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[mips] Correct jal expansion for local symbols in .local directives.
This patch corrects the behaviour of code such as: .local foo jal foo foo: to use the correct jal expansion when writing ELF files. Patch by: Daniel Sanders Reviewers: zoran.jovanovic, seanbruno, vkalintiris Differential Revision: https://reviews.llvm.org/D24722 llvm-svn: 287918
This commit is contained in:
parent
af38594037
commit
9f9cfefda4
@ -1806,7 +1806,8 @@ bool MipsAsmParser::processInstruction(MCInst &Inst, SMLoc IDLoc,
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// FIXME: Add support for label+offset operands (currently causes an error).
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// FIXME: Add support for label+offset operands (currently causes an error).
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// FIXME: Add support for forward-declared local symbols.
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// FIXME: Add support for forward-declared local symbols.
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// FIXME: Add expansion for when the LargeGOT option is enabled.
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// FIXME: Add expansion for when the LargeGOT option is enabled.
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if (JalSym->isInSection() || JalSym->isTemporary()) {
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if (JalSym->isInSection() || JalSym->isTemporary() ||
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(JalSym->isELF() && cast<MCSymbolELF>(JalSym)->getBinding() == ELF::STB_LOCAL)) {
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if (isABI_O32()) {
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if (isABI_O32()) {
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// If it's a local symbol and the O32 ABI is being used, we expand to:
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// If it's a local symbol and the O32 ABI is being used, we expand to:
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// lw $25, 0($gp)
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// lw $25, 0($gp)
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@ -16,6 +16,18 @@
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# RUN: llvm-mc %s -arch=mips64 -mcpu=mips64 -target-abi n64 -mattr=micromips -show-encoding |\
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# RUN: llvm-mc %s -arch=mips64 -mcpu=mips64 -target-abi n64 -mattr=micromips -show-encoding |\
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# RUN: FileCheck %s -check-prefixes=ALL,MICROMIPS,N64-MICROMIPS
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# RUN: FileCheck %s -check-prefixes=ALL,MICROMIPS,N64-MICROMIPS
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# Repeat the tests but using ELF output. An initial version of this patch did
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# this as the output different depending on whether it went through
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# MCAsmStreamer or MCELFStreamer. This ensures that the assembly expansion and
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# direct objection emission match.
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# RUN: llvm-mc %s -arch=mips -mcpu=mips32 -filetype=obj | \
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# RUN: llvm-objdump -d -r - | FileCheck %s -check-prefixes=ELF-O32
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# RUN: llvm-mc %s -arch=mips64 -mcpu=mips64 -target-abi n32 -filetype=obj | \
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# RUN: llvm-objdump -d -r - | FileCheck %s -check-prefixes=ELF-N32
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# RUN: llvm-mc %s -arch=mips64 -mcpu=mips64 -target-abi n64 -filetype=obj | \
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# RUN: llvm-objdump -d -r - | FileCheck %s -check-prefixes=ELF-N64
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.weak weak_label
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.weak weak_label
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.text
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.text
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@ -29,38 +41,28 @@ local_label:
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jal local_label
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jal local_label
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nop
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nop
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jal weak_label
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nop
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jal global_label
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nop
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jal .text
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nop
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# local labels ($tmp symbols)
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jal 1f
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nop
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.end local_label
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1:
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nop
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add $8, $8, $8
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nop
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# Expanding "jal local_label":
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# Expanding "jal local_label":
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# O32: lw $25, %got(local_label)($gp) # encoding: [0x8f,0x99,A,A]
