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Add support for XMM registers in GDB for x86 processors that support

Browse Source 
SSE (or its successors).

Reviewed by: marcel, davidxu
MFC After: 2 weeks
This commit is contained in:
Doug Rabson 2005-05-31 09:43:04 +00:00
parent 3d7f65df6e
commit 8d7681bb7f
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=146818
15 changed files with 404 additions and 13 deletions
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2
gnu/usr.bin/gdb/arch/i386/config.h
View File

@ -162,7 +162,7 @@
#define HAVE_PT_GETDBREGS 1
/* Define if <sys/ptrace.h> defines the PT_GETXMMREGS request. */
/* #undef HAVE_PT_GETXMMREGS */
#define HAVE_PT_GETXMMREGS
/* Define if libunwind library is being used. */
/* #undef HAVE_LIBUNWIND */

122
gnu/usr.bin/gdb/libgdb/fbsd-threads.c
View File

@ -110,10 +110,18 @@ static td_err_e (*td_ta_event_getmsg_p) (const td_thragent_t *ta,
td_event_msg_t *msg);
static td_err_e (*td_thr_get_info_p) (const td_thrhandle_t *th,
td_thrinfo_t *infop);
#ifdef PT_GETXMMREGS
static td_err_e (*td_thr_getxmmregs_p) (const td_thrhandle_t *th,
char *regset);
#endif
static td_err_e (*td_thr_getfpregs_p) (const td_thrhandle_t *th,
prfpregset_t *regset);
static td_err_e (*td_thr_getgregs_p) (const td_thrhandle_t *th,
prgregset_t gregs);
#ifdef PT_GETXMMREGS
static td_err_e (*td_thr_setxmmregs_p) (const td_thrhandle_t *th,
const char *fpregs);
#endif
static td_err_e (*td_thr_setfpregs_p) (const td_thrhandle_t *th,
const prfpregset_t *fpregs);
static td_err_e (*td_thr_setgregs_p) (const td_thrhandle_t *th,
@ -786,6 +794,9 @@ fbsd_lwp_fetch_registers (int regno)
gregset_t gregs;
fpregset_t fpregs;
lwpid_t lwp;
#ifdef PT_GETXMMREGS
char xmmregs[512];
#endif
if (!target_has_execution)
{
@ -800,10 +811,20 @@ fbsd_lwp_fetch_registers (int regno)
error ("Cannot get lwp %d registers: %s\n", lwp, safe_strerror (errno));
supply_gregset (&gregs);
if (ptrace (PT_GETFPREGS, lwp, (caddr_t) &fpregs, 0) == -1)
error ("Cannot get lwp %d registers: %s\n ", lwp, safe_strerror (errno));
supply_fpregset (&fpregs);
#ifdef PT_GETXMMREGS
if (ptrace (PT_GETXMMREGS, lwp, xmmregs, 0) == 0)
{
i387_supply_fxsave (current_regcache, -1, xmmregs);
}
else
{
#endif
if (ptrace (PT_GETFPREGS, lwp, (caddr_t) &fpregs, 0) == -1)
error ("Cannot get lwp %d registers: %s\n ", lwp, safe_strerror (errno));
supply_fpregset (&fpregs);
#ifdef PT_GETXMMREGS
}
#endif
}
static void
@ -813,6 +834,9 @@ fbsd_thread_fetch_registers (int regno)
prfpregset_t fpregset;
td_thrhandle_t th;
td_err_e err;
#ifdef PT_GETXMMREGS
char xmmregs[512];
#endif
if (!IS_THREAD (inferior_ptid))
{
@ -831,15 +855,26 @@ fbsd_thread_fetch_registers (int regno)
error ("Cannot fetch general-purpose registers for thread %d: Thread ID=%ld, %s",
pid_to_thread_id (inferior_ptid),
GET_THREAD (inferior_ptid), thread_db_err_str (err));
err = td_thr_getfpregs_p (&th, &fpregset);
if (err != TD_OK)
error ("Cannot get floating-point registers for thread %d: Thread ID=%ld, %s",
pid_to_thread_id (inferior_ptid),
GET_THREAD (inferior_ptid), thread_db_err_str (err));
#ifdef PT_GETXMMREGS
err = td_thr_getxmmregs_p (&th, xmmregs);
if (err == TD_OK)
{
