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Convert syscall to trapframe. Based on work done by John Brezak.

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This commit is contained in:
David Greenman 1994-01-03 07:55:47 +00:00
parent f7d757443b
commit c8a13ecd00
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=924
24 changed files with 445 additions and 760 deletions
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93
sys/amd64/amd64/db_trace.c
View file

@ -23,7 +23,7 @@
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*
* $Id: db_trace.c,v 1.2 1993/10/16 14:14:56 rgrimes Exp $
* $Id: db_trace.c,v 1.3 1993/12/19 00:50:01 wollman Exp $
*/
#include "param.h"
@ -73,8 +73,10 @@ struct i386_frame {
#define TRAP 1
#define INTERRUPT 2
#define SYSCALL 3
db_addr_t db_trap_symbol_value = 0;
db_addr_t db_syscall_symbol_value = 0;
db_addr_t db_kdintr_symbol_value = 0;
boolean_t db_trace_symbols_found = FALSE;
@ -86,6 +88,8 @@ db_find_trace_symbols()
db_trap_symbol_value = (db_addr_t) value;
if (db_value_of_name("_kdintr", &value))
db_kdintr_symbol_value = (db_addr_t) value;
if (db_value_of_name("_syscall", &value))
db_syscall_symbol_value = (db_addr_t) value;
db_trace_symbols_found = TRUE;
}
@ -135,26 +139,43 @@ db_nextframe(fp, ip, argp, is_trap)
{
struct i386_saved_state *saved_regs;
if (is_trap == 0) {
switch (is_trap) {
case 0:
*ip = (db_addr_t)
db_get_value((int) &(*fp)->f_retaddr, 4, FALSE);
*fp = (struct i386_frame *)
db_get_value((int) &(*fp)->f_frame, 4, FALSE);
} else {
break;
case TRAP:
default:
/*
* We know that trap() has 1 argument and we know that
* it is an (int *).
*/
#if 0
saved_regs = (struct i386_saved_state *)
db_get_value((int)argp, 4, FALSE);
#endif
saved_regs = (struct i386_saved_state *)argp;
db_printf("--- trap (number %d) ---\n",
saved_regs->tf_trapno & 0xffff);
db_printsym(saved_regs->tf_eip, DB_STGY_XTRN);
db_printf(":\n");
*fp = (struct i386_frame *)saved_regs->tf_ebp;
*ip = (db_addr_t)saved_regs->tf_eip;
}
break;
case SYSCALL: {
struct trapframe *saved_regs = (struct trapframe *)argp;
db_printf("--- syscall (number %d) ---\n", saved_regs->tf_eax);
db_printsym(saved_regs->tf_eip, DB_STGY_XTRN);
db_printf(":\n");
*fp = (struct i386_frame *)saved_regs->tf_ebp;
*ip = (db_addr_t)saved_regs->tf_eip;
}
break;
}
}
void
@ -171,8 +192,10 @@ db_stack_trace_cmd(addr, have_addr, count, modif)
boolean_t kernel_only = TRUE;
boolean_t trace_thread = FALSE;
#if 0
if (!db_trace_symbols_found)
db_find_trace_symbols();
#endif
{
register char *cp = modif;
@ -203,38 +226,84 @@ db_stack_trace_cmd(addr, have_addr, count, modif)
lastframe = 0;
while (count-- && frame != 0) {
register int narg;
int narg;
char * name;
db_expr_t offset;
db_sym_t sym;
#define MAXNARG 16
char *argnames[MAXNARG], **argnp = NULL;
if (INKERNEL((int)frame) && callpc == db_trap_symbol_value) {
sym = db_search_symbol(callpc, DB_STGY_ANY, &offset);
db_symbol_values(sym, &name, NULL);
if (lastframe == 0 && sym == NULL) {
/* Symbol not found, peek at code */
int instr = db_get_value(callpc, 4, FALSE);
offset = 1;
if ((instr & 0x00ffffff) == 0x00e58955 ||
/* enter: pushl %ebp, movl %esp, %ebp */
(instr & 0x0000ffff) == 0x0000e589
/* enter+1: movl %esp, %ebp */ ) {
offset = 0;
}
}
#define STRCMP(s1,s2) ((s1) && (s2) && strcmp((s1), (s2)) == 0)
if (INKERNEL((int)frame) && STRCMP(name, "_trap")) {
narg = 1;
is_trap = TRAP;
}
else
if (INKERNEL((int)frame) && callpc == db_kdintr_symbol_value) {
if (INKERNEL((int)frame) && STRCMP(name, "_kdintr")) {
is_trap = INTERRUPT;
narg = 0;
}
else
if (INKERNEL((int)frame) && STRCMP(name, "_syscall")) {
is_trap = SYSCALL;
narg = 0;
}
#undef STRCMP
else {
is_trap = 0;
narg = db_numargs(frame);
narg = MAXNARG;
if (db_sym_numargs(sym, &narg, argnames)) {
argnp = argnames;
} else {
narg = db_numargs(frame);
}
}
db_find_sym_and_offset(callpc, &name, &offset);
db_printf("%s(", name);
argp = &frame->f_arg0;
if (lastframe == 0 && offset == 0 && !have_addr) {
/*
* We have a breakpoint before the frame is set up
* Use %esp instead
*/
argp = &((struct i386_frame *)(ddb_regs.tf_esp-4))->f_arg0;
} else
argp = &frame->f_arg0;
while (narg) {
if (argnp)
db_printf("%s=", *argnp++);
db_printf("%x", db_get_value((int)argp, 4, FALSE));
argp++;
if (--narg != 0)
db_printf(",");
}
db_printf(") at ");
db_printsym(callpc, DB_STGY_XTRN);
db_printsym(callpc, DB_STGY_PROC);
db_printf("\n");
if (lastframe == 0 && offset == 0 && !have_addr) {
/* Frame really belongs to next callpc */
lastframe = (struct i386_frame *)(ddb_regs.tf_esp-4);
callpc = (db_addr_t)db_get_value((int)&lastframe->f_retaddr, 4, FALSE);
continue;
}
lastframe = frame;
db_nextframe(&frame, &callpc, &frame->f_arg0, is_trap);
@ -257,7 +326,7 @@ db_stack_trace_cmd(addr, have_addr, count, modif)
else {
/* in user */
if (frame <= lastframe) {
db_printf("Bad frame pointer: 0x%x\n", frame);
db_printf("Bad user frame pointer: 0x%x\n", frame);
break;
}
}

40
sys/amd64/amd64/exception.S
View file

@ -30,7 +30,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id$
* $Id: exception.s,v 1.1 1993/11/13 02:24:57 davidg Exp $
*/
#include "npx.h" /* NNPX */
@ -181,7 +181,7 @@ calltrap:
* Return through doreti to handle ASTs. Have to change trap frame
* to interrupt frame.
*/
movl $T_ASTFLT,4+4+32(%esp) /* new trap type (err code not used) */
movl $T_ASTFLT,TF_TRAPNO(%esp) /* new trap type (err code not used) */
pushl _cpl
pushl $0 /* dummy unit */
jmp doreti
@ -195,8 +195,8 @@ calltrap:
bpttraps:
pushal
nop
pushl %es
pushl %ds
pushl %es
movl $KDSEL,%eax
movl %ax,%ds
movl %ax,%es
@ -211,38 +211,24 @@ bpttraps:
*/
SUPERALIGN_TEXT
IDTVEC(syscall)
pushfl /* only for stupid carry bit and more stupid wait3 cc kludge */
/* XXX - also for direction flag (bzero, etc. clear it) */
pushal /* only need eax,ecx,edx - trap resaves others */
pushfl /* Room for tf_err */
pushfl /* Room for tf_trapno */
pushal
nop
pushl %ds
pushl %es
movl $KDSEL,%eax /* switch to kernel segments */
movl %ax,%ds
movl %ax,%es
movl TF_ERR(%esp),%eax /* copy eflags from tf_err to fs_eflags */
movl %eax,TF_EFLAGS(%esp)
movl $0,TF_ERR(%esp) /* zero tf_err */
incl _cnt+V_SYSCALL
call _syscall
/*
* Return through doreti to handle ASTs. Have to change syscall frame
* to interrupt frame.
*
* XXX - we should have set up the frame earlier to avoid the
* following popal/pushal (not much can be done to avoid shuffling
* the flags). Consistent frames would simplify things all over.
* Return through doreti to handle ASTs.
*/
movl 32+0(%esp),%eax /* old flags, shuffle to above cs:eip */
movl 32+4(%esp),%ebx /* `int' frame should have been ef, eip, cs */
movl 32+8(%esp),%ecx
movl %ebx,32+0(%esp)
movl %ecx,32+4(%esp)
movl %eax,32+8(%esp)
popal
nop
pushl $0 /* dummy error code */
pushl $T_ASTFLT
pushal
nop
movl __udatasel,%eax /* switch back to user segments */
pushl %eax /* XXX - better to preserve originals? */
pushl %eax
movl $T_ASTFLT,TF_TRAPNO(%esp) /* new trap type (err code not used) */
pushl _cpl
pushl $0
jmp doreti

