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* config/m32r/m32r.mt (GDBSERVER_LIBS): Added ../../intl/libintl.a.

Browse Source 
* config/mips/vr5000.mt (GDBSERVER_LIBS): Likewise.
* config/tic80/tic80.mt (GDBSERVER_LIBS): Likewise.
* gdbserver/low-sim.c (#include "defs.h"): Removed.
(mygeneric_load): Rename from generic_load.

* gdbserver/low-hppabsd.c (#include "server.h"): Added.
(#include "defs.h"): Removed.
(inferior_pid, perror_with_name): Remove declarations.
* gdbserver/low-linux.c: Likewise.
* gdbserver/low-nbsd.c: Likewise.
* gdbserver/low-sparc.c: Likewise.
* gdbserver/low-sun3.c: Likewise.

* i386-stub.c: Re-indent.
* m68k-stub.c: Re-indent.
This commit is contained in:
J.T. Conklin
2001-01-23 19:45:12 +00:00
parent 329de80343
commit f29d9b6d30
12 changed files with 731 additions and 597 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
gdb/ChangeLog
View File

@ -1,3 +1,22 @@
2001-01-23 J.T. Conklin <jtc@redback.com>
* config/m32r/m32r.mt (GDBSERVER_LIBS): Added ../../intl/libintl.a.
* config/mips/vr5000.mt (GDBSERVER_LIBS): Likewise.
* config/tic80/tic80.mt (GDBSERVER_LIBS): Likewise.
* gdbserver/low-sim.c (#include "defs.h"): Removed.
(mygeneric_load): Rename from generic_load.
* gdbserver/low-hppabsd.c (#include "server.h"): Added.
(#include "defs.h"): Removed.
(inferior_pid, perror_with_name): Remove declarations.
* gdbserver/low-linux.c: Likewise.
* gdbserver/low-nbsd.c: Likewise.
* gdbserver/low-sparc.c: Likewise.
* gdbserver/low-sun3.c: Likewise.
* i386-stub.c: Re-indent.
* m68k-stub.c: Re-indent.
2001-01-22 Nicholas Duffek <nsd@redhat.com> 2001-01-22 Nicholas Duffek <nsd@redhat.com>
* gdbarch.sh (PARM_BOUNDARY): Define. * gdbarch.sh (PARM_BOUNDARY): Define.

2
gdb/config/m32r/m32r.mt
View File

@ -4,4 +4,4 @@ TM_FILE= tm-m32r.h
SIM_OBS = remote-sim.o SIM_OBS = remote-sim.o
SIM = ../sim/m32r/libsim.a SIM = ../sim/m32r/libsim.a
GDBSERVER_DEPFILES= low-sim.o GDBSERVER_DEPFILES= low-sim.o
GDBSERVER_LIBS = ../../sim/m32r/libsim.a ../../bfd/libbfd.a ../../libiberty/libiberty.a ../../opcodes/libopcodes.a GDBSERVER_LIBS = ../../sim/m32r/libsim.a ../../bfd/libbfd.a ../../libiberty/libiberty.a ../../opcodes/libopcodes.a ../../intl/libintl.a

2
gdb/config/mips/vr5000.mt
View File

@ -4,4 +4,4 @@ TM_FILE= tm-vr5000.h
SIM_OBS = remote-sim.o SIM_OBS = remote-sim.o
SIM = ../sim/mips/libsim.a SIM = ../sim/mips/libsim.a
GDBSERVER_DEPFILES= low-sim.o GDBSERVER_DEPFILES= low-sim.o
GDBSERVER_LIBS = ../../sim/mips/libsim.a ../../bfd/libbfd.a ../../libiberty/libiberty.a -lm GDBSERVER_LIBS = ../../sim/mips/libsim.a ../../bfd/libbfd.a ../../libiberty/libiberty.a -lm ../../intl/libintl.a

2
gdb/config/tic80/tic80.mt
View File

@ -4,4 +4,4 @@ TM_FILE= tm-tic80.h
SIM_OBS = remote-sim.o SIM_OBS = remote-sim.o
SIM = ../sim/tic80/libsim.a SIM = ../sim/tic80/libsim.a
GDBSERVER_DEPFILES= low-sim.o GDBSERVER_DEPFILES= low-sim.o
GDBSERVER_LIBS = ../../sim/tic80/libsim.a ../../bfd/libbfd.a ../../libiberty/libiberty.a -lm GDBSERVER_LIBS = ../../sim/tic80/libsim.a ../../bfd/libbfd.a ../../libiberty/libiberty.a -lm ../../intl/libintl.a

4
gdb/gdbserver/low-hppabsd.c
View File

@ -18,7 +18,7 @@
Foundation, Inc., 59 Temple Place - Suite 330, Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */ Boston, MA 02111-1307, USA. */
#include "defs.h" #include "server.h"
#include <sys/wait.h> #include <sys/wait.h>
#include "frame.h" #include "frame.h"
#include "inferior.h" #include "inferior.h"
@ -41,8 +41,6 @@ char *registers = my_registers;
#include <machine/reg.h> #include <machine/reg.h>
extern int errno; extern int errno;
extern int inferior_pid;
void perror_with_name ();
/* Start an inferior process and returns its pid. /* Start an inferior process and returns its pid.
ALLARGS is a vector of program-name and args. */ ALLARGS is a vector of program-name and args. */

