inferior_registers): Likewise.
(arm_linux_store_inferior_registers): Likewise.
(arm_linux_read_description): Don't set
arm_linux_vfp_register_count.
* arm-linux-tdep.c (arm_linux_iterate_over_regset_sections):
Adjust.
* arm-tdep.c (arm_gdbarch_init): Add assert on
vfp_register_count.
* arm-tdep.h (struct gdbarch_tdep) <have_vfp_registers>: Rename
field to vfp_register_count. All users updated.
On ARM systems, gdb must determine which style of breakpoint to use
(see the comments at the beginning of gdb/arm-linux-tdep.c). In
arm_gdbarch_init we only attempt to extract the eabi version from the
ELF binary if it is a ELFOSABI_NONE binary. If the binary is
ELFOSABI_GNU instead, we end up defaulting to the old style OABI
syscall breakpoint instruction. On a Linux kernel built without
CONFIG_OABI_COMPAT, this triggers a SIGILL in ld when attempting to
execute any ELFOSABI_GNU program.
(e.g. https://github.com/raspberrypi/linux/issues/766)
gdb/
2015-05-28 Kyle Huey <me@kylehuey.com> (tiny patch)
* gdb/arm-tdep.c (arm_gdbarch_init): Perform arm_abi detection on
ELFOSABI_GNU binaries.
We concluded that gdbarch_in_function_epilogue_p is misnamed, since it
returns true if the given PC is one instruction after the one that
destroyed the stack (which isn't necessarily inside an epilogue),
therefore it should be renamed to stack_frame_destroyed_p.
I also took the liberty of renaming the arch-specific implementations to
*_stack_frame_destroyed_p as well for consistency.
gdb:
2015-05-26 Martin Galvan <martin.galvan@tallertechnologies.com>
* amd64-tdep.c: Replace in_function_epilogue_p with
stack_frame_destroyed_p throughout.
* arch-utils.c: Ditto.
* arch-utils.h: Ditto.
* arm-tdep.c: Ditto.
* breakpoint.c: Ditto.
* gdbarch.sh: Ditto.
* hppa-tdep.c: Ditto.
* i386-tdep.c: Ditto.
* mips-tdep.c: Ditto.
* nios2-tdep.c: Ditto.
* rs6000-tdep.c: Ditto.
* s390-linux-tdep.c: Ditto.
* score-tdep.c: Ditto.
* sh-tdep.c: Ditto.
* sparc-tdep.c: Ditto.
* sparc-tdep.h: Ditto.
* sparc64-tdep.c: Ditto.
* spu-tdep.c: Ditto.
* tic6x-tdep.c: Ditto.
* tilegx-tdep.c: Ditto.
* xstormy16-tdep.c: Ditto.
* gdbarch.c, gdbarch.h: Re-generated.
Recent patch series "V2 All-stop on top of non-stop" causes a SIGSEGV
in the test case,
> -PASS: gdb.base/info-shared.exp: continue to breakpoint: library function #4
> +FAIL: gdb.base/info-shared.exp: continue to breakpoint: library function #4
>
> continue^M
> Continuing.^M
> ^M
> Program received signal SIGSEGV, Segmentation fault.^M
> 0x40021564 in ?? () gdb/testsuite/gdb.base/info-shared-solib1.so^M
> (gdb) FAIL: gdb.base/info-shared.exp: continue to breakpoint: library function #4
and an ARM displaced stepping bug is exposed. It can be reproduced by
the modified gdb.arch/arm-disp-step.exp as below,
continue^M
Continuing.^M
^M
Program received signal SIGSEGV, Segmentation fault.^M
0xa713cfcc in ?? ()^M
(gdb) FAIL: gdb.arch/arm-disp-step.exp: continue to breakpoint: continue to test_add_rn_pc_end
This patch is to fix it.
gdb:
2015-04-10 Yao Qi <yao.qi@linaro.org>
* arm-tdep.c (install_alu_reg): Update comment.
(thumb_copy_alu_reg): Remove local variable rn. Update
debugging message. Use r2 instead of r1 in the modified
instruction.
gdb/testsuite:
2015-04-10 Yao Qi <yao.qi@linaro.org>
* gdb.arch/arm-disp-step.S (main): Call test_add_rn_pc.
(test_add_rn_pc): New function.
* gdb.arch/arm-disp-step.exp (test_add_rn_pc): New proc.
(top level): Invoke test_add_rn_pc.
This commit introduces a new inline common function "startswith"
which takes two string arguments and returns nonzero if the first
string starts with the second. It also updates the 295 places
where this logic was written out longhand to use the new function.
gdb/ChangeLog:
* common/common-utils.h (startswith): New inline function.
All places where this logic was used updated to use the above.
In C++, we can't do arithmetic on enums. This patch fixes build errors like:
src/gdb/i386-tdep.c: In function ‘int i386_stap_parse_special_token(gdbarch*, stap_parse_info*)’:
src/gdb/i386-tdep.c:4309:7: error: no match for ‘operator++’ (operand type is ‘i386_stap_parse_special_token(gdbarch*, stap_parse_info*)::<anonymous enum>’)
++current_state;
^
...
src/gdb/rs6000-tdep.c:4265:18: error: no match for ‘operator++’ (operand type is ‘powerpc_vector_abi’)
src/gdb/arm-tdep.c:9428:71: error: no match for ‘operator++’ (operand type is ‘arm_float_model’)
src/gdb/arm-tdep.c:9465:64: error: no match for ‘operator++’ (operand type is ‘arm_abi_kind’)
...
gdb/ChangeLog:
2015-02-27 Tom Tromey <tromey@redhat.com>
Pedro Alves <palves@redhat.com>
* arm-tdep.c (set_fp_model_sfunc, arm_set_abi): Use 'int' for
local used to iterate over enums.
* completer.c (signal_completer): Likewise.
* i386-tdep.c (i386_stap_parse_special_token): Likewise.
* rs6000-tdep.c (powerpc_set_vector_abi): Likewise.
* tui/tui-data.c (tui_next_win, tui_prev_win): Likewise.
* tui/tui-layout.c (next_layout, prev_layout): Likewise.
* tui/tui-win.c (tui_refresh_all_win, tui_rehighlight_all)
(tui_resize_all, tui_set_focus_command, tui_all_windows_info): Likewise.
* tui-wingeneral.c (tui_refresh_all): Likewise.
Modify the ARM prologue unwinder to use the stop_reason hook instead of
returning imprecise frame id's through the arm prologue this_id hook.
gdb/
2015-02-10 Luis Machado <lgustavo@codesourcery.com>
* arm-tdep.c (arm_prologue_unwind_stop_reason): New function.
(arm_prologue_this_id): Move PC and SP limit checks to
arm_prologue_unwind_stop_reason.
(arm_prologue_unwind) <stop_reason> : Set to
arm_prologue_unwind_stop_reason.
2014-12-29 Thomas Preud'homme <thomas.preudhomme@arm.com>
gdb/
* arm-tdep.c (arm_gdbarch_init): Remove casts in Tag_ABI_VFP_args
switch case statements.
*** bfd/ChangeLog ***
2014-12-25 Thomas Preud'homme <thomas.preudhomme@arm.com>
* elf32-arm.c (elf32_arm_merge_eabi_attributes): Handle new
Tag_ABI_VFP_args value and replace hardcoded values by enum
values.
(elf32_arm_post_process_headers): Set e_flags in ELF header
as hard float only when Tag_ABI_VFP_args is 1, using new enum
value AEABI_VFP_args_vfp to check that.
*** binutils/ChangeLog ***
2014-12-25 Thomas Preud'homme <thomas.preudhomme@arm.com>
* readelf.c (arm_attr_tag_ABI_VFP_args): Add "compatible".
*** gdb/ChangeLog ***
2014-12-25 Thomas Preud'homme <thomas.preudhomme@arm.com>
* arm-tdep.c (arm_gdbarch_init): Explicitely handle value 3 of
Tag_ABI_VFP_args. Also replace hardcoded values by enum values
in the switch handling the different values of Tag_ABI_VFP_args.
*** gold/ChangeLog ***
2014-12-25 Thomas Preud'homme <thomas.preudhomme@arm.com>
* arm.cc (Target_arm::do_adjust_elf_header): Set e_flags in ELF
header as hard float only when Tag_ABI_VFP_args is 1, using new
enum value AEABI_VFP_args_vfp to check that.
(Target_arm::merge_object_attributes): Handle new Tag_ABI_VFP_args
value and replace hardcoded values by enum values.
*** include/elf/ChangeLog ***
2014-12-25 Thomas Preud'homme <thomas.preudhomme@arm.com>
* arm.h: New AEABI_FP_number_model_* and AEABI_VFP_args_* enum
values.
*** ld/testsuite/ChangeLog ***
2014-12-25 Thomas Preud'homme <thomas.preudhomme@arm.com>
* ld-arm/attr-merge-2a.s: Add Tag_ABI_VFP_args.
* ld-arm/attr-merge-2b.s: Likewise.
* ld-arm/attr-merge-2.attr: Likewise.
* ld-arm/attr-merge-4a.s: Add Tag_ABI_FP_number_model and
Tag_ABI_VFP_args.
* ld-arm/attr-merge-4b.s: Likewise.
* ld-arm/attr-merge-4.attr: Likewise.
* ld-arm/attr-merge-6a.s: Likewise.
* ld-arm/attr-merge-6b.s: Likewise.
* ld-arm/attr-merge-6.attr: Add Tag_ABI_FP_number_model.
Hi,
I see many fails in dw2-dir-file-name.exp on arm target when test
case is compiled with -marm, however, these fails are disappeared when
test case is compiled with -mthumb.
The difference of pass and fail shown below is that "0x000085d4 in" isn't
printed out, but test case expects to see it.
-Breakpoint 2, compdir_missing__ldir_missing__file_basename () at tmp-dw2-dir-file-name.c:999^M
-(gdb) FAIL: gdb.dwarf2/dw2-dir-file-name.exp: compdir_missing__ldir_missing__file_basename: continue to breakpoint: compdir_missing__ldir_missing__file_basename
+Breakpoint 2, 0x000085d4 in compdir_missing__ldir_missing__file_basename () at tmp-dw2-dir-file-name.c:999^M
+(gdb) PASS: gdb.dwarf2/dw2-dir-file-name.exp: compdir_missing__ldir_missing__file_basename: continue to breakpoint: compdir_missing__ldir_missing__file_basename
This difference is caused by setting breakpoint at the first instruction
in the function (actually, the first instruction in prologue, at [1]),
so that frame_show_address returns false, and print_frame doesn't print the
address.
0x00008620 <+0>: push {r11} ; (str r11, [sp, #-4]!) <--[1]
0x00008624 <+4>: add r11, sp, #0
0x00008628 <+8>: ldr r3, [pc, #24] ; 0x8648 <compdir_missing__ldir_missing__file_basename+40>
0x0000862c <+12>: ldr r3, [r3]
0x00008630 <+16>: add r3, r3, #1
0x00008634 <+20>: ldr r2, [pc, #12] ; 0x8648 <compdir_missing__ldir_missing__file_basename+40>
Then, it must be the arm_skip_prologue's fault that unable to skip
instructions in prologue. At the end of arm_skip_prologue, it matches
several instructions, such as "str r(0123),[r11,#-nn]" and
"str r(0123),[sp,#nn]", but "push {r11}" isn't handled.
These instruction matching code in arm_skip_prologue, which can be regarded
as leftover of development for many years, should be merged to
arm_analyze_prologue and use arm_analyze_prologue in arm_skip_prologue.
Here is the something like the history of arm_{skip,scan,analyze}_prologue.
Around 2002, there are arm_skip_prologue and arm_scan_prologue, but code are
duplicated to some extent. When match an instruction, both functions should
be modified, for example in Michael Snyder's patch
https://sourceware.org/ml/gdb-patches/2002-05/msg00205.html and Michael
expressed the willingness to merge both into one. Daniel added code call
thumb_analyze_prologue in arm_skip_prologue in 2006, but didn't handle its
counterpart arm_analyze_prologue, which is added in 2010
<https://sourceware.org/ml/gdb-patches/2010-03/msg00820.html>
however, the instructions matching at the bottom of arm_skip_prologue wasn't
cleaned up. This patch is to merge them into arm_analyze_prologue.
gdb:
2014-12-12 Yao Qi <yao@codesourcery.com>
PR tdep/14261
* arm-tdep.c (arm_skip_prologue): Remove unused local variable
'skip_pc'. Remove code skipping prologue instructions, use
arm_analyze_prologue instead.
(arm_analyze_prologue): Stop the scanning for unrecognized
instruction when skipping prologue.
