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MIPS/GAS: Treat local jump relocs the same no matter if REL or RELA
Do not convert jump relocs against local MIPS16 or microMIPS symbols to refer to a section symbol instead even on RELA targets, as it makes it impossible for the linker to make a JAL to JALX conversion based on ISA symbol annotation, breaking regular and compressed MIPS interlinking. gas/ * config/tc-mips.c (mips_fix_adjustable): Also return 0 for jump relocations against MIPS16 or microMIPS symbols on RELA targets. * testsuite/gas/mips/jalx-local.d: New test. * testsuite/gas/mips/jalx-local-n32.d: New test. * testsuite/gas/mips/jalx-local-n64.d: New test. * testsuite/gas/mips/jalx-local.s: New test source. * testsuite/gas/mips/mips.exp: Run the new tests. ld/ * testsuite/ld-mips-elf/jalx-local.d: New test. * testsuite/ld-mips-elf/jalx-local-n32.d: New test. * testsuite/ld-mips-elf/jalx-local-n64.d: New test. * testsuite/ld-mips-elf/mips-elf.exp: Run the new tests.
This commit is contained in:
Maciej W. Rozycki
parent
4512dafa50
commit
44d3da2338
@ -1,3 +1,14 @@
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2016-05-24 Maciej W. Rozycki <macro@imgtec.com>
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* config/tc-mips.c (mips_fix_adjustable): Also return 0 for
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jump relocations against MIPS16 or microMIPS symbols on RELA
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targets.
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* testsuite/gas/mips/jalx-local.d: New test.
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* testsuite/gas/mips/jalx-local-n32.d: New test.
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* testsuite/gas/mips/jalx-local-n64.d: New test.
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* testsuite/gas/mips/jalx-local.s: New test source.
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* testsuite/gas/mips/mips.exp: Run the new tests.
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2016-05-24 Maciej W. Rozycki <macro@imgtec.com>
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* config/tc-mips.c (md_apply_fix)
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@ -17165,9 +17165,9 @@ mips_fix_adjustable (fixS *fixp)
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There is a further restriction:
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5. We cannot reduce jump relocations (R_MIPS_26, R_MIPS16_26 or
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R_MICROMIPS_26_S1) against MIPS16 or microMIPS symbols on
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targets with in-place addends; the relocation field cannot
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encode the low bit.
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R_MICROMIPS_26_S1) against MIPS16 or microMIPS symbols because
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we need to keep the MIPS16 or microMIPS symbol for the purpose
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of converting JAL to JALX instructions in the linker.
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For simplicity, we deal with (3)-(4) by not reducing _any_ relocation
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against a MIPS16 symbol. We deal with (5) by by not reducing any
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@ -17182,10 +17182,9 @@ mips_fix_adjustable (fixS *fixp)
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that we have for MIPS16 symbols. */
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if (fixp->fx_subsy == NULL
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&& (ELF_ST_IS_MIPS16 (S_GET_OTHER (fixp->fx_addsy))
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|| *symbol_get_tc (fixp->fx_addsy)
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|| (HAVE_IN_PLACE_ADDENDS
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&& ELF_ST_IS_MICROMIPS (S_GET_OTHER (fixp->fx_addsy))
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&& jmp_reloc_p (fixp->fx_r_type))))
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|| (ELF_ST_IS_MICROMIPS (S_GET_OTHER (fixp->fx_addsy))
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&& jmp_reloc_p (fixp->fx_r_type))
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|| *symbol_get_tc (fixp->fx_addsy)))
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return 0;
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return 1;
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29
gas/testsuite/gas/mips/jalx-local-n32.d
Normal file
29
gas/testsuite/gas/mips/jalx-local-n32.d
Normal file
@ -0,0 +1,29 @@
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#objdump: -dr --prefix-addresses --show-raw-insn
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#name: MIPS JALX local symbol relocation (n32)
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#as: -n32 -march=from-abi
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#source: jalx-local.s
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.*: +file format .*mips.*
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Disassembly of section \.text:
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\.\.\.
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[0-9a-f]+ <[^>]*> 0000 02d0 not zero,zero
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[0-9a-f]+ <[^>]*> f400 0000 jal 00000000 <foo-0x1000>
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[ ]*[0-9a-f]+: R_MICROMIPS_26_S1 \.text\+0x1020
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[0-9a-f]+ <[^>]*> 0000 02d0 not zero,zero
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[0-9a-f]+ <[^>]*> f000 0000 jalx 00000000 <foo-0x1000>
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[ ]*[0-9a-f]+: R_MICROMIPS_26_S1 \.text\+0x1020
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[0-9a-f]+ <[^>]*> 0000 02d0 not zero,zero
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[0-9a-f]+ <[^>]*> 001f 0f3c jr ra
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[0-9a-f]+ <[^>]*> 0000 02d0 not zero,zero
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[0-9a-f]+ <[^>]*> 0000 0000 nop
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[0-9a-f]+ <[^>]*> 00000027 nor zero,zero,zero
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[0-9a-f]+ <[^>]*> 0c000000 jal 00000000 <foo-0x1000>
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[ ]*[0-9a-f]+: R_MIPS_26 foo
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[0-9a-f]+ <[^>]*> 00000027 nor zero,zero,zero
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[0-9a-f]+ <[^>]*> 74000000 jalx 00000000 <foo-0x1000>
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[ ]*[0-9a-f]+: R_MIPS_26 foo
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[0-9a-f]+ <[^>]*> 00000027 nor zero,zero,zero
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[0-9a-f]+ <[^>]*> 03e00009 jalr zero,ra
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[0-9a-f]+ <[^>]*> 00000027 nor zero,zero,zero
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\.\.\.
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37
gas/testsuite/gas/mips/jalx-local-n64.d
Normal file
37
gas/testsuite/gas/mips/jalx-local-n64.d
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@ -0,0 +1,37 @@
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#objdump: -dr --prefix-addresses --show-raw-insn
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#name: MIPS JALX local symbol relocation (n64)
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#as: -64 -march=from-abi
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#source: jalx-local.s
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.*: +file format .*mips.*
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Disassembly of section \.text:
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\.\.\.
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[0-9a-f]+ <[^>]*> 0000 02d0 not zero,zero
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[0-9a-f]+ <[^>]*> f400 0000 jal 0000000000000000 <foo-0x1000>
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[ ]*[0-9a-f]+: R_MICROMIPS_26_S1 \.text\+0x1020
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[ ]*[0-9a-f]+: R_MIPS_NONE \*ABS\*\+0x1020
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[ ]*[0-9a-f]+: R_MIPS_NONE \*ABS\*\+0x1020
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[0-9a-f]+ <[^>]*> 0000 02d0 not zero,zero
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[0-9a-f]+ <[^>]*> f000 0000 jalx 0000000000000000 <foo-0x1000>
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[ ]*[0-9a-f]+: R_MICROMIPS_26_S1 \.text\+0x1020
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[ ]*[0-9a-f]+: R_MIPS_NONE \*ABS\*\+0x1020
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[ ]*[0-9a-f]+: R_MIPS_NONE \*ABS\*\+0x1020
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[0-9a-f]+ <[^>]*> 0000 02d0 not zero,zero
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[0-9a-f]+ <[^>]*> 001f 0f3c jr ra
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[0-9a-f]+ <[^>]*> 0000 02d0 not zero,zero
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[0-9a-f]+ <[^>]*> 0000 0000 nop
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[0-9a-f]+ <[^>]*> 00000027 nor zero,zero,zero
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[0-9a-f]+ <[^>]*> 0c000000 jal 0000000000000000 <foo-0x1000>
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[ ]*[0-9a-f]+: R_MIPS_26 foo
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[ ]*[0-9a-f]+: R_MIPS_NONE \*ABS\*
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[ ]*[0-9a-f]+: R_MIPS_NONE \*ABS\*
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[0-9a-f]+ <[^>]*> 00000027 nor zero,zero,zero
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[0-9a-f]+ <[^>]*> 74000000 jalx 0000000000000000 <foo-0x1000>
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[ ]*[0-9a-f]+: R_MIPS_26 foo
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[ ]*[0-9a-f]+: R_MIPS_NONE \*ABS\*
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[ ]*[0-9a-f]+: R_MIPS_NONE \*ABS\*
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[0-9a-f]+ <[^>]*> 00000027 nor zero,zero,zero
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[0-9a-f]+ <[^>]*> 03e00009 jalr zero,ra
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[0-9a-f]+ <[^>]*> 00000027 nor zero,zero,zero
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\.\.\.
