commit 680973edf122fd95735ecfc077cf79645d2e5081
author Shaohua Li <shaohua.li@intel.com> Thu Sep 18 15:50:26 2008 +0800
committer Tony Luck <tony.luck@intel.com> Mon Oct 06 10:45:29 2008 -0700
tree 8023bf84c6e856f616215082d05bb91ec8e1b620
parent 9690ad031290d86979b284bd6243313f58271bcc

[IA64] utrace Convert compat ptrace to use compat_sys_ptrace

Convert IA64 32-bit ptrace to use compat_sys_ptrace.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

arch/ia64/include/asm/syscall.h

diff --git a/arch/ia64/include/asm/syscall.h b/arch/ia64/include/asm/syscall.h
index 3fd4fa6..2f758a4 100644
--- a/arch/ia64/include/asm/syscall.h
+++ b/arch/ia64/include/asm/syscall.h
@@ -19,24 +19,35 @@
 static inline long syscall_get_nr(struct task_struct *task,
 				  struct pt_regs *regs)
 {
-	BUG_ON(IS_IA32_PROCESS(regs));
-
 	if ((long)regs->cr_ifs < 0) /* Not a syscall */
 		return -1;
+
+#ifdef CONFIG_IA32_SUPPORT
+	if (IS_IA32_PROCESS(regs))
+		return regs->r1;
+#endif
+
 	return regs->r15;
 }
 
 static inline void syscall_rollback(struct task_struct *task,
 				    struct pt_regs *regs)
 {
-	BUG_ON(IS_IA32_PROCESS(regs));
+#ifdef CONFIG_IA32_SUPPORT
+	if (IS_IA32_PROCESS(regs))
+		regs->r8 = regs->r1;
+#endif
+
 	/* do nothing */
 }
 
 static inline long syscall_get_error(struct task_struct *task,
 				     struct pt_regs *regs)
 {
-	BUG_ON(IS_IA32_PROCESS(regs));
+#ifdef CONFIG_IA32_SUPPORT
+	if (IS_IA32_PROCESS(regs))
+		return regs->r8;
+#endif
 
 	return regs->r10 == -1 ? regs->r8:0;
 }
@@ -44,8 +55,6 @@
 static inline long syscall_get_return_value(struct task_struct *task,
 					    struct pt_regs *regs)
 {
-	BUG_ON(IS_IA32_PROCESS(regs));
-
 	return regs->r8;
 }
 
@@ -53,7 +62,12 @@
 					    struct pt_regs *regs,
 					    int error, long val)
 {
-	BUG_ON(IS_IA32_PROCESS(regs));
+#ifdef CONFIG_IA32_SUPPORT
+	if (IS_IA32_PROCESS(regs)) {
+		regs->r8 = (long) error ? error : val;
+		return;
+	}
+#endif
 
 	if (error) {
 		/* error < 0, but ia64 uses > 0 return value */
@@ -73,9 +87,39 @@
 					 unsigned int i, unsigned int n,
 					 unsigned long *args)
 {
-	BUG_ON(IS_IA32_PROCESS(regs));
 	BUG_ON(i + n > 6);
 
+#ifdef CONFIG_IA32_SUPPORT
+	if (IS_IA32_PROCESS(regs)) {
+		switch (i + n) {
+		case 6:
+			if (!n--) break;
+			*args++ = regs->r13;
+		case 5:
+			if (!n--) break;
+			*args++ = regs->r15;
+		case 4:
+			if (!n--) break;
+			*args++ = regs->r14;
+		case 3:
+			if (!n--) break;
+			*args++ = regs->r10;
+		case 2:
+			if (!n--) break;
+			*args++ = regs->r9;
+		case 1:
+			if (!n--) break;
+			*args++ = regs->r11;
+		case 0:
+			if (!n--) break;
+		default:
+			BUG();
+			break;
+		}
+
+		return;
+	}
+#endif
 	ia64_syscall_get_set_arguments(task, regs, i, n, args, 0);
 }
 
@@ -84,9 +128,36 @@
 					 unsigned int i, unsigned int n,
 					 unsigned long *args)
 {
-	BUG_ON(IS_IA32_PROCESS(regs));
 	BUG_ON(i + n > 6);
 
+#ifdef CONFIG_IA32_SUPPORT
+	if (IS_IA32_PROCESS(regs)) {
+		switch (i + n) {
+		case 6:
+			if (!n--) break;
+			regs->r13 = *args++;
+		case 5:
+			if (!n--) break;
+			regs->r15 = *args++;
+		case 4:
+			if (!n--) break;
+			regs->r14 = *args++;
+		case 3:
+			if (!n--) break;
+			regs->r10 = *args++;
+		case 2:
+			if (!n--) break;
+			regs->r9 = *args++;
+		case 1:
+			if (!n--) break;
+			regs->r11 = *args++;
+		case 0:
+			if (!n--) break;
+		}
+
+		return;
+	}
+#endif
 	ia64_syscall_get_set_arguments(task, regs, i, n, args, 1);
 }
 #endif	/* _ASM_SYSCALL_H */