i387_supply_fxsave (current_regcache, -1, xmmregs);
}
else
{
#endif
err = td_thr_getfpregs_p (&th, &fpregset);
if (err != TD_OK)
error ("Cannot get floating-point registers for thread %d: Thread ID=%ld, %s",
pid_to_thread_id (inferior_ptid),
GET_THREAD (inferior_ptid), thread_db_err_str (err));
supply_fpregset (&fpregset);
#ifdef PT_GETXMMREGS
}
#endif
supply_gregset (gregset);
supply_fpregset (&fpregset);
}
static void
@ -848,6 +883,9 @@ fbsd_lwp_store_registers (int regno)
gregset_t gregs;
fpregset_t fpregs;
lwpid_t lwp;
#ifdef PT_GETXMMREGS
char xmmregs[512];
#endif
/* FIXME, is it possible ? */
if (!IS_LWP (inferior_ptid))
@ -865,6 +903,20 @@ fbsd_lwp_store_registers (int regno)
if (ptrace (PT_SETREGS, lwp, (caddr_t) &gregs, 0) == -1)
error ("Cannot set lwp %d registers: %s\n", lwp, safe_strerror (errno));
#ifdef PT_GETXMMREGS
if (regno != -1)
if (ptrace (PT_GETXMMREGS, lwp, xmmregs, 0) == -1)
goto noxmm;
i387_fill_fxsave (xmmregs, regno);
if (ptrace (PT_SETXMMREGS, lwp, xmmregs, 0) == -1)
goto noxmm;
return;
noxmm:
#endif
if (regno != -1)
if (ptrace (PT_GETFPREGS, lwp, (caddr_t) &fpregs, 0) == -1)
error ("Cannot get lwp %d float registers: %s\n", lwp,
@ -883,6 +935,9 @@ fbsd_thread_store_registers (int regno)
prfpregset_t fpregset;
td_thrhandle_t th;
td_err_e err;
#ifdef PT_GETXMMREGS
char xmmregs[512];
#endif
if (!IS_THREAD (inferior_ptid))
{
@ -913,12 +968,22 @@ fbsd_thread_store_registers (int regno)
fill_gregset (gregset, regno);
fill_fpregset (&fpregset, regno);
#ifdef PT_GETXMMREGS
i387_fill_fxsave (xmmregs, regno);
#endif
err = td_thr_setgregs_p (&th, gregset);
if (err != TD_OK)
error ("Cannot store general-purpose registers for thread %d: Thread ID=%d, %s",
pid_to_thread_id (inferior_ptid), GET_THREAD (inferior_ptid),
thread_db_err_str (err));
#ifdef PT_GETXMMREGS
err = td_thr_setxmmregs_p (&th, xmmregs);
if (err == TD_OK)
return;
#endif
err = td_thr_setfpregs_p (&th, &fpregset);
if (err != TD_OK)
error ("Cannot store floating-point registers for thread %d: Thread ID=%d, %s",
@ -1351,8 +1416,14 @@ thread_db_load (void)
resolve(td_ta_map_lwp2thr);
resolve(td_ta_thr_iter);
resolve(td_thr_get_info);
#ifdef PT_GETXMMREGS
resolve(td_thr_getxmmregs);
#endif
resolve(td_thr_getfpregs);
resolve(td_thr_getgregs);
#ifdef PT_GETXMMREGS
resolve(td_thr_setxmmregs);
#endif
resolve(td_thr_setfpregs);
resolve(td_thr_setgregs);
resolve(td_thr_sstep);
@ -1518,6 +1589,35 @@ ps_lsetfpregs (struct ps_prochandle *ph, lwpid_t lwpid,
return PS_OK;
}
#ifdef PT_GETXMMREGS
ps_err_e
ps_lgetxmmregs (struct ps_prochandle *ph, lwpid_t lwpid, char *xmmregs)
{
struct cleanup *old_chain;
old_chain = save_inferior_ptid ();
inferior_ptid = BUILD_LWP (lwpid, PIDGET (inferior_ptid));
target_fetch_registers (-1);
i387_fill_fxsave (xmmregs, -1);
do_cleanups (old_chain);
return PS_OK;
}
ps_err_e
ps_lsetxmmregs (struct ps_prochandle *ph, lwpid_t lwpid,
const char *xmmregs)
{
struct cleanup *old_chain;
old_chain = save_inferior_ptid ();
inferior_ptid = BUILD_LWP (lwpid, PIDGET (inferior_ptid));
i387_supply_fxsave (current_regcache, -1, xmmregs);
target_store_registers (-1);
do_cleanups (old_chain);
return PS_OK;
}
#endif
ps_err_e
ps_lstop(struct ps_prochandle *ph, lwpid_t lwpid)
{

