MIPS: Use compat_sys_ptrace
This replaces mips's sys_ptrace32 with a compat_arch_ptrace and
enables the new generic definition of compat_sys_ptrace instead.
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/kernel/ptrace32.c b/arch/mips/kernel/ptrace32.c
index 76818be..cac56a8 100644
--- a/arch/mips/kernel/ptrace32.c
+++ b/arch/mips/kernel/ptrace32.c
@@ -15,6 +15,7 @@
* binaries.
*/
#include <linux/compiler.h>
+#include <linux/compat.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/mm.h>
@@ -46,37 +47,13 @@
* Tracing a 32-bit process with a 64-bit strace and vice versa will not
* work. I don't know how to fix this.
*/
-asmlinkage int sys32_ptrace(int request, int pid, int addr, int data)
+long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
+ compat_ulong_t caddr, compat_ulong_t cdata)
{
- struct task_struct *child;
+ int addr = caddr;
+ int data = cdata;
int ret;
-#if 0
- printk("ptrace(r=%d,pid=%d,addr=%08lx,data=%08lx)\n",
- (int) request, (int) pid, (unsigned long) addr,
- (unsigned long) data);
-#endif
- lock_kernel();
- if (request == PTRACE_TRACEME) {
- ret = ptrace_traceme();
- goto out;
- }
-
- child = ptrace_get_task_struct(pid);
- if (IS_ERR(child)) {
- ret = PTR_ERR(child);
- goto out;
- }
-
- if (request == PTRACE_ATTACH) {
- ret = ptrace_attach(child);
- goto out_tsk;
- }
-
- ret = ptrace_check_attach(child, request == PTRACE_KILL);
- if (ret < 0)
- goto out_tsk;
-
switch (request) {
/* when I and D space are separate, these will need to be fixed. */
case PTRACE_PEEKTEXT: /* read word at location addr. */
@@ -214,7 +191,7 @@
if (!cpu_has_dsp) {
tmp = 0;
ret = -EIO;
- goto out_tsk;
+ goto out;
}
dregs = __get_dsp_regs(child);
tmp = (unsigned long) (dregs[addr - DSP_BASE]);
@@ -224,14 +201,14 @@
if (!cpu_has_dsp) {
tmp = 0;
ret = -EIO;
- goto out_tsk;
+ goto out;
}
tmp = child->thread.dsp.dspcontrol;
break;
default:
tmp = 0;
ret = -EIO;
- goto out_tsk;
+ goto out;
}
ret = put_user(tmp, (unsigned __user *) (unsigned long) data);
break;
@@ -414,10 +391,6 @@
ret = ptrace_request(child, request, addr, data);
break;
}
-
-out_tsk:
- put_task_struct(child);
out:
- unlock_kernel();
return ret;
}
diff --git a/arch/mips/kernel/scall64-n32.S b/arch/mips/kernel/scall64-n32.S
index da7f1b6..324c549 100644
--- a/arch/mips/kernel/scall64-n32.S
+++ b/arch/mips/kernel/scall64-n32.S
@@ -219,7 +219,7 @@
PTR compat_sys_getrusage
PTR compat_sys_sysinfo
PTR compat_sys_times
- PTR sys32_ptrace
+ PTR compat_sys_ptrace
PTR sys_getuid /* 6100 */
PTR sys_syslog
PTR sys_getgid
diff --git a/arch/mips/kernel/scall64-o32.S b/arch/mips/kernel/scall64-o32.S
index d7cd1aa..85fedac 100644
--- a/arch/mips/kernel/scall64-o32.S
+++ b/arch/mips/kernel/scall64-o32.S
@@ -231,7 +231,7 @@
PTR sys_setuid
PTR sys_getuid
PTR compat_sys_stime /* 4025 */
- PTR sys32_ptrace
+ PTR compat_sys_ptrace
PTR sys_alarm
PTR sys_ni_syscall /* was sys_fstat */
PTR sys_pause
diff --git a/arch/mips/kernel/signal32.c b/arch/mips/kernel/signal32.c
index 572c610..652709b 100644
--- a/arch/mips/kernel/signal32.c
+++ b/arch/mips/kernel/signal32.c
@@ -482,6 +482,18 @@
return err;
}
+int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from)
+{
+ memset(to, 0, sizeof *to);
+
+ if (copy_from_user(to, from, 3*sizeof(int)) ||
+ copy_from_user(to->_sifields._pad,
+ from->_sifields._pad, SI_PAD_SIZE32))
+ return -EFAULT;
+
+ return 0;
+}
+
asmlinkage void sys32_sigreturn(nabi_no_regargs struct pt_regs regs)
{
struct sigframe32 __user *frame;
diff --git a/include/asm-mips/ptrace.h b/include/asm-mips/ptrace.h
index 786f7e3..c00cca2 100644
--- a/include/asm-mips/ptrace.h
+++ b/include/asm-mips/ptrace.h
@@ -9,6 +9,9 @@
#ifndef _ASM_PTRACE_H
#define _ASM_PTRACE_H
+#ifdef CONFIG_64BIT
+#define __ARCH_WANT_COMPAT_SYS_PTRACE
+#endif
/* 0 - 31 are integer registers, 32 - 63 are fp registers. */
#define FPR_BASE 32