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