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78 lines
2.8 KiB
78 lines
2.8 KiB
On top of this patch we include a few more redirecting versions of |
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the rtld-* routines in multiarch, this is needed because of the |
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sysd-rules which try to build from multiarch first and will even |
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use memset.S from multiarch to buidl rtld-memset.os, which results |
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in SSE register usage in rtld which we can't allow because of |
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lazy binding (though in some cases we use RTLD_PREPARE_FOREIGN_CALL |
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and others to wrap such calls). |
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commit 747ef469ffc9c9179ca9d76854167925b4e44346 |
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Author: Siddhesh Poyarekar <siddhesh@redhat.com> |
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Date: Sat Jun 15 00:09:26 2013 +0530 |
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Add rtld-memset.S for x86_64 |
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Resolves: BZ #15627 |
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Add an assembler version of rtld-memset to avoid using SSE registers. |
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Index: glibc-2.17-c758a686/sysdeps/x86_64/rtld-memset.S |
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=================================================================== |
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--- /dev/null |
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+++ glibc-2.17-c758a686/sysdeps/x86_64/rtld-memset.S |
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@@ -0,0 +1,37 @@ |
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+/* memset implementation for the dynamic linker. This is separate from the |
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+ libc implementation to avoid writing to SSE registers. |
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+ Copyright (C) 2013 Free Software Foundation, Inc. |
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+ This file is part of the GNU C Library. |
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+ |
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+ The GNU C Library is free software; you can redistribute it and/or |
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+ modify it under the terms of the GNU Lesser General Public |
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+ License as published by the Free Software Foundation; either |
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+ version 2.1 of the License, or (at your option) any later version. |
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+ |
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+ The GNU C Library is distributed in the hope that it will be useful, |
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of |
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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+ Lesser General Public License for more details. |
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+ |
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+ You should have received a copy of the GNU Lesser General Public |
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+ License along with the GNU C Library; if not, see |
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+ <http://www.gnu.org/licenses/>. */ |
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+ |
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+#include <sysdep.h> |
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+#include "asm-syntax.h" |
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+ |
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+ |
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+ .text |
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+/* void *memset (void *dest, char c, size_t count) |
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+ dest => %rdi |
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+ c => %rsi |
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+ count => %rdx */ |
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+ENTRY (memset) |
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+ mov %rdx, %rcx |
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+ movzbl %sil, %eax |
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+ mov %rdi, %rdx |
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+ rep stosb |
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+ mov %rdx, %rax |
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+ ret |
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+END (memset) |
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+libc_hidden_builtin_def (memset) |
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Index: glibc-2.17-c758a686/sysdeps/x86_64/rtld-memset.c |
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=================================================================== |
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--- glibc-2.17-c758a686.orig/sysdeps/x86_64/rtld-memset.c |
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+++ /dev/null |
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@@ -1 +0,0 @@ |
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-#include <string/memset.c> |
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Index: glibc-2.17-c758a686/sysdeps/x86_64/multiarch/rtld-memset.S |
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=================================================================== |
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--- /dev/null |
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+++ glibc-2.17-c758a686/sysdeps/x86_64/multiarch/rtld-memset.S |
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@@ -0,0 +1 @@ |
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+#include "../rtld-memset.S" |
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Index: glibc-2.17-c758a686/sysdeps/x86_64/multiarch/rtld-strchr.S |
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=================================================================== |
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--- /dev/null |
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+++ glibc-2.17-c758a686/sysdeps/x86_64/multiarch/rtld-strchr.S |
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@@ -0,0 +1 @@ |
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+#include "../rtld-strchr.S"
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