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Use ULONG_MAX instead of __WORDSIZE to determine ELF class

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__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.

Bug: google-breakpad:631
Change-Id: If69caf578286d678585d1510c01562b969b5061f
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/2097352
Reviewed-by: Mike Frysinger <vapier@chromium.org>
This commit is contained in:
Michael Forney 2020-03-10 16:24:38 -07:00 committed by Mike Frysinger
parent a03ad96dbd
commit a0f647d7f3
1 changed files with 5 additions and 4 deletions
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9
src/common/linux/elf_core_dump.h
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@ -34,6 +34,7 @@
#define COMMON_LINUX_ELF_CORE_DUMP_H_
#include <elf.h>
#include <limits.h>
#include <link.h>
#include <stddef.h>
@ -45,18 +46,18 @@ namespace google_breakpad {
// provides methods for accessing program headers and the note section.
class ElfCoreDump {
public:
// ELF types based on the value of __WORDSIZE.
// ELF types based on the native word size.
typedef ElfW(Ehdr) Ehdr;
typedef ElfW(Nhdr) Nhdr;
typedef ElfW(Phdr) Phdr;
typedef ElfW(Word) Word;
typedef ElfW(Addr) Addr;
#if __WORDSIZE == 32
#if ULONG_MAX == 0xffffffff
static const int kClass = ELFCLASS32;
#elif __WORDSIZE == 64
#elif ULONG_MAX == 0xffffffffffffffff
static const int kClass = ELFCLASS64;
#else
#error "Unsupported __WORDSIZE for ElfCoreDump."
#error "Unsupported word size for ElfCoreDump."
#endif
// A class encapsulating the note content in a core dump, which provides