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fix ptrace(PTRACE_PEEKUSER), store register value to *data

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This commit is contained in:
Tomoki Shirasawa
2014-10-14 12:47:35 +09:00
parent a150a19393
commit 8a6ffa8542
1 changed files with 9 additions and 4 deletions
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13
kernel/syscall.c
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@ -2399,20 +2399,25 @@ static long ptrace_pokeuser(int pid, long addr, long data)
return rc;
}
static long ptrace_peekuser(int pid, long addr)
static long ptrace_peekuser(int pid, long addr, long data)
{
long rc = -EIO;
struct process *child;
ihk_spinlock_t *savelock;
unsigned long irqstate;
unsigned long *p = (unsigned long *)data;
if(addr > sizeof(struct user) - 8|| addr < 0)
return -EFAULT;
child = findthread_and_lock(pid, -1, &savelock, &irqstate);
if (!child)
return -ESRCH;
if(child->status == PS_TRACED)
memcpy(&rc, (char *)child->userp + addr, 8);
if(child->status == PS_TRACED){
if(copy_to_user(child, p, (char *)child->userp + addr, 8))
rc = -EFAULT;
else
rc = 0;
}
ihk_mc_spinlock_unlock(savelock, irqstate);
return rc;
@ -2494,7 +2499,7 @@ SYSCALL_DECLARE(ptrace)
dkprintf("PTRACE_GETREGS: data=%p return=%p\n", data, error);
break;
case PTRACE_PEEKUSER:
error = ptrace_peekuser(pid, addr);
error = ptrace_peekuser(pid, addr, data);
dkprintf("PTRACE_PEEKUSER: addr=%p return=%p\n", addr, error);
break;
case PTRACE_POKEUSER: