patch-2.4.10 linux/arch/mips/kernel/gdb-low.S

• Lines: 91
• Date: Sun Sep 9 10:43:01 2001
• Orig file: v2.4.9/linux/arch/mips/kernel/gdb-low.S
• Orig date: Sat May 13 08:29:14 2000

diff -u --recursive --new-file v2.4.9/linux/arch/mips/kernel/gdb-low.S linux/arch/mips/kernel/gdb-low.S
@@ -1,16 +1,13 @@
 /*
- * arch/mips/kernel/gdb-low.S
- *
  * gdb-low.S contains the low-level trap handler for the GDB stub.
  *
  * Copyright (C) 1995 Andreas Busse
- *
- * $Id: gdb-low.S,v 1.4 1997/12/01 17:57:26 ralf Exp $
  */
-
+#include <linux/config.h>
 #include <linux/sys.h>
 
 #include <asm/asm.h>
+#include <asm/errno.h>
 #include <asm/mipsregs.h>
 #include <asm/regdef.h>
 #include <asm/stackframe.h>
@@ -30,10 +27,15 @@
 		move	k1,sp
 
 		/*
-		 * Called from user mode, new stack
+		 * Called from user mode, go somewhere else.
 		 */
-		lui	k1,%hi(kernelsp)
-		lw	k1,%lo(kernelsp)(k1)
+		lui	k1,%hi(saved_vectors)
+		mfc0	k0,CP0_CAUSE
+		andi	k0,k0,0x7c
+		add	k1,k1,k0
+		lw	k0,%lo(saved_vectors)(k1)
+		jr	k0
+		nop
 1:
 		move	k0,sp
 		subu	sp,k1,GDB_FR_SIZE
@@ -302,11 +304,51 @@
 		lw	v1,GDB_FR_REG3(sp)
 		lw	v0,GDB_FR_REG2(sp)
 		lw	$1,GDB_FR_REG1(sp)
-		lw	sp,GDB_FR_REG29(sp)		/* Deallocate stack */
+#ifdef CONFIG_CPU_R3000
+		lw	k0, GDB_FR_EPC(sp)
+		lw	sp, GDB_FR_REG29(sp)		/* Deallocate stack */
+		jr	k0
+		rfe
+#else
+		lw	sp, GDB_FR_REG29(sp)		/* Deallocate stack */
 
 		.set	mips3
 		eret
 		.set	mips0
+#endif
 		.set	at
 		.set	reorder
 		END(trap_low)
+
+LEAF(kgdb_read_byte)
+		.set push
+		.set noreorder
+		.set nomacro
+4:		lb	t0, (a0)
+		.set pop
+		sb	t0, (a1)
+		li	v0, 0
+		jr	ra
+		.section __ex_table,"a"
+		PTR	4b, kgdbfault
+		.previous
+		END(kgdb_read_byte)
+
+LEAF(kgdb_write_byte)
+		.set push
+		.set noreorder
+		.set nomacro
+5:		sb	a0, (a1)
+		.set pop
+		li	v0, 0
+		jr	ra
+		.section __ex_table,"a"
+		PTR	5b, kgdbfault
+		.previous
+		END(kgdb_write_byte)
+
+		.type	kgdbfault@function
+		.ent	kgdbfault
+kgdbfault:	li	v0, -EFAULT
+		jr	ra
+		.end	kgdbfault