2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2005 Peter Wemm
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
34 #include <sys/param.h>
36 #include <sys/fcntl.h>
37 #include <sys/imgact.h>
38 #include <sys/kernel.h>
40 #include <sys/malloc.h>
41 #include <sys/mutex.h>
43 #include <sys/namei.h>
44 #include <sys/pioctl.h>
46 #include <sys/procfs.h>
47 #include <sys/resourcevar.h>
48 #include <sys/systm.h>
49 #include <sys/signalvar.h>
52 #include <sys/syscall.h>
53 #include <sys/sysctl.h>
54 #include <sys/sysent.h>
55 #include <sys/vnode.h>
58 #include <vm/vm_kern.h>
59 #include <vm/vm_param.h>
61 #include <vm/vm_map.h>
62 #include <vm/vm_object.h>
63 #include <vm/vm_extern.h>
65 #include <compat/freebsd32/freebsd32_util.h>
66 #include <compat/freebsd32/freebsd32_proto.h>
67 #include <machine/fpu.h>
68 #include <machine/psl.h>
69 #include <machine/segments.h>
70 #include <machine/specialreg.h>
71 #include <machine/frame.h>
72 #include <machine/md_var.h>
73 #include <machine/pcb.h>
74 #include <machine/cpufunc.h>
76 #define CS_SECURE(cs) (ISPL(cs) == SEL_UPL)
77 #define EFL_SECURE(ef, oef) ((((ef) ^ (oef)) & ~PSL_USERCHANGE) == 0)
80 fill_regs32(struct thread *td, struct reg32 *regs)
85 if (tp->tf_flags & TF_HASSEGS) {
86 regs->r_gs = tp->tf_gs;
87 regs->r_fs = tp->tf_fs;
88 regs->r_es = tp->tf_es;
89 regs->r_ds = tp->tf_ds;
93 regs->r_es = _udatasel;
94 regs->r_ds = _udatasel;
96 regs->r_edi = tp->tf_rdi;
97 regs->r_esi = tp->tf_rsi;
98 regs->r_ebp = tp->tf_rbp;
99 regs->r_ebx = tp->tf_rbx;
100 regs->r_edx = tp->tf_rdx;
101 regs->r_ecx = tp->tf_rcx;
102 regs->r_eax = tp->tf_rax;
103 regs->r_eip = tp->tf_rip;
104 regs->r_cs = tp->tf_cs;
105 regs->r_eflags = tp->tf_rflags;
106 regs->r_esp = tp->tf_rsp;
107 regs->r_ss = tp->tf_ss;
114 set_regs32(struct thread *td, struct reg32 *regs)
116 struct trapframe *tp;
119 if (!EFL_SECURE(regs->r_eflags, tp->tf_rflags) || !CS_SECURE(regs->r_cs))
121 tp->tf_gs = regs->r_gs;
122 tp->tf_fs = regs->r_fs;
123 tp->tf_es = regs->r_es;
124 tp->tf_ds = regs->r_ds;
125 set_pcb_flags(td->td_pcb, PCB_FULL_IRET);
126 tp->tf_flags = TF_HASSEGS;
127 tp->tf_rdi = regs->r_edi;
128 tp->tf_rsi = regs->r_esi;
129 tp->tf_rbp = regs->r_ebp;
130 tp->tf_rbx = regs->r_ebx;
131 tp->tf_rdx = regs->r_edx;
132 tp->tf_rcx = regs->r_ecx;
133 tp->tf_rax = regs->r_eax;
134 tp->tf_rip = regs->r_eip;
135 tp->tf_cs = regs->r_cs;
136 tp->tf_rflags = regs->r_eflags;
137 tp->tf_rsp = regs->r_esp;
138 tp->tf_ss = regs->r_ss;
143 fill_fpregs32(struct thread *td, struct fpreg32 *regs)
145 struct savefpu *sv_fpu;
146 struct save87 *sv_87;
147 struct env87 *penv_87;
148 struct envxmm *penv_xmm;
151 bzero(regs, sizeof(*regs));
152 sv_87 = (struct save87 *)regs;
153 penv_87 = &sv_87->sv_env;
155 sv_fpu = get_pcb_user_save_td(td);
156 penv_xmm = &sv_fpu->sv_env;
158 /* FPU control/status */
159 penv_87->en_cw = penv_xmm->en_cw;
160 penv_87->en_sw = penv_xmm->en_sw;
163 * XXX for en_fip/fcs/foo/fos, check if the fxsave format
164 * uses the old-style layout for 32 bit user apps. If so,
165 * read the ip and operand segment registers from there.
166 * For now, use the process's %cs/%ds.
168 penv_87->en_fip = penv_xmm->en_rip;
169 penv_87->en_fcs = td->td_frame->tf_cs;
170 penv_87->en_opcode = penv_xmm->en_opcode;
171 penv_87->en_foo = penv_xmm->en_rdp;
172 /* Entry into the kernel always sets TF_HASSEGS */
173 penv_87->en_fos = td->td_frame->tf_ds;
175 /* FPU registers and tags */
176 penv_87->en_tw = 0xffff;
177 for (i = 0; i < 8; ++i) {
178 sv_87->sv_ac[i] = sv_fpu->sv_fp[i].fp_acc;
179 if ((penv_xmm->en_tw & (1 << i)) != 0)
180 penv_87->en_tw &= ~(3 << i * 2);
187 set_fpregs32(struct thread *td, struct fpreg32 *regs)
189 struct save87 *sv_87 = (struct save87 *)regs;
190 struct env87 *penv_87 = &sv_87->sv_env;
191 struct savefpu *sv_fpu = get_pcb_user_save_td(td);
192 struct envxmm *penv_xmm = &sv_fpu->sv_env;
195 /* FPU control/status */
196 penv_xmm->en_cw = penv_87->en_cw;
197 penv_xmm->en_sw = penv_87->en_sw;
198 penv_xmm->en_rip = penv_87->en_fip;
199 /* penv_87->en_fcs and en_fos ignored, see above */
200 penv_xmm->en_opcode = penv_87->en_opcode;
201 penv_xmm->en_rdp = penv_87->en_foo;
203 /* FPU registers and tags */
205 for (i = 0; i < 8; ++i) {
206 sv_fpu->sv_fp[i].fp_acc = sv_87->sv_ac[i];
207 if ((penv_87->en_tw & (3 << i * 2)) != (3 << i * 2))
208 penv_xmm->en_tw |= 1 << i;
211 for (i = 8; i < 16; ++i)
212 bzero(&sv_fpu->sv_fp[i].fp_acc, sizeof(sv_fpu->sv_fp[i].fp_acc));
219 fill_dbregs32(struct thread *td, struct dbreg32 *regs)
224 err = fill_dbregs(td, &dr);
225 for (i = 0; i < 8; i++)
226 regs->dr[i] = dr.dr[i];
231 set_dbregs32(struct thread *td, struct dbreg32 *regs)
236 for (i = 0; i < 8; i++)
237 dr.dr[i] = regs->dr[i];
238 for (i = 8; i < 16; i++)
240 return (set_dbregs(td, &dr));