40
sys/amd64/amd64/exception.s
View file

@ -30,7 +30,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id$
* $Id: exception.s,v 1.1 1993/11/13 02:24:57 davidg Exp $
*/
#include "npx.h" /* NNPX */
@ -181,7 +181,7 @@ calltrap:
* Return through doreti to handle ASTs. Have to change trap frame
* to interrupt frame.
*/
movl $T_ASTFLT,4+4+32(%esp) /* new trap type (err code not used) */
movl $T_ASTFLT,TF_TRAPNO(%esp) /* new trap type (err code not used) */
pushl _cpl
pushl $0 /* dummy unit */
jmp doreti
@ -195,8 +195,8 @@ calltrap:
bpttraps:
pushal
nop
pushl %es
pushl %ds
pushl %es
movl $KDSEL,%eax
movl %ax,%ds
movl %ax,%es
@ -211,38 +211,24 @@ bpttraps:
*/
SUPERALIGN_TEXT
IDTVEC(syscall)
pushfl /* only for stupid carry bit and more stupid wait3 cc kludge */
/* XXX - also for direction flag (bzero, etc. clear it) */
pushal /* only need eax,ecx,edx - trap resaves others */
pushfl /* Room for tf_err */
pushfl /* Room for tf_trapno */
pushal
nop
pushl %ds
pushl %es
movl $KDSEL,%eax /* switch to kernel segments */
movl %ax,%ds
movl %ax,%es
movl TF_ERR(%esp),%eax /* copy eflags from tf_err to fs_eflags */
movl %eax,TF_EFLAGS(%esp)
movl $0,TF_ERR(%esp) /* zero tf_err */
incl _cnt+V_SYSCALL
call _syscall
/*
* Return through doreti to handle ASTs. Have to change syscall frame
* to interrupt frame.
*
* XXX - we should have set up the frame earlier to avoid the
* following popal/pushal (not much can be done to avoid shuffling
* the flags). Consistent frames would simplify things all over.
* Return through doreti to handle ASTs.
*/
movl 32+0(%esp),%eax /* old flags, shuffle to above cs:eip */
movl 32+4(%esp),%ebx /* `int' frame should have been ef, eip, cs */
movl 32+8(%esp),%ecx
movl %ebx,32+0(%esp)
movl %ecx,32+4(%esp)
movl %eax,32+8(%esp)
popal
nop
pushl $0 /* dummy error code */
pushl $T_ASTFLT
pushal
nop
movl __udatasel,%eax /* switch back to user segments */
pushl %eax /* XXX - better to preserve originals? */
pushl %eax
movl $T_ASTFLT,TF_TRAPNO(%esp) /* new trap type (err code not used) */
pushl _cpl
pushl $0
jmp doreti

4
sys/amd64/amd64/fpu.c
View file

@ -32,7 +32,7 @@
* SUCH DAMAGE.
*
* from: @(#)npx.c 7.2 (Berkeley) 5/12/91
* $Id: npx.c,v 1.4 1993/11/03 00:29:19 paul Exp $
* $Id: npx.c,v 1.5 1993/11/03 23:32:35 paul Exp $
*/
#include "npx.h"
@ -439,7 +439,6 @@ npxintr(frame)
* just before it is used).
*/
curproc->p_regs = (int *)&frame.if_es;
curpcb->pcb_flags |= FM_TRAP; /* used by sendsig */
#ifdef notyet
/*
* Encode the appropriate code for detailed information on
@ -450,7 +449,6 @@ npxintr(frame)
code = 0; /* XXX */
#endif
trapsignal(curproc, SIGFPE, code);
curpcb->pcb_flags &= ~FM_TRAP;
} else {
/*
* Nested interrupt. These losers occur when:

274
sys/amd64/amd64/machdep.c
View file

@ -35,7 +35,7 @@
* SUCH DAMAGE.
*
* from: @(#)machdep.c 7.4 (Berkeley) 6/3/91
* $Id: machdep.c,v 1.22 1993/12/19 00:50:03 wollman Exp $
* $Id: machdep.c,v 1.23 1993/12/22 13:12:04 davidg Exp $
*/
#include "npx.h"
@ -418,7 +418,6 @@ sendsig(catcher, sig, mask, code)
regs = p->p_regs;
oonstack = ps->ps_onstack;
frmtrap = curpcb->pcb_flags & FM_TRAP;
/*
* Allocate and validate space for the signal handler
* context. Note that if the stack is in P0 space, the
@ -431,12 +430,8 @@ sendsig(catcher, sig, mask, code)
- sizeof(struct sigframe));
ps->ps_onstack = 1;
} else {
if (frmtrap)
fp = (struct sigframe *)(regs[tESP]
- sizeof(struct sigframe));
else
fp = (struct sigframe *)(regs[sESP]
- sizeof(struct sigframe));
fp = (struct sigframe *)(regs[tESP]
- sizeof(struct sigframe));
}
if (useracc((caddr_t)fp, sizeof (struct sigframe), B_WRITE) == 0) {
@ -463,35 +458,21 @@ sendsig(catcher, sig, mask, code)
fp->sf_handler = catcher;
/* save scratch registers */
if(frmtrap) {
fp->sf_eax = regs[tEAX];
fp->sf_edx = regs[tEDX];
fp->sf_ecx = regs[tECX];
} else {
fp->sf_eax = regs[sEAX];
fp->sf_edx = regs[sEDX];
fp->sf_ecx = regs[sECX];
}
fp->sf_eax = regs[tEAX];
fp->sf_edx = regs[tEDX];
fp->sf_ecx = regs[tECX];
/*
* Build the signal context to be used by sigreturn.
*/
fp->sf_sc.sc_onstack = oonstack;
fp->sf_sc.sc_mask = mask;
if(frmtrap) {
fp->sf_sc.sc_sp = regs[tESP];
fp->sf_sc.sc_fp = regs[tEBP];
fp->sf_sc.sc_pc = regs[tEIP];
fp->sf_sc.sc_ps = regs[tEFLAGS];
regs[tESP] = (int)fp;
regs[tEIP] = (int)((struct pcb *)kstack)->pcb_sigc;
} else {
fp->sf_sc.sc_sp = regs[sESP];
fp->sf_sc.sc_fp = regs[sEBP];
fp->sf_sc.sc_pc = regs[sEIP];
fp->sf_sc.sc_ps = regs[sEFLAGS];
regs[sESP] = (int)fp;
regs[sEIP] = (int)((struct pcb *)kstack)->pcb_sigc;
}
fp->sf_sc.sc_sp = regs[tESP];
fp->sf_sc.sc_fp = regs[tEBP];
fp->sf_sc.sc_pc = regs[tEIP];
fp->sf_sc.sc_ps = regs[tEFLAGS];
regs[tESP] = (int)fp;
regs[tEIP] = (int)((struct pcb *)kstack)->pcb_sigc;
}
/*
@ -519,7 +500,7 @@ sigreturn(p, uap, retval)
register int *regs = p->p_regs;
/*
* (XXX old comment) regs[sESP] points to the return address.
* (XXX old comment) regs[tESP] points to the return address.
* The user scp pointer is above that.
* The return address is faked in the signal trampoline code
* for consistency.
@ -532,9 +513,9 @@ sigreturn(p, uap, retval)
return(EINVAL);
/* restore scratch registers */
regs[sEAX] = fp->sf_eax ;
regs[sEDX] = fp->sf_edx ;
regs[sECX] = fp->sf_ecx ;
regs[tEAX] = fp->sf_eax ;
regs[tEDX] = fp->sf_edx ;
regs[tECX] = fp->sf_ecx ;
if (useracc((caddr_t)scp, sizeof (*scp), 0) == 0)
return(EINVAL);
@ -546,10 +527,10 @@ sigreturn(p, uap, retval)
p->p_sigacts->ps_onstack = scp->sc_onstack & 01;
p->p_sigmask = scp->sc_mask &~
(sigmask(SIGKILL)|sigmask(SIGCONT)|sigmask(SIGSTOP));
regs[sEBP] = scp->sc_fp;
regs[sESP] = scp->sc_sp;
regs[sEIP] = scp->sc_pc;
regs[sEFLAGS] = scp->sc_ps;
regs[tEBP] = scp->sc_fp;
regs[tESP] = scp->sc_sp;
regs[tEIP] = scp->sc_pc;
regs[tEFLAGS] = scp->sc_ps;
return(EJUSTRETURN);
}
@ -762,13 +743,18 @@ initcpu()
* Clear registers on exec
*/
void
setregs(p, entry)
setregs(p, entry, stack)
struct proc *p;
u_long entry;
u_long stack;
{
p->p_regs[sEBP] = 0; /* bottom of the fp chain */
p->p_regs[sEIP] = entry;
p->p_regs[tEBP] = 0; /* bottom of the fp chain */
p->p_regs[tEIP] = entry;
p->p_regs[tESP] = stack;
p->p_regs[tSS] = _udatasel;
p->p_regs[tDS] = _udatasel;
p->p_regs[tES] = _udatasel;
p->p_regs[tCS] = _ucodesel;
p->p_addr->u_pcb.pcb_flags = 0; /* no fp at all */
load_cr0(rcr0() | CR0_TS); /* start emulating */
@ -1153,7 +1139,7 @@ init386(first)
x = (int) &IDTVEC(syscall);
gdp->gd_looffset = x++;
gdp->gd_selector = GSEL(GCODE_SEL,SEL_KPL);
gdp->gd_stkcpy = 0;
gdp->gd_stkcpy = 1; /* Leaves room for eflags like a trap */
gdp->gd_type = SDT_SYS386CGT;
gdp->gd_dpl = SEL_UPL;
gdp->gd_p = 1;
@ -1268,35 +1254,24 @@ _remque(element)
int
ptrace_set_pc (struct proc *p, unsigned int addr) {
struct pcb *pcb;
void *regs = (char*)p->p_addr +
((char*) p->p_regs - (char*) kstack);
pcb = &p->p_addr->u_pcb;
if (pcb->pcb_flags & FM_TRAP)
((struct trapframe *)regs)->tf_eip = addr;
else
((struct syscframe *)regs)->sf_eip = addr;
((struct trapframe *)regs)->tf_eip = addr;
return 0;
}
int
ptrace_single_step (struct proc *p) {
struct pcb *pcb;
void *regs = (char*)p->p_addr +
((char*) p->p_regs - (char*) kstack);
pcb = &p->p_addr->u_pcb;
if (pcb->pcb_flags & FM_TRAP)
((struct trapframe *)regs)->tf_eflags |= PSL_T;
else
((struct syscframe *)regs)->sf_eflags |= PSL_T;
((struct trapframe *)regs)->tf_eflags |= PSL_T;
return 0;
}
/*
* Copy the registers to user-space. This is tedious because
* we essentially duplicate code for trapframe and syscframe. *sigh*
* Copy the registers to user-space.
*/
int
@ -1325,50 +1300,24 @@ int
fill_regs(struct proc *p, struct regs *regs) {
int error;
struct trapframe *tp;
struct syscframe *sp;
struct pcb *pcb;
void *ptr = (char*)p->p_addr +
((char*) p->p_regs - (char*) kstack);
pcb = &p->p_addr->u_pcb;
if (pcb->pcb_flags & FM_TRAP) {
tp = ptr;
regs->r_es = tp->tf_es;
regs->r_ds = tp->tf_ds;
regs->r_edi = tp->tf_edi;
regs->r_esi = tp->tf_esi;
regs->r_ebp = tp->tf_ebp;
regs->r_ebx = tp->tf_ebx;
regs->r_edx = tp->tf_edx;
regs->r_ecx = tp->tf_ecx;
regs->r_eax = tp->tf_eax;
regs->r_eip = tp->tf_eip;
regs->r_cs = tp->tf_cs;
regs->r_eflags = tp->tf_eflags;
regs->r_esp = tp->tf_esp;
regs->r_ss = tp->tf_ss;
} else {
sp = ptr;
/*
* No sf_es or sf_ds... dunno why.
*/
/*
* regs.r_es = sp->sf_es;
* regs.r_ds = sp->sf_ds;
*/
regs->r_edi = sp->sf_edi;
regs->r_esi = sp->sf_esi;
regs->r_ebp = sp->sf_ebp;
regs->r_ebx = sp->sf_ebx;
regs->r_edx = sp->sf_edx;
regs->r_ecx = sp->sf_ecx;
regs->r_eax = sp->sf_eax;
regs->r_eip = sp->sf_eip;
regs->r_cs = sp->sf_cs;
regs->r_eflags = sp->sf_eflags;
regs->r_esp = sp->sf_esp;
regs->r_ss = sp->sf_ss;
}
tp = ptr;
regs->r_es = tp->tf_es;
regs->r_ds = tp->tf_ds;
regs->r_edi = tp->tf_edi;
regs->r_esi = tp->tf_esi;
regs->r_ebp = tp->tf_ebp;
regs->r_ebx = tp->tf_ebx;
regs->r_edx = tp->tf_edx;
regs->r_ecx = tp->tf_ecx;
regs->r_eax = tp->tf_eax;
regs->r_eip = tp->tf_eip;
regs->r_cs = tp->tf_cs;
regs->r_eflags = tp->tf_eflags;
regs->r_esp = tp->tf_esp;
regs->r_ss = tp->tf_ss;
return 0;
}
@ -1376,122 +1325,27 @@ int
set_regs (struct proc *p, struct regs *regs) {
int error;
struct trapframe *tp;
struct syscframe *sp;
struct pcb *pcb;
void *ptr = (char*)p->p_addr +
((char*) p->p_regs - (char*) kstack);
pcb = &p->p_addr->u_pcb;
if (pcb->pcb_flags & FM_TRAP) {
tp = ptr;
tp->tf_es = regs->r_es;
tp->tf_ds = regs->r_ds;
tp->tf_edi = regs->r_edi;
tp->tf_esi = regs->r_esi;
tp->tf_ebp = regs->r_ebp;
tp->tf_ebx = regs->r_ebx;
tp->tf_edx = regs->r_edx;
tp->tf_ecx = regs->r_ecx;
tp->tf_eax = regs->r_eax;
tp->tf_eip = regs->r_eip;
tp->tf_cs = regs->r_cs;
tp->tf_eflags = regs->r_eflags;
tp->tf_esp = regs->r_esp;
tp->tf_ss = regs->r_ss;
} else {
sp = ptr;
/*
* No sf_es or sf_ds members, dunno why...
*/
/*
* sp->sf_es = regs.r_es;
* sp->sf_ds = regs.r_ds;
*/
sp->sf_edi = regs->r_edi;
sp->sf_esi = regs->r_esi;
sp->sf_ebp = regs->r_ebp;
sp->sf_ebx = regs->r_ebx;
sp->sf_edx = regs->r_edx;
sp->sf_ecx = regs->r_ecx;
sp->sf_eax = regs->r_eax;
sp->sf_eip = regs->r_eip;
sp->sf_cs = regs->r_cs;
sp->sf_eflags = regs->r_eflags;
sp->sf_esp = regs->r_esp;
sp->sf_ss = regs->r_ss;
}
tp = ptr;
tp->tf_es = regs->r_es;
tp->tf_ds = regs->r_ds;
tp->tf_edi = regs->r_edi;
tp->tf_esi = regs->r_esi;
tp->tf_ebp = regs->r_ebp;
tp->tf_ebx = regs->r_ebx;
tp->tf_edx = regs->r_edx;
tp->tf_ecx = regs->r_ecx;
tp->tf_eax = regs->r_eax;
tp->tf_eip = regs->r_eip;
tp->tf_cs = regs->r_cs;
tp->tf_eflags = regs->r_eflags;
tp->tf_esp = regs->r_esp;
tp->tf_ss = regs->r_ss;
return 0;
}
#ifdef SLOW_OLD_COPYSTRS
vmunaccess() {}
#if 0 /* assembler versions now in locore.s */
/*
* Below written in C to allow access to debugging code
*/
copyinstr(fromaddr, toaddr, maxlength, lencopied) u_int *lencopied, maxlength;
void *toaddr, *fromaddr; {
int c,tally;
tally = 0;
while (maxlength--) {
c = fubyte(fromaddr++);
if (c == -1) {
if(lencopied) *lencopied = tally;
return(EFAULT);
}
tally++;
*(char *)toaddr++ = (char) c;
if (c == 0){
if(lencopied) *lencopied = (u_int)tally;
return(0);
}
}
if(lencopied) *lencopied = (u_int)tally;
return(ENAMETOOLONG);
}
copyoutstr(fromaddr, toaddr, maxlength, lencopied) u_int *lencopied, maxlength;
void *fromaddr, *toaddr; {
int c;
int tally;
tally = 0;
while (maxlength--) {
c = subyte(toaddr++, *(char *)fromaddr);
if (c == -1) return(EFAULT);
tally++;
if (*(char *)fromaddr++ == 0){
if(lencopied) *lencopied = tally;
return(0);
}
}
if(lencopied) *lencopied = tally;
return(ENAMETOOLONG);
}
#endif /* SLOW_OLD_COPYSTRS */
copystr(fromaddr, toaddr, maxlength, lencopied) u_int *lencopied, maxlength;
void *fromaddr, *toaddr; {
u_int tally;
tally = 0;
while (maxlength--) {
*(u_char *)toaddr = *(u_char *)fromaddr++;
tally++;
if (*(u_char *)toaddr++ == 0) {
if(lencopied) *lencopied = tally;
return(0);
}
}
if(lencopied) *lencopied = tally;
return(ENAMETOOLONG);
}
#endif
#include "ddb.h"
#if NDDB <= 0
void