4
gdb/gdbserver/low-linux.c
View File

@ -18,7 +18,7 @@
Foundation, Inc., 59 Temple Place - Suite 330, Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */ Boston, MA 02111-1307, USA. */
#include "defs.h" #include "server.h"
#include <sys/wait.h> #include <sys/wait.h>
#include "frame.h" #include "frame.h"
#include "inferior.h" #include "inferior.h"
@ -47,8 +47,6 @@ char *registers = my_registers;
#endif #endif
extern int errno; extern int errno;
extern int inferior_pid;
void perror_with_name ();
static void initialize_arch (void); static void initialize_arch (void);

7
gdb/gdbserver/low-nbsd.c
View File

@ -17,7 +17,7 @@ You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include "defs.h" #include "server.h"
#include <sys/types.h> #include <sys/types.h>
#include <sys/wait.h> #include <sys/wait.h>
#include "frame.h" #include "frame.h"
@ -34,11 +34,6 @@ char *registers = my_registers;
#include <sys/ptrace.h> #include <sys/ptrace.h>
#include <machine/reg.h> #include <machine/reg.h>
// extern int sys_nerr;
// extern char **sys_errlist;
extern int inferior_pid;
void perror_with_name ();
#define RF(dst, src) \ #define RF(dst, src) \
memcpy(&registers[REGISTER_BYTE(dst)], &src, sizeof(src)) memcpy(&registers[REGISTER_BYTE(dst)], &src, sizeof(src))

7
gdb/gdbserver/low-sim.c
View File

@ -18,9 +18,8 @@
Foundation, Inc., 59 Temple Place - Suite 330, Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */ Boston, MA 02111-1307, USA. */
#include "defs.h"
#include "bfd.h"
#include "server.h" #include "server.h"
#include "bfd.h"
#include "callback.h" /* GDB simulator callback interface */ #include "callback.h" /* GDB simulator callback interface */
#include "remote-sim.h" /* GDB simulator interface */ #include "remote-sim.h" /* GDB simulator interface */
@ -41,7 +40,7 @@ static SIM_DESC gdbsim_desc = 0;
does not support loading itself. */ does not support loading itself. */
static void static void
generic_load (bfd *loadfile_bfd) mygeneric_load (bfd *loadfile_bfd)
{ {
asection *s; asection *s;
@ -131,7 +130,7 @@ create_inferior (char *program, char **argv)
/* Load the program into the simulator. */ /* Load the program into the simulator. */
if (abfd) if (abfd)
if (sim_load (gdbsim_desc, program, NULL, 0) == SIM_RC_FAIL) if (sim_load (gdbsim_desc, program, NULL, 0) == SIM_RC_FAIL)
generic_load (abfd); mygeneric_load (abfd);
/* Create an inferior process in the simulator. This initializes SP. */ /* Create an inferior process in the simulator. This initializes SP. */
sim_create_inferior (gdbsim_desc, abfd, argv, /* env */ NULL); sim_create_inferior (gdbsim_desc, abfd, argv, /* env */ NULL);

4
gdb/gdbserver/low-sparc.c
View File

@ -18,7 +18,7 @@
Foundation, Inc., 59 Temple Place - Suite 330, Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */ Boston, MA 02111-1307, USA. */
#include "defs.h" #include "server.h"
#include <sys/wait.h> #include <sys/wait.h>
#include "frame.h" #include "frame.h"
#include "inferior.h" #include "inferior.h"
@ -46,8 +46,6 @@ char *registers = my_registers;
extern int sys_nerr; extern int sys_nerr;
extern char **sys_errlist; extern char **sys_errlist;
extern int errno; extern int errno;
extern int inferior_pid;
void perror_with_name ();
/* Start an inferior process and returns its pid. /* Start an inferior process and returns its pid.
ALLARGS is a vector of program-name and args. */ ALLARGS is a vector of program-name and args. */

4
gdb/gdbserver/low-sun3.c
View File

@ -18,7 +18,7 @@
Foundation, Inc., 59 Temple Place - Suite 330, Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */ Boston, MA 02111-1307, USA. */
#include "defs.h" #include "server.h"
#include "<sys/wait.h>" #include "<sys/wait.h>"
#include "frame.h" #include "frame.h"
#include "inferior.h" #include "inferior.h"
@ -43,8 +43,6 @@ char *registers = my_registers;
extern int sys_nerr; extern int sys_nerr;
extern char **sys_errlist; extern char **sys_errlist;
extern int errno; extern int errno;
extern int inferior_pid;
void perror_with_name ();
/* Start an inferior process and returns its pid. /* Start an inferior process and returns its pid.
ALLARGS is a vector of program-name and args. */ ALLARGS is a vector of program-name and args. */

