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| author | Arnd Bergmann <arnd@arndb.de> | 2017-11-23 13:46:33 +0100 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2019-11-15 14:38:29 +0100 |
| commit | e2bb80d55d75ce7fd300fcd8d47a97413c3cd322 (patch) | |
| tree | 05f05ef0e3b8b8125ed1834c05f0c2f465860257 /fs/compat_binfmt_elf.c | |
| parent | 693737b6cc2edc258040b28462a90b63503394d9 (diff) | |
| download | lwn-e2bb80d55d75ce7fd300fcd8d47a97413c3cd322.tar.gz lwn-e2bb80d55d75ce7fd300fcd8d47a97413c3cd322.zip | |
y2038: elfcore: Use __kernel_old_timeval for process times
We store elapsed time for a crashed process in struct elf_prstatus using
'timeval' structures. Once glibc starts using 64-bit time_t, this becomes
incompatible with the kernel's idea of timeval since the structure layout
no longer matches on 32-bit architectures.
This changes the definition of the elf_prstatus structure to use
__kernel_old_timeval instead, which is hardcoded to the currently used
binary layout. There is no risk of overflow in y2038 though, because
the time values are all relative times, and can store up to 68 years
of process elapsed time.
There is a risk of applications breaking at build time when they
use the new kernel headers and expect the type to be exactly 'timeval'
rather than a structure that has the same fields as before. Those
applications have to be modified to deal with 64-bit time_t anyway.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'fs/compat_binfmt_elf.c')
| -rw-r--r-- | fs/compat_binfmt_elf.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/compat_binfmt_elf.c b/fs/compat_binfmt_elf.c index b7f9ffa1d5f1..aaad4ca1217e 100644 --- a/fs/compat_binfmt_elf.c +++ b/fs/compat_binfmt_elf.c @@ -48,8 +48,8 @@ #define elf_prstatus compat_elf_prstatus #define elf_prpsinfo compat_elf_prpsinfo -#undef ns_to_timeval -#define ns_to_timeval ns_to_old_timeval32 +#undef ns_to_kernel_old_timeval +#define ns_to_kernel_old_timeval ns_to_old_timeval32 /* * To use this file, asm/elf.h must define compat_elf_check_arch. |