14
sys/amd64/amd64/mem.c
View file

@ -38,7 +38,7 @@
*
* from: Utah $Hdr: mem.c 1.13 89/10/08$
* from: @(#)mem.c 7.2 (Berkeley) 5/9/91
* $Id: mem.c,v 1.5 1993/11/25 01:30:59 wollman Exp $
* $Id: mem.c,v 1.6 1993/12/19 00:50:06 wollman Exp $
*/
/*
@ -70,12 +70,12 @@ mmclose(dev, uio, flags)
struct uio *uio;
int flags;
{
struct syscframe *fp;
struct trapframe *fp;
switch (minor(dev)) {
case 14:
fp = (struct syscframe *)curproc->p_regs;
fp->sf_eflags &= ~PSL_IOPL;
fp = (struct trapframe *)curproc->p_regs;
fp->tf_eflags &= ~PSL_IOPL;
break;
default:
break;
@ -89,12 +89,12 @@ mmopen(dev, uio, flags)
struct uio *uio;
int flags;
{
struct syscframe *fp;
struct trapframe *fp;
switch (minor(dev)) {
case 14:
fp = (struct syscframe *)curproc->p_regs;
fp->sf_eflags |= PSL_IOPL;
fp = (struct trapframe *)curproc->p_regs;
fp->tf_eflags |= PSL_IOPL;
break;
default:
break;

