[S390] Use diag308 subcodes 3 and 6 for reboot and dump when possible.

[powerpc.git] / arch / s390 / kernel / ptrace.c

diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c
index 8f36504..1d81bf9 100644 (file)
--- a/arch/s390/kernel/ptrace.c
+++ b/arch/s390/kernel/ptrace.c
@@ -86,15 +86,13 @@ FixPerRegisters(struct task_struct *task)
                per_info->control_regs.bits.storage_alt_space_ctl = 0;
 }
 
-void
-set_single_step(struct task_struct *task)
+static void set_single_step(struct task_struct *task)
 {
        task->thread.per_info.single_step = 1;
        FixPerRegisters(task);
 }
 
-void
-clear_single_step(struct task_struct *task)
+static void clear_single_step(struct task_struct *task)
 {
        task->thread.per_info.single_step = 0;
        FixPerRegisters(task);
@@ -232,9 +230,9 @@ poke_user(struct task_struct *child, addr_t addr, addr_t data)
                 */
                if (addr == (addr_t) &dummy->regs.psw.mask &&
 #ifdef CONFIG_COMPAT
-                   data != PSW_MASK_MERGE(PSW_USER32_BITS, data) &&
+                   data != PSW_MASK_MERGE(psw_user32_bits, data) &&
 #endif
-                   data != PSW_MASK_MERGE(PSW_USER_BITS, data))
+                   data != PSW_MASK_MERGE(psw_user_bits, data))
                        /* Invalid psw mask. */
                        return -EINVAL;
 #ifndef CONFIG_64BIT
@@ -296,7 +294,6 @@ poke_user(struct task_struct *child, addr_t addr, addr_t data)
 static int
 do_ptrace_normal(struct task_struct *child, long request, long addr, long data)
 {
-       unsigned long tmp;
        ptrace_area parea; 
        int copied, ret;
 
@@ -306,10 +303,7 @@ do_ptrace_normal(struct task_struct *child, long request, long addr, long data)
                /* Remove high order bit from address (only for 31 bit). */
                addr &= PSW_ADDR_INSN;
                /* read word at location addr. */
-               copied = access_process_vm(child, addr, &tmp, sizeof(tmp), 0);
-               if (copied != sizeof(tmp))
-                       return -EIO;
-               return put_user(tmp, (unsigned long __user *) data);
+               return generic_ptrace_peekdata(child, addr, data);
 
        case PTRACE_PEEKUSR:
                /* read the word at location addr in the USER area. */
@@ -320,10 +314,7 @@ do_ptrace_normal(struct task_struct *child, long request, long addr, long data)
                /* Remove high order bit from address (only for 31 bit). */
                addr &= PSW_ADDR_INSN;
                /* write the word at location addr. */
-               copied = access_process_vm(child, addr, &data, sizeof(data),1);
-               if (copied != sizeof(data))
-                       return -EIO;
-               return 0;
+               return generic_ptrace_pokedata(child, addr, data);
 
        case PTRACE_POKEUSR:
                /* write the word at location addr in the USER area */
@@ -331,7 +322,7 @@ do_ptrace_normal(struct task_struct *child, long request, long addr, long data)
 
