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llvm-project/lld/test/ELF/mips-n32-rels.s

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[ELF] Move `# REQUIRES:` line to the top llvm-svn: 335625
2018-06-27 00:58:19 +08:00
# REQUIRES: mips
[ELF][MIPS] N32 ABI support In short the patch introduces support for linking object file conform MIPS N32 ABI [1]. This ABI is similar to N64 ABI but uses 32-bit pointer size. The most non-trivial requirement of this ABI is one more relocation packing format. N64 ABI puts multiple relocation type into the single relocation record. The N32 ABI uses series of successive relocations with the same offset for this purpose. In this patch, new function `mergeMipsN32RelTypes` handle this case and "convert" N32 relocation to the N64 relocation so the rest of the code keep unchanged. For now, linker does not support series of relocations applied to sections without SHF_ALLOC bit. Probably later I will add the support or insert some sort of assert into the `relocateNonAlloc` routine to catch this case. [1] ftp://www.linux-mips.org/pub/linux/mips/doc/ABI/MIPS-N32-ABI-Handbook.pdf Differential revision: https://reviews.llvm.org/D26298 llvm-svn: 286052
2016-11-06 06:58:01 +08:00
# Check handling of N32 ABI relocation records.
[ELF][MIPS] Use llvm-mc to generate test case input file. NFC llvm-svn: 336201
2018-07-03 22:39:27 +08:00
# RUN: llvm-mc -filetype=obj -triple=mips64-unknown-linux \
# RUN: -target-abi n32 -o %t.o %s
# RUN: ld.lld %t.o -o %t.exe
[ELF][MIPS] N32 ABI support In short the patch introduces support for linking object file conform MIPS N32 ABI [1]. This ABI is similar to N64 ABI but uses 32-bit pointer size. The most non-trivial requirement of this ABI is one more relocation packing format. N64 ABI puts multiple relocation type into the single relocation record. The N32 ABI uses series of successive relocations with the same offset for this purpose. In this patch, new function `mergeMipsN32RelTypes` handle this case and "convert" N32 relocation to the N64 relocation so the rest of the code keep unchanged. For now, linker does not support series of relocations applied to sections without SHF_ALLOC bit. Probably later I will add the support or insert some sort of assert into the `relocateNonAlloc` routine to catch this case. [1] ftp://www.linux-mips.org/pub/linux/mips/doc/ABI/MIPS-N32-ABI-Handbook.pdf Differential revision: https://reviews.llvm.org/D26298 llvm-svn: 286052
2016-11-06 06:58:01 +08:00
# RUN: llvm-objdump -t -d -s %t.exe | FileCheck %s
# RUN: llvm-readobj -h %t.exe | FileCheck -check-prefix=ELF %s
[ELF][MIPS] Use llvm-mc to generate test case input file. NFC llvm-svn: 336201
2018-07-03 22:39:27 +08:00
.option pic2
.text
.type __start, @function
.global __start
__start:
lui $gp,%hi(%neg(%gp_rel(__start))) # R_MIPS_GPREL16
# R_MIPS_SUB
# R_MIPS_HI16
loc:
daddiu $gp,$gp,%lo(%neg(%gp_rel(__start))) # R_MIPS_GPREL16
# R_MIPS_SUB
# R_MIPS_LO16
.section .rodata,"a",@progbits
.gpword(loc) # R_MIPS_GPREL32
[ELF][MIPS] N32 ABI support In short the patch introduces support for linking object file conform MIPS N32 ABI [1]. This ABI is similar to N64 ABI but uses 32-bit pointer size. The most non-trivial requirement of this ABI is one more relocation packing format. N64 ABI puts multiple relocation type into the single relocation record. The N32 ABI uses series of successive relocations with the same offset for this purpose. In this patch, new function `mergeMipsN32RelTypes` handle this case and "convert" N32 relocation to the N64 relocation so the rest of the code keep unchanged. For now, linker does not support series of relocations applied to sections without SHF_ALLOC bit. Probably later I will add the support or insert some sort of assert into the `relocateNonAlloc` routine to catch this case. [1] ftp://www.linux-mips.org/pub/linux/mips/doc/ABI/MIPS-N32-ABI-Handbook.pdf Differential revision: https://reviews.llvm.org/D26298 llvm-svn: 286052
2016-11-06 06:58:01 +08:00
# CHECK: Disassembly of section .text:
# CHECK-NEXT: __start:
# CHECK-NEXT: 20000: 3c 1c 00 01 lui $gp, 1
# ^-- 0x20000 - 0x37ff0
# ^-- 0 - 0xfffe8010
# ^-- %hi(0x17ff0)
# CHECK: loc:
# CHECK-NEXT: 20004: 67 9c 7f f0 daddiu $gp, $gp, 32752
# ^-- 0x20000 - 0x37ff0
# ^-- 0 - 0xfffe8010
# ^-- %lo(0x17ff0)
# CHECK: Contents of section .rodata:
[ELF][MIPS] Use llvm-mc to generate test case input file. NFC llvm-svn: 336201
