From 146aad745b6726fb3c9848ef3a2b1fdf71ebb3be Mon Sep 17 00:00:00 2001 From: Marcel Moolenaar Date: Tue, 22 Aug 2000 02:24:02 +0000 Subject: [PATCH] Collect the MD syscalls from /sys/compat/linux here. Since this is a new file, fix most of the style bugs at the same time. --- sys/alpha/linux/linux_machdep.c | 634 ++++++++++++++++++++++++++++++++ sys/i386/linux/linux_machdep.c | 634 ++++++++++++++++++++++++++++++++ 2 files changed, 1268 insertions(+) create mode 100644 sys/alpha/linux/linux_machdep.c create mode 100644 sys/i386/linux/linux_machdep.c diff --git a/sys/alpha/linux/linux_machdep.c b/sys/alpha/linux/linux_machdep.c new file mode 100644 index 000000000000..99b7ffdf57ca --- /dev/null +++ b/sys/alpha/linux/linux_machdep.c @@ -0,0 +1,634 @@ +/*- + * Copyright (c) 2000 Marcel Moolenaar + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer + * in this position and unchanged. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software withough specific prior written permission + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +#include +#include +#include +#include +#include + +struct linux_descriptor { + unsigned int entry_number; + unsigned long base_addr; + unsigned int limit; + unsigned int seg_32bit:1; + unsigned int contents:2; + unsigned int read_exec_only:1; + unsigned int limit_in_pages:1; + unsigned int seg_not_present:1; + unsigned int useable:1; +}; + +struct linux_select_argv { + int nfds; + fd_set *readfds; + fd_set *writefds; + fd_set *exceptfds; + struct timeval *timeout; +}; + +int +linux_execve(struct proc *p, struct linux_execve_args *args) +{ + struct execve_args bsd; + caddr_t sg; + + sg = stackgap_init(); + CHECKALTEXIST(p, &sg, args->path); + +#ifdef DEBUG + printf("Linux-emul(%d): execve(%s)\n", + p->p_pid, args->path); +#endif + + bsd.fname = args->path; + bsd.argv = args->argp; + bsd.envv = args->envp; + return (execve(p, &bsd)); +} + +int +linux_ipc(struct proc *p, struct linux_ipc_args *args) +{ + switch (args->what) { + case LINUX_SEMOP: + return (linux_semop(p, args)); + case LINUX_SEMGET: + return (linux_semget(p, args)); + case LINUX_SEMCTL: + return (linux_semctl(p, args)); + case LINUX_MSGSND: + return (linux_msgsnd(p, args)); + case LINUX_MSGRCV: + return (linux_msgrcv(p, args)); + case LINUX_MSGGET: + return (linux_msgget(p, args)); + case LINUX_MSGCTL: + return (linux_msgctl(p, args)); + case LINUX_SHMAT: + return (linux_shmat(p, args)); + case LINUX_SHMDT: + return (linux_shmdt(p, args)); + case LINUX_SHMGET: + return (linux_shmget(p, args)); + case LINUX_SHMCTL: + return (linux_shmctl(p, args)); + } + + uprintf("LINUX: 'ipc' typ=%d not implemented\n", args->what); + return (ENOSYS); +} + +int +linux_select(struct proc *p, struct linux_select_args *args) +{ + struct linux_select_argv linux_args; + struct linux_newselect_args newsel; + int error; + +#ifdef SELECT_DEBUG + printf("Linux-emul(%ld): select(%x)\n", (long)p->p_pid, args->ptr); +#endif + + error = copyin(args->ptr, &linux_args, sizeof(linux_args)); + if (error) + return (error); + + newsel.nfds = linux_args.nfds; + newsel.readfds = linux_args.readfds; + newsel.writefds = linux_args.writefds; + newsel.exceptfds = linux_args.exceptfds; + newsel.timeout = linux_args.timeout; + return (linux_newselect(p, &newsel)); +} + +int +linux_fork(struct proc *p, struct linux_fork_args *args) +{ + int error; + +#ifdef DEBUG + printf("Linux-emul(%ld): fork()\n", (long)p->p_pid); +#endif + + if ((error = fork(p, (struct fork_args *)args)) != 0) + return (error); + + if (p->p_retval[1] == 1) + p->p_retval[0] = 0; + return (0); +} + +int +linux_vfork(struct proc *p, struct linux_vfork_args *args) +{ + int error; + +#ifdef DEBUG + printf("Linux-emul(%ld): vfork()\n", (long)p->p_pid); +#endif + + if ((error = vfork(p, (struct vfork_args *)args)) != 0) + return (error); + /* Are we the child? */ + if (p->p_retval[1] == 1) + p->p_retval[0] = 0; + return (0); +} + +#define CLONE_VM 0x100 +#define CLONE_FS 0x200 +#define CLONE_FILES 0x400 +#define CLONE_SIGHAND 0x800 +#define CLONE_PID 0x1000 + +int +linux_clone(struct proc *p, struct linux_clone_args *args) +{ + int error, ff = RFPROC; + struct proc *p2; + int exit_signal; + vm_offset_t start; + struct rfork_args rf_args; + +#ifdef DEBUG + if (args->flags & CLONE_PID) + printf("linux_clone(%ld): CLONE_PID not yet supported\n", + (long)p->p_pid); + printf("linux_clone(%ld): invoked with flags %x and stack %x\n", + (long)p->p_pid, (unsigned int)args->flags, + (unsigned int)args->stack); +#endif + + if (!args->stack) + return (EINVAL); + + exit_signal = args->flags & 0x000000ff; + if (exit_signal >= LINUX_NSIG) + return (EINVAL); + + if (exit_signal <= LINUX_SIGTBLSZ) + exit_signal = linux_to_bsd_signal[_SIG_IDX(exit_signal)]; + + /* RFTHREAD probably not necessary here, but it shouldn't hurt */ + ff |= RFTHREAD; + + if (args->flags & CLONE_VM) + ff |= RFMEM; + if (args->flags & CLONE_SIGHAND) + ff |= RFSIGSHARE; + if (!(args->flags & CLONE_FILES)) + ff |= RFFDG; + + error = 0; + start = 0; + + rf_args.flags = ff; + if ((error = rfork(p, &rf_args)) != 0) + return (error); + + p2 = pfind(p->p_retval[0]); + if (p2 == 0) + return (ESRCH); + + p2->p_sigparent = exit_signal; + p2->p_md.md_regs->tf_esp = (unsigned int)args->stack; + +#ifdef DEBUG + printf ("linux_clone(%ld): successful rfork to %ld\n", (long)p->p_pid, + (long)p2->p_pid); +#endif + + return (0); +} + +/* XXX move */ +struct linux_mmap_argv { + linux_caddr_t addr; + int len; + int prot; + int flags; + int fd; + int pos; +}; + +#define STACK_SIZE (2 * 1024 * 1024) +#define GUARD_SIZE (4 * PAGE_SIZE) + +int +linux_mmap(struct proc *p, struct linux_mmap_args *args) +{ + struct mmap_args /* { + caddr_t addr; + size_t len; + int prot; + int flags; + int fd; + long pad; + off_t pos; + } */ bsd_args; + int error; + struct linux_mmap_argv linux_args; + + error = copyin(args->ptr, &linux_args, sizeof(linux_args)); + if (error) + return (error); + +#ifdef DEBUG + printf("Linux-emul(%ld): mmap(%p, %d, %d, 0x%08x, %d, %d)", + (long)p->p_pid, (void *)linux_args.addr, linux_args.len, + linux_args.prot, linux_args.flags, linux_args.fd, linux_args.pos); +#endif + + bsd_args.flags = 0; + if (linux_args.flags & LINUX_MAP_SHARED) + bsd_args.flags |= MAP_SHARED; + if (linux_args.flags & LINUX_MAP_PRIVATE) + bsd_args.flags |= MAP_PRIVATE; + if (linux_args.flags & LINUX_MAP_FIXED) + bsd_args.flags |= MAP_FIXED; + if (linux_args.flags & LINUX_MAP_ANON) + bsd_args.flags |= MAP_ANON; + if (linux_args.flags & LINUX_MAP_GROWSDOWN) { + bsd_args.flags |= MAP_STACK; + + /* The linux MAP_GROWSDOWN option does not limit auto + * growth of the region. Linux mmap with this option + * takes as addr the inital BOS, and as len, the initial + * region size. It can then grow down from addr without + * limit. However, linux threads has an implicit internal + * limit to stack size of STACK_SIZE. Its just not + * enforced explicitly in linux. But, here we impose + * a limit of (STACK_SIZE - GUARD_SIZE) on the stack + * region, since we can do this with our mmap. + * + * Our mmap with MAP_STACK takes addr as the maximum + * downsize limit on BOS, and as len the max size of + * the region. It them maps the top SGROWSIZ bytes, + * and autgrows the region down, up to the limit + * in addr. + * + * If we don't use the MAP_STACK option, the effect + * of this code is to allocate a stack region of a + * fixed size of (STACK_SIZE - GUARD_SIZE). + */ + + /* This gives us TOS */ + bsd_args.addr = linux_args.addr + linux_args.len; + + /* This gives us our maximum stack size */ + if (linux_args.len > STACK_SIZE - GUARD_SIZE) + bsd_args.len = linux_args.len; + else + bsd_args.len = STACK_SIZE - GUARD_SIZE; + + /* This gives us a new BOS. If we're using VM_STACK, then + * mmap will just map the top SGROWSIZ bytes, and let + * the stack grow down to the limit at BOS. If we're + * not using VM_STACK we map the full stack, since we + * don't have a way to autogrow it. + */ + bsd_args.addr -= bsd_args.len; + } else { + bsd_args.addr = linux_args.addr; + bsd_args.len = linux_args.len; + } + + bsd_args.prot = linux_args.prot | PROT_READ; /* always required */ + if (linux_args.flags & LINUX_MAP_ANON) + bsd_args.fd = -1; + else + bsd_args.fd = linux_args.fd; + bsd_args.pos = linux_args.pos; + bsd_args.pad = 0; + +#ifdef DEBUG + printf("-> (%p, %d, %d, 0x%08x, %d, %d)\n", (void *)bsd_args.addr, + bsd_args.len, bsd_args.prot, bsd_args.flags, bsd_args.fd, + (int)bsd_args.pos); +#endif + + return (mmap(p, &bsd_args)); +} + +int +linux_pipe(struct proc *p, struct linux_pipe_args *args) +{ + int error; + int reg_edx; + +#ifdef DEBUG + printf("Linux-emul(%ld): pipe(*)\n", (long)p->p_pid); +#endif + + reg_edx = p->p_retval[1]; + error = pipe(p, 0); + if (error) { + p->p_retval[1] = reg_edx; + return (error); + } + + error = copyout(p->p_retval, args->pipefds, 2*sizeof(int)); + if (error) { + p->p_retval[1] = reg_edx; + return (error); + } + + p->p_retval[1] = reg_edx; + p->p_retval[0] = 0; + return (0); +} + +int +linux_ioperm(struct proc *p, struct linux_ioperm_args *args) +{ + struct sysarch_args sa; + struct i386_ioperm_args *iia; + caddr_t sg; + + sg = stackgap_init(); + iia = stackgap_alloc(&sg, sizeof(struct i386_ioperm_args)); + iia->start = args->start; + iia->length = args->length; + iia->enable = args->enable; + sa.op = I386_SET_IOPERM; + sa.parms = (char *)iia; + return (sysarch(p, &sa)); +} + +int +linux_iopl(struct proc *p, struct linux_iopl_args *args) +{ + int error; + + if (args->level < 0 || args->level > 3) + return (EINVAL); + if ((error = suser(p)) != 0) + return (error); + if (securelevel > 0) + return (EPERM); + p->p_md.md_regs->tf_eflags = (p->p_md.md_regs->tf_eflags & ~PSL_IOPL) | + (args->level * (PSL_IOPL / 3)); + return (0); +} + +int +linux_modify_ldt(p, uap) + struct proc *p; + struct linux_modify_ldt_args *uap; +{ + int error; + caddr_t sg; + struct sysarch_args args; + struct i386_ldt_args *ldt; + struct linux_descriptor ld; + union descriptor *desc; + + sg = stackgap_init(); + + if (uap->ptr == NULL) + return (EINVAL); + + switch (uap->func) { + case 0x00: /* read_ldt */ + ldt = stackgap_alloc(&sg, sizeof(*ldt)); + ldt->start = 0; + ldt->descs = uap->ptr; + ldt->num = uap->bytecount / sizeof(union descriptor); + args.op = I386_GET_LDT; + args.parms = (char*)ldt; + error = sysarch(p, &args); + p->p_retval[0] *= sizeof(union descriptor); + break; + case 0x01: /* write_ldt */ + case 0x11: /* write_ldt */ + if (uap->bytecount != sizeof(ld)) + return (EINVAL); + + error = copyin(uap->ptr, &ld, sizeof(ld)); + if (error) + return (error); + + ldt = stackgap_alloc(&sg, sizeof(*ldt)); + desc = stackgap_alloc(&sg, sizeof(*desc)); + ldt->start = ld.entry_number; + ldt->descs = desc; + ldt->num = 1; + desc->sd.sd_lolimit = (ld.limit & 0x0000ffff); + desc->sd.sd_hilimit = (ld.limit & 0x000f0000) >> 16; + desc->sd.sd_lobase = (ld.base_addr & 0x00ffffff); + desc->sd.sd_hibase = (ld.base_addr & 0xff000000) >> 24; + desc->sd.sd_type = SDT_MEMRO | ((ld.read_exec_only ^ 1) << 1) | + (ld.contents << 2); + desc->sd.sd_dpl = 3; + desc->sd.sd_p = (ld.seg_not_present ^ 1); + desc->sd.sd_xx = 