libitm: Configure for gas cfi pseudo ops.
* asmcfi.m4: New file. * configure.ac (GCC_AS_CFI_PSEUDO_OP): Test it. * configure, aclocal.m4, config.h.in: Rebuild. * config/generic/asmcfi.h: New file. * config/x86/sjlj.S: Use it. From-SVN: r181224
This commit is contained in:
Richard Henderson
Richard Henderson
parent
29d281ca3a
commit
4bdd090f8e
@ -1,3 +1,7 @@
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2011-11-09 Richard Henderson <rth@redhat.com>
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* asmcfi.m4: New file.
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2011-11-02 Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>
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* mh-interix (LIBGCC2_DEBUG_CFLAGS): Remove.
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15
config/asmcfi.m4
Normal file
15
config/asmcfi.m4
Normal file
@ -0,0 +1,15 @@
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;; Cribbed from libffi
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AC_DEFUN([GCC_AS_CFI_PSEUDO_OP],
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[AC_CACHE_CHECK([assembler .cfi pseudo-op support],
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gcc_cv_as_cfi_pseudo_op, [
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gcc_cv_as_cfi_pseudo_op=unknown
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AC_TRY_COMPILE([asm (".cfi_startproc\n\t.cfi_endproc");],,
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[gcc_cv_as_cfi_pseudo_op=yes],
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[gcc_cv_as_cfi_pseudo_op=no])
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])
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if test "x$gcc_cv_as_cfi_pseudo_op" = xyes; then
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AC_DEFINE(HAVE_AS_CFI_PSEUDO_OP, 1,
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[Define if your assembler supports .cfi_* directives.])
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fi
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])
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@ -1,3 +1,10 @@
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2011-11-09 Richard Henderson <rth@redhat.com>
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* configure.ac (GCC_AS_CFI_PSEUDO_OP): Test it.
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* configure, aclocal.m4, config.h.in: Rebuild.
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* config/generic/asmcfi.h: New file.
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* config/x86/sjlj.S: Use it.
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2011-11-08 Richard Henderson <rth@redhat.com>
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* local.cc (_ITM_LB): Use a normal call, not a function alias.
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1
libitm/aclocal.m4
vendored
1
libitm/aclocal.m4
vendored
@ -991,6 +991,7 @@ AC_SUBST([am__untar])
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]) # _AM_PROG_TAR
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m4_include([../config/acx.m4])
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m4_include([../config/asmcfi.m4])
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m4_include([../config/depstand.m4])
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m4_include([../config/enable.m4])
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m4_include([../config/futex.m4])
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@ -6,6 +6,9 @@
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/* Define to 1 if the target supports 64-bit __sync_*_compare_and_swap */
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#undef HAVE_64BIT_SYNC_BUILTINS
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/* Define if your assembler supports .cfi_* directives. */
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#undef HAVE_AS_CFI_PSEUDO_OP
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/* Define to 1 if the target supports __attribute__((alias(...))). */
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#undef HAVE_ATTRIBUTE_ALIAS
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44
libitm/config/generic/asmcfi.h
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44
libitm/config/generic/asmcfi.h
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@ -0,0 +1,44 @@
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/* Copyright (C) 2011 Free Software Foundation, Inc.
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Contributed by Richard Henderson <rth@redhat.com>.
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This file is part of the GNU Transactional Memory Library (libitm).
