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/types.h> 30 #include <machine/npx.h> 31 #include <string.h> 32 #include <thread_db.h> 33 34 #include "libpthread_db.h" 35 36 static int has_xmm_regs; 37 38 void 39 pt_reg_to_ucontext(const struct reg *r, ucontext_t *uc) 40 { 41 memcpy(&uc->uc_mcontext.mc_fs, &r->r_fs, 18*4); 42 uc->uc_mcontext.mc_gs = r->r_gs; 43 } 44 45 void 46 pt_ucontext_to_reg(const ucontext_t *uc, struct reg *r) 47 { 48 memcpy(&r->r_fs, &uc->uc_mcontext.mc_fs, 18*4); 49 r->r_gs = uc->uc_mcontext.mc_gs; 50 } 51 52 void 53 pt_fpreg_to_ucontext(const struct fpreg* r, ucontext_t *uc) 54 { 55 if (!has_xmm_regs) 56 memcpy(&uc->uc_mcontext.mc_fpstate, r, 57 sizeof(struct save87)); 58 else { 59 int i; 60 struct savexmm *sx = (struct savexmm *)&uc->uc_mcontext.mc_fpstate; 61 memcpy(&sx->sv_env, &r->fpr_env, sizeof(r->fpr_env)); 62 for (i = 0; i < 8; ++i) 63 memcpy(&sx->sv_fp[i].fp_acc, &r->fpr_acc[i], 10); 64 } 65 } 66 67 void 68 pt_ucontext_to_fpreg(const ucontext_t *uc, struct fpreg *r) 69 { 70 if (!has_xmm_regs) 71 memcpy(r, &uc->uc_mcontext.mc_fpstate, sizeof(struct save87)); 72 else { 73 int i; 74 const struct savexmm *sx = (const struct savexmm *)&uc->uc_mcontext.mc_fpstate; 75 memcpy(&r->fpr_env, &sx->sv_env, sizeof(r->fpr_env)); 76 for (i = 0; i < 8; ++i) 77 memcpy(&r->fpr_acc[i], &sx->sv_fp[i].fp_acc, 10); 78 } 79 } 80 81 void 82 pt_fxsave_to_ucontext(const char* r, ucontext_t *uc) 83 { 84 if (has_xmm_regs) 85 memcpy(&uc->uc_mcontext.mc_fpstate, r, sizeof(struct savexmm)); 86 } 87 88 void 89 pt_ucontext_to_fxsave(const ucontext_t *uc, char *r) 90 { 91 if (has_xmm_regs) 92 memcpy(r, &uc->uc_mcontext.mc_fpstate, sizeof(struct savexmm)); 93 } 94 95 void 96 pt_md_init(void) 97 { 98 ucontext_t uc; 99 100 getcontext(&uc); 101 if (uc.uc_mcontext.mc_fpformat == _MC_FPFMT_XMM) 102 has_xmm_regs = 1; 103 } 104 105 int 106 pt_reg_sstep(struct reg *reg, int step) 107 { 108 unsigned int old; 109 110 old = reg->r_eflags; 111 if (step) 112 reg->r_eflags |= 0x0100; 113 else 114 reg->r_eflags &= ~0x0100; 115 return (old != reg->r_eflags); /* changed ? */ 116 } 117 118