* Get the filename for the given file descriptor.
* Note that this may return NULL (fail) if no longer cached in the kernel.
*/
-char *
-get_filename_from_fd(pid_t pid, int fd, char *filename, size_t len);
-char *
+static char *
get_filename_from_fd(pid_t pid, int fd, char *filename, size_t len)
{
char *ret = NULL;
return ret;
}
+/*
+ * execve/fexecve
+ */
+abi_long freebsd_exec_common(abi_ulong path_or_fd, abi_ulong guest_argp,
+ abi_ulong guest_envp, int do_fexec)
+{
+ char **argp, **envp, **qargp, **qarg1, **qarg0, **qargend;
+ int argc, envc;
+ abi_ulong gp;
+ abi_ulong addr;
+ char **q;
+ int total_size = 0;
+ void *p;
+ abi_long ret;
+
+ argc = 0;
+ for (gp = guest_argp; gp; gp += sizeof(abi_ulong)) {
+ if (get_user_ual(addr, gp)) {
+ return -TARGET_EFAULT;
+ }
+ if (!addr) {
+ break;
+ }
+ argc++;
+ }
+ envc = 0;
+ for (gp = guest_envp; gp; gp += sizeof(abi_ulong)) {
+ if (get_user_ual(addr, gp)) {
+ return -TARGET_EFAULT;
+ }
+ if (!addr) {
+ break;
+ }
+ envc++;
+ }
+
+ qarg0 = argp = g_new0(char *, argc + 9);
+ /* save the first argument for the emulator */
+ *argp++ = (char *)getprogname();
+ qargp = argp;
+ *argp++ = (char *)getprogname();
+ qarg1 = argp;
+ envp = g_new0(char *, envc + 1);
+ for (gp = guest_argp, q = argp; gp; gp += sizeof(abi_ulong), q++) {
+ if (get_user_ual(addr, gp)) {
+ ret = -TARGET_EFAULT;
+ goto execve_end;
+ }
+ if (!addr) {
+ break;
+ }
+ *q = lock_user_string(addr);
+ if (*q == NULL) {
+ ret = -TARGET_EFAULT;
+ goto execve_end;
+ }
+ total_size += strlen(*q) + 1;
+ }
+ *q++ = NULL;
+ qargend = q;
+
+ for (gp = guest_envp, q = envp; gp; gp += sizeof(abi_ulong), q++) {
+ if (get_user_ual(addr, gp)) {
+ ret = -TARGET_EFAULT;
+ goto execve_end;
+ }
+ if (!addr) {
+ break;
+ }
+ *q = lock_user_string(addr);
+ if (*q == NULL) {
+ ret = -TARGET_EFAULT;
+ goto execve_end;
+ }
+ total_size += strlen(*q) + 1;
+ }
+ *q = NULL;
+
+ /*
+ * This case will not be caught by the host's execve() if its
+ * page size is bigger than the target's.
+ */
+ if (total_size > MAX_ARG_PAGES * TARGET_PAGE_SIZE) {
+ ret = -TARGET_E2BIG;
+ goto execve_end;
+ }
+
+ if (do_fexec) {
+ if (((int)path_or_fd > 0 &&
+ is_target_elf_binary((int)path_or_fd)) == 1) {
+ char execpath[PATH_MAX];
+
+ /*
+ * The executable is an elf binary for the target
+ * arch. execve() it using the emulator if we can
+ * determine the filename path from the fd.
+ */
+ if (get_filename_from_fd(getpid(), (int)path_or_fd, execpath,
+ sizeof(execpath)) != NULL) {
+ memmove(qarg1 + 2, qarg1, (qargend - qarg1) * sizeof(*qarg1));
+ qarg1[1] = qarg1[0];
+ qarg1[0] = (char *)"-0";
+ qarg1 += 2;
+ qargend += 2;
+ *qarg1 = execpath;
+#ifndef DONT_INHERIT_INTERP_PREFIX
+ memmove(qarg1 + 2, qarg1, (qargend - qarg1) * sizeof(*qarg1));
+ *qarg1++ = (char *)"-L";
+ *qarg1++ = (char *)interp_prefix;
+#endif
+ ret = get_errno(execve(qemu_proc_pathname, qargp, envp));
+ } else {
+ /* Getting the filename path failed. */
+ ret = -TARGET_EBADF;
+ goto execve_end;
+ }
+ } else {
+ ret = get_errno(fexecve((int)path_or_fd, argp, envp));
+ }
+ } else {
+ int fd;
+
+ p = lock_user_string(path_or_fd);
+ if (p == NULL) {
+ ret = -TARGET_EFAULT;
+ goto execve_end;
+ }
+
+ /*
+ * Check the header and see if it a target elf binary. If so
+ * then execute using qemu user mode emulator.
