diff options
Diffstat (limited to 'm4')
| -rw-r--r-- | m4/pc_from_ucontext.m4 | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/m4/pc_from_ucontext.m4 b/m4/pc_from_ucontext.m4 new file mode 100644 index 000000000..6bedcbb2d --- /dev/null +++ b/m4/pc_from_ucontext.m4 @@ -0,0 +1,131 @@ +# This file is from Google Performance Tools, svn revision r226. +# +# The Google Performance Tools license is: +######## +# Copyright (c) 2005, Google Inc. +# All rights reserved. +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions are +# met: +# +# * Redistributions of source code must retain the above copyright +# notice, this list of conditions and the following disclaimer. +# * Redistributions in binary form must reproduce the above +# copyright notice, this list of conditions and the following disclaimer +# in the documentation and/or other materials provided with the +# distribution. +# * Neither the name of Google Inc. nor the names of its +# contributors may be used to endorse or promote products derived from +# this software without specific prior written permission. +# +# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +######## +# Original file follows below. + +# We want to access the "PC" (Program Counter) register from a struct +# ucontext. Every system has its own way of doing that. We try all the +# possibilities we know about. Note REG_PC should come first (REG_RIP +# is also defined on solaris, but does the wrong thing). + +# OpenBSD doesn't have ucontext.h, but we can get PC from ucontext_t +# by using signal.h. + +# The first argument of AC_PC_FROM_UCONTEXT will be invoked when we +# cannot find a way to obtain PC from ucontext. + +AC_DEFUN([AC_PC_FROM_UCONTEXT], + [AC_CHECK_HEADERS(ucontext.h) + # Redhat 7 has <sys/ucontext.h>, but it barfs if we #include it directly + # (this was fixed in later redhats). <ucontext.h> works fine, so use that. + if grep "Red Hat Linux release 7" /etc/redhat-release >/dev/null 2>&1; then + AC_DEFINE(HAVE_SYS_UCONTEXT_H, 0, [<sys/ucontext.h> is broken on redhat 7]) + ac_cv_header_sys_ucontext_h=no + else + AC_CHECK_HEADERS(sys/ucontext.h) # ucontext on OS X 10.6 (at least) + fi + AC_CHECK_HEADERS(cygwin/signal.h) # ucontext on cywgin + AC_MSG_CHECKING([how to access the program counter from a struct ucontext]) + pc_fields=" uc_mcontext.gregs[[REG_PC]]" # Solaris x86 (32 + 64 bit) + pc_fields="$pc_fields uc_mcontext.gregs[[REG_EIP]]" # Linux (i386) + pc_fields="$pc_fields uc_mcontext.gregs[[REG_RIP]]" # Linux (x86_64) + pc_fields="$pc_fields uc_mcontext.sc_ip" # Linux (ia64) + pc_fields="$pc_fields uc_mcontext.uc_regs->gregs[[PT_NIP]]" # Linux (ppc) + pc_fields="$pc_fields uc_mcontext.gregs[[R15]]" # Linux (arm old [untested]) + pc_fields="$pc_fields uc_mcontext.arm_pc" # Linux (arm arch 5) + pc_fields="$pc_fields uc_mcontext.gp_regs[[PT_NIP]]" # Suse SLES 11 (ppc64) + pc_fields="$pc_fields uc_mcontext.mc_eip" # FreeBSD (i386) + pc_fields="$pc_fields uc_mcontext.mc_rip" # FreeBSD (x86_64 [untested]) + pc_fields="$pc_fields uc_mcontext.__gregs[[_REG_EIP]]" # NetBSD (i386) + pc_fields="$pc_fields uc_mcontext.__gregs[[_REG_RIP]]" # NetBSD (x86_64) + pc_fields="$pc_fields uc_mcontext->ss.eip" # OS X (i386, <=10.4) + pc_fields="$pc_fields uc_mcontext->__ss.__eip" # OS X (i386, >=10.5) + pc_fields="$pc_fields uc_mcontext->ss.rip" # OS X (x86_64) + pc_fields="$pc_fields uc_mcontext->__ss.__rip" # OS X (>=10.5 [untested]) + pc_fields="$pc_fields uc_mcontext->ss.srr0" # OS X (ppc, ppc64 [untested]) + pc_fields="$pc_fields uc_mcontext->__ss.__srr0" # OS X (>=10.5 [untested]) + pc_field_found=false + for pc_field in $pc_fields; do + if ! $pc_field_found; then + # Prefer sys/ucontext.h to ucontext.h, for OS X's sake. + if test "x$ac_cv_header_cygwin_signal_h" = xyes; then + AC_TRY_COMPILE([#define _GNU_SOURCE 1 + #include <cygwin/signal.h>], + [ucontext_t u; return u.$pc_field == 0;], + AC_DEFINE_UNQUOTED(PC_FROM_UCONTEXT, $pc_field, + How to access the PC from a struct ucontext) + AC_MSG_RESULT([$pc_field]) + pc_field_found=true) + elif test "x$ac_cv_header_sys_ucontext_h" = xyes; then + AC_TRY_COMPILE([#define _GNU_SOURCE 1 + #include <sys/ucontext.h>], + [ucontext_t u; return u.$pc_field == 0;], + AC_DEFINE_UNQUOTED(PC_FROM_UCONTEXT, $pc_field, + How to access the PC from a struct ucontext) + AC_MSG_RESULT([$pc_field]) + pc_field_found=true) + elif test "x$ac_cv_header_ucontext_h" = xyes; then + AC_TRY_COMPILE([#define _GNU_SOURCE 1 + #include <ucontext.h>], + [ucontext_t u; return u.$pc_field == 0;], + AC_DEFINE_UNQUOTED(PC_FROM_UCONTEXT, $pc_field, + How to access the PC from a struct ucontext) + AC_MSG_RESULT([$pc_field]) + pc_field_found=true) + else # hope some standard header gives it to us + AC_TRY_COMPILE([], + [ucontext_t u; return u.$pc_field == 0;], + AC_DEFINE_UNQUOTED(PC_FROM_UCONTEXT, $pc_field, + How to access the PC from a struct ucontext) + AC_MSG_RESULT([$pc_field]) + pc_field_found=true) + fi + fi + done + if ! $pc_field_found; then + pc_fields=" sc_eip" # OpenBSD (i386) + pc_fields="$pc_fields sc_rip" # OpenBSD (x86_64) + for pc_field in $pc_fields; do + if ! $pc_field_found; then + AC_TRY_COMPILE([#include <signal.h>], + [ucontext_t u; return u.$pc_field == 0;], + AC_DEFINE_UNQUOTED(PC_FROM_UCONTEXT, $pc_field, + How to access the PC from a struct ucontext) + AC_MSG_RESULT([$pc_field]) + pc_field_found=true) + fi + done + fi + if ! $pc_field_found; then + [$1] + fi]) |