0; + desc->sd.sd_def32 = ld.seg_32bit; + desc->sd.sd_gran = ld.limit_in_pages; + args.op = I386_SET_LDT; + args.parms = (char*)ldt; + error = sysarch(p, &args); + break; + default: + error = EINVAL; + break; + } + + if (error == EOPNOTSUPP) { + printf("linux: modify_ldt needs kernel option USER_LDT\n"); + error = ENOSYS; + } + + return (error); +} + +int +linux_sigaction(struct proc *p, struct linux_sigaction_args *args) +{ + linux_osigaction_t osa; + linux_sigaction_t act, oact; + int error; + +#ifdef DEBUG + printf("Linux-emul(%ld): sigaction(%d, %p, %p)\n", (long)p->p_pid, + args->sig, (void *)args->nsa, (void *)args->osa); +#endif + + if (args->nsa != NULL) { + error = copyin(args->nsa, &osa, sizeof(linux_osigaction_t)); + if (error) + return (error); + act.lsa_handler = osa.lsa_handler; + act.lsa_flags = osa.lsa_flags; + act.lsa_restorer = osa.lsa_restorer; + LINUX_SIGEMPTYSET(act.lsa_mask); + act.lsa_mask.__bits[0] = osa.lsa_mask; + } + + error = linux_do_sigaction(p, args->sig, args->nsa ? &act : NULL, + args->osa ? &oact : NULL); + + if (args->osa != NULL && !error) { + osa.lsa_handler = oact.lsa_handler; + osa.lsa_flags = oact.lsa_flags; + osa.lsa_restorer = oact.lsa_restorer; + osa.lsa_mask = oact.lsa_mask.__bits[0]; + error = copyout(&osa, args->osa, sizeof(linux_osigaction_t)); + } + + return (error); +} + +/* + * Linux has two extra args, restart and oldmask. We dont use these, + * but it seems that "restart" is actually a context pointer that + * enables the signal to happen with a different register set. + */ +int +linux_sigsuspend(struct proc *p, struct linux_sigsuspend_args *args) +{ + struct sigsuspend_args bsd; + sigset_t *sigmask; + linux_sigset_t mask; + caddr_t sg = stackgap_init(); + +#ifdef DEBUG + printf("Linux-emul(%ld): sigsuspend(%08lx)\n", + (long)p->p_pid, (unsigned long)args->mask); +#endif + + sigmask = stackgap_alloc(&sg, sizeof(sigset_t)); + LINUX_SIGEMPTYSET(mask); + mask.__bits[0] = args->mask; + linux_to_bsd_sigset(&mask, sigmask); + bsd.sigmask = sigmask; + return (sigsuspend(p, &bsd)); +} + +int +linux_rt_sigsuspend(p, uap) + struct proc *p; + struct linux_rt_sigsuspend_args *uap; +{ + linux_sigset_t lmask; + sigset_t *bmask; + struct sigsuspend_args bsd; + caddr_t sg = stackgap_init(); + int error; + +#ifdef DEBUG + printf("Linux-emul(%ld): rt_sigsuspend(%p, %d)\n", (long)p->p_pid, + (void *)uap->newset, uap->sigsetsize); +#endif + + if (uap->sigsetsize != sizeof(linux_sigset_t)) + return (EINVAL); + + error = copyin(uap->newset, &lmask, sizeof(linux_sigset_t)); + if (error) + return (error); + + bmask = stackgap_alloc(&sg, sizeof(sigset_t)); + linux_to_bsd_sigset(&lmask, bmask); + bsd.sigmask = bmask; + return (sigsuspend(p, &bsd)); +} + +int +linux_pause(struct proc *p, struct linux_pause_args *args) +{ + struct sigsuspend_args bsd; + sigset_t *sigmask; + caddr_t sg = stackgap_init(); + +#ifdef DEBUG + printf("Linux-emul(%d): pause()\n", p->p_pid); +#endif + + sigmask = stackgap_alloc(&sg, sizeof(sigset_t)); + *sigmask = p->p_sigmask; + bsd.sigmask = sigmask; + return (sigsuspend(p, &bsd)); +} + +int +linux_sigaltstack(p, uap) + struct proc *p; + struct linux_sigaltstack_args *uap; +{ + struct sigaltstack_args bsd; + stack_t *ss, *oss; + linux_stack_t lss; + int error; + caddr_t sg = stackgap_init(); + +#ifdef DEBUG + printf("Linux-emul(%ld): sigaltstack(%p, %p)\n", + (long)p->p_pid, uap->uss, uap->uoss); +#endif + + error = copyin(uap->uss, &lss, sizeof(linux_stack_t)); + if (error) + return (error); + + ss = stackgap_alloc(&sg, sizeof(stack_t)); + ss->ss_sp = lss.ss_sp; + ss->ss_size = lss.ss_size; + ss->ss_flags = lss.ss_flags; + + oss = (uap->uoss != NULL) + ? stackgap_alloc(&sg, sizeof(stack_t)) + : NULL; + + bsd.ss = ss; + bsd.oss = oss; + error = sigaltstack(p, &bsd); + + if (!error && oss != NULL) { + lss.ss_sp = oss->ss_sp; + lss.ss_size = oss->ss_size; + lss.ss_flags = oss->ss_flags; + error = copyout(&lss, uap->uoss, sizeof(linux_stack_t)); + } + + return (error); +} diff --git a/sys/i386/linux/linux_machdep.c b/sys/i386/linux/linux_machdep.c new file mode 100644 index 000000000000..99b7ffdf57ca --- /dev/null +++ b/sys/i386/linux/linux_machdep.c @@ -0,0 +1,634 @@ +/*- + * Copyright (c) 2000 Marcel Moolenaar + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer + * in this position and unchanged. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software withough specific prior written permission + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +#include +#include +#include +#include +#include + +struct linux_descriptor { + unsigned int entry_number; + unsigned long base_addr; + unsigned int limit; + unsigned int seg_32bit:1; + unsigned int contents:2; + unsigned int read_exec_only:1; + unsigned int limit_in_pages:1; + unsigned int seg_not_present:1; + unsigned int useable:1; +}; + +struct linux_select_argv { + int nfds; + fd_set *readfds; + fd_set *writefds; + fd_set *exceptfds; + struct timeval *timeout; +}; + +int +linux_execve(struct proc *p, struct linux_execve_args *args) +{ + struct execve_args bsd; + caddr_t sg; + + sg = stackgap_init(); + CHECKALTEXIST(p, &sg, args->path); + +#ifdef DEBUG + printf("Linux-emul(%d): execve(%s)\n", + p->p_pid, args->path); +#endif + + bsd.fname = args->path; + bsd.argv = args->argp; + bsd.envv = args->envp; + return (execve(p, &bsd)); +} + +int +linux_ipc(struct proc *p, struct linux_ipc_args *args) +{ + switch (args->what) { + case LINUX_SEMOP: + return (linux_semop(p, args)); + case LINUX_SEMGET: + return (linux_semget(p, args)); + case LINUX_SEMCTL: + return (linux_semctl(p, args)); + case LINUX_MSGSND: + return (linux_msgsnd(p, args)); + case LINUX_MSGRCV: + return (linux_msgrcv(p, args)); + case LINUX_MSGGET: + return (linux_msgget(p, args)); + case LINUX_MSGCTL: + return (linux_msgctl(p, args)); + case LINUX_SHMAT: + return (linux_shmat(p, args)); + case LINUX_SHMDT: + return (linux_shmdt(p, args)); + case LINUX_SHMGET: + return (linux_shmget(p, args)); + case LINUX_SHMCTL: + return (linux_shmctl(p, args)); + } + + uprintf("LINUX: 'ipc' typ=%d not implemented\n", args->what); + return (ENOSYS); +} + +int +linux_select(struct proc *p, struct linux_select_args *args) +{ + struct linux_select_argv linux_args; + struct linux_newselect_args newsel; + int error; + +#ifdef SELECT_DEBUG + printf("Linux-emul(%ld): select(%x)\n", (long)p->p_pid, args->ptr); +#endif + + error = copyin(args->ptr, &linux_args, sizeof(linux_args)); + if (error) + return (error); + + newsel.nfds = linux_args.nfds; + newsel.readfds = linux_args.readfds; + newsel.writefds = linux_args.writefds; + newsel.exceptfds = linux_args.exceptfds; + newsel.timeout = linux_args.timeout; + return (linux_newselect(p, &newsel)); +} + +int +linux_fork(struct proc *p, struct linux_fork_args *args) +{ + int error; + +#ifdef DEBUG + printf("Linux-emul(%ld): fork()\n", (long)p->p_pid); +#endif + + if ((error = fork(p, (struct fork_args *)args)) != 0) + return (error); + + if (p->p_retval[1] == 1) + p->p_retval[0] = 0; + return (0); +} + +int +linux_vfork(struct proc *p, struct linux_vfork_args *args) +{ + int error; + +#ifdef DEBUG + printf("Linux-emul(%ld): vfork()\n", (long)p->p_pid); +#endif + + if ((error = vfork(p, (struct vfork_args *)args)) != 0) + return (error); + /* Are we the child? */ + if (p->p_retval[1] == 1) + p->p_retval[0] = 0; + return (0); +} + +#define CLONE_VM 0x100 +#define CLONE_FS 0x200 +#define CLONE_FILES 