61
sys/amd64/amd64/trap.c
View file

@ -34,7 +34,7 @@
* SUCH DAMAGE.
*
* from: @(#)trap.c 7.4 (Berkeley) 5/13/91
* $Id: trap.c,v 1.11 1993/12/12 12:22:57 davidg Exp $
* $Id: trap.c,v 1.12 1993/12/19 00:50:09 wollman Exp $
*/
/*
@ -179,7 +179,6 @@ if(curpcb == 0 || curproc == 0) goto we_re_toast;
if (ISPL(frame.tf_cs) == SEL_UPL) {
type |= T_USER;
p->p_regs = (int *)&frame;
curpcb->pcb_flags |= FM_TRAP; /* used by sendsig */
}
ucode=0;
@ -487,7 +486,6 @@ if(curpcb == 0 || curproc == 0) goto we_re_toast;
}
}
curpri = p->p_pri;
curpcb->pcb_flags &= ~FM_TRAP; /* used by sendsig */
}
/*
@ -575,7 +573,7 @@ int trapwrite(addr)
/*ARGSUSED*/
void
syscall(frame)
volatile struct syscframe frame;
volatile struct trapframe frame;
{
register int *locr0 = ((int *)&frame);
register caddr_t params;
@ -591,29 +589,30 @@ syscall(frame)
r0 = 0; r0 = r0; r1 = 0; r1 = r1;
#endif
syst = p->p_stime;
if (ISPL(frame.sf_cs) != SEL_UPL)
if (ISPL(frame.tf_cs) != SEL_UPL)
panic("syscall");
code = frame.sf_eax;
curpcb->pcb_flags &= ~FM_TRAP; /* used by sendsig */
code = frame.tf_eax;
p->p_regs = (int *)&frame;
params = (caddr_t)frame.sf_esp + sizeof (int) ;
params = (caddr_t)frame.tf_esp + sizeof (int) ;
/*
* Reconstruct pc, assuming lcall $X,y is 7 bytes, as it is always.
*/
opc = frame.sf_eip - 7;
callp = (code >= nsysent) ? &sysent[63] : &sysent[code];
if (callp == sysent) {
i = fuword(params);
opc = frame.tf_eip - 7;
if (code == 0) {
code = fuword(params);
params += sizeof (int);
callp = (code >= nsysent) ? &sysent[63] : &sysent[code];
}
if (code < 0 || code >= nsysent)
callp = &sysent[0];
else
callp = &sysent[code];
if ((i = callp->sy_narg * sizeof (int)) &&
(error = copyin(params, (caddr_t)args, (u_int)i))) {
frame.sf_eax = error;
frame.sf_eflags |= PSL_C; /* carry bit */
frame.tf_eax = error;
frame.tf_eflags |= PSL_C; /* carry bit */
#ifdef KTRACE
if (KTRPOINT(p, KTR_SYSCALL))
ktrsyscall(p->p_tracep, code, callp->sy_narg, args);
@ -625,20 +624,20 @@ syscall(frame)
ktrsyscall(p->p_tracep, code, callp->sy_narg, args);
#endif
rval[0] = 0;
rval[1] = frame.sf_edx;
rval[1] = frame.tf_edx;
/*pg("%d. s %d\n", p->p_pid, code);*/
error = (*callp->sy_call)(p, args, rval);
if (error == ERESTART)
frame.sf_eip = opc;
frame.tf_eip = opc;
else if (error != EJUSTRETURN) {
if (error) {
/*pg("error %d", error);*/
frame.sf_eax = error;
frame.sf_eflags |= PSL_C; /* carry bit */
frame.tf_eax = error;
frame.tf_eflags |= PSL_C; /* carry bit */
} else {
frame.sf_eax = rval[0];
frame.sf_edx = rval[1];
frame.sf_eflags &= ~PSL_C; /* carry bit */
frame.tf_eax = rval[0];
frame.tf_edx = rval[1];
frame.tf_eflags &= ~PSL_C; /* carry bit */
}
}
/* else if (error == EJUSTRETURN) */
@ -679,10 +678,10 @@ syscall(frame)
if (ticks) {
#ifdef PROFTIMER
extern int profscale;
addupc(frame.sf_eip, &p->p_stats->p_prof,
addupc(frame.tf_eip, &p->p_stats->p_prof,
ticks * profscale);
#else
addupc(frame.sf_eip, &p->p_stats->p_prof, ticks);
addupc(frame.tf_eip, &p->p_stats->p_prof, ticks);
#endif
}
}
@ -693,13 +692,13 @@ syscall(frame)
#endif
#ifdef DIAGNOSTICx
{ extern int _udatasel, _ucodesel;
if (frame.sf_ss != _udatasel)
printf("ss %x call %d\n", frame.sf_ss, code);
if ((frame.sf_cs&0xffff) != _ucodesel)
printf("cs %x call %d\n", frame.sf_cs, code);
if (frame.sf_eip > VM_MAXUSER_ADDRESS) {
printf("eip %x call %d\n", frame.sf_eip, code);
frame.sf_eip = 0;
if (frame.tf_ss != _udatasel)
printf("ss %x call %d\n", frame.tf_ss, code);
if ((frame.tf_cs&0xffff) != _ucodesel)
printf("cs %x call %d\n", frame.tf_cs, code);
if (frame.tf_eip > VM_MAXUSER_ADDRESS) {
printf("eip %x call %d\n", frame.tf_eip, code);
frame.tf_eip = 0;
}
}
#endif

25
sys/amd64/include/frame.h
View file

@ -34,7 +34,7 @@
* SUCH DAMAGE.
*
* from: @(#)frame.h 5.2 (Berkeley) 1/18/91
* $Id: frame.h,v 1.5 1993/12/03 05:10:00 alm Exp $
* $Id: frame.h,v 1.6 1993/12/19 00:50:15 wollman Exp $
*/
#ifndef _MACHINE_FRAME_H_
@ -113,28 +113,5 @@ struct sigframe {
int sf_edx;
int sf_ecx;
struct sigcontext sf_sc;
} ;
/*
* Call Gate/System Call Stack Frame
*/
struct syscframe {
int sf_edi;
int sf_esi;
int sf_ebp;
int :32; /* redundant save of isp */
int sf_ebx;
int sf_edx;
int sf_ecx;
int sf_eax;
int sf_eflags;
/* below portion defined in 386 hardware */
/* int sf_args[N];*/ /* if call gate copy args enabled!*/
int sf_eip;
int sf_cs;
/* below only when transitting rings (e.g. user to kernel) */
int sf_esp;
int sf_ss;
};
#endif /* _MACHINE_FRAME_H_ */

3
sys/amd64/include/pcb.h
View file

@ -34,7 +34,7 @@
* SUCH DAMAGE.
*
* from: @(#)pcb.h 5.10 (Berkeley) 5/12/91
* $Id: pcb.h,v 1.2 1993/10/08 20:51:00 rgrimes Exp $
* $Id: pcb.h,v 1.3 1993/11/07 17:42:59 wollman Exp $
*/
#ifndef _I386_PCB_H_
@ -72,7 +72,6 @@ struct pcb {
#define FP_NEEDSRESTORE 0x04 /* ... that needs restore on next DNA fault */
#endif
#define FP_USESEMC 0x08 /* process uses EMC memory-mapped mode */
#define FM_TRAP 0x10 /* process entered kernel on a trap frame */
#define FP_SOFTFP 0x20 /* process using software fltng pnt emulator */
short pcb_iml; /* interrupt mask level */
caddr_t pcb_onfault; /* copyin/out fault recovery */

24
sys/amd64/include/reg.h
View file

@ -34,7 +34,7 @@
* SUCH DAMAGE.
*
* from: @(#)reg.h 5.5 (Berkeley) 1/18/91
* $Id: reg.h,v 1.4 1993/11/16 09:54:57 davidg Exp $
* $Id: reg.h,v 1.5 1993/12/03 05:10:08 alm Exp $
*/
#ifndef _MACHINE_REG_H_
@ -68,28 +68,6 @@
#define tESP (15)
#define tSS (16)
/* During a system call, registers are at these offsets instead of above. */
#define sEDI (0)
#define sESI (1)
#define sEBP (2)
#define sEBX (4)
#define sEDX (5)
#define sECX (6)
#define sEAX (7)
#define sEFLAGS (8)
#define sEIP (9)
#define sCS (10)
#define sESP (11)
#define sSS (12)
#define PC sEIP
#define SP sESP
#define PS sEFLAGS
#define R0 sEDX
#define R1 sECX
/*
* Registers accessible to ptrace(2) syscall for debugger
* The machine-dependent code for PT_{SET,GET}REGS needs to

4
sys/amd64/isa/npx.c
View file

@ -32,7 +32,7 @@
* SUCH DAMAGE.
*
* from: @(#)npx.c 7.2 (Berkeley) 5/12/91
* $Id: npx.c,v 1.4 1993/11/03 00:29:19 paul Exp $
* $Id: npx.c,v 1.5 1993/11/03 23:32:35 paul Exp $
*/
#include "npx.h"
@ -439,7 +439,6 @@ npxintr(frame)
* just before it is used).
*/
curproc->p_regs = (int *)&frame.if_es;
curpcb->pcb_flags |= FM_TRAP; /* used by sendsig */
#ifdef notyet
/*
* Encode the appropriate code for detailed information on
@ -450,7 +449,6 @@ npxintr(frame)
code = 0; /* XXX */
#endif
trapsignal(curproc, SIGFPE, code);
curpcb->pcb_flags &= ~FM_TRAP;
} else {
/*
* Nested interrupt. These losers occur when:

8
sys/dev/syscons/syscons.c
View file

@ -35,7 +35,7 @@
*
* from: @(#)pccons.c 5.11 (Berkeley) 5/21/91
* from: @(#)syscons.c 1.1 931021
* $Id: syscons.c,v 1.22 1993/12/21 02:49:13 rich Exp $
* $Id: syscons.c,v 1.23 1993/12/21 03:27:26 rich Exp $
*
* Heavily modified by Søren Schmidt (sos@login.dkuug.dk) to provide:
*
@ -526,14 +526,8 @@ pcparam(struct tty *tp, struct termios *t)
return(0);
}
#if defined(NetBSD)
#define frametype struct trapframe
#define eflags tf_eflags
#else
#define frametype struct syscframe
#define eflags sf_eflags
#endif
int
pcioctl(dev_t dev, int cmd, caddr_t data, int flag, struct proc *p)