4
include/proc_service.h
View File

@ -51,6 +51,10 @@ ps_err_e ps_lgetfpregs(struct ps_prochandle *, lwpid_t, prfpregset_t *);
ps_err_e ps_lgetregs(struct ps_prochandle *, lwpid_t, prgregset_t);
ps_err_e ps_lsetfpregs(struct ps_prochandle *, lwpid_t, const prfpregset_t *);
ps_err_e ps_lsetregs(struct ps_prochandle *, lwpid_t, const prgregset_t);
#ifdef __i386__
ps_err_e ps_lgetxmmregs (struct ps_prochandle *, lwpid_t, char *);
ps_err_e ps_lsetxmmregs (struct ps_prochandle *, lwpid_t, const char *);
#endif
ps_err_e ps_lstop(struct ps_prochandle *, lwpid_t);
ps_err_e ps_pcontinue(struct ps_prochandle *);
ps_err_e ps_pdmodel(struct ps_prochandle *, int *);

14
lib/libthread_db/arch/i386/libpthread_md.c
View File

@ -80,6 +80,20 @@ pt_ucontext_to_fpreg(const ucontext_t *uc, struct fpreg *r)
}
}
void
pt_fxsave_to_ucontext(const char* r, ucontext_t *uc)
{
if (has_xmm_regs)
memcpy(&uc->uc_mcontext.mc_fpstate, r, sizeof(struct savexmm));
}
void
pt_ucontext_to_fxsave(const ucontext_t *uc, char *r)
{
if (has_xmm_regs)
memcpy(r, &uc->uc_mcontext.mc_fpstate, sizeof(struct savexmm));
}
void
pt_md_init(void)
{

22
lib/libthread_db/libc_r_db.c
View File

@ -228,6 +228,14 @@ libc_r_db_thr_get_info(const td_thrhandle_t *th, td_thrinfo_t *ti)
return ((err == PS_OK) ? TD_OK : TD_ERR);
}
#ifdef __i386__
static td_err_e
libc_r_db_thr_getxmmregs(const td_thrhandle_t *th, char *fxsave)
{
return (TD_NOFPREGS);
}
#endif
static td_err_e
libc_r_db_thr_getfpregs(const td_thrhandle_t *th, prfpregset_t *r)
{
@ -284,6 +292,14 @@ libc_r_db_thr_set_event(const td_thrhandle_t *th, td_thr_events_t *ev)
return (0);
}
#ifdef __i386__
static td_err_e
libc_r_db_thr_setxmmregs(const td_thrhandle_t *th, const char *fxsave)
{
return (TD_NOFPREGS);
}
#endif
static td_err_e
libc_r_db_thr_setfpregs(const td_thrhandle_t *th, const prfpregset_t *r)
{
@ -324,5 +340,9 @@ struct ta_ops libc_r_db_ops = {
.to_thr_set_event = libc_r_db_thr_set_event,
.to_thr_setfpregs = libc_r_db_thr_setfpregs,
.to_thr_setgregs = libc_r_db_thr_setgregs,
.to_thr_validate = libc_r_db_thr_validate
.to_thr_validate = libc_r_db_thr_validate,
#ifdef __i386__
.to_thr_getxmmregs = libc_r_db_thr_getxmmregs,
.to_thr_setxmmregs = libc_r_db_thr_setxmmregs,
#endif
};

