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authorThomas Bogendoerfer <tsbogend@alpha.franken.de>2008-08-17 16:49:25 +0200
committerRalf Baechle <ralf@linux-mips.org>2008-10-11 16:18:41 +0100
commit5d9a76cd0ed367d01b0b237253adb7607e86a277 (patch)
tree1c239a7cc3044a6ddc077148e97c1182aa8eb065 /arch/mips/kernel
parentb922df7383749a1c0b7ea64c50fa839263d3816b (diff)
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>
Diffstat (limited to 'arch/mips/kernel')
-rw-r--r--arch/mips/kernel/ptrace32.c43
-rw-r--r--arch/mips/kernel/scall64-n32.S2
-rw-r--r--arch/mips/kernel/scall64-o32.S2
-rw-r--r--arch/mips/kernel/signal32.c12
4 files changed, 22 insertions, 37 deletions
diff --git a/arch/mips/kernel/ptrace32.c b/arch/mips/kernel/ptrace32.c
index 76818be6ba7..cac56a8c867 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 @@ int ptrace_setfpregs(struct task_struct *child, __u32 __user *data);
* 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 @@ asmlinkage int sys32_ptrace(int request, int pid, int addr, int data)
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 @@ asmlinkage int sys32_ptrace(int request, int pid, int addr, int data)
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 @@ asmlinkage int sys32_ptrace(int request, int pid, int addr, int data)
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 da7f1b6ea0f..324c5499dec 100644
--- a/arch/mips/kernel/scall64-n32.S
+++ b/arch/mips/kernel/scall64-n32.S
@@ -219,7 +219,7 @@ EXPORT(sysn32_call_table)
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 d7cd1aac9ad..85fedac99a5 100644
--- a/arch/mips/kernel/scall64-o32.S
+++ b/arch/mips/kernel/scall64-o32.S
@@ -231,7 +231,7 @@ sys_call_table:
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 572c610db1b..652709b353a 100644
--- a/arch/mips/kernel/signal32.c
+++ b/arch/mips/kernel/signal32.c
@@ -482,6 +482,18 @@ int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from)
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;