gas/
* config/tc-mips.c (append_insn): Make sure DWARF-2 location information is properly adjusted for branches that get swapped. gas/testsuite/ * gas/mips/loc-swap.d: New test case for DWARF-2 location with branch swapping. * gas/mips/loc-swap-dis.d: Likewise. * gas/mips/mips16@loc-swap.d: Likewise, MIPS16 version. * gas/mips/mips16@loc-swap-dis.d: Likewise. * gas/mips/loc-swap.s: Source for the new tests. * gas/mips/mips.exp: Run the new tests.
This commit is contained in:
Maciej W. Rozycki
parent
7475b06c20
commit
e3a82c8e75
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@ -1,3 +1,8 @@
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2011-07-04 Maciej W. Rozycki <macro@codesourcery.com>
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* config/tc-mips.c (append_insn): Make sure DWARF-2 location
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information is properly adjusted for branches that get swapped.
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2011-07-03 Samuel Thibault <samuel.thibault@gnu.org>
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Thomas Schwinge <thomas@schwinge.name>
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@ -3454,10 +3454,20 @@ append_insn (struct mips_cl_insn *ip, expressionS *address_expr,
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#ifdef OBJ_ELF
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/* The value passed to dwarf2_emit_insn is the distance between
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the beginning of the current instruction and the address that
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should be recorded in the debug tables. For MIPS16 debug info
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we want to use ISA-encoded addresses, so we pass -1 for an
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address higher by one than the current. */
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dwarf2_emit_insn (mips_opts.mips16 ? -1 : 0);
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should be recorded in the debug tables. This is normally the
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current address.
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For MIPS16 debug info we want to use ISA-encoded addresses,
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so we use -1 for an address higher by one than the current one.
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If the instruction produced is a branch that we will swap with
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the preceding instruction, then we add the displacement by which
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the branch will be moved backwards. This is more appropriate
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and for MIPS16 code also prevents a debugger from placing a
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breakpoint in the middle of the branch (and corrupting code if
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software breakpoints are used). */
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dwarf2_emit_insn ((mips_opts.mips16 ? -1 : 0)
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+ (method == APPEND_SWAP ? insn_length (history) : 0));
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#endif
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if (address_expr
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@ -1,3 +1,13 @@
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2011-07-04 Maciej W. Rozycki <macro@codesourcery.com>
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* gas/mips/loc-swap.d: New test case for DWARF-2 location with
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branch swapping.
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* gas/mips/loc-swap-dis.d: Likewise.
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* gas/mips/mips16@loc-swap.d: Likewise, MIPS16 version.
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* gas/mips/mips16@loc-swap-dis.d: Likewise.
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* gas/mips/loc-swap.s: Source for the new tests.
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* gas/mips/mips.exp: Run the new tests.
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2011-06-30 H.J. Lu <hongjiu.lu@intel.com>
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AVX Programming Reference (June, 2011)
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@ -0,0 +1,34 @@
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#objdump: -dr --prefix-addresses --show-raw-insn
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#name: MIPS DWARF-2 location information with branch swapping disassembly
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#as: -32
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#source: loc-swap.s
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# Check branch swapping with DWARF-2 location information.
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.*: +file format .*mips.*
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Disassembly of section \.text:
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[0-9a-f]+ <[^>]*> 02002021 move a0,s0
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[0-9a-f]+ <[^>]*> 00800008 jr a0
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[0-9a-f]+ <[^>]*> 00000000 nop
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[0-9a-f]+ <[^>]*> 00800008 jr a0
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[0-9a-f]+ <[^>]*> 0200f821 move ra,s0
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[0-9a-f]+ <[^>]*> 03e00008 jr ra
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[0-9a-f]+ <[^>]*> 02002021 move a0,s0
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[0-9a-f]+ <[^>]*> 0200f821 move ra,s0
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[0-9a-f]+ <[^>]*> 03e00008 jr ra
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[0-9a-f]+ <[^>]*> 00000000 nop
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[0-9a-f]+ <[^>]*> 02002021 move a0,s0
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[0-9a-f]+ <[^>]*> 0080f809 jalr a0
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[0-9a-f]+ <[^>]*> 00000000 nop
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[0-9a-f]+ <[^>]*> 0200f821 move ra,s0
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[0-9a-f]+ <[^>]*> 0080f809 jalr a0
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[0-9a-f]+ <[^>]*> 00000000 nop
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[0-9a-f]+ <[^>]*> 0c000000 jal 0+0000 <foo>
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[ ]*[0-9a-f]+: R_MIPS_26 bar
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[0-9a-f]+ <[^>]*> 02002021 move a0,s0
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[0-9a-f]+ <[^>]*> 0200f821 move ra,s0
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[0-9a-f]+ <[^>]*> 0c000000 jal 0+0000 <foo>
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[ ]*[0-9a-f]+: R_MIPS_26 bar
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[0-9a-f]+ <[^>]*> 00000000 nop
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\.\.\.