93
sys/i386/i386/db_trace.c
View file

@ -23,7 +23,7 @@
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*
* $Id: db_trace.c,v 1.2 1993/10/16 14:14:56 rgrimes Exp $
* $Id: db_trace.c,v 1.3 1993/12/19 00:50:01 wollman Exp $
*/
#include "param.h"
@ -73,8 +73,10 @@ struct i386_frame {
#define TRAP 1
#define INTERRUPT 2
#define SYSCALL 3
db_addr_t db_trap_symbol_value = 0;
db_addr_t db_syscall_symbol_value = 0;
db_addr_t db_kdintr_symbol_value = 0;
boolean_t db_trace_symbols_found = FALSE;
@ -86,6 +88,8 @@ db_find_trace_symbols()
db_trap_symbol_value = (db_addr_t) value;
if (db_value_of_name("_kdintr", &value))
db_kdintr_symbol_value = (db_addr_t) value;
if (db_value_of_name("_syscall", &value))
db_syscall_symbol_value = (db_addr_t) value;
db_trace_symbols_found = TRUE;
}
@ -135,26 +139,43 @@ db_nextframe(fp, ip, argp, is_trap)
{
struct i386_saved_state *saved_regs;
if (is_trap == 0) {
switch (is_trap) {
case 0:
*ip = (db_addr_t)
db_get_value((int) &(*fp)->f_retaddr, 4, FALSE);
*fp = (struct i386_frame *)
db_get_value((int) &(*fp)->f_frame, 4, FALSE);
} else {
break;
case TRAP:
default:
/*
* We know that trap() has 1 argument and we know that
* it is an (int *).
*/
#if 0
saved_regs = (struct i386_saved_state *)
db_get_value((int)argp, 4, FALSE);
#endif
saved_regs = (struct i386_saved_state *)argp;
db_printf("--- trap (number %d) ---\n",
saved_regs->tf_trapno & 0xffff);
db_printsym(saved_regs->tf_eip, DB_STGY_XTRN);
db_printf(":\n");
*fp = (struct i386_frame *)saved_regs->tf_ebp;
*ip = (db_addr_t)saved_regs->tf_eip;
}
break;
case SYSCALL: {
struct trapframe *saved_regs = (struct trapframe *)argp;
db_printf("--- syscall (number %d) ---\n", saved_regs->tf_eax);
db_printsym(saved_regs->tf_eip, DB_STGY_XTRN);
db_printf(":\n");
*fp = (struct i386_frame *)saved_regs->tf_ebp;
*ip = (db_addr_t)saved_regs->tf_eip;
}
break;
}
}
void
@ -171,8 +192,10 @@ db_stack_trace_cmd(addr, have_addr, count, modif)
boolean_t kernel_only = TRUE;
boolean_t trace_thread = FALSE;
#if 0
if (!db_trace_symbols_found)
db_find_trace_symbols();
#endif
{
register char *cp = modif;
@ -203,38 +226,84 @@ db_stack_trace_cmd(addr, have_addr, count, modif)
lastframe = 0;
while (count-- && frame != 0) {
register int narg;
int narg;
char * name;
db_expr_t offset;
db_sym_t sym;
#define MAXNARG 16
char *argnames[MAXNARG], **argnp = NULL;
if (INKERNEL((int)frame) && callpc == db_trap_symbol_value) {
sym = db_search_symbol(callpc, DB_STGY_ANY, &offset);
db_symbol_values(sym, &name, NULL);
if (lastframe == 0 && sym == NULL) {
/* Symbol not found, peek at code */
int instr = db_get_value(callpc, 4, FALSE);
offset = 1;
if ((instr & 0x00ffffff) == 0x00e58955 ||
/* enter: pushl %ebp, movl %esp, %ebp */
(instr & 0x0000ffff) == 0x0000e589
/* enter+1: movl %esp, %ebp */ ) {
offset = 0;
}
}
#define STRCMP(s1,s2) ((s1) && (s2) && strcmp((s1), (s2)) == 0)
if (INKERNEL((int)frame) && STRCMP(name, "_trap")) {
narg = 1;
is_trap = TRAP;
}
else
if (INKERNEL((int)frame) && callpc == db_kdintr_symbol_value) {
if (INKERNEL((int)frame) && STRCMP(name, "_kdintr")) {
is_trap = INTERRUPT;
narg = 0;
}
else
if (INKERNEL((int)frame) && STRCMP(name, "_syscall")) {
is_trap = SYSCALL;
narg = 0;
}
#undef STRCMP
else {
is_trap = 0;
narg = db_numargs(frame);
narg = MAXNARG;
if (db_sym_numargs(sym, &narg, argnames)) {
argnp = argnames;
} else {
narg = db_numargs(frame);
}
}
db_find_sym_and_offset(callpc, &name, &offset);
db_printf("%s(", name);
argp = &frame->f_arg0;
if (lastframe == 0 && offset == 0 && !have_addr) {
/*
* We have a breakpoint before the frame is set up
* Use %esp instead
*/
argp = &((struct i386_frame *)(ddb_regs.tf_esp-4))->f_arg0;
} else
argp = &frame->f_arg0;
while (narg) {
if (argnp)
db_printf("%s=", *argnp++);
db_printf("%x", db_get_value((int)argp, 4, FALSE));
argp++;
if (--narg != 0)
db_printf(",");
}
db_printf(") at ");
db_printsym(callpc, DB_STGY_XTRN);
db_printsym(callpc, DB_STGY_PROC);
db_printf("\n");
if (lastframe == 0 && offset == 0 && !have_addr) {
/* Frame really belongs to next callpc */
lastframe = (struct i386_frame *)(ddb_regs.tf_esp-4);
callpc = (db_addr_t)db_get_value((int)&lastframe->f_retaddr, 4, FALSE);
continue;
}
lastframe = frame;
db_nextframe(&frame, &callpc, &frame->f_arg0, is_trap);
@ -257,7 +326,7 @@ db_stack_trace_cmd(addr, have_addr, count, modif)
else {
/* in user */
if (frame <= lastframe) {
db_printf("Bad frame pointer: 0x%x\n", frame);
db_printf("Bad user frame pointer: 0x%x\n", frame);
break;
}
}

40
sys/i386/i386/exception.s
View file

@ -30,7 +30,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id$
* $Id: exception.s,v 1.1 1993/11/13 02:24:57 davidg Exp $
*/
#include "npx.h" /* NNPX */
@ -181,7 +181,7 @@ calltrap:
* Return through doreti to handle ASTs. Have to change trap frame
* to interrupt frame.
*/
movl $T_ASTFLT,4+4+32(%esp) /* new trap type (err code not used) */
movl $T_ASTFLT,TF_TRAPNO(%esp) /* new trap type (err code not used) */
pushl _cpl
pushl $0 /* dummy unit */
jmp doreti
@ -195,8 +195,8 @@ calltrap:
bpttraps:
pushal
nop
pushl %es
pushl %ds
pushl %es
movl $KDSEL,%eax
movl %ax,%ds
movl %ax,%es
@ -211,38 +211,24 @@ bpttraps:
*/
SUPERALIGN_TEXT
IDTVEC(syscall)
pushfl /* only for stupid carry bit and more stupid wait3 cc kludge */
/* XXX - also for direction flag (bzero, etc. clear it) */
pushal /* only need eax,ecx,edx - trap resaves others */
pushfl /* Room for tf_err */
pushfl /* Room for tf_trapno */
pushal
nop
pushl %ds
pushl %es
movl $KDSEL,%eax /* switch to kernel segments */
movl %ax,%ds
movl %ax,%es
movl TF_ERR(%esp),%eax /* copy eflags from tf_err to fs_eflags */
movl %eax,TF_EFLAGS(%esp)
movl $0,TF_ERR(%esp) /* zero tf_err */
incl _cnt+V_SYSCALL
call _syscall
/*
* Return through doreti to handle ASTs. Have to change syscall frame
* to interrupt frame.
*
* XXX - we should have set up the frame earlier to avoid the
* following popal/pushal (not much can be done to avoid shuffling
* the flags). Consistent frames would simplify things all over.
* Return through doreti to handle ASTs.
*/
movl 32+0(%esp),%eax /* old flags, shuffle to above cs:eip */
movl 32+4(%esp),%ebx /* `int' frame should have been ef, eip, cs */
movl 32+8(%esp),%ecx
movl %ebx,32+0(%esp)
movl %ecx,32+4(%esp)
movl %eax,32+8(%esp)
popal
nop
pushl $0 /* dummy error code */
pushl $T_ASTFLT
pushal
nop
movl __udatasel,%eax /* switch back to user segments */
pushl %eax /* XXX - better to preserve originals? */
pushl %eax
movl $T_ASTFLT,TF_TRAPNO(%esp) /* new trap type (err code not used) */
pushl _cpl
pushl $0
jmp doreti

