lib/glibc
1
0
Fork 0
mirror of https://sourceware.org/git/glibc.git synced 2025-07-29 11:41:21 +03:00
Code Activity

PowerPC: Add time vDSO support

Browse Source 
PowerPC kernel now provides a vDSO implementation for time syscall
(commit fcb41a2030abe0eb716ef0798035ef9562097f42). This patch changes
time syscall wrapper to use the vDSO when available. It also changes
the default non vDSO time on PowerPC to use sysdeps/posix/time.c
(since gettimeofday is a vDSO call).
This commit is contained in:
Adhemerval Zanella
2013-05-03 15:00:31 -05:00
parent c31a5b1e8f
commit 83e7640f6b
5 changed files with 81 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
sysdeps/unix/sysv/linux/powerpc/bits/libc-vdso.h
View File

@ -32,14 +32,16 @@ extern void *__vdso_get_tbfreq;
extern void *__vdso_getcpu;
extern void *__vdso_time;
/* This macro is needed for PPC64 to return a skeleton OPD entry of a vDSO
symbol. This works because _dl_vdso_vsym always return the function
address, and no vDSO symbols use the TOC or chain pointers from the OPD
so we can allow them to be garbage. */
#if defined(__PPC64__) || defined(__powerpc64__)
#define VDSO_IFUNC_RET(value) &value
#define VDSO_IFUNC_RET(value) ((void *) &(value))
#else
#define VDSO_IFUNC_RET(value) value
#define VDSO_IFUNC_RET(value) ((void *) (value))
#endif
#endif