diff options
Diffstat (limited to 'arch/powerpc/kernel/ptrace32.c')
| -rw-r--r-- | arch/powerpc/kernel/ptrace32.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/arch/powerpc/kernel/ptrace32.c b/arch/powerpc/kernel/ptrace32.c index 4c1de6af4c0..67bf1a1e7e1 100644 --- a/arch/powerpc/kernel/ptrace32.c +++ b/arch/powerpc/kernel/ptrace32.c @@ -64,6 +64,11 @@ static long compat_ptrace_old(struct task_struct *child, long request, return -EPERM; } +/* Macros to workout the correct index for the FPR in the thread struct */ +#define FPRNUMBER(i) (((i) - PT_FPR0) >> 1) +#define FPRHALF(i) (((i) - PT_FPR0) & 1) +#define FPRINDEX(i) TS_FPRWIDTH * FPRNUMBER(i) + FPRHALF(i) + long compat_arch_ptrace(struct task_struct *child, compat_long_t request, compat_ulong_t caddr, compat_ulong_t cdata) { @@ -122,7 +127,8 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request, * to be an array of unsigned int (32 bits) - the * index passed in is based on this assumption. */ - tmp = ((unsigned int *)child->thread.fpr)[index - PT_FPR0]; + tmp = ((unsigned int *)child->thread.fpr) + [FPRINDEX(index)]; } ret = put_user((unsigned int)tmp, (u32 __user *)data); break; @@ -162,7 +168,8 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request, CHECK_FULL_REGS(child->thread.regs); if (numReg >= PT_FPR0) { flush_fp_to_thread(child); - tmp = ((unsigned long int *)child->thread.fpr)[numReg - PT_FPR0]; + tmp = ((unsigned long int *)child->thread.fpr) + [FPRINDEX(numReg)]; } else { /* register within PT_REGS struct */ tmp = ptrace_get_reg(child, numReg); } @@ -217,7 +224,8 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request, * to be an array of unsigned int (32 bits) - the * index passed in is based on this assumption. */ - ((unsigned int *)child->thread.fpr)[index - PT_FPR0] = data; + ((unsigned int *)child->thread.fpr) + [FPRINDEX(index)] = data; ret = 0; } break; |