2018-07-03 22:39:27 +08:00
# CHECK-NEXT: {{[0-9a-f]+}} fffe8014
# ^-- loc - _gp
[ELF][MIPS] N32 ABI support In short the patch introduces support for linking object file conform MIPS N32 ABI [1]. This ABI is similar to N64 ABI but uses 32-bit pointer size. The most non-trivial requirement of this ABI is one more relocation packing format. N64 ABI puts multiple relocation type into the single relocation record. The N32 ABI uses series of successive relocations with the same offset for this purpose. In this patch, new function `mergeMipsN32RelTypes` handle this case and "convert" N32 relocation to the N64 relocation so the rest of the code keep unchanged. For now, linker does not support series of relocations applied to sections without SHF_ALLOC bit. Probably later I will add the support or insert some sort of assert into the `relocateNonAlloc` routine to catch this case. [1] ftp://www.linux-mips.org/pub/linux/mips/doc/ABI/MIPS-N32-ABI-Handbook.pdf Differential revision: https://reviews.llvm.org/D26298 llvm-svn: 286052
2016-11-06 06:58:01 +08:00
# CHECK: 00020004 .text 00000000 loc
Don't make _gp absolute. _gp points to a position in the file, so it is not really absolute. It is also simpler to not force it to be absolute, so if there is no strong ABI requirement we should not do it. llvm-svn: 313333
2017-09-15 09:49:01 +08:00
# CHECK: 00037ff0 .got 00000000 .hidden _gp
[ELF][MIPS] N32 ABI support In short the patch introduces support for linking object file conform MIPS N32 ABI [1]. This ABI is similar to N64 ABI but uses 32-bit pointer size. The most non-trivial requirement of this ABI is one more relocation packing format. N64 ABI puts multiple relocation type into the single relocation record. The N32 ABI uses series of successive relocations with the same offset for this purpose. In this patch, new function `mergeMipsN32RelTypes` handle this case and "convert" N32 relocation to the N64 relocation so the rest of the code keep unchanged. For now, linker does not support series of relocations applied to sections without SHF_ALLOC bit. Probably later I will add the support or insert some sort of assert into the `relocateNonAlloc` routine to catch this case. [1] ftp://www.linux-mips.org/pub/linux/mips/doc/ABI/MIPS-N32-ABI-Handbook.pdf Differential revision: https://reviews.llvm.org/D26298 llvm-svn: 286052
2016-11-06 06:58:01 +08:00
# CHECK: 00020000 g F .text 00000000 __start
# ELF: Format: ELF32-mips
# ELF-NEXT: Arch: mips
# ELF-NEXT: AddressSize: 32bit
# ELF-NEXT: LoadName:
# ELF-NEXT: ElfHeader {
# ELF-NEXT: Ident {
# ELF-NEXT: Magic: (7F 45 4C 46)
# ELF-NEXT: Class: 32-bit (0x1)
# ELF-NEXT: DataEncoding: BigEndian (0x2)
# ELF-NEXT: FileVersion: 1
# ELF-NEXT: OS/ABI: SystemV (0x0)
# ELF-NEXT: ABIVersion: 0
# ELF-NEXT: Unused: (00 00 00 00 00 00 00)
# ELF-NEXT: }
# ELF-NEXT: Type: Executable (0x2)
# ELF-NEXT: Machine: EM_MIPS (0x8)
# ELF-NEXT: Version: 1
# ELF-NEXT: Entry: 0x20000
# ELF-NEXT: ProgramHeaderOffset:
# ELF-NEXT: SectionHeaderOffset:
# ELF-NEXT: Flags [
# ELF-NEXT: EF_MIPS_ABI2
[ELF][MIPS] Use llvm-mc to generate test case input file. NFC llvm-svn: 336201
2018-07-03 22:39:27 +08:00
# ELF-NEXT: EF_MIPS_ARCH_64
# ELF-NEXT: EF_MIPS_CPIC
# ELF-NEXT: EF_MIPS_PIC
[ELF][MIPS] N32 ABI support In short the patch introduces support for linking object file conform MIPS N32 ABI [1]. This ABI is similar to N64 ABI but uses 32-bit pointer size. The most non-trivial requirement of this ABI is one more relocation packing format. N64 ABI puts multiple relocation type into the single relocation record. The N32 ABI uses series of successive relocations with the same offset for this purpose. In this patch, new function `mergeMipsN32RelTypes` handle this case and "convert" N32 relocation to the N64 relocation so the rest of the code keep unchanged. For now, linker does not support series of relocations applied to sections without SHF_ALLOC bit. Probably later I will add the support or insert some sort of assert into the `relocateNonAlloc` routine to catch this case. [1] ftp://www.linux-mips.org/pub/linux/mips/doc/ABI/MIPS-N32-ABI-Handbook.pdf Differential revision: https://reviews.llvm.org/D26298 llvm-svn: 286052
2016-11-06 06:58:01 +08:00
# ELF-NEXT: ]