36 lines
1.4 KiB
Diff
36 lines
1.4 KiB
Diff
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commit 022f5af61bc3cbfa2b74ab355b0d2d30b3dab027
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Author: Khem Raj <raj.khem@gmail.com>
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Date: Sat Dec 22 15:28:40 2018 -0800
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tests/amd64: Do not clobber %rsp register
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This is seen with gcc-9.0 compiler now which is fix that gcc community
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did recently
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52813
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Signed-off-by: Khem Raj <raj.khem@gmail.com>
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diff --git a/none/tests/amd64-linux/bug345887.c b/none/tests/amd64-linux/bug345887.c
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index 0f9237d..269bd70 100644
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--- a/none/tests/amd64-linux/bug345887.c
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+++ b/none/tests/amd64-linux/bug345887.c
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@@ -20,13 +20,17 @@ static void inner(void)
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"movq $0x10d, %%r14\n"
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"movq $0x10e, %%r15\n"
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// not %rbp as mdb is then not able to reconstruct stack trace
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+ // Do change %rsp (to test a bogus stack pointer),
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+ // but don't add %rsp to the clobber list since gcc ignores it
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+ // and since gcc >= 9.0 errors about it
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+ // see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52813
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"movq $0x10f, %%rsp\n"
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"movq $0x1234, (%%rax)\n" // should cause SEGV here
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"ud2" // should never get here
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: // no output registers
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: // no input registers
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: "memory", "%rax", "%rbx", "%rcx", "%rdx", "%rsi", "%rdi",
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- "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14", "%r15", "%rsp");
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+ "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14", "%r15");
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}
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__attribute__((noinline))
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