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NetBSD/sys/compat/sparc32/sparc32_exec.c

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/* $NetBSD: sparc32_exec.c,v 1.12 1998/12/18 15:08:21 drochner Exp $ */
/* from: NetBSD: exec_aout.c,v 1.15 1996/09/26 23:34:46 cgd Exp */
/*
* Copyright (c) 1998 Matthew R. Green.
* Copyright (c) 1993, 1994 Christopher G. Demetriou
* 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.
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Christopher G. Demetriou.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without 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.
*/
#include "opt_compat_sunos.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/malloc.h>
#include <sys/vnode.h>
#include <sys/exec.h>
#include <sys/resourcevar.h>
#include <sys/signal.h>
#include <sys/signalvar.h>
#include <vm/vm.h>
#include <compat/sparc32/sparc32.h>
#include <compat/sparc32/sparc32_exec.h>
#include <compat/sparc32/sparc32_syscall.h>
#include <machine/frame.h>
const char sparc32_emul_path[] = "/emul/sparc32";
extern char sparc32_sigcode[], sparc32_esigcode[];
extern struct sysent sparc32_sysent[];
#ifdef SYSCALL_DEBUG
extern char *sparc32_syscallnames[];
#endif
void sparc32_sendsig __P((sig_t, int, int, u_long));
void sparc32_setregs __P((struct proc *, struct exec_package *, u_long));
void *sparc32_copyargs __P((struct exec_package *, struct ps_strings *,
void *, void *));
int sparc32_copyinargs __P((struct ps_strings *, void *, size_t,
const void *, const void *));
static int sparc32_exec_aout_prep_zmagic __P((struct proc *,
struct exec_package *));
static int sparc32_exec_aout_prep_nmagic __P((struct proc *,
struct exec_package *));
static int sparc32_exec_aout_prep_omagic __P((struct proc *,
struct exec_package *));
struct emul emul_sparc32 = {
"sparc32",
NULL,
sparc32_sendsig, /* XXX needs to be written */
sparc32_SYS_syscall,
sparc32_SYS_MAXSYSCALL,
sparc32_sysent,
#ifdef SYSCALL_DEBUG
sparc32_syscallnames,
#else
NULL,
#endif
0,
sparc32_copyinargs,
sparc32_copyargs,
sparc32_setregs, /* XXX needs to be written?? */
sparc32_sigcode,
sparc32_esigcode,
};
/*
* exec_sparc32_makecmds(): Check if it's an sparc32 a.out format
* executable.
*
* Given a proc pointer and an exec package pointer, see if the referent
* of the epp is in sparc32 a.out format. Check 'standard' magic
* numbers for this architecture.
*
* This function, in the former case, or the hook, in the latter, is
* responsible for creating a set of vmcmds which can be used to build
* the process's vm space and inserting them into the exec package.
*/
int
exec_sparc32_makecmds(p, epp)
struct proc *p;
struct exec_package *epp;
{
sparc32_u_long midmag, magic;
u_short mid;
int error;
struct sparc32_exec *execp = epp->ep_hdr;
if (epp->ep_hdrvalid < sizeof(struct sparc32_exec))
return ENOEXEC;
midmag = (sparc32_u_long)ntohl(execp->a_midmag);
mid = (midmag >> 16) & 0x3ff;
magic = midmag & 0xffff;
midmag = mid << 16 | magic;
switch (midmag) {
case (MID_SPARC << 16) | ZMAGIC:
error = sparc32_exec_aout_prep_zmagic(p, epp);
break;
case (MID_SPARC << 16) | NMAGIC:
error = sparc32_exec_aout_prep_nmagic(p, epp);
break;
case (MID_SPARC << 16) | OMAGIC:
error = sparc32_exec_aout_prep_omagic(p, epp);
break;
default:
/* Invalid magic */
error = ENOEXEC;
break;
}
if (error == 0) {
/* set up our emulation information */
epp->ep_emul = &emul_sparc32;
} else
kill_vmcmds(&epp->ep_vmcmds);
return error;
}
/*
* sparc32_exec_aout_prep_zmagic(): Prepare a 'native' ZMAGIC binary's
* exec package
*
* First, set of the various offsets/lengths in the exec package.
*
* Then, mark the text image busy (so it can be demand paged) or error
* out if this is not possible. Finally, set up vmcmds for the
* text, data, bss, and stack segments.
