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llvm-project/lld/test/MachO/load-command-sequence.s

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[lld-macho] Fix alignment & layout to match ld64 and satisfy kernel & codesign The Mach kernel & codesign on arm64 macOS has strict requirements for alignment and sequence of segments and sections. Dyld probably is just as picky, though kernel & codesign reject malformed Mach-O files before dyld ever has a chance. I developed this diff by incrementally changing alignments & sequences to match the output of ld64. I stopped when my hello-world test program started working: `codesign --verify` succeded, and `execve(2)` didn't immediately fail with `errno == EBADMACHO` = `"Malformed Mach-O file"`. Differential Revision: https://reviews.llvm.org/D94935
2021-01-03 02:31:55 +08:00
# REQUIRES: x86
# RUN: rm -rf %t && mkdir -p %t
# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-darwin %s -o %t/test.o
# RUN: %lld -execute -o %t/exec %t/test.o -lSystem
# RUN: %lld -dylib -o %t/dylib %t/test.o -lSystem
# RUN: %lld -bundle -o %t/bundle %t/test.o -lSystem
# RUN: llvm-objdump --macho --all-headers %t/exec | \
# RUN: FileCheck %s --check-prefixes=EXEC,COMMON
# RUN: llvm-objdump --macho --all-headers %t/dylib | \
# RUN: FileCheck %s --check-prefixes=DYLIB,COMMON
# RUN: llvm-objdump --macho --all-headers %t/bundle | \
[test] Fix unused check prefixes
2021-02-09 05:44:29 +08:00
# RUN: FileCheck %s --check-prefix=COMMON
[lld-macho] Fix alignment & layout to match ld64 and satisfy kernel & codesign The Mach kernel & codesign on arm64 macOS has strict requirements for alignment and sequence of segments and sections. Dyld probably is just as picky, though kernel & codesign reject malformed Mach-O files before dyld ever has a chance. I developed this diff by incrementally changing alignments & sequences to match the output of ld64. I stopped when my hello-world test program started working: `codesign --verify` succeded, and `execve(2)` didn't immediately fail with `errno == EBADMACHO` = `"Malformed Mach-O file"`. Differential Revision: https://reviews.llvm.org/D94935
2021-01-03 02:31:55 +08:00
## Check that load commands and sections within segments occur in the proper
## sequence. On ARM64 kernel is especially picky about layout, and will
## barf with errno=EBADMACHO when the sequence is wrong.
# EXEC: cmd LC_SEGMENT_64
# EXEC: segname __PAGEZERO
# COMMON: cmd LC_SEGMENT_64
# COMMON: segname __TEXT
# COMMON: sectname __text
# COMMON: segname __TEXT
# COMMON: sectname __cstring
# COMMON: segname __TEXT
# COMMON: cmd LC_SEGMENT_64
# COMMON: segname __DATA_CONST
# COMMON: sectname __got
# COMMON: segname __DATA_CONST
# COMMON: cmd LC_SEGMENT_64
# COMMON: segname __DATA
# COMMON: sectname __data
# COMMON: segname __DATA
# COMMON: sectname __const
# COMMON: segname __DATA
# COMMON: cmd LC_SEGMENT_64
# COMMON: segname __LINKEDIT
# COMMON: cmd LC_DYLD_INFO_ONLY
# COMMON: cmd LC_SYMTAB
# COMMON: cmd LC_DYSYMTAB
# EXEC: cmd LC_LOAD_DYLINKER
# EXEC: cmd LC_MAIN
# DYLIB: cmd LC_ID_DYLIB
# COMMON: cmd LC_UUID
# COMMON: cmd LC_BUILD_VERSION
# COMMON: cmd LC_LOAD_DYLIB
.section __TEXT,__cstring
_str:
.asciz "Help me! I'm trapped in a test!\n"
.globl _mutable
.section __DATA,__data
mutable:
.long 0x1234
.globl _constant
.section __DATA,__const
constant:
.long 0x4567
.text
.global _main
_main:
mov ___nan@GOTPCREL(%rip), %rax
ret