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From 8c1ebb564f5eca2baeedc27a703200786d1abb0b Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Sat, 22 Dec 2018 15:28:40 -0800
Subject: [PATCH] tests/amd64: Do not clobber %rsp register
This is seen with gcc-9.0 compiler now which is fix that gcc community
did recently
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52813
Upstream-Status: Submitted [https://bugs.kde.org/show_bug.cgi?id=402480]
Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
none/tests/amd64-linux/bug345887.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/none/tests/amd64-linux/bug345887.c b/none/tests/amd64-linux/bug345887.c
index 0f9237d..4b07fe1 100644
--- a/none/tests/amd64-linux/bug345887.c
+++ b/none/tests/amd64-linux/bug345887.c
@@ -20,13 +20,14 @@ static void inner(void)
"movq $0x10d, %%r14\n"
"movq $0x10e, %%r15\n"
// not %rbp as mdb is then not able to reconstruct stack trace
- "movq $0x10f, %%rsp\n"
+ // not %rsp since gcc ignores it and since gcc >= 9.0 errors about it
+ // see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52813
"movq $0x1234, (%%rax)\n" // should cause SEGV here
"ud2" // should never get here
: // no output registers
: // no input registers
: "memory", "%rax", "%rbx", "%rcx", "%rdx", "%rsi", "%rdi",
- "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14", "%r15", "%rsp");
+ "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14", "%r15");
}
__attribute__((noinline))
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