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# O32: lw $25, %got(local_label)($gp) # encoding: [0x8f,0x99,A,A]
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# O32: # fixup A - offset: 0, value: %got(local_label), kind: fixup_Mips_GOT
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# O32: # fixup A - offset: 0, value: %got(local_label), kind: fixup_Mips_GOT
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# O32: addiu $25, $25, %lo(local_label) # encoding: [0x27,0x39,A,A]
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# O32: addiu $25, $25, %lo(local_label) # encoding: [0x27,0x39,A,A]
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# O32: # fixup A - offset: 0, value: %lo(local_label), kind: fixup_Mips_LO16
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# O32: # fixup A - offset: 0, value: %lo(local_label), kind: fixup_Mips_LO16
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# ELF-O32: 8f 99 00 00 lw $25, 0($gp)
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# ELF-O32-NEXT: R_MIPS_GOT16 .text
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# ELF-O32-NEXT: 27 39 00 00 addiu $25, $25, 0
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# ELF-O32-NEXT: R_MIPS_LO16 .text
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# N32: lw $25, %got_disp(local_label)($gp) # encoding: [0x8f,0x99,A,A]
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# N32: lw $25, %got_disp(local_label)($gp) # encoding: [0x8f,0x99,A,A]
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# N32: # fixup A - offset: 0, value: %got_disp(local_label), kind: fixup_Mips_GOT_DISP
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# N32: # fixup A - offset: 0, value: %got_disp(local_label), kind: fixup_Mips_GOT_DISP
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# ELF-N32: 8f 99 00 00 lw $25, 0($gp)
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# ELF-N32-NEXT: R_MIPS_GOT_DISP/R_MIPS_NONE/R_MIPS_NONE local_label
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# N64: ld $25, %got_disp(local_label)($gp) # encoding: [0xdf,0x99,A,A]
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# N64: ld $25, %got_disp(local_label)($gp) # encoding: [0xdf,0x99,A,A]
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# N64: # fixup A - offset: 0, value: %got_disp(local_label), kind: fixup_Mips_GOT_DISP
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# N64: # fixup A - offset: 0, value: %got_disp(local_label), kind: fixup_Mips_GOT_DISP
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# ELF-N64: df 99 00 00 ld $25, 0($gp)
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# ELF-N64-NEXT: R_MIPS_GOT_DISP/R_MIPS_NONE/R_MIPS_NONE local_label
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# O32-MICROMIPS: lw $25, %got(local_label)($gp) # encoding: [0xff,0x3c,A,A]
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# O32-MICROMIPS: lw $25, %got(local_label)($gp) # encoding: [0xff,0x3c,A,A]
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# O32-MICROMIPS: # fixup A - offset: 0, value: %got(local_label), kind: fixup_MICROMIPS_GOT16
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# O32-MICROMIPS: # fixup A - offset: 0, value: %got(local_label), kind: fixup_MICROMIPS_GOT16
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# O32-MICROMIPS: addiu $25, $25, %lo(local_label) # encoding: [0x33,0x39,A,A]
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# O32-MICROMIPS: addiu $25, $25, %lo(local_label) # encoding: [0x33,0x39,A,A]
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@ -76,17 +78,28 @@ local_label:
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# MICROMIPS: jalr $ra, $25 # encoding: [0x03,0xf9,0x0f,0x3c]
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# MICROMIPS: jalr $ra, $25 # encoding: [0x03,0xf9,0x0f,0x3c]
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# ALL: nop # encoding: [0x00,0x00,0x00,0x00]
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# ALL: nop # encoding: [0x00,0x00,0x00,0x00]
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jal weak_label
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nop
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# Expanding "jal weak_label":
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# Expanding "jal weak_label":
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# O32: lw $25, %call16(weak_label)($gp) # encoding: [0x8f,0x99,A,A]
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# O32: lw $25, %call16(weak_label)($gp) # encoding: [0x8f,0x99,A,A]
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# O32: # fixup A - offset: 0, value: %call16(weak_label), kind: fixup_Mips_CALL16
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# O32: # fixup A - offset: 0, value: %call16(weak_label), kind: fixup_Mips_CALL16
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# ELF-O32: 8f 99 00 00 lw $25, 0($gp)
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# ELF-O32-NEXT: R_MIPS_CALL16 weak_label
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# N32: lw $25, %call16(weak_label)($gp) # encoding: [0x8f,0x99,A,A]
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# N32: lw $25, %call16(weak_label)($gp) # encoding: [0x8f,0x99,A,A]
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# N32: # fixup A - offset: 0, value: %call16(weak_label), kind: fixup_Mips_CALL16
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# N32: # fixup A - offset: 0, value: %call16(weak_label), kind: fixup_Mips_CALL16
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# ELF-N32: 8f 99 00 00 lw $25, 0($gp)
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# ELF-N32-NEXT: R_MIPS_CALL16/R_MIPS_NONE/R_MIPS_NONE weak_label
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# N64: ld $25, %call16(weak_label)($gp) # encoding: [0xdf,0x99,A,A]
