diff options
| author | Michael Neuling <mikey@neuling.org> | 2008-06-25 14:07:17 +1000 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2008-07-01 11:28:42 +1000 |
| commit | 9e7511861c4f8d35852a3721c5bcd92661cb4c9f (patch) | |
| tree | 4d4a72ad915fc04e9750af0ca3ae91062644f1c9 | |
| parent | 9b09c6d909dfd8de96b99b9b9c808b94b0a71614 (diff) | |
powerpc: Fix MSR setting in 32 bit signal code
If we set the SPE MSR bit in save_user_regs we can blow away the VEC
bit. This doesn't matter in reality as they are in fact the same bit
but looks bad.
Also, when we add VSX in a later patch, we need to be able to set two
separate MSR bits here.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
| -rw-r--r-- | arch/powerpc/kernel/signal_32.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/arch/powerpc/kernel/signal_32.c b/arch/powerpc/kernel/signal_32.c index 4ae16d179803..b057e6852a7d 100644 --- a/arch/powerpc/kernel/signal_32.c +++ b/arch/powerpc/kernel/signal_32.c @@ -336,6 +336,8 @@ struct rt_sigframe { static int save_user_regs(struct pt_regs *regs, struct mcontext __user *frame, int sigret) { + unsigned long msr = regs->msr; + /* Make sure floating point registers are stored in regs */ flush_fp_to_thread(current); @@ -354,8 +356,7 @@ static int save_user_regs(struct pt_regs *regs, struct mcontext __user *frame, return 1; /* set MSR_VEC in the saved MSR value to indicate that frame->mc_vregs contains valid data */ - if (__put_user(regs->msr | MSR_VEC, &frame->mc_gregs[PT_MSR])) - return 1; + msr |= MSR_VEC; } /* else assert((regs->msr & MSR_VEC) == 0) */ @@ -377,8 +378,7 @@ static int save_user_regs(struct pt_regs *regs, struct mcontext __user *frame, return 1; /* set MSR_SPE in the saved MSR value to indicate that frame->mc_vregs contains valid data */ - if (__put_user(regs->msr | MSR_SPE, &frame->mc_gregs[PT_MSR])) - return 1; + msr |= MSR_SPE; } /* else assert((regs->msr & MSR_SPE) == 0) */ @@ -387,6 +387,8 @@ static int save_user_regs(struct pt_regs *regs, struct mcontext __user *frame, return 1; #endif /* CONFIG_SPE */ + if (__put_user(msr, &frame->mc_gregs[PT_MSR])) + return 1; if (sigret) { /* Set up the sigreturn trampoline: li r0,sigret; sc */ if (__put_user(0x38000000UL + sigret, &frame->tramp[0]) |