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Libitm is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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Libitm is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#include "config.h"
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#ifdef HAVE_AS_CFI_PSEUDO_OP
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#define cfi_startproc .cfi_startproc
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#define cfi_endproc .cfi_endproc
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#define cfi_def_cfa_offset(n) .cfi_def_cfa_offset n
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#define cfi_def_cfa(r,n) .cfi_def_cfa r, n
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#define cfi_register(o,n) .cfi_register o, n
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#else
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#define cfi_startproc
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#define cfi_endproc
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#define cfi_def_cfa_offset(n)
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#define cfi_def_cfa(r,n)
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#define cfi_register(o,n)
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#endif /* HAVE_ASM_CFI */
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@ -22,18 +22,21 @@
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#include "asmcfi.h"
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.text
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.p2align 4
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.globl _ITM_beginTransaction
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.type _ITM_beginTransaction, @function
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_ITM_beginTransaction:
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.cfi_startproc
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cfi_startproc
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#ifdef __x86_64__
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leaq 8(%rsp), %rax
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movq (%rsp), %r8
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subq $72, %rsp
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.cfi_def_cfa_offset 80
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cfi_def_cfa_offset(80)
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movq %rax, (%rsp)
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movq %r8, 8(%rsp)
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movq %rbx, 16(%rsp)
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@ -45,12 +48,12 @@ _ITM_beginTransaction:
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movq %rsp, %rsi
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call GTM_begin_transaction
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addq $72, %rsp
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.cfi_def_cfa_offset 8
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cfi_def_cfa_offset(8)
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ret
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#else
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leal 4(%esp), %ecx
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subl $28, %esp
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.cfi_def_cfa_offset 32
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cfi_def_cfa_offset(32)
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movl %ecx, 8(%esp)
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movl %ebx, 12(%esp)
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movl %esi, 16(%esp)
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@ -59,10 +62,10 @@ _ITM_beginTransaction:
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leal 8(%esp), %edx
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call GTM_begin_transaction
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addl $28, %esp
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.cfi_def_cfa_offset 4
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cfi_def_cfa_offset(4)
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ret
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#endif
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.cfi_endproc
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cfi_endproc
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.size _ITM_beginTransaction, .-_ITM_beginTransaction
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.p2align 4
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@ -71,7 +74,7 @@ _ITM_beginTransaction:
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.hidden GTM_longjmp
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GTM_longjmp:
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.cfi_startproc
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cfi_startproc
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#ifdef __x86_64__
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movq (%rdi), %rcx
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movq 8(%rdi), %rdx
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@ -82,8 +85,8 @@ GTM_longjmp:
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movq 48(%rdi), %r14
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movq 56(%rdi), %r15
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movl %esi, %eax
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.cfi_def_cfa %rcx, 0
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.cfi_register %rip, %rdx
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cfi_def_cfa(%rcx, 0)
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cfi_register(%rip, %rdx)
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movq %rcx, %rsp
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jmp *%rdx
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#else
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@ -94,12 +97,12 @@ GTM_longjmp:
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movl 12(%edx), %edi
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movl 16(%edx), %ebp
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movl 20(%edx), %edx
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.cfi_def_cfa %ecx, 0
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.cfi_register %eip, %edx
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cfi_def_cfa(%ecx, 0)
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cfi_register(%eip, %edx)
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movl %ecx, %esp
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jmp *%edx
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#endif
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.cfi_endproc
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cfi_endproc
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.size GTM_longjmp, .-GTM_longjmp
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.section .note.GNU-stack, "", @progbits
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36
libitm/configure
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36
libitm/configure
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fi
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# See if we can emit unwind info in the sjlj stub.
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking assembler .cfi pseudo-op support" >&5
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$as_echo_n "checking assembler .cfi pseudo-op support... " >&6; }
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if test "${gcc_cv_as_cfi_pseudo_op+set}" = set; then :
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$as_echo_n "(cached) " >&6
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else
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gcc_cv_as_cfi_pseudo_op=unknown
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cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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/* end confdefs.h. */
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asm (".cfi_startproc\n\t.cfi_endproc");
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int
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main ()
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{
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;
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return 0;
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}
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_ACEOF
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if ac_fn_c_try_compile "$LINENO"; then :
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gcc_cv_as_cfi_pseudo_op=yes
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else
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gcc_cv_as_cfi_pseudo_op=no
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fi
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rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_as_cfi_pseudo_op" >&5
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$as_echo "$gcc_cv_as_cfi_pseudo_op" >&6; }
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if test "x$gcc_cv_as_cfi_pseudo_op" = xyes; then
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$as_echo "#define HAVE_AS_CFI_PSEUDO_OP 1" >>confdefs.h
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fi
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# Determine the proper ABI type for size_t.
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking how size_t is mangled" >&5
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@ -219,6 +219,9 @@ if test $enable_symvers = gnu; then
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[Define to 1 if GNU symbol versioning is used for libitm.])
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fi
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# See if we can emit unwind info in the sjlj stub.
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GCC_AS_CFI_PSEUDO_OP
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# Determine the proper ABI type for size_t.
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LIBITM_CHECK_SIZE_T_MANGLING
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