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# N64: ld $25, %call16(weak_label)($gp) # encoding: [0xdf,0x99,A,A]
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# N64: # fixup A - offset: 0, value: %call16(weak_label), kind: fixup_Mips_CALL16
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# N64: # fixup A - offset: 0, value: %call16(weak_label), kind: fixup_Mips_CALL16
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# ELF-N64: df 99 00 00 ld $25, 0($gp)
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# ELF-N64-NEXT: R_MIPS_CALL16/R_MIPS_NONE/R_MIPS_NONE weak_label
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# O32-MICROMIPS: lw $25, %call16(weak_label)($gp) # encoding: [0xff,0x3c,A,A]
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# O32-MICROMIPS: lw $25, %call16(weak_label)($gp) # encoding: [0xff,0x3c,A,A]
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# O32-MICROMIPS: # fixup A - offset: 0, value: %call16(weak_label), kind: fixup_MICROMIPS_CALL16
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# O32-MICROMIPS: # fixup A - offset: 0, value: %call16(weak_label), kind: fixup_MICROMIPS_CALL16
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@ -100,17 +113,28 @@ local_label:
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# MICROMIPS: jalr $ra, $25 # encoding: [0x03,0xf9,0x0f,0x3c]
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# MICROMIPS: jalr $ra, $25 # encoding: [0x03,0xf9,0x0f,0x3c]
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# ALL: nop # encoding: [0x00,0x00,0x00,0x00]
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# ALL: nop # encoding: [0x00,0x00,0x00,0x00]
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jal global_label
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nop
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# Expanding "jal global_label":
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# Expanding "jal global_label":
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# O32: lw $25, %call16(global_label)($gp) # encoding: [0x8f,0x99,A,A]
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# O32: lw $25, %call16(global_label)($gp) # encoding: [0x8f,0x99,A,A]
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# O32: # fixup A - offset: 0, value: %call16(global_label), kind: fixup_Mips_CALL16
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# O32: # fixup A - offset: 0, value: %call16(global_label), kind: fixup_Mips_CALL16
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# ELF-O32: 8f 99 00 00 lw $25, 0($gp)
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# ELF-O32-NEXT: R_MIPS_CALL16 global_label
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# N32: lw $25, %call16(global_label)($gp) # encoding: [0x8f,0x99,A,A]
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# N32: lw $25, %call16(global_label)($gp) # encoding: [0x8f,0x99,A,A]
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# N32: # fixup A - offset: 0, value: %call16(global_label), kind: fixup_Mips_CALL16
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# N32: # fixup A - offset: 0, value: %call16(global_label), kind: fixup_Mips_CALL16
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# ELF-N32: 8f 99 00 00 lw $25, 0($gp)
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# ELF-N32-NEXT: R_MIPS_CALL16/R_MIPS_NONE/R_MIPS_NONE global_label
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# N64: ld $25, %call16(global_label)($gp) # encoding: [0xdf,0x99,A,A]
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# N64: ld $25, %call16(global_label)($gp) # encoding: [0xdf,0x99,A,A]
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# N64: # fixup A - offset: 0, value: %call16(global_label), kind: fixup_Mips_CALL16
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# N64: # fixup A - offset: 0, value: %call16(global_label), kind: fixup_Mips_CALL16
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# ELF-N64: df 99 00 00 ld $25, 0($gp)
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# ELF-N64-NEXT: R_MIPS_CALL16/R_MIPS_NONE/R_MIPS_NONE global_label
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# O32-MICROMIPS: lw $25, %call16(global_label)($gp) # encoding: [0xff,0x3c,A,A]
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# O32-MICROMIPS: lw $25, %call16(global_label)($gp) # encoding: [0xff,0x3c,A,A]
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# O32-MICROMIPS: # fixup A - offset: 0, value: %call16(global_label), kind: fixup_MICROMIPS_CALL16
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# O32-MICROMIPS: # fixup A - offset: 0, value: %call16(global_label), kind: fixup_MICROMIPS_CALL16
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@ -124,20 +148,29 @@ local_label:
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# MICROMIPS: jalr $ra, $25 # encoding: [0x03,0xf9,0x0f,0x3c]
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# MICROMIPS: jalr $ra, $25 # encoding: [0x03,0xf9,0x0f,0x3c]
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# ALL: nop # encoding: [0x00,0x00,0x00,0x00]
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# ALL: nop # encoding: [0x00,0x00,0x00,0x00]
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jal .text
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nop
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# FIXME: The .text section MCSymbol isn't created when printing assembly. However,
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# FIXME: The .text section MCSymbol isn't created when printing assembly. However,
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# it is created when generating an ELF object file.