501
gdb/i386-stub.c
View File

@ -429,17 +429,22 @@ asm(" movl _stackPtr, %esp"); /* move to remcom stack area */
asm(" pushl %eax"); /* push exception onto stack */ asm(" pushl %eax"); /* push exception onto stack */
asm(" call _handle_exception"); /* this never returns */ asm(" call _handle_exception"); /* this never returns */
void _returnFromException() void
_returnFromException ()
{ {
return_to_prog (); return_to_prog ();
} }
int hex(ch) int
char ch; hex (ch)
char ch;
{ {
if ((ch >= 'a') && (ch <= 'f')) return (ch-'a'+10); if ((ch >= 'a') && (ch <= 'f'))
if ((ch >= '0') && (ch <= '9')) return (ch-'0'); return (ch - 'a' + 10);
if ((ch >= 'A') && (ch <= 'F')) return (ch-'A'+10); if ((ch >= '0') && (ch <= '9'))
return (ch - '0');
if ((ch >= 'A') && (ch <= 'F'))
return (ch - 'A' + 10);
return (-1); return (-1);
} }
@ -463,7 +468,7 @@ getpacket (void)
while ((ch = getDebugChar ()) != '$') while ((ch = getDebugChar ()) != '$')
; ;
retry: retry:
checksum = 0; checksum = 0;
xmitcsum = -1; xmitcsum = -1;
count = 0; count = 0;
@ -472,7 +477,7 @@ retry:
while (count < BUFMAX) while (count < BUFMAX)
{ {
ch = getDebugChar (); ch = getDebugChar ();
if (ch == '$') if (ch == '$')
goto retry; goto retry;
if (ch == '#') if (ch == '#')
break; break;
@ -494,7 +499,7 @@ retry:
if (remote_debug) if (remote_debug)
{ {
fprintf (stderr, fprintf (stderr,
"bad checksum. My count = 0x%x, sent=0x%x. buf=%s\n", "bad checksum. My count = 0x%x, sent=0x%x. buf=%s\n",
checksum, xmitcsum, buffer); checksum, xmitcsum, buffer);
} }
putDebugChar ('-'); /* failed checksum */ putDebugChar ('-'); /* failed checksum */
@ -520,42 +525,46 @@ retry:
/* send the packet in buffer. */ /* send the packet in buffer. */
void putpacket(buffer) void
unsigned char *buffer; putpacket (unsigned char *buffer)
{ {
unsigned char checksum; unsigned char checksum;
int count; int count;
char ch; char ch;
/* $<packet info>#<checksum>. */ /* $<packet info>#<checksum>. */
do { do
putDebugChar('$'); {
checksum = 0; putDebugChar ('$');
count = 0; checksum = 0;
count = 0;
while (ch=buffer[count]) { while (ch = buffer[count])
putDebugChar(ch); {
checksum += ch; putDebugChar (ch);
count += 1; checksum += ch;
} count += 1;
}
putDebugChar('#'); putDebugChar ('#');
putDebugChar(hexchars[checksum >> 4]); putDebugChar (hexchars[checksum >> 4]);
putDebugChar(hexchars[checksum % 16]); putDebugChar (hexchars[checksum % 16]);
} while (getDebugChar() != '+');
}
while (getDebugChar () != '+');
} }
void debug_error(format, parm) void
char * format; debug_error (format, parm)
char * parm; char *format;
char *parm;
{ {
if (remote_debug) fprintf (stderr,format,parm); if (remote_debug)
fprintf (stderr, format, parm);
} }
/* Address of a routine to RTE to if we get a memory fault. */ /* Address of a routine to RTE to if we get a memory fault. */
static void (*volatile mem_fault_routine)() = NULL; static void (*volatile mem_fault_routine) () = NULL;
/* Indicate to caller of mem2hex or hex2mem that there has been an /* Indicate to caller of mem2hex or hex2mem that there has been an
error. */ error. */
@ -587,80 +596,115 @@ set_char (char *addr, int val)
/* return a pointer to the last char put in buf (null) */ /* return a pointer to the last char put in buf (null) */
/* If MAY_FAULT is non-zero, then we should set mem_err in response to /* If MAY_FAULT is non-zero, then we should set mem_err in response to
a fault; if zero treat a fault like any other fault in the stub. */ a fault; if zero treat a fault like any other fault in the stub. */
char* mem2hex(mem, buf, count, may_fault) char *
char* mem; mem2hex (mem, buf, count, may_fault)
char* buf; char *mem;
int count; char *buf;
int may_fault; int count;
int may_fault;
{ {
int i; int i;
unsigned char ch; unsigned char ch;
if (may_fault) if (may_fault)
mem_fault_routine = set_mem_err; mem_fault_routine = set_mem_err;
for (i=0;i<count;i++) { for (i = 0; i < count; i++)
ch = get_char (mem++); {
if (may_fault && mem_err) ch = get_char (mem++);
return (buf); if (may_fault && mem_err)
*buf++ = hexchars[ch >> 4]; return (buf);
*buf++ = hexchars[ch % 16]; *buf++ = hexchars[ch >> 4];
} *buf++ = hexchars[ch % 16];
*buf = 0; }
if (may_fault) *buf = 0;
mem_fault_routine = NULL; if (may_fault)
return(buf); mem_fault_routine = NULL;
return (buf);
} }
/* convert the hex array pointed to by buf into binary to be placed in mem */ /* convert the hex array pointed to by buf into binary to be placed in mem */
/* return a pointer to the character AFTER the last byte written */ /* return a pointer to the character AFTER the last byte written */
char* hex2mem(buf, mem, count, may_fault) char *
char* buf; hex2mem (buf, mem, count, may_fault)
char* mem; char *buf;
int count; char *mem;
int may_fault; int count;
int may_fault;
{ {
int i; int i;
unsigned char ch; unsigned char ch;
if (may_fault) if (may_fault)
mem_fault_routine = set_mem_err; mem_fault_routine = set_mem_err;
for (i=0;i<count;i++) { for (i = 0; i < count; i++)
ch = hex(*buf++) << 4; {
ch = ch + hex(*buf++); ch = hex (*buf++) << 4;
set_char (mem++, ch); ch = ch + hex (*buf++);
