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NetBSD/sys/compat/irix/irix_signal.c

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/* $NetBSD: irix_signal.c,v 1.46 2007/12/20 23:02:51 dsl Exp $ */
/*-
* Copyright (c) 1994, 2001-2002 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Christos Zoulas and Emmanuel Dreyfus.
*
* 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 the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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 <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: irix_signal.c,v 1.46 2007/12/20 23:02:51 dsl Exp $");
#include <sys/types.h>
#include <sys/signal.h>
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/pool.h>
#include <sys/ptrace.h>
#include <sys/proc.h>
#include <sys/resourcevar.h>
#include <sys/systm.h>
#include <sys/vnode.h>
#include <sys/wait.h>
#include <sys/user.h>
#include <machine/regnum.h>
#include <machine/trap.h>
#include <compat/common/compat_util.h>
#include <compat/svr4/svr4_types.h>
#include <compat/svr4/svr4_wait.h>
#include <compat/svr4/svr4_signal.h>
#include <compat/svr4/svr4_lwp.h>
#include <compat/svr4/svr4_ucontext.h>
#include <compat/svr4/svr4_syscallargs.h>
#include <compat/irix/irix_signal.h>
#include <compat/irix/irix_errno.h>
#include <compat/irix/irix_exec.h>
#include <compat/irix/irix_syscallargs.h>
extern const int native_to_svr4_signo[];
extern const int svr4_to_native_signo[];
static int irix_wait_siginfo(int, struct rusage *, int,
struct irix_irix5_siginfo *);
static void irix_signal_siginfo(struct irix_irix5_siginfo *,
int, u_long, void *);
static void irix_set_ucontext(struct irix_ucontext*, const sigset_t *,
int, struct lwp *);
static void irix_set_sigcontext(struct irix_sigcontext*, const sigset_t *,
int, struct lwp *);
static void irix_get_ucontext(struct irix_ucontext*, struct lwp *);
static void irix_get_sigcontext(struct irix_sigcontext*, struct lwp *);
#define irix_sigmask(n) (1 << (((n) - 1) & 31))
#define irix_sigword(n) (((n) - 1) >> 5)
#define irix_sigemptyset(s) memset((s), 0, sizeof(*(s)))
#define irix_sigismember(s, n) ((s)->bits[irix_sigword(n)] & irix_sigmask(n))
#define irix_sigaddset(s, n) ((s)->bits[irix_sigword(n)] |= irix_sigmask(n))
/*
* Build a struct siginfo wor waitsys/waitid
* This is ripped from svr4_setinfo. See irix_sys_waitsys...
*/
static int
irix_wait_siginfo(int pid, struct rusage *ru, int st, struct irix_irix5_siginfo *s)
{
struct irix_irix5_siginfo i;
int sig;
memset(&i, 0, sizeof(i));
i.isi_signo = SVR4_SIGCHLD;
i.isi_errno = 0; /* XXX? */
i.isi_pid = pid;
if (pid != 0) {
i.isi_stime = ru->ru_stime.tv_sec;
i.isi_utime = ru->ru_utime.tv_sec;
}
if (WIFEXITED(st)) {
i.isi_status = WEXITSTATUS(st);
i.isi_code = SVR4_CLD_EXITED;
} else if (WIFSTOPPED(st)) {
sig = WSTOPSIG(st);
if (sig >= 0 && sig < NSIG)
i.isi_status = native_to_svr4_signo[sig];
if (i.isi_status == SVR4_SIGCONT)
i.isi_code = SVR4_CLD_CONTINUED;
else
i.isi_code = SVR4_CLD_STOPPED;
} else {
sig = WTERMSIG(st);
if (sig >= 0 && sig < NSIG)
