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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
57 lines
1.3 KiB
C++
57 lines
1.3 KiB
C++
//===- ScriptLexer.h --------------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLD_ELF_SCRIPT_LEXER_H
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#define LLD_ELF_SCRIPT_LEXER_H
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#include "lld/Common/LLVM.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include <utility>
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#include <vector>
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namespace lld {
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namespace elf {
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class ScriptLexer {
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public:
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explicit ScriptLexer(MemoryBufferRef mb);
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void setError(const Twine &msg);
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void tokenize(MemoryBufferRef mb);
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static StringRef skipSpace(StringRef s);
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bool atEOF();
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StringRef next();
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StringRef peek();
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StringRef peek2();
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void skip();
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bool consume(StringRef tok);
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void expect(StringRef expect);
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bool consumeLabel(StringRef tok);
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std::string getCurrentLocation();
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std::vector<MemoryBufferRef> mbs;
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std::vector<StringRef> tokens;
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bool inExpr = false;
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size_t pos = 0;
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protected:
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MemoryBufferRef getCurrentMB();
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private:
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void maybeSplitExpr();
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StringRef getLine();
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size_t getLineNumber();
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size_t getColumnNumber();
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};
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} // namespace elf
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} // namespace lld
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#endif
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