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# it is created when generating an ELF object file.
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# Expanding "jal .text":
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# Expanding "jal .text":
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# O32-FIXME: lw $25, %got(.text)($gp) # encoding: [0x8f,0x99,A,A]
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# O32-FIXME: lw $25, %call16(.text)($gp) # encoding: [0x8f,0x99,A,A]
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# O32-FIXME: # fixup A - offset: 0, value: %got(.text), kind: fixup_Mips_GOT
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# O32-FIXME: # fixup A - offset: 0, value: %got(.text), kind: fixup_Mips_GOT_CALL
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# O32-FIXME: addiu $25, $25, %lo(.text) # encoding: [0x27,0x39,A,A]
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# O32-FIXME: # fixup A - offset: 0, value: %lo(.text), kind: fixup_Mips_LO16
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# N32-FIXME: lw $25, %got_disp(.text)($gp) # encoding: [0x8f,0x99,A,A]
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# ELF-O32: 8f 99 00 00 lw $25, 0($gp)
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# N32-FIXME: # fixup A - offset: 0, value: %got_disp(.text), kind: fixup_Mips_GOT_DISP
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# ELF-O32-NEXT: R_MIPS_CALL16 .text
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# N64-FIXME: ld $25, %got_disp(.text)($gp) # encoding: [0xdf,0x99,A,A]
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# N32-FIXME: lw $25, %call16(.text)($gp) # encoding: [0x8f,0x99,A,A]
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# N64-FIXME: # fixup A - offset: 0, value: %got_disp(.text), kind: fixup_Mips_GOT_DISP
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# N32-FIXME: # fixup A - offset: 0, value: %call16(.text), kind: fixup_Mips_GOT_DISP
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# ELF-N32: 8f 99 00 00 lw $25, 0($gp)
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# ELF-N32-NEXT: R_MIPS_CALL16/R_MIPS_NONE/R_MIPS_NONE .text
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# N64-FIXME: ld $25, %call16(.text)($gp) # encoding: [0xdf,0x99,A,A]
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# N64-FIXME: # fixup A - offset: 0, value: %call16(.text), kind: fixup_Mips_GOT_DISP
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# ELF-N64: df 99 00 00 ld $25, 0($gp)
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# ELF-N64-NEXT: R_MIPS_CALL16/R_MIPS_NONE/R_MIPS_NONE .text
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# O32-MICROMIPS-FIXME: lw $25, %got(.text)($gp) # encoding: [0xff,0x3c,A,A]
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# O32-MICROMIPS-FIXME: lw $25, %got(.text)($gp) # encoding: [0xff,0x3c,A,A]
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# O32-MICROMIPS-FIXME: # fixup A - offset: 0, value: %got(.text), kind: fixup_MICROMIPS_GOT16
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# O32-MICROMIPS-FIXME: # fixup A - offset: 0, value: %got(.text), kind: fixup_MICROMIPS_GOT16
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# MICROMIPS: jalr $ra, $25 # encoding: [0x03,0xf9,0x0f,0x3c]
