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27 lines
1.1 KiB
Diff
27 lines
1.1 KiB
Diff
Description: unset CALL_MCOUNT for __libc_do_syscall
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unset CALL_MCOUNT before __libc_do_syscall, because it only supports Thumb-2
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and ARM mode, not Thumb-1; and because profiling this internal routine
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is of dubious value.
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Origin: https://bugs.launchpad.net/linaro-toolchain-misc/+bug/605030/+attachment/1484534/+files/libc-do-syscall.S
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Author: Peter Pearse <peter.pearse@linaro.org>
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Bug-Linaro: https://bugs.launchpad.net/linaro-toolchain-misc/+bug/605030
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Bug-Ubuntu: https://bugs.launchpad.net/ubuntu/+source/eglibc/+bug/605030
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Reviewed-by: Steve Langasek <steve.langasek@linaro.org>
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Index: glibc-2.12.1/ports/sysdeps/unix/sysv/linux/arm/eabi/libc-do-syscall.S
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===================================================================
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--- glibc-2.12.1.orig/ports/sysdeps/unix/sysv/linux/arm/eabi/libc-do-syscall.S
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+++ glibc-2.12.1/ports/sysdeps/unix/sysv/linux/arm/eabi/libc-do-syscall.S
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@@ -29,6 +29,12 @@
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.syntax unified
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.hidden __libc_do_syscall
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+/*
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+ * PMP Work round for https://bugs.launchpad.net/gcc-linaro/+bug/605030
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+ */
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+#undef CALL_MCOUNT
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+#define CALL_MCOUNT
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+
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ENTRY (__libc_do_syscall)
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.fnstart
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push {r7, lr}
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