0x400 +#define CLONE_SIGHAND 0x800 +#define CLONE_PID 0x1000 + +int +linux_clone(struct proc *p, struct linux_clone_args *args) +{ + int error, ff = RFPROC; + struct proc *p2; + int exit_signal; + vm_offset_t start; + struct rfork_args rf_args; + +#ifdef DEBUG + if (args->flags & CLONE_PID) + printf("linux_clone(%ld): CLONE_PID not yet supported\n", + (long)p->p_pid); + printf("linux_clone(%ld): invoked with flags %x and stack %x\n", + (long)p->p_pid, (unsigned int)args->flags, + (unsigned int)args->stack); +#endif + + if (!args->stack) + return (EINVAL); + + exit_signal = args->flags & 0x000000ff; + if (exit_signal >= LINUX_NSIG) + return (EINVAL); + + if (exit_signal <= LINUX_SIGTBLSZ) + exit_signal = linux_to_bsd_signal[_SIG_IDX(exit_signal)]; + + /* RFTHREAD probably not necessary here, but it shouldn't hurt */ + ff |= RFTHREAD; + + if (args->flags & CLONE_VM) + ff |= RFMEM; + if (args->flags & CLONE_SIGHAND) + ff |= RFSIGSHARE; + if (!(args->flags & CLONE_FILES)) + ff |= RFFDG; + + error = 0; + start = 0; + + rf_args.flags = ff; + if ((error = rfork(p, &rf_args)) != 0) + return (error); + + p2 = pfind(p->p_retval[0]); + if (p2 == 0) + return (ESRCH); + + p2->p_sigparent = exit_signal; + p2->p_md.md_regs->tf_esp = (unsigned int)args->stack; + +#ifdef DEBUG + printf ("linux_clone(%ld): successful rfork to %ld\n", (long)p->p_pid, + (long)p2->p_pid); +#endif + + return (0); +} + +/* XXX move */ +struct linux_mmap_argv { + linux_caddr_t addr; + int len; + int prot; + int flags; + int fd; + int pos; +}; + +#define STACK_SIZE (2 * 1024 * 1024) +#define GUARD_SIZE (4 * PAGE_SIZE) + +int +linux_mmap(struct proc *p, struct linux_mmap_args *args) +{ + struct mmap_args /* { + caddr_t addr; + size_t len; + int prot; + int flags; + int fd; + long pad; + off_t pos; + } */ bsd_args; + int error; + struct linux_mmap_argv linux_args; + + error = copyin(args->ptr, &linux_args, sizeof(linux_args)); + if (error) + return (error); + +#ifdef DEBUG + printf("Linux-emul(%ld): mmap(%p, %d, %d, 0x%08x, %d, %d)", + (long)p->p_pid, (void *)linux_args.addr, linux_args.len, + linux_args.prot, linux_args.flags, linux_args.fd, linux_args.pos); +#endif + + bsd_args.flags = 0; + if (linux_args.flags & LINUX_MAP_SHARED) + bsd_args.flags |= MAP_SHARED; + if (linux_args.flags & LINUX_MAP_PRIVATE) + bsd_args.flags |= MAP_PRIVATE; + if (linux_args.flags & LINUX_MAP_FIXED) + bsd_args.flags |= MAP_FIXED; + if (linux_args.flags & LINUX_MAP_ANON) + bsd_args.flags |= MAP_ANON; + if (linux_args.flags & LINUX_MAP_GROWSDOWN) { + bsd_args.flags |= MAP_STACK; + + /* The linux MAP_GROWSDOWN option does not limit auto + * growth of the region. Linux mmap with this option + * takes as addr the inital BOS, and as len, the initial + * region size. It can then grow down from addr without + * limit. However, linux threads has an implicit internal + * limit to stack size of STACK_SIZE. Its just not + * enforced explicitly in linux. But, here we impose + * a limit of (STACK_SIZE - GUARD_SIZE) on the stack + * region, since we can do this with our mmap. + * + * Our mmap with MAP_STACK takes addr as the maximum + * downsize limit on BOS, and as len the max size of + * the region. It them maps the top SGROWSIZ bytes, + * and autgrows the region down, up to the limit + * in addr. + * + * If we don't use the MAP_STACK option, the effect + * of this code is to allocate a stack region of a + * fixed size of (STACK_SIZE - GUARD_SIZE). + */ + + /* This gives us TOS */ + bsd_args.addr = linux_args.addr + linux_args.len; + + /* This gives us our maximum stack size */ + if (linux_args.len > STACK_SIZE - GUARD_SIZE) + bsd_args.len = linux_args.len; + else + bsd_args.len = STACK_SIZE - GUARD_SIZE; + + /* This