*/
int
sparc32_exec_aout_prep_zmagic(p, epp)
struct proc *p;
struct exec_package *epp;
{
struct sparc32_exec *execp = epp->ep_hdr;
epp->ep_taddr = USRTEXT;
epp->ep_tsize = execp->a_text;
epp->ep_daddr = epp->ep_taddr + execp->a_text;
epp->ep_dsize = execp->a_data + execp->a_bss;
epp->ep_entry = execp->a_entry;
/*
* check if vnode is in open for writing, because we want to
* demand-page out of it. if it is, don't do it, for various
* reasons
*/
if ((execp->a_text != 0 || execp->a_data != 0) &&
epp->ep_vp->v_writecount != 0) {
#ifdef DIAGNOSTIC
if (epp->ep_vp->v_flag & VTEXT)
panic("exec: a VTEXT vnode has writecount != 0\n");
#endif
return ETXTBSY;
}
epp->ep_vp->v_flag |= VTEXT;
/* set up command for text segment */
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_text,
epp->ep_taddr, epp->ep_vp, 0, VM_PROT_READ|VM_PROT_EXECUTE);
/* set up command for data segment */
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_data,
epp->ep_daddr, epp->ep_vp, execp->a_text,
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
/* set up command for bss segment */
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, execp->a_bss,
epp->ep_daddr + execp->a_data, NULLVP, 0,
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
return exec_aout_setup_stack(p, epp);
}
/*
* sparc32_exec_aout_prep_nmagic(): Prepare a 'native' NMAGIC binary's
* exec package
*/
int
sparc32_exec_aout_prep_nmagic(p, epp)
struct proc *p;
struct exec_package *epp;
{
struct sparc32_exec *execp = epp->ep_hdr;
long bsize, baddr;
epp->ep_taddr = USRTEXT;
epp->ep_tsize = execp->a_text;
epp->ep_daddr = roundup(epp->ep_taddr + execp->a_text, __LDPGSZ);
epp->ep_dsize = execp->a_data + execp->a_bss;
epp->ep_entry = execp->a_entry;
/* set up command for text segment */
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_text,
epp->ep_taddr, epp->ep_vp, sizeof(struct exec),
VM_PROT_READ|VM_PROT_EXECUTE);
/* set up command for data segment */
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_data,
epp->ep_daddr, epp->ep_vp, execp->a_text + sizeof(struct exec),
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
/* set up command for bss segment */
baddr = roundup(epp->ep_daddr + execp->a_data, NBPG);
bsize = epp->ep_daddr + epp->ep_dsize - baddr;
if (bsize > 0)
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr,
NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
return exec_aout_setup_stack(p, epp);
}
/*
* sparc32_exec_aout_prep_omagic(): Prepare a 'native' OMAGIC binary's
* exec package
*/
int
sparc32_exec_aout_prep_omagic(p, epp)
struct proc *p;
struct exec_package *epp;
{
struct sparc32_exec *execp = epp->ep_hdr;
long dsize, bsize, baddr;
epp->ep_taddr = USRTEXT;
epp->ep_tsize = execp->a_text;
epp->ep_daddr = epp->ep_taddr + execp->a_text;
epp->ep_dsize = execp->a_data + execp->a_bss;
epp->ep_entry = execp->a_entry;
/* set up command for text and data segments */
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn,
execp->a_text + execp->a_data, epp->ep_taddr, epp->ep_vp,
sizeof(struct exec), VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
/* set up command for bss segment */
baddr = roundup(epp->ep_daddr + execp->a_data, NBPG);
bsize = epp->ep_daddr + epp->ep_dsize - baddr;
if (bsize > 0)
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr,
NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
/*
* Make sure (# of pages) mapped above equals (vm_tsize + vm_dsize);
* obreak(2) relies on this fact. Both `vm_tsize' and `vm_dsize' are
* computed (in execve(2)) by rounding *up* `ep_tsize' and `ep_dsize'
* respectively to page boundaries.
* Compensate `ep_dsize' for the amount of data covered by the last
* text page.
*/
dsize = epp->ep_dsize + execp->a_text - roundup(execp->a_text, NBPG);
epp->ep_dsize = (dsize > 0) ? dsize : 0;
return exec_aout_setup_stack(p, epp);
}
/* XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX */
/*
* the rest is pretty much verbatum from sys/arch/sparc/sparc64/machdep.c
*/
/* XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX */
/*
* Set up registers on exec.
*
* XXX this entire mess must be fixed
*/
/* ARGSUSED */
void
sparc32_setregs(p, pack, stack)
struct proc *p;
struct exec_package *pack;
u_long stack; /* XXX */
{
register struct trapframe *tf = p->p_md.md_tf;
register struct fpstate *fs;
register int64_t tstate;
/* Don't allow misaligned code by default */
p->p_md.md_flags &= ~MDP_FIXALIGN;
/*
* Set the registers to 0 except for:
* %o6: stack pointer, built in exec())
* %tstate: (retain icc and xcc and cwp bits)
* %g1: address of PS_STRINGS (used by crt0)
* %tpc,%tnpc: entry point of program
*/
tstate = ((PSTATE_USER)<<TSTATE_PSTATE_SHIFT)
| (tf->tf_tstate & TSTATE_CWP);
if ((fs = p->p_md.md_fpstate) != NULL) {
/*
* We hold an FPU state. If we own *the* FPU chip state
* we must get rid of it, and the only way to do that is
* to save it. In any case, get rid of our FPU state.