100
lib/libthread_db/libpthread_db.c
View File

@ -641,6 +641,51 @@ pt_thr_get_info(const td_thrhandle_t *th, td_thrinfo_t *info)
return (0);
}
#ifdef __i386__
static td_err_e
pt_thr_getxmmregs(const td_thrhandle_t *th, char *fxsave)
{
const td_thragent_t *ta = th->th_ta;
struct kse_thr_mailbox tmbx;
psaddr_t tcb_addr, tmbx_addr, ptr;
lwpid_t lwp;
int ret;
return TD_ERR;
TDBG_FUNC();
ret = pt_validate(th);
if (ret)
return (ret);
if (ta->map[th->th_tid].type == PT_LWP) {
ret = ps_lgetxmmregs(ta->ph, ta->map[th->th_tid].lwp, fxsave);
return (P2T(ret));
}
ret = ps_pread(ta->ph, ta->map[th->th_tid].thr + ta->thread_off_tcb,
&tcb_addr, sizeof(tcb_addr));
if (ret != 0)
return (P2T(ret));
tmbx_addr = tcb_addr + ta->thread_off_tmbx;
ptr = tmbx_addr + offsetof(struct kse_thr_mailbox, tm_lwp);
ret = ps_pread(ta->ph, ptr, &lwp, sizeof(lwpid_t));
if (ret != 0)
return (P2T(ret));
if (lwp != 0) {
ret = ps_lgetxmmregs(ta->ph, lwp, fxsave);
return (P2T(ret));
}
ret = ps_pread(ta->ph, tmbx_addr, &tmbx, sizeof(tmbx));
if (ret != 0)
return (P2T(ret));
pt_ucontext_to_fxsave(&tmbx.tm_context, fxsave);
return (0);
}
#endif
static td_err_e
pt_thr_getfpregs(const td_thrhandle_t *th, prfpregset_t *fpregs)
{
@ -723,6 +768,57 @@ pt_thr_getgregs(const td_thrhandle_t *th, prgregset_t gregs)
return (0);
}
#ifdef __i386__
static td_err_e
pt_thr_setxmmregs(const td_thrhandle_t *th, const char *fxsave)
{
const td_thragent_t *ta = th->th_ta;
struct kse_thr_mailbox tmbx;
psaddr_t tcb_addr, tmbx_addr, ptr;
lwpid_t lwp;
int ret;
return TD_ERR;
TDBG_FUNC();
ret = pt_validate(th);
if (ret)
return (ret);
if (ta->map[th->th_tid].type == PT_LWP) {
ret = ps_lsetxmmregs(ta->ph, ta->map[th->th_tid].lwp, fxsave);
return (P2T(ret));
}
ret = ps_pread(ta->ph, ta->map[th->th_tid].thr +
ta->thread_off_tcb,
&tcb_addr, sizeof(tcb_addr));
if (ret != 0)
return (P2T(ret));
tmbx_addr = tcb_addr + ta->thread_off_tmbx;
ptr = tmbx_addr + offsetof(struct kse_thr_mailbox, tm_lwp);
ret = ps_pread(ta->ph, ptr, &lwp, sizeof(lwpid_t));
if (ret != 0)
return (P2T(ret));
if (lwp != 0) {
ret = ps_lsetxmmregs(ta->ph, lwp, fxsave);
return (P2T(ret));
}
/*
* Read a copy of context, this makes sure that registers
* not covered by structure reg won't be clobbered
*/
ret = ps_pread(ta->ph, tmbx_addr, &tmbx, sizeof(tmbx));
if (ret != 0)
return (P2T(ret));
pt_fxsave_to_ucontext(fxsave, &tmbx.tm_context);
ret = ps_pwrite(ta->ph, tmbx_addr, &tmbx, sizeof(tmbx));
return (P2T(ret));
}
#endif
static td_err_e
pt_thr_setfpregs(const td_thrhandle_t *th, const prfpregset_t *fpregs)
{
@ -1009,4 +1105,8 @@ struct ta_ops libpthread_db_ops = {
/* FreeBSD specific extensions. */
.to_thr_sstep = pt_thr_sstep,
#ifdef __i386__
.to_thr_getxmmregs = pt_thr_getxmmregs,
.to_thr_setxmmregs = pt_thr_setxmmregs,
#endif
};

