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Diffstat (limited to 'arch/powerpc/kernel/ptrace32.c')
-rw-r--r--arch/powerpc/kernel/ptrace32.c204
1 files changed, 87 insertions, 117 deletions
diff --git a/arch/powerpc/kernel/ptrace32.c b/arch/powerpc/kernel/ptrace32.c
index 1bf1f450e1ab..98b1580a2bc2 100644
--- a/arch/powerpc/kernel/ptrace32.c
+++ b/arch/powerpc/kernel/ptrace32.c
@@ -41,6 +41,50 @@
* in exit.c or in signal.c.
*/
+/*
+ * Here are the old "legacy" powerpc specific getregs/setregs ptrace calls,
+ * we mark them as obsolete now, they will be removed in a future version
+ */
+static long compat_ptrace_old(struct task_struct *child, long request,
+ long addr, long data)
+{
+ int ret = -EPERM;
+
+ switch(request) {
+ case PPC_PTRACE_GETREGS: { /* Get GPRs 0 - 31. */
+ int i;
+ unsigned long *reg = &((unsigned long *)child->thread.regs)[0];
+ unsigned int __user *tmp = (unsigned int __user *)addr;
+
+ for (i = 0; i < 32; i++) {
+ ret = put_user(*reg, tmp);
+ if (ret)
+ break;
+ reg++;
+ tmp++;
+ }
+ break;
+ }
+
+ case PPC_PTRACE_SETREGS: { /* Set GPRs 0 - 31. */
+ int i;
+ unsigned long *reg = &((unsigned long *)child->thread.regs)[0];
+ unsigned int __user *tmp = (unsigned int __user *)addr;
+
+ for (i = 0; i < 32; i++) {
+ ret = get_user(*reg, tmp);
+ if (ret)
+ break;
+ reg++;
+ tmp++;
+ }
+ break;
+ }
+
+ }
+ return ret;
+}
+
long compat_sys_ptrace(int request, int pid, unsigned long addr,
unsigned long data)
{
@@ -280,52 +324,6 @@ long compat_sys_ptrace(int request, int pid, unsigned long addr,
break;
}
- case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */
- case PTRACE_CONT: { /* restart after signal. */
- ret = -EIO;
- if (!valid_signal(data))
- break;
- if (request == PTRACE_SYSCALL)
- set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
- else
- clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
- child->exit_code = data;
- /* make sure the single step bit is not set. */
- clear_single_step(child);
- wake_up_process(child);
- ret = 0;
- break;
- }
-
- /*
- * make the child exit. Best I can do is send it a sigkill.
- * perhaps it should be put in the status that it wants to
- * exit.
- */
- case PTRACE_KILL: {
- ret = 0;
- if (child->exit_state == EXIT_ZOMBIE) /* already dead */
- break;
- child->exit_code = SIGKILL;
- /* make sure the single step bit is not set. */
- clear_single_step(child);
- wake_up_process(child);
- break;
- }
-
- case PTRACE_SINGLESTEP: { /* set the trap flag. */
- ret = -EIO;
- if (!valid_signal(data))
- break;
- clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
- set_single_step(child);
- child->exit_code = data;
- /* give it a chance to run. */
- wake_up_process(child);
- ret = 0;
- break;
- }
-
case PTRACE_GET_DEBUGREG: {
ret = -EINVAL;
/* We only support one DABR and no IABRS at the moment */
@@ -335,95 +333,67 @@ long compat_sys_ptrace(int request, int pid, unsigned long addr,
break;
}
- case PTRACE_SET_DEBUGREG:
- ret = ptrace_set_debugreg(child, addr, data);
- break;
-
- case PTRACE_DETACH:
- ret = ptrace_detach(child, data);
+ case PTRACE_GETEVENTMSG:
+ ret = put_user(child->ptrace_message, (unsigned int __user *) data);