i.isi_status = native_to_svr4_signo[sig];
if (WCOREDUMP(st))
i.isi_code = SVR4_CLD_DUMPED;
else
i.isi_code = SVR4_CLD_KILLED;
}
return copyout(&i, s, sizeof(i));
}
/*
* Build a struct siginfo for signal delivery
*/
static void
irix_signal_siginfo(struct irix_irix5_siginfo *isi, int sig, u_long code, void *addr)
{
if (sig < 0 || sig >= SVR4_NSIG) {
isi->isi_errno = IRIX_EINVAL;
return;
}
isi->isi_signo = native_to_svr4_signo[sig];
isi->isi_errno = 0;
isi->isi_addr = (irix_app32_ptr_t)addr;
switch (code) {
case T_TLB_MOD:
case T_TLB_LD_MISS:
case T_TLB_ST_MISS:
switch (sig) {
case SIGSEGV:
isi->isi_code = IRIX_SEGV_MAPERR;
isi->isi_errno = IRIX_EFAULT;
break;
case SIGBUS:
isi->isi_code = IRIX_BUS_ADRERR;
isi->isi_errno = IRIX_EACCES;
break;
case SIGKILL:
isi->isi_code = IRIX_SEGV_MAPERR;
isi->isi_errno = IRIX_ENOMEM;
break;
default:
isi->isi_code = 0;
}
break;
case T_ADDR_ERR_LD:
case T_ADDR_ERR_ST:
case T_BUS_ERR_IFETCH:
case T_BUS_ERR_LD_ST:
/* NetBSD issues a SIGSEGV here, IRIX rather uses SIGBUS */
isi->isi_code = IRIX_SEGV_MAPERR;
isi->isi_errno = IRIX_EFAULT;
break;
case T_BREAK:
isi->isi_code = IRIX_TRAP_BRKPT;
break;
case T_RES_INST:
case T_COP_UNUSABLE:
/* NetBSD issues SIGSEGV here, IRIX rather uses SIGILL */
isi->isi_code = IRIX_SEGV_MAPERR;
isi->isi_errno = IRIX_EFAULT;
break;
case T_OVFLOW:
isi->isi_errno = IRIX_EOVERFLOW;
case T_TRAP:
isi->isi_code = IRIX_FPE_INTOVF;
break;
case T_FPE:
isi->isi_code = IRIX_FPE_FLTINV;
break;
case T_WATCH:
case T_VCEI:
case T_VCED:
case T_INT:
case T_SYSCALL:
default:
isi->isi_code = 0;
#ifdef DEBUG_IRIX
printf("irix_signal_siginfo: sig %d code %ld\n", sig, code);
#endif
break;
}
}
void
native_to_irix_sigset(const sigset_t *bss, irix_sigset_t *sss)
{
int i, newsig;
irix_sigemptyset(sss);
for (i = 1; i < NSIG; i++) {
if (sigismember(bss, i)) {
newsig = native_to_svr4_signo[i];
if (newsig)
irix_sigaddset(sss, newsig);
}
}
}
void
irix_to_native_sigset(const irix_sigset_t *sss, sigset_t *bss)
{
int i, newsig;
sigemptyset(bss);
for (i = 1; i < SVR4_NSIG; i++) {
if (irix_sigismember(sss, i)) {
newsig = svr4_to_native_signo[i];
if (newsig)
sigaddset(bss, newsig);
}
}
}
void
irix_sendsig(const ksiginfo_t *ksi, const sigset_t *mask)
{
struct lwp *l = curlwp;
struct proc *p = l->l_proc;
void *sp;
struct frame *f;
int onstack;
int error;
sig_t catcher = SIGACTION(p, ksi->ksi_signo).sa_handler;
struct irix_sigframe sf;
f = (struct frame *)l->l_md.md_regs;
#ifdef DEBUG_IRIX
printf("irix_sendsig()\n");
printf("catcher = %p, sig = %d, code = 0x%x\n",
(void *)catcher, ksi->ksi_signo, ksi->ksi_trap);
printf("irix_sendsig(): starting [PC=%p SP=%p SR=0x%08lx]\n",
(void *)f->f_regs[_R_PC], (void *)f->f_regs[_R_SP],
f->f_regs[_R_SR]);
#endif /* DEBUG_IRIX */
/*
* Do we need to jump onto the signal stack?
*/
onstack =
(l->l_sigstk.ss_flags & (SS_DISABLE | SS_ONSTACK)) == 0
&& (SIGACTION(p, ksi->ksi_signo).sa_flags & SA_ONSTACK) != 0;
#ifdef DEBUG_IRIX
if (onstack)
printf("irix_sendsig: using signal stack\n");
#endif
/*
* Allocate space for the signal handler context.
