f36ba45234
sysentvec. Initialized all fields of all sysentvecs, which will allow them to be used instead of constants in more places. Provided stack fixup routines for emulations that previously used the default.
369 lines
9.7 KiB
C
369 lines
9.7 KiB
C
/*-
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* Copyright (c) 2002 Doug Rabson
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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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* 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 AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#define __ELF_WORD_SIZE 32
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#include <sys/param.h>
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#include <sys/exec.h>
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#include <sys/fcntl.h>
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#include <sys/imgact.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/mutex.h>
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#include <sys/mman.h>
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#include <sys/namei.h>
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#include <sys/pioctl.h>
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#include <sys/proc.h>
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#include <sys/procfs.h>
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#include <sys/resourcevar.h>
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#include <sys/systm.h>
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#include <sys/signalvar.h>
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#include <sys/stat.h>
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#include <sys/sx.h>
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#include <sys/syscall.h>
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#include <sys/sysctl.h>
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#include <sys/sysent.h>
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#include <sys/vnode.h>
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#include <sys/imgact_elf.h>
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#include <vm/vm.h>
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#include <vm/vm_kern.h>
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#include <vm/vm_param.h>
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#include <vm/pmap.h>
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#include <vm/vm_map.h>
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#include <vm/vm_object.h>
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#include <vm/vm_extern.h>
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#include <ia64/ia32/ia32_util.h>
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#include <i386/include/psl.h>
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#include <i386/include/segments.h>
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#include <i386/include/specialreg.h>
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#include <machine/frame.h>
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#include <machine/md_var.h>
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static register_t *ia32_copyout_strings(struct image_params *imgp);
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static void ia32_setregs(struct thread *td, u_long entry, u_long stack,
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u_long ps_strings);
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extern struct sysent ia32_sysent[];
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static char ia32_sigcode[] = {
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0xff, 0x54, 0x24, 0x10, /* call *SIGF_HANDLER(%esp) */
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0x8d, 0x44, 0x24, 0x14, /* lea SIGF_UC(%esp),%eax */
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0x50, /* pushl %eax */
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0xf7, 0x40, 0x54, 0x00, 0x00, 0x02, 0x02, /* testl $PSL_VM,UC_EFLAGS(%eax) */
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0x75, 0x03, /* jne 9f */
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0x8e, 0x68, 0x14, /* movl UC_GS(%eax),%gs */
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0xb8, 0x57, 0x01, 0x00, 0x00, /* 9: movl $SYS_sigreturn,%eax */
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0x50, /* pushl %eax */
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0xcd, 0x80, /* int $0x80 */
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0xeb, 0xfe, /* 0: jmp 0b */
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0, 0, 0, 0
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};
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static int ia32_szsigcode = sizeof(ia32_sigcode) & ~3;
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struct sysentvec ia32_freebsd_sysvec = {
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SYS_MAXSYSCALL,
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ia32_sysent,
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0,
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0,
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NULL,
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0,
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NULL,
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NULL,
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elf32_freebsd_fixup,
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sendsig,
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ia32_sigcode,
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&ia32_szsigcode,
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NULL,
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"FreeBSD ELF",
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elf32_coredump,
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NULL,
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MINSIGSTKSZ,
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4096,
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0,
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IA32_USRSTACK,
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IA32_USRSTACK,
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IA32_PS_STRINGS,
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VM_PROT_ALL,
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ia32_copyout_strings,
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ia32_setregs
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};
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static Elf32_Brandinfo ia32_brand_info = {
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ELFOSABI_FREEBSD,
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EM_386,
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"FreeBSD",
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"/compat/ia32",
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"/usr/libexec/ld-elf.so.1",
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&ia32_freebsd_sysvec
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};
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SYSINIT(ia32, SI_SUB_EXEC, SI_ORDER_ANY,
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(sysinit_cfunc_t) elf32_insert_brand_entry,
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&ia32_brand_info);
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static register_t *
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ia32_copyout_strings(struct image_params *imgp)
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{
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int argc, envc;
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u_int32_t *vectp;
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char *stringp, *destp;
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u_int32_t *stack_base;
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struct ia32_ps_strings *arginfo;
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int szsigcode;
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/*
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* Calculate string base and vector table pointers.
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* Also deal with signal trampoline code for this exec type.
