1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 #include <sys/types.h> 31 #include <machine/npx.h> 32 #include <string.h> 33 #include <thread_db.h> 34 35 #include "libpthread_db.h" 36 37 static int has_xmm_regs; 38 39 void 40 pt_reg_to_ucontext(const struct reg *r, ucontext_t *uc) 41 { 42 memcpy(&uc->uc_mcontext.mc_fs, &r->r_fs, 18*4); 43 uc->uc_mcontext.mc_gs = r->r_gs; 44 } 45 46 void 47 pt_ucontext_to_reg(const ucontext_t *uc, struct reg *r) 48 { 49 memcpy(&r->r_fs, &uc->uc_mcontext.mc_fs, 18*4); 50 r->r_gs = uc->uc_mcontext.mc_gs; 51 } 52 53 void 54 pt_fpreg_to_ucontext(const struct fpreg* r, ucontext_t *uc) 55 { 56 if (!has_xmm_regs) 57 memcpy(&uc->uc_mcontext.mc_fpstate, r, 58 sizeof(struct save87)); 59 else { 60 int i; 61 struct savexmm *sx = (struct savexmm *)&uc->uc_mcontext.mc_fpstate; 62 memcpy(&sx->sv_env, &r->fpr_env, sizeof(r->fpr_env)); 63 for (i = 0; i < 8; ++i) 64 memcpy(&sx->sv_fp[i].fp_acc, &r->fpr_acc[i], 10); 65 } 66 } 67 68 void 69 pt_ucontext_to_fpreg(const ucontext_t *uc, struct fpreg *r) 70 { 71 if (!has_xmm_regs) 72 memcpy(r, &uc->uc_mcontext.mc_fpstate, sizeof(struct save87)); 73 else { 74 int i; 75 const struct savexmm *sx = (const struct savexmm *)&uc->uc_mcontext.mc_fpstate; 76 memcpy(&r->fpr_env, &sx->sv_env, sizeof(r->fpr_env)); 77 for (i = 0; i < 8; ++i) 78 memcpy(&r->fpr_acc[i], &sx->sv_fp[i].fp_acc, 10); 79 } 80 } 81 82 void 83 pt_fxsave_to_ucontext(const char* r, ucontext_t *uc) 84 { 85 if (has_xmm_regs) 86 memcpy(&uc->uc_mcontext.mc_fpstate, r, sizeof(struct savexmm)); 87 } 88 89 void 90 pt_ucontext_to_fxsave(const ucontext_t *uc, char *r) 91 { 92 if (has_xmm_regs) 93 memcpy(r, &uc->uc_mcontext.mc_fpstate, sizeof(struct savexmm)); 94 } 95 96 void 97 pt_md_init(void) 98 { 99 ucontext_t uc; 100 101 getcontext(&uc); 102 if (uc.uc_mcontext.mc_fpformat == _MC_FPFMT_XMM) 103 has_xmm_regs = 1; 104 } 105 106 int 107 pt_reg_sstep(struct reg *reg, int step) 108 { 109 unsigned int old; 110 111 old = reg->r_eflags; 112 if (step) 113 reg->r_eflags |= 0x0100; 114 else 115 reg->r_eflags &= ~0x0100; 116 return (old != reg->r_eflags); /* changed ? */ 117 } 118 119