*/
if (onstack)
sp = (void *)((char *)l->l_sigstk.ss_sp
+ l->l_sigstk.ss_size);
else
/* cast for _MIPS_BSD_API == _MIPS_BSD_API_LP32_64CLEAN case */
sp = (void *)(u_int32_t)f->f_regs[_R_SP];
/*
* Build the signal frame
*/
bzero(&sf, sizeof(sf));
if (SIGACTION(p, ksi->ksi_signo).sa_flags & SA_SIGINFO) {
irix_set_ucontext(&sf.isf_ctx.iss.iuc, mask, ksi->ksi_trap, l);
irix_signal_siginfo(&sf.isf_ctx.iss.iis, ksi->ksi_signo,
ksi->ksi_trap, (void *)f->f_regs[_R_BADVADDR]);
} else {
irix_set_sigcontext(&sf.isf_ctx.isc, mask, ksi->ksi_trap, l);
}
/*
* Compute the new stack address after copying sigframe
*/
sp = (void *)((unsigned long)sp - sizeof(sf.isf_ctx));
sp = (void *)((unsigned long)sp & ~0xfUL); /* 16 bytes alignement */
/*
* Install the sigframe onto the stack
*/
sendsig_reset(l, ksi->ksi_signo);
mutex_exit(&p->p_smutex);
error = copyout(&sf.isf_ctx, sp, sizeof(sf.isf_ctx));
mutex_enter(&p->p_smutex);
if (error != 0) {
/*
* Process has trashed its stack; give it an illegal
* instruction to halt it in its tracks.
*/
#ifdef DEBUG_IRIX
printf("irix_sendsig: stack trashed\n");
#endif /* DEBUG_IRIX */
sigexit(l, SIGILL);
/* NOTREACHED */
}
/*
* Set up signal trampoline arguments.
*/
f->f_regs[_R_A0] = native_to_svr4_signo[ksi->ksi_signo];/* signo */
f->f_regs[_R_A1] = 0; /* NULL */
f->f_regs[_R_A2] = (unsigned long)sp; /* ucontext/sigcontext */
f->f_regs[_R_A3] = (unsigned long)catcher;/* signal handler address */
/*
* When siginfo is selected, the higher bit of A0 is set
* This is how the signal trampoline is able to discover if A2
* points to a struct irix_sigcontext or struct irix_ucontext.
* Also, A1 points to struct siginfo instead of being NULL.
*/
if (SIGACTION(p, ksi->ksi_signo).sa_flags & SA_SIGINFO) {
f->f_regs[_R_A0] |= 0x80000000;
f->f_regs[_R_A1] = (u_long)sp +
((u_long)&sf.isf_ctx.iss.iis - (u_long)&sf);
}
/*
* Set up the new stack pointer
*/
f->f_regs[_R_SP] = (unsigned long)sp;
#ifdef DEBUG_IRIX
printf("stack pointer at %p, A1 = %p\n", sp, (void *)f->f_regs[_R_A1]);
#endif /* DEBUG_IRIX */
/*
* Set up the registers to jump to the signal trampoline
* on return to userland.
* see irix_sys_sigaction for details about how we get
* the signal trampoline address.
*/
f->f_regs[_R_PC] = (unsigned long)
(((struct irix_emuldata *)(p->p_emuldata))->ied_sigtramp[ksi->ksi_signo]);
/*
* Remember that we're now on the signal stack.
*/
if (onstack)
l->l_sigstk.ss_flags |= SS_ONSTACK;
#ifdef DEBUG_IRIX
printf("returning from irix_sendsig()\n");
#endif
return;
}
static void
irix_set_sigcontext (scp, mask, code, l)
struct irix_sigcontext *scp;
const sigset_t *mask;
int code;
struct lwp *l;
{
int i;
struct frame *f;
KASSERT(mutex_owned(&l->l_proc->p_smutex));
#ifdef DEBUG_IRIX
printf("irix_set_sigcontext()\n");
#endif
f = (struct frame *)l->l_md.md_regs;
/*
* Build stack frame for signal trampoline.
*/
native_to_irix_sigset(mask, &scp->isc_sigset);
for (i = 1; i < 32; i++) { /* save gpr1 - gpr31 */
scp->isc_regs[i] = f->f_regs[i];
}
scp->isc_regs[0] = 0;
scp->isc_fp_rounded_result = 0;
scp->isc_regmask = ~0x1UL;
scp->isc_mdhi = f->f_regs[_R_MULHI];
scp->isc_mdlo = f->f_regs[_R_MULLO];
scp->isc_pc = f->f_regs[_R_PC];
scp->isc_badvaddr = f->f_regs[_R_BADVADDR];
scp->isc_cause = f->f_regs[_R_CAUSE];
/*
* Save the floating-pointstate, if necessary, then copy it.
