X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=arch%2Fmips%2Fkernel%2Fptrace.c;h=f3106d0771b0707ba21a767c32ed852530bc78d9;hb=41c594ab65fc89573af296d192aa5235d09717ab;hp=510da5fda567e55317e333f179a60eeb35bd039b;hpb=3b621ee5df437d3f332a635ab6421aaa61a7dc2b;p=deliverable%2Flinux.git

diff --git a/arch/mips/kernel/ptrace.c b/arch/mips/kernel/ptrace.c
index 510da5fda567..f3106d0771b0 100644
--- a/arch/mips/kernel/ptrace.c
+++ b/arch/mips/kernel/ptrace.c
@@ -64,8 +64,7 @@ int ptrace_getregs (struct task_struct *child, __s64 __user *data)
 	if (!access_ok(VERIFY_WRITE, data, 38 * 8))
 		return -EIO;
 
-	regs = (struct pt_regs *) ((unsigned long) child->thread_info +
-	       THREAD_SIZE - 32 - sizeof(struct pt_regs));
+	regs = task_pt_regs(child);
 
 	for (i = 0; i < 32; i++)
 		__put_user (regs->regs[i], data + i);
@@ -92,8 +91,7 @@ int ptrace_setregs (struct task_struct *child, __s64 __user *data)
 	if (!access_ok(VERIFY_READ, data, 38 * 8))
 		return -EIO;
 
-	regs = (struct pt_regs *) ((unsigned long) child->thread_info +
-	       THREAD_SIZE - 32 - sizeof(struct pt_regs));
+	regs = task_pt_regs(child);
 
 	for (i = 0; i < 32; i++)
 		__get_user (regs->regs[i], data + i);
@@ -198,8 +196,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 		struct pt_regs *regs;
 		unsigned long tmp = 0;
 
-		regs = (struct pt_regs *) ((unsigned long) child->thread_info +
-		       THREAD_SIZE - 32 - sizeof(struct pt_regs));
+		regs = task_pt_regs(child);
 		ret = 0;  /* Default return value. */
 
 		switch (addr) {
@@ -251,10 +248,20 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 			break;
 		case FPC_EIR: {	/* implementation / version register */
 			unsigned int flags;
+#ifdef CONFIG_MIPS_MT_SMTC
+			unsigned int irqflags;
+			unsigned int mtflags;
+#endif /* CONFIG_MIPS_MT_SMTC */
 
 			if (!cpu_has_fpu)
 				break;
 
+#ifdef CONFIG_MIPS_MT_SMTC
+			/* Read-modify-write of Status must be atomic */
+			local_irq_save(irqflags);
+			mtflags = dmt();
+#endif /* CONFIG_MIPS_MT_SMTC */
+
 			preempt_disable();
 			if (cpu_has_mipsmt) {
 				unsigned int vpflags = dvpe();
@@ -269,6 +276,10 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 				__asm__ __volatile__("cfc1\t%0,$0": "=r" (tmp));
 				write_c0_status(flags);
 			}
+#ifdef CONFIG_MIPS_MT_SMTC
+			emt(mtflags);
+			local_irq_restore(irqflags);
+#endif /* CONFIG_MIPS_MT_SMTC */
 			preempt_enable();
 			break;
 		}
@@ -280,12 +291,8 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 				ret = -EIO;
 				goto out;
 			}
-			if (child->thread.dsp.used_dsp) {
-				dregs = __get_dsp_regs(child);
-				tmp = (unsigned long) (dregs[addr - DSP_BASE]);
-			} else {
-				tmp = -1;	/* DSP registers yet used  */
-			}
+			dregs = __get_dsp_regs(child);
+			tmp = (unsigned long) (dregs[addr - DSP_BASE]);
 			break;
 		}
 		case DSP_CONTROL:
@@ -318,8 +325,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 	case PTRACE_POKEUSR: {
 		struct pt_regs *regs;
 		ret = 0;
-		regs = (struct pt_regs *) ((unsigned long) child->thread_info +
-		       THREAD_SIZE - 32 - sizeof(struct pt_regs));
+		regs = task_pt_regs(child);
 
 		switch (addr) {
 		case 0 ... 31:
@@ -446,7 +452,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 		break;
 
 	case PTRACE_GET_THREAD_AREA:
-		ret = put_user(child->thread_info->tp_value,
+		ret = put_user(task_thread_info(child)->tp_value,
 				(unsigned long __user *) data);
 		break;