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| author | David S. Miller <davem@davemloft.net> | 2018-10-17 21:28:01 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-10-17 21:29:23 -0700 |
| commit | 776ca1543b5fe673aaf1beb244fcc2429d378083 (patch) | |
| tree | c40d5e40a9a3746b21520c2d57a45d0de01ed6fe /arch | |
| parent | c343db455eb3105f11bb5ac290d77ab2006b0209 (diff) | |
| download | linux-0-day-776ca1543b5fe673aaf1beb244fcc2429d378083.tar.gz linux-0-day-776ca1543b5fe673aaf1beb244fcc2429d378083.tar.xz | |
sparc: Fix syscall fallback bugs in VDSO.
First, the trap number for 32-bit syscalls is 0x10.
Also, only negate the return value when syscall error is indicated by
the carry bit being set.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/sparc/vdso/vclock_gettime.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/arch/sparc/vdso/vclock_gettime.c b/arch/sparc/vdso/vclock_gettime.c index 3feb3d960ca50..75dca9aab737c 100644 --- a/arch/sparc/vdso/vclock_gettime.c +++ b/arch/sparc/vdso/vclock_gettime.c @@ -33,9 +33,19 @@ #define TICK_PRIV_BIT (1ULL << 63) #endif +#ifdef CONFIG_SPARC64 #define SYSCALL_STRING \ "ta 0x6d;" \ - "sub %%g0, %%o0, %%o0;" \ + "bcs,a 1f;" \ + " sub %%g0, %%o0, %%o0;" \ + "1:" +#else +#define SYSCALL_STRING \ + "ta 0x10;" \ + "bcs,a 1f;" \ + " sub %%g0, %%o0, %%o0;" \ + "1:" +#endif #define SYSCALL_CLOBBERS \ "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \ |