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darling-gdb/sim/arm/kid.c
Steve Chamberlain 2494eaf6fd Wed May 24 14:37:31 1995 Steve Chamberlain <sac@slash.cygnus.com> 
* New.
1995-05-24 21:45:01 +00:00

511 lines
15 KiB
C
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/* kid.c -- ARMulator RDP/RDI interface: ARM6 Instruction Emulator.
Copyright (C) 1994 Advanced RISC Machines Ltd.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
/*****************************************************************/
/* The child process continues here... */
/* It waits on a pipe from the parent and translates the RDP */
/* messages into RDI calls to the ARMulator passing RDP replies */
/* back up a pipe to the parent. */
/*****************************************************************/
#include <sys/types.h>
#include <signal.h>
#include "armdefs.h"
#include "dbg_conf.h"
#include "dbg_hif.h"
#include "dbg_rdi.h"
#include "gdbhost.h"
#include "communicate.h"
/* The pipes between the two processes */
extern int mumkid[2];
extern int kidmum[2];
/* The maximum number of file descriptors */
extern int nfds;
/* The machine name */
#define MAXHOSTNAMELENGTH 64
extern char localhost[MAXHOSTNAMELENGTH + 1];
/* The socket number */
extern unsigned int socketnumber;
/* RDI interface */
extern const struct RDIProcVec armul_rdi;
static int MYrdp_level = 0;
static int rdi_state = 0;
/**************************************************************/
/* Signal handler that terminates excecution in the ARMulator */
/**************************************************************/
void kid_handlesignal(int sig) {
#ifdef DEBUG
fprintf(stderr, "Terminate ARMulator excecution\n");
#endif
if (sig != SIGUSR1) {
fprintf(stderr, "Unsupported signal.\n");
return;
}
armul_rdi.info(RDISignal_Stop, (unsigned long *) 0, (unsigned long *) 0);
}
/********************************************************************/
/* Waits on a pipe from the socket demon for RDP and */
/* acts as an RDP to RDI interpreter on the front of the ARMulator. */
/********************************************************************/
void kid() {
char *p, *q;
int i, j, k;
long outofthebag;
unsigned char c, d, message;
ARMword x, y, z;
struct sigaction action;
PointHandle point;
Dbg_ConfigBlock config;
Dbg_HostosInterface hostif;
struct Dbg_MCState *MCState;
char command_line[256];
struct fd_set readfds;
/* Setup a signal handler for SIGUSR1 */
action.sa_handler = kid_handlesignal;
action.sa_mask = 0;
action.sa_flags = 0;
sigaction(SIGUSR1, &action, (struct sigaction *) 0);
while (1)
{
/* Wait for ever */
FD_ZERO(&readfds);
FD_SET(mumkid[0], &readfds);
i = select(nfds, &readfds,
(fd_set *) 0,
(fd_set *) 0,
(struct timeval *) 0);
if (i < 0) {
perror("select");
}
if (read(mumkid[0], &message, 1) < 1) {
perror("read");
}
switch (message) {
case RDP_Start :
/* Open and/or Initialise */
BAG_newbag();
MYread_char(mumkid[0], &c); /* type */
MYread_word(mumkid[0], &x); /* memorysize */
if (c & 0x2) MYread_char(mumkid[0], &d); /* speed */
config.processor = 0;
config.memorysize = x;
config.bytesex = (c & 0x4) ? RDISex_Big : RDISex_Little;
if (c & 0x8) config.bytesex = RDISex_DontCare;
hostif.dbgprint = myprint;
