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b811d2c2 | 1 | dnl Copyright (C) 2012-2020 Free Software Foundation, Inc. |
eb7aa561 PA |
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 | ||
25 | gdb_ptrace_headers=' | |
26 | #include <sys/types.h> | |
27 | #if HAVE_SYS_PTRACE_H | |
28 | # include <sys/ptrace.h> | |
29 | #endif | |
30 | #if HAVE_UNISTD_H | |
31 | # include <unistd.h> | |
32 | #endif | |
33 | ' | |
c884cc46 | 34 | |
eb7aa561 PA |
35 | # Check return type. Varargs (used on GNU/Linux) conflict with the |
36 | # empty argument list, so check for that explicitly. | |
b6fb30ed SM |
37 | AC_CACHE_CHECK( |
38 | [return type of ptrace], | |
39 | [gdb_cv_func_ptrace_ret], | |
40 | [AC_TRY_COMPILE( | |
41 | [$gdb_ptrace_headers], | |
42 | [extern long ptrace (enum __ptrace_request, ...);], | |
43 | [gdb_cv_func_ptrace_ret='long'], | |
44 | [AC_TRY_COMPILE( | |
45 | [$gdb_ptrace_headers], | |
46 | [extern int ptrace ();], | |
47 | [gdb_cv_func_ptrace_ret='int'], | |
48 | [gdb_cv_func_ptrace_ret='long'] | |
49 | )] | |
50 | )] | |
51 | ) | |
52 | ||
53 | AC_DEFINE_UNQUOTED( | |
54 | [PTRACE_TYPE_RET], | |
55 | [$gdb_cv_func_ptrace_ret], | |
56 | [Define as the return type of ptrace.] | |
57 | ) | |
58 | ||
eb7aa561 | 59 | # Check argument types. |
b6fb30ed SM |
60 | AC_CACHE_CHECK( |
61 | [types of arguments for ptrace], | |
62 | [gdb_cv_func_ptrace_args], | |
63 | [AC_TRY_COMPILE( | |
64 | [$gdb_ptrace_headers], | |
65 | [extern long ptrace (enum __ptrace_request, ...);], | |
66 | [gdb_cv_func_ptrace_args='enum __ptrace_request,int,long,long'], | |
67 | [for gdb_arg1 in 'int' 'long'; do | |
68 | for gdb_arg2 in 'pid_t' 'int' 'long'; do | |
69 | for gdb_arg3 in 'int *' 'caddr_t' 'int' 'long' 'void *'; do | |
70 | for gdb_arg4 in 'int' 'long' 'void *'; do | |
71 | AC_TRY_COMPILE( | |
72 | [$gdb_ptrace_headers], | |
73 | [extern $gdb_cv_func_ptrace_ret ptrace ($gdb_arg1, $gdb_arg2, $gdb_arg3, $gdb_arg4);], | |
74 | [gdb_cv_func_ptrace_args="$gdb_arg1,$gdb_arg2,$gdb_arg3,$gdb_arg4"; | |
75 | break 4;] | |
76 | ) | |
77 | ||
78 | for gdb_arg5 in 'int *' 'int' 'long'; do | |
79 | AC_TRY_COMPILE( | |
80 | [$gdb_ptrace_headers], | |
81 | [extern $gdb_cv_func_ptrace_ret ptrace ($gdb_arg1, $gdb_arg2, $gdb_arg3, $gdb_arg4, $gdb_arg5);], | |
82 | [gdb_cv_func_ptrace_args="$gdb_arg1,$gdb_arg2,$gdb_arg3,$gdb_arg4,$gdb_arg5"; | |
83 | break 5;] | |
84 | ) | |
85 | done | |
86 | done | |
87 | done | |
88 | done | |
89 | done | |
90 | # Provide a safe default value. | |
91 | : ${gdb_cv_func_ptrace_args='int,int,long,long'}] | |
92 | )] | |
93 | ) | |
94 | ||
eb7aa561 PA |
95 | ac_save_IFS=$IFS; IFS=',' |
96 | set dummy `echo "$gdb_cv_func_ptrace_args" | sed 's/\*/\*/g'` | |
97 | IFS=$ac_save_IFS | |
98 | shift | |
54019719 PA |
99 | AC_DEFINE_UNQUOTED(PTRACE_TYPE_ARG1, $[1], |
100 | [Define to the type of arg 1 for ptrace.]) | |
eb7aa561 PA |
101 | AC_DEFINE_UNQUOTED(PTRACE_TYPE_ARG3, $[3], |
102 | [Define to the type of arg 3 for ptrace.]) | |
103 | AC_DEFINE_UNQUOTED(PTRACE_TYPE_ARG4, $[4], | |
104 | [Define to the type of arg 4 for ptrace.]) | |
105 | if test -n "$[5]"; then | |
106 | AC_DEFINE_UNQUOTED(PTRACE_TYPE_ARG5, $[5], | |
107 | [Define to the type of arg 5 for ptrace.]) | |
108 | fi | |
109 | ]) |