*/
#ifndef SOFTFLOAT
scp->isc_ownedfp = l->l_md.md_flags & MDP_FPUSED;
if (scp->isc_ownedfp) {
/* if FPU has current state, save it first */
if (l == fpcurlwp)
savefpregs(l);
(void)memcpy(&scp->isc_fpregs, &l->l_addr->u_pcb.pcb_fpregs,
sizeof(scp->isc_fpregs));
scp->isc_fpc_csr = l->l_addr->u_pcb.pcb_fpregs.r_regs[32];
}
#else
(void)memcpy(&scp->isc_fpregs, &l->l_addr->u_pcb.pcb_fpregs,
sizeof(scp->isc_fpregs));
#endif
/*
* Save signal stack
*/
scp->isc_ssflags =
(l->l_sigstk.ss_flags & SS_ONSTACK) ? IRIX_SS_ONSTACK : 0;
return;
}
void
irix_set_ucontext(struct irix_ucontext *ucp, const sigset_t *mask, int code, struct lwp *l)
{
struct frame *f;
KASSERT(mutex_owned(&l->l_proc->p_smutex));
#ifdef DEBUG_IRIX
printf("irix_set_ucontext()\n");
#endif
f = (struct frame *)l->l_md.md_regs;
/*
* Save general purpose registers
*/
native_to_irix_sigset(mask, &ucp->iuc_sigmask);
memcpy(&ucp->iuc_mcontext.svr4___gregs,
&f->f_regs, 32 * sizeof(mips_reg_t));
/* Theses registers have different order on NetBSD and IRIX */
ucp->iuc_mcontext.svr4___gregs[IRIX_CTX_MDLO] = f->f_regs[_R_MULLO];
ucp->iuc_mcontext.svr4___gregs[IRIX_CTX_MDHI] = f->f_regs[_R_MULHI];
ucp->iuc_mcontext.svr4___gregs[IRIX_CTX_EPC] = f->f_regs[_R_PC];
ucp->iuc_mcontext.svr4___gregs[IRIX_CTX_CAUSE] = f->f_regs[_R_CAUSE];
/*
* Save the floating-pointstate, if necessary, then copy it.
*/
#ifndef SOFTFLOAT
if (l->l_md.md_flags & MDP_FPUSED) {
/* if FPU has current state, save it first */
if (l == fpcurlwp)
savefpregs(l);
(void)memcpy(&ucp->iuc_mcontext.svr4___fpregs,
&l->l_addr->u_pcb.pcb_fpregs,
sizeof(ucp->iuc_mcontext.svr4___fpregs));
ucp->iuc_mcontext.svr4___fpregs.svr4___fp_csr =
l->l_addr->u_pcb.pcb_fpregs.r_regs[32];
}
#else
(void)memcpy(&ucp->iuc_mcontext.svr4___fpregs,
&l->l_addr->u_pcb.pcb_fpregs,
sizeof(ucp->iuc_mcontext.svr4___fpregs));
#endif
/*
* Save signal stack
*/
ucp->iuc_stack.ss_sp = l->l_sigstk.ss_sp;
ucp->iuc_stack.ss_size = l->l_sigstk.ss_size;
if (l->l_sigstk.ss_flags & SS_ONSTACK)
ucp->iuc_stack.ss_flags |= IRIX_SS_ONSTACK;
else
ucp->iuc_stack.ss_flags &= ~IRIX_SS_ONSTACK;
if (l->l_sigstk.ss_flags & SS_DISABLE)
ucp->iuc_stack.ss_flags |= IRIX_SS_DISABLE;
else
ucp->iuc_stack.ss_flags &= ~IRIX_SS_DISABLE;
/*
* Used fields in irix_ucontext: all
*/
ucp->iuc_flags = IRIX_UC_ALL;
return;
}
int
irix_sys_sigreturn(struct lwp *l, const struct irix_sys_sigreturn_args *uap, register_t *retval)
{
/* {
syscallarg(struct irix_sigcontext *) scp;
syscallarg(struct irix_ucontext *) ucp;
syscallarg(int) signo;
} */
void *usf;
struct irix_sigframe ksf;
struct proc *p = l->l_proc;
int error;
#ifdef DEBUG_IRIX
printf("irix_sys_sigreturn()\n");
printf("scp = %p, ucp = %p, sig = %d\n",
(void *)SCARG(uap, scp), (void *)SCARG(uap, ucp),
SCARG(uap, signo));
#endif /* DEBUG_IRIX */
/*
* The trampoline code hands us the context.
* It is unsafe to keep track of it ourselves, in the event that a
* program jumps out of a signal handler.
