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eb7aa561 PA |
1 | dnl Copyright (C) 2012-2015 Free Software Foundation, Inc. |
2 | dnl | |
3 | dnl This file is part of GDB. | |
4 | dnl | |
5 | dnl This program is free software; you can redistribute it and/or modify | |
6 | dnl it under the terms of the GNU General Public License as published by | |
7 | dnl the Free Software Foundation; either version 3 of the License, or | |
8 | dnl (at your option) any later version. | |
9 | dnl | |
10 | dnl This program is distributed in the hope that it will be useful, | |
11 | dnl but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | dnl GNU General Public License for more details. | |
14 | dnl | |
15 | dnl You should have received a copy of the GNU General Public License | |
16 | dnl along with this program. If not, see <http://www.gnu.org/licenses/>. | |
17 | ||
18 | dnl Check the return and argument types of ptrace. | |
19 | ||
20 | AC_DEFUN([GDB_AC_PTRACE], | |
21 | [ | |
22 | ||
23 | AC_CHECK_HEADERS([sys/ptrace.h ptrace.h]) | |
24 | ||
54019719 PA |
25 | # Needs to be tested in C++ mode, to detect whether we need to cast |
26 | # the first argument to enum __ptrace_request. | |
27 | if test "$enable_build_with_cxx" = "yes"; then | |
28 | AC_LANG_PUSH([C++]) | |
29 | fi | |
30 | ||
eb7aa561 PA |
31 | gdb_ptrace_headers=' |
32 | #include <sys/types.h> | |
33 | #if HAVE_SYS_PTRACE_H | |
34 | # include <sys/ptrace.h> | |
35 | #endif | |
36 | #if HAVE_UNISTD_H | |
37 | # include <unistd.h> | |
38 | #endif | |
39 | ' | |
40 | # There is no point in checking if we don't have a prototype. | |
41 | AC_CHECK_DECLS(ptrace, [], [ | |
42 | : ${gdb_cv_func_ptrace_ret='int'} | |
43 | : ${gdb_cv_func_ptrace_args='int,int,long,long'} | |
44 | ], $gdb_ptrace_headers) | |
45 | # Check return type. Varargs (used on GNU/Linux) conflict with the | |
46 | # empty argument list, so check for that explicitly. | |
47 | AC_CACHE_CHECK([return type of ptrace], gdb_cv_func_ptrace_ret, | |
48 | AC_TRY_COMPILE($gdb_ptrace_headers, | |
49 | [extern long ptrace (enum __ptrace_request, ...);], | |
50 | gdb_cv_func_ptrace_ret='long', | |
51 | AC_TRY_COMPILE($gdb_ptrace_headers, | |
52 | [extern int ptrace ();], | |
53 | gdb_cv_func_ptrace_ret='int', | |
54 | gdb_cv_func_ptrace_ret='long'))) | |
55 | AC_DEFINE_UNQUOTED(PTRACE_TYPE_RET, $gdb_cv_func_ptrace_ret, | |
56 | [Define as the return type of ptrace.]) | |
57 | # Check argument types. | |
58 | AC_CACHE_CHECK([types of arguments for ptrace], gdb_cv_func_ptrace_args, [ | |
59 | AC_TRY_COMPILE($gdb_ptrace_headers, | |
60 | [extern long ptrace (enum __ptrace_request, ...);], | |
54019719 | 61 | [gdb_cv_func_ptrace_args='enum __ptrace_request,int,long,long'],[ |
eb7aa561 PA |
62 | for gdb_arg1 in 'int' 'long'; do |
63 | for gdb_arg2 in 'pid_t' 'int' 'long'; do | |
64 | for gdb_arg3 in 'int *' 'caddr_t' 'int' 'long' 'void *'; do | |
65 | for gdb_arg4 in 'int' 'long' 'void *'; do | |
66 | AC_TRY_COMPILE($gdb_ptrace_headers, [ | |
67 | extern $gdb_cv_func_ptrace_ret | |
68 | ptrace ($gdb_arg1, $gdb_arg2, $gdb_arg3, $gdb_arg4); | |
69 | ], [gdb_cv_func_ptrace_args="$gdb_arg1,$gdb_arg2,$gdb_arg3,$gdb_arg4"; | |
70 | break 4;]) | |
71 | for gdb_arg5 in 'int *' 'int' 'long'; do | |
72 | AC_TRY_COMPILE($gdb_ptrace_headers, [ | |
73 | extern $gdb_cv_func_ptrace_ret | |
74 | ptrace ($gdb_arg1, $gdb_arg2, $gdb_arg3, $gdb_arg4, $gdb_arg5); | |
75 | ], [ | |
76 | gdb_cv_func_ptrace_args="$gdb_arg1,$gdb_arg2,$gdb_arg3,$gdb_arg4,$gdb_arg5"; | |
77 | break 5;]) | |
78 | done | |
79 | done | |
80 | done | |
81 | done | |
82 | done | |
83 | # Provide a safe default value. | |
84 | : ${gdb_cv_func_ptrace_args='int,int,long,long'} | |
85 | ])]) | |
86 | ac_save_IFS=$IFS; IFS=',' | |
87 | set dummy `echo "$gdb_cv_func_ptrace_args" | sed 's/\*/\*/g'` | |
88 | IFS=$ac_save_IFS | |
89 | shift | |
54019719 PA |
90 | AC_DEFINE_UNQUOTED(PTRACE_TYPE_ARG1, $[1], |
91 | [Define to the type of arg 1 for ptrace.]) | |
eb7aa561 PA |
92 | AC_DEFINE_UNQUOTED(PTRACE_TYPE_ARG3, $[3], |
93 | [Define to the type of arg 3 for ptrace.]) | |
94 | AC_DEFINE_UNQUOTED(PTRACE_TYPE_ARG4, $[4], | |
95 | [Define to the type of arg 4 for ptrace.]) | |
96 | if test -n "$[5]"; then | |
97 | AC_DEFINE_UNQUOTED(PTRACE_TYPE_ARG5, $[5], | |
98 | [Define to the type of arg 5 for ptrace.]) | |
99 | fi | |
54019719 PA |
100 | |
101 | if test "$enable_build_with_cxx" = "yes"; then | |
102 | AC_LANG_POP([C++]) | |
103 | fi | |
eb7aa561 | 104 | ]) |