if (may_fault && mem_err) set_char (mem++, ch);
return (mem); if (may_fault && mem_err)
} return (mem);
if (may_fault) }
mem_fault_routine = NULL; if (may_fault)
return(mem); mem_fault_routine = NULL;
return (mem);
} }
/* this function takes the 386 exception vector and attempts to /* this function takes the 386 exception vector and attempts to
translate this number into a unix compatible signal value */ translate this number into a unix compatible signal value */
int computeSignal( exceptionVector ) int
int exceptionVector; computeSignal (int exceptionVector)
{ {
int sigval; int sigval;
switch (exceptionVector) { switch (exceptionVector)
case 0 : sigval = 8; break; /* divide by zero */ {
case 1 : sigval = 5; break; /* debug exception */ case 0:
case 3 : sigval = 5; break; /* breakpoint */ sigval = 8;
case 4 : sigval = 16; break; /* into instruction (overflow) */ break; /* divide by zero */
case 5 : sigval = 16; break; /* bound instruction */ case 1:
case 6 : sigval = 4; break; /* Invalid opcode */ sigval = 5;
case 7 : sigval = 8; break; /* coprocessor not available */ break; /* debug exception */
case 8 : sigval = 7; break; /* double fault */ case 3:
case 9 : sigval = 11; break; /* coprocessor segment overrun */ sigval = 5;
case 10 : sigval = 11; break; /* Invalid TSS */ break; /* breakpoint */
case 11 : sigval = 11; break; /* Segment not present */ case 4:
case 12 : sigval = 11; break; /* stack exception */ sigval = 16;
case 13 : sigval = 11; break; /* general protection */ break; /* into instruction (overflow) */
case 14 : sigval = 11; break; /* page fault */ case 5:
case 16 : sigval = 7; break; /* coprocessor error */ sigval = 16;
break; /* bound instruction */
case 6:
sigval = 4;
break; /* Invalid opcode */
case 7:
sigval = 8;
break; /* coprocessor not available */
case 8:
sigval = 7;
break; /* double fault */
case 9:
sigval = 11;
break; /* coprocessor segment overrun */
case 10:
sigval = 11;
break; /* Invalid TSS */
case 11:
sigval = 11;
break; /* Segment not present */
case 12:
sigval = 11;
break; /* stack exception */
case 13:
sigval = 11;
break; /* general protection */
case 14:
sigval = 11;
break; /* page fault */
case 16:
sigval = 7;
break; /* coprocessor error */
default: default:
sigval = 7; /* "software generated"*/ sigval = 7; /* "software generated" */
} }
return (sigval); return (sigval);
} }
@ -668,184 +712,194 @@ int exceptionVector;
/* WHILE WE FIND NICE HEX CHARS, BUILD AN INT */ /* WHILE WE FIND NICE HEX CHARS, BUILD AN INT */
/* RETURN NUMBER OF CHARS PROCESSED */ /* RETURN NUMBER OF CHARS PROCESSED */
/**********************************************/ /**********************************************/
int hexToInt(char **ptr, int *intValue) int
hexToInt (char **ptr, int *intValue)
{ {
int numChars = 0; int numChars = 0;
int hexValue; int hexValue;
*intValue = 0; *intValue = 0;
while (**ptr) while (**ptr)
{ {
hexValue = hex(**ptr); hexValue = hex (**ptr);
if (hexValue >=0) if (hexValue >= 0)
{ {
*intValue = (*intValue <<4) | hexValue; *intValue = (*intValue << 4) | hexValue;
numChars ++; numChars++;
} }
else else
break; break;
(*ptr)++; (*ptr)++;
} }
return (numChars); return (numChars);
} }
/* /*
* This function does all command procesing for interfacing to gdb. * This function does all command procesing for interfacing to gdb.
*/ */
void handle_exception(int exceptionVector) void
handle_exception (int exceptionVector)
{ {
int sigval, stepping; int sigval, stepping;
int addr, length; int addr, length;
char * ptr; char *ptr;
int newPC; int newPC;
gdb_i386vector = exceptionVector; gdb_i386vector = exceptionVector;
if (remote_debug) printf("vector=%d, sr=0x%x, pc=0x%x\n", if (remote_debug)
exceptionVector, {
registers[ PS ], printf ("vector=%d, sr=0x%x, pc=0x%x\n",
registers[ PC ]); exceptionVector, registers[PS], registers[PC]);
}
/* reply to host that an exception has occurred */ /* reply to host that an exception has occurred */
sigval = computeSignal( exceptionVector ); sigval = computeSignal (exceptionVector);
remcomOutBuffer[0] = 'S'; remcomOutBuffer[0] = 'S';
remcomOutBuffer[1] = hexchars[sigval >> 4]; remcomOutBuffer[1] = hexchars[sigval >> 4];
remcomOutBuffer[2] = hexchars[sigval % 16]; remcomOutBuffer[2] = hexchars[sigval % 16];
remcomOutBuffer[3] = 0; remcomOutBuffer[3] = 0;
putpacket(remcomOutBuffer); putpacket (remcomOutBuffer);
stepping = 0; stepping = 0;
while (1==1) { while (1 == 1)
remcomOutBuffer[0] = 0; {
ptr = getpacket(); remcomOutBuffer[0] = 0;
ptr = getpacket ();
switch (*ptr++) { switch (*ptr++)
case '?' : remcomOutBuffer[0] = 'S'; {
remcomOutBuffer[1] = hexchars[sigval >> 4]; case '?':
remcomOutBuffer[2] = hexchars[sigval % 16]; remcomOutBuffer[0] = 'S';
remcomOutBuffer[3] = 0; remcomOutBuffer[1] = hexchars[sigval >> 4];
break; remcomOutBuffer[2] = hexchars[sigval % 16];
case 'd' : remote_debug = !(remote_debug); /* toggle debug flag */ remcomOutBuffer[3] = 0;
break; break;
case 'g' : /* return the value of the CPU registers */ case 'd':
mem2hex((char*) registers, remcomOutBuffer, NUMREGBYTES, 0); remote_debug = !(remote_debug); /* toggle debug flag */
