3341592139
the arguments array instead of array itself. ia64 syscall arguments are readily available in the frame, point args to it, do not do unnecessary bcopy. Still reserve the array in syscall_args for ia32 emulation. Suggested and reviewed by: marcel MFC after: 1 month
282 lines
6.6 KiB
C
282 lines
6.6 KiB
C
/*-
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* Copyright (c) 2004 Marcel Moolenaar
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/ktr.h>
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#include <sys/sysproto.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/pioctl.h>
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#include <sys/proc.h>
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#include <sys/ptrace.h>
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#include <sys/signalvar.h>
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#include <sys/syscall.h>
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#include <sys/sysent.h>
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#include <machine/cpu.h>
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#include <machine/fpu.h>
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#include <machine/frame.h>
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#include <machine/md_var.h>
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#include <i386/include/psl.h>
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#include <security/audit/audit.h>
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#include <compat/ia32/ia32_util.h>
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void
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ia32_set_syscall_retval(struct thread *td, int error)
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{
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struct proc *p;
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struct trapframe *tf;
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tf = td->td_frame;
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switch (error) {
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case 0:
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tf->tf_scratch.gr8 = td->td_retval[0]; /* eax */
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tf->tf_scratch.gr10 = td->td_retval[1]; /* edx */
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ia64_set_eflag(ia64_get_eflag() & ~PSL_C);
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break;
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case ERESTART:
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/*
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* Reconstruct pc, assuming lcall $X,y is 7 bytes,
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* int 0x80 is 2 bytes. XXX Assume int 0x80.
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*/
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tf->tf_special.iip -= 2;
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break;
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case EJUSTRETURN:
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break;
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default:
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p = td->td_proc;
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if (p->p_sysent->sv_errsize) {
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if (error >= p->p_sysent->sv_errsize)
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error = -1; /* XXX */
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else
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error = p->p_sysent->sv_errtbl[error];
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}
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tf->tf_scratch.gr8 = error;
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ia64_set_eflag(ia64_get_eflag() | PSL_C);
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break;
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}
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}
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int
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ia32_fetch_syscall_args(struct thread *td, struct syscall_args *sa)
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{
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struct trapframe *tf;
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struct proc *p;
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uint32_t args[8];
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caddr_t params;
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int error, i;
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tf = td->td_frame;
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p = td->td_proc;
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params = (caddr_t)(tf->tf_special.sp & ((1L<<32)-1)) +
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sizeof(uint32_t);
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sa->code = tf->tf_scratch.gr8; /* eax */
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if (sa->code == SYS_syscall) {
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/* Code is first argument, followed by actual args. */
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sa->code = fuword32(params);
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params += sizeof(int);
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} else if (sa->code == SYS___syscall) {
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/*
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* Like syscall, but code is a quad, so as to maintain
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* quad alignment for the rest of the arguments. We
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* use a 32-bit fetch in case params is not aligned.
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*/
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sa->code = fuword32(params);
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params += sizeof(quad_t);
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}
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if (p->p_sysent->sv_mask)
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sa->code &= p->p_sysent->sv_mask;
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if (sa->code >= p->p_sysent->sv_size)
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sa->callp = &p->p_sysent->sv_table[0];
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else
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sa->callp = &p->p_sysent->sv_table[sa->code];
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sa->narg = sa->callp->sy_narg;
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if (params != NULL && sa->narg != 0)
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error = copyin(params, (caddr_t)args, sa->narg * sizeof(int));
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else
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error = 0;
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sa->args = &sa->args32[0];
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if (error == 0) {
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for (i = 0; i < sa->narg; i++)
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sa->args32[i] = args[i];
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td->td_retval[0] = 0;
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td->td_retval[1] = tf->tf_scratch.gr10; /* edx */
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}
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return (error);
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}
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static void
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ia32_syscall(struct trapframe *tf)
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{
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struct thread *td;
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struct syscall_args sa;
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register_t eflags;
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int error;
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ksiginfo_t ksi;
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td = curthread;
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eflags = ia64_get_eflag();
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error = syscallenter(td, &sa);
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/*
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* Traced syscall.