This patch is to stop prologue analysis past epilogue in for arm mode,
while we've already had done the same to thumb mode (see
thumb_instruction_restores_sp). This is useful to parse functions
with empty body (epilogue follows prologue).
gdb:
2014-12-12 Yao Qi <yao@codesourcery.com>
* arm-tdep.c (arm_instruction_restores_sp): New function.
(arm_analyze_prologue): Call arm_instruction_restores_sp.
(arm_in_function_epilogue_p): Move code to
arm_instruction_restores_sp.
I find local variables framereg and framesize is only used when cache
isn't NULL. This patch to move the code into "if (cache)" block.
gdb:
2014-11-29 Yao Qi <yao@codesourcery.com>
* arm-tdep.c (arm_analyze_prologue): Move local variables
'framereg' and 'framesize' to inner block. Move code to
inner block too.
Currently "symtabs" in gdb are stored as a single linked list of
struct symtab that contains both symbol symtabs (the blockvectors)
and file symtabs (the linetables).
This has led to confusion, bugs, and performance issues.
This patch is conceptually very simple: split struct symtab into
two pieces: one part containing things common across the entire
compilation unit, and one part containing things specific to each
source file.
Example.
For the case of a program built out of these files:
foo.c
foo1.h
foo2.h
bar.c
foo1.h
bar.h
Today we have a single list of struct symtabs:
objfile -> foo.c -> foo1.h -> foo2.h -> bar.c -> foo1.h -> bar.h -> NULL
where "->" means the "next" pointer in struct symtab.
With this patch, that turns into:
objfile -> foo.c(cu) -> bar.c(cu) -> NULL
| |
v v
foo.c bar.c
| |
v v
foo1.h foo1.h
| |
v v
foo2.h bar.h
| |
v v
NULL NULL
where "foo.c(cu)" and "bar.c(cu)" are struct compunit_symtab objects,
and the files foo.c, etc. are struct symtab objects.
So now, for example, when we want to iterate over all blockvectors
we can now just iterate over the compunit_symtab list.
Plus a lot of the data that was either unused or replicated for each
symtab in a compilation unit now lives in struct compunit_symtab.
E.g., the objfile pointer, the producer string, etc.
I thought of moving "language" out of struct symtab but there is
logic to try to compute the language based on previously seen files,
and I think that's best left as is for now.
With my standard monster benchmark with -readnow (which I can't actually
do, but based on my calculations), whereas today the list requires
77MB to store all the struct symtabs, it now only requires 37MB.
A modest space savings given the gigabytes needed for all the debug info,
etc. Still, it's nice. Plus, whereas today we create a copy of dirname
for each source file symtab in a compilation unit, we now only create one
for the compunit.
So this patch is basically just a data structure reorg,
I don't expect significant performance improvements from it.
Notes:
1) A followup patch can do a similar split for struct partial_symtab.
I have left that until after I get the changes I want in to
better utilize .gdb_index (it may affect how we do partial syms).
2) Another followup patch *could* rename struct symtab.
The term "symtab" is ambiguous and has been a source of confusion.
In this patch I'm leaving it alone, calling it the "historical" name
of "filetabs", which is what they are now: just the file-name + line-table.
gdb/ChangeLog:
Split struct symtab into two: struct symtab and compunit_symtab.
* amd64-tdep.c (amd64_skip_xmm_prologue): Fetch producer from compunit.
* block.c (blockvector_for_pc_sect): Change "struct symtab *" argument
to "struct compunit_symtab *". All callers updated.
(set_block_compunit_symtab): Renamed from set_block_symtab. Change
"struct symtab *" argument to "struct compunit_symtab *".
All callers updated.
(get_block_compunit_symtab): Renamed from get_block_symtab. Change
result to "struct compunit_symtab *". All callers updated.
(find_iterator_compunit_symtab): Renamed from find_iterator_symtab.
Change result to "struct compunit_symtab *". All callers updated.
* block.h (struct global_block) <compunit_symtab>: Renamed from symtab.
hange type to "struct compunit_symtab *". All uses updated.
(struct block_iterator) <d.compunit_symtab>: Renamed from "d.symtab".
Change type to "struct compunit_symtab *". All uses updated.
* buildsym.c (struct buildsym_compunit): New struct.
(subfiles, buildsym_compdir, buildsym_objfile, main_subfile): Delete.
(buildsym_compunit): New static global.
(finish_block_internal): Update to fetch objfile from
buildsym_compunit.
(make_blockvector): Delete objfile argument.
(start_subfile): Rewrite to use buildsym_compunit. Don't initialize
debugformat, producer.
(start_buildsym_compunit): New function.
(free_buildsym_compunit): Renamed from free_subfiles_list.
All callers updated.
(patch_subfile_names): Rewrite to use buildsym_compunit.
(get_compunit_symtab): New function.
(get_macro_table): Delete argument comp_dir. All callers updated.
(start_symtab): Change result to "struct compunit_symtab *".
All callers updated. Create the subfile of the main source file.
(watch_main_source_file_lossage): Rewrite to use buildsym_compunit.
(reset_symtab_globals): Update.
(end_symtab_get_static_block): Update to use buildsym_compunit.
(end_symtab_without_blockvector): Rewrite.
(end_symtab_with_blockvector): Change result to
"struct compunit_symtab *". All callers updated.
Update to use buildsym_compunit. Don't set symtab->dirname,
instead set it in the compunit.
Explicitly make sure main symtab is first in its list.
Set debugformat, producer, blockvector, block_line_section, and
macrotable in the compunit.
(end_symtab_from_static_block): Change result to
"struct compunit_symtab *". All callers updated.
(end_symtab, end_expandable_symtab): Ditto.
(set_missing_symtab): Change symtab argument to
"struct compunit_symtab *". All callers updated.
(augment_type_symtab): Ditto.
(record_debugformat): Update to use buildsym_compunit.
(record_producer): Update to use buildsym_compunit.
* buildsym.h (struct subfile) <dirname>: Delete.
<producer, debugformat>: Delete.
<buildsym_compunit>: New member.
(get_compunit_symtab): Declare.
* dwarf2read.c (struct type_unit_group) <compunit_symtab>: Renamed
from primary_symtab. Change type to "struct compunit_symtab *".
All uses updated.
(dwarf2_start_symtab): Change result to "struct compunit_symtab *".
All callers updated.
(dwarf_decode_macros): Delete comp_dir argument. All callers updated.
(struct dwarf2_per_cu_quick_data) <compunit_symtab>: Renamed from
symtab. Change type to "struct compunit_symtab *". All uses updated.
(dw2_instantiate_symtab): Change result to "struct compunit_symtab *".
All callers updated.
(dw2_find_last_source_symtab): Ditto.
(dw2_lookup_symbol): Ditto.
(recursively_find_pc_sect_compunit_symtab): Renamed from
recursively_find_pc_sect_symtab. Change result to
"struct compunit_symtab *". All callers updated.
(dw2_find_pc_sect_compunit_symtab): Renamed from
dw2_find_pc_sect_symtab. Change result to
"struct compunit_symtab *". All callers updated.
(get_compunit_symtab): Renamed from get_symtab. Change result to
"struct compunit_symtab *". All callers updated.
(recursively_compute_inclusions): Change type of immediate_parent
argument to "struct compunit_symtab *". All callers updated.
(compute_compunit_symtab_includes): Renamed from
compute_symtab_includes. All callers updated. Rewrite to compute
includes of compunit_symtabs and not symtabs.
(process_full_comp_unit): Update to work with struct compunit_symtab.
(process_full_type_unit): Ditto.
(dwarf_decode_lines_1): Delete argument comp_dir. All callers updated.
(dwarf_decode_lines): Remove special case handling of main subfile.
(macro_start_file): Delete argument comp_dir. All callers updated.
(dwarf_decode_macro_bytes): Ditto.
* guile/scm-block.c (bkscm_print_block_syms_progress_smob): Update to
use struct compunit_symtab.
* i386-tdep.c (i386_skip_prologue): Fetch producer from compunit.
* jit.c (finalize_symtab): Build compunit_symtab.
* jv-lang.c (get_java_class_symtab): Change result to
"struct compunit_symtab *". All callers updated.
* macroscope.c (sal_macro_scope): Fetch macro table from compunit.
* macrotab.c (struct macro_table) <compunit_symtab>: Renamed from
comp_dir. Change type to "struct compunit_symtab *".
All uses updated.
(new_macro_table): Change comp_dir argument to cust,
"struct compunit_symtab *". All callers updated.
* maint.c (struct cmd_stats) <nr_compunit_symtabs>: Renamed from
nr_primary_symtabs. All uses updated.
(count_symtabs_and_blocks): Update to handle compunits.
(report_command_stats): Update output, "primary symtabs" renamed to
"compunits".
* mdebugread.c (new_symtab): Change result to
"struct compunit_symtab *". All callers updated.
(parse_procedure): Change type of search_symtab argument to
"struct compunit_symtab *". All callers updated.
* objfiles.c (objfile_relocate1): Loop over blockvectors in a
separate loop.
* objfiles.h (struct objfile) <compunit_symtabs>: Renamed from
symtabs. Change type to "struct compunit_symtab *". All uses updated.
(ALL_OBJFILE_FILETABS): Renamed from ALL_OBJFILE_SYMTABS.
All uses updated.
(ALL_OBJFILE_COMPUNITS): Renamed from ALL_OBJFILE_PRIMARY_SYMTABS.
All uses updated.
(ALL_FILETABS): Renamed from ALL_SYMTABS. All uses updated.
(ALL_COMPUNITS): Renamed from ALL_PRIMARY_SYMTABS. All uses updated.
* psympriv.h (struct partial_symtab) <compunit_symtab>: Renamed from
symtab. Change type to "struct compunit_symtab *". All uses updated.
* psymtab.c (psymtab_to_symtab): Change result type to
"struct compunit_symtab *". All callers updated.
(find_pc_sect_compunit_symtab_from_partial): Renamed from
find_pc_sect_symtab_from_partial. Change result type to
"struct compunit_symtab *". All callers updated.
(lookup_symbol_aux_psymtabs): Change result type to
"struct compunit_symtab *". All callers updated.
(find_last_source_symtab_from_partial): Ditto.
* python/py-symtab.c (stpy_get_producer): Fetch producer from compunit.
* source.c (forget_cached_source_info_for_objfile): Fetch debugformat
and macro_table from compunit.
* symfile-debug.c (debug_qf_find_last_source_symtab): Change result
type to "struct compunit_symtab *". All callers updated.
(debug_qf_lookup_symbol): Ditto.
(debug_qf_find_pc_sect_compunit_symtab): Renamed from
debug_qf_find_pc_sect_symtab, change result type to
"struct compunit_symtab *". All callers updated.
* symfile.c (allocate_symtab): Delete objfile argument.
New argument cust.
(allocate_compunit_symtab): New function.
(add_compunit_symtab_to_objfile): New function.
* symfile.h (struct quick_symbol_functions) <lookup_symbol>:
Change result type to "struct compunit_symtab *". All uses updated.
<find_pc_sect_compunit_symtab>: Renamed from find_pc_sect_symtab.
Change result type to "struct compunit_symtab *". All uses updated.
* symmisc.c (print_objfile_statistics): Compute blockvector count in
separate loop.
(dump_symtab_1): Update test for primary source symtab.
(maintenance_info_symtabs): Update to handle compunit symtabs.
(maintenance_check_symtabs): Ditto.
* symtab.c (set_primary_symtab): Delete.
(compunit_primary_filetab): New function.
(compunit_language): New function.
(iterate_over_some_symtabs): Change type of arguments "first",
"after_last" to "struct compunit_symtab *". All callers updated.
Update to loop over symtabs in each compunit.
(error_in_psymtab_expansion): Rename symtab argument to cust,
and change type to "struct compunit_symtab *". All callers updated.
(find_pc_sect_compunit_symtab): Renamed from find_pc_sect_symtab.
Change result type to "struct compunit_symtab *". All callers updated.
(find_pc_compunit_symtab): Renamed from find_pc_symtab.
Change result type to "struct compunit_symtab *". All callers updated.
(find_pc_sect_line): Only loop over symtabs within selected compunit
instead of all symtabs in the objfile.
* symtab.h (struct symtab) <blockvector>: Moved to compunit_symtab.
<compunit_symtab> New member.
<block_line_section>: Moved to compunit_symtab.
<locations_valid>: Ditto.
<epilogue_unwind_valid>: Ditto.
<macro_table>: Ditto.
<dirname>: Ditto.
<debugformat>: Ditto.
<producer>: Ditto.
<objfile>: Ditto.
<call_site_htab>: Ditto.
<includes>: Ditto.
<user>: Ditto.
<primary>: Delete
(SYMTAB_COMPUNIT): New macro.
(SYMTAB_BLOCKVECTOR): Update definition.