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*/
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arginfo = (struct ia32_ps_strings *)IA32_PS_STRINGS;
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szsigcode = *(imgp->proc->p_sysent->sv_szsigcode);
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destp = (caddr_t)arginfo - szsigcode - SPARE_USRSPACE -
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roundup((ARG_MAX - imgp->stringspace), sizeof(char *));
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/*
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* install sigcode
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*/
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if (szsigcode)
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copyout(imgp->proc->p_sysent->sv_sigcode,
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((caddr_t)arginfo - szsigcode), szsigcode);
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/*
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* If we have a valid auxargs ptr, prepare some room
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* on the stack.
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*/
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if (imgp->auxargs) {
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/*
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* 'AT_COUNT*2' is size for the ELF Auxargs data. This is for
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* lower compatibility.
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*/
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imgp->auxarg_size = (imgp->auxarg_size) ? imgp->auxarg_size
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: (AT_COUNT * 2);
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/*
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* The '+ 2' is for the null pointers at the end of each of
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* the arg and env vector sets,and imgp->auxarg_size is room
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* for argument of Runtime loader.
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*/
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vectp = (u_int32_t *) (destp - (imgp->argc + imgp->envc + 2 +
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imgp->auxarg_size) * sizeof(u_int32_t));
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} else
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/*
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* The '+ 2' is for the null pointers at the end of each of
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* the arg and env vector sets
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*/
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vectp = (u_int32_t *)
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(destp - (imgp->argc + imgp->envc + 2) * sizeof(u_int32_t));
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/*
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* vectp also becomes our initial stack base
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*/
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stack_base = vectp;
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stringp = imgp->stringbase;
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argc = imgp->argc;
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envc = imgp->envc;
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/*
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* Copy out strings - arguments and environment.
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*/
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copyout(stringp, destp, ARG_MAX - imgp->stringspace);
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/*
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* Fill in "ps_strings" struct for ps, w, etc.
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*/
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suword32(&arginfo->ps_argvstr, (u_int32_t)(intptr_t)vectp);
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suword32(&arginfo->ps_nargvstr, argc);
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/*
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* Fill in argument portion of vector table.
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*/
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for (; argc > 0; --argc) {
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suword32(vectp++, (u_int32_t)(intptr_t)destp);
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while (*stringp++ != 0)
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destp++;
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destp++;
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}
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/* a null vector table pointer separates the argp's from the envp's */
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suword32(vectp++, 0);
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suword32(&arginfo->ps_envstr, (u_int32_t)(intptr_t)vectp);
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suword32(&arginfo->ps_nenvstr, envc);
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/*
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* Fill in environment portion of vector table.
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*/
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for (; envc > 0; --envc) {
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suword32(vectp++, (u_int32_t)(intptr_t)destp);
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while (*stringp++ != 0)
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destp++;
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destp++;
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}
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/* end of vector table is a null pointer */
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suword32(vectp, 0);
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return ((register_t *)stack_base);
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}
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static void
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ia32_setregs(struct thread *td, u_long entry, u_long stack, u_long ps_strings)
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{
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struct trapframe *frame = td->td_frame;
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vm_offset_t gdt, ldt;
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u_int64_t codesel, datasel, ldtsel;
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u_int64_t codeseg, dataseg, gdtseg, ldtseg;
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struct segment_descriptor desc;
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struct vmspace *vmspace = td->td_proc->p_vmspace;
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/*
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* Make sure that we restore the entire trapframe after an
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* execve.
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*/
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frame->tf_flags &= ~FRAME_SYSCALL;
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bzero(frame->tf_r, sizeof(frame->tf_r));
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bzero(frame->tf_f, sizeof(frame->tf_f));
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frame->tf_cr_iip = entry;
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frame->tf_cr_ipsr = (IA64_PSR_IC
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| IA64_PSR_I
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| IA64_PSR_IT
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| IA64_PSR_DT
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| IA64_PSR_RT
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| IA64_PSR_DFH
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| IA64_PSR_IS
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| IA64_PSR_BN
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| IA64_PSR_CPL_USER);
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frame->tf_r[FRAME_R12] = stack;
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codesel = LSEL(LUCODE_SEL, SEL_UPL);
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datasel = LSEL(LUDATA_SEL, SEL_UPL);
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ldtsel = GSEL(GLDT_SEL, SEL_UPL);
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#if 1
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frame->tf_r[FRAME_R16] = (datasel << 48) | (datasel << 32)
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| (datasel << 16) | datasel;
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frame->tf_r[FRAME_R17] = (ldtsel << 32) | (datasel << 16) | codesel;
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#else
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frame->tf_r[FRAME_R16] = datasel;
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frame->tf_r[FRAME_R17] = codesel;
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frame->tf_r[FRAME_R18] = datasel;
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frame->tf_r[FRAME_R19] = datasel;
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frame->tf_r[FRAME_R20] = datasel;
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frame->tf_r[FRAME_R21] = datasel;
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frame->tf_r[FRAME_R22] = ldtsel;
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#endif
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/*
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* Build the GDT and LDT.