hostif.dbgpause = mypause;
hostif.dbgarg = stdout;
hostif.writec = mywritec;
hostif.readc = myreadc;
hostif.write = mywrite;
hostif.gets = mygets;
hostif.reset = mypause; /* do nothing */
hostif.resetarg = "Do I love resetting or what!\n";
if (rdi_state)
{
/* we have restarted, so kill off the existing run. */
/* armul_rdi.close(); */
}
i = armul_rdi.open(c & 0x3, &config, &hostif, MCState);
rdi_state = 1;
MYwrite_char(kidmum[1], RDP_Return);
MYwrite_char(kidmum[1], (unsigned char) i);
x = ~0x4;
armul_rdi.info(RDIVector_Catch, &x, 0);
break;
case RDP_End :
/* Close and Finalise */
i = armul_rdi.close();
rdi_state = 0;
MYwrite_char(kidmum[1], RDP_Return);
MYwrite_char(kidmum[1], (unsigned char) i);
break;
case RDP_Read :
/* Read Memory Address */
MYread_word(mumkid[0], &x); /* address */
MYread_word(mumkid[0], &y); /* nbytes */
p = (char *) malloc(y);
i = armul_rdi.read(x, p, (unsigned *) &y);
MYwrite_char(kidmum[1], RDP_Return);
for (k = 0; k < y; k++)
MYwrite_char(kidmum[1], p[k]);
free(p);
MYwrite_char(kidmum[1], (unsigned char) i);
if (i)
MYwrite_word(kidmum[1], y); /* number of bytes sent without error */
break;
case RDP_Write :
/* Write Memory Address */
MYread_word(mumkid[0], &x); /* address */
MYread_word(mumkid[0], &y); /* nbytes */
p = (char *) malloc(y);
for (k = 0; k < y; k++)
MYread_char(mumkid[0], &p[k]);
i = armul_rdi.write(p, x, (unsigned *) &y);
free(p);
MYwrite_char(kidmum[1], RDP_Return);
MYwrite_char(kidmum[1], (unsigned char) i);
if (i)
MYwrite_word(kidmum[1], y); /* number of bytes sent without error */
break;
case RDP_CPUread :
/* Read CPU State */
MYread_char(mumkid[0], &c); /* mode */
MYread_word(mumkid[0], &x); /* mask */
p = (char *) malloc(4 * RDINumCPURegs);
i = armul_rdi.CPUread(c, x, (ARMword *) p);
MYwrite_char(kidmum[1], RDP_Return);
for (k = 1, j = 0; k != 0x80000000; k *= 2)
if (k & x) MYwrite_word(kidmum[1], ((ARMword *) p)[j++]);
free(p);
if (i) MYwrite_char(kidmum[1], (unsigned char) j);
MYwrite_char(kidmum[1], (unsigned char) i);
break;
case RDP_CPUwrite :
/* Write CPU State */
MYread_char(mumkid[0], &c); /* mode */
MYread_word(mumkid[0], &x); /* mask */
p = (char *) malloc(4 * RDINumCPURegs);
for (k = 1, j = 0; k != 0x80000000; k *= 2)
if (k & x) MYread_word(mumkid[0], &(((ARMword *) p)[j++]));
i = armul_rdi.CPUwrite(c, x, (ARMword *) p);
MYwrite_char(kidmum[1], RDP_Return);
MYwrite_char(kidmum[1], (unsigned char) i);
free(p);
break;
case RDP_CPread :
/* Read Co-Processor State */
MYread_char(mumkid[0], &c); /* CPnum */
MYread_word(mumkid[0], &x); /* mask */
p = q = (char *) malloc(16 * RDINumCPRegs);
i = armul_rdi.CPread(c, x, (ARMword *) p);
MYwrite_char(kidmum[1], RDP_Return);
for (k = 1, j = 0; k != 0x80000000; k *= 2, j++)
if (k & x) {
if ((c == 1 || c == 2) && k <= 128) {
MYwrite_FPword(kidmum[1], q);
q += 16;
}
else {
MYwrite_word(kidmum[1], *q);
q += 4;
}
}
free(p);
if (i) MYwrite_char(kidmum[1], (unsigned char) j);
MYwrite_char(kidmum[1], (unsigned char) i);
break;
case RDP_CPwrite :
/* Write Co-Processor State */
MYread_char(mumkid[0], &c); /* CPnum */
MYread_word(mumkid[0], &x); /* mask */
p = q = (char *) malloc(16 * RDINumCPURegs);
for (k = 1, j = 0; k != 0x80000000; k *= 2, j++)
if (k & x) {
