From d0128a84c50db94e8efb99d95578f78e56a2f281 Mon Sep 17 00:00:00 2001
From: rrs <rrs@FreeBSD.org>
Date: Wed, 3 Feb 2010 12:59:44 +0000
Subject: This fixes a bug found and fixed by JC. Basically no save was being
 done of the ra and gp pointers before we call the __error function.

Obtained from:	JC (c.jayachandran@gmail.com)
---
 lib/libc/mips/sys/ptrace.S | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

(limited to 'lib/libc')

diff --git a/lib/libc/mips/sys/ptrace.S b/lib/libc/mips/sys/ptrace.S
index 86bc1e5..53ca78d 100644
--- a/lib/libc/mips/sys/ptrace.S
+++ b/lib/libc/mips/sys/ptrace.S
@@ -42,14 +42,26 @@ __FBSDID("$FreeBSD$");
 #endif /* LIBC_SCCS and not lint */
 
 LEAF(ptrace)
+	.frame	sp,40,ra
+	.mask	0x80000000, -8
 #ifdef __ABICALLS__
 	.set    noreorder
 	.cpload t9
 	.set    reorder
 #endif
+	subu	sp, sp, 40
+	sw	ra,  32(sp)
+#ifdef __ABICALLS__
+	.cprestore 16
+#endif
 	la	t9, _C_LABEL(__error)	# locate address of errno
-	jalr	t9
+	jalr	t9	
+#ifdef __ABICALLS__
+	lw	gp, 16(sp)
+#endif
 	sw	zero, 0(v0)
+	lw	ra, 32(sp)
+	addu	sp, sp, 40
 	li	v0, SYS_ptrace
 	syscall
 	bne	a3, zero, 1f
-- 
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