(SYMTAB_OBJFILE): Update definition.
(SYMTAB_DIRNAME): Update definition.
(struct compunit_symtab): New type. Common members among all source
symtabs within a compilation unit moved here. All uses updated.
(COMPUNIT_OBJFILE): New macro.
(COMPUNIT_FILETABS): New macro.
(COMPUNIT_DEBUGFORMAT): New macro.
(COMPUNIT_PRODUCER): New macro.
(COMPUNIT_DIRNAME): New macro.
(COMPUNIT_BLOCKVECTOR): New macro.
(COMPUNIT_BLOCK_LINE_SECTION): New macro.
(COMPUNIT_LOCATIONS_VALID): New macro.
(COMPUNIT_EPILOGUE_UNWIND_VALID): New macro.
(COMPUNIT_CALL_SITE_HTAB): New macro.
(COMPUNIT_MACRO_TABLE): New macro.
(ALL_COMPUNIT_FILETABS): New macro.
(compunit_symtab_ptr): New typedef.
(DEF_VEC_P (compunit_symtab_ptr)): New vector type.
gdb/testsuite/ChangeLog:
* gdb.base/maint.exp: Update expected output.
extract_arm_insn function needs to read instructions in
gdbarch_byte_order_for_code byte order, because in case armv7b,
even data is big endian, instructions are still little endian.
Currently function uses gdbarch_byte_order which would be
big endian in armv7b case.
Because of this issue pretty much all gdb.reverse/ tests are
failing with 'Process record does not support instruction' message.
Fix is to change gdbarch_byte_order to gdbarch_byte_order_for_code,
when passed to extract_unsigned_integer that reads instruction.
gdb/ChangeLog:
2014-11-02 Victor Kamensky <victor.kamensky@linaro.org>
* arm-tdep.c (extract_arm_insn): Use
gdbarch_byte_order_for_code to read arm instruction.
We are trying to insert a breakpoint on line 4 for the following
Ada code.
3 procedure STR is
4 XX : String (1 .. Blocks.Sz) := (others => 'X'); -- STOP
5 K : Integer;
6 begin
7 K := 13;
The code generated on ARM (-march=armv7-m) starts like this:
(gdb) disass str'address
Dump of assembler code for function _ada_str:
--# Line str.adb:3
0x08000014 <+0>: push {r4, r7, lr}
0x08000016 <+2>: sub sp, #28
0x08000018 <+4>: add r7, sp, #0
0x0800001a <+6>: mov r3, sp
0x0800001c <+8>: mov r4, r3
--# Line str.adb:4
0x0800001e <+10>: ldr r3, [pc, #84] ; (0x8000074 <_ada_str+96>)
0x08000020 <+12>: ldr r3, [r3, #0]
0x08000022 <+14>: str r3, [r7, #20]
0x08000024 <+16>: ldr r3, [r7, #20]
[...]
When computing the address related to str.adb:4, GDB correctly
resolves it to 0x0800001e first, but then considers the next
3 instructions as being part of the prologue because it thinks
they are part of stack-protector code. As a result, instead
of inserting the breakpoint at line 4, it skips those instruction
and consequently the rest of the instructions until the start
of the next line, which his line 7.
The stack-protector code is expected to start like this...
ldr Rn, .Label
....
.Lable:
.word __stack_chk_guard
... but the implementation actually accepts a sequence where
the ldr location points to an address for which there is no symbol.
It only aborts if the address points to a symbol which is not
__stack_chk_guard.
Since the __stack_chk_guard symbol is always expected to exist
when used (it lives in .dynsym), this patch fixes the issue by
requiring that the ldr gets the address of the __stack_chk_guard
symbol. If the address could not be resolved, then it rejects
the sequence as being stack-protector code.
gdb/ChangeLog:
* arm-tdep.c (arm_skip_stack_protector): Return early if
address loaded by first "ldr" instruction does not have
a corresponding minimal symbol. Update comment.
Tested on arm-eabi using AdaCore's testsuite.
Tested on arm-linux-gnueabi by Yao as well.
This patch fixes the bug in my patch skipping stack protector
https://www.sourceware.org/ml/gdb-patches/2010-12/msg00110.html
In my skipping stack protector patch, I misunderstood the constant vs.
immediate on instruction encodings, and treated immediate as constant
by mistake. The instruction 'ldr Rd, [PC, #immed]' loads the
address of __stack_chk_guard to Rd, and #immed is an offset from PC.
We should get the __stack_chk_guard from *(pc + #immed).
As a result of this mistake, arm_analyze_load_stack_chk_guard returns
the wrong address of __stack_chk_guard, and the symbol
__stack_chk_guard can't be found. However, we continue to match the
following instructions when symbol isn't found, so the code still
works. In other words, the code just matches the instruction pattern
without checking __stack_chk_guard symbol correctly.
Joel's patch <https://sourceware.org/ml/gdb-patches/2014-10/msg00605.html>
makes the heuristics stricter that we stop matching instructions if
symbol __stack_chk_guard isn't found. Then the bug is exposed. This
patch is to correct the load address computation for ldr instruction,
and it fixes some fails in gdb.mi/gdb792.exp on armv4t both arm and
thumb mode.
Regression tested on arm-linux-gnueabi target with
{armv4t, armv7-a} x {marm, mthumb} x {-fstack-protector,-fno-stack-protector}
gdb:
2014-10-29 Yao Qi <yao@codesourcery.com>
* arm-tdep.c (arm_analyze_load_stack_chk_guard): Compute the
loaded address correctly of ldr instruction.
When running GDB's reverse debugging testsuite against a few ARM
multilibs, i noticed failures in the machinestate* testcases.
Further investigation showed that push and pop instruction encodings
A1 and A2 were not being handled properly, thus we missed saving
important contents from registers and memory. When going backwards,
such contents were not restored and thus we ended up with a corrupted
state that did not correspond to the real values we had at a
particular point in time.
Attached is a patch that fixes around 36 failures for both
gdb.reverse/machinestate.exp and
gdb.reverse/machinestate-precsave.exp testcases, making them fully
pass. This is for both armv7 and armv4. I still see failures for
armv4 thumb though, so it needs a bit more investigation.
I see no regressions due to this patch for armv7, armv7 thumb, armv4
and armv4 thumb.
gdb/ChangeLog:
* arm-tdep.c (INSN_S_L_BIT_NUM): Document.
(arm_record_ld_st_imm_offset): Reimplement to cover all
load/store cases for ARM opcode 010.
(arm_record_ld_st_multiple): Reimplement to cover all
load/store cases for ARM opcode 100.
This patch fixes a typo in the bit mask I've made in my previous code
refactor. If PC is in the register list, the bit 8 is one, so bit
mask 0xff00 should be used. Current condition is a constant false.
gdb:
2014-09-24 Yao Qi <yao@codesourcery.com>
* arm-tdep.c (thumb_in_function_epilogue_p): Fix typo in the
bitmask.
gdb:
2014-08-13 Omair Javaid <omair.javaid@linaro.org>
* arm-tdep.c (arm_record_vdata_transfer_insn): Added record handler for
vector data transfer instructions.
(arm_record_coproc_data_proc): Updated.
gdb:
2014-08-13 Omair Javaid <omair.javaid@linaro.org>
* arm-tdep.c (arm_record_coproc_data_proc): Add record handler stubs
for asimd, vfp and coprocessor insns.
(arm_record_asimd_vfp_coproc): Add record handler for asimd, vfp
and coprocessor insns.
(thumb2_record_coproc_insn): New function.
(thumb2_record_decode_insn_handler): Update coprocessor insns record
handlers.
(decode_insn): Install arm_record_asimd_vfp_coproc as handler for
opcode 110 insns.
Hi,
This patch is to handle a software watchpoint case that program returns
to caller's epilogue, and it causes the fail in thumb mode,
finish^M
Run till exit from #0 func () at gdb/testsuite/gdb.base/watchpoint-cond-gone.c:26^M
0x000001f6 in jumper ()^M
(gdb) FAIL: gdb.base/watchpoint-cond-gone.exp: Catch the no longer valid watchpoint
In the test, jumper calls func, and programs returns from func to
jumper's epilogue, IOW, the branch instruction is the last instruction
of jumper's function body.
jumper:
.....
0x000001f2 <+10>: bl 0x200 [1] <---- indirect call to func
0x000001f6 <+14>: mov sp, r7 [2] <---- start of the epilogue
0x000001f8 <+16>: add sp, #8
0x000001fa <+18>: pop {r7}
0x000001fc <+20>: pop {r0}
0x000001fe <+22>: bx r0
When the inferior returns from func back to jumper, it is expected
that an expression of a software watchpoint becomes out-of-scope.
GDB validates the expression by checking the corresponding frame,
but this check is guarded by gdbarch_in_function_epilogue_p. See
breakpoint.c:watchpoint_check.
It doesn't work in this case, because program returns from func's
epilogue back to jumper's epilogue [2], GDB thinks the program is
still within the epilogue, but in fact it goes to a different one.
When PC points at [2], the sp-restore instruction is to be
executed, so the stack frame isn't destroyed yet and we can still
use the frame mechanism reliably.
Note that when PC points to the first instruction of restoring SP,
it is part of epilogue, but we still return zero. When goes to
the next instruction, the backward scan will still match the
epilogue sequence correctly. The reason for doing this is to
handle the "return-to-epilogue" case.
What this patch does is to restrict the epilogue matching that let
GDB think the first SP restore instruction isn't part of the epilogue,
and fall back to use frame mechanism. We set 'found_stack_adjust'
zero before backward scan, and we've done this for arm mode
counterpart (arm_in_function_epilogue_p) too.
The patch is tested in arm-none-eabi and arm-none-linux-gnueabi with
various multilibs. OK to apply?
gdb:
2014-08-28 Yao Qi <yao@codesourcery.com>
* arm-tdep.c (thumb_in_function_epilogue_p): Don't set
found_stack_adjust in forward scan. Remove condition check
on found_stack_adjust which is always true. Indent the code.
We would like to wrap examples, output or code snippet in comments with
blank lines, and move */ to a new line if the comment is ended with the
example.
gdb:
2014-08-20 Yao Qi <yao@codesourcery.com>
* amd64-tdep.c (amd64_classify): Add a blank line after the
example. Move "*/" to a new line.
* arm-tdep.c (arm_vfp_cprc_sub_candidate): Likewise.
* arm-wince-tdep.c (arm_pe_skip_trampoline_code): Likewise.
* dwarf2read.c (psymtab_include_file_name): Likewise.
Hi,
When we pass "-mfloat-abi=hard" flag in the GDB testing, we see the
following fails,
FAIL: gdb.base/callfuncs.exp: p t_float_complex_values(fc1, fc2)
FAIL: gdb.base/callfuncs.exp: p t_float_complex_many_args(fc1, fc2, fc3, fc4, fc1, fc2, fc3, fc4, fc1, fc2, fc3, fc4, fc1, fc2, fc3, fc4)
FAIL: gdb.base/callfuncs.exp: p t_double_complex_values(dc1, dc2)
FAIL: gdb.base/callfuncs.exp: p t_double_complex_many_args(dc1, dc2, dc3, dc4, dc1, dc2, dc3, dc4, dc1, dc2, dc3, dc4, dc1, dc2, dc3, dc4)
FAIL: gdb.base/callfuncs.exp: p t_long_double_complex_values(ldc1, ldc2)
FAIL: gdb.base/callfuncs.exp: p t_long_double_complex_many_args(ldc1, ldc2, ldc3, ldc4, ldc1, ldc2, ldc3, ldc4, ldc1, ldc2, ldc3, ldc4, ldc1, ldc2, ldc3, ldc4)
FAIL: gdb.base/callfuncs.exp: call inferior func with struct - returns float _Complex
FAIL: gdb.base/callfuncs.exp: call inferior func with struct - returns double _Complex
The hard-VFP ABI was supported by GDB overal, done by this patch
https://sourceware.org/ml/gdb-patches/2009-07/msg00686.html but
"vectors and complex types are not currently supported", mentioned in
the patch. As a result, these tests fail.
This patch is to support _Complex types in hard-VFP abi. As specified
in "7.1.1, Procedure Call Standard for the ARM Arch", the layout of
_Complex types is a struct, which is identical to the layout on amd64,
so I copy Mark's comments to amd64 support.
Regression tested on arm-none-eabi target. OK to apply?
gdb:
2014-08-19 Yao Qi <yao@codesourcery.com>
* arm-tdep.c (arm_vfp_cprc_sub_candidate): Handle _Complex
types.
