288 lines
8.1 KiB
C
288 lines
8.1 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_compat.h"
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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 <sys/sysproto.h>
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#include <machine/frame.h>
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#include <machine/md_var.h>
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#include <machine/pcb.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 <compat/freebsd32/freebsd32_signal.h>
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#include <compat/freebsd32/freebsd32_util.h>
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#include <compat/freebsd32/freebsd32_proto.h>
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#include <compat/ia32/ia32_signal.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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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(%ea
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x) */
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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
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};
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int sz_ia32_sigcode = sizeof(ia32_sigcode);
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/*
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* Signal sending has not been implemented on ia64. This causes
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* the sigtramp code to not understand the arguments and the application
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* will generally crash if it tries to handle a signal. Calling
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* sendsig() means that at least untrapped signals will work.
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*/
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void
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ia32_sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
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{
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sendsig(catcher, ksi, mask);
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}
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#ifdef COMPAT_FREEBSD4
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int
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freebsd4_freebsd32_sigreturn(struct thread *td, struct freebsd4_freebsd32_sigreturn_args *uap)
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{
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return (sigreturn(td, (struct sigreturn_args *)uap));
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}
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#endif
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int
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freebsd32_sigreturn(struct thread *td, struct freebsd32_sigreturn_args *uap)
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{
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return (sigreturn(td, (struct sigreturn_args *)uap));
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}
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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 *tf = 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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exec_setregs(td, entry, stack, ps_strings);
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/* Non-syscall frames are cleared by exec_setregs() */
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if (tf->tf_flags & FRAME_SYSCALL) {
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bzero(&tf->tf_scratch, sizeof(tf->tf_scratch));
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bzero(&tf->tf_scratch_fp, sizeof(tf->tf_scratch_fp));
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} else
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tf->tf_special.ndirty = 0;
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tf->tf_special.psr |= IA64_PSR_IS;
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tf->tf_special.sp = stack;
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/* Point the RSE backstore to something harmless. */
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tf->tf_special.bspstore = (FREEBSD32_PS_STRINGS - sz_ia32_sigcode -
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SPARE_USRSPACE + 15) & ~15;
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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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/* Setup ia32 segment registers. */
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tf->tf_scratch.gr16 = (datasel << 48) | (datasel << 32) |
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(datasel << 16) | datasel;
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tf->tf_scratch.gr17 = (ldtsel << 32) | (datasel << 16) | codesel;
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/*
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* Build the GDT and LDT.
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*/
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gdt = FREEBSD32_USRSTACK;
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vm_map_find(&vmspace->vm_map, 0, 0, &gdt, IA32_PAGE_SIZE << 1, 0,
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VM_PROT_ALL, VM_PROT_ALL, 0);
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ldt = gdt + IA32_PAGE_SIZE;
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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 = ((FREEBSD32_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 = ((FREEBSD32_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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+ (((FREEBSD32_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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+ (((FREEBSD32_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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tf->tf_scratch.csd = codeseg;
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tf->tf_scratch.ssd = dataseg;
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tf->tf_scratch.gr24 = dataseg; /* ESD */
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tf->tf_scratch.gr27 = dataseg; /* DSD */
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tf->tf_scratch.gr28 = dataseg; /* FSD */
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tf->tf_scratch.gr29 = 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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tf->tf_scratch.gr30 = ldtseg; /* LDTD */
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tf->tf_scratch.gr31 = gdtseg; /* GDTD */
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/* Set ia32 control registers on this processor. */
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ia64_set_cflg(CR0_PE | CR0_PG | ((long)(CR4_XMM | CR4_FXSR) << 32));
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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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tf->tf_scratch.gr11 = FREEBSD32_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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void
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ia32_restorectx(struct pcb *pcb)
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{
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ia64_set_cflg(pcb->pcb_ia32_cflg);
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ia64_set_eflag(pcb->pcb_ia32_eflag);
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ia64_set_fcr(pcb->pcb_ia32_fcr);
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ia64_set_fdr(pcb->pcb_ia32_fdr);
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ia64_set_fir(pcb->pcb_ia32_fir);
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ia64_set_fsr(pcb->pcb_ia32_fsr);
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}
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void
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ia32_savectx(struct pcb *pcb)
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{
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pcb->pcb_ia32_cflg = ia64_get_cflg();
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pcb->pcb_ia32_eflag = ia64_get_eflag();
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pcb->pcb_ia32_fcr = ia64_get_fcr();
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pcb->pcb_ia32_fdr = ia64_get_fdr();
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pcb->pcb_ia32_fir = ia64_get_fir();
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pcb->pcb_ia32_fsr = ia64_get_fsr();
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}
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int
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freebsd32_getcontext(struct thread *td, struct freebsd32_getcontext_args *uap)
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{
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return (nosys(td, NULL));
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}
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int
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freebsd32_setcontext(struct thread *td, struct freebsd32_setcontext_args *uap)
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{
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return (nosys(td, NULL));
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}
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int
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freebsd32_swapcontext(struct thread *td, struct freebsd32_swapcontext_args *uap)
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{
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return (nosys(td, NULL));
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}
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