break; break;
case 'G' : /* set the value of the CPU registers - return OK */ case 'g': /* return the value of the CPU registers */
hex2mem(ptr, (char*) registers, NUMREGBYTES, 0); mem2hex ((char *) registers, remcomOutBuffer, NUMREGBYTES, 0);
strcpy(remcomOutBuffer,"OK"); break;
break; case 'G': /* set the value of the CPU registers - return OK */
case 'P' : /* set the value of a single CPU register - return OK */ hex2mem (ptr, (char *) registers, NUMREGBYTES, 0);
{ strcpy (remcomOutBuffer, "OK");
int regno; break;
case 'P': /* set the value of a single CPU register - return OK */
{
int regno;
if (hexToInt (&ptr, &regno) && *ptr++ == '=') if (hexToInt (&ptr, &regno) && *ptr++ == '=')
if (regno >= 0 && regno < NUMREGS) if (regno >= 0 && regno < NUMREGS)
{ {
hex2mem (ptr, (char *)&registers[regno], 4, 0); hex2mem (ptr, (char *) &registers[regno], 4, 0);
strcpy(remcomOutBuffer,"OK"); strcpy (remcomOutBuffer, "OK");
break; break;
} }
strcpy (remcomOutBuffer, "E01"); strcpy (remcomOutBuffer, "E01");
break; break;
} }
/* mAA..AA,LLLL Read LLLL bytes at address AA..AA */ /* mAA..AA,LLLL Read LLLL bytes at address AA..AA */
case 'm' : case 'm':
/* TRY TO READ %x,%x. IF SUCCEED, SET PTR = 0 */ /* TRY TO READ %x,%x. IF SUCCEED, SET PTR = 0 */
if (hexToInt(&ptr,&addr)) if (hexToInt (&ptr, &addr))
if (*(ptr++) == ',') if (*(ptr++) == ',')
if (hexToInt(&ptr,&length)) if (hexToInt (&ptr, &length))
{ {
ptr = 0; ptr = 0;
mem_err = 0; mem_err = 0;
mem2hex((char*) addr, remcomOutBuffer, length, 1); mem2hex ((char *) addr, remcomOutBuffer, length, 1);
if (mem_err) { if (mem_err)
strcpy (remcomOutBuffer, "E03"); {
debug_error ("memory fault"); strcpy (remcomOutBuffer, "E03");
} debug_error ("memory fault");
}
if (ptr)
{
strcpy(remcomOutBuffer,"E01");
} }
break; }
/* MAA..AA,LLLL: Write LLLL bytes at address AA.AA return OK */ if (ptr)
case 'M' : {
/* TRY TO READ '%x,%x:'. IF SUCCEED, SET PTR = 0 */ strcpy (remcomOutBuffer, "E01");
if (hexToInt(&ptr,&addr)) }
if (*(ptr++) == ',') break;
if (hexToInt(&ptr,&length))
if (*(ptr++) == ':')
{
mem_err = 0;
hex2mem(ptr, (char*) addr, length, 1);
if (mem_err) { /* MAA..AA,LLLL: Write LLLL bytes at address AA.AA return OK */
strcpy (remcomOutBuffer, "E03"); case 'M':
debug_error ("memory fault"); /* TRY TO READ '%x,%x:'. IF SUCCEED, SET PTR = 0 */
} else { if (hexToInt (&ptr, &addr))
strcpy(remcomOutBuffer,"OK"); if (*(ptr++) == ',')
} if (hexToInt (&ptr, &length))
if (*(ptr++) == ':')
{
mem_err = 0;
hex2mem (ptr, (char *) addr, length, 1);
ptr = 0; if (mem_err)
} {
if (ptr) strcpy (remcomOutBuffer, "E03");
{ debug_error ("memory fault");
strcpy(remcomOutBuffer,"E02"); }
} else
break; {
strcpy (remcomOutBuffer, "OK");
}
/* cAA..AA Continue at address AA..AA(optional) */ ptr = 0;
/* sAA..AA Step one instruction from AA..AA(optional) */ }
case 's' : if (ptr)
stepping = 1; {
case 'c' : strcpy (remcomOutBuffer, "E02");
/* try to read optional parameter, pc unchanged if no parm */ }
if (hexToInt(&ptr,&addr)) break;
registers[ PC ] = addr;
newPC = registers[ PC]; /* cAA..AA Continue at address AA..AA(optional) */
/* sAA..AA Step one instruction from AA..AA(optional) */
case 's':
stepping = 1;
case 'c':
/* try to read optional parameter, pc unchanged if no parm */
if (hexToInt (&ptr, &addr))
registers[PC] = addr;
/* clear the trace bit */ newPC = registers[PC];
registers[ PS ] &= 0xfffffeff;
/* set the trace bit if we're stepping */ /* clear the trace bit */
if (stepping) registers[ PS ] |= 0x100; registers[PS] &= 0xfffffeff;
_returnFromException(); /* this is a jump */ /* set the trace bit if we're stepping */
break; if (stepping)
registers[PS] |= 0x100;
/* kill the program */ _returnFromException (); /* this is a jump */
case 'k' : /* do nothing */ break;
/* kill the program */
case 'k': /* do nothing */
#if 0 #if 0
/* Huh? This doesn't look like "nothing". /* Huh? This doesn't look like "nothing".
m68k-stub.c and sparc-stub.c don't have it. */ m68k-stub.c and sparc-stub.c don't have it. */
BREAKPOINT(); BREAKPOINT ();
#endif #endif
break; break;
} /* switch */ } /* switch */
/* reply to the request */ /* reply to the request */
putpacket(remcomOutBuffer); putpacket (remcomOutBuffer);
} }
} }
/* this function is used to set up exception handlers for tracing and /* this function is used to set up exception handlers for tracing and
breakpoints */ breakpoints */
void set_debug_traps() void
set_debug_traps (void)
{ {
extern void remcomHandler(); stackPtr = &remcomStack[STACKSIZE / sizeof (int) - 1];
int exception;
stackPtr = &remcomStack[STACKSIZE/sizeof(int) - 1];
exceptionHandler (0, _catchException0); exceptionHandler (0, _catchException0);
exceptionHandler (1, _catchException1); exceptionHandler (1, _catchException1);
@ -871,8 +925,9 @@ int exception;
otherwise as a quick means to stop program execution and "break" into otherwise as a quick means to stop program execution and "break" into
the debugger. */ the debugger. */
void breakpoint() void
breakpoint (void)
{ {
if (initialized) if (initialized)
BREAKPOINT(); BREAKPOINT ();
} }