+ */
+ fd = open(p, O_RDONLY | O_CLOEXEC);
+ if (fd > 0 && is_target_elf_binary(fd) == 1) {
+ close(fd);
+ /* execve() as a target binary using emulator. */
+ memmove(qarg1 + 2, qarg1, (qargend - qarg1) * sizeof(*qarg1));
+ qarg1[1] = qarg1[0];
+ qarg1[0] = (char *)"-0";
+ qarg1 += 2;
+ qargend += 2;
+ *qarg1 = (char *)p;
+#ifndef DONT_INHERIT_INTERP_PREFIX
+ memmove(qarg1 + 2, qarg1, (qargend - qarg1) * sizeof(*qarg1));
+ *qarg1++ = (char *)"-L";
+ *qarg1++ = (char *)interp_prefix;
+#endif
+ ret = get_errno(execve(qemu_proc_pathname, qargp, envp));
+ } else {
+ close(fd);
+ /* Execve() as a host native binary. */
+ ret = get_errno(execve(p, argp, envp));
+ }
+ unlock_user(p, path_or_fd, 0);
+ }
+
+execve_end:
+ for (gp = guest_argp, q = argp; *q; gp += sizeof(abi_ulong), q++) {
+ if (get_user_ual(addr, gp) || !addr) {
+ break;
+ }
+ unlock_user(*q, addr, 0);
+ }
+
+ for (gp = guest_envp, q = envp; *q; gp += sizeof(abi_ulong), q++) {
+ if (get_user_ual(addr, gp) || !addr) {
+ break;
+ }
+ unlock_user(*q, addr, 0);
+ }
+
+ g_free(qarg0);
+ g_free(envp);
+
+ return ret;
+}
+
+#include <sys/procctl.h>
+
+static abi_long
+t2h_procctl_cmd(int target_cmd, int *host_cmd)
+{
+ switch (target_cmd) {
+ case TARGET_PROC_SPROTECT:
+ *host_cmd = PROC_SPROTECT;
+ break;
+
+ case TARGET_PROC_REAP_ACQUIRE:
+ *host_cmd = PROC_REAP_ACQUIRE;
+ break;
+
+ case TARGET_PROC_REAP_RELEASE:
+ *host_cmd = PROC_REAP_RELEASE;
+ break;
+
+ case TARGET_PROC_REAP_STATUS:
+ *host_cmd = PROC_REAP_STATUS;
+ break;
+
+ case TARGET_PROC_REAP_KILL:
+ *host_cmd = PROC_REAP_KILL;
+ break;
+
+ default:
+ return -TARGET_EINVAL;
+ }
+
+ return 0;
+}
+
+static abi_long
+h2t_reaper_status(struct procctl_reaper_status *host_rs,
+ abi_ulong target_rs_addr)
+{
+ struct target_procctl_reaper_status *target_rs;
+
+ if (!lock_user_struct(VERIFY_WRITE, target_rs, target_rs_addr, 0)) {
+ return -TARGET_EFAULT;
+ }
+ __put_user(host_rs->rs_flags, &target_rs->rs_flags);
+ __put_user(host_rs->rs_children, &target_rs->rs_children);
+ __put_user(host_rs->rs_descendants, &target_rs->rs_descendants);
+ __put_user(host_rs->rs_reaper, &target_rs->rs_reaper);
+ __put_user(host_rs->rs_pid, &target_rs->rs_pid);
+ unlock_user_struct(target_rs, target_rs_addr, 1);
+
+ return 0;
+}
+
+static abi_long
+t2h_reaper_kill(abi_ulong target_rk_addr, struct procctl_reaper_kill *host_rk)
+{
+ struct target_procctl_reaper_kill *target_rk;
+
+ if (!lock_user_struct(VERIFY_READ, target_rk, target_rk_addr, 1)) {
+ return -TARGET_EFAULT;
+ }
+ __get_user(host_rk->rk_sig, &target_rk->rk_sig);
+ __get_user(host_rk->rk_flags, &target_rk->rk_flags);
+ __get_user(host_rk->rk_subtree, &target_rk->rk_subtree);
+ __get_user(host_rk->rk_killed, &target_rk->rk_killed);
+ __get_user(host_rk->rk_fpid, &target_rk->rk_fpid);
+ unlock_user_struct(target_rk, target_rk_addr, 0);
+
+ return 0;
+}
+
+static abi_long
+h2t_reaper_kill(struct procctl_reaper_kill *host_rk, abi_ulong target_rk_addr)
+{
+ struct target_procctl_reaper_kill *target_rk;
+
+ if (!lock_user_struct(VERIFY_WRITE, target_rk, target_rk_addr, 0)) {
+ return -TARGET_EFAULT;
+ }
+ __put_user(host_rk->rk_sig, &target_rk->rk_sig);
+ __put_user(host_rk->rk_flags, &target_rk->rk_flags);
+ __put_user(host_rk->rk_subtree, &target_rk->rk_subtree);