*/
if (p == fpproc) {
savefpstate(fs);
fpproc = NULL;
}
free((void *)fs, M_SUBPROC);
p->p_md.md_fpstate = NULL;
}
bzero((caddr_t)tf, sizeof *tf);
tf->tf_tstate = tstate;
tf->tf_global[1] = (int)PS_STRINGS;
tf->tf_pc = pack->ep_entry & ~3;
tf->tf_npc = tf->tf_pc + 4;
stack -= sizeof(struct rwindow32);
tf->tf_out[6] = stack;
tf->tf_out[7] = NULL;
}
/*
* NB: since this is a 32-bit address world, sf_scp and sf_sc
* can't be a pointer since those are 64-bits wide.
*/
struct sparc32_sigframe {
int sf_signo; /* signal number */
int sf_code; /* code */
u_int sf_scp; /* SunOS user addr of sigcontext */
int sf_addr; /* SunOS compat, always 0 for now */
struct sparc32_sigcontext sf_sc; /* actual sigcontext */
};
#undef DEBUG
#ifdef DEBUG
extern int sigdebug;
#endif
void
sparc32_sendsig(catcher, sig, mask, code)
sig_t catcher;
int sig, mask;
u_long code;
{
register struct proc *p = curproc;
register struct sigacts *psp = p->p_sigacts;
register struct sparc32_sigframe *fp;
register struct trapframe *tf;
register int addr, onstack;
struct rwindow32 *kwin, *oldsp, *newsp;
struct sparc32_sigframe sf;
extern char sigcode[], esigcode[];
#define szsigcode (esigcode - sigcode)
tf = p->p_md.md_tf;
/* Need to attempt to zero extend this 32-bit pointer */
oldsp = (struct rwindow32 *)(u_long)(u_int)tf->tf_out[6];
/* Do we need to jump onto the signal stack? */
onstack =
(psp->ps_sigstk.ss_flags & (SS_DISABLE | SS_ONSTACK)) == 0 &&
(psp->ps_sigact[sig].sa_flags & SA_ONSTACK) != 0;
if (onstack) {
fp = (struct sparc32_sigframe *)(psp->ps_sigstk.ss_sp +
psp->ps_sigstk.ss_size);
psp->ps_sigstk.ss_flags |= SS_ONSTACK;
} else
fp = (struct sparc32_sigframe *)oldsp;
fp = (struct sparc32_sigframe *)((long)(fp - 1) & ~7);
#ifdef DEBUG
sigpid = p->p_pid;
if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) {
printf("sendsig: %s[%d] sig %d newusp %p scp %p oldsp %p\n",
p->p_comm, p->p_pid, sig, fp, &fp->sf_sc, oldsp);
if (sigdebug & SDB_DDB) Debugger();
}
#endif
/*
* Now set up the signal frame. We build it in kernel space
* and then copy it out. We probably ought to just build it
* directly in user space....
*/
sf.sf_signo = sig;
sf.sf_code = code;
#ifdef COMPAT_SUNOS
sf.sf_scp = (u_long)&fp->sf_sc;
#endif
sf.sf_addr = 0; /* XXX */
/*
* Build the signal context to be used by sigreturn.
*/
sf.sf_sc.sc_onstack = onstack;
sf.sf_sc.sc_mask = mask;
sf.sf_sc.sc_sp = (long)oldsp;
sf.sf_sc.sc_pc = tf->tf_pc;
sf.sf_sc.sc_npc = tf->tf_npc;
sf.sf_sc.sc_psr = TSTATECCR_TO_PSR(tf->tf_tstate); /* XXX */
sf.sf_sc.sc_g1 = tf->tf_global[1];
sf.sf_sc.sc_o0 = tf->tf_out[0];
/*
* Put the stack in a consistent state before we whack away
* at it. Note that write_user_windows may just dump the
* registers into the pcb; we need them in the process's memory.
* We also need to make sure that when we start the signal handler,
* its %i6 (%fp), which is loaded from the newly allocated stack area,
* joins seamlessly with the frame it was in when the signal occurred,
* so that the debugger and _longjmp code can back up through it.
*/
newsp = (struct rwindow32 *)((long)fp - sizeof(struct rwindow32));
write_user_windows();
#ifdef DEBUG
if ((sigdebug & SDB_KSTACK))
printf("sendsig: saving sf to %p, setting stack pointer %p to %p\n",
fp, &(((union rwindow *)newsp)->v8.rw_in[6]), oldsp);
#endif
kwin = (struct rwindow32 *)(((caddr_t)tf)-CCFSZ);
if (rwindow_save(p) ||
copyout((caddr_t)&sf, (caddr_t)fp, sizeof sf) ||
suword(&(((union rwindow *)newsp)->v8.rw_in[6]), (u_long)oldsp)) {
/*
* Process has trashed its stack; give it an illegal
* instruction to halt it in its tracks.