We see a fail in gdb.trace/entry-values.exp on armv4t thumb,
bt^M
#0 0x000086fc in foo (i=0, i@entry=<optimized out>, j=2, j@entry=<optimized out>)^M
#1 0x00000002 in ?? ()^M
Backtrace stopped: previous frame identical to this frame (corrupt stack?)^M
(gdb) FAIL: gdb.trace/entry-values.exp: bt (1) (pattern 1)
The fail is caused by incorrect prologue analysis, which can be illustrated by
setting a breakpoint on function foo,
(gdb) disassemble foo
Dump of assembler code for function foo:
0x000086e8 <+0>: push {r7, lr}
0x000086ea <+2>: sub sp, #8
0x000086ec <+4>: add r7, sp, #0
0x000086ee <+6>: str r0, [r7, #4]
0x000086f0 <+8>: str r1, [r7, #0]
0x000086f2 <+10>: movs r3, #0
0x000086f4 <+12>: adds r0, r3, #0
0x000086f6 <+14>: mov sp, r7
0x000086f8 <+16>: add sp, #8
0x000086fa <+18>: pop {r7}
0x000086fc <+20>: pop {r1}
0x000086fe <+22>: bx r1
End of assembler dump.
(gdb) b foo
Breakpoint 1 at 0x86fc
As we can see, GDB analyzes the prologue and skip the prologue to the last
instruction but one. The breakpoint is set within the epilogue, and GDB
skips too many instruction for prologue. This patch teaches GDB to stop
prologue analysis when goes into the epilogue. With this patch applied,
GDB is able to unwind correctly,
(gdb) bt
#0 0x000086f6 in foo (i=0, i@entry=2, j=2, j@entry=3)
#1 0x00008718 in bar (i=<optimized out>)
#2 0x00008758 in main ()
gdb:
2014-07-11 Yao Qi <yao@codesourcery.com>
* arm-tdep.c (thumb_analyze_prologue): Break the loop if
thumb_instruction_restores_sp return true.
This is a refactor patch, that moves matching instructions adjusting
SP into a new function, thumb_instruction_restores_sp. The second
call to thumb_instruction_restores_sp in thumb_in_function_epilogue_p
is a little different from the original. The original code matches
'POP <registers> without PC', but thumb_in_function_epilogue_p matches
'POP <registers> (with and without PC)'. However, GDB found one
instruction about return and is scanning the previous instruction,
which should be an instruction about return too, so the code change
doesn't affect the functionality.
gdb:
2014-07-11 Yao Qi <yao@codesourcery.com>
* arm-tdep.c (thumb_instruction_restores_sp): New function.
(thumb_in_function_epilogue_p): Call
thumb_instruction_restores_sp.
Currently, GDB matches both add/sub sp, #imm in prologue and epilogue,
which is not very precise. On the instruction level, the immediate
number in both instruction can't be negative, so 'sub sp, #imm' only
appears in prologue while 'add sp, #imm' only appears in epilogue.
Note that on assembly level, we can write 'add sp, -8', but gas will
translate to 'sub sp, 8' instruction.
This patch is to only match 'sub sp, #imm' in prologue and match
'add sp, #immm' in epilogue. It paves the way for the following
patch.
gdb:
2014-07-11 Yao Qi <yao@codesourcery.com>
* arm-tdep.c (thumb_analyze_prologue): Don't match instruction
'add sp, #imm'.
(thumb_in_function_epilogue_p): Don't match 'sub sp, #imm'.
In target arm-none-eabi, prologue unwinder is used for trampoline
'bx reg'. However, in target arm-linux, exidx unwinder is selected for
trampoline at first, which is not expected. The main function and the
trampoline is,
0x00009dfc <main+0>: push {r4, r5, r6, r7, lr}
......
0x0000ac30 <main+3636>: ldrdeq r3, [r1], -r8
0x0000ac34: bx r2
0x0000ac36: bx r4
and .ARM.exidx is:
0x9dfc <main>: @0xb404
Compact model index: 1
0x97 vsp = r7
0x20 vsp = vsp + 132
0x3f vsp = vsp + 256
0x80 0xf0 pop {r8, r9, r10, r11}
0xab pop {r4, r5, r6, r7, r14}
0xac38 <__aeabi_drsub>: 0x1 [cantunwind]
Trampolines 'bx r2' and 'bx r4' doesn't belong to main, but the exidx
for main is still selected form them because there is no end address
of each exidx entry.
Instead of teaching exidx unwinder ignore this trampoline (which looks
complicated and error prone), I decide to let stub unwinder to handle
trampoline, because stub undwinder is installed before exidx unwinder,
and this trampoline can be regarded as a stub too.
This patch is to add the code to match 'bx reg' trampoline in the
sniffer of stub unwinder.
gdb:
2014-06-24 Yao Qi <yao@codesourcery.com>
* arm-tdep.c (arm_stub_unwind_sniffer): Return 1 if
arm_skip_bx_reg returns non-zero.
After this patch
<https://gcc.gnu.org/ml/gcc-patches/2005-01/msg00813.html> applied to
GCC, a new trampoline is generated but GDB doesn't recognize it. This
patch is to teach GDB to understand this trampoline. See details
about this trampoline and the heuristics in the comments.
gdb:
2014-06-24 Yao Qi <yao@codesourcery.com>
* arm-tdep.c (arm_skip_bx_reg): New function.
(arm_skip_stub): Call arm_skip_bx_reg.
Move infrun.c declarations out of inferior.h to a new infrun.h file.
Tested by building on:
i686-w64-mingw32, enable-targets=all
x86_64-linux, enable-targets=all
i586-pc-msdosdjgpp
And also grepped the whole tree for each symbol moved to find where
infrun.h might be necessary.
gdb/
2014-05-22 Pedro Alves <palves@redhat.com>
* inferior.h (debug_infrun, debug_displaced, stop_on_solib_events)
(sync_execution, sched_multi, step_stop_if_no_debug, non_stop)
(disable_randomization, enum exec_direction_kind)
(execution_direction, stop_registers, start_remote)
(clear_proceed_status, proceed, resume, user_visible_resume_ptid)
(wait_for_inferior, normal_stop, get_last_target_status)
(prepare_for_detach, fetch_inferior_event, init_wait_for_inferior)
(insert_step_resume_breakpoint_at_sal)
(follow_inferior_reset_breakpoints, stepping_past_instruction_at)
(set_step_info, print_stop_event, signal_stop_state)
(signal_print_state, signal_pass_state, signal_stop_update)
(signal_print_update, signal_pass_update)
(update_signals_program_target, clear_exit_convenience_vars)
(displaced_step_dump_bytes, update_observer_mode)
(signal_catch_update, gdb_signal_from_command): Move
declarations ...
* infrun.h: ... to this new file.
* amd64-tdep.c: Include infrun.h.
* annotate.c: Include infrun.h.
* arch-utils.c: Include infrun.h.
* arm-linux-tdep.c: Include infrun.h.
* arm-tdep.c: Include infrun.h.
* break-catch-sig.c: Include infrun.h.
* breakpoint.c: Include infrun.h.
* common/agent.c: Include infrun.h instead of inferior.h.
* corelow.c: Include infrun.h.
* event-top.c: Include infrun.h.
* go32-nat.c: Include infrun.h.
* i386-tdep.c: Include infrun.h.
* inf-loop.c: Include infrun.h.
* infcall.c: Include infrun.h.
* infcmd.c: Include infrun.h.
* infrun.c: Include infrun.h.
* linux-fork.c: Include infrun.h.
* linux-nat.c: Include infrun.h.
* linux-thread-db.c: Include infrun.h.
* monitor.c: Include infrun.h.
* nto-tdep.c: Include infrun.h.
* procfs.c: Include infrun.h.
* record-btrace.c: Include infrun.h.
* record-full.c: Include infrun.h.
* remote-m32r-sdi.c: Include infrun.h.
* remote-mips.c: Include infrun.h.
* remote-notif.c: Include infrun.h.
* remote-sim.c: Include infrun.h.
* remote.c: Include infrun.h.
* reverse.c: Include infrun.h.
* rs6000-tdep.c: Include infrun.h.
* s390-linux-tdep.c: Include infrun.h.
* solib-irix.c: Include infrun.h.
* solib-osf.c: Include infrun.h.
* solib-svr4.c: Include infrun.h.
* target.c: Include infrun.h.
* top.c: Include infrun.h.
* windows-nat.c: Include infrun.h.
* mi/mi-interp.c: Include infrun.h.
* mi/mi-main.c: Include infrun.h.
* python/py-threadevent.c: Include infrun.h.
Prologue analysis for ldr.w and ldrd instruction obtains offset from
first two bytes that contains opcode of instruction. It should obtain
offset from next two bytes that actually contain operands.
* arm-tdep.c (thumb_analyze_prologue): Fix offset calculation for
ldr.w and ldrd instructions.
Signed-off-by: Taimoor Mirza <tmirza@codesourcery.com>
gdb/ChangeLog:
2014-01-15 Omair Javaid <omair.javaid@linaro.org>
* arm-tdep.c (enum arm_record_result): New enum.
(arm_record_unsupported_insn): New function.
(arm_record_coproc_data_proc): Removed.
(thumb2_record_ld_st_multiple): New function.
(thumb2_record_ld_st_dual_ex_tbb): New function.
(thumb2_record_data_proc_sreg_mimm): New function.
(thumb2_record_ps_dest_generic): New function.
(thumb2_record_branch_misc_cntrl): New function.
(thumb2_record_str_single_data): New function.
(thumb2_record_ld_mem_hints): New function.
(thumb2_record_ld_word): New function.
(thumb2_record_lmul_lmla_div): New function.
(thumb2_record_decode_insn_handler): New function.
(decode_insn): Add thumb32 instruction handlers.
This patch fixes thumb push instruction recording by replacing base
register from pc to sp.
gdb/ChangeLog:
2014-01-15 Omair Javaid <omair.javaid@linaro.org>
* arm-tdep.c (thumb_record_misc): Update to use sp as base
register for push instruction recording.
This patch corrects the register numbers and removes multiple loops in
recording procedure of instructions involving multiple registers.
gdb/ChangeLog:
2014-01-15 Omair Javaid <omair.javaid@linaro.org>
* arm-tdep.c (thumb_record_misc): Update to correct logical
error while recording ldm, ldmia and pop instructions.
Since as far back as the beginning of the sourceware repository
the ARM port has printed an error "Infinite loop detected" when
the next_pc calculated is the same as the current one, for example
when encountering a branch to the current PC address.
This causes the test gdb.base/random-signal.exp as the error message
is not expected. I have not been able to find a good reason for the
message to be here so remove it and let the test pass.
gdb/ChangeLog:
2013-11-20 Will Newton <will.newton@linaro.org>
* arm-tdep.c (arm_get_next_pc): Remove "Infinite loop detected"
error message.
This removes gdb_string.h. This patch is purely mechanical. I
created it by running the two commands:
git rm common/gdb_string.h
perl -pi -e's/"gdb_string.h"/<string.h>/;' *.[chyl] */*.[chyl]
2013-11-18 Tom Tromey <tromey@redhat.com>
* common/gdb_string.h: Remove.
* aarch64-tdep.c: Use string.h, not gdb_string.h.
* ada-exp.y: Use string.h, not gdb_string.h.
* ada-lang.c: Use string.h, not gdb_string.h.
* ada-lex.l: Use string.h, not gdb_string.h.
* ada-typeprint.c: Use string.h, not gdb_string.h.
* ada-valprint.c: Use string.h, not gdb_string.h.
* aix-thread.c: Use string.h, not gdb_string.h.
* alpha-linux-tdep.c: Use string.h, not gdb_string.h.
* alpha-mdebug-tdep.c: Use string.h, not gdb_string.h.
* alpha-nat.c: Use string.h, not gdb_string.h.
* alpha-osf1-tdep.c: Use string.h, not gdb_string.h.
* alpha-tdep.c: Use string.h, not gdb_string.h.
* alphanbsd-tdep.c: Use string.h, not gdb_string.h.
* amd64-dicos-tdep.c: Use string.h, not gdb_string.h.
* amd64-linux-nat.c: Use string.h, not gdb_string.h.
* amd64-linux-tdep.c: Use string.h, not gdb_string.h.
* amd64-nat.c: Use string.h, not gdb_string.h.
* amd64-sol2-tdep.c: Use string.h, not gdb_string.h.
* amd64fbsd-tdep.c: Use string.h, not gdb_string.h.
* amd64obsd-tdep.c: Use string.h, not gdb_string.h.
* arch-utils.c: Use string.h, not gdb_string.h.
* arm-linux-nat.c: Use string.h, not gdb_string.h.
* arm-linux-tdep.c: Use string.h, not gdb_string.h.
* arm-tdep.c: Use string.h, not gdb_string.h.
* arm-wince-tdep.c: Use string.h, not gdb_string.h.
* armbsd-tdep.c: Use string.h, not gdb_string.h.