*/
usf = (void *)SCARG(uap, scp);
if (usf == NULL) {
usf = (void *)SCARG(uap, ucp);
if ((error = copyin(usf, &ksf.isf_ctx.iss.iuc,
sizeof(ksf.isf_ctx))) != 0)
return error;
mutex_enter(&p->p_smutex);
irix_get_ucontext(&ksf.isf_ctx.iss.iuc, l);
mutex_exit(&p->p_smutex);
} else {
if ((error = copyin(usf, &ksf.isf_ctx.isc,
sizeof(ksf.isf_ctx))) != 0)
return error;
mutex_enter(&p->p_smutex);
irix_get_sigcontext(&ksf.isf_ctx.isc, l);
mutex_exit(&p->p_smutex);
}
#ifdef DEBUG_IRIX
printf("irix_sys_sigreturn(): returning [PC=%p SP=%p SR=0x%08lx]\n",
(void *)((struct frame *)(l->l_md.md_regs))->f_regs[_R_PC],
(void *)((struct frame *)(l->l_md.md_regs))->f_regs[_R_SP],
((struct frame *)(l->l_md.md_regs))->f_regs[_R_SR]);
#endif
return EJUSTRETURN;
}
static void
irix_get_ucontext(struct irix_ucontext *ucp, struct lwp *l)
{
struct frame *f;
sigset_t mask;
KASSERT(mutex_owned(&l->l_proc->p_smutex));
/* Restore the register context. */
f = (struct frame *)l->l_md.md_regs;
if (ucp->iuc_flags & IRIX_UC_CPU) {
(void)memcpy(&f->f_regs, &ucp->iuc_mcontext.svr4___gregs,
32 * sizeof(mips_reg_t));
/* Theses registers have different order on NetBSD and IRIX */
f->f_regs[_R_MULLO] =
ucp->iuc_mcontext.svr4___gregs[IRIX_CTX_MDLO];
f->f_regs[_R_MULHI] =
ucp->iuc_mcontext.svr4___gregs[IRIX_CTX_MDHI];
f->f_regs[_R_PC] =
ucp->iuc_mcontext.svr4___gregs[IRIX_CTX_EPC];
}
if (ucp->iuc_flags & IRIX_UC_MAU) {
#ifndef SOFTFLOAT
/* Disable the FPU to fault in FP registers. */
f->f_regs[_R_SR] &= ~MIPS_SR_COP_1_BIT;
if (l == fpcurlwp)
fpcurlwp = NULL;
(void)memcpy(&l->l_addr->u_pcb.pcb_fpregs,
&ucp->iuc_mcontext.svr4___fpregs,
sizeof(l->l_addr->u_pcb.pcb_fpregs));
l->l_addr->u_pcb.pcb_fpregs.r_regs[32] =
ucp->iuc_mcontext.svr4___fpregs.svr4___fp_csr;
#else
(void)memcpy(&l->l_addr->u_pcb.pcb_fpregs,
&ucp->iuc_mcontext.svr4___fpregs,
sizeof(l->l_addr->u_pcb.pcb_fpregs));
#endif
}
/*
* Restore stack
*/
if (ucp->iuc_flags & IRIX_UC_STACK) {
l->l_sigstk.ss_sp = ucp->iuc_stack.ss_sp;
l->l_sigstk.ss_size = ucp->iuc_stack.ss_size;
if (ucp->iuc_stack.ss_flags & IRIX_SS_ONSTACK)
l->l_sigstk.ss_flags |= SS_ONSTACK;
else
l->l_sigstk.ss_flags &= ~SS_ONSTACK;
if (ucp->iuc_stack.ss_flags & IRIX_SS_DISABLE)
l->l_sigstk.ss_flags |= IRIX_SS_DISABLE;
else
l->l_sigstk.ss_flags &= ~IRIX_SS_DISABLE;
}
/*
* Restore signal mask
*/
if (ucp->iuc_flags & IRIX_UC_SIGMASK) {
/* Restore signal mask. */
irix_to_native_sigset(&ucp->iuc_sigmask, &mask);
(void)sigprocmask1(l, SIG_SETMASK, &mask, 0);
}
return;
}
static void
irix_get_sigcontext(struct irix_sigcontext *scp, struct lwp *l)
{
int i;
struct frame *f;
sigset_t mask;
KASSERT(mutex_owned(&l->l_proc->p_smutex));
/* Restore the register context. */
f = (struct frame *)l->l_md.md_regs;
for (i = 1; i < 32; i++) /* restore gpr1 to gpr31 */
f->f_regs[i] = scp->isc_regs[i];
f->f_regs[_R_MULLO] = scp->isc_mdlo;
f->f_regs[_R_MULHI] = scp->isc_mdhi;
f->f_regs[_R_PC] = scp->isc_pc;
#ifndef SOFTFLOAT
if (scp->isc_ownedfp) {
/* Disable the FPU to fault in FP registers. */
f->f_regs[_R_SR] &= ~MIPS_SR_COP_1_BIT;
if (l == fpcurlwp)
fpcurlwp = NULL;
