236 lines
6.1 KiB
C
236 lines
6.1 KiB
C
/*-
|
|
* Copyright (c) 2005 Peter Wemm
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include "opt_compat.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/exec.h>
|
|
#include <sys/fcntl.h>
|
|
#include <sys/imgact.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/mman.h>
|
|
#include <sys/namei.h>
|
|
#include <sys/pioctl.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/procfs.h>
|
|
#include <sys/resourcevar.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/signalvar.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/sx.h>
|
|
#include <sys/syscall.h>
|
|
#include <sys/sysctl.h>
|
|
#include <sys/sysent.h>
|
|
#include <sys/vnode.h>
|
|
|
|
#include <vm/vm.h>
|
|
#include <vm/vm_kern.h>
|
|
#include <vm/vm_param.h>
|
|
#include <vm/pmap.h>
|
|
#include <vm/vm_map.h>
|
|
#include <vm/vm_object.h>
|
|
#include <vm/vm_extern.h>
|
|
|
|
#include <compat/freebsd32/freebsd32_util.h>
|
|
#include <compat/freebsd32/freebsd32_proto.h>
|
|
#include <machine/fpu.h>
|
|
#include <machine/psl.h>
|
|
#include <machine/segments.h>
|
|
#include <machine/specialreg.h>
|
|
#include <machine/frame.h>
|
|
#include <machine/md_var.h>
|
|
#include <machine/pcb.h>
|
|
#include <machine/cpufunc.h>
|
|
|
|
#define CS_SECURE(cs) (ISPL(cs) == SEL_UPL)
|
|
#define EFL_SECURE(ef, oef) ((((ef) ^ (oef)) & ~PSL_USERCHANGE) == 0)
|
|
|
|
int
|
|
fill_regs32(struct thread *td, struct reg32 *regs)
|
|
{
|
|
struct pcb *pcb;
|
|
struct trapframe *tp;
|
|
|
|
tp = td->td_frame;
|
|
pcb = td->td_pcb;
|
|
if (tp->tf_flags & TF_HASSEGS) {
|
|
regs->r_gs = tp->tf_gs;
|
|
regs->r_fs = tp->tf_fs;
|
|
regs->r_es = tp->tf_es;
|
|
regs->r_ds = tp->tf_ds;
|
|
} else {
|
|
regs->r_gs = _ugssel;
|
|
regs->r_fs = _ufssel;
|
|
regs->r_es = _udatasel;
|
|
regs->r_ds = _udatasel;
|
|
}
|
|
regs->r_edi = tp->tf_rdi;
|
|
regs->r_esi = tp->tf_rsi;
|
|
regs->r_ebp = tp->tf_rbp;
|
|
regs->r_ebx = tp->tf_rbx;
|
|
regs->r_edx = tp->tf_rdx;
|
|
regs->r_ecx = tp->tf_rcx;
|
|
regs->r_eax = tp->tf_rax;
|
|
regs->r_eip = tp->tf_rip;
|
|
regs->r_cs = tp->tf_cs;
|
|
regs->r_eflags = tp->tf_rflags;
|
|
regs->r_esp = tp->tf_rsp;
|
|
regs->r_ss = tp->tf_ss;
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
set_regs32(struct thread *td, struct reg32 *regs)
|
|
{
|
|
struct pcb *pcb;
|
|
struct trapframe *tp;
|
|
|
|
tp = td->td_frame;
|
|
if (!EFL_SECURE(regs->r_eflags, tp->tf_rflags) || !CS_SECURE(regs->r_cs))
|
|
return (EINVAL);
|
|
pcb = td->td_pcb;
|
|
tp->tf_gs = regs->r_gs;
|
|
tp->tf_fs = regs->r_fs;
|
|
tp->tf_es = regs->r_es;
|
|
tp->tf_ds = regs->r_ds;
|
|
set_pcb_flags(pcb, PCB_FULL_IRET);
|
|
tp->tf_flags = TF_HASSEGS;
|
|
tp->tf_rdi = regs->r_edi;
|
|
tp->tf_rsi = regs->r_esi;
|
|
tp->tf_rbp = regs->r_ebp;
|
|
tp->tf_rbx = regs->r_ebx;
|
|