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*/
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if ((eflags & PSL_T) && !(eflags & PSL_VM)) {
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ia64_set_eflag(ia64_get_eflag() & ~PSL_T);
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ksiginfo_init_trap(&ksi);
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ksi.ksi_signo = SIGTRAP;
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ksi.ksi_code = TRAP_TRACE;
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ksi.ksi_addr = (void *)tf->tf_special.iip;
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trapsignal(td, &ksi);
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}
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syscallret(td, error, &sa);
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}
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/*
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* ia32_trap() is called from exception.S to handle the IA-32 specific
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* interruption vectors.
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*/
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void
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ia32_trap(int vector, struct trapframe *tf)
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{
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struct proc *p;
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struct thread *td;
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uint64_t ucode;
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int sig;
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ksiginfo_t ksi;
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KASSERT(TRAPF_USERMODE(tf), ("%s: In kernel mode???", __func__));
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ia64_set_fpsr(IA64_FPSR_DEFAULT);
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PCPU_INC(cnt.v_trap);
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td = curthread;
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td->td_frame = tf;
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td->td_pticks = 0;
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p = td->td_proc;
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if (td->td_ucred != p->p_ucred)
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cred_update_thread(td);
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sig = 0;
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ucode = 0;
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switch (vector) {
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case IA64_VEC_IA32_EXCEPTION:
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switch ((tf->tf_special.isr >> 16) & 0xffff) {
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case IA32_EXCEPTION_DIVIDE:
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ucode = FPE_INTDIV;
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sig = SIGFPE;
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break;
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case IA32_EXCEPTION_DEBUG:
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case IA32_EXCEPTION_BREAK:
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sig = SIGTRAP;
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break;
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case IA32_EXCEPTION_OVERFLOW:
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ucode = FPE_INTOVF;
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sig = SIGFPE;
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break;
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case IA32_EXCEPTION_BOUND:
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ucode = FPE_FLTSUB;
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sig = SIGFPE;
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break;
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case IA32_EXCEPTION_DNA:
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ucode = 0;
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sig = SIGFPE;
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break;
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case IA32_EXCEPTION_NOT_PRESENT:
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case IA32_EXCEPTION_STACK_FAULT:
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case IA32_EXCEPTION_GPFAULT:
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ucode = (tf->tf_special.isr & 0xffff) + BUS_SEGM_FAULT;
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sig = SIGBUS;
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break;
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case IA32_EXCEPTION_FPERROR:
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ucode = 0; /* XXX */
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sig = SIGFPE;
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break;
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case IA32_EXCEPTION_ALIGNMENT_CHECK:
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ucode = tf->tf_special.ifa; /* VA */
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sig = SIGBUS;
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break;
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case IA32_EXCEPTION_STREAMING_SIMD:
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ucode = 0; /* XXX */
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sig = SIGFPE;
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break;
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default:
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trap_panic(vector, tf);
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break;
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}
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break;
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case IA64_VEC_IA32_INTERCEPT:
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/* XXX Maybe need to emulate ia32 instruction. */
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trap_panic(vector, tf);
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case IA64_VEC_IA32_INTERRUPT:
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/* INT n instruction - probably a syscall. */
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if (((tf->tf_special.isr >> 16) & 0xffff) == 0x80) {
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ia32_syscall(tf);
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goto out;
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}
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ucode = (tf->tf_special.isr >> 16) & 0xffff;
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sig = SIGILL;
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break;
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default:
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/* Should never happen of course. */
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trap_panic(vector, tf);
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break;
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}
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KASSERT(sig != 0, ("%s: signal not set", __func__));
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ksiginfo_init_trap(&ksi);
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ksi.ksi_signo = sig;
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ksi.ksi_code = (int)ucode; /* XXX */
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/* ksi.ksi_addr */
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trapsignal(td, &ksi);
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out:
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userret(td, tf);
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mtx_assert(&Giant, MA_NOTOWNED);
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do_ast(tf);
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}
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