(void)memcpy(&l->l_addr->u_pcb.pcb_fpregs, &scp->isc_fpregs,
sizeof(scp->isc_fpregs));
l->l_addr->u_pcb.pcb_fpregs.r_regs[32] = scp->isc_fpc_csr;
}
#else
(void)memcpy(&l->l_addr->u_pcb.pcb_fpregs, &scp->isc_fpregs,
sizeof(l->l_addr->u_pcb.pcb_fpregs));
#endif
/* Restore signal stack. */
if (scp->isc_ssflags & IRIX_SS_ONSTACK)
l->l_sigstk.ss_flags |= SS_ONSTACK;
else
l->l_sigstk.ss_flags &= ~SS_ONSTACK;
/* Restore signal mask. */
irix_to_native_sigset(&scp->isc_sigset, &mask);
(void)sigprocmask1(l, SIG_SETMASK, &mask, 0);
return;
}
int
irix_sys_sginap(struct lwp *l, const struct irix_sys_sginap_args *uap, register_t *retval)
{
/* {
syscallarg(long) ticks;
} */
int rticks = SCARG(uap, ticks);
struct timeval tvb, tve, tvd;
long long delta;
int dontcare;
if (rticks != 0)
microtime(&tvb);
if ((tsleep(&dontcare, PZERO|PCATCH, 0, rticks) != 0) &&
(rticks != 0)) {
microtime(&tve);
timersub(&tve, &tvb, &tvd);
delta = ((tvd.tv_sec * 1000000) + tvd.tv_usec); /* XXX */
*retval = (register_t)(rticks - (delta / tick));
}
return 0;
}
/*
* XXX Untested. Expect bugs and security problems here
*/
int
irix_sys_getcontext(struct lwp *l, const struct irix_sys_getcontext_args *uap, register_t *retval)
{
/* {
syscallarg(struct irix_ucontext *) ucp;
} */
struct proc *p = l->l_proc;
struct frame *f;
struct irix_ucontext kucp;
int i, error;
f = (struct frame *)l->l_md.md_regs;
kucp.iuc_flags = IRIX_UC_ALL;
kucp.iuc_link = NULL; /* XXX */
mutex_enter(&p->p_smutex);
native_to_irix_sigset(&l->l_sigmask, &kucp.iuc_sigmask);
kucp.iuc_stack.ss_sp = l->l_sigstk.ss_sp;
kucp.iuc_stack.ss_size = l->l_sigstk.ss_size;
kucp.iuc_stack.ss_flags = 0;
if (l->l_sigstk.ss_flags & SS_ONSTACK)
kucp.iuc_stack.ss_flags &= IRIX_SS_ONSTACK;
if (l->l_sigstk.ss_flags & SS_DISABLE)
kucp.iuc_stack.ss_flags &= IRIX_SS_DISABLE;
mutex_exit(&p->p_smutex);
for (i = 0; i < 36; i++) /* Is order correct? */
kucp.iuc_mcontext.svr4___gregs[i] = f->f_regs[i];
for (i = 0; i < 32; i++)
kucp.iuc_mcontext.svr4___fpregs.svr4___fp_r.svr4___fp_regs[i]
= 0; /* XXX where are FP registers? */
for (i = 0; i < 47; i++)
kucp.iuc_filler[i] = 0; /* XXX */
kucp.iuc_triggersave = 0; /* XXX */
error = copyout(&kucp, SCARG(uap, ucp), sizeof(kucp));
return error;
}
/*
* XXX Untested. Expect bugs and security problems here
*/
int
irix_sys_setcontext(struct lwp *l, const struct irix_sys_setcontext_args *uap, register_t *retval)
{
/* {
syscallarg(struct irix_ucontext *) ucp;
} */
struct proc *p = l->l_proc;
struct frame *f;
struct irix_ucontext kucp;
int i, error;
error = copyin(SCARG(uap, ucp), &kucp, sizeof(kucp));
if (error)
goto out;
f = (struct frame *)l->l_md.md_regs;
mutex_enter(&p->p_smutex);
if (kucp.iuc_flags & IRIX_UC_SIGMASK)
irix_to_native_sigset(&kucp.iuc_sigmask,
&l->l_sigmask);
if (kucp.iuc_flags & IRIX_UC_STACK) {
l->l_sigstk.ss_sp = kucp.iuc_stack.ss_sp;
l->l_sigstk.ss_size =
(unsigned long)kucp.iuc_stack.ss_sp;
l->l_sigstk.ss_flags = 0;
if (kucp.iuc_stack.ss_flags & IRIX_SS_ONSTACK)
l->l_sigstk.ss_flags &= SS_ONSTACK;
if (kucp.iuc_stack.ss_flags & IRIX_SS_DISABLE)
l->l_sigstk.ss_flags &= SS_DISABLE;
}
