1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2004 David Xu <davidxu@freebsd.org> 5 * Copyright (c) 2004 Marcel Moolenaar 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include <sys/procfs.h> 34 #include <string.h> 35 #include <thread_db.h> 36 #include <ucontext.h> 37 38 #include "libpthread_db.h" 39 40 void 41 pt_reg_to_ucontext(const struct reg *r, ucontext_t *uc) 42 { 43 mcontext_t *mc = &uc->uc_mcontext; 44 45 mc->mc_rdi = r->r_rdi; 46 mc->mc_rsi = r->r_rsi; 47 mc->mc_rdx = r->r_rdx; 48 mc->mc_rcx = r->r_rcx; 49 mc->mc_r8 = r->r_r8; 50 mc->mc_r9 = r->r_r9; 51 mc->mc_rax = r->r_rax; 52 mc->mc_rbx = r->r_rbx; 53 mc->mc_rbp = r->r_rbp; 54 mc->mc_r10 = r->r_r10; 55 mc->mc_r11 = r->r_r11; 56 mc->mc_r12 = r->r_r12; 57 mc->mc_r13 = r->r_r13; 58 mc->mc_r14 = r->r_r14; 59 mc->mc_r15 = r->r_r15; 60 mc->mc_rip = r->r_rip; 61 mc->mc_cs = r->r_cs; 62 mc->mc_rflags = r->r_rflags; 63 mc->mc_rsp = r->r_rsp; 64 mc->mc_ss = r->r_ss; 65 } 66 67 void 68 pt_ucontext_to_reg(const ucontext_t *uc, struct reg *r) 69 { 70 const mcontext_t *mc = &uc->uc_mcontext; 71 72 r->r_rdi = mc->mc_rdi; 73 r->r_rsi = mc->mc_rsi; 74 r->r_rdx = mc->mc_rdx; 75 r->r_rcx = mc->mc_rcx; 76 r->r_r8 = mc->mc_r8; 77 r->r_r9 = mc->mc_r9; 78 r->r_rax = mc->mc_rax; 79 r->r_rbx = mc->mc_rbx; 80 r->r_rbp = mc->mc_rbp; 81 r->r_r10 = mc->mc_r10; 82 r->r_r11 = mc->mc_r11; 83 r->r_r12 = mc->mc_r12; 84 r->r_r13 = mc->mc_r13; 85 r->r_r14 = mc->mc_r14; 86 r->r_r15 = mc->mc_r15; 87 r->r_rip = mc->mc_rip; 88 r->r_cs = mc->mc_cs; 89 r->r_rflags = mc->mc_rflags; 90 r->r_rsp = mc->mc_rsp; 91 r->r_ss = mc->mc_ss; 92 } 93 94 void 95 pt_fpreg_to_ucontext(const struct fpreg* r, ucontext_t *uc) 96 { 97 98 memcpy(&uc->uc_mcontext.mc_fpstate, r, sizeof(*r)); 99 } 100 101 void 102 pt_ucontext_to_fpreg(const ucontext_t *uc, struct fpreg *r) 103 { 104 105 memcpy(r, &uc->uc_mcontext.mc_fpstate, sizeof(*r)); 106 } 107 108 void 109 pt_md_init(void) 110 { 111 112 /* Nothing to do */ 113 } 114 115 int 116 pt_reg_sstep(struct reg *reg, int step) 117 { 118 register_t old; 119 120 old = reg->r_rflags; 121 if (step) 122 reg->r_rflags |= 0x0100; 123 else 124 reg->r_rflags &= ~0x0100; 125 return (old != reg->r_rflags); /* changed ? */ 126 } 127