if ((c == 1 || c == 2) && k <= 128) {
MYread_FPword(kidmum[1], q);
q += 16;
}
else {
MYread_word(mumkid[0], (ARMword *) q);
q += 4;
}
}
i = armul_rdi.CPwrite(c, x, (ARMword *) p);
MYwrite_char(kidmum[1], RDP_Return);
MYwrite_char(kidmum[1], (unsigned char) i);
free(p);
break;
case RDP_SetBreak :
/* Set Breakpoint */
MYread_word(mumkid[0], &x); /* address */
MYread_char(mumkid[0], &c); /* type */
if ((c & 0xf) >= 5) MYread_word(mumkid[0], &y); /* bound */
i = armul_rdi.setbreak(x, c, y, &point);
if (!MYrdp_level) BAG_putpair((long) x, (long) point);
MYwrite_char(kidmum[1], RDP_Return);
if (MYrdp_level) MYwrite_word(kidmum[1], point);
MYwrite_char(kidmum[1], (unsigned char) i);
break;
case RDP_ClearBreak :
/* Clear Breakpoint */
MYread_word(mumkid[0], &point); /* PointHandle */
if (!MYrdp_level) {
BAG_getsecond((long) point, &outofthebag); /* swap pointhandle for address */
BAG_killpair_byfirst(outofthebag);
point = outofthebag;
}
i = armul_rdi.clearbreak(point);
MYwrite_char(kidmum[1], RDP_Return);
MYwrite_char(kidmum[1], (unsigned char) i);
break;
case RDP_SetWatch :
/* Set Watchpoint */
MYread_word(mumkid[0], &x); /* address */
MYread_char(mumkid[0], &c); /* type */
MYread_char(mumkid[0], &d); /* datatype */
if ((c & 0xf) >= 5) MYread_word(mumkid[0], &y); /* bound */
i = armul_rdi.setwatch(x, c, d, y, &point);
MYwrite_char(kidmum[1], RDP_Return);
MYwrite_word(kidmum[1], point);
MYwrite_char(kidmum[1], (unsigned char) i);
break;
case RDP_ClearWatch :
/* Clear Watchpoint */
MYread_word(mumkid[0], &point); /* PointHandle */
i = armul_rdi.clearwatch(point);
MYwrite_char(kidmum[1], RDP_Return);
MYwrite_char(kidmum[1], (unsigned char) i);
break;
case RDP_Execute :
/* Excecute */
MYread_char(mumkid[0], &c); /* return */
#ifdef DEBUG
fprintf(stderr, "Starting execution\n");
#endif
i = armul_rdi.execute(&point);
#ifdef DEBUG
fprintf(stderr, "Completed execution\n");
#endif
MYwrite_char(kidmum[1], RDP_Return);
if (c & 0x80) MYwrite_word(kidmum[1], point);
MYwrite_char(kidmum[1], (unsigned char) i);
break;
case RDP_Step :
/* Step */
MYread_char(mumkid[0], &c); /* return */
MYread_word(mumkid[0], &x); /* ninstr */
point = 0x87654321;
i = armul_rdi.step(x, &point);
MYwrite_char(kidmum[1], RDP_Return);
if (c & 0x80) MYwrite_word(kidmum[1], point);
MYwrite_char(kidmum[1], (unsigned char) i);
break;
case RDP_Info:
/* Info */
MYread_word (mumkid[0], &x);
switch (x)
{
case RDIInfo_Target:
i = armul_rdi.info (RDIInfo_Target, &y, &z);
MYwrite_char (kidmum[1], RDP_Return);
MYwrite_word (kidmum[1], y); /* Loads of info... */
MYwrite_word (kidmum[1], z); /* Model */
MYwrite_char (kidmum[1], (unsigned char) i);
break;
case RDISet_RDILevel:
MYread_word (mumkid[0], &x); /* arg1, debug level */
i = armul_rdi.info (RDISet_RDILevel, &x, 0);
if (i == RDIError_NoError)
MYrdp_level = x;
MYwrite_char (kidmum[1], RDP_Return);
MYwrite_char (kidmum[1], (unsigned char) i);
break;
case RDISet_Cmdline:
for (p = command_line; MYread_char (mumkid[0], p), *p; p++)
; /* String */
i = armul_rdi.info (RDISet_Cmdline,
(unsigned long *) command_line, 0);
MYwrite_char (kidmum[1], RDP_Return);
MYwrite_char (kidmum[1], (unsigned char) i);
break;
case RDIInfo_Step:
i = armul_rdi.info (RDIInfo_Step, &x, 0);