mutex_exit(&p->p_smutex);
if (kucp.iuc_flags & IRIX_UC_CPU)
for (i = 0; i < 36; i++) /* Is register order right? */
f->f_regs[i] = kucp.iuc_mcontext.svr4___gregs[i];
if (kucp.iuc_flags & IRIX_UC_MAU) { /* XXX */
#ifdef DEBUG_IRIX
printf("irix_sys_setcontext(): IRIX_UC_MAU requested\n");
#endif
}
out:
return error;
}
/*
* The following code is from svr4_sys_waitsys(), with a few lines added
* for supporting the rusage argument which is present in the IRIX version
* and not in the SVR4 version.
* Both version could be merged by creating a svr4_sys_waitsys1() with the
* rusage argument, and by calling it with NULL from svr4_sys_waitsys().
* irix_wait_siginfo is here because 1) svr4_setinfo is static and cannot be
* used here and 2) because struct irix_irix5_siginfo is quite different
* from svr4_siginfo. In order to merge, we need to include irix_signal.h
* from svr4_misc.c, or push the irix_irix5_siginfo into svr4_siginfo.h
*/
int
irix_sys_waitsys(struct lwp *l, const struct irix_sys_waitsys_args *uap, register_t *retval)
{
/* {
syscallarg(int) type;
syscallarg(int) pid;
syscallarg(struct irix_irix5_siginfo *) info;
syscallarg(int) options;
syscallarg(struct rusage *) ru;
} */
struct proc *parent = l->l_proc;
int options, status, error;
int was_zombie;
struct rusage ru;
int pid = SCARG(uap, pid);
switch (SCARG(uap, type)) {
case SVR4_P_PID:
break;
case SVR4_P_PGID:
pid = -parent->p_pgid;
break;
case SVR4_P_ALL:
pid = WAIT_ANY;
break;
default:
return EINVAL;
}
#ifdef DEBUG_IRIX
printf("waitsys(%d, %d, %p, %x, %p)\n",
SCARG(uap, type), pid,
SCARG(uap, info), SCARG(uap, options), SCARG(uap, ru));
#endif
/* Translate options */
options = WOPTSCHECKED;
if (SCARG(uap, options) & SVR4_WNOWAIT)
options |= WNOWAIT;
if (SCARG(uap, options) & SVR4_WNOHANG)
options |= WNOHANG;
if ((SCARG(uap, options) & (SVR4_WEXITED|SVR4_WTRAPPED)) == 0)
options |= WNOZOMBIE;
if (SCARG(uap, options) & (SVR4_WSTOPPED|SVR4_WCONTINUED))
options |= WUNTRACED;
error = do_sys_wait(l, &pid, &status, options, &ru, &was_zombie);
if (error != 0)
return error;
if (was_zombie) {
if (SCARG(uap, ru))
error = copyout(&ru, SCARG(uap, ru), sizeof(ru));
if (error != 0)
return error;
}
return irix_wait_siginfo(pid, &ru, status, SCARG(uap,info));
}
int
irix_sys_sigprocmask(struct lwp *l, const struct irix_sys_sigprocmask_args *uap, register_t *retval)
{
/* {
syscallarg(int) how;
syscallarg(const irix_sigset_t *) set;
syscallarg(irix_sigset_t *) oset;
} */
struct proc *p = l->l_proc;
struct svr4_sys_sigprocmask_args cup;
int error;
sigset_t obss, nbss;
irix_sigset_t niss, oiss;
if (SCARG(uap, how) != IRIX_SIG_SETMASK32) {
SCARG(&cup, how) = SCARG(uap, how);
SCARG(&cup, set) = (const svr4_sigset_t *)SCARG(uap, set);
SCARG(&cup, oset) = (svr4_sigset_t *)SCARG(uap, oset);
return svr4_sys_sigprocmask(l, &cup, retval);
}
if ((error = copyin(SCARG(uap, set), &niss, sizeof(niss))) != 0)
return error;
/* We must preserve the high bits of the irix sigmask, so mustget them */
native_to_irix_sigset(&l->l_sigmask, &oiss);
/* The irix bitmask is 128 bits, I think we only have the bottom 32 */