* armnbsd-nat.c: Use string.h, not gdb_string.h.
* armnbsd-tdep.c: Use string.h, not gdb_string.h.
* armobsd-tdep.c: Use string.h, not gdb_string.h.
* avr-tdep.c: Use string.h, not gdb_string.h.
* ax-gdb.c: Use string.h, not gdb_string.h.
* ax-general.c: Use string.h, not gdb_string.h.
* bcache.c: Use string.h, not gdb_string.h.
* bfin-tdep.c: Use string.h, not gdb_string.h.
* breakpoint.c: Use string.h, not gdb_string.h.
* build-id.c: Use string.h, not gdb_string.h.
* buildsym.c: Use string.h, not gdb_string.h.
* c-exp.y: Use string.h, not gdb_string.h.
* c-lang.c: Use string.h, not gdb_string.h.
* c-typeprint.c: Use string.h, not gdb_string.h.
* c-valprint.c: Use string.h, not gdb_string.h.
* charset.c: Use string.h, not gdb_string.h.
* cli-out.c: Use string.h, not gdb_string.h.
* cli/cli-cmds.c: Use string.h, not gdb_string.h.
* cli/cli-decode.c: Use string.h, not gdb_string.h.
* cli/cli-dump.c: Use string.h, not gdb_string.h.
* cli/cli-interp.c: Use string.h, not gdb_string.h.
* cli/cli-logging.c: Use string.h, not gdb_string.h.
* cli/cli-script.c: Use string.h, not gdb_string.h.
* cli/cli-setshow.c: Use string.h, not gdb_string.h.
* cli/cli-utils.c: Use string.h, not gdb_string.h.
* coffread.c: Use string.h, not gdb_string.h.
* common/common-utils.c: Use string.h, not gdb_string.h.
* common/filestuff.c: Use string.h, not gdb_string.h.
* common/linux-procfs.c: Use string.h, not gdb_string.h.
* common/linux-ptrace.c: Use string.h, not gdb_string.h.
* common/signals.c: Use string.h, not gdb_string.h.
* common/vec.h: Use string.h, not gdb_string.h.
* core-regset.c: Use string.h, not gdb_string.h.
* corefile.c: Use string.h, not gdb_string.h.
* corelow.c: Use string.h, not gdb_string.h.
* cp-abi.c: Use string.h, not gdb_string.h.
* cp-support.c: Use string.h, not gdb_string.h.
* cp-valprint.c: Use string.h, not gdb_string.h.
* cris-tdep.c: Use string.h, not gdb_string.h.
* d-lang.c: Use string.h, not gdb_string.h.
* dbxread.c: Use string.h, not gdb_string.h.
* dcache.c: Use string.h, not gdb_string.h.
* demangle.c: Use string.h, not gdb_string.h.
* dicos-tdep.c: Use string.h, not gdb_string.h.
* disasm.c: Use string.h, not gdb_string.h.
* doublest.c: Use string.h, not gdb_string.h.
* dsrec.c: Use string.h, not gdb_string.h.
* dummy-frame.c: Use string.h, not gdb_string.h.
* dwarf2-frame.c: Use string.h, not gdb_string.h.
* dwarf2loc.c: Use string.h, not gdb_string.h.
* dwarf2read.c: Use string.h, not gdb_string.h.
* elfread.c: Use string.h, not gdb_string.h.
* environ.c: Use string.h, not gdb_string.h.
* eval.c: Use string.h, not gdb_string.h.
* event-loop.c: Use string.h, not gdb_string.h.
* exceptions.c: Use string.h, not gdb_string.h.
* exec.c: Use string.h, not gdb_string.h.
* expprint.c: Use string.h, not gdb_string.h.
* f-exp.y: Use string.h, not gdb_string.h.
* f-lang.c: Use string.h, not gdb_string.h.
* f-typeprint.c: Use string.h, not gdb_string.h.
* f-valprint.c: Use string.h, not gdb_string.h.
* fbsd-nat.c: Use string.h, not gdb_string.h.
* findcmd.c: Use string.h, not gdb_string.h.
* findvar.c: Use string.h, not gdb_string.h.
* fork-child.c: Use string.h, not gdb_string.h.
* frame.c: Use string.h, not gdb_string.h.
* frv-linux-tdep.c: Use string.h, not gdb_string.h.
* frv-tdep.c: Use string.h, not gdb_string.h.
* gdb.c: Use string.h, not gdb_string.h.
* gdb_bfd.c: Use string.h, not gdb_string.h.
* gdbarch.c: Use string.h, not gdb_string.h.
* gdbtypes.c: Use string.h, not gdb_string.h.
* gnu-nat.c: Use string.h, not gdb_string.h.
* gnu-v2-abi.c: Use string.h, not gdb_string.h.
* gnu-v3-abi.c: Use string.h, not gdb_string.h.
* go-exp.y: Use string.h, not gdb_string.h.
* go-lang.c: Use string.h, not gdb_string.h.
* go32-nat.c: Use string.h, not gdb_string.h.
* hppa-hpux-tdep.c: Use string.h, not gdb_string.h.
* hppa-linux-nat.c: Use string.h, not gdb_string.h.
* hppanbsd-tdep.c: Use string.h, not gdb_string.h.
* hppaobsd-tdep.c: Use string.h, not gdb_string.h.
* i386-cygwin-tdep.c: Use string.h, not gdb_string.h.
* i386-dicos-tdep.c: Use string.h, not gdb_string.h.
* i386-linux-nat.c: Use string.h, not gdb_string.h.
* i386-linux-tdep.c: Use string.h, not gdb_string.h.
* i386-nto-tdep.c: Use string.h, not gdb_string.h.
* i386-sol2-tdep.c: Use string.h, not gdb_string.h.
* i386-tdep.c: Use string.h, not gdb_string.h.
* i386bsd-tdep.c: Use string.h, not gdb_string.h.
* i386gnu-nat.c: Use string.h, not gdb_string.h.
* i386nbsd-tdep.c: Use string.h, not gdb_string.h.
* i386obsd-tdep.c: Use string.h, not gdb_string.h.
* i387-tdep.c: Use string.h, not gdb_string.h.
* ia64-libunwind-tdep.c: Use string.h, not gdb_string.h.
* ia64-linux-nat.c: Use string.h, not gdb_string.h.
* inf-child.c: Use string.h, not gdb_string.h.
* inf-ptrace.c: Use string.h, not gdb_string.h.
* inf-ttrace.c: Use string.h, not gdb_string.h.
* infcall.c: Use string.h, not gdb_string.h.
* infcmd.c: Use string.h, not gdb_string.h.
* inflow.c: Use string.h, not gdb_string.h.
* infrun.c: Use string.h, not gdb_string.h.
* interps.c: Use string.h, not gdb_string.h.
* iq2000-tdep.c: Use string.h, not gdb_string.h.
* irix5-nat.c: Use string.h, not gdb_string.h.
* jv-exp.y: Use string.h, not gdb_string.h.
* jv-lang.c: Use string.h, not gdb_string.h.
* jv-typeprint.c: Use string.h, not gdb_string.h.
* jv-valprint.c: Use string.h, not gdb_string.h.
* language.c: Use string.h, not gdb_string.h.
* linux-fork.c: Use string.h, not gdb_string.h.
* linux-nat.c: Use string.h, not gdb_string.h.
* lm32-tdep.c: Use string.h, not gdb_string.h.
* m2-exp.y: Use string.h, not gdb_string.h.
* m2-typeprint.c: Use string.h, not gdb_string.h.
* m32c-tdep.c: Use string.h, not gdb_string.h.
* m32r-linux-nat.c: Use string.h, not gdb_string.h.
* m32r-linux-tdep.c: Use string.h, not gdb_string.h.
* m32r-rom.c: Use string.h, not gdb_string.h.
* m32r-tdep.c: Use string.h, not gdb_string.h.
* m68hc11-tdep.c: Use string.h, not gdb_string.h.
* m68k-tdep.c: Use string.h, not gdb_string.h.
* m68kbsd-tdep.c: Use string.h, not gdb_string.h.
* m68klinux-nat.c: Use string.h, not gdb_string.h.
* m68klinux-tdep.c: Use string.h, not gdb_string.h.
* m88k-tdep.c: Use string.h, not gdb_string.h.
* macrocmd.c: Use string.h, not gdb_string.h.
* main.c: Use string.h, not gdb_string.h.
* mdebugread.c: Use string.h, not gdb_string.h.
* mem-break.c: Use string.h, not gdb_string.h.
* memattr.c: Use string.h, not gdb_string.h.
* memory-map.c: Use string.h, not gdb_string.h.
* mep-tdep.c: Use string.h, not gdb_string.h.
* mi/mi-cmd-break.c: Use string.h, not gdb_string.h.
* mi/mi-cmd-disas.c: Use string.h, not gdb_string.h.
* mi/mi-cmd-env.c: Use string.h, not gdb_string.h.
* mi/mi-cmd-stack.c: Use string.h, not gdb_string.h.
* mi/mi-cmd-var.c: Use string.h, not gdb_string.h.
* mi/mi-cmds.c: Use string.h, not gdb_string.h.
* mi/mi-console.c: Use string.h, not gdb_string.h.
* mi/mi-getopt.c: Use string.h, not gdb_string.h.
* mi/mi-interp.c: Use string.h, not gdb_string.h.
* mi/mi-main.c: Use string.h, not gdb_string.h.
* mi/mi-parse.c: Use string.h, not gdb_string.h.
* microblaze-rom.c: Use string.h, not gdb_string.h.
* microblaze-tdep.c: Use string.h, not gdb_string.h.
* mingw-hdep.c: Use string.h, not gdb_string.h.
* minidebug.c: Use string.h, not gdb_string.h.
* minsyms.c: Use string.h, not gdb_string.h.
* mips-irix-tdep.c: Use string.h, not gdb_string.h.
* mips-linux-tdep.c: Use string.h, not gdb_string.h.
* mips-tdep.c: Use string.h, not gdb_string.h.
* mips64obsd-tdep.c: Use string.h, not gdb_string.h.
* mipsnbsd-tdep.c: Use string.h, not gdb_string.h.
* mipsread.c: Use string.h, not gdb_string.h.
* mn10300-linux-tdep.c: Use string.h, not gdb_string.h.
* mn10300-tdep.c: Use string.h, not gdb_string.h.
* monitor.c: Use string.h, not gdb_string.h.
* moxie-tdep.c: Use string.h, not gdb_string.h.
* mt-tdep.c: Use string.h, not gdb_string.h.
* nbsd-tdep.c: Use string.h, not gdb_string.h.
* nios2-linux-tdep.c: Use string.h, not gdb_string.h.
* nto-procfs.c: Use string.h, not gdb_string.h.
* nto-tdep.c: Use string.h, not gdb_string.h.
* objc-lang.c: Use string.h, not gdb_string.h.
* objfiles.c: Use string.h, not gdb_string.h.
* opencl-lang.c: Use string.h, not gdb_string.h.
* osabi.c: Use string.h, not gdb_string.h.
* osdata.c: Use string.h, not gdb_string.h.
* p-exp.y: Use string.h, not gdb_string.h.
* p-lang.c: Use string.h, not gdb_string.h.
* p-typeprint.c: Use string.h, not gdb_string.h.
* parse.c: Use string.h, not gdb_string.h.
* posix-hdep.c: Use string.h, not gdb_string.h.
* ppc-linux-nat.c: Use string.h, not gdb_string.h.
* ppc-sysv-tdep.c: Use string.h, not gdb_string.h.
* ppcfbsd-tdep.c: Use string.h, not gdb_string.h.
* ppcnbsd-tdep.c: Use string.h, not gdb_string.h.
* ppcobsd-tdep.c: Use string.h, not gdb_string.h.
* printcmd.c: Use string.h, not gdb_string.h.
* procfs.c: Use string.h, not gdb_string.h.
* prologue-value.c: Use string.h, not gdb_string.h.
* python/py-auto-load.c: Use string.h, not gdb_string.h.
* python/py-gdb-readline.c: Use string.h, not gdb_string.h.
* ravenscar-thread.c: Use string.h, not gdb_string.h.
* regcache.c: Use string.h, not gdb_string.h.
* registry.c: Use string.h, not gdb_string.h.
* remote-fileio.c: Use string.h, not gdb_string.h.
* remote-m32r-sdi.c: Use string.h, not gdb_string.h.
* remote-mips.c: Use string.h, not gdb_string.h.
* remote-sim.c: Use string.h, not gdb_string.h.
* remote.c: Use string.h, not gdb_string.h.
* reverse.c: Use string.h, not gdb_string.h.
* rs6000-aix-tdep.c: Use string.h, not gdb_string.h.
* ser-base.c: Use string.h, not gdb_string.h.
