patch-2.2.15 linux/arch/alpha/kernel/ptrace.c

• Lines: 41
• Date: Fri Apr 21 12:45:44 2000
• Orig file: v2.2.14/arch/alpha/kernel/ptrace.c
• Orig date: Tue Jan 4 21:18:39 2000

diff -u --new-file --recursive --exclude-from ../../exclude v2.2.14/arch/alpha/kernel/ptrace.c linux/arch/alpha/kernel/ptrace.c
@@ -17,6 +17,7 @@
 #include <asm/uaccess.h>
 #include <asm/pgtable.h>
 #include <asm/system.h>
+#include <asm/fpu.h>
 
 #include "proto.h"
 
@@ -119,18 +120,30 @@
 /*
  * Get contents of register REGNO in task TASK.
  */
-static inline long
+static long
 get_reg(struct task_struct * task, unsigned long regno)
 {
+	/* Special hack for fpcr -- combine hardware and software bits.  */
+	if (regno == 63) {
+		unsigned long fpcr = *get_reg_addr(task, regno);
+		unsigned long swcr = task->tss.flags & IEEE_SW_MASK;
+		swcr = swcr_update_status(swcr, fpcr);
+		return fpcr | swcr;
+	}
 	return *get_reg_addr(task, regno);
 }
 
 /*
  * Write contents of register REGNO in task TASK.
  */
-static inline int
+static int
 put_reg(struct task_struct *task, unsigned long regno, long data)
 {
+	if (regno == 63) {
+		task->tss.flags = ((task->tss.flags & ~IEEE_SW_MASK)
+				   | (data & IEEE_SW_MASK));
+		data = (data & FPCR_DYN_MASK) | ieee_swcr_to_fpcr(data);
+	}
 	*get_reg_addr(task, regno) = data;
 	return 0;
 }