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28
gas/testsuite/gas/mips/jalx-local.d
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28
gas/testsuite/gas/mips/jalx-local.d
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@ -0,0 +1,28 @@
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#objdump: -dr --prefix-addresses --show-raw-insn
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#name: MIPS JALX local symbol relocation
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#as: -32
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.*: +file format .*mips.*
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Disassembly of section \.text:
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\.\.\.
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[0-9a-f]+ <[^>]*> 0000 02d0 not zero,zero
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[0-9a-f]+ <[^>]*> f400 0810 jal 00001020 <bar>
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[ ]*[0-9a-f]+: R_MICROMIPS_26_S1 \.text
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[0-9a-f]+ <[^>]*> 0000 02d0 not zero,zero
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[0-9a-f]+ <[^>]*> f000 0408 jalx 00001020 <bar>
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[ ]*[0-9a-f]+: R_MICROMIPS_26_S1 \.text
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[0-9a-f]+ <[^>]*> 0000 02d0 not zero,zero
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[0-9a-f]+ <[^>]*> 001f 0f3c jr ra
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[0-9a-f]+ <[^>]*> 0000 02d0 not zero,zero
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[0-9a-f]+ <[^>]*> 0000 0000 nop
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[0-9a-f]+ <[^>]*> 00000027 nor zero,zero,zero
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[0-9a-f]+ <[^>]*> 0c000000 jal 00000000 <foo-0x1000>
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[ ]*[0-9a-f]+: R_MIPS_26 foo
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[0-9a-f]+ <[^>]*> 00000027 nor zero,zero,zero
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[0-9a-f]+ <[^>]*> 74000000 jalx 00000000 <foo-0x1000>
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[ ]*[0-9a-f]+: R_MIPS_26 foo
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[0-9a-f]+ <[^>]*> 00000027 nor zero,zero,zero
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[0-9a-f]+ <[^>]*> 03e00009 jalr zero,ra
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[0-9a-f]+ <[^>]*> 00000027 nor zero,zero,zero
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\.\.\.
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33
gas/testsuite/gas/mips/jalx-local.s
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33
gas/testsuite/gas/mips/jalx-local.s
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@ -0,0 +1,33 @@
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.text
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.set noreorder
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.space 0x1000
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.align 4
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.set micromips
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.ent foo
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foo:
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nor $0, $0
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jal bar
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nor $0, $0
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jalx bar
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nor $0, $0
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jalr $0, $ra
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nor $0, $0
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.end foo
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.align 4
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.set nomicromips
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.ent bar
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bar:
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nor $0, $0
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jal foo
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nor $0, $0
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jalx foo
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nor $0, $0
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jalr $0, $ra
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nor $0, $0
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.end bar
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# Force some (non-delay-slot) zero bytes, to make 'objdump' print ...
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.align 4, 0
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.space 16
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@ -796,11 +796,14 @@ if { [istarget mips*-*-vxworks*] } {
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run_dump_test "mips-jalx-2"
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run_dump_test "jalx-imm"
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run_dump_test "jalx-addend"
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run_dump_test "jalx-local"
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if $has_newabi {
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run_dump_test "jalx-imm-n32"
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run_dump_test "jalx-addend-n32"
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run_dump_test "jalx-local-n32"
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run_dump_test "jalx-imm-n64"
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run_dump_test "jalx-addend-n64"
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run_dump_test "jalx-local-n64"
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}
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# Check MIPS16 HI16/LO16 relocations
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run_dump_test "mips16-hilo"
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@ -1,3 +1,10 @@
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2016-05-24 Maciej W. Rozycki <macro@imgtec.com>
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* testsuite/ld-mips-elf/jalx-local.d: New test.
