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.

1 files changed, 634 insertions, 0 deletions

diff --git a/sys/alpha/linux/linux_machdep.c b/sys/alpha/linux/linux_machdep.c
new file mode 100644
index 0000000..99b7ffd
--- /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 <sys/param.h>
+#include <sys/mman.h>
+#include <sys/proc.h>
+#include <sys/sysproto.h>
+#include <sys/systm.h>
+#include <sys/unistd.h>
+
+#include <machine/frame.h>
+#include <machine/psl.h>
+#include <machine/segments.h>
+#include <machine/sysarch.h>
+
+#include <i386/linux/linux.h>
+#include <i386/linux/linux_proto.h>
+#include <compat/linux/linux_ipc.h>
+#include <compat/linux/linux_signal.h>
+#include <compat/linux/linux_util.h>
+
+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);
+}