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33 lines
960 B
33 lines
960 B
3 years ago
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commit 7af07fe795f43e53d31be1c6f9adba7e05f87b0b
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Author: Xi Ruoyao <xry111@mengyan1223.wang>
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Date: Thu Aug 12 20:31:59 2021 +0000
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mips: align stack in clone [BZ #28223]
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The MIPS O32 ABI requires 4 byte aligned stack, and the MIPS N64 and N32
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ABI require 8 byte aligned stack. Previously if the caller passed an
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unaligned stack to clone the the child misbehaved.
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Fixes bug 28223.
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(cherry picked from commit 1f51cd9a860ee45eee8a56fb2ba925267a2a7bfe)
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diff --git a/sysdeps/unix/sysv/linux/mips/clone.S b/sysdeps/unix/sysv/linux/mips/clone.S
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index 71d9dba8bd9e8f9e..43a5ad3a400d9504 100644
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--- a/sysdeps/unix/sysv/linux/mips/clone.S
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+++ b/sysdeps/unix/sysv/linux/mips/clone.S
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@@ -55,6 +55,13 @@ NESTED(__clone,4*SZREG,sp)
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.set at
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#endif
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+ /* Align stack to 4/8 bytes per the ABI. */
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+#if _MIPS_SIM == _ABIO32
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+ li t0,-4
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+#else
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+ li t0,-8
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+#endif
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+ and a1,a1,t0
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/* Sanity check arguments. */
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li v0,EINVAL
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