diff options
| author | Namhyung Kim <namhyung@gmail.com> | 2010-10-27 15:33:51 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-27 18:03:10 -0700 |
| commit | 475a4b813816fe9af4cdf7833799036b679f46d0 (patch) | |
| tree | 8147812d582934768f7425c415e14019901ff302 /arch/cris/arch-v10 | |
| parent | aeebd3a3d9f5b67a254f04e6eac91a74c5e1065e (diff) | |
ptrace: cleanup arch_ptrace() on cris
Use new 'regno' variable in order to remove redandunt expression and
remove checking @addr less than 0 because @addr is now unsigned. Also
update 'datap' on PTRACE_GET/SETREGS to fix a bug on arch-v10.
Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Acked-by: Mikael Starvik <starvik@axis.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/cris/arch-v10')
| -rw-r--r-- | arch/cris/arch-v10/kernel/ptrace.c | 17 |
1 files changed, 8 insertions, 9 deletions
diff --git a/arch/cris/arch-v10/kernel/ptrace.c b/arch/cris/arch-v10/kernel/ptrace.c index d411e024e05..320065f3cbe 100644 --- a/arch/cris/arch-v10/kernel/ptrace.c +++ b/arch/cris/arch-v10/kernel/ptrace.c @@ -80,6 +80,7 @@ long arch_ptrace(struct task_struct *child, long request, unsigned long addr, unsigned long data) { int ret; + unsigned int regno = addr >> 2; unsigned long __user *datap = (unsigned long __user *)data; switch (request) { @@ -94,10 +95,10 @@ long arch_ptrace(struct task_struct *child, long request, unsigned long tmp; ret = -EIO; - if ((addr & 3) || addr < 0 || addr > PT_MAX << 2) + if ((addr & 3) || regno > PT_MAX) break; - tmp = get_reg(child, addr >> 2); + tmp = get_reg(child, regno); ret = put_user(tmp, datap); break; } @@ -111,19 +112,17 @@ long arch_ptrace(struct task_struct *child, long request, /* Write the word at location address in the USER area. */ case PTRACE_POKEUSR: ret = -EIO; - if ((addr & 3) || addr < 0 || addr > PT_MAX << 2) + if ((addr & 3) || regno > PT_MAX) break; - addr >>= 2; - - if (addr == PT_DCCR) { + if (regno == PT_DCCR) { /* don't allow the tracing process to change stuff like * interrupt enable, kernel/user bit, dma enables etc. */ data &= DCCR_MASK; data |= get_reg(child, PT_DCCR) & ~DCCR_MASK; } - if (put_reg(child, addr, data)) + if (put_reg(child, regno, data)) break; ret = 0; break; @@ -142,7 +141,7 @@ long arch_ptrace(struct task_struct *child, long request, break; } - data += sizeof(unsigned long); + datap++; } break; @@ -166,7 +165,7 @@ long arch_ptrace(struct task_struct *child, long request, } put_reg(child, i, tmp); - data += sizeof(unsigned long); + datap++; } break; |