* ser-go32.c: Use string.h, not gdb_string.h.
* ser-mingw.c: Use string.h, not gdb_string.h.
* ser-pipe.c: Use string.h, not gdb_string.h.
* ser-tcp.c: Use string.h, not gdb_string.h.
* ser-unix.c: Use string.h, not gdb_string.h.
* serial.c: Use string.h, not gdb_string.h.
* sh-tdep.c: Use string.h, not gdb_string.h.
* sh64-tdep.c: Use string.h, not gdb_string.h.
* shnbsd-tdep.c: Use string.h, not gdb_string.h.
* skip.c: Use string.h, not gdb_string.h.
* sol-thread.c: Use string.h, not gdb_string.h.
* solib-dsbt.c: Use string.h, not gdb_string.h.
* solib-frv.c: Use string.h, not gdb_string.h.
* solib-osf.c: Use string.h, not gdb_string.h.
* solib-spu.c: Use string.h, not gdb_string.h.
* solib-target.c: Use string.h, not gdb_string.h.
* solib.c: Use string.h, not gdb_string.h.
* somread.c: Use string.h, not gdb_string.h.
* source.c: Use string.h, not gdb_string.h.
* sparc-nat.c: Use string.h, not gdb_string.h.
* sparc-sol2-tdep.c: Use string.h, not gdb_string.h.
* sparc-tdep.c: Use string.h, not gdb_string.h.
* sparc64-tdep.c: Use string.h, not gdb_string.h.
* sparc64fbsd-tdep.c: Use string.h, not gdb_string.h.
* sparc64nbsd-tdep.c: Use string.h, not gdb_string.h.
* sparcnbsd-tdep.c: Use string.h, not gdb_string.h.
* spu-linux-nat.c: Use string.h, not gdb_string.h.
* spu-multiarch.c: Use string.h, not gdb_string.h.
* spu-tdep.c: Use string.h, not gdb_string.h.
* stabsread.c: Use string.h, not gdb_string.h.
* stack.c: Use string.h, not gdb_string.h.
* std-regs.c: Use string.h, not gdb_string.h.
* symfile.c: Use string.h, not gdb_string.h.
* symmisc.c: Use string.h, not gdb_string.h.
* symtab.c: Use string.h, not gdb_string.h.
* target.c: Use string.h, not gdb_string.h.
* thread.c: Use string.h, not gdb_string.h.
* tilegx-linux-nat.c: Use string.h, not gdb_string.h.
* tilegx-tdep.c: Use string.h, not gdb_string.h.
* top.c: Use string.h, not gdb_string.h.
* tracepoint.c: Use string.h, not gdb_string.h.
* tui/tui-command.c: Use string.h, not gdb_string.h.
* tui/tui-data.c: Use string.h, not gdb_string.h.
* tui/tui-disasm.c: Use string.h, not gdb_string.h.
* tui/tui-file.c: Use string.h, not gdb_string.h.
* tui/tui-layout.c: Use string.h, not gdb_string.h.
* tui/tui-out.c: Use string.h, not gdb_string.h.
* tui/tui-regs.c: Use string.h, not gdb_string.h.
* tui/tui-source.c: Use string.h, not gdb_string.h.
* tui/tui-stack.c: Use string.h, not gdb_string.h.
* tui/tui-win.c: Use string.h, not gdb_string.h.
* tui/tui-windata.c: Use string.h, not gdb_string.h.
* tui/tui-winsource.c: Use string.h, not gdb_string.h.
* typeprint.c: Use string.h, not gdb_string.h.
* ui-file.c: Use string.h, not gdb_string.h.
* ui-out.c: Use string.h, not gdb_string.h.
* user-regs.c: Use string.h, not gdb_string.h.
* utils.c: Use string.h, not gdb_string.h.
* v850-tdep.c: Use string.h, not gdb_string.h.
* valarith.c: Use string.h, not gdb_string.h.
* valops.c: Use string.h, not gdb_string.h.
* valprint.c: Use string.h, not gdb_string.h.
* value.c: Use string.h, not gdb_string.h.
* varobj.c: Use string.h, not gdb_string.h.
* vax-tdep.c: Use string.h, not gdb_string.h.
* vaxnbsd-tdep.c: Use string.h, not gdb_string.h.
* vaxobsd-tdep.c: Use string.h, not gdb_string.h.
* windows-nat.c: Use string.h, not gdb_string.h.
* xcoffread.c: Use string.h, not gdb_string.h.
* xml-support.c: Use string.h, not gdb_string.h.
* xstormy16-tdep.c: Use string.h, not gdb_string.h.
* xtensa-linux-nat.c: Use string.h, not gdb_string.h.
--enable-64-bit-bfd. Basically the issue happens when dealing with "bl"
instructions: GDB does branch destination calculation and (wrongly)
sign-extends the PC. Here is a piece of his original message explaining
the problem:
> next_pc = arm_get_next_pc (frame, get_frame_pc (frame));
>
> /* The Linux kernel offers some user-mode helpers in a high page. We can
> not read this page (as of 2.6.23), and even if we could then we couldn't
> set breakpoints in it, and even if we could then the atomic operations
> would fail when interrupted. They are all called as functions and return
> to the address in LR, so step to there instead. */
> if (next_pc > 0xffff0000)
> next_pc = get_frame_register_unsigned (frame, ARM_LR_REGNUM);
>
> arm_insert_single_step_breakpoint (gdbarch, aspace, next_pc);
>
> Unfortunately, branch destination addresses are SIGN EXTENDED to 64
> bits. So,
>
> (top-gdb) p/x next_pc
> $14 = 0xffffffffb6df2864
>
> Which triggers the next_pc = get_frame_register_unsigned(), and we
> cannot step into any branches because the destination PC is wrong.
Anyway, the fix is simple and Andrew himself provided it for us. It
took a while for me to figure out how to trigger the bug (in order to
write a testcase for it), but I finally made it.
The attached patch fixes the problem (by casting to `unsigned long'
instead of just `long'), and also includes a testcase to reproduce the
issue.
gdb/ChangeLog:
2013-04-22 Andrew Haley <aph@redhat.com>
* arm-tdep.c (BranchDest): Cast result as "unsigned long",
instead of "long".
gdb/testsuite/ChangeLog:
2013-04-22 Sergio Durigan Junior <sergiodj@redhat.com>
* gdb.arch/arm-bl-branch-dest.c: New file.
* gdb.arch/arm-bl-branch-dest.exp: Likewise.
-Wpointer-sign catches all these cases across the codebase that should
be using gdb_byte for raw target bytes. I think these are all
obvious, hence I've collapsed into a single patch.
gdb/
2013-04-19 Pedro Alves <palves@redhat.com>
* aarch64-tdep.c (aarch64_default_breakpoint): Change type to
gdb_byte[].
(aarch64_breakpoint_from_pc): Change return type to gdb_byte *.
* ada-lang.c (ada_value_assign): Use gdb_byte.
* alphanbsd-tdep.c (sigtramp_retcode): Change type to gdb_byte[].
(alphanbsd_sigtramp_offset): Use gdb_byte.
* arm-linux-tdep.c (arm_linux_arm_le_breakpoint)
(arm_linux_arm_be_breakpoint, eabi_linux_arm_le_breakpoint)
(eabi_linux_arm_be_breakpoint, arm_linux_thumb_be_breakpoint)
(arm_linux_thumb_le_breakpoint, arm_linux_thumb2_be_breakpoint)
(arm_linux_thumb2_le_breakpoint): Change type to gdb_byte[].
* arm-tdep.c (arm_stub_unwind_sniffer)
(arm_displaced_init_closure): Use gdb_byte.
(arm_default_arm_le_breakpoint, arm_default_arm_be_breakpoint)
(arm_default_thumb_le_breakpoint)
(arm_default_thumb_be_breakpoint): Change type to gdb_byte[].
* arm-tdep.h (struct gdbarch_tdep) <arm_breakpoint,
thumb_breakpoint, thumb2_breakpoint>: Change type to gdb_byte *.
* arm-wince-tdep.c (arm_wince_le_breakpoint)
(arm_wince_thumb_le_breakpoint): Change type to gdb_byte[].
* armnbsd-tdep.c (arm_nbsd_arm_le_breakpoint)
(arm_nbsd_arm_be_breakpoint, arm_nbsd_thumb_le_breakpoint)
(arm_nbsd_thumb_be_breakpoint): Change type to gdb_byte[].
* armobsd-tdep.c (arm_obsd_thumb_le_breakpoint)
(arm_obsd_thumb_be_breakpoint): Change type to gdb_byte[].
* cris-tdep.c (push_stack_item, cris_push_dummy_call)
(cris_store_return_value, cris_extract_return_value): Use
gdb_byte.
(constraint): Change type of parameter to char * from signed
char*. Use gdb_byte.
* dwarf2loc.c (read_pieced_value, write_pieced_value): Change type
of local buffer to gdb_byte *.
* dwarf2read.c (read_index_from_section): Use gdb_byte.
(create_dwp_hash_table): Change type of locals to gdb_byte *.
(add_address_entry): Change type of local buffer to gdb_byte[].
* frv-tdep.c (frv_adjust_breakpoint_address, find_func_descr)
(frv_push_dummy_call): Use gdb_byte.
* hppa-hpux-tdep.c (hppa_hpux_push_dummy_code)
(hppa_hpux_supply_ss_fpblock, hppa_hpux_supply_ss_wide)
(hppa_hpux_supply_save_state): Use gdb_byte.
* hppa-tdep.c (hppa32_push_dummy_call)
(hppa64_convert_code_addr_to_fptr): Use gdb_byte.
* ia64-tdep.c (extract_bit_field, replace_bit_field)
(slotN_contents, replace_slotN_contents): Change type of parameter
to gdb_byte *.
(fetch_instruction, ia64_pseudo_register_write)
(ia64_register_to_value, ia64_value_to_register)
(ia64_extract_return_value, ia64_store_return_value)
(ia64_push_dummy_call): Use gdb_byte.
* m32c-tdep.c (m32c_return_value): Remove cast.
* m68hc11-tdep.c (m68hc11_pseudo_register_write)
(m68hc11_push_dummy_call, m68hc11_store_return_value): Use
gdb_byte.
* mipsnbsd-tdep.c (mipsnbsd_get_longjmp_target): Use gdb_byte.
* mn10300-tdep.c (mn10300_store_return_value)
(mn10300_breakpoint_from_pc, mn10300_push_dummy_call): Use
gdb_byte.
* moxie-tdep.c (moxie_process_readu): Use gdb_byte.
(moxie_process_record): Remove casts.
* ppc-ravenscar-thread.c (supply_register_at_address)
(ppc_ravenscar_generic_store_registers): Use gdb_byte.
* ravenscar-thread.c (get_running_thread_id): Use gdb_byte.
* remote-m32r-sdi.c (m32r_fetch_register): Use gdb_byte.
* remote-mips.c (mips_xfer_memory): Use gdb_byte.
* remote.c (compare_sections_command): Use gdb_byte.
* score-tdep.c (score7_free_memblock): Change type of parameter to
gdb_byte *.
* sh-tdep.c (sh_justify_value_in_reg): Change return type to
gdb_byte *. Use gdb_byte.
(sh_push_dummy_call_fpu): Use gdb_byte.
(sh_extract_return_value_nofpu, sh_extract_return_value_fpu)
(sh_store_return_value_nofpu, sh_store_return_value_fpu)
(sh_register_convert_to_virtual, sh_register_convert_to_raw):
Change parameter type to 'gdb_byte *'. Use gdb_byte.
(sh_pseudo_register_read, sh_pseudo_register_write): Use gdb_byte.
* sh64-tdep.c (sh64_push_dummy_call): Use gdb_byte.
(sh64_store_return_value, sh64_register_convert_to_virtual):
Change parameter type to 'gdb_byte *'. Use gdb_byte.
(sh64_pseudo_register_write): Use gdb_byte.
* solib-darwin.c (darwin_current_sos): Add casts to 'gdb_byte *'.
* solib-irix.c (fetch_lm_info): Likewise. Use gdb_byte for byte
buffer.
(irix_current_sos): Use gdb_byte.
* solib-som.c (som_current_sos): Use gdb_byte.
* sparc-ravenscar-thread.c (supply_register_at_address)
(sparc_ravenscar_generic_store_registers): Use gdb_byte.
* spu-multiarch.c (spu_xfer_partial): Add cast to 'char *'.
* spu-tdep.c (spu_get_overlay_table): Use gdb_byte.
* tic6x-tdep.c (tic6x_breakpoint_from_pc): Change return type to
'gdb_byte *'.
* tic6x-tdep.h (struct gdbarch_tdep) <breakpoint>: Change type to
'gdb_byte *'.
* tracepoint.c (tfile_fetch_registers): Use gdb_byte.