MYwrite_char (kidmum[1], RDP_Return);
MYwrite_word (kidmum[1], x);
MYwrite_char (kidmum[1], (unsigned char) i);
break;
case RDIVector_Catch:
MYread_word (mumkid[0], &x);
i = armul_rdi.info (RDIVector_Catch, &x, 0);
MYwrite_char (kidmum[1], RDP_Return);
MYwrite_char (kidmum[1], i);
break;
case RDIInfo_Points:
i = armul_rdi.info (RDIInfo_Points, &x, 0);
MYwrite_char (kidmum[1], RDP_Return);
MYwrite_word (kidmum[1], x);
MYwrite_char (kidmum[1], (unsigned char) i);
break;
default:
fprintf (stderr, "Unsupported info code %d\n", x);
break;
}
break;
case RDP_OSOpReply:
/* OS Operation Reply */
MYwrite_char (kidmum[1], RDP_Fatal);
break;
case RDP_Reset:
/* Reset */
for (i = 0; i < 50; i++)
MYwrite_char(kidmum[1], RDP_Reset);
p = (char *) malloc(MAXHOSTNAMELENGTH + 5 + 20);
sprintf(p, "Running on %s:%d\n", localhost, socketnumber);
MYwrite_string(kidmum[1], p);
free(p);
break;
default:
fprintf (stderr, "Oh dear: Something is seriously wrong :-(\n");
/* Hmm.. bad RDP operation */
break;
}
}
}
/* Handles memory read operations until an OS Operation Reply Message is */
/* encounterd. It then returns the byte info value (0, 1, or 2) and fills */
/* in 'putinr0' with the data if appropriate. */
int wait_for_osreply(ARMword *reply)
{
char *p, *q;
int i, j, k;
unsigned char c, d, message;
ARMword x, y, z;
struct sigaction action;
PointHandle point;
Dbg_ConfigBlock config;
Dbg_HostosInterface hostif;
struct Dbg_MCState *MCState;
char command_line[256];
struct fd_set readfds;
#ifdef DEBUG
fprintf(stderr, "wait_for_osreply ().\n");
#endif
/* Setup a signal handler for SIGUSR1 */
action.sa_handler = kid_handlesignal;
action.sa_mask = 0;
action.sa_flags = 0;
sigaction(SIGUSR1, &action, (struct sigaction *) 0);
while (1)
{
/* Wait for ever */
FD_ZERO(&readfds);
FD_SET(mumkid[0], &readfds);
i = select(nfds, &readfds,
(fd_set *) 0,
(fd_set *) 0,
(struct timeval *) 0);
if (i < 0) {
perror("select");
}
if (read(mumkid[0], &message, 1) < 1) {
perror("read");
}
switch (message) {
case RDP_Read :
/* Read Memory Address */
MYread_word(mumkid[0], &x); /* address */
MYread_word(mumkid[0], &y); /* nbytes */
p = (char *) malloc(y);
i = armul_rdi.read(x, p, (unsigned *) &y);
MYwrite_char(kidmum[1], RDP_Return);
for (k = 0; k < y; k++)
MYwrite_char(kidmum[1], p[k]);
free(p);
MYwrite_char(kidmum[1], (unsigned char) i);
if (i)
MYwrite_word(kidmum[1], y); /* number of bytes sent without error */
break;
case RDP_Write :
/* Write Memory Address */
MYread_word(mumkid[0], &x); /* address */
MYread_word(mumkid[0], &y); /* nbytes */
p = (char *) malloc(y);
for (k = 0; k < y; k++)
MYread_char(mumkid[0], &p[k]);
i = armul_rdi.write(p, x, (unsigned *) &y);
free(p);
MYwrite_char(kidmum[1], RDP_Return);
MYwrite_char(kidmum[1], (unsigned char) i);
if (i)
MYwrite_word(kidmum[1], y); /* number of bytes sent without error */
break;
case RDP_OSOpReply :
/* OS Operation Reply */
MYread_char(mumkid[0], &c);
if (c == 1) MYread_char(mumkid[0], (char *) reply);
if (c == 2) MYread_word(mumkid[0], reply);
return c;
break;
default :
fprintf(stderr, "HELP! Unaccounted-for message during OS request. \n");
MYwrite_char(kidmum[1], RDP_Fatal);
}
}
}
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