gives us a new BOS. If we're using VM_STACK, then + * mmap will just map the top SGROWSIZ bytes, and let + * the stack grow down to the limit at BOS. If we're + * not using VM_STACK we map the full stack, since we + * don't have a way to autogrow it. + */ + bsd_args.addr -= bsd_args.len; + } else { + bsd_args.addr = linux_args.addr; + bsd_args.len = linux_args.len; + } + + bsd_args.prot = linux_args.prot | PROT_READ; /* always required */ + if (linux_args.flags & LINUX_MAP_ANON) + bsd_args.fd = -1; + else + bsd_args.fd = linux_args.fd; + bsd_args.pos = linux_args.pos; + bsd_args.pad = 0; + +#ifdef DEBUG + printf("-> (%p, %d, %d, 0x%08x, %d, %d)\n", (void *)bsd_args.addr, + bsd_args.len, bsd_args.prot, bsd_args.flags, bsd_args.fd, + (int)bsd_args.pos); +#endif + + return (mmap(p, &bsd_args)); +} + +int +linux_pipe(struct proc *p, struct linux_pipe_args *args) +{ + int error; + int reg_edx; + +#ifdef DEBUG + printf("Linux-emul(%ld): pipe(*)\n", (long)p->p_pid); +#endif + + reg_edx = p->p_retval[1]; + error = pipe(p, 0); + if (error) { + p->p_retval[1] = reg_edx; + return (error); + } + + error = copyout(p->p_retval, args->pipefds, 2*sizeof(int)); + if (error) { + p->p_retval[1] = reg_edx; + return (error); + } + + p->p_retval[1] = reg_edx; + p->p_retval[0] = 0; + return (0); +} + +int +linux_ioperm(struct proc *p, struct linux_ioperm_args *args) +{ + struct sysarch_args sa; + struct i386_ioperm_args *iia; + caddr_t sg; + + sg = stackgap_init(); + iia = stackgap_alloc(&sg, sizeof(struct i386_ioperm_args)); + iia->start = args->start; + iia->length = args->length; + iia->enable = args->enable; + sa.op = I386_SET_IOPERM; + sa.parms = (char *)iia; + return (sysarch(p, &sa)); +} + +int +linux_iopl(struct proc *p, struct linux_iopl_args *args) +{ + int error; + + if (args->level < 0 || args->level > 3) + return (EINVAL); + if ((error = suser(p)) != 0) + return (error); + if (securelevel > 0) + return (EPERM); + p->p_md.md_regs->tf_eflags = (p->p_md.md_regs->tf_eflags & ~PSL_IOPL) | + (args->level * (PSL_IOPL / 3)); + return (0); +} + +int +linux_modify_ldt(p, uap) + struct proc *p; + struct linux_modify_ldt_args *uap; +{ + int error; + caddr_t sg; + struct sysarch_args args; + struct i386_ldt_args *ldt; + struct linux_descriptor ld; + union descriptor *desc; + + sg = stackgap_init(); + + if (uap->ptr == NULL) + return (EINVAL); + + switch (uap->func) { + case 0x00: /* read_ldt */ + ldt = stackgap_alloc(&sg, sizeof(*ldt)); + ldt->start = 0; + ldt->descs = uap->ptr; + ldt->num = uap->bytecount / sizeof(union descriptor); + args.op = I386_GET_LDT; + args.parms = (char*)ldt; + error = sysarch(p, &args); + p->p_retval[0] *= sizeof(union descriptor); + break; + case 0x01: /* write_ldt */ + case 0x11: /* write_ldt */ + if (uap->bytecount != sizeof(ld)) + return (EINVAL); + + error = copyin(uap->ptr, &ld, sizeof(ld)); + if (error) + return (error); + + ldt = stackgap_alloc(&sg, sizeof(*ldt)); + desc = stackgap_alloc(&sg, sizeof(*desc)); + ldt->start = ld.entry_number; + ldt->descs = desc; + ldt->num = 1; + desc->sd.sd_lolimit = (ld.limit & 0x0000ffff); + desc->sd.sd_hilimit = (ld.limit & 0x000f0000) >> 16; + desc->sd.sd_lobase = (ld.base_addr & 0x00ffffff); + desc->sd.sd_hibase = (ld.base_addr & 0xff000000) >> 24; + desc->sd.sd_type = SDT_MEMRO | ((ld.read_exec_only ^ 1) << 1) | + (ld.contents << 2); + desc->sd.sd_dpl = 3; + desc->sd.sd_p = (ld.seg_not_present ^ 1); + desc->sd.sd_xx = 0; + desc->sd.sd_def32 = ld.seg_32bit; + desc->sd.sd_gran = ld.limit_in_pages; + args.op = I386_SET_LDT; + args.parms = (char*)ldt; + error = sysarch(p, &args); + break; + default: + error = EINVAL; + break; + } + + if (error == EOPNOTSUPP) { + printf("linux: modify_ldt needs