274
sys/i386/i386/machdep.c
View file

@ -35,7 +35,7 @@
* SUCH DAMAGE.
*
* from: @(#)machdep.c 7.4 (Berkeley) 6/3/91
* $Id: machdep.c,v 1.22 1993/12/19 00:50:03 wollman Exp $
* $Id: machdep.c,v 1.23 1993/12/22 13:12:04 davidg Exp $
*/
#include "npx.h"
@ -418,7 +418,6 @@ sendsig(catcher, sig, mask, code)
regs = p->p_regs;
oonstack = ps->ps_onstack;
frmtrap = curpcb->pcb_flags & FM_TRAP;
/*
* Allocate and validate space for the signal handler
* context. Note that if the stack is in P0 space, the
@ -431,12 +430,8 @@ sendsig(catcher, sig, mask, code)
- sizeof(struct sigframe));
ps->ps_onstack = 1;
} else {
if (frmtrap)
fp = (struct sigframe *)(regs[tESP]
- sizeof(struct sigframe));
else
fp = (struct sigframe *)(regs[sESP]
- sizeof(struct sigframe));
fp = (struct sigframe *)(regs[tESP]
- sizeof(struct sigframe));
}
if (useracc((caddr_t)fp, sizeof (struct sigframe), B_WRITE) == 0) {
@ -463,35 +458,21 @@ sendsig(catcher, sig, mask, code)
fp->sf_handler = catcher;
/* save scratch registers */
if(frmtrap) {
fp->sf_eax = regs[tEAX];
fp->sf_edx = regs[tEDX];
fp->sf_ecx = regs[tECX];
} else {
fp->sf_eax = regs[sEAX];
fp->sf_edx = regs[sEDX];
fp->sf_ecx = regs[sECX];
}
fp->sf_eax = regs[tEAX];
fp->sf_edx = regs[tEDX];
fp->sf_ecx = regs[tECX];
/*
* Build the signal context to be used by sigreturn.
*/
fp->sf_sc.sc_onstack = oonstack;
fp->sf_sc.sc_mask = mask;
if(frmtrap) {
fp->sf_sc.sc_sp = regs[tESP];
fp->sf_sc.sc_fp = regs[tEBP];
fp->sf_sc.sc_pc = regs[tEIP];
fp->sf_sc.sc_ps = regs[tEFLAGS];
regs[tESP] = (int)fp;
regs[tEIP] = (int)((struct pcb *)kstack)->pcb_sigc;
} else {
fp->sf_sc.sc_sp = regs[sESP];
fp->sf_sc.sc_fp = regs[sEBP];
fp->sf_sc.sc_pc = regs[sEIP];
fp->sf_sc.sc_ps = regs[sEFLAGS];
regs[sESP] = (int)fp;
regs[sEIP] = (int)((struct pcb *)kstack)->pcb_sigc;
}
fp->sf_sc.sc_sp = regs[tESP];
fp->sf_sc.sc_fp = regs[tEBP];
fp->sf_sc.sc_pc = regs[tEIP];
fp->sf_sc.sc_ps = regs[tEFLAGS];
regs[tESP] = (int)fp;
regs[tEIP] = (int)((struct pcb *)kstack)->pcb_sigc;
}
/*
@ -519,7 +500,7 @@ sigreturn(p, uap, retval)
register int *regs = p->p_regs;
/*
* (XXX old comment) regs[sESP] points to the return address.
* (XXX old comment) regs[tESP] points to the return address.
* The user scp pointer is above that.
* The return address is faked in the signal trampoline code
* for consistency.
@ -532,9 +513,9 @@ sigreturn(p, uap, retval)
return(EINVAL);
/* restore scratch registers */
regs[sEAX] = fp->sf_eax ;
regs[sEDX] = fp->sf_edx ;
regs[sECX] = fp->sf_ecx ;
regs[tEAX] = fp->sf_eax ;
regs[tEDX] = fp->sf_edx ;
regs[tECX] = fp->sf_ecx ;
if (useracc((caddr_t)scp, sizeof (*scp), 0) == 0)
return(EINVAL);
@ -546,10 +527,10 @@ sigreturn(p, uap, retval)
p->p_sigacts->ps_onstack = scp->sc_onstack & 01;
p->p_sigmask = scp->sc_mask &~
(sigmask(SIGKILL)|sigmask(SIGCONT)|sigmask(SIGSTOP));
regs[sEBP] = scp->sc_fp;
regs[sESP] = scp->sc_sp;
regs[sEIP] = scp->sc_pc;
regs[sEFLAGS] = scp->sc_ps;
regs[tEBP] = scp->sc_fp;
regs[tESP] = scp->sc_sp;
regs[tEIP] = scp->sc_pc;
regs[tEFLAGS] = scp->sc_ps;
return(EJUSTRETURN);
}
@ -762,13 +743,18 @@ initcpu()
* Clear registers on exec
*/
void
setregs(p, entry)
setregs(p, entry, stack)
struct proc *p;
u_long entry;
u_long stack;
{
p->p_regs[sEBP] = 0; /* bottom of the fp chain */
p->p_regs[sEIP] = entry;
p->p_regs[tEBP] = 0; /* bottom of the fp chain */
p->p_regs[tEIP] = entry;
p->p_regs[tESP] = stack;
p->p_regs[tSS] = _udatasel;
p->p_regs[tDS] = _udatasel;
p->p_regs[tES] = _udatasel;
p->p_regs[tCS] = _ucodesel;
p->p_addr->u_pcb.pcb_flags = 0; /* no fp at all */
load_cr0(rcr0() | CR0_TS); /* start emulating */
@ -1153,7 +1139,7 @@ init386(first)
x = (int) &IDTVEC(syscall);
gdp->gd_looffset = x++;
gdp->gd_selector = GSEL(GCODE_SEL,SEL_KPL);
gdp->gd_stkcpy = 0;
gdp->gd_stkcpy = 1; /* Leaves room for eflags like a trap */
gdp->gd_type = SDT_SYS386CGT;
gdp->gd_dpl = SEL_UPL;
gdp->gd_p = 1;
@ -1268,35 +1254,24 @@ _remque(element)
int
ptrace_set_pc (struct proc *p, unsigned int addr) {
struct pcb *pcb;
void *regs = (char*)p->p_addr +
((char*) p->p_regs - (char*) kstack);
pcb = &p->p_addr->u_pcb;
if (pcb->pcb_flags & FM_TRAP)
((struct trapframe *)regs)->tf_eip = addr;
else
((struct syscframe *)regs)->sf_eip = addr;
((struct trapframe *)regs)->tf_eip = addr;
return 0;
}
int
ptrace_single_step (struct proc *p) {
struct pcb *pcb;
void *regs = (char*)p->p_addr +
((char*) p->p_regs - (char*) kstack);
pcb = &p->p_addr->u_pcb;
if (pcb->pcb_flags & FM_TRAP)
((struct trapframe *)regs)->tf_eflags |= PSL_T;
else
((struct syscframe *)regs)->sf_eflags |= PSL_T;
((struct trapframe *)regs)->tf_eflags |= PSL_T;
return 0;
}
/*
* Copy the registers to user-space. This is tedious because
* we essentially duplicate code for trapframe and syscframe. *sigh*
* Copy the registers to user-space.
*/
int
@ -1325,50 +1300,24 @@ int
fill_regs(struct proc *p, struct regs *regs) {
int error;
struct trapframe *tp;
struct syscframe *sp;
struct pcb *pcb;
void *ptr = (char*)p->p_addr +
((char*) p->p_regs - (char*) kstack);
pcb = &p->p_addr->u_pcb;
if (pcb->pcb_flags & FM_TRAP) {
tp = ptr;
regs->r_es = tp->tf_es;
regs->r_ds = tp->tf_ds;
regs->r_edi = tp->tf_edi;
regs->r_esi = tp->tf_esi;
regs->r_ebp = tp->tf_ebp;
regs->r_ebx = tp->tf_ebx;
regs->r_edx = tp->tf_edx;
regs->r_ecx = tp->tf_ecx;
regs->r_eax = tp->tf_eax;
regs->r_eip = tp->tf_eip;
regs->r_cs = tp->tf_cs;
regs->r_eflags = tp->tf_eflags;
regs->r_esp = tp->tf_esp;
regs->r_ss = tp->tf_ss;
} else {
sp = ptr;
/*
* No sf_es or sf_ds... dunno why.
*/
/*
* regs.r_es = sp->sf_es;
* regs.r_ds = sp->sf_ds;
*/
regs->r_edi = sp->sf_edi;
regs->r_esi = sp->sf_esi;
regs->r_ebp = sp->sf_ebp;
regs->r_ebx = sp->sf_ebx;
regs->r_edx = sp->sf_edx;
regs->r_ecx = sp->sf_ecx;
regs->r_eax = sp->sf_eax;
regs->r_eip = sp->sf_eip;
regs->r_cs = sp->sf_cs;
regs->r_eflags = sp->sf_eflags;
regs->r_esp = sp->sf_esp;
regs->r_ss = sp->sf_ss;
}
tp = ptr;
regs->r_es = tp->tf_es;
regs->r_ds = tp->tf_ds;
regs->r_edi = tp->tf_edi;
regs->r_esi = tp->tf_esi;
regs->r_ebp = tp->tf_ebp;
regs->r_ebx = tp->tf_ebx;
regs->r_edx = tp->tf_edx;
regs->r_ecx = tp->tf_ecx;
regs->r_eax = tp->tf_eax;
regs->r_eip = tp->tf_eip;
regs->r_cs = tp->tf_cs;
regs->r_eflags = tp->tf_eflags;
regs->r_esp = tp->tf_esp;
regs->r_ss = tp->tf_ss;
return 0;
}
@ -1376,122 +1325,27 @@ int
set_regs (struct proc *p, struct regs *regs) {
int error;
struct trapframe *tp;
struct syscframe *sp;
struct pcb *pcb;
void *ptr = (char*)p->p_addr +
((char*) p->p_regs - (char*) kstack);
pcb = &p->p_addr->u_pcb;
if (pcb->pcb_flags & FM_TRAP) {
tp = ptr;
tp->tf_es = regs->r_es;
tp->tf_ds = regs->r_ds;
tp->tf_edi = regs->r_edi;
tp->tf_esi = regs->r_esi;
tp->tf_ebp = regs->r_ebp;
tp->tf_ebx = regs->r_ebx;
tp->tf_edx = regs->r_edx;
tp->tf_ecx = regs->r_ecx;
tp->tf_eax = regs->r_eax;
tp->tf_eip = regs->r_eip;
tp->tf_cs = regs->r_cs;
tp->tf_eflags = regs->r_eflags;
tp->tf_esp = regs->r_esp;
tp->tf_ss = regs->r_ss;
} else {
sp = ptr;
/*
* No sf_es or sf_ds members, dunno why...
*/
/*
* sp->sf_es = regs.r_es;
* sp->sf_ds = regs.r_ds;
*/
sp->sf_edi = regs->r_edi;
sp->sf_esi = regs->r_esi;
sp->sf_ebp = regs->r_ebp;
sp->sf_ebx = regs->r_ebx;
sp->sf_edx = regs->r_edx;
sp->sf_ecx = regs->r_ecx;
sp->sf_eax = regs->r_eax;
sp->sf_eip = regs->r_eip;
sp->sf_cs = regs->r_cs;
sp->sf_eflags = regs->r_eflags;
sp->sf_esp = regs->r_esp;
sp->sf_ss = regs->r_ss;
}
tp = ptr;
tp->tf_es = regs->r_es;
tp->tf_ds = regs->r_ds;
tp->tf_edi = regs->r_edi;
tp->tf_esi = regs->r_esi;
tp->tf_ebp = regs->r_ebp;
tp->tf_ebx = regs->r_ebx;
tp->tf_edx = regs->r_edx;
tp->tf_ecx = regs->r_ecx;
tp->tf_eax = regs->r_eax;
tp->tf_eip = regs->r_eip;
tp->tf_cs = regs->r_cs;
tp->tf_eflags = regs->r_eflags;
tp->tf_esp = regs->r_esp;
tp->tf_ss = regs->r_ss;
return 0;
}
#ifdef SLOW_OLD_COPYSTRS
vmunaccess() {}
#if 0 /* assembler versions now in locore.s */
/*
* Below written in C to allow access to debugging code
*/
copyinstr(fromaddr, toaddr, maxlength, lencopied) u_int *lencopied, maxlength;
void *toaddr, *fromaddr; {
int c,tally;
tally = 0;
while (maxlength--) {
c = fubyte(fromaddr++);
if (c == -1) {
if(lencopied) *lencopied = tally;
return(EFAULT);
}
tally++;
*(char *)toaddr++ = (char) c;
if (c == 0){
if(lencopied) *lencopied = (u_int)tally;
return(0);
}
}
if(lencopied) *lencopied = (u_int)tally;
return(ENAMETOOLONG);
}
copyoutstr(fromaddr, toaddr, maxlength, lencopied) u_int *lencopied, maxlength;
void *fromaddr, *toaddr; {
int c;
int tally;
tally = 0;
while (maxlength--) {
c = subyte(toaddr++, *(char *)fromaddr);
if (c == -1) return(EFAULT);
tally++;
if (*(char *)fromaddr++ == 0){
if(lencopied) *lencopied = tally;
return(0);
}
}
if(lencopied) *lencopied = tally;
return(ENAMETOOLONG);
}
#endif /* SLOW_OLD_COPYSTRS */
copystr(fromaddr, toaddr, maxlength, lencopied) u_int *lencopied, maxlength;
void *fromaddr, *toaddr; {
u_int tally;
tally = 0;
while (maxlength--) {
*(u_char *)toaddr = *(u_char *)fromaddr++;
tally++;
if (*(u_char *)toaddr++ == 0) {
if(lencopied) *lencopied = tally;
return(0);
}
}
if(lencopied) *lencopied = tally;
return(ENAMETOOLONG);
}
#endif
#include "ddb.h"
#if NDDB <= 0
void