        case PTRACE_PEEKUSR_AREA:
        case PTRACE_POKEUSR_AREA:
-               if (copy_from_user(&parea, (void __user *) addr,
+               if (copy_from_user(&parea, (void __force __user *) addr,
                                                        sizeof(parea)))
                        return -EFAULT;
                addr = parea.kernel_addr;
@@ -341,10 +332,11 @@ do_ptrace_normal(struct task_struct *child, long request, long addr, long data)
                        if (request == PTRACE_PEEKUSR_AREA)
                                ret = peek_user(child, addr, data);
                        else {
-                               addr_t tmp;
-                               if (get_user (tmp, (addr_t __user *) data))
+                               addr_t utmp;
+                               if (get_user(utmp,
+                                            (addr_t __force __user *) data))
                                        return -EFAULT;
-                               ret = poke_user(child, addr, tmp);
+                               ret = poke_user(child, addr, utmp);
                        }
                        if (ret)
                                return ret;
@@ -394,7 +386,7 @@ peek_user_emu31(struct task_struct *child, addr_t addr, addr_t data)
                if (addr == (addr_t) &dummy32->regs.psw.mask) {
                        /* Fake a 31 bit psw mask. */
                        tmp = (__u32)(task_pt_regs(child)->psw.mask >> 32);
-                       tmp = PSW32_MASK_MERGE(PSW32_USER_BITS, tmp);
+                       tmp = PSW32_MASK_MERGE(psw32_user_bits, tmp);
                } else if (addr == (addr_t) &dummy32->regs.psw.addr) {
                        /* Fake a 31 bit psw address. */
                        tmp = (__u32) task_pt_regs(child)->psw.addr |
@@ -469,11 +461,11 @@ poke_user_emu31(struct task_struct *child, addr_t addr, addr_t data)
                 */
                if (addr == (addr_t) &dummy32->regs.psw.mask) {
                        /* Build a 64 bit psw mask from 31 bit mask. */
-                       if (tmp != PSW32_MASK_MERGE(PSW32_USER_BITS, tmp))
+                       if (tmp != PSW32_MASK_MERGE(psw32_user_bits, tmp))
                                /* Invalid psw mask. */
                                return -EINVAL;
                        task_pt_regs(child)->psw.mask =
-                               PSW_MASK_MERGE(PSW_USER32_BITS, (__u64) tmp << 32);
+                               PSW_MASK_MERGE(psw_user32_bits, (__u64) tmp << 32);
                } else if (addr == (addr_t) &dummy32->regs.psw.addr) {
                        /* Build a 64 bit psw address from 31 bit address. */
                        task_pt_regs(child)->psw.addr =
@@ -550,7 +542,7 @@ do_ptrace_emu31(struct task_struct *child, long request, long addr, long data)
                copied = access_process_vm(child, addr, &tmp, sizeof(tmp), 0);
                if (copied != sizeof(tmp))
                        return -EIO;
-               return put_user(tmp, (unsigned int __user *) data);
+               return put_user(tmp, (unsigned int __force __user *) data);
 
        case PTRACE_PEEKUSR:
                /* read the word at location addr in the USER area. */
@@ -571,7 +563,7 @@ do_ptrace_emu31(struct task_struct *child, long request, long addr, long data)
 
        case PTRACE_PEEKUSR_AREA:
        case PTRACE_POKEUSR_AREA:
-               if (copy_from_user(&parea, (void __user *) addr,
+               if (copy_from_user(&parea, (void __force __user *) addr,
                                                        sizeof(parea)))
                        return -EFAULT;
                addr = parea.kernel_addr;
@@ -581,10 +573,11 @@ do_ptrace_emu31(struct task_struct *child, long request, long addr, long data)
                        if (request == PTRACE_PEEKUSR_AREA)
                                ret = peek_user_emu31(child, addr, data);
                        else {
-                               __u32 tmp;
-                               if (get_user (tmp, (__u32 __user *) data))
+                               __u32 utmp;
+                               if (get_user(utmp,
+                                            (__u32 __force __user *) data))
                                        return -EFAULT;
-                               ret = poke_user_emu31(child, addr, tmp);
+                               ret = poke_user_emu31(child, addr, utmp);
                        }
                        if (ret)
                                return ret;
@@ -595,17 +588,19 @@ do_ptrace_emu31(struct task_struct *child, long request, long addr, long data)
                return 0;
        case PTRACE_GETEVENTMSG:
                return put_user((__u32) child->ptrace_message,
-                               (unsigned int __user *) data);
+                               (unsigned int __force __user *) data);
        case PTRACE_GETSIGINFO:
                if (child->last_siginfo == NULL)
                        return -EINVAL;
-               return copy_siginfo_to_user32((compat_siginfo_t __user *) data,
+               return copy_siginfo_to_user32((compat_siginfo_t
+                                              __force __user *) data,
                                              child->last_siginfo);
        case PTRACE_SETSIGINFO:
                if (child->last_siginfo == NULL)
                        return -EINVAL;
                return copy_siginfo_from_user32(child->last_siginfo,
-                                               (compat_siginfo_t __user *) data);
+                                               (compat_siginfo_t
+                                                __force __user *) data);
        }
        return ptrace_request(child, request, addr, data);
 }
@@ -688,11 +683,6 @@ do_ptrace(struct task_struct *child, long request, long addr, long data)
                wake_up_process(child);
                return 0;
 
-       case PTRACE_DETACH:
-               /* detach a process that was attached. */
-               return ptrace_detach(child, data);
-
-
        /* Do requests that differ for 31/64 bit */
        default:
 #ifdef CONFIG_COMPAT