diff options
Diffstat (limited to 'qemu/bsd-user/bsdload.c')
| -rw-r--r-- | qemu/bsd-user/bsdload.c | 196 |
1 files changed, 0 insertions, 196 deletions
diff --git a/qemu/bsd-user/bsdload.c b/qemu/bsd-user/bsdload.c deleted file mode 100644 index 94eec363b..000000000 --- a/qemu/bsd-user/bsdload.c +++ /dev/null @@ -1,196 +0,0 @@ -/* Code for loading BSD executables. Mostly linux kernel code. */ - -#include "qemu/osdep.h" - -#include "qemu.h" - -#define TARGET_NGROUPS 32 - -/* ??? This should really be somewhere else. */ -abi_long memcpy_to_target(abi_ulong dest, const void *src, - unsigned long len) -{ - void *host_ptr; - - host_ptr = lock_user(VERIFY_WRITE, dest, len, 0); - if (!host_ptr) - return -TARGET_EFAULT; - memcpy(host_ptr, src, len); - unlock_user(host_ptr, dest, 1); - return 0; -} - -static int in_group_p(gid_t g) -{ - /* return TRUE if we're in the specified group, FALSE otherwise */ - int ngroup; - int i; - gid_t grouplist[TARGET_NGROUPS]; - - ngroup = getgroups(TARGET_NGROUPS, grouplist); - for(i = 0; i < ngroup; i++) { - if(grouplist[i] == g) { - return 1; - } - } - return 0; -} - -static int count(char ** vec) -{ - int i; - - for(i = 0; *vec; i++) { - vec++; - } - - return(i); -} - -static int prepare_binprm(struct linux_binprm *bprm) -{ - struct stat st; - int mode; - int retval, id_change; - - if(fstat(bprm->fd, &st) < 0) { - return(-errno); - } - - mode = st.st_mode; - if(!S_ISREG(mode)) { /* Must be regular file */ - return(-EACCES); - } - if(!(mode & 0111)) { /* Must have at least one execute bit set */ - return(-EACCES); - } - - bprm->e_uid = geteuid(); - bprm->e_gid = getegid(); - id_change = 0; - - /* Set-uid? */ - if(mode & S_ISUID) { - bprm->e_uid = st.st_uid; - if(bprm->e_uid != geteuid()) { - id_change = 1; - } - } - - /* Set-gid? */ - /* - * If setgid is set but no group execute bit then this - * is a candidate for mandatory locking, not a setgid - * executable. - */ - if ((mode & (S_ISGID | S_IXGRP)) == (S_ISGID | S_IXGRP)) { - bprm->e_gid = st.st_gid; - if (!in_group_p(bprm->e_gid)) { - id_change = 1; - } - } - - memset(bprm->buf, 0, sizeof(bprm->buf)); - retval = lseek(bprm->fd, 0L, SEEK_SET); - if(retval >= 0) { - retval = read(bprm->fd, bprm->buf, 128); - } - if(retval < 0) { - perror("prepare_binprm"); - exit(-1); - /* return(-errno); */ - } - else { - return(retval); - } -} - -/* Construct the envp and argv tables on the target stack. */ -abi_ulong loader_build_argptr(int envc, int argc, abi_ulong sp, - abi_ulong stringp, int push_ptr) -{ - int n = sizeof(abi_ulong); - abi_ulong envp; - abi_ulong argv; - - sp -= (envc + 1) * n; - envp = sp; - sp -= (argc + 1) * n; - argv = sp; - if (push_ptr) { - /* FIXME - handle put_user() failures */ - sp -= n; - put_user_ual(envp, sp); - sp -= n; - put_user_ual(argv, sp); - } - sp -= n; - /* FIXME - handle put_user() failures */ - put_user_ual(argc, sp); - - while (argc-- > 0) { - /* FIXME - handle put_user() failures */ - put_user_ual(stringp, argv); - argv += n; - stringp += target_strlen(stringp) + 1; - } - /* FIXME - handle put_user() failures */ - put_user_ual(0, argv); - while (envc-- > 0) { - /* FIXME - handle put_user() failures */ - put_user_ual(stringp, envp); - envp += n; - stringp += target_strlen(stringp) + 1; - } - /* FIXME - handle put_user() failures */ - put_user_ual(0, envp); - - return sp; -} - -int loader_exec(const char * filename, char ** argv, char ** envp, - struct target_pt_regs * regs, struct image_info *infop) -{ - struct linux_binprm bprm; - int retval; - int i; - - bprm.p = TARGET_PAGE_SIZE*MAX_ARG_PAGES-sizeof(unsigned int); - for (i=0 ; i<MAX_ARG_PAGES ; i++) /* clear page-table */ - bprm.page[i] = NULL; - retval = open(filename, O_RDONLY); - if (retval < 0) - return retval; - bprm.fd = retval; - bprm.filename = (char *)filename; - bprm.argc = count(argv); - bprm.argv = argv; - bprm.envc = count(envp); - bprm.envp = envp; - - retval = prepare_binprm(&bprm); - - if(retval>=0) { - if (bprm.buf[0] == 0x7f - && bprm.buf[1] == 'E' - && bprm.buf[2] == 'L' - && bprm.buf[3] == 'F') { - retval = load_elf_binary(&bprm,regs,infop); - } else { - fprintf(stderr, "Unknown binary format\n"); - return -1; - } - } - - if(retval>=0) { - /* success. Initialize important registers */ - do_init_thread(regs, infop); - return retval; - } - - /* Something went wrong, return the inode and free the argument pages*/ - for (i=0 ; i<MAX_ARG_PAGES ; i++) { - g_free(bprm.page[i]); - } - return(retval); -} |