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# MICROMIPS: jalr $ra, $25 # encoding: [0x03,0xf9,0x0f,0x3c]
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# ALL: nop # encoding: [0x00,0x00,0x00,0x00]
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# ALL: nop # encoding: [0x00,0x00,0x00,0x00]
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# local labels ($tmp symbols)
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jal 1f
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nop
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# Expanding "jal 1f":
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# Expanding "jal 1f":
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# O32: lw $25, %got($tmp0)($gp) # encoding: [0x8f,0x99,A,A]
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# O32: lw $25, %got($tmp0)($gp) # encoding: [0x8f,0x99,A,A]
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# O32: addiu $25, $25, %lo($tmp0) # encoding: [0x27,0x39,A,A]
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# O32: addiu $25, $25, %lo($tmp0) # encoding: [0x27,0x39,A,A]
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# O32: # fixup A - offset: 0, value: %lo($tmp0), kind: fixup_Mips_LO16
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# O32: # fixup A - offset: 0, value: %lo($tmp0), kind: fixup_Mips_LO16
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# ELF-O32: 8f 99 00 00 lw $25, 0($gp)
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# ELF-O32-NEXT: R_MIPS_GOT16 .text
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# ELF-O32-NEXT: 27 39 00 54 addiu $25, $25, 84
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# ELF-O32-NEXT: R_MIPS_LO16 .text
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# N32: lw $25, %got_disp($tmp0)($gp) # encoding: [0x8f,0x99,A,A]
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# N32: lw $25, %got_disp($tmp0)($gp) # encoding: [0x8f,0x99,A,A]
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# N32: # fixup A - offset: 0, value: %got_disp($tmp0), kind: fixup_Mips_GOT_DISP
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# N32: # fixup A - offset: 0, value: %got_disp($tmp0), kind: fixup_Mips_GOT_DISP
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# ELF-N32: 8f 99 00 00 lw $25, 0($gp)
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# ELF-N32-NEXT: R_MIPS_GOT_DISP/R_MIPS_NONE/R_MIPS_NONE .Ltmp0
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# N64: ld $25, %got_disp(.Ltmp0)($gp) # encoding: [0xdf,0x99,A,A]
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# N64: ld $25, %got_disp(.Ltmp0)($gp) # encoding: [0xdf,0x99,A,A]
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# N64: # fixup A - offset: 0, value: %got_disp(.Ltmp0), kind: fixup_Mips_GOT_DISP
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# N64: # fixup A - offset: 0, value: %got_disp(.Ltmp0), kind: fixup_Mips_GOT_DISP
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# ELF-N64: df 99 00 00 ld $25, 0($gp)
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# ELF-N64-NEXT: R_MIPS_GOT_DISP/R_MIPS_NONE/R_MIPS_NONE .Ltmp0
|
||||||
|
|
||||||
# O32-MICROMIPS: lw $25, %got($tmp0)($gp) # encoding: [0xff,0x3c,A,A]
|
# O32-MICROMIPS: lw $25, %got($tmp0)($gp) # encoding: [0xff,0x3c,A,A]
|
||||||
# O32-MICROMIPS: # fixup A - offset: 0, value: %got($tmp0), kind: fixup_MICROMIPS_GOT16
|