4
lib/libthread_db/libpthread_db.h
View File

@ -82,6 +82,10 @@ void pt_reg_to_ucontext(const struct reg *, ucontext_t *);
void pt_ucontext_to_reg(const ucontext_t *, struct reg *);
void pt_fpreg_to_ucontext(const struct fpreg *, ucontext_t *);
void pt_ucontext_to_fpreg(const ucontext_t *, struct fpreg *);
#ifdef __i386__
void pt_fxsave_to_ucontext(const char *, ucontext_t *);
void pt_ucontext_to_fxsave(const ucontext_t *, char *);
#endif
int pt_reg_sstep(struct reg *reg, int step);
#endif /* _LIBPTHREAD_DB_H_ */

40
lib/libthread_db/libthr_db.c
View File

@ -505,6 +505,24 @@ pt_thr_get_info(const td_thrhandle_t *th, td_thrinfo_t *info)
return (0);
}
#ifdef __i386__
static td_err_e
pt_thr_getxmmregs(const td_thrhandle_t *th, char *fxsave)
{
const td_thragent_t *ta = th->th_ta;
int ret;
TDBG_FUNC();
ret = pt_validate(th);
if (ret)
return (ret);
ret = ps_lgetxmmregs(ta->ph, th->th_tid, fxsave);
return (P2T(ret));
}
#endif
static td_err_e
pt_thr_getfpregs(const td_thrhandle_t *th, prfpregset_t *fpregs)
{
@ -537,6 +555,24 @@ pt_thr_getgregs(const td_thrhandle_t *th, prgregset_t gregs)
return (P2T(ret));
}
#ifdef __i386__
static td_err_e
pt_thr_setxmmregs(const td_thrhandle_t *th, const char *fxsave)
{
const td_thragent_t *ta = th->th_ta;
int ret;
TDBG_FUNC();
ret = pt_validate(th);
if (ret)
return (ret);
ret = ps_lsetxmmregs(ta->ph, th->th_tid, fxsave);
return (P2T(ret));
}
#endif
static td_err_e
pt_thr_setfpregs(const td_thrhandle_t *th, const prfpregset_t *fpregs)
{
@ -742,4 +778,8 @@ struct ta_ops libthr_db_ops = {
/* FreeBSD specific extensions. */
.to_thr_sstep = pt_thr_sstep,
#ifdef __i386__
.to_thr_getxmmregs = pt_thr_getxmmregs,
.to_thr_setxmmregs = pt_thr_setxmmregs,
#endif
};

19
lib/libthread_db/thread_db.c
View File

@ -184,6 +184,16 @@ td_thr_get_info(const td_thrhandle_t *th, td_thrinfo_t *info)
return (ta->ta_ops->to_thr_get_info(th, info));
}
#ifdef __i386__
td_err_e
td_thr_getxmmregs(const td_thrhandle_t *th, char *fxsave)
{
const td_thragent_t *ta = th->th_ta;
return (ta->ta_ops->to_thr_getxmmregs(th, fxsave));
}
#endif
td_err_e
td_thr_getfpregs(const td_thrhandle_t *th, prfpregset_t *fpregset)
{
@ -205,6 +215,15 @@ td_thr_set_event(const td_thrhandle_t *th, td_thr_events_t *events)
return (ta->ta_ops->to_thr_set_event(th, events));
}
#ifdef __i386__
td_err_e
td_thr_setxmmregs(const td_thrhandle_t *th, const char *fxsave)
{
const td_thragent_t *ta = th->th_ta;
return (ta->ta_ops->to_thr_setxmmregs(th, fxsave));
}
#endif
td_err_e
td_thr_setfpregs(const td_thrhandle_t *th, const prfpregset_t *fpregs)
{