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*/
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gdt = IA32_USRSTACK;
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vm_map_find(&vmspace->vm_map, 0, 0,
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&gdt, PAGE_SIZE, 0,
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VM_PROT_ALL, VM_PROT_ALL, 0);
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ldt = gdt + 4096;
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desc.sd_lolimit = 8*NLDT-1;
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desc.sd_lobase = ldt & 0xffffff;
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desc.sd_type = SDT_SYSLDT;
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desc.sd_dpl = SEL_UPL;
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desc.sd_p = 1;
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desc.sd_hilimit = 0;
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desc.sd_def32 = 0;
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desc.sd_gran = 0;
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desc.sd_hibase = ldt >> 24;
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copyout(&desc, (caddr_t) gdt + 8*GLDT_SEL, sizeof(desc));
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desc.sd_lolimit = ((IA32_USRSTACK >> 12) - 1) & 0xffff;
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desc.sd_lobase = 0;
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desc.sd_type = SDT_MEMERA;
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desc.sd_dpl = SEL_UPL;
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desc.sd_p = 1;
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desc.sd_hilimit = ((IA32_USRSTACK >> 12) - 1) >> 16;
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desc.sd_def32 = 1;
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desc.sd_gran = 1;
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desc.sd_hibase = 0;
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copyout(&desc, (caddr_t) ldt + 8*LUCODE_SEL, sizeof(desc));
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desc.sd_type = SDT_MEMRWA;
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copyout(&desc, (caddr_t) ldt + 8*LUDATA_SEL, sizeof(desc));
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codeseg = 0 /* base */
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+ (((IA32_USRSTACK >> 12) - 1) << 32) /* limit */
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+ ((long)SDT_MEMERA << 52)
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+ ((long)SEL_UPL << 57)
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+ (1L << 59) /* present */
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+ (1L << 62) /* 32 bits */
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+ (1L << 63); /* page granularity */
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dataseg = 0 /* base */
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+ (((IA32_USRSTACK >> 12) - 1) << 32) /* limit */
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+ ((long)SDT_MEMRWA << 52)
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+ ((long)SEL_UPL << 57)
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+ (1L << 59) /* present */
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+ (1L << 62) /* 32 bits */
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+ (1L << 63); /* page granularity */
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ia64_set_csd(codeseg);
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ia64_set_ssd(dataseg);
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frame->tf_r[FRAME_R24] = dataseg; /* ESD */
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frame->tf_r[FRAME_R27] = dataseg; /* DSD */
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frame->tf_r[FRAME_R28] = dataseg; /* FSD */
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frame->tf_r[FRAME_R29] = dataseg; /* GSD */
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gdtseg = gdt /* base */
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+ ((8L*NGDT - 1) << 32) /* limit */
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+ ((long)SDT_SYSNULL << 52)
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+ ((long)SEL_UPL << 57)
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+ (1L << 59) /* present */
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+ (0L << 62) /* 16 bits */
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+ (0L << 63); /* byte granularity */
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ldtseg = ldt /* base */
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+ ((8L*NLDT - 1) << 32) /* limit */
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+ ((long)SDT_SYSLDT << 52)
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+ ((long)SEL_UPL << 57)
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+ (1L << 59) /* present */
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+ (0L << 62) /* 16 bits */
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+ (0L << 63); /* byte granularity */
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frame->tf_r[FRAME_R30] = ldtseg; /* LDTD */
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frame->tf_r[FRAME_R31] = gdtseg; /* GDTD */
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ia64_set_eflag(PSL_USER);
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/* PS_STRINGS value for BSD/OS binaries. It is 0 for non-BSD/OS. */
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frame->tf_r[FRAME_R11] = IA32_PS_STRINGS;
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/*
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* XXX - Linux emulator
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* Make sure sure edx is 0x0 on entry. Linux binaries depend
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* on it.
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*/
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td->td_retval[1] = 0;
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}
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