| Message ID | CAOyqgcX4bC-ekVieZQ4t+DN7DUU6Kp4nGf3i8sbcv=1C2fjcdQ@mail.gmail.com |
|---|---|
| State | New |
| Headers | show |
| Series | libgcc patch committed: Increase x86_64 split-stack backoff size | expand |
diff --git a/libgcc/config/i386/morestack.S b/libgcc/config/i386/morestack.S index 519bbbc8c13..1c31783c754 100644 --- a/libgcc/config/i386/morestack.S +++ b/libgcc/config/i386/morestack.S @@ -79,7 +79,7 @@ #ifndef __x86_64__ #define BACKOFF (1024) #else -#define BACKOFF (1536) +#define BACKOFF (3584) #endif
With the ever increasing number of vector registers, and the use of the xsavec instruction in the dynamic linker trampolines in newer glibc, we need to ensure a lot more space on the stack when using -fsplit-stack. This patch adds 2048 additional bytes to the required stack space with -fsplit-stack. Discovered by running the Go testsuite on x86_64-pc-linux-gnu with glibc 2.30. This patch fixes that problem. Ran all Go tests on x86_64-pc-linux-gnu. Committed to mainline. Ian commit b3dc3bc7a785c33106aac50cbe39601e6d6b7e95 Author: Ian Lance Taylor <iant@golang.org> Date: Mon Aug 3 15:59:45 2020 -0700 libgcc: increase required stack space for x86_64 -fsplit-stack This accomodates increased space required by use of the xsavec instruction in the dynamic linker trampoline. libgcc/ChangeLog: * config/i386/morestack.S (BACKOFF) [x86_64]: Add 2048 bytes.