kernel option USER_LDT\n"); + error = ENOSYS; + } + + return (error); +} + +int +linux_sigaction(struct proc *p, struct linux_sigaction_args *args) +{ + linux_osigaction_t osa; + linux_sigaction_t act, oact; + int error; + +#ifdef DEBUG + printf("Linux-emul(%ld): sigaction(%d, %p, %p)\n", (long)p->p_pid, + args->sig, (void *)args->nsa, (void *)args->osa); +#endif + + if (args->nsa != NULL) { + error = copyin(args->nsa, &osa, sizeof(linux_osigaction_t)); + if (error) + return (error); + act.lsa_handler = osa.lsa_handler; + act.lsa_flags = osa.lsa_flags; + act.lsa_restorer = osa.lsa_restorer; + LINUX_SIGEMPTYSET(act.lsa_mask); + act.lsa_mask.__bits[0] = osa.lsa_mask; + } + + error = linux_do_sigaction(p, args->sig, args->nsa ? &act : NULL, + args->osa ? &oact : NULL); + + if (args->osa != NULL && !error) { + osa.lsa_handler = oact.lsa_handler; + osa.lsa_flags = oact.lsa_flags; + osa.lsa_restorer = oact.lsa_restorer; + osa.lsa_mask = oact.lsa_mask.__bits[0]; + error = copyout(&osa, args->osa, sizeof(linux_osigaction_t)); + } + + return (error); +} + +/* + * Linux has two extra args, restart and oldmask. We dont use these, + * but it seems that "restart" is actually a context pointer that + * enables the signal to happen with a different register set. + */ +int +linux_sigsuspend(struct proc *p, struct linux_sigsuspend_args *args) +{ + struct sigsuspend_args bsd; + sigset_t *sigmask; + linux_sigset_t mask; + caddr_t sg = stackgap_init(); + +#ifdef DEBUG + printf("Linux-emul(%ld): sigsuspend(%08lx)\n", + (long)p->p_pid, (unsigned long)args->mask); +#endif + + sigmask = stackgap_alloc(&sg, sizeof(sigset_t)); + LINUX_SIGEMPTYSET(mask); + mask.__bits[0] = args->mask; + linux_to_bsd_sigset(&mask, sigmask); + bsd.sigmask = sigmask; + return (sigsuspend(p, &bsd)); +} + +int +linux_rt_sigsuspend(p, uap) + struct proc *p; + struct linux_rt_sigsuspend_args *uap; +{ + linux_sigset_t lmask; + sigset_t *bmask; + struct sigsuspend_args bsd; + caddr_t sg = stackgap_init(); + int error; + +#ifdef DEBUG + printf("Linux-emul(%ld): rt_sigsuspend(%p, %d)\n", (long)p->p_pid, + (void *)uap->newset, uap->sigsetsize); +#endif + + if (uap->sigsetsize != sizeof(linux_sigset_t)) + return (EINVAL); + + error = copyin(uap->newset, &lmask, sizeof(linux_sigset_t)); + if (error) + return (error); + + bmask = stackgap_alloc(&sg, sizeof(sigset_t)); + linux_to_bsd_sigset(&lmask, bmask); + bsd.sigmask = bmask; + return (sigsuspend(p, &bsd)); +} + +int +linux_pause(struct proc *p, struct linux_pause_args *args) +{ + struct sigsuspend_args bsd; + sigset_t *sigmask; + caddr_t sg = stackgap_init(); + +#ifdef DEBUG + printf("Linux-emul(%d): pause()\n", p->p_pid); +#endif + + sigmask = stackgap_alloc(&sg, sizeof(sigset_t)); + *sigmask = p->p_sigmask; + bsd.sigmask = sigmask; + return (sigsuspend(p, &bsd)); +} + +int +linux_sigaltstack(p, uap) + struct proc *p; + struct linux_sigaltstack_args *uap; +{ + struct sigaltstack_args bsd; + stack_t *ss, *oss; + linux_stack_t lss; + int error; + caddr_t sg = stackgap_init(); + +#ifdef DEBUG + printf("Linux-emul(%ld): sigaltstack(%p, %p)\n", + (long)p->p_pid, uap->uss, uap->uoss); +#endif + + error = copyin(uap->uss, &lss, sizeof(linux_stack_t)); + if (error) + return (error); + + ss = stackgap_alloc(&sg, sizeof(stack_t)); + ss->ss_sp = lss.ss_sp; + ss->ss_size = lss.ss_size; + ss->ss_flags = lss.ss_flags; + + oss = (uap->uoss != NULL) + ? stackgap_alloc(&sg, sizeof(stack_t)) + : NULL; + + bsd.ss = ss; + bsd.oss = oss; + error = sigaltstack(p, &bsd); + + if (!error && oss != NULL) { + lss.ss_sp = oss->ss_sp; + lss.ss_size = oss->ss_size; + lss.ss_flags = oss->ss_flags; + error = copyout(&lss, uap->uoss, sizeof(linux_stack_t)); + } + + return (error); +}