* xstormy16-tdep.c (xstormy16_extract_return_value)
(xstormy16_store_return_value): Change parameter type to
'gdb_byte *'. Adjust.
(xstormy16_push_dummy_call): Use gdb_byte.
* xtensa-tdep.c (xtensa_scan_prologue, call0_ret)
(call0_analyze_prologue, execute_code): Use gdb_byte.
gdb/
* record-full.h, record-full.c (record_memory_query): Rename
to ...
(record_full_memory_query): ...this. Update all users.
(record_arch_list_add_reg): Rename to ...
(record_full_arch_list_add_reg): ...this. Update all users.
(record_arch_list_add_mem): Rename to ...
(record_full_arch_list_add_mem): ...this. Update all users.
(record_arch_list_add_end): Rename to ...
(record_full_arch_list_add_end): ...this. Update all users.
(record_gdb_operation_disable_set): Rename to ...
(record_full_gdb_operation_disable_set): ...this.
Update all users.
gdb_byte should be used for bytes from the program being debugged. We
have many places using char or unsigned char instead all over the
existing ports, and more ends up added over time due to copy/paste as
new code is based on old code.
I've greped the tree for "char buf[", and fixed all I found.
Tested by building with --enable-targets=all.
2013-03-01 Pedro Alves <palves@redhat.com>
Use gdb_byte for bytes from the program being debugged.
* arm-tdep.c (arm_store_return_value, arm_get_longjmp_target):
Change type of local 'buf' to gdb_byte.
* avr-tdep.c (avr_frame_prev_register, avr_push_dummy_call): Likewise.
* bfin-tdep.c (bfin_push_dummy_call): Likewise.
* cris-tdep.c (cris_sigcontext_addr)
(cris_sigtramp_frame_unwind_cache): Likewise.
* frv-linux-tdep.c (frv_linux_pc_in_sigtramp)
(frv_linux_sigcontext_reg_addr, frv_linux_sigtramp_frame_cache):
Likewise.
* frv-tdep.c (frv_pseudo_register_write, frv_analyze_prologue): Likewise.
* hppa-hpux-tdep.c (hppa32_hpux_find_global_pointer)
(hppa32_hpux_search_dummy_call_sequence)
(hppa_hpux_supply_save_state): Likewise.
* hppa-linux-tdep.c (insns_match_pattern)
(hppa_linux_find_global_pointer): Likewise.
* hppa-tdep.c (hppa_in_function_epilogue_p)
(skip_prologue_hard_way, hppa_frame_cache): Likewise.
* i386-nto-tdep.c (i386nto_sigcontext_addr): Likewise.
* i386fbsd-tdep.c (i386fbsd_supply_uthread)
(i386fbsd_collect_uthread): Likewise.
* ia64-hpux-tdep.c (ia64_hpux_push_dummy_code): Likewise.
* ia64-linux-tdep.c (ia64_linux_sigcontext_register_address): Likewise.
* ia64-tdep.c (examine_prologue, ia64_frame_cache)
(ia64_frame_prev_register, ia64_sigtramp_frame_cache)
(ia64_sigtramp_frame_prev_register, ia64_access_reg)
(ia64_access_rse_reg, ia64_libunwind_frame_this_id)
(ia64_libunwind_frame_prev_register)
(ia64_libunwind_sigtramp_frame_this_id)
(ia64_find_global_pointer_from_dynamic_section)
(find_extant_func_descr, find_func_descr, ia64_dummy_id)
(ia64_unwind_pc): Likewise.
* iq2000-tdep.c (iq2000_store_return_value): Likewise.
* m68hc11-tdep.c (m68hc11_push_dummy_call)
(m68hc11_extract_return_value): Likewise.
* m68klinux-nat.c (fetch_register, store_register): Likewise.
* mep-tdep.c (mep_pseudo_cr32_read, mep_pseudo_cr32_write)
(mep_get_insn, mep_push_dummy_call): Likewise.
* mips-linux-tdep.c (mips_linux_get_longjmp_target)
(mips_linux_in_dynsym_stub): Likewise.
* mn10300-tdep.c (mep_pseudo_cr32_write): Likewise.
* ppc-linux-nat.c (fetch_register, store_register): Likewise.
* regcache.c (dump_endian_bytes): Change type of parameter 'buf'
to gdb_byte.
* remote-mips.c (mips_set_register): Likewise.
* remote-sim.c (gdbsim_fetch_register): Likewise.
* score-tdep.c (score7_fetch_inst): Change type of parameter
'memblock' and local 'buf' to gdb_byte.
(score7_malloc_and_get_memblock): Change return type to gdb_byte.
Change type of local 'buf' to gdb_byte. Adjust.
(score7_adjust_memblock_ptr): Change type of parameter 'memblock'
to gdb_byte**.
(score7_analyze_prologue): Change type of 'memblock' and
'memblock_ptr' locals to gdb_byte*.
* sh64-tdep.c (sh64_extract_return_value)
(sh64_store_return_value): Change type of local 'buf' to gdb_byte.
* solib-darwin.c (darwin_current_sos, darwin_read_exec_load_addr):
* solib-pa64.c (pa64_solib_create_inferior_hook)
(pa64_open_symbol_file_object): Remove local 'buf'.
* solib-som.c (som_solib_create_inferior_hook, link_map_start)
(som_open_symbol_file_object): Likewise.
* solib-spu.c (spu_current_sos): Likewise.
* spu-linux-nat.c (spu_fetch_inferior_registers): Likewise.
* spu-multiarch.c (parse_spufs_run, spu_fetch_registers)
(spu_store_registers): Likewise.
* target.c (debug_print_register): Likewise.
* tic6x-tdep.c (tic6x_get_longjmp_target): Likewise.
* xstormy16-tdep.c (xstormy16_store_return_value)
(xstormy16_push_dummy_call, xstormy16_resolve_jmp_table_entry)
(xstormy16_find_jmp_table_entry): Likewise.
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.
2012-11-14 Daniel Jacobowitz <dan@codesourcery.com>
Yao Qi <yao@codesourcery.com>
* arm-tdep.c (arm_addr_bits_remove): Do not adjust the low
bit of EXC_RETURN.
(arm_m_exception_cache, arm_m_exception_this_id)
(arm_m_exception_prev_register, arm_m_exception_unwind_sniffer)
(arm_m_exception_unwind): New.
(arm_gdbarch_init): Register arm_m_exception_unwind.
* 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.
set_gdbarch_process_record.
Initialize `arm_swi_record' field.
* arm-tdep.c (arm_process_record): New function.
(deallocate_reg_mem): New function.
(decode_insn): New function.
(thumb_record_branch): New function.
(thumb_record_ldm_stm_swi(): New function.
(thumb_record_misc): New function.
(thumb_record_ld_st_stack): New function.
(thumb_record_ld_st_imm_offset): New function.
(thumb_record_ld_st_reg_offset(): New function.
(thumb_record_add_sub_cmp_mov): New function.
(thumb_record_shift_add_sub): New function.
(arm_record_coproc_data_proc): New function.
(arm_record_coproc): New function.
(arm_record_b_bl): New function.
(arm_record_ld_st_multiple): New function.
(arm_record_ld_st_reg_offset): New function.
(arm_record_ld_st_imm_offset): New function.
(arm_record_data_proc_imm): New function.
(arm_record_data_proc_misc_ld_str): New function.
(arm_record_extension_space): New function.
(arm_record_strx): New function.
(sbo_sbz): New function.
(struct insn_decode_record): New structure for arm insn record.
(REG_ALLOC): New macro for reg allocations.
(MEM_ALLOC): New macro for memory allocations.
* arm-tdep.h (struct gdbarch_tdep): New field 'arm_swi_record'
(arm_register_g_packet_guesses): New function.
(arm_gdbarch_init): Don't force a target description with
registers when the executable is detected as M-profile. Instead
set gdbarch->tdep->is_m. Register `g' packet guesses.
(_initialize_arm_tdep): Initialize the new target description.
* features/arm-with-m-fpa-layout.xml: New description.
* features/arm-with-m-fpa-layout.c: New, generated.
* arm-tdep.c (thumb_analyze_prologue): Always fallback on the SP
register when the frame can't be determined.
* arm-tdep.c (arm_analyze_prologue): Ditto.
gdb/testsuite/
* gdb.arch/thumb-prologue.c (switch_stack_to_same): New test function.
(switch_stack_to_other): New test function.
* gdb.arch/thumb-prologue.exp: New test cases.
* solib-svr4.c (open_symbol_file_object): Call do_cleanups on all
return paths. Defer final do_cleanups until last return.
* arm-tdep.c (arm_exidx_new_objfile): Make null cleanup after
early return.
* frame.c (frame_unwind_register): Throw an error if unwinding the
register failed.
* get_prev_frame_1 (get_prev_frame_1): Ask the unwinder if there's
an unwind stop reason.
(frame_stop_reason_string): Handle UNWIND_UNAVAILABLE.
* frame.h (enum unwind_stop_reason) <UNWIND_OUTERMOST,
UNWIND_UNAVAILABLE>: New.
* inline-frame.c (inline_frame_unwind): Install
default_frame_unwind_stop_reason.
* frame-unwind.c: Include "exceptions.h".
(frame_unwind_find_by_frame): Swallow NOT_AVAILABLE_ERROR errors.
(default_frame_unwind_stop_reason): New.
* frame-unwind.h (frame_unwind_stop_reason_ftype): New typedef.
(default_frame_unwind_stop_reason): Declare.
(struct frame_unwind) <stop_reason>: New function pointer.
* dummy-frame.c: Install default_frame_unwind_stop_reason.
* dwarf2-frame.c: Include exceptions.h.
(struct dwarf2_frame_cache) <unavailable_retaddr>: New field.
(dwarf2_frame_cache): Swallow NOT_AVAILABLE_ERROR errors when
computing the CFA. If such an error was thrown, set
unavailable_retaddr.
(dwarf2_frame_unwind_stop_reason): New.
(dwarf2_frame_this_id): Don't build a frame id if the CFA was
unavailable.
(dwarf2_frame_unwind): Install dwarf2_frame_unwind_stop_reason.
(dwarf2_signal_frame_unwind): Ditto.
* amd64-tdep.c: Include "exceptions.h".
(struct amd64_frame_cache): New field "base_p".
(amd64_init_frame_cache): Clear it.
(amd64_frame_cache_1): New, factored out from amd64_frame_cache.
Avoid reading registers with functions that throw if the register
is not necessary to compute the frame base.
(amd64_frame_cache): Reimplement wrapping amd64_frame_cache_1, and
swallowing NOT_AVAILABLE_ERROR.
(amd64_frame_unwind_stop_reason): New.
(amd64_frame_this_id): Don't build a frame id if the frame base
was unavailable.
(amd64_frame_unwind): Install amd64_frame_unwind_stop_reason.
(amd64_sigtramp_frame_cache): Swallow NOT_AVAILABLE_ERROR, and set
base_p if the frame base was computable.
(amd64_sigtramp_frame_unwind_stop_reason): New.
(amd64_sigtramp_frame_this_id): Don't build a frame id if the
frame base was unavailable.
(amd64_sigtramp_frame_unwind): Install
amd64_sigtramp_frame_unwind_stop_reason.
(amd64_epilogue_frame_cache): Swallow NOT_AVAILABLE_ERROR, and set
base_p if the frame base was computable.
(amd64_epilogue_frame_unwind_stop_reason): New.
(amd64_epilogue_frame_this_id): Don't build a frame id if the
frame base was unavailable.
(amd64_epilogue_frame_unwind): Install
amd64_epilogue_frame_unwind_stop_reason.
* i386-tdep.c: Include "exceptions.h".
(struct i386_frame_cache): New field "base_p".
(i386_init_frame_cache): Clear it.
(i386_frame_cache_1): New, factored out from amd64_frame_cache.
Avoid reading registers with functions that throw if the register
is not necessary to compute the frame base.
(i386_frame_cache): Reimplement wrapping amd64_frame_cache_1, and
swallowing NOT_AVAILABLE_ERROR.
(i386_frame_unwind_stop_reason): New.
(i386_frame_this_id): Don't build a frame id if the frame base was
unavailable.
(i386_frame_prev_register): Handle unavailable SP.
(i386_frame_unwind): Install i386_frame_unwind_stop_reason.
(i386_epilogue_frame_cache): Swallow NOT_AVAILABLE_ERROR, and set
base_p if the frame base was computable.
(i386_epilogue_frame_unwind_stop_reason): New.
(i386_epilogue_frame_this_id): Don't build a frame id if the frame
base was unavailable.
(i386_epilogue_frame_unwind): Install
i386_epilogue_frame_unwind_stop_reason.