714
gdb/m68k-stub.c
View File

@ -477,48 +477,53 @@ asm(" movel d0,sp@-"); /* push exception onto stack */
asm(" jbsr _handle_exception"); /* this never returns */ asm(" jbsr _handle_exception"); /* this never returns */
asm(" rts"); /* return */ asm(" rts"); /* return */
void _returnFromException( Frame *frame ) void
_returnFromException (Frame * frame)
{ {
/* if no passed in frame, use the last one */ /* if no passed in frame, use the last one */
if (! frame) if (!frame)
{ {
frame = lastFrame; frame = lastFrame;
frame->frameSize = 4; frame->frameSize = 4;
frame->format = 0; frame->format = 0;
frame->fsaveHeader = -1; /* restore regs, but we dont have fsave info*/ frame->fsaveHeader = -1; /* restore regs, but we dont have fsave info */
} }
#if !defined (mc68020) && !defined (mc68332) #if !defined (mc68020) && !defined (mc68332)
/* a 68000 cannot use the internal info pushed onto a bus error /* a 68000 cannot use the internal info pushed onto a bus error
* or address error frame when doing an RTE so don't put this info * or address error frame when doing an RTE so don't put this info
* onto the stack or the stack will creep every time this happens. * onto the stack or the stack will creep every time this happens.
*/ */
frame->frameSize=3; frame->frameSize = 3;
#endif #endif
/* throw away any frames in the list after this frame */ /* throw away any frames in the list after this frame */
lastFrame = frame; lastFrame = frame;
frame->sr = registers[(int) PS]; frame->sr = registers[(int) PS];
frame->pc = registers[(int) PC]; frame->pc = registers[(int) PC];
if (registers[(int) PS] & 0x2000) if (registers[(int) PS] & 0x2000)
{ {
/* return to supervisor mode... */ /* return to supervisor mode... */
return_to_super(); return_to_super ();
} }
else else
{ /* return to user mode */ { /* return to user mode */
return_to_user(); return_to_user ();
} }
} }
int hex(ch) int
char ch; hex (ch)
char ch;
{ {
if ((ch >= 'a') && (ch <= 'f')) return (ch-'a'+10); if ((ch >= 'a') && (ch <= 'f'))
if ((ch >= '0') && (ch <= '9')) return (ch-'0'); return (ch - 'a' + 10);
if ((ch >= 'A') && (ch <= 'F')) return (ch-'A'+10); if ((ch >= '0') && (ch <= '9'))
return (ch - '0');
if ((ch >= 'A') && (ch <= 'F'))
return (ch - 'A' + 10);
return (-1); return (-1);
} }
@ -542,7 +547,7 @@ getpacket (void)
while ((ch = getDebugChar ()) != '$') while ((ch = getDebugChar ()) != '$')
; ;
retry: retry:
checksum = 0; checksum = 0;
xmitcsum = -1; xmitcsum = -1;
count = 0; count = 0;
@ -552,7 +557,7 @@ retry:
{ {
ch = getDebugChar (); ch = getDebugChar ();
if (ch == '$') if (ch == '$')
goto retry; goto retry;
if (ch == '#') if (ch == '#')
break; break;
checksum = checksum + ch; checksum = checksum + ch;
@ -573,7 +578,7 @@ retry:
if (remote_debug) if (remote_debug)
{ {
fprintf (stderr, fprintf (stderr,
"bad checksum. My count = 0x%x, sent=0x%x. buf=%s\n", "bad checksum. My count = 0x%x, sent=0x%x. buf=%s\n",
checksum, xmitcsum, buffer); checksum, xmitcsum, buffer);
} }
putDebugChar ('-'); /* failed checksum */ putDebugChar ('-'); /* failed checksum */
@ -599,125 +604,179 @@ retry:
/* send the packet in buffer. */ /* send the packet in buffer. */
void
void putpacket(buffer) putpacket (buffer)
char * buffer; char *buffer;
{ {
unsigned char checksum; unsigned char checksum;
int count; int count;
char ch; char ch;
/* $<packet info>#<checksum>. */ /* $<packet info>#<checksum>. */
do { do
putDebugChar('$'); {
checksum = 0; putDebugChar ('$');
count = 0; checksum = 0;
count = 0;
while (ch=buffer[count]) { while (ch = buffer[count])
putDebugChar(ch); {
checksum += ch; putDebugChar (ch);
count += 1; checksum += ch;
} count += 1;
}
putDebugChar('#'); putDebugChar ('#');
putDebugChar(hexchars[checksum >> 4]); putDebugChar (hexchars[checksum >> 4]);
putDebugChar(hexchars[checksum % 16]); putDebugChar (hexchars[checksum % 16]);
} while (getDebugChar() != '+'); }
while (getDebugChar () != '+');
} }
void debug_error(format, parm) void
char * format; debug_error (format, parm)
char * parm; char *format;
char *parm;
{ {
