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-rw-r--r--lang/gcc48/files/values.c64
1 files changed, 64 insertions, 0 deletions
diff --git a/lang/gcc48/files/values.c b/lang/gcc48/files/values.c
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+#if 0 /* $NetBSD: values.c,v 1.1 2013/04/01 21:06:16 wiz Exp $ */
+#
+# This is Solaris x86 specific GCC run-time environment patch, which
+# makes it possible to reliably deploy .init snippets. Trouble is that
+# Solaris linker erroneously pads .init segment with zeros [instead of
+# nops], which is bound to SEGV early upon program start-up. This bug
+# was recognized by GCC team [it is mentioned in source code], but
+# workaround apparently and obviously erroneously slipped away in some
+# newer GCC release. This patch compensates for this mishap by dropping
+# modified values-X*.o into GCC installation tree. Object modules in
+# question are normally provided by Sun and linked prior crtbegin.o.
+# Modified versions are additionally crafted with custom .init segment,
+# which does some magic:-)
+# <appro@fy.chalmers.se>
+set -e
+gcc=gcc
+if [[ "x$1" = x*gcc ]]; then
+ gcc=$1; shift
+fi
+gcc_dir=`${gcc} "$@" -print-libgcc-file-name`
+gcc_dir=${gcc_dir%/*} #*/
+set -x
+${gcc} "$@" -c -o $gcc_dir/values-Xa.o -DXa $0
+${gcc} "$@" -c -o $gcc_dir/values-Xc.o -DXc $0
+${gcc} "$@" -c -o $gcc_dir/values-Xt.o -DXt $0
+exit
+#endif
+
+#include <math.h>
+
+#if defined(Xa)
+const enum version _lib_version = ansi_1;
+#elif defined(Xc)
+const enum version _lib_version = strict_ansi;
+#elif defined(Xt)
+const enum version _lib_version = c_issue_4;
+#else
+#error "compile by issuing 'ksh -f values.c [gcc] [-m64]'"
+#endif
+
+#if defined(__x86_64__)
+asm("\n"
+".section .init\n"
+".align 1\n"
+" leaq 1f(%rip),%rax\n"
+"1: cmpl $0,2f-1b(%rax)\n"
+" jne 2f\n"
+" jmp 2f+5\n"
+" .skip 9\n" /* pad up to 0x1b bytes */
+"2:\n"
+);
+#else
+asm("\n"
+".section .init\n"
+".align 1\n"
+" call 1f\n"
+"1: popl %eax\n"
+" cmpl $0,2f-1b(%eax)\n"
+" jne 2f\n"
+" jmp 2f+5\n"
+" .skip 10\n" /* pad up to 0x1b bytes */
+"2:\n"
+);
+#endif