+ __put_user(host_rk->rk_killed, &target_rk->rk_killed);
+ __put_user(host_rk->rk_fpid, &target_rk->rk_fpid);
+ unlock_user_struct(target_rk, target_rk_addr, 1);
+
+ return 0;
+}
+
+static abi_long
+h2t_procctl_reaper_pidinfo(struct procctl_reaper_pidinfo *host_pi,
+ abi_ulong target_pi_addr)
+{
+ struct target_procctl_reaper_pidinfo *target_pi;
+
+ if (!lock_user_struct(VERIFY_WRITE, target_pi, target_pi_addr, 0)) {
+ return -TARGET_EFAULT;
+ }
+ __put_user(host_pi->pi_pid, &target_pi->pi_pid);
+ __put_user(host_pi->pi_subtree, &target_pi->pi_subtree);
+ __put_user(host_pi->pi_flags, &target_pi->pi_flags);
+ unlock_user_struct(target_pi, target_pi_addr, 1);
+
+ return 0;
+}
+
+abi_long
+do_freebsd_procctl(void *cpu_env, int idtype, abi_ulong arg2, abi_ulong arg3,
+ abi_ulong arg4, abi_ulong arg5, abi_ulong arg6)
+{
+ abi_long error = 0, target_rp_pids;
+ void *data;
+ int host_cmd, flags;
+ uint32_t u, target_rp_count;
+ g_autofree union {
+ struct procctl_reaper_status rs;
+ struct procctl_reaper_pids rp;
+ struct procctl_reaper_kill rk;
+ } host;
+ struct target_procctl_reaper_pids *target_rp;
+ id_t id; /* 64-bit */
+ int target_cmd;
+ abi_ulong target_arg;
+
+#if TARGET_ABI_BITS == 32
+ /* See if we need to align the register pairs. */
+ if (regpairs_aligned(cpu_env)) {
+ id = (id_t)target_arg64(arg3, arg4);
+ target_cmd = (int)arg5;
+ target_arg = arg6;
+ } else {
+ id = (id_t)target_arg64(arg2, arg3);
+ target_cmd = (int)arg4;
+ target_arg = arg5;
+ }
+#else
+ id = (id_t)arg2;
+ target_cmd = (int)arg3;
+ target_arg = arg4;
+#endif
+
+ error = t2h_procctl_cmd(target_cmd, &host_cmd);
+ if (error) {
+ return error;
+ }
+ switch (host_cmd) {
+ case PROC_SPROTECT:
+ data = &flags;
+ break;
+
+ case PROC_REAP_ACQUIRE:
+ case PROC_REAP_RELEASE:
+ if (target_arg == 0) {
+ data = NULL;
+ } else {
+ error = -TARGET_EINVAL;
+ }
+ break;
+
+ case PROC_REAP_STATUS:
+ data = &host.rs;
+ break;
+
+ case PROC_REAP_GETPIDS:
+ if (!lock_user_struct(VERIFY_READ, target_rp, target_arg, 1)) {
+ return -TARGET_EFAULT;
+ }
+ __get_user(target_rp_count, &target_rp->rp_count);
+ __get_user(target_rp_pids, &target_rp->rp_pids);
+ unlock_user_struct(target_rp, target_arg, 0);
+ host.rp.rp_count = target_rp_count;
+ host.rp.rp_pids = g_try_new(struct procctl_reaper_pidinfo,
+ target_rp_count);
+
+ if (host.rp.rp_pids == NULL) {
+ error = -TARGET_ENOMEM;
+ } else {
+ data = &host.rp;
+ }
+ break;
+
+ case PROC_REAP_KILL:
+ error = t2h_reaper_kill(target_arg, &host.rk);
+ break;
+ }
+
+ if (error) {
+ return error;
+ }
+ error = get_errno(procctl(idtype, id, host_cmd, data));
+
+ if (error) {
+ return error;
+ }
+ switch (host_cmd) {
+ case PROC_SPROTECT:
+ if (put_user_s32(flags, target_arg)) {
+ return -TARGET_EFAULT;
+ }
+ break;
+
+ case PROC_REAP_STATUS:
+ error = h2t_reaper_status(&host.rs, target_arg);
+ break;
+
+ case PROC_REAP_GETPIDS:
+ /* copyout reaper pidinfo */
+ for (u = 0; u < target_rp_count; u++) {
+ error = h2t_procctl_reaper_pidinfo(&host.rp.rp_pids[u],
+ target_rp_pids +
+ (u * sizeof(struct target_procctl_reaper_pidinfo)));
+ if (error) {
+ break;
+ }
+ }
+ break;
+
+ case PROC_REAP_KILL:
+ error = h2t_reaper_kill(&host.rk, target_arg);
+ break;
+ }
+
+ return error;
+}
projects / mirror_qemu.git / blobdiff