*/
#ifdef DEBUG
if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid)
printf("sendsig: window save or copyout error\n");
printf("sendsig: stack was trashed trying to send sig %d, sending SIGILL\n", sig);
if (sigdebug & SDB_DDB) Debugger();
#endif
sigexit(p, SIGILL);
/* NOTREACHED */
}
#ifdef DEBUG
if (sigdebug & SDB_FOLLOW) {
printf("sendsig: %s[%d] sig %d scp %p\n",
p->p_comm, p->p_pid, sig, &fp->sf_sc);
}
#endif
/*
* Arrange to continue execution at the code copied out in exec().
* It needs the function to call in %g1, and a new stack pointer.
*/
addr = (long)PS_STRINGS - szsigcode;
tf->tf_global[1] = (long)catcher;
tf->tf_pc = addr;
tf->tf_npc = addr + 4;
tf->tf_out[6] = (u_int64_t)(u_int)(u_long)newsp;
/* Remember that we're now on the signal stack. */
if (onstack)
psp->ps_sigstk.ss_flags |= SS_ONSTACK;
#ifdef DEBUG
if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) {
printf("sendsig: about to return to catcher %p thru %p\n",
catcher, addr);
if (sigdebug & SDB_DDB) Debugger();
}
#endif
}
/*
* We need to copy out all pointers as 32-bit values.
*/
void *
sparc32_copyargs(pack, arginfo, stack, argp)
struct exec_package *pack;
struct ps_strings *arginfo;
void *stack;
void *argp;
{
u_int32_t *cpp = stack;
u_int32_t dp;
u_int32_t nullp = 0;
char *sp;
size_t len;
int argc = arginfo->ps_nargvstr;
int envc = arginfo->ps_nenvstr;
if (copyout(&argc, cpp++, sizeof(argc)))
return NULL;
dp = (u_long) (cpp + argc + envc + 2 + pack->ep_emul->e_arglen);
sp = argp;
/* XXX don't copy them out, remap them! */
arginfo->ps_argvstr = (caddr_t)(u_long)cpp; /* remember location of argv for later */
for (; --argc >= 0; sp += len, dp += len)
if (copyout(&dp, cpp++, sizeof(dp)) ||
copyoutstr(sp, (char *)(u_long)dp, ARG_MAX, &len))
return NULL;
if (copyout(&nullp, cpp++, sizeof(nullp)))
return NULL;
arginfo->ps_envstr = (caddr_t)(u_long)cpp; /* remember location of envp for later */
for (; --envc >= 0; sp += len, dp += len)
if (copyout(&dp, cpp++, sizeof(dp)) ||
copyoutstr(sp, (char *)(u_long)dp, ARG_MAX, &len))
return NULL;
if (copyout(&nullp, cpp++, sizeof(nullp)))
return NULL;
return cpp;
}
/*
* Copy in args and env passed in by the exec syscall.
*
* Since this is a 32-bit emulation, pointers are 32-bits wide so this
* routine needs to copyin 32-bit pointers and convert them.
*/
int
sparc32_copyinargs(arginfo, destp, len, argp, envp)
struct ps_strings *arginfo;
void *destp;
size_t len;
const void *argp;
const void *envp;
{
char * const *cpp;
char *dp;
u_int32_t sp;
long argc, envc;
size_t l;
int error = 0;
dp = *(char **)destp;
argc = 0;
if ((cpp = argp) == NULL)
return EINVAL;
while (1) {
l = len;
if ((error = copyin(cpp, &sp, sizeof(sp))) != 0)
return (error);
if (!sp)
break;
if ((error = copyinstr((char *)(u_long)sp, dp, l, &l)) != 0) {
if (error == ENAMETOOLONG)
error = E2BIG;
return (error);
}
dp += l;
len -= l;
cpp++;
argc++;
}
envc = 0;
/* environment need not be there */
if ((cpp = envp) != NULL ) {
while (1) {
l = len;
if ((error = copyin(cpp, &sp, sizeof(sp))) != 0)
return (error);
if (!sp)
break;
if ((error = copyinstr((char *)(u_long)sp, dp, l, &l)) != 0) {
if (error == ENAMETOOLONG)
error = E2BIG;
return (error);
}
dp += l;
len -= l;
cpp++;
envc++;
}
}
/* adjust "active stack depth" for process VSZ */
*(char**)destp = dp;
arginfo->ps_nargvstr = argc;
arginfo->ps_nenvstr = envc;
return (error);
}
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