mirror of https://github.com/proxmox/mirror_qemu
bsd-user: Implement procctl(2) along with necessary conversion functions.
Implement t2h_procctl_cmd, h2t_reaper_status, h2t_reaper_pidinfo and h2t/t2h reaper_kill conversion functions. Signed-off-by: Stacey Son <sson@FreeBSD.org> Signed-off-by: Karim Taha <kariem.taha2.7@gmail.com> Reviewed-by: Warner Losh <imp@bsdimp.com> Message-Id: <20230925182425.3163-22-kariem.taha2.7@gmail.com>master
Stacey Son
Warner Losh
parent
8632729060
commit
dcaa3dfda3
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@ -255,3 +255,226 @@ execve_end:
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return ret;
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}
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#include <sys/procctl.h>
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static abi_long
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t2h_procctl_cmd(int target_cmd, int *host_cmd)
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{
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switch (target_cmd) {
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case TARGET_PROC_SPROTECT:
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*host_cmd = PROC_SPROTECT;
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break;
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case TARGET_PROC_REAP_ACQUIRE:
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*host_cmd = PROC_REAP_ACQUIRE;
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break;
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case TARGET_PROC_REAP_RELEASE:
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*host_cmd = PROC_REAP_RELEASE;
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break;
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case TARGET_PROC_REAP_STATUS:
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*host_cmd = PROC_REAP_STATUS;
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break;
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case TARGET_PROC_REAP_KILL:
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*host_cmd = PROC_REAP_KILL;
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break;
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default:
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return -TARGET_EINVAL;
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}
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return 0;
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}
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static abi_long
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h2t_reaper_status(struct procctl_reaper_status *host_rs,
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abi_ulong target_rs_addr)
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{
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struct target_procctl_reaper_status *target_rs;
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if (!lock_user_struct(VERIFY_WRITE, target_rs, target_rs_addr, 0)) {
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return -TARGET_EFAULT;
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}
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__put_user(host_rs->rs_flags, &target_rs->rs_flags);
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__put_user(host_rs->rs_children, &target_rs->rs_children);
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__put_user(host_rs->rs_descendants, &target_rs->rs_descendants);
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__put_user(host_rs->rs_reaper, &target_rs->rs_reaper);
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__put_user(host_rs->rs_pid, &target_rs->rs_pid);
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unlock_user_struct(target_rs, target_rs_addr, 1);
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return 0;
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}
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static abi_long
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t2h_reaper_kill(abi_ulong target_rk_addr, struct procctl_reaper_kill *host_rk)
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{
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struct target_procctl_reaper_kill *target_rk;
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if (!lock_user_struct(VERIFY_READ, target_rk, target_rk_addr, 1)) {
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return -TARGET_EFAULT;
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}
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__get_user(host_rk->rk_sig, &target_rk->rk_sig);
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__get_user(host_rk->rk_flags, &target_rk->rk_flags);
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__get_user(host_rk->rk_subtree, &target_rk->rk_subtree);
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__get_user(host_rk->rk_killed, &target_rk->rk_killed);
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__get_user(host_rk->rk_fpid, &target_rk->rk_fpid);
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unlock_user_struct(target_rk, target_rk_addr, 0);
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return 0;
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}
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static abi_long
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h2t_reaper_kill(struct procctl_reaper_kill *host_rk, abi_ulong target_rk_addr)
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{
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struct target_procctl_reaper_kill *target_rk;
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if (!lock_user_struct(VERIFY_WRITE, target_rk, target_rk_addr, 0)) {
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return -TARGET_EFAULT;
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}
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__put_user(host_rk->rk_sig, &target_rk->rk_sig);
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__put_user(host_rk->rk_flags, &target_rk->rk_flags);
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__put_user(host_rk->rk_subtree, &target_rk->rk_subtree);
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__put_user(host_rk->rk_killed, &target_rk->rk_killed);
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__put_user(host_rk->rk_fpid, &target_rk->rk_fpid);
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unlock_user_struct(target_rk, target_rk_addr, 1);
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return 0;
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}
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static abi_long
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h2t_procctl_reaper_pidinfo(struct procctl_reaper_pidinfo *host_pi,
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abi_ulong target_pi_addr)
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{
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struct target_procctl_reaper_pidinfo *target_pi;
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if (!lock_user_struct(VERIFY_WRITE, target_pi, target_pi_addr, 0)) {
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return -TARGET_EFAULT;
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}
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__put_user(host_pi->pi_pid, &target_pi->pi_pid);
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__put_user(host_pi->pi_subtree, &target_pi->pi_subtree);
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__put_user(host_pi->pi_flags, &target_pi->pi_flags);
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unlock_user_struct(target_pi, target_pi_addr, 1);
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return 0;
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}
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abi_long
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do_freebsd_procctl(void *cpu_env, int idtype, abi_ulong arg2, abi_ulong arg3,
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abi_ulong arg4, abi_ulong arg5, abi_ulong arg6)
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{
