c384ca3c6a
For a relative path in INPUT() or GROUP(), this patch changes the search order by adding the directory of the current linker script. The new search order (consistent with GNU ld >= 2.35 regarding the new test `test/ELF/input-relative.s`): 1. the directory of the current linker script (GNU ld from Binutils 2.35 onwards; https://sourceware.org/bugzilla/show_bug.cgi?id=25806) 2. the current working directory 3. library paths (-L) This behavior makes it convenient to replace a .so or .a with a linker script with additional input. For example, glibc ``` % cat /usr/lib/x86_64-linux-gnu/libm.a /* GNU ld script */ OUTPUT_FORMAT(elf64-x86-64) GROUP ( /usr/lib/x86_64-linux-gnu/libm-2.29.a /usr/lib/x86_64-linux-gnu/libmvec.a ) ``` could be simplified as `GROUP(libm-2.29.a libmvec.a)`. Another example is to make libc++.a a linker script: ``` INPUT(libc++.a.1 libc++abi.a) ``` Note, -l is not affected. Reviewed By: psmith Differential Revision: https://reviews.llvm.org/D77779
45 lines
1.7 KiB
ArmAsm
45 lines
1.7 KiB
ArmAsm
# REQUIRES: x86
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## For a relative pathname in INPUT() or GROUP(), the parent directory of
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## the current linker script has priority over current working directory and -L.
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# RUN: rm -rf %t.dir && mkdir %t.dir && cd %t.dir
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# RUN: mkdir dir
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# RUN: llvm-mc -filetype=obj -triple=x86_64 %s -o a.o
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# RUN: echo '.globl b, cwd; b: cwd:' | llvm-mc -filetype=obj -triple=x86_64 - -o b.o
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# RUN: echo '.globl b, dir; b: dir:' | llvm-mc -filetype=obj -triple=x86_64 - -o dir/b.o
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# RUN: llvm-ar rc libb.a b.o
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# RUN: llvm-ar rc dir/libb.a dir/b.o
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## A relative pathname is relative to the parent directory of the current linker script.
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## The directory has priority over current working directory and -L.
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# RUN: echo 'INPUT(libb.a)' > dir/relative.lds
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# RUN: ld.lld -L. a.o dir/relative.lds -o - | llvm-nm - | FileCheck --check-prefix=DIR %s
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## GROUP() uses the same search order.
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# RUN: echo 'GROUP(libb.a)' > dir/relative1.lds
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# RUN: ld.lld -L. a.o dir/relative1.lds -o - | llvm-nm - | FileCheck --check-prefix=DIR %s
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# DIR: T dir
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## -l does not use the special rule.
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# RUN: echo 'INPUT(-lb)' > dir/cwd.lds
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# RUN: ld.lld -L. a.o dir/cwd.lds -o - | llvm-nm - | FileCheck --check-prefix=CWD %s
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# RUN: echo 'GROUP(-lb)' > dir/cwd1.lds
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# RUN: ld.lld -L. a.o dir/cwd1.lds -o - | llvm-nm - | FileCheck --check-prefix=CWD %s
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# CWD: T cwd
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## The rules does not apply to an absolute path.
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# RUN: echo 'INPUT(/libb.a)' > dir/absolute.lds
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# RUN: not ld.lld a.o dir/absolute.lds -o /dev/null
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## If the parent directory of the current linker script does not contain the file,
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## fall back to the current working directory.
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# RUN: cp libb.a libc.a
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# RUN: echo 'INPUT(libc.a)' > dir/fallback.lds
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# RUN: ld.lld a.o dir/fallback.lds -o /dev/null
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.globl _start
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_start:
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call b
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