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* testsuite/ld-mips-elf/jalx-local-n32.d: New test.
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* testsuite/ld-mips-elf/jalx-local-n64.d: New test.
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* testsuite/ld-mips-elf/mips-elf.exp: Run the new tests.
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2016-05-23 Kuba Sejdak <jakub.sejdak@phoesys.com>
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* Makefile.am: Add earmelf_phoenix.c.
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6
ld/testsuite/ld-mips-elf/jalx-local-n32.d
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6
ld/testsuite/ld-mips-elf/jalx-local-n32.d
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@ -0,0 +1,6 @@
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#name: MIPS JALX to local symbol (n32)
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#source: ../../../gas/testsuite/gas/mips/jalx-local.s
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#as: -EB -n32 -march=from-abi
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#ld: -EB -Ttext 0x1c000000 -e 0x1c000000
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#objdump: -dr --prefix-addresses --show-raw-insn
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#dump: jalx-local.d
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6
ld/testsuite/ld-mips-elf/jalx-local-n64.d
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6
ld/testsuite/ld-mips-elf/jalx-local-n64.d
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@ -0,0 +1,6 @@
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#name: MIPS JALX to local symbol (n64)
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#source: ../../../gas/testsuite/gas/mips/jalx-local.s
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#as: -EB -64 -march=from-abi
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#ld: -EB -Ttext 0x1c000000 -e 0x1c000000
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#objdump: -dr --prefix-addresses --show-raw-insn
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#dump: jalx-local.d
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26
ld/testsuite/ld-mips-elf/jalx-local.d
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26
ld/testsuite/ld-mips-elf/jalx-local.d
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@ -0,0 +1,26 @@
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#name: MIPS JALX to local symbol
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#source: ../../../gas/testsuite/gas/mips/jalx-local.s
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#as: -EB -32
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#ld: -EB -Ttext 0x1c000000 -e 0x1c000000
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#objdump: -dr --prefix-addresses --show-raw-insn
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.*: +file format .*mips.*
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Disassembly of section \.text:
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\.\.\.
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[0-9a-f]+ <[^>]*> 0000 02d0 not zero,zero
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[0-9a-f]+ <[^>]*> f300 0408 jalx 0*1c001020 <.*>
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[0-9a-f]+ <[^>]*> 0000 02d0 not zero,zero
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[0-9a-f]+ <[^>]*> f300 0408 jalx 0*1c001020 <.*>
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[0-9a-f]+ <[^>]*> 0000 02d0 not zero,zero
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[0-9a-f]+ <[^>]*> 001f 0f3c jr ra
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[0-9a-f]+ <[^>]*> 0000 02d0 not zero,zero
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[0-9a-f]+ <[^>]*> 0000 0000 nop
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[0-9a-f]+ <[^>]*> 00000027 nor zero,zero,zero
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[0-9a-f]+ <[^>]*> 77000400 jalx 0*1c001000 <.*>
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[0-9a-f]+ <[^>]*> 00000027 nor zero,zero,zero
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[0-9a-f]+ <[^>]*> 77000400 jalx 0*1c001000 <.*>
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[0-9a-f]+ <[^>]*> 00000027 nor zero,zero,zero
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[0-9a-f]+ <[^>]*> 03e00009 jalr zero,ra
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[0-9a-f]+ <[^>]*> 00000027 nor zero,zero,zero
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\.\.\.
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@ -169,9 +169,12 @@ if { $linux_gnu } {
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}
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run_dump_test "jalx-addend" [list [list ld $abi_ldflags(o32)]]
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run_dump_test "jalx-local" [list [list ld $abi_ldflags(o32)]]
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if $has_newabi {
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run_dump_test "jalx-addend-n32" [list [list ld $abi_ldflags(n32)]]
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run_dump_test "jalx-local-n32" [list [list ld $abi_ldflags(n32)]]
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run_dump_test "jalx-addend-n64" [list [list ld $abi_ldflags(n64)]]
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run_dump_test "jalx-local-n64" [list [list ld $abi_ldflags(n64)]]
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}
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# Test multi-got link. We only do this on GNU/Linux because it requires
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