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yaml --- r: 113526 b: refs/heads/master c: 097a078 h: refs/heads/master v: v3
git-mirror · Oct 13, 2008 · 508a931 · 508a931
1 parent 90e0447
commit 508a931
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Showing 2 changed files with 8 additions and 1 deletion.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 2c44e66843cd50c5ef4f4271fbd63a4f4bf4d083
+refs/heads/master: 097a0788df71b0f3328c70ab5f4e41c27ee66817
diff --git a/trunk/arch/x86/kernel/entry_64.S b/trunk/arch/x86/kernel/entry_64.S
@@ -667,6 +667,13 @@ END(stub_rt_sigreturn)
 	SAVE_ARGS
 	leaq -ARGOFFSET(%rsp),%rdi	# arg1 for handler
 	pushq %rbp
+	/*
+	 * Save rbp twice: One is for marking the stack frame, as usual, and the
+	 * other, to fill pt_regs properly. This is because bx comes right
+	 * before the last saved register in that structure, and not bp. If the
+	 * base pointer were in the place bx is today, this would not be needed.
+	 */
+	movq %rbp, -8(%rsp)
 	CFI_ADJUST_CFA_OFFSET	8
 	CFI_REL_OFFSET		rbp, 0
 	movq %rsp,%rbp