X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Fsh64%2Fkernel%2Fptrace.c;h=4e95e18b46d90308fa01093bb27f5aa2c80c9f15;hb=97bf2856c6014879bd04983a3e9dfcdac1e7fe85;hp=c48bc4a27b44b459d3c95ea55b00bc98f2f967ec;hpb=c7b5ebbddf7bcd3651947760f423e3783bbe6573;p=linux-2.6.git

diff --git a/arch/sh64/kernel/ptrace.c b/arch/sh64/kernel/ptrace.c
index c48bc4a27..4e95e18b4 100644
--- a/arch/sh64/kernel/ptrace.c
+++ b/arch/sh64/kernel/ptrace.c
@@ -17,7 +17,6 @@
  *
  */
 
-#include <linux/config.h>
 #include <linux/kernel.h>
 #include <linux/rwsem.h>
 #include <linux/sched.h>
@@ -27,6 +26,8 @@
 #include <linux/errno.h>
 #include <linux/ptrace.h>
 #include <linux/user.h>
+#include <linux/signal.h>
+#include <linux/syscalls.h>
 
 #include <asm/io.h>
 #include <asm/uaccess.h>
@@ -63,7 +64,7 @@ get_fpu_long(struct task_struct *task, unsigned long addr)
 	struct pt_regs *regs;
 	regs = (struct pt_regs*)((unsigned char *)task + THREAD_SIZE) - 1;
 
-	if (!task->used_math) {
+	if (!tsk_used_math(task)) {
 		if (addr == offsetof(struct user_fpu_struct, fpscr)) {
 			tmp = FPSCR_INIT;
 		} else {
@@ -105,9 +106,9 @@ put_fpu_long(struct task_struct *task, unsigned long addr, unsigned long data)
 
 	regs = (struct pt_regs*)((unsigned char *)task + THREAD_SIZE) - 1;
 
-	if (!task->used_math) {
+	if (!tsk_used_math(task)) {
 		fpinit(&task->thread.fpu.hard);
-		task->used_math = 1;
+		set_stopped_child_used_math(task);
 	} else if (last_task_used_math == task) {
 		grab_fpu();
 		fpsave(&task->thread.fpu.hard);
@@ -120,44 +121,11 @@ put_fpu_long(struct task_struct *task, unsigned long addr, unsigned long data)
 	return 0;
 }
 
-asmlinkage int sys_ptrace(long request, long pid, long addr, long data)
+
+long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 {
-	struct task_struct *child;
 	int ret;
 
-	lock_kernel();
-	ret = -EPERM;
-	if (request == PTRACE_TRACEME) {
-		/* are we already being traced? */
-		if (current->ptrace & PT_PTRACED)
-			goto out;
-		/* set the ptrace bit in the process flags. */
-		current->ptrace |= PT_PTRACED;
-		ret = 0;
-		goto out;
-	}
-	ret = -ESRCH;
-	read_lock(&tasklist_lock);
-	child = find_task_by_pid(pid);
-	if (child)
-		get_task_struct(child);
-	read_unlock(&tasklist_lock);
-	if (!child)
-		goto out;
-
-	ret = -EPERM;
-	if (pid == 1)		/* you may not mess with init */
-		goto out_tsk;
-
-	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. */
@@ -187,7 +155,7 @@ asmlinkage int sys_ptrace(long request, long pid, long addr, long data)
 			 (addr <  offsetof(struct user, u_fpvalid))) {
 			tmp = get_fpu_long(child, addr - offsetof(struct user, fpu));
 		} else if (addr == offsetof(struct user, u_fpvalid)) {
-			tmp = child->used_math;
+			tmp = !!tsk_used_math(child);
 		} else {
 			break;
 		}
@@ -238,7 +206,7 @@ asmlinkage int sys_ptrace(long request, long pid, long addr, long data)
 	case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */
 	case PTRACE_CONT: { /* restart after signal. */
 		ret = -EIO;
-		if ((unsigned long) data > _NSIG)
+		if (!valid_signal(data))
 			break;
 		if (request == PTRACE_SYSCALL)
 			set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
@@ -257,7 +225,7 @@ asmlinkage int sys_ptrace(long request, long pid, long addr, long data)
  */
 	case PTRACE_KILL: {
 		ret = 0;
-		if (child->state == TASK_ZOMBIE)	/* already dead */
+		if (child->exit_state == EXIT_ZOMBIE)	/* already dead */
 			break;
 		child->exit_code = SIGKILL;
 		wake_up_process(child);
@@ -268,7 +236,7 @@ asmlinkage int sys_ptrace(long request, long pid, long addr, long data)
 		struct pt_regs *regs;
 
 		ret = -EIO;
-		if ((unsigned long) data > _NSIG)
+		if (!valid_signal(data))
 			break;
 		clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
 		if ((child->ptrace & PT_DTRACE) == 0) {
@@ -295,13 +263,33 @@ asmlinkage int sys_ptrace(long request, long pid, long addr, long data)
 		ret = ptrace_request(child, request, addr, data);
 		break;
 	}
-out_tsk:
-	put_task_struct(child);
-out:
-	unlock_kernel();
 	return ret;
 }
 
+asmlinkage int sh64_ptrace(long request, long pid, long addr, long data)
+{
+	extern void poke_real_address_q(unsigned long long addr, unsigned long long data);
+#define WPC_DBRMODE 0x0d104008
+	static int first_call = 1;
+
+	lock_kernel();
+	if (first_call) {
+		/* Set WPC.DBRMODE to 0.  This makes all debug events get
+		 * delivered through RESVEC, i.e. into the handlers in entry.S.
+		 * (If the kernel was downloaded using a remote gdb, WPC.DBRMODE
+		 * would normally be left set to 1, which makes debug events get
+		 * delivered through DBRVEC, i.e. into the remote gdb's
+		 * handlers.  This prevents ptrace getting them, and confuses
+		 * the remote gdb.) */
+		printk("DBRMODE set to 0 to permit native debugging\n");
+		poke_real_address_q(WPC_DBRMODE, 0);
+		first_call = 0;
+	}
+	unlock_kernel();
+
+	return sys_ptrace(request, pid, addr, data);
+}
+
 asmlinkage void syscall_trace(void)
 {
 	struct task_struct *tsk = current;