niss.bits[1] = oiss.bits[1];
niss.bits[2] = oiss.bits[2];
niss.bits[3] = oiss.bits[3];
/* We now need the corresponding netbsd mask */
irix_to_native_sigset(&niss, &nbss);
mutex_enter(&p->p_smutex);
error = sigprocmask1(l, SIG_SETMASK, &nbss, &obss);
mutex_exit(&p->p_smutex);
if (error != 0 || SCARG(&cup, oset) == NULL)
return error;
native_to_irix_sigset(&obss, &oiss);
/* XXX: should this copyout only be 4 bytes ? */
return copyout(&oiss, SCARG(&cup, oset), sizeof(oiss));
}
int
irix_sys_sigaction(struct lwp *l, const struct irix_sys_sigaction_args *uap, register_t *retval)
{
/* {
syscallarg(int) signum;
syscallarg(const struct svr4_sigaction *) nsa;
syscallarg(struct svr4_sigaction *) osa;
syscallarg(void *) sigtramp;
} */
struct proc *p = l->l_proc;
int signum;
struct svr4_sys_sigaction_args cup;
struct irix_emuldata *ied;
#ifdef DEBUG_IRIX
void *sigtramp;
#endif
/*
* On IRIX, the sigaction() system call has a fourth argument, which
* is a pointer to the signal trampoline code. The kernel does not
* seems to provide a signal trampoline, the user process has to
* embed it. Of course, the sigaction() stub in libc only has three
* argument. The fourth argument to the system call is filled by the
* libc.
*
* The signal trampoline does the following job:
* - holds extra bytes on the stack (48 on IRIX 6, 24 on IRIX 5)
* for the signal frame. See struct irix_sigframe in irix_signal.h
* for the details of the signal frame fields for IRIX 6.
* - checks if the higher bit of a0 is set (the kernel sets this
* when SA_SIGINFO is set)
* - if so, stores in a2 sf.isf_ucp, and NULL in sf.isf_scp
* SA_SIGACTION is set, we are using a struct irix_ucontext in a2
* - if not, stores a2 in sf.isf_scp. Here SA_SIGACTION is clear
* and we are using a struct irix_sigcontext in a2.
* - finds the address of errno, and stores it in sf.isf_uep (IRIX 6
* only). This is done by looking up the Global Offset Table and
* assuming that the errnoaddr symbol is at a fixed offset from
* the signal trampoline.
* - invoke the signal handler
* - sets errno using sf.isf_uep and sf.isf_errno (IRIX 6 only)
* - calls sigreturn(sf.isf_scp, sf.isf_ucp, sf.isf_signo) on IRIX 6
* and sigreturn(sf.isf_scp, sf.isf_ucp) on IRIX 5. Note that if
* SA_SIGINFO was set, then the higher bit of sf.isf_signo is
* still set.
*
* The signal trampoline is hence saved in the p_emuldata field
* of struct proc, in an array (one element for each signal)
*/
signum = SCARG(uap, signum);
if (signum < 0 || signum >= SVR4_NSIG)
return EINVAL;
signum = svr4_to_native_signo[signum];
ied = (struct irix_emuldata *)(p->p_emuldata);
#ifdef DEBUG_IRIX
sigtramp = ied->ied_sigtramp[signum];
if (sigtramp != NULL && sigtramp != SCARG(uap, sigtramp))
printf("Warning: sigtramp changed from %p to %p for sig. %d\n",
sigtramp, SCARG(uap, sigtramp), signum);
#endif
ied->ied_sigtramp[signum] = SCARG(uap, sigtramp);
SCARG(&cup, signum) = signum;
SCARG(&cup, nsa) = SCARG(uap, nsa);
SCARG(&cup, osa) = SCARG(uap, osa);
return svr4_sys_sigaction(l, &cup, retval);
}
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