diff options
Diffstat (limited to 'arch/cris/arch-v32/kernel/ptrace.c')
| -rw-r--r-- | arch/cris/arch-v32/kernel/ptrace.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/arch/cris/arch-v32/kernel/ptrace.c b/arch/cris/arch-v32/kernel/ptrace.c index 3e058a121753..511ece94a574 100644 --- a/arch/cris/arch-v32/kernel/ptrace.c +++ b/arch/cris/arch-v32/kernel/ptrace.c @@ -130,6 +130,7 @@ 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) { @@ -164,10 +165,10 @@ 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; } @@ -181,19 +182,17 @@ 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_CCS) { + if (regno == PT_CCS) { /* don't allow the tracing process to change stuff like * interrupt enable, kernel/user bit, dma enables etc. */ data &= CCS_MASK; data |= get_reg(child, PT_CCS) & ~CCS_MASK; } - if (put_reg(child, addr, data)) + if (put_reg(child, regno, data)) break; ret = 0; break; |