forked from pool/gcc15
Richard Biener
e0a5150463
- Take patches inherited from GCC 14.
* gcc-add-defaultsspec.diff, add the ability to provide a specs
file that is read by default
* tls-no-direct.diff, avoid direct %fs references on x86 to not
slow down Xen
* gcc43-no-unwind-tables.diff, do not produce unwind tables for
CRT files
* gcc41-ppc32-retaddr.patch, fix expansion of __builtin_return_addr
for ppc, just a testcase
* gcc44-textdomain.patch, make translation files version specific
and adjust textdomain to find them
* gcc44-rename-info-files.patch, fix cross-references in info files
when renaming them to be version specific
* gcc48-libstdc++-api-reference.patch, fix link in the installed
libstdc++ html documentation
* gcc7-remove-Wexpansion-to-defined-from-Wextra.patch, removes
new warning from -Wextra
* gcc7-avoid-fixinc-error.diff
* gcc9-reproducible-builds-buildid-for-checksum.patch
* gcc9-reproducible-builds.patch
* gcc11-gdwarf-4-default.patch, default to -gdwarf-4 on old products
OBS-URL: https://build.opensuse.org/package/show/devel:gcc/gcc15?expand=0&rev=1
21 lines
913 B
Diff
21 lines
913 B
Diff
For i?86 negative offsets to %fs segment accesses cause a hypervisor
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trap for Xen. Avoid this by making accesses indirect.
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??? Note that similar to the behavior on SLE11 this only affects
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the compiler built on %ix86, not that on x86_64, even with -m32.
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Index: gcc/config/i386/linux.h
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===================================================================
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--- gcc/config/i386/linux.h.orig 2015-12-17 15:07:37.785650062 +0100
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+++ gcc/config/i386/linux.h 2015-12-17 15:08:06.393983290 +0100
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@@ -24,3 +24,9 @@ along with GCC; see the file COPYING3.
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#undef MUSL_DYNAMIC_LINKER
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#define MUSL_DYNAMIC_LINKER "/lib/ld-musl-i386.so.1"
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+
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+/* This slows down Xen, so take a very small general performance hit
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+ for not accessing the %fs segment with negative offsets by making
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+ GCC not emit direct accesses to %fs at all. */
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+#undef TARGET_TLS_DIRECT_SEG_REFS_DEFAULT
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+#define TARGET_TLS_DIRECT_SEG_REFS_DEFAULT 0
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