1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2004 David Xu <davidxu@freebsd.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 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 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 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/types.h> 33 #include <machine/npx.h> 34 #include <string.h> 35 #include <thread_db.h> 36 37 #include "libpthread_db.h" 38 39 static int has_xmm_regs; 40 41 void 42 pt_reg_to_ucontext(const struct reg *r, ucontext_t *uc) 43 { 44 memcpy(&uc->uc_mcontext.mc_fs, &r->r_fs, 18*4); 45 uc->uc_mcontext.mc_gs = r->r_gs; 46 } 47 48 void 49 pt_ucontext_to_reg(const ucontext_t *uc, struct reg *r) 50 { 51 memcpy(&r->r_fs, &uc->uc_mcontext.mc_fs, 18*4); 52 r->r_gs = uc->uc_mcontext.mc_gs; 53 } 54 55 void 56 pt_fpreg_to_ucontext(const struct fpreg* r, ucontext_t *uc) 57 { 58 if (!has_xmm_regs) 59 memcpy(&uc->uc_mcontext.mc_fpstate, r, 60 sizeof(struct save87)); 61 else { 62 int i; 63 struct savexmm *sx = (struct savexmm *)&uc->uc_mcontext.mc_fpstate; 64 memcpy(&sx->sv_env, &r->fpr_env, sizeof(r->fpr_env)); 65 for (i = 0; i < 8; ++i) 66 memcpy(&sx->sv_fp[i].fp_acc, &r->fpr_acc[i], 10); 67 } 68 } 69 70 void 71 pt_ucontext_to_fpreg(const ucontext_t *uc, struct fpreg *r) 72 { 73 if (!has_xmm_regs) 74 memcpy(r, &uc->uc_mcontext.mc_fpstate, sizeof(struct save87)); 75 else { 76 int i; 77 const struct savexmm *sx = (const struct savexmm *)&uc->uc_mcontext.mc_fpstate; 78 memcpy(&r->fpr_env, &sx->sv_env, sizeof(r->fpr_env)); 79 for (i = 0; i < 8; ++i) 80 memcpy(&r->fpr_acc[i], &sx->sv_fp[i].fp_acc, 10); 81 } 82 } 83 84 void 85 pt_fxsave_to_ucontext(const char* r, ucontext_t *uc) 86 { 87 if (has_xmm_regs) 88 memcpy(&uc->uc_mcontext.mc_fpstate, r, sizeof(struct savexmm)); 89 } 90 91 void 92 pt_ucontext_to_fxsave(const ucontext_t *uc, char *r) 93 { 94 if (has_xmm_regs) 95 memcpy(r, &uc->uc_mcontext.mc_fpstate, sizeof(struct savexmm)); 96 } 97 98 void 99 pt_md_init(void) 100 { 101 ucontext_t uc; 102 103 getcontext(&uc); 104 if (uc.uc_mcontext.mc_fpformat == _MC_FPFMT_XMM) 105 has_xmm_regs = 1; 106 } 107 108 int 109 pt_reg_sstep(struct reg *reg, int step) 110 { 111 unsigned int old; 112 113 old = reg->r_eflags; 114 if (step) 115 reg->r_eflags |= 0x0100; 116 else 117 reg->r_eflags &= ~0x0100; 118 return (old != reg->r_eflags); /* changed ? */ 119 } 120 121