if (remote_debug) fprintf (stderr,format,parm); if (remote_debug)
fprintf (stderr, format, parm);
} }
/* convert the memory pointed to by mem into hex, placing result in buf */ /* convert the memory pointed to by mem into hex, placing result in buf */
/* return a pointer to the last char put in buf (null) */ /* return a pointer to the last char put in buf (null) */
char* mem2hex(mem, buf, count) char *
char* mem; mem2hex (mem, buf, count)
char* buf; char *mem;
int count; char *buf;
int count;
{ {
int i; int i;
unsigned char ch; unsigned char ch;
for (i=0;i<count;i++) { for (i = 0; i < count; i++)
ch = *mem++; {
*buf++ = hexchars[ch >> 4]; ch = *mem++;
*buf++ = hexchars[ch % 16]; *buf++ = hexchars[ch >> 4];
} *buf++ = hexchars[ch % 16];
*buf = 0; }
return(buf); *buf = 0;
return (buf);
} }
/* convert the hex array pointed to by buf into binary to be placed in mem */ /* convert the hex array pointed to by buf into binary to be placed in mem */
/* return a pointer to the character AFTER the last byte written */ /* return a pointer to the character AFTER the last byte written */
char* hex2mem(buf, mem, count) char *
char* buf; hex2mem (buf, mem, count)
char* mem; char *buf;
int count; char *mem;
int count;
{ {
int i; int i;
unsigned char ch; unsigned char ch;
for (i=0;i<count;i++) { for (i = 0; i < count; i++)
ch = hex(*buf++) << 4; {
ch = ch + hex(*buf++); ch = hex (*buf++) << 4;
*mem++ = ch; ch = ch + hex (*buf++);
} *mem++ = ch;
return(mem); }
return (mem);
} }
/* a bus error has occurred, perform a longjmp /* a bus error has occurred, perform a longjmp
to return execution and allow handling of the error */ to return execution and allow handling of the error */
void handle_buserror() void
handle_buserror ()
{ {
longjmp(remcomEnv,1); longjmp (remcomEnv, 1);
} }
/* this function takes the 68000 exception number and attempts to /* this function takes the 68000 exception number and attempts to
translate this number into a unix compatible signal value */ translate this number into a unix compatible signal value */
int computeSignal( exceptionVector ) int
int exceptionVector; computeSignal (exceptionVector)
int exceptionVector;
{ {
int sigval; int sigval;
switch (exceptionVector) { switch (exceptionVector)
case 2 : sigval = 10; break; /* bus error */ {
case 3 : sigval = 10; break; /* address error */ case 2:
case 4 : sigval = 4; break; /* illegal instruction */ sigval = 10;
case 5 : sigval = 8; break; /* zero divide */ break; /* bus error */
case 6 : sigval = 8; break; /* chk instruction */ case 3:
case 7 : sigval = 8; break; /* trapv instruction */ sigval = 10;
case 8 : sigval = 11; break; /* privilege violation */ break; /* address error */
case 9 : sigval = 5; break; /* trace trap */ case 4:
case 10: sigval = 4; break; /* line 1010 emulator */ sigval = 4;
case 11: sigval = 4; break; /* line 1111 emulator */ break; /* illegal instruction */
case 5:
sigval = 8;
break; /* zero divide */
case 6:
sigval = 8;
break; /* chk instruction */
case 7:
sigval = 8;
break; /* trapv instruction */
case 8:
sigval = 11;
break; /* privilege violation */
case 9:
sigval = 5;
break; /* trace trap */
case 10:
sigval = 4;
break; /* line 1010 emulator */
case 11:
sigval = 4;
break; /* line 1111 emulator */
/* Coprocessor protocol violation. Using a standard MMU or FPU /* Coprocessor protocol violation. Using a standard MMU or FPU
this cannot be triggered by software. Call it a SIGBUS. */ this cannot be triggered by software. Call it a SIGBUS. */
case 13: sigval = 10; break; case 13:
sigval = 10;
break;
case 31: sigval = 2; break; /* interrupt */ case 31:
case 33: sigval = 5; break; /* breakpoint */ sigval = 2;
break; /* interrupt */
case 33:
sigval = 5;
break; /* breakpoint */
/* This is a trap #8 instruction. Apparently it is someone's software /* This is a trap #8 instruction. Apparently it is someone's software
convention for some sort of SIGFPE condition. Whose? How many convention for some sort of SIGFPE condition. Whose? How many
people are being screwed by having this code the way it is? people are being screwed by having this code the way it is?
