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support PTRACE_GETREGS

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This commit is contained in:
Tomoki Shirasawa
2014-10-10 13:58:42 +09:00
parent 4b46330624
commit fef946e5ff
2 changed files with 91 additions and 1 deletions
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53
kernel/syscall.c
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@ -2378,6 +2378,27 @@ out:
return error;
}
static long ptrace_pokeuser(int pid, long addr, long data)
{
long rc = -EIO;
struct process *child;
ihk_spinlock_t *savelock;
unsigned long irqstate;
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((char *)child->userp + addr, &data, 8);
rc = 0;
}
ihk_mc_spinlock_unlock(savelock, irqstate);
return rc;
}
static long ptrace_peekuser(int pid, long addr)
{
long rc = -EIO;
@ -2385,7 +2406,7 @@ static long ptrace_peekuser(int pid, long addr)
ihk_spinlock_t *savelock;
unsigned long irqstate;
if(addr > sizeof(struct user) || addr < 0)
if(addr > sizeof(struct user) - 8|| addr < 0)
return -EFAULT;
child = findthread_and_lock(pid, -1, &savelock, &irqstate);
if (!child)
@ -2397,6 +2418,28 @@ static long ptrace_peekuser(int pid, long addr)
return rc;
}
static long ptrace_getregs(int pid, long data)
{
struct user_regs_struct *regs = (struct user_regs_struct *)data;
long rc = -EIO;
struct process *child;
ihk_spinlock_t *savelock;
unsigned long irqstate;
child = findthread_and_lock(pid, -1, &savelock, &irqstate);
if (!child)
return -ESRCH;
if(child->status == PS_TRACED){
if(copy_to_user(child, regs, child->userp, sizeof(struct user_regs_struct)))
rc = -EFAULT;
else
rc = 0;
}
ihk_mc_spinlock_unlock(savelock, irqstate);
return rc;
}
SYSCALL_DECLARE(ptrace)
{
const long request = (long)ihk_mc_syscall_arg0(ctx);
@ -2415,10 +2458,18 @@ SYSCALL_DECLARE(ptrace)
dkprintf("ptrace: PTRACE_KILL/CONT\n");
error = ptrace_wakeup_sig(pid, request, data);
break;
case PTRACE_GETREGS:
error = ptrace_getregs(pid, data);
dkprintf("PTRACE_GETREGS: data=%p return=%p\n", data, error);
break;
case PTRACE_PEEKUSER:
error = ptrace_peekuser(pid, addr);
dkprintf("PTRACE_PEEKUSER: addr=%p return=%p\n", addr, error);
break;
case PTRACE_POKEUSER:
error = ptrace_pokeuser(pid, addr, data);
dkprintf("PTRACE_POKEUSER: addr=%p data=%p return=%p\n", addr, data, error);
break;
default:
dkprintf("ptrace: unimplemented ptrace called.\n");
break;