]>
git.proxmox.com Git - mirror_qemu.git/blob - bsd-user/bsdload.c
2 * Load BSD executables.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, see <http://www.gnu.org/licenses/>.
18 #include "qemu/osdep.h"
22 #define TARGET_NGROUPS 32
24 /* ??? This should really be somewhere else. */
25 abi_long
memcpy_to_target(abi_ulong dest
, const void *src
,
30 host_ptr
= lock_user(VERIFY_WRITE
, dest
, len
, 0);
32 return -TARGET_EFAULT
;
34 memcpy(host_ptr
, src
, len
);
35 unlock_user(host_ptr
, dest
, 1);
39 static int count(char **vec
)
43 for (i
= 0; *vec
; i
++) {
50 static int prepare_binprm(struct bsd_binprm
*bprm
)
56 if (fstat(bprm
->fd
, &st
) < 0) {
61 if (!S_ISREG(mode
)) { /* Must be regular file */
64 if (!(mode
& 0111)) { /* Must have at least one execute bit set */
68 bprm
->e_uid
= geteuid();
69 bprm
->e_gid
= getegid();
73 bprm
->e_uid
= st
.st_uid
;
78 * If setgid is set but no group execute bit then this
79 * is a candidate for mandatory locking, not a setgid
82 if ((mode
& (S_ISGID
| S_IXGRP
)) == (S_ISGID
| S_IXGRP
)) {
83 bprm
->e_gid
= st
.st_gid
;
86 memset(bprm
->buf
, 0, sizeof(bprm
->buf
));
87 retval
= lseek(bprm
->fd
, 0L, SEEK_SET
);
89 retval
= read(bprm
->fd
, bprm
->buf
, 128);
92 perror("prepare_binprm");
99 /* Construct the envp and argv tables on the target stack. */
100 abi_ulong
loader_build_argptr(int envc
, int argc
, abi_ulong sp
,
101 abi_ulong stringp
, int push_ptr
)
103 int n
= sizeof(abi_ulong
);
107 sp
-= (envc
+ 1) * n
;
109 sp
-= (argc
+ 1) * n
;
112 /* FIXME - handle put_user() failures */
114 put_user_ual(envp
, sp
);
116 put_user_ual(argv
, sp
);
119 /* FIXME - handle put_user() failures */
120 put_user_ual(argc
, sp
);
123 /* FIXME - handle put_user() failures */
124 put_user_ual(stringp
, argv
);
126 stringp
+= target_strlen(stringp
) + 1;
128 /* FIXME - handle put_user() failures */
129 put_user_ual(0, argv
);
131 /* FIXME - handle put_user() failures */
132 put_user_ual(stringp
, envp
);
134 stringp
+= target_strlen(stringp
) + 1;
136 /* FIXME - handle put_user() failures */
137 put_user_ual(0, envp
);
142 static bool is_there(const char *candidate
)
146 /* XXX work around access(2) false positives for superuser */
147 if (access(candidate
, X_OK
) == 0 && stat(candidate
, &fin
) == 0 &&
148 S_ISREG(fin
.st_mode
) && (getuid() != 0 ||
149 (fin
.st_mode
& (S_IXUSR
| S_IXGRP
| S_IXOTH
)) != 0)) {
156 int loader_exec(const char *filename
, char **argv
, char **envp
,
157 struct target_pt_regs
*regs
, struct image_info
*infop
,
158 struct bsd_binprm
*bprm
)
160 char *path
, fullpath
[PATH_MAX
];
163 bprm
->p
= TARGET_PAGE_SIZE
* MAX_ARG_PAGES
;
164 for (i
= 0; i
< MAX_ARG_PAGES
; i
++) { /* clear page-table */
165 bprm
->page
[i
] = NULL
;
168 if (strchr(filename
, '/') != NULL
) {
169 path
= realpath(filename
, fullpath
);
171 /* Failed to resolve. */
174 if (!is_there(path
)) {
178 path
= g_find_program_in_path(filename
);
184 retval
= open(path
, O_RDONLY
);
190 bprm
->fullpath
= path
;
192 bprm
->filename
= (char *)filename
;
193 bprm
->argc
= count(argv
);
195 bprm
->envc
= count(envp
);
198 retval
= prepare_binprm(bprm
);
201 if (bprm
->buf
[0] == 0x7f
202 && bprm
->buf
[1] == 'E'
203 && bprm
->buf
[2] == 'L'
204 && bprm
->buf
[3] == 'F') {
205 retval
= load_elf_binary(bprm
, regs
, infop
);
207 fprintf(stderr
, "Unknown binary format\n");
213 /* success. Initialize important registers */
214 do_init_thread(regs
, infop
);
218 /* Something went wrong, return the inode and free the argument pages*/
219 for (i
= 0 ; i
< MAX_ARG_PAGES
; i
++) {
220 g_free(bprm
->page
[i
]);