119 lines
3.2 KiB
C
119 lines
3.2 KiB
C
/*
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* Copyright (c) 2004 David Xu <davidxu@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <machine/npx.h>
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#include <string.h>
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#include <thread_db.h>
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#include "libpthread_db.h"
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static int has_xmm_regs;
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void
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pt_reg_to_ucontext(const struct reg *r, ucontext_t *uc)
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{
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memcpy(&uc->uc_mcontext.mc_fs, &r->r_fs, 18*4);
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uc->uc_mcontext.mc_gs = r->r_gs;
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}
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void
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pt_ucontext_to_reg(const ucontext_t *uc, struct reg *r)
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{
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memcpy(&r->r_fs, &uc->uc_mcontext.mc_fs, 18*4);
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r->r_gs = uc->uc_mcontext.mc_gs;
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}
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void
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pt_fpreg_to_ucontext(const struct fpreg* r, ucontext_t *uc)
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{
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if (!has_xmm_regs)
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memcpy(&uc->uc_mcontext.mc_fpstate, r,
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sizeof(struct save87));
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else {
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int i;
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struct savexmm *sx = (struct savexmm *)&uc->uc_mcontext.mc_fpstate;
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memcpy(&sx->sv_env, &r->fpr_env, sizeof(r->fpr_env));
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for (i = 0; i < 8; ++i)
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memcpy(&sx->sv_fp[i].fp_acc, &r->fpr_acc[i], 10);
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}
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}
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void
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pt_ucontext_to_fpreg(const ucontext_t *uc, struct fpreg *r)
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{
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if (!has_xmm_regs)
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memcpy(r, &uc->uc_mcontext.mc_fpstate, sizeof(struct save87));
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else {
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int i;
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const struct savexmm *sx = (const struct savexmm *)&uc->uc_mcontext.mc_fpstate;
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memcpy(&r->fpr_env, &sx->sv_env, sizeof(r->fpr_env));
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for (i = 0; i < 8; ++i)
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memcpy(&r->fpr_acc[i], &sx->sv_fp[i].fp_acc, 10);
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}
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}
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void
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pt_fxsave_to_ucontext(const char* r, ucontext_t *uc)
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{
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if (has_xmm_regs)
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memcpy(&uc->uc_mcontext.mc_fpstate, r, sizeof(struct savexmm));
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}
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void
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pt_ucontext_to_fxsave(const ucontext_t *uc, char *r)
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{
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if (has_xmm_regs)
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memcpy(r, &uc->uc_mcontext.mc_fpstate, sizeof(struct savexmm));
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}
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void
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pt_md_init(void)
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{
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ucontext_t uc;
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getcontext(&uc);
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if (uc.uc_mcontext.mc_fpformat == _MC_FPFMT_XMM)
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has_xmm_regs = 1;
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}
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int
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pt_reg_sstep(struct reg *reg, int step)
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{
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unsigned int old;
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old = reg->r_eflags;
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if (step)
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reg->r_eflags |= 0x0100;
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else
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reg->r_eflags &= ~0x0100;
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return (old != reg->r_eflags); /* changed ? */
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}
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