6
lib/libthread_db/thread_db.h
View File

@ -227,9 +227,15 @@ td_err_e td_thr_dbsuspend(const td_thrhandle_t *);
td_err_e td_thr_event_enable(const td_thrhandle_t *, int);
td_err_e td_thr_event_getmsg(const td_thrhandle_t *, td_event_msg_t *);
td_err_e td_thr_get_info(const td_thrhandle_t *, td_thrinfo_t *);
#ifdef __i386__
td_err_e td_thr_getxmmregs(const td_thrhandle_t *, char *);
#endif
td_err_e td_thr_getfpregs(const td_thrhandle_t *, prfpregset_t *);
td_err_e td_thr_getgregs(const td_thrhandle_t *, prgregset_t);
td_err_e td_thr_set_event(const td_thrhandle_t *, td_thr_events_t *);
#ifdef __i386__
td_err_e td_thr_setxmmregs(const td_thrhandle_t *, const char *);
#endif
td_err_e td_thr_setfpregs(const td_thrhandle_t *, const prfpregset_t *);
td_err_e td_thr_setgregs(const td_thrhandle_t *, const prgregset_t);
td_err_e td_thr_validate(const td_thrhandle_t *);

4
lib/libthread_db/thread_db_int.h
View File

@ -79,6 +79,10 @@ struct ta_ops {
/* FreeBSD specific extensions. */
td_err_e (*to_thr_sstep)(const td_thrhandle_t *, int);
#if defined(__i386__)
td_err_e (*to_thr_getxmmregs)(const td_thrhandle_t *, char *);
td_err_e (*to_thr_setxmmregs)(const td_thrhandle_t *, const char *);
#endif
};
#ifdef TD_DEBUG

1
sys/conf/files.i386
View File

@ -293,6 +293,7 @@ i386/i386/nexus.c standard
i386/i386/perfmon.c optional perfmon
i386/i386/perfmon.c optional perfmon profiling-routine
i386/i386/pmap.c standard
i386/i386/ptrace_machdep.c standard
i386/i386/support.s standard
i386/i386/swtch.s standard
i386/i386/sys_machdep.c standard

62
sys/i386/i386/ptrace_machdep.c Normal file
View File

@ -0,0 +1,62 @@
/*-
* Copyright (c) 2005 Doug Rabson
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/ptrace.h>
#include <machine/md_var.h>
#include <machine/pcb.h>
int
cpu_ptrace(struct thread *td, int req, void *addr, int data)
{
int error;
if (!cpu_fxsr)
return (EINVAL);
switch (req) {
case PT_GETXMMREGS:
error = copyout(&td->td_pcb->pcb_save.sv_xmm, addr,
sizeof(td->td_pcb->pcb_save.sv_xmm));
break;
case PT_SETXMMREGS:
error = copyin(addr, &td->td_pcb->pcb_save.sv_xmm,
sizeof(td->td_pcb->pcb_save.sv_xmm));
break;
default:
return (EINVAL);
}
return (error);
}

5
sys/i386/include/ptrace.h
View File

@ -33,4 +33,9 @@
#ifndef _MACHINE_PTRACE_H_
#define _MACHINE_PTRACE_H_
#define __HAVE_PTRACE_MACHDEP
#define PT_GETXMMREGS (PT_FIRSTMACH + 0)
#define PT_SETXMMREGS (PT_FIRSTMACH + 1)
#endif

12
sys/i386/include/reg.h
View File

@ -114,6 +114,18 @@ struct fpreg {
unsigned char fpr_pad[64];
};
struct xmmreg {
/*
* XXX should get struct from npx.h. Here we give a slightly
* simplified struct. This may be too much detail. Perhaps
* an array of unsigned longs is best.
*/
unsigned long xmm_env[8];
unsigned char xmm_acc[8][16];
unsigned char xmm_reg[8][16];
unsigned char xmm_pad[224];
};
/*
* Register set accessible via /proc/$pid/dbregs.
*/