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| author | Roland McGrath <roland@redhat.com> | 2008-03-13 19:25:35 +1100 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2008-03-20 10:10:56 +1100 |
| commit | c2372eb9bcafdd149b26987a8c25bbed92fd2775 (patch) | |
| tree | 8e32ac8e467593c333cfed402fdb766cba80308a /arch | |
| parent | 264e3e889d86e552b4191d69bb60f4f3b383135a (diff) | |
| download | linux-c2372eb9bcafdd149b26987a8c25bbed92fd2775.tar.gz linux-c2372eb9bcafdd149b26987a8c25bbed92fd2775.tar.bz2 linux-c2372eb9bcafdd149b26987a8c25bbed92fd2775.zip | |
[POWERPC] user_regset PTRACE_SETREGS regression fix
The PTRACE_SETREGS request was only recently added on powerpc,
and gdb does not use it. So it slipped through without getting
all the testing it should have had.
The user_regset changes had a simple bug in storing to all of
the 32-bit general registers block on 64-bit kernels. This bug
only comes up with PTRACE_SETREGS, not PPC_PTRACE_SETREGS.
It causes a BUG_ON to hit, so this fix needs to go in ASAP.
Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/kernel/ptrace.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c index 7673e9865733..2a9fe97e4521 100644 --- a/arch/powerpc/kernel/ptrace.c +++ b/arch/powerpc/kernel/ptrace.c @@ -530,15 +530,21 @@ static int gpr32_set(struct task_struct *target, --count; } - if (kbuf) + if (kbuf) { for (; count > 0 && pos <= PT_MAX_PUT_REG; --count) regs[pos++] = *k++; - else + for (; count > 0 && pos < PT_TRAP; --count, ++pos) + ++k; + } else { for (; count > 0 && pos <= PT_MAX_PUT_REG; --count) { if (__get_user(reg, u++)) return -EFAULT; regs[pos++] = reg; } + for (; count > 0 && pos < PT_TRAP; --count, ++pos) + if (__get_user(reg, u++)) + return -EFAULT; + } if (count > 0 && pos == PT_TRAP) { if (kbuf) |