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abi_long error = 0, target_rp_pids;
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void *data;
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int host_cmd, flags;
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uint32_t u, target_rp_count;
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g_autofree union {
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struct procctl_reaper_status rs;
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struct procctl_reaper_pids rp;
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struct procctl_reaper_kill rk;
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} host;
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struct target_procctl_reaper_pids *target_rp;
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id_t id; /* 64-bit */
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int target_cmd;
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abi_ulong target_arg;
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#if TARGET_ABI_BITS == 32
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/* See if we need to align the register pairs. */
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if (regpairs_aligned(cpu_env)) {
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id = (id_t)target_arg64(arg3, arg4);
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target_cmd = (int)arg5;
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target_arg = arg6;
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} else {
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id = (id_t)target_arg64(arg2, arg3);
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target_cmd = (int)arg4;
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target_arg = arg5;
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}
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#else
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id = (id_t)arg2;
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target_cmd = (int)arg3;
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target_arg = arg4;
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#endif
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error = t2h_procctl_cmd(target_cmd, &host_cmd);
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if (error) {
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return error;
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}
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switch (host_cmd) {
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case PROC_SPROTECT:
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data = &flags;
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break;
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case PROC_REAP_ACQUIRE:
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case PROC_REAP_RELEASE:
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if (target_arg == 0) {
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data = NULL;
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} else {
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error = -TARGET_EINVAL;
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}
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break;
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case PROC_REAP_STATUS:
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data = &host.rs;
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break;
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case PROC_REAP_GETPIDS:
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if (!lock_user_struct(VERIFY_READ, target_rp, target_arg, 1)) {
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return -TARGET_EFAULT;
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}
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__get_user(target_rp_count, &target_rp->rp_count);
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__get_user(target_rp_pids, &target_rp->rp_pids);
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unlock_user_struct(target_rp, target_arg, 0);
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host.rp.rp_count = target_rp_count;
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host.rp.rp_pids = g_try_new(struct procctl_reaper_pidinfo,
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target_rp_count);
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if (host.rp.rp_pids == NULL) {
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error = -TARGET_ENOMEM;
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} else {
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data = &host.rp;
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}
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break;
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case PROC_REAP_KILL:
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error = t2h_reaper_kill(target_arg, &host.rk);
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break;
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}
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if (error) {
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return error;
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}
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error = get_errno(procctl(idtype, id, host_cmd, data));
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if (error) {
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return error;
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}
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switch (host_cmd) {
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case PROC_SPROTECT:
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if (put_user_s32(flags, target_arg)) {
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return -TARGET_EFAULT;
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}
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break;
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case PROC_REAP_STATUS:
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error = h2t_reaper_status(&host.rs, target_arg);
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break;
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case PROC_REAP_GETPIDS:
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/* copyout reaper pidinfo */
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for (u = 0; u < target_rp_count; u++) {
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error = h2t_procctl_reaper_pidinfo(&host.rp.rp_pids[u],
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target_rp_pids +
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(u * sizeof(struct target_procctl_reaper_pidinfo)));
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if (error) {
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break;
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}
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}
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break;
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case PROC_REAP_KILL:
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error = h2t_reaper_kill(&host.rk, target_arg);
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break;
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}
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return error;
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}
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@ -367,6 +367,9 @@ static abi_long freebsd_syscall(void *cpu_env, int num, abi_long arg1,
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ret = do_bsd_setpriority(arg1, arg2, arg3);
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break;
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case TARGET_FREEBSD_NR_procctl: /* procctl(2) */
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ret = do_freebsd_procctl(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6);
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break;
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/*
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* File system calls.
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