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@ -0,0 +1,61 @@
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#PROG: readelf
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#readelf: -wl
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#name: MIPS DWARF-2 location information with branch swapping
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#as: -32
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#source: loc-swap.s
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# Verify that DWARF-2 location information for instructions reordered
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# into a branch delay slot is updated to point to the branch instead.
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Raw dump of debug contents of section \.debug_line:
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Offset: 0x0
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Length: 67
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DWARF Version: 2
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Prologue Length: 33
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Minimum Instruction Length: 1
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Initial value of 'is_stmt': 1
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Line Base: -5
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Line Range: 14
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Opcode Base: 13
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Opcodes:
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Opcode 1 has 0 args
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Opcode 2 has 1 args
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Opcode 3 has 1 args
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Opcode 4 has 1 args
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Opcode 5 has 1 args
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Opcode 6 has 0 args
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Opcode 7 has 0 args
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Opcode 8 has 0 args
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Opcode 9 has 1 args
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Opcode 10 has 0 args
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Opcode 11 has 0 args
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Opcode 12 has 1 args
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The Directory Table is empty\.
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The File Name Table:
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Entry Dir Time Size Name
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1 0 0 0 loc-swap\.s
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Line Number Statements:
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Extended opcode 2: set Address to 0x0
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Special opcode 11: advance Address by 0 to 0x0 and Line by 6 to 7
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Special opcode 63: advance Address by 4 to 0x4 and Line by 2 to 9
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Special opcode 120: advance Address by 8 to 0xc and Line by 3 to 12
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Special opcode 7: advance Address by 0 to 0xc and Line by 2 to 14
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Special opcode 120: advance Address by 8 to 0x14 and Line by 3 to 17
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Special opcode 7: advance Address by 0 to 0x14 and Line by 2 to 19
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Special opcode 120: advance Address by 8 to 0x1c and Line by 3 to 22
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Special opcode 63: advance Address by 4 to 0x20 and Line by 2 to 24
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Special opcode 120: advance Address by 8 to 0x28 and Line by 3 to 27
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Special opcode 63: advance Address by 4 to 0x2c and Line by 2 to 29
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Special opcode 120: advance Address by 8 to 0x34 and Line by 3 to 32
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Special opcode 63: advance Address by 4 to 0x38 and Line by 2 to 34
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Special opcode 120: advance Address by 8 to 0x40 and Line by 3 to 37
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Special opcode 7: advance Address by 0 to 0x40 and Line by 2 to 39
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Special opcode 120: advance Address by 8 to 0x48 and Line by 3 to 42
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Special opcode 63: advance Address by 4 to 0x4c and Line by 2 to 44
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Advance PC by 24 to 0x64
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Extended opcode 1: End of Sequence
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@ -854,6 +854,10 @@ if { [istarget mips*-*-vxworks*] } {
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[mips_arch_list_matching mips1]
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run_dump_test_arches "branch-misc-4-64" \
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[mips_arch_list_matching mips3]
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run_dump_test_arches "loc-swap" [mips_arch_list_all]
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run_dump_test_arches "loc-swap-dis" \
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[mips_arch_list_all]
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}
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if $has_newabi {
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@ -0,0 +1,35 @@
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#objdump: -dr --prefix-addresses --show-raw-insn
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#name: MIPS DWARF-2 location information with branch swapping disassembly
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#as: -32
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#source: loc-swap.s
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# Check branch swapping with DWARF-2 location information (MIPS16).
