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| author | Michael Forney <mforney@mforney.org> | 2020-03-16 23:08:02 -0700 |
|---|---|---|
| committer | Mike Frysinger <vapier@chromium.org> | 2020-03-17 06:30:52 +0000 |
| commit | 23e6fbf571a6638ce9642fc1f50baf1af0f54268 (patch) | |
| tree | c3ec1270f8769b6baf2eacbc029de6adbd9b6603 /src/common/dwarf | |
| parent | Roll src/src/third_party/lss/ f70e2f164..fd00dbbd0 (2 commits) (diff) | |
| download | breakpad-23e6fbf571a6638ce9642fc1f50baf1af0f54268.tar.xz | |
Use ULONG_MAX instead of __WORDSIZE to determine native ELF architecture
__WORDSIZE is an internal libc definition. Instead, we can use
ULONG_MAX from limits.h, whose value corresponds to the machine's
native word size.
This allows us to remove the fallback definition of __WORDSIZE in
the Android compatibility headers.
Bug: google-breakpad:631
Change-Id: I7b9e6f3b2121f78ccad9e32bf26acac518aefd8f
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/2107100
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Diffstat (limited to 'src/common/dwarf')
| -rw-r--r-- | src/common/dwarf/elf_reader.cc | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/src/common/dwarf/elf_reader.cc b/src/common/dwarf/elf_reader.cc index 4135a51a..7dc46fd2 100644 --- a/src/common/dwarf/elf_reader.cc +++ b/src/common/dwarf/elf_reader.cc @@ -20,8 +20,8 @@ // Although most of this code can deal with arbitrary ELF files of // either word size, the public ElfReader interface only examines // files loaded into the current address space, which must all match -// __WORDSIZE. This code cannot handle ELF files with a non-native -// byte ordering. +// the machine's native word size. This code cannot handle ELF files +// with a non-native byte ordering. // // TODO(chatham): It would be nice if we could accomplish this task // without using malloc(), so we could use it as the process is dying. @@ -30,12 +30,13 @@ #define _GNU_SOURCE // needed for pread() #endif -#include <sys/types.h> -#include <sys/stat.h> -#include <sys/mman.h> -#include <unistd.h> #include <fcntl.h> +#include <limits.h> #include <string.h> +#include <sys/mman.h> +#include <sys/stat.h> +#include <sys/types.h> +#include <unistd.h> #include <algorithm> #include <map> @@ -1053,9 +1054,9 @@ ElfReader::~ElfReader() { // The only word-size specific part of this file is IsNativeElfFile(). -#if __WORDSIZE == 32 +#if ULONG_MAX == 0xffffffff #define NATIVE_ELF_ARCH Elf32 -#elif __WORDSIZE == 64 +#elif ULONG_MAX == 0xffffffffffffffff #define NATIVE_ELF_ARCH Elf64 #else #error "Invalid word size" |