# O32-MICROMIPS: # fixup A - offset: 0, value: %got($tmp0), kind: fixup_MICROMIPS_GOT16
|
||||||
# O32-MICROMIPS: addiu $25, $25, %lo($tmp0) # encoding: [0x33,0x39,A,A]
|
# O32-MICROMIPS: addiu $25, $25, %lo($tmp0) # encoding: [0x33,0x39,A,A]
|
||||||
@ -181,3 +228,55 @@ local_label:
|
|||||||
# NORMAL: jalr $25 # encoding: [0x03,0x20,0xf8,0x09]
|
# NORMAL: jalr $25 # encoding: [0x03,0x20,0xf8,0x09]
|
||||||
# MICROMIPS: jalr $ra, $25 # encoding: [0x03,0xf9,0x0f,0x3c]
|
# MICROMIPS: jalr $ra, $25 # encoding: [0x03,0xf9,0x0f,0x3c]
|
||||||
# ALL: nop # encoding: [0x00,0x00,0x00,0x00]
|
# ALL: nop # encoding: [0x00,0x00,0x00,0x00]
|
||||||
|
|
||||||
|
.local forward_local
|
||||||
|
jal forward_local
|
||||||
|
nop
|
||||||
|
|
||||||
|
# Expanding "jal forward_local":
|
||||||
|
# O32-FIXME: lw $25, %got(forward_local)($gp) # encoding: [0x8f,0x99,A,A]
|
||||||
|
# O32-FIXME: # fixup A - offset: 0, value: %got(forward_local), kind: fixup_Mips_GOT
|
||||||
|
# O32-FIXME: addiu $25, $25, %lo(forward_local) # encoding: [0x27,0x39,A,A]
|
||||||
|
# O32-FIXME:: # fixup A - offset: 0, value: %lo(forward_local), kind: fixup_Mips_LO16
|
||||||
|
|
||||||
|
# ELF-O32: 8f 99 00 00 lw $25, 0($gp)
|
||||||
|
# ELF-O32-NEXT: R_MIPS_GOT16 .text
|
||||||
|
# ELF-O32-NEXT: 27 39 00 60 addiu $25, $25, 96
|
||||||
|
# ELF-O32-NEXT: R_MIPS_LO16 .text
|
||||||
|
|
||||||
|
# N32-FIXME: lw $25, %got_disp(forward_local)($gp) # encoding: [0x8f,0x99,A,A]
|
||||||
|
# N32-FIXME: # fixup A - offset: 0, value: %got_disp(forward_local), kind: fixup_Mips_GOT_DISP
|
||||||
|
|
||||||
|
# ELF-N32: 8f 99 00 00 lw $25, 0($gp)
|
||||||
|
# ELF-N32-NEXT: R_MIPS_GOT_DISP/R_MIPS_NONE/R_MIPS_NONE forward_local
|
||||||
|
|
||||||
|
# N64-FIXME: ld $25, %got_disp(forward_local)($gp) # encoding: [0xdf,0x99,A,A]
|
||||||
|
# N64-FIXME: # fixup A - offset: 0, value: %got_disp(forward_local), kind: fixup_Mips_GOT_DISP
|
||||||
|
|
||||||
|
# ELF-N64: df 99 00 00 ld $25, 0($gp)
|
||||||
|
# ELF-N64-NEXT: R_MIPS_GOT_DISP/R_MIPS_NONE/R_MIPS_NONE forward_local
|
||||||
|
|
||||||
|
# O32-MICROMIPS-FIXME: lw $25, %got(forward_local)($gp) # encoding: [0xff,0x3c,A,A]
|
||||||
|
# O32-MICROMIPS-FIXME: # fixup A - offset: 0, value: %got(forward_local), kind: fixup_MICROMIPS_GOT16
|
||||||
|
# O32-MICROMIPS-FIXME: addiu $25, $25, %lo(forward_local) # encoding: [0x33,0x39,A,A]
|
||||||
|
# O32-MICROMIPS-FIXME: # fixup A - offset: 0, value: %lo(forward_local), kind: fixup_MICROMIPS_LO16
|
||||||
|
|
||||||
|
# N32-MICROMIPS-FIXME: lw $25, %got_disp(forward_local)($gp) # encoding: [0xff,0x3c,A,A]
|
||||||
|
# N32-MICROMIPS-FIXME: # fixup A - offset: 0, value: %got_disp(forward_local), kind: fixup_MICROMIPS_GOT_DISP
|
||||||
|
|
||||||
|
# N64-MICROMIPS-FIXME: ld $25, %got_disp(forward_local)($gp) # encoding: [0xdf,0x99,A,A]
|
||||||
|
# N64-MICROMIPS-FIXME: # fixup A - offset: 0, value: %got_disp(forward_local), kind: fixup_MICROMIPS_GOT_DISP
|
||||||
|
|
||||||
|
# NORMAL: jalr $25 # encoding: [0x03,0x20,0xf8,0x09]
|
||||||
|
# MICROMIPS: jalr $ra, $25 # encoding: [0x03,0xf9,0x0f,0x3c]
|
||||||
|
# ALL: nop # encoding: [0x00,0x00,0x00,0x00]
|
||||||
|
|
||||||
|
|
||||||
|
.end local_label
|
||||||
|
|
||||||
|
1:
|
||||||
|
nop
|
||||||
|
add $8, $8, $8
|
||||||
|
nop
|
||||||
|
forward_local:
|
||||||
|
|
||||||
|
Loading…
Reference in New Issue
Block a user