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.*: +file format .*mips.*
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Disassembly of section \.text:
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[0-9a-f]+ <[^>]*> 6790 move a0,s0
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[0-9a-f]+ <[^>]*> ec00 jr a0
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[0-9a-f]+ <[^>]*> 6500 nop
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[0-9a-f]+ <[^>]*> ec00 jr a0
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[0-9a-f]+ <[^>]*> 65f8 move ra,s0
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[0-9a-f]+ <[^>]*> e820 jr ra
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[0-9a-f]+ <[^>]*> 6790 move a0,s0
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[0-9a-f]+ <[^>]*> 65f8 move ra,s0
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[0-9a-f]+ <[^>]*> e820 jr ra
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[0-9a-f]+ <[^>]*> 6500 nop
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[0-9a-f]+ <[^>]*> 6790 move a0,s0
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[0-9a-f]+ <[^>]*> ec40 jalr a0
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[0-9a-f]+ <[^>]*> 6500 nop
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[0-9a-f]+ <[^>]*> 65f8 move ra,s0
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[0-9a-f]+ <[^>]*> ec40 jalr a0
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[0-9a-f]+ <[^>]*> 6500 nop
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[0-9a-f]+ <[^>]*> 1800 0000 jal 0+0000 <foo>
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[ ]*[0-9a-f]+: R_MIPS16_26 bar
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[0-9a-f]+ <[^>]*> 6790 move a0,s0
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[0-9a-f]+ <[^>]*> 65f8 move ra,s0
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[0-9a-f]+ <[^>]*> 1800 0000 jal 0+0000 <foo>
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[ ]*[0-9a-f]+: R_MIPS16_26 bar
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[0-9a-f]+ <[^>]*> 6500 nop
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[0-9a-f]+ <[^>]*> 6500 nop
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\.\.\.
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@ -0,0 +1,61 @@
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#PROG: readelf
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#readelf: -wl
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#name: MIPS DWARF-2 location information with branch swapping
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#as: -32
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#source: loc-swap.s
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# Verify that DWARF-2 location information for instructions reordered
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# into a branch delay slot is updated to point to the branch instead.
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Raw dump of debug contents of section \.debug_line:
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Offset: 0x0
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Length: 67
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DWARF Version: 2
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Prologue Length: 33
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Minimum Instruction Length: 1
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Initial value of 'is_stmt': 1
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Line Base: -5
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Line Range: 14
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Opcode Base: 13
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Opcodes:
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Opcode 1 has 0 args
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Opcode 2 has 1 args
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Opcode 3 has 1 args
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Opcode 4 has 1 args
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Opcode 5 has 1 args
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Opcode 6 has 0 args
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Opcode 7 has 0 args
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Opcode 8 has 0 args
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Opcode 9 has 1 args
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Opcode 10 has 0 args
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Opcode 11 has 0 args
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Opcode 12 has 1 args
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The Directory Table is empty\.
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The File Name Table:
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Entry Dir Time Size Name
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1 0 0 0 loc-swap\.s
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Line Number Statements:
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Extended opcode 2: set Address to 0x1
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Special opcode 11: advance Address by 0 to 0x1 and Line by 6 to 7
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Special opcode 35: advance Address by 2 to 0x3 and Line by 2 to 9
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Special opcode 64: advance Address by 4 to 0x7 and Line by 3 to 12
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Special opcode 7: advance Address by 0 to 0x7 and Line by 2 to 14
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Special opcode 64: advance Address by 4 to 0xb and Line by 3 to 17
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Special opcode 7: advance Address by 0 to 0xb and Line by 2 to 19
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Special opcode 64: advance Address by 4 to 0xf and Line by 3 to 22
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Special opcode 35: advance Address by 2 to 0x11 and Line by 2 to 24
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Special opcode 64: advance Address by 4 to 0x15 and Line by 3 to 27
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Special opcode 35: advance Address by 2 to 0x17 and Line by 2 to 29
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Special opcode 64: advance Address by 4 to 0x1b and Line by 3 to 32
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Special opcode 35: advance Address by 2 to 0x1d and Line by 2 to 34
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Special opcode 64: advance Address by 4 to 0x21 and Line by 3 to 37
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Special opcode 7: advance Address by 0 to 0x21 and Line by 2 to 39
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Special opcode 92: advance Address by 6 to 0x27 and Line by 3 to 42
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Special opcode 35: advance Address by 2 to 0x29 and Line by 2 to 44
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Advance PC by 23 to 0x40
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Extended opcode 1: End of Sequence
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