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| author | H.J. Lu <hjl.tools@gmail.com> | 2012-05-22 12:01:39 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2012-05-22 12:01:39 -0700 |
| commit | dc7322443eb8806290a6f4b4f5a9dfc3388b9318 (patch) | |
| tree | 8dedcdf24bcb3a1e7e82e2f50e6d0b3e61e713bd /sysdeps | |
| parent | d9990eacdf5ab4dbb54fef1ba1e3b67c6112ccc7 (diff) | |
| download | glibc-dc7322443eb8806290a6f4b4f5a9dfc3388b9318.tar.gz | |
Update x32 arch_prctl.c
Diffstat (limited to 'sysdeps')
| -rw-r--r-- | sysdeps/unix/sysv/linux/x86_64/x32/arch_prctl.c | 18 |
1 files changed, 8 insertions, 10 deletions
diff --git a/sysdeps/unix/sysv/linux/x86_64/x32/arch_prctl.c b/sysdeps/unix/sysv/linux/x86_64/x32/arch_prctl.c index 44c100b9a4..6933306de9 100644 --- a/sysdeps/unix/sysv/linux/x86_64/x32/arch_prctl.c +++ b/sysdeps/unix/sysv/linux/x86_64/x32/arch_prctl.c @@ -21,28 +21,27 @@ #include <sys/syscall.h> #include <sysdep.h> -/* Since x32 arch_prctl stores 32-bit base address of segment register %fs - and %gs as unsigned 64-bit value via ARCH_GET_FS and ARCH_GET_GS, we - use a local unsigned 64-bit variable to hold the base address and copy - it to ADDR after arch_prctl return. */ +/* Since x32 arch_prctl stores 32-bit base address of segment registers + %fs and %gs as unsigned 64-bit value via ARCH_GET_FS and ARCH_GET_GS, + we use an unsigned 64-bit variable to hold the base address and copy + it to ADDR after the system call returns. */ int __arch_prctl (int code, uintptr_t *addr) { int res; uint64_t addr64; - uintptr_t *addr_saved; + void *prctl_arg = addr; switch (code) { case ARCH_GET_FS: case ARCH_GET_GS: - addr_saved = addr; - addr = (uintptr_t *) &addr64; + prctl_arg = &addr64; break; } - res = INLINE_SYSCALL (arch_prctl, 2, code, addr); + res = INLINE_SYSCALL (arch_prctl, 2, code, prctl_arg); if (res == 0) switch (code) { @@ -54,11 +53,10 @@ __arch_prctl (int code, uintptr_t *addr) __set_errno (EOVERFLOW); return -1; } - *addr_saved = (uintptr_t) addr64; + *addr = (uintptr_t) addr64; break; } return res; } - weak_alias (__arch_prctl, arch_prctl) |