tp->tf_rdx = regs->r_edx;
|
|
tp->tf_rcx = regs->r_ecx;
|
|
tp->tf_rax = regs->r_eax;
|
|
tp->tf_rip = regs->r_eip;
|
|
tp->tf_cs = regs->r_cs;
|
|
tp->tf_rflags = regs->r_eflags;
|
|
tp->tf_rsp = regs->r_esp;
|
|
tp->tf_ss = regs->r_ss;
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
fill_fpregs32(struct thread *td, struct fpreg32 *regs)
|
|
{
|
|
struct savefpu *sv_fpu;
|
|
struct save87 *sv_87;
|
|
struct env87 *penv_87;
|
|
struct envxmm *penv_xmm;
|
|
int i;
|
|
|
|
bzero(regs, sizeof(*regs));
|
|
sv_87 = (struct save87 *)regs;
|
|
penv_87 = &sv_87->sv_env;
|
|
fpugetregs(td);
|
|
sv_fpu = get_pcb_user_save_td(td);
|
|
penv_xmm = &sv_fpu->sv_env;
|
|
|
|
/* FPU control/status */
|
|
penv_87->en_cw = penv_xmm->en_cw;
|
|
penv_87->en_sw = penv_xmm->en_sw;
|
|
penv_87->en_tw = penv_xmm->en_tw;
|
|
/*
|
|
* XXX for en_fip/fcs/foo/fos, check if the fxsave format
|
|
* uses the old-style layout for 32 bit user apps. If so,
|
|
* read the ip and operand segment registers from there.
|
|
* For now, use the process's %cs/%ds.
|
|
*/
|
|
penv_87->en_fip = penv_xmm->en_rip;
|
|
penv_87->en_fcs = td->td_frame->tf_cs;
|
|
penv_87->en_opcode = penv_xmm->en_opcode;
|
|
penv_87->en_foo = penv_xmm->en_rdp;
|
|
/* Entry into the kernel always sets TF_HASSEGS */
|
|
penv_87->en_fos = td->td_frame->tf_ds;
|
|
|
|
/* FPU registers */
|
|
for (i = 0; i < 8; ++i)
|
|
sv_87->sv_ac[i] = sv_fpu->sv_fp[i].fp_acc;
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
set_fpregs32(struct thread *td, struct fpreg32 *regs)
|
|
{
|
|
struct save87 *sv_87 = (struct save87 *)regs;
|
|
struct env87 *penv_87 = &sv_87->sv_env;
|
|
struct savefpu *sv_fpu = get_pcb_user_save_td(td);
|
|
struct envxmm *penv_xmm = &sv_fpu->sv_env;
|
|
int i;
|
|
|
|
/* FPU control/status */
|
|
penv_xmm->en_cw = penv_87->en_cw;
|
|
penv_xmm->en_sw = penv_87->en_sw;
|
|
penv_xmm->en_tw = penv_87->en_tw;
|
|
penv_xmm->en_rip = penv_87->en_fip;
|
|
/* penv_87->en_fcs and en_fos ignored, see above */
|
|
penv_xmm->en_opcode = penv_87->en_opcode;
|
|
penv_xmm->en_rdp = penv_87->en_foo;
|
|
|
|
/* FPU registers */
|
|
for (i = 0; i < 8; ++i)
|
|
sv_fpu->sv_fp[i].fp_acc = sv_87->sv_ac[i];
|
|
for (i = 8; i < 16; ++i)
|
|
bzero(&sv_fpu->sv_fp[i].fp_acc, sizeof(sv_fpu->sv_fp[i].fp_acc));
|
|
fpuuserinited(td);
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
fill_dbregs32(struct thread *td, struct dbreg32 *regs)
|
|
{
|
|
struct dbreg dr;
|
|
int err, i;
|
|
|
|
err = fill_dbregs(td, &dr);
|
|
for (i = 0; i < 8; i++)
|
|
regs->dr[i] = dr.dr[i];
|
|
return (err);
|
|
}
|
|
|
|
int
|
|
set_dbregs32(struct thread *td, struct dbreg32 *regs)
|
|
{
|
|
struct dbreg dr;
|
|
int i;
|
|
|
|
for (i = 0; i < 8; i++)
|
|
dr.dr[i] = regs->dr[i];
|
|
for (i = 8; i < 16; i++)
|
|
dr.dr[i] = 0;
|
|
return (set_dbregs(td, &dr));
|
|
}
|