diff options
| author | Anton Blanchard <anton@samba.org> | 2013-09-23 02:04:38 (GMT) |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-10-11 05:48:27 (GMT) |
| commit | 87fec0514f613f8ac43c01b0bc0bc7072c5d10ae (patch) | |
| tree | 9da3fd6e0c527501160535e9095c4596fb4eb056 /arch/powerpc/kernel/ptrace.c | |
| parent | e156bd8ad76939a9bcd66d85cf06f8cde1fb8030 (diff) | |
| download | linux-87fec0514f613f8ac43c01b0bc0bc7072c5d10ae.tar.xz | |
powerpc: PTRACE_PEEKUSR/PTRACE_POKEUSER of FPR registers in little endian builds
FPRs overlap the high 64bits of the first 32 VSX registers. The
ptrace FP read/write code assumes big endian ordering and grabs
the lowest 64 bits.
Fix this by using the TS_FPR macro which does the right thing.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/kernel/ptrace.c')
| -rw-r--r-- | arch/powerpc/kernel/ptrace.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c index 9a0d24c..8d5d4e9 100644 --- a/arch/powerpc/kernel/ptrace.c +++ b/arch/powerpc/kernel/ptrace.c @@ -1554,8 +1554,8 @@ long arch_ptrace(struct task_struct *child, long request, flush_fp_to_thread(child); if (fpidx < (PT_FPSCR - PT_FPR0)) - tmp = ((unsigned long *)child->thread.fpr) - [fpidx * TS_FPRWIDTH]; + memcpy(&tmp, &child->thread.TS_FPR(fpidx), + sizeof(long)); else tmp = child->thread.fpscr.val; } @@ -1587,8 +1587,8 @@ long arch_ptrace(struct task_struct *child, long request, flush_fp_to_thread(child); if (fpidx < (PT_FPSCR - PT_FPR0)) - ((unsigned long *)child->thread.fpr) - [fpidx * TS_FPRWIDTH] = data; + memcpy(&child->thread.TS_FPR(fpidx), &data, + sizeof(long)); else child->thread.fpscr.val = data; ret = 0; |