14
sys/i386/i386/mem.c
View file

@ -38,7 +38,7 @@
*
* from: Utah $Hdr: mem.c 1.13 89/10/08$
* from: @(#)mem.c 7.2 (Berkeley) 5/9/91
* $Id: mem.c,v 1.5 1993/11/25 01:30:59 wollman Exp $
* $Id: mem.c,v 1.6 1993/12/19 00:50:06 wollman Exp $
*/
/*
@ -70,12 +70,12 @@ mmclose(dev, uio, flags)
struct uio *uio;
int flags;
{
struct syscframe *fp;
struct trapframe *fp;
switch (minor(dev)) {
case 14:
fp = (struct syscframe *)curproc->p_regs;
fp->sf_eflags &= ~PSL_IOPL;
fp = (struct trapframe *)curproc->p_regs;
fp->tf_eflags &= ~PSL_IOPL;
break;
default:
break;
@ -89,12 +89,12 @@ mmopen(dev, uio, flags)
struct uio *uio;
int flags;
{
struct syscframe *fp;
struct trapframe *fp;
switch (minor(dev)) {
case 14:
fp = (struct syscframe *)curproc->p_regs;
fp->sf_eflags |= PSL_IOPL;
fp = (struct trapframe *)curproc->p_regs;
fp->tf_eflags |= PSL_IOPL;
break;
default:
break;

61
sys/i386/i386/trap.c
View file

@ -34,7 +34,7 @@
* SUCH DAMAGE.
*
* from: @(#)trap.c 7.4 (Berkeley) 5/13/91
* $Id: trap.c,v 1.11 1993/12/12 12:22:57 davidg Exp $
* $Id: trap.c,v 1.12 1993/12/19 00:50:09 wollman Exp $
*/
/*
@ -179,7 +179,6 @@ if(curpcb == 0 || curproc == 0) goto we_re_toast;
if (ISPL(frame.tf_cs) == SEL_UPL) {
type |= T_USER;
p->p_regs = (int *)&frame;
curpcb->pcb_flags |= FM_TRAP; /* used by sendsig */
}
ucode=0;
@ -487,7 +486,6 @@ if(curpcb == 0 || curproc == 0) goto we_re_toast;
}
}
curpri = p->p_pri;
curpcb->pcb_flags &= ~FM_TRAP; /* used by sendsig */
}
/*
@ -575,7 +573,7 @@ int trapwrite(addr)
/*ARGSUSED*/
void
syscall(frame)
volatile struct syscframe frame;
volatile struct trapframe frame;
{
register int *locr0 = ((int *)&frame);
register caddr_t params;
@ -591,29 +589,30 @@ syscall(frame)
r0 = 0; r0 = r0; r1 = 0; r1 = r1;
#endif
syst = p->p_stime;
if (ISPL(frame.sf_cs) != SEL_UPL)
if (ISPL(frame.tf_cs) != SEL_UPL)
panic("syscall");
code = frame.sf_eax;
curpcb->pcb_flags &= ~FM_TRAP; /* used by sendsig */
code = frame.tf_eax;
p->p_regs = (int *)&frame;
params = (caddr_t)frame.sf_esp + sizeof (int) ;
params = (caddr_t)frame.tf_esp + sizeof (int) ;
/*
* Reconstruct pc, assuming lcall $X,y is 7 bytes, as it is always.
*/
opc = frame.sf_eip - 7;
callp = (code >= nsysent) ? &sysent[63] : &sysent[code];
if (callp == sysent) {
i = fuword(params);
opc = frame.tf_eip - 7;
if (code == 0) {
code = fuword(params);
params += sizeof (int);
callp = (code >= nsysent) ? &sysent[63] : &sysent[code];
}
if (code < 0 || code >= nsysent)
callp = &sysent[0];
else
callp = &sysent[code];
if ((i = callp->sy_narg * sizeof (int)) &&
(error = copyin(params, (caddr_t)args, (u_int)i))) {
frame.sf_eax = error;
frame.sf_eflags |= PSL_C; /* carry bit */
frame.tf_eax = error;
frame.tf_eflags |= PSL_C; /* carry bit */
#ifdef KTRACE
if (KTRPOINT(p, KTR_SYSCALL))
ktrsyscall(p->p_tracep, code, callp->sy_narg, args);
@ -625,20 +624,20 @@ syscall(frame)
ktrsyscall(p->p_tracep, code, callp->sy_narg, args);
#endif
rval[0] = 0;
rval[1] = frame.sf_edx;
rval[1] = frame.tf_edx;
/*pg("%d. s %d\n", p->p_pid, code);*/
error = (*callp->sy_call)(p, args, rval);
if (error == ERESTART)
frame.sf_eip = opc;
frame.tf_eip = opc;
else if (error != EJUSTRETURN) {
if (error) {
/*pg("error %d", error);*/
frame.sf_eax = error;
frame.sf_eflags |= PSL_C; /* carry bit */
frame.tf_eax = error;
frame.tf_eflags |= PSL_C; /* carry bit */
} else {
frame.sf_eax = rval[0];
frame.sf_edx = rval[1];
frame.sf_eflags &= ~PSL_C; /* carry bit */
frame.tf_eax = rval[0];
frame.tf_edx = rval[1];
frame.tf_eflags &= ~PSL_C; /* carry bit */
}
}
/* else if (error == EJUSTRETURN) */
@ -679,10 +678,10 @@ syscall(frame)
if (ticks) {
#ifdef PROFTIMER
extern int profscale;
addupc(frame.sf_eip, &p->p_stats->p_prof,
addupc(frame.tf_eip, &p->p_stats->p_prof,
ticks * profscale);
#else
addupc(frame.sf_eip, &p->p_stats->p_prof, ticks);
addupc(frame.tf_eip, &p->p_stats->p_prof, ticks);
#endif
}
}
@ -693,13 +692,13 @@ syscall(frame)
#endif
#ifdef DIAGNOSTICx
{ extern int _udatasel, _ucodesel;
if (frame.sf_ss != _udatasel)
printf("ss %x call %d\n", frame.sf_ss, code);
if ((frame.sf_cs&0xffff) != _ucodesel)
printf("cs %x call %d\n", frame.sf_cs, code);
if (frame.sf_eip > VM_MAXUSER_ADDRESS) {
printf("eip %x call %d\n", frame.sf_eip, code);
frame.sf_eip = 0;
if (frame.tf_ss != _udatasel)
printf("ss %x call %d\n", frame.tf_ss, code);
if ((frame.tf_cs&0xffff) != _ucodesel)
printf("cs %x call %d\n", frame.tf_cs, code);
if (frame.tf_eip > VM_MAXUSER_ADDRESS) {
printf("eip %x call %d\n", frame.tf_eip, code);
frame.tf_eip = 0;
}
}
#endif

25
sys/i386/include/frame.h
View file

@ -34,7 +34,7 @@
* SUCH DAMAGE.
*
* from: @(#)frame.h 5.2 (Berkeley) 1/18/91
* $Id: frame.h,v 1.5 1993/12/03 05:10:00 alm Exp $
* $Id: frame.h,v 1.6 1993/12/19 00:50:15 wollman Exp $
*/
#ifndef _MACHINE_FRAME_H_
@ -113,28 +113,5 @@ struct sigframe {
int sf_edx;
int sf_ecx;
struct sigcontext sf_sc;
} ;
/*
* Call Gate/System Call Stack Frame
*/
struct syscframe {
int sf_edi;
int sf_esi;
int sf_ebp;
int :32; /* redundant save of isp */
int sf_ebx;
int sf_edx;
int sf_ecx;
int sf_eax;
int sf_eflags;
/* below portion defined in 386 hardware */
/* int sf_args[N];*/ /* if call gate copy args enabled!*/
int sf_eip;
int sf_cs;
/* below only when transitting rings (e.g. user to kernel) */
int sf_esp;
int sf_ss;
};
#endif /* _MACHINE_FRAME_H_ */

