120 lines
3.4 KiB
Text
120 lines
3.4 KiB
Text
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dnl Copyright (C) 2012-2022 Free Software Foundation, Inc.
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dnl
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dnl This file is part of GDB.
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dnl
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dnl This program is free software; you can redistribute it and/or modify
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dnl it under the terms of the GNU General Public License as published by
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dnl the Free Software Foundation; either version 3 of the License, or
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dnl (at your option) any later version.
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dnl
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dnl This program is distributed in the hope that it will be useful,
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dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
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dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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dnl GNU General Public License for more details.
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dnl
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dnl You should have received a copy of the GNU General Public License
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dnl along with this program. If not, see <http://www.gnu.org/licenses/>.
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dnl Check the return and argument types of ptrace.
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AC_DEFUN([GDB_AC_PTRACE],
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[
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AC_CHECK_HEADERS([sys/ptrace.h ptrace.h])
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gdb_ptrace_headers='
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#include <sys/types.h>
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#if HAVE_SYS_PTRACE_H
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# include <sys/ptrace.h>
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#endif
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#if HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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'
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# Check return type. Varargs (used on GNU/Linux) conflict with the
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# empty argument list, so check for that explicitly.
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AC_CACHE_CHECK(
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[return type of ptrace],
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[gdb_cv_func_ptrace_ret],
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[AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM(
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[$gdb_ptrace_headers],
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[extern long ptrace (enum __ptrace_request, ...);]
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)],
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[gdb_cv_func_ptrace_ret='long'],
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[AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM(
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[$gdb_ptrace_headers],
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[extern int ptrace ();]
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)],
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[gdb_cv_func_ptrace_ret='int'],
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[gdb_cv_func_ptrace_ret='long']
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)]
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)]
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)
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AC_DEFINE_UNQUOTED(
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[PTRACE_TYPE_RET],
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[$gdb_cv_func_ptrace_ret],
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[Define as the return type of ptrace.]
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)
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# Check argument types.
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AC_CACHE_CHECK(
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[types of arguments for ptrace],
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[gdb_cv_func_ptrace_args],
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[AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM(
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[$gdb_ptrace_headers],
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[extern long ptrace (enum __ptrace_request, ...);]
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)],
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[gdb_cv_func_ptrace_args='enum __ptrace_request,int,long,long'],
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[for gdb_arg1 in 'int' 'long'; do
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for gdb_arg2 in 'pid_t' 'int' 'long'; do
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for gdb_arg3 in 'int *' 'caddr_t' 'int' 'long' 'void *'; do
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for gdb_arg4 in 'int' 'long' 'void *'; do
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AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM(
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[$gdb_ptrace_headers],
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[extern $gdb_cv_func_ptrace_ret ptrace ($gdb_arg1, $gdb_arg2, $gdb_arg3, $gdb_arg4);]
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)],
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[gdb_cv_func_ptrace_args="$gdb_arg1,$gdb_arg2,$gdb_arg3,$gdb_arg4";
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break 4;]
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)
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for gdb_arg5 in 'int *' 'int' 'long'; do
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AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM(
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[$gdb_ptrace_headers],
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[extern $gdb_cv_func_ptrace_ret ptrace ($gdb_arg1, $gdb_arg2, $gdb_arg3, $gdb_arg4, $gdb_arg5);]
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)],
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[gdb_cv_func_ptrace_args="$gdb_arg1,$gdb_arg2,$gdb_arg3,$gdb_arg4,$gdb_arg5";
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break 5;]
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)
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done
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done
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done
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done
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done
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# Provide a safe default value.
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: ${gdb_cv_func_ptrace_args='int,int,long,long'}]
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)]
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)
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ac_save_IFS=$IFS; IFS=','
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set dummy `echo "$gdb_cv_func_ptrace_args" | sed 's/\*/\*/g'`
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IFS=$ac_save_IFS
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shift
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AC_DEFINE_UNQUOTED(PTRACE_TYPE_ARG1, $[1],
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[Define to the type of arg 1 for ptrace.])
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AC_DEFINE_UNQUOTED(PTRACE_TYPE_ARG3, $[3],
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[Define to the type of arg 3 for ptrace.])
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AC_DEFINE_UNQUOTED(PTRACE_TYPE_ARG4, $[4],
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[Define to the type of arg 4 for ptrace.])
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if test -n "$[5]"; then
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AC_DEFINE_UNQUOTED(PTRACE_TYPE_ARG5, $[5],
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[Define to the type of arg 5 for ptrace.])
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fi
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])
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