break;
- case PPC_PTRACE_GETREGS: { /* Get GPRs 0 - 31. */
- int i;
- unsigned long *reg = &((unsigned long *)child->thread.regs)[0];
- unsigned int __user *tmp = (unsigned int __user *)addr;
-
- for (i = 0; i < 32; i++) {
- ret = put_user(*reg, tmp);
- if (ret)
- break;
- reg++;
- tmp++;
+ case PTRACE_GETREGS: { /* Get all pt_regs from the child. */
+ int ui;
+ if (!access_ok(VERIFY_WRITE, (void __user *)data,
+ PT_REGS_COUNT * sizeof(int))) {
+ ret = -EIO;
+ break;
}
- break;
- }
-
- case PPC_PTRACE_SETREGS: { /* Set GPRs 0 - 31. */
- int i;
- unsigned long *reg = &((unsigned long *)child->thread.regs)[0];
- unsigned int __user *tmp = (unsigned int __user *)addr;
-
- for (i = 0; i < 32; i++) {
- ret = get_user(*reg, tmp);
- if (ret)
- break;
- reg++;
- tmp++;
+ ret = 0;
+ for (ui = 0; ui < PT_REGS_COUNT; ui ++) {
+ ret |= __put_user(get_reg(child, ui),
+ (unsigned int __user *) data);
+ data += sizeof(int);
}
break;
}
- case PPC_PTRACE_GETFPREGS: { /* Get FPRs 0 - 31. */
- int i;
- unsigned long *reg = &((unsigned long *)child->thread.fpr)[0];
- unsigned int __user *tmp = (unsigned int __user *)addr;
-
- flush_fp_to_thread(child);
-
- for (i = 0; i < 32; i++) {
- ret = put_user(*reg, tmp);
- if (ret)
- break;
- reg++;
- tmp++;
+ case PTRACE_SETREGS: { /* Set all gp regs in the child. */
+ unsigned long tmp;
+ int ui;
+ if (!access_ok(VERIFY_READ, (void __user *)data,
+ PT_REGS_COUNT * sizeof(int))) {
+ ret = -EIO;
+ break;
}
- break;
- }
-
- case PPC_PTRACE_SETFPREGS: { /* Get FPRs 0 - 31. */
- int i;
- unsigned long *reg = &((unsigned long *)child->thread.fpr)[0];
- unsigned int __user *tmp = (unsigned int __user *)addr;
-
- flush_fp_to_thread(child);
-
- for (i = 0; i < 32; i++) {
- ret = get_user(*reg, tmp);
+ ret = 0;
+ for (ui = 0; ui < PT_REGS_COUNT; ui ++) {
+ ret = __get_user(tmp, (unsigned int __user *) data);
if (ret)
break;
- reg++;
- tmp++;
+ put_reg(child, ui, tmp);
+ data += sizeof(int);
}
break;
}
- case PTRACE_GETEVENTMSG:
- ret = put_user(child->ptrace_message, (unsigned int __user *) data);
- break;
-
-#ifdef CONFIG_ALTIVEC
+ case PTRACE_GETFPREGS:
+ case PTRACE_SETFPREGS:
case PTRACE_GETVRREGS:
- /* Get the child altivec register state. */
- flush_altivec_to_thread(child);
- ret = get_vrregs((unsigned long __user *)data, child);
+ case PTRACE_SETVRREGS:
+ case PTRACE_GETREGS64:
+ case PTRACE_SETREGS64:
+ case PPC_PTRACE_GETFPREGS:
+ case PPC_PTRACE_SETFPREGS:
+ case PTRACE_KILL:
+ case PTRACE_SINGLESTEP:
+ case PTRACE_DETACH:
+ case PTRACE_SET_DEBUGREG:
+ case PTRACE_SYSCALL:
+ case PTRACE_CONT:
+ ret = arch_ptrace(child, request, addr, data);
break;
- case PTRACE_SETVRREGS:
- /* Set the child altivec register state. */
- flush_altivec_to_thread(child);
- ret = set_vrregs(child, (unsigned long __user *)data);
+ /* Old reverse args ptrace callss */
+ case PPC_PTRACE_GETREGS: /* Get GPRs 0 - 31. */
+ case PPC_PTRACE_SETREGS: /* Set GPRs 0 - 31. */
+ ret = compat_ptrace_old(child, request, addr, data);
break;
-#endif
default:
ret = ptrace_request(child, request, addr, data);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-16 18:39:49 +0000