3
sys/i386/include/pcb.h
View file

@ -34,7 +34,7 @@
* SUCH DAMAGE.
*
* from: @(#)pcb.h 5.10 (Berkeley) 5/12/91
* $Id: pcb.h,v 1.2 1993/10/08 20:51:00 rgrimes Exp $
* $Id: pcb.h,v 1.3 1993/11/07 17:42:59 wollman Exp $
*/
#ifndef _I386_PCB_H_
@ -72,7 +72,6 @@ struct pcb {
#define FP_NEEDSRESTORE 0x04 /* ... that needs restore on next DNA fault */
#endif
#define FP_USESEMC 0x08 /* process uses EMC memory-mapped mode */
#define FM_TRAP 0x10 /* process entered kernel on a trap frame */
#define FP_SOFTFP 0x20 /* process using software fltng pnt emulator */
short pcb_iml; /* interrupt mask level */
caddr_t pcb_onfault; /* copyin/out fault recovery */

24
sys/i386/include/reg.h
View file

@ -34,7 +34,7 @@
* SUCH DAMAGE.
*
* from: @(#)reg.h 5.5 (Berkeley) 1/18/91
* $Id: reg.h,v 1.4 1993/11/16 09:54:57 davidg Exp $
* $Id: reg.h,v 1.5 1993/12/03 05:10:08 alm Exp $
*/
#ifndef _MACHINE_REG_H_
@ -68,28 +68,6 @@
#define tESP (15)
#define tSS (16)
/* During a system call, registers are at these offsets instead of above. */
#define sEDI (0)
#define sESI (1)
#define sEBP (2)
#define sEBX (4)
#define sEDX (5)
#define sECX (6)
#define sEAX (7)
#define sEFLAGS (8)
#define sEIP (9)
#define sCS (10)
#define sESP (11)
#define sSS (12)
#define PC sEIP
#define SP sESP
#define PS sEFLAGS
#define R0 sEDX
#define R1 sECX
/*
* Registers accessible to ptrace(2) syscall for debugger
* The machine-dependent code for PT_{SET,GET}REGS needs to

4
sys/i386/isa/npx.c
View file

@ -32,7 +32,7 @@
* SUCH DAMAGE.
*
* from: @(#)npx.c 7.2 (Berkeley) 5/12/91
* $Id: npx.c,v 1.4 1993/11/03 00:29:19 paul Exp $
* $Id: npx.c,v 1.5 1993/11/03 23:32:35 paul Exp $
*/
#include "npx.h"
@ -439,7 +439,6 @@ npxintr(frame)
* just before it is used).
*/
curproc->p_regs = (int *)&frame.if_es;
curpcb->pcb_flags |= FM_TRAP; /* used by sendsig */
#ifdef notyet
/*
* Encode the appropriate code for detailed information on
@ -450,7 +449,6 @@ npxintr(frame)
code = 0; /* XXX */
#endif
trapsignal(curproc, SIGFPE, code);
curpcb->pcb_flags &= ~FM_TRAP;
} else {
/*
* Nested interrupt. These losers occur when:

8
sys/i386/isa/syscons.c
View file

@ -35,7 +35,7 @@
*
* from: @(#)pccons.c 5.11 (Berkeley) 5/21/91
* from: @(#)syscons.c 1.1 931021
* $Id: syscons.c,v 1.22 1993/12/21 02:49:13 rich Exp $
* $Id: syscons.c,v 1.23 1993/12/21 03:27:26 rich Exp $
*
* Heavily modified by Søren Schmidt (sos@login.dkuug.dk) to provide:
*
@ -526,14 +526,8 @@ pcparam(struct tty *tp, struct termios *t)
return(0);
}
#if defined(NetBSD)
#define frametype struct trapframe
#define eflags tf_eflags
#else
#define frametype struct syscframe
#define eflags sf_eflags
#endif
int
pcioctl(dev_t dev, int cmd, caddr_t data, int flag, struct proc *p)

8
sys/isa/syscons.c
View file

@ -35,7 +35,7 @@
*
* from: @(#)pccons.c 5.11 (Berkeley) 5/21/91
* from: @(#)syscons.c 1.1 931021
* $Id: syscons.c,v 1.22 1993/12/21 02:49:13 rich Exp $
* $Id: syscons.c,v 1.23 1993/12/21 03:27:26 rich Exp $
*
* Heavily modified by Søren Schmidt (sos@login.dkuug.dk) to provide:
*
@ -526,14 +526,8 @@ pcparam(struct tty *tp, struct termios *t)
return(0);
}
#if defined(NetBSD)
#define frametype struct trapframe
#define eflags tf_eflags
#else
#define frametype struct syscframe
#define eflags sf_eflags
#endif
int
pcioctl(dev_t dev, int cmd, caddr_t data, int flag, struct proc *p)

61
sys/kern/subr_trap.c
View file

@ -34,7 +34,7 @@
* SUCH DAMAGE.
*
* from: @(#)trap.c 7.4 (Berkeley) 5/13/91
* $Id: trap.c,v 1.11 1993/12/12 12:22:57 davidg Exp $
* $Id: trap.c,v 1.12 1993/12/19 00:50:09 wollman Exp $
*/
/*
@ -179,7 +179,6 @@ if(curpcb == 0 || curproc == 0) goto we_re_toast;
if (ISPL(frame.tf_cs) == SEL_UPL) {
type |= T_USER;
p->p_regs = (int *)&frame;
curpcb->pcb_flags |= FM_TRAP; /* used by sendsig */
}
ucode=0;
@ -487,7 +486,6 @@ if(curpcb == 0 || curproc == 0) goto we_re_toast;
}
}
curpri = p->p_pri;
curpcb->pcb_flags &= ~FM_TRAP; /* used by sendsig */
}
/*
@ -575,7 +573,7 @@ int trapwrite(addr)
/*ARGSUSED*/
void
syscall(frame)
volatile struct syscframe frame;
volatile struct trapframe frame;
{
register int *locr0 = ((int *)&frame);
register caddr_t params;
@ -591,29 +589,30 @@ syscall(frame)
r0 = 0; r0 = r0; r1 = 0; r1 = r1;
#endif
syst = p->p_stime;
if (ISPL(frame.sf_cs) != SEL_UPL)
if (ISPL(frame.tf_cs) != SEL_UPL)
panic("syscall");
code = frame.sf_eax;
curpcb->pcb_flags &= ~FM_TRAP; /* used by sendsig */
code = frame.tf_eax;
p->p_regs = (int *)&frame;
params = (caddr_t)frame.sf_esp + sizeof (int) ;
params = (caddr_t)frame.tf_esp + sizeof (int) ;
/*
* Reconstruct pc, assuming lcall $X,y is 7 bytes, as it is always.
*/
opc = frame.sf_eip - 7;
callp = (code >= nsysent) ? &sysent[63] : &sysent[code];
if (callp == sysent) {
i = fuword(params);
opc = frame.tf_eip - 7;
if (code == 0) {
code = fuword(params);
params += sizeof (int);
callp = (code >= nsysent) ? &sysent[63] : &sysent[code];
}
if (code < 0 || code >= nsysent)
callp = &sysent[0];
else
callp = &sysent[code];
if ((i = callp->sy_narg * sizeof (int)) &&
(error = copyin(params, (caddr_t)args, (u_int)i))) {
frame.sf_eax = error;
frame.sf_eflags |= PSL_C; /* carry bit */
frame.tf_eax = error;
frame.tf_eflags |= PSL_C; /* carry bit */
#ifdef KTRACE
if (KTRPOINT(p, KTR_SYSCALL))
ktrsyscall(p->p_tracep, code, callp->sy_narg, args);
@ -625,20 +624,20 @@ syscall(frame)
ktrsyscall(p->p_tracep, code, callp->sy_narg, args);
#endif
rval[0] = 0;
rval[1] = frame.sf_edx;
rval[1] = frame.tf_edx;
/*pg("%d. s %d\n", p->p_pid, code);*/
error = (*callp->sy_call)(p, args, rval);
if (error == ERESTART)
frame.sf_eip = opc;
frame.tf_eip = opc;
else if (error != EJUSTRETURN) {
if (error) {
/*pg("error %d", error);*/
frame.sf_eax = error;
frame.sf_eflags |= PSL_C; /* carry bit */
frame.tf_eax = error;
frame.tf_eflags |= PSL_C; /* carry bit */
} else {
frame.sf_eax = rval[0];
frame.sf_edx = rval[1];
frame.sf_eflags &= ~PSL_C; /* carry bit */
frame.tf_eax = rval[0];
frame.tf_edx = rval[1];
frame.tf_eflags &= ~PSL_C; /* carry bit */
}
}
/* else if (error == EJUSTRETURN) */
@ -679,10 +678,10 @@ syscall(frame)
if (ticks) {
#ifdef PROFTIMER
extern int profscale;
addupc(frame.sf_eip, &p->p_stats->p_prof,
addupc(frame.tf_eip, &p->p_stats->p_prof,
ticks * profscale);
#else
addupc(frame.sf_eip, &p->p_stats->p_prof, ticks);
addupc(frame.tf_eip, &p->p_stats->p_prof, ticks);
#endif
}
}
@ -693,13 +692,13 @@ syscall(frame)
#endif
#ifdef DIAGNOSTICx
{ extern int _udatasel, _ucodesel;
if (frame.sf_ss != _udatasel)
printf("ss %x call %d\n", frame.sf_ss, code);
if ((frame.sf_cs&0xffff) != _ucodesel)
printf("cs %x call %d\n", frame.sf_cs, code);
if (frame.sf_eip > VM_MAXUSER_ADDRESS) {
printf("eip %x call %d\n", frame.sf_eip, code);
frame.sf_eip = 0;
if (frame.tf_ss != _udatasel)
printf("ss %x call %d\n", frame.tf_ss, code);
if ((frame.tf_cs&0xffff) != _ucodesel)
printf("cs %x call %d\n", frame.tf_cs, code);
if (frame.tf_eip > VM_MAXUSER_ADDRESS) {
printf("eip %x call %d\n", frame.tf_eip, code);
frame.tf_eip = 0;
}
}
#endif