415c0cd698
The new Darwin backend for LLD is now able to link reasonably large real-world programs on x86_64. For instance, we have achieved self-hosting for the X86_64 target, where all LLD tests pass when building lld with itself on macOS. As such, we would like to make it the default back-end. The new port is now named `ld64.lld`, and the old port remains accessible as `ld64.lld.darwinold` This [annoucement email][1] has some context. (But note that, unlike what the email says, we are no longer doing this as part of the LLVM 12 branch cut -- instead we will go into LLVM 13.) Numerous mechanical test changes were required to make this change; in the interest of creating something that's reviewable on Phabricator, I've split out the boring changes into a separate diff (D95905). I plan to merge its contents with those in this diff before landing. (@gkm made the original draft of this diff, and he has agreed to let me take over.) [1]: https://lists.llvm.org/pipermail/llvm-dev/2021-January/147665.html Reviewed By: #lld-macho, thakis Differential Revision: https://reviews.llvm.org/D95204
67 lines
2.1 KiB
YAML
67 lines
2.1 KiB
YAML
# RUN: ld64.lld.darwinold -arch i386 %s %p/Inputs/hello-world-x86.yaml -o %t
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# RUN: obj2yaml %t | FileCheck %s
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#
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# Test that the string table contains a ' ' as its first symbol
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#
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--- !mach-o
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arch: x86
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file-type: MH_OBJECT
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flags: [ MH_SUBSECTIONS_VIA_SYMBOLS ]
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sections:
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- segment: __TEXT
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section: __text
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type: S_REGULAR
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attributes: [ S_ATTR_PURE_INSTRUCTIONS, S_ATTR_SOME_INSTRUCTIONS ]
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address: 0x0000000000000000
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content: [ 0x55, 0x89, 0xE5, 0x83, 0xEC, 0x08, 0xE8, 0x00,
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0x00, 0x00, 0x00, 0x58, 0x8D, 0x80, 0x16, 0x00,
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0x00, 0x00, 0x89, 0x04, 0x24, 0xE8, 0xE6, 0xFF,
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0xFF, 0xFF, 0x31, 0xC0, 0x83, 0xC4, 0x08, 0x5D,
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0xC3 ]
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relocations:
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- offset: 0x00000016
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type: GENERIC_RELOC_VANILLA
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length: 2
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pc-rel: true
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extern: true
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symbol: 1
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- offset: 0x0000000E
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scattered: true
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type: GENERIC_RELOC_LOCAL_SECTDIFF
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length: 2
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pc-rel: false
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value: 0x00000021
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- offset: 0x00000000
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scattered: true
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type: GENERIC_RELOC_PAIR
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length: 2
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pc-rel: false
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value: 0x0000000B
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- segment: __TEXT
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section: __cstring
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type: S_CSTRING_LITERALS
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attributes: [ ]
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address: 0x0000000000000021
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content: [ 0x68, 0x65, 0x6C, 0x6C, 0x6F, 0x0A, 0x00 ]
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global-symbols:
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- name: _main
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type: N_SECT
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scope: [ N_EXT ]
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sect: 1
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value: 0x0000000000000000
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undefined-symbols:
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- name: _printf
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type: N_UNDF
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scope: [ N_EXT ]
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value: 0x0000000000000000
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...
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# CHECK: StringTable:
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# CHECK-NEXT: - ' '
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# CHECK-NEXT: - __mh_execute_header
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# CHECK-NEXT: - _main
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# CHECK-NEXT: - _printf
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# CHECK-NEXT: - dyld_stub_binder
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# CHECK-NEXT: - ''
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