(i386_sigtramp_frame_cache): Swallow NOT_AVAILABLE_ERROR, and set
base_p if the frame base was computable.
(i386_sigtramp_frame_unwind_stop_reason): New.
(i386_sigtramp_frame_this_id): Don't build a frame id if the frame
base was unavailable.
(i386_sigtramp_frame_unwind): Install
i386_sigtramp_frame_unwind_stop_reason.
* sentinel-frame.c (sentinel_frame_prev_register): Use the value
type's size, not the register's.
(sentinel_frame_unwind): Install default_frame_unwind_stop_reason.
* alpha-mdebug-tdep.c (alpha_mdebug_frame_unwind): Install
default_frame_unwind_stop_reason.
* alpha-tdep.c (alpha_sigtramp_frame_unwind)
(alpha_heuristic_frame_unwind): Ditto.
* amd64obsd-tdep.c (amd64obsd_trapframe_unwind): Ditto.
* arm-tdep.c (arm_prologue_unwind, arm_stub_unwind): Ditto.
* avr-tdep.c (avr_frame_unwind): Ditto.
* cris-tdep.c (cris_sigtramp_frame_unwind, cris_frame_unwind):
Ditto.
* frv-linux-tdep.c (frv_linux_sigtramp_frame_unwind): Ditto.
* frv-tdep.c (frv_frame_unwind): Ditto.
* h8300-tdep.c (h8300_frame_unwind): Ditto.
* hppa-hpux-tdep.c (hppa_hpux_sigtramp_frame_unwind): Ditto.
* hppa-linux-tdep.c (hppa_linux_sigtramp_frame_unwind): Ditto.
* hppa-tdep.c (hppa_frame_unwind, hppa_fallback_frame_unwind)
(hppa_stub_frame_unwind): Ditto.
* i386obsd-tdep.c (i386obsd_trapframe_unwind): Ditto.
* ia64-tdep.c (ia64_frame_unwind, ia64_sigtramp_frame_unwind)
(ia64_libunwind_frame_unwind)
(ia64_libunwind_sigtramp_frame_unwind): Ditto.
* iq2000-tdep.c (iq2000_frame_unwind): Ditto.
* lm32-tdep.c (lm32_frame_unwind): Ditto.
* m32c-tdep.c (m32c_unwind): Ditto.
* m32r-linux-tdep.c (m32r_linux_sigtramp_frame_unwind): Ditto.
* m32r-tdep.c (m32r_frame_unwind): Ditto.
* m68hc11-tdep.c (m68hc11_frame_unwind): Ditto.
* m68k-tdep.c (m68k_frame_unwind): Ditto.
* m68klinux-tdep.c (m68k_linux_sigtramp_frame_unwind): Ditto.
* m88k-tdep.c (m88k_frame_unwind): Ditto.
* mep-tdep.c (mep_frame_unwind): Ditto.
* microblaze-tdep.c (microblaze_frame_unwind): Ditto.
* mips-tdep.c (mips_insn16_frame_unwind, mips_insn32_frame_unwind)
(mips_stub_frame_unwind): Ditto.
* mn10300-tdep.c (mn10300_frame_unwind): Ditto.
* moxie-tdep.c (moxie_frame_unwind): Ditto.
* mt-tdep.c (mt_frame_unwind): Ditto.
* ppc-linux-tdep.c (ppu2spu_unwind): Ditto.
* ppcobsd-tdep.c (ppcobsd_sigtramp_frame_unwind): Ditto.
* rs6000-tdep.c (rs6000_frame_unwind): Ditto.
* s390-tdep.c (s390_frame_unwind, s390_stub_frame_unwind)
(s390_sigtramp_frame_unwind): Ditto.
* score-tdep.c (score_prologue_unwind): Ditto.
* sh-tdep.c (sh_frame_unwind): Ditto.
* sh64-tdep.c (sh64_frame_unwind): Ditto.
* sparc-sol2-tdep.c (sparc32_sol2_sigtramp_frame_unwind): Ditto.
* sparc-tdep.c (sparc32_frame_unwind): Ditto.
* sparc64-sol2-tdep.c (sparc64_sol2_sigtramp_frame_unwind): Ditto.
* sparc64-tdep.c (sparc64_frame_unwind): Ditto.
* sparc64fbsd-tdep.c (sparc64fbsd_sigtramp_frame_unwind): Ditto.
* sparc64nbsd-tdep.c (sparc64nbsd_sigcontext_frame_unwind): Ditto.
* sparc64obsd-tdep.c (sparc64obsd_frame_unwind)
(sparc64obsd_trapframe_unwind): Ditto.
* sparcnbsd-tdep.c (sparc32nbsd_sigcontext_frame_unwind): Ditto.
* sparcobsd-tdep.c (sparc32obsd_sigtramp_frame_unwind): Ditto.
* spu-tdep.c (spu_frame_unwind, spu2ppu_unwind): Ditto.
* v850-tdep.c (v850_frame_unwind): Ditto.
* vax-tdep.c (vax_frame_unwind): Ditto.
* vaxobsd-tdep.c (vaxobsd_sigtramp_frame_unwind): Ditto.
* xstormy16-tdep.c (frame_unwind xstormy16_frame_unwind): Ditto.
* xtensa-tdep.c (xtensa_unwind): 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.
* arm-tdep.h (struct displaced_step_closure): Add two new fields
is_thumb and insn_size.
* arm-tdep.c (displaced_read_reg): Adjust correct pipeline offset
on both ARM and Thumb mode.
(arm_process_displaced_insn): Set is_thumb and insn_size.
(arm_displaced_init_closure): Handle both 16-bit and 32-bit.
(arm_displaced_step_fixup): Likewise.
(arm_linux_restart_syscall_init): Handle both on-stack and in-kernel
versions of the trampoline. Handle Thumb vs. ARM addresses.
(arm_kernel_linux_restart_syscall_tramp_frame): New global.
(arm_linux_init_abi): Install it.
* arm-tdep.c (arm_psr_thumb_bit): Make global.
* arm-tdep.c (arm_psr_thumb_bit): Add prototype.
PR tdep/12352
* arm-tdep.c (copy_ldr_str_ldrb_strb): Replace PC with SP in
order to store PC value on stack instead of text section.
2011-02-15 Yao Qi <yao@codesourcery.com>
PR tdep/12352
* gdb.arch/arm-disp-step.S : New test for str instruction.
* gdb.arch/arm-disp-step.exp : Likewise
arguments. Skip in-prologue calls to glibc __aeabi_read_tp
implementation even if no symbols are available.
(thumb_analyze_prologue): Update call to skip_prologue_function.
(arm_analyze_prologue): Likewise.
(arm_prologue_this_id): Use frame PC if get_frame_func returns 0.
(arm_exidx_data_key): New static variable.
(struct arm_exidx_entry, arm_exidx_entry_s): New data types.
(struct arm_exidx_data): Likewise.
(arm_exidx_data_free): New function.
(arm_compare_exidx_entries): Likewise.
(arm_obj_section_from_vma): Likewise.
(arm_exidx_new_objfile): Likewise.
(arm_find_exidx_entry): Likewise.
(arm_exidx_fill_cache): Likewise.
(arm_exidx_unwind_sniffer): Likewise.
(arm_exidx_unwind): New global variable.
(arm_gdbarch_init): Append unwinder arm_exidx_unwind.
(_initialize_arm_tdep): Attach arm_exidx_new_objfile to new_objfile
observer. Register arm_exidx_data_key as objfile data.
(thumb_instruction_changes_pc): Likewise.
(thumb2_instruction_changes_pc): Likewise.
(thumb_analyze_prologue): Handle 32-bit Thumb instructions during
prologue parsing. Improved support for optimized code.
(thumb_scan_prologue): Do not reply on line-number information,
use same heuristics as arm_scan_prologue insead.
(skip_prologue_function): Accept functions
"__tls_get_addr" and "__aeabi_read_tp".
* arm-linux-tdep.c (arm_linux_sigreturn_return_addr): New.
(arm_linux_syscall_next_pc): New.
(arm_linux_copy_svc): Use arm_linux_sigreturn_return_addr instead.
(arm_linux_init_abi): Initialize syscall_next_pc.
* arm-tdep.c (thumb_get_next_pc_raw): Get next pc of SWI in Thumb mode.
(arm_get_next_pc_raw): Get next pc of SWI in ARM mode.
* arm-tdep.h (struct gdbarch_tdep): Add a function pointer syscall_next_pc.
Declare arm_frame_is_thumb.
(arm_psr_thumb_bit): New. Update all uses of CPSR_T to
call this function.
(arm_pc_is_thumb): Add a gdbarch argument. Update all callers.
Check is_m after force-mode.
(arm_gdbarch_init): Check the binary before the target description.
Add check for M profile attribute. If we have an M-profile device,
but no target register description, use arm-with-m. Recognize the
new org.gnu.gdb.arm.m-profile feature and its xpsr register.
(_initialize_arm_tdep): Call initialize_tdesc_arm_with_m.
* arm-tdep.h (XPSR_T): Define.
(struct gdbarch_tdep): Add is_m member.
* features/arm-m-profile.xml, features/arm-with-m.c,
features/arm-with-m.xml: New files.
doc/
* gdb.texinfo (ARM Features): Document
org.gnu.gdb.arm.m-profile.
(submask, bit, bits, sbits, BranchDest): Move higher in the file.
(thumb_analyze_prologue): Document return value. Recognize more
Thumb instructions, skippable calls, and some Thumb-2 instructions.
Add debug output.
(arm_skip_prologue): Remove call dummy check. Check the prologue
for non-GNU compilers.
(arm_instruction_changes_pc): New function.
(arm_analyze_prologue): New function, broken out from
arm_scan_prologue. Recognize more ARM instructions and skippable
calls. Update comments. Handle NULL cache. Return the address
of the first unrecognized instruction. Do not skip past other
instructions which change control flow. Add debug output.
(arm_scan_prologue): Use arm_analyze_prologue.
(ARM_PC_32): Delete.
(shifted_reg_val): Simplify ARM_PC_32 check.
* arm-tdep.c (arm_pc_is_thumb): Add heuristic that tries to get
the state right when single stepping.
(arm_get_next_pc_raw, thumb_get_next_pc_raw): New functions.
Get the next PC along with the instruction state.
(thumb_get_next_pc): Remove.
(arm_get_next_pc): Modified to use arm_get_next_pc_raw.
arm_pc_is_thumb.
(arm_pc_is_thumb): Use arm_find_mapping_symbol.
(extend_buffer_earlier): New function.
(MAX_IT_BLOCK_PREFIX, IT_SCAN_THRESHOLD): New constants.
(arm_adjust_breakpoint_address): New function.
(arm_gdbarch_init): Register arm_adjust_breakpoint_address.
testsuite/
* gdb.arch/thumb2-it.S (it_breakpoints): New function.
* gdb.arch/thumb2-it.exp (test_it_break): New function.
(Top level): Call it.
(arm_linux_thumb2_le_breakpoint): New constants.
(arm_linux_init_abi): Set thumb2_breakpoint and
thumb2_breakpoint_size.
* arm-tdep.c (thumb_insn_size, thumb_advance_itstate): New functions.
(thumb_get_next_pc): Add a comment. Rename IT to ITSTATE.
Implement support for single stepping through IT blocks if
a 32-bit Thumb breakpoint instruction is available.
(arm_breakpoint_from_pc): If a 32-bit Thumb breakpoint instruction
is available, use it when needed.
(arm_remote_breakpoint_from_pc): New function.
(arm_gdbarch_init): Register arm_remote_breakpoint_from_pc.
* arm-tdep.h (struct gdbarch_tdep): Correct thumb_breakpoint
comment. Add thumb2_breakpoint and thumb2_breakpoint_size.
gdbserver/
* linux-arm-low.c (thumb_breakpoint_len): Delete.
(thumb2_breakpoint): New.
(arm_breakpoint_at): Check for Thumb-2 breakpoints.
testsuite/
* gdb.arch/thumb2-it.S, gdb.arch/thumb2-it.exp: New files.
Yao Qi
Antoine Tremblay
Simon Marchi
Kyle Huey
Martin Galvan
Gary Benson
Pedro Alves
Tom Tromey
Luis Machado
Joel Brobecker
Jiong Wang
Terry Guo
Yao Qi
Doug Evans
Victor Kamensky
Omair Javaid
Taimoor Mirza
Will Newton
Maciej W. Rozycki
Sergio Durigan Junior
Markus Metzger
Joel Brobecker
Pierre Muller
Karthik Bhat
Joseph Myers
Matthew Gretton-Dann
Jonathan Larmour
Pawandeep Oza
Doug Evans
Jan Kratochvil
Ulrich Weigand
Meador Inge
Michael Snyder
Daniel Jacobowitz
Richard Earnshaw