Is there a clean solution? */ Is there a clean solution? */
case 40: sigval = 8; break; /* floating point err */ case 40:
sigval = 8;
break; /* floating point err */
case 48: sigval = 8; break; /* floating point err */ case 48:
case 49: sigval = 8; break; /* floating point err */ sigval = 8;
case 50: sigval = 8; break; /* zero divide */ break; /* floating point err */
case 51: sigval = 8; break; /* underflow */ case 49:
case 52: sigval = 8; break; /* operand error */ sigval = 8;
case 53: sigval = 8; break; /* overflow */ break; /* floating point err */
case 54: sigval = 8; break; /* NAN */ case 50:
sigval = 8;
break; /* zero divide */
case 51:
sigval = 8;
break; /* underflow */
case 52:
sigval = 8;
break; /* operand error */
case 53:
sigval = 8;
break; /* overflow */
case 54:
sigval = 8;
break; /* NAN */
default: default:
sigval = 7; /* "software generated"*/ sigval = 7; /* "software generated" */
} }
return (sigval); return (sigval);
} }
@ -725,242 +784,255 @@ int exceptionVector;
/* WHILE WE FIND NICE HEX CHARS, BUILD AN INT */ /* WHILE WE FIND NICE HEX CHARS, BUILD AN INT */
/* RETURN NUMBER OF CHARS PROCESSED */ /* RETURN NUMBER OF CHARS PROCESSED */
/**********************************************/ /**********************************************/
int hexToInt(char **ptr, int *intValue) int
hexToInt (char **ptr, int *intValue)
{ {
int numChars = 0; int numChars = 0;
int hexValue; int hexValue;
*intValue = 0; *intValue = 0;
while (**ptr) while (**ptr)
{ {
hexValue = hex(**ptr); hexValue = hex (**ptr);
if (hexValue >=0) if (hexValue >= 0)
{ {
*intValue = (*intValue <<4) | hexValue; *intValue = (*intValue << 4) | hexValue;
numChars ++; numChars++;
} }
else else
break; break;
(*ptr)++; (*ptr)++;
} }
return (numChars); return (numChars);
} }
/* /*
* This function does all command procesing for interfacing to gdb. * This function does all command procesing for interfacing to gdb.
*/ */
void handle_exception(int exceptionVector) void
handle_exception (int exceptionVector)
{ {
int sigval, stepping; int sigval, stepping;
int addr, length; int addr, length;
char * ptr; char *ptr;
int newPC; int newPC;
Frame *frame; Frame *frame;
if (remote_debug) printf("vector=%d, sr=0x%x, pc=0x%x\n", if (remote_debug)
exceptionVector, printf ("vector=%d, sr=0x%x, pc=0x%x\n",
registers[ PS ], exceptionVector, registers[PS], registers[PC]);
registers[ PC ]);
/* reply to host that an exception has occurred */ /* reply to host that an exception has occurred */
sigval = computeSignal( exceptionVector ); sigval = computeSignal (exceptionVector);
remcomOutBuffer[0] = 'S'; remcomOutBuffer[0] = 'S';
remcomOutBuffer[1] = hexchars[sigval >> 4]; remcomOutBuffer[1] = hexchars[sigval >> 4];
remcomOutBuffer[2] = hexchars[sigval % 16]; remcomOutBuffer[2] = hexchars[sigval % 16];
remcomOutBuffer[3] = 0; remcomOutBuffer[3] = 0;
putpacket(remcomOutBuffer); putpacket (remcomOutBuffer);
stepping = 0; stepping = 0;
while (1==1) { while (1 == 1)
remcomOutBuffer[0] = 0; {
ptr = getpacket(); remcomOutBuffer[0] = 0;
switch (*ptr++) { ptr = getpacket ();
case '?' : remcomOutBuffer[0] = 'S'; switch (*ptr++)
remcomOutBuffer[1] = hexchars[sigval >> 4]; {
remcomOutBuffer[2] = hexchars[sigval % 16]; case '?':
remcomOutBuffer[3] = 0; remcomOutBuffer[0] = 'S';
break; remcomOutBuffer[1] = hexchars[sigval >> 4];
case 'd' : remote_debug = !(remote_debug); /* toggle debug flag */ remcomOutBuffer[2] = hexchars[sigval % 16];
break; remcomOutBuffer[3] = 0;
case 'g' : /* return the value of the CPU registers */ break;
mem2hex((char*) registers, remcomOutBuffer, NUMREGBYTES); case 'd':
break; remote_debug = !(remote_debug); /* toggle debug flag */
case 'G' : /* set the value of the CPU registers - return OK */ break;
hex2mem(ptr, (char*) registers, NUMREGBYTES); case 'g': /* return the value of the CPU registers */
strcpy(remcomOutBuffer,"OK"); mem2hex ((char *) registers, remcomOutBuffer, NUMREGBYTES);
break; break;
case 'G': /* set the value of the CPU registers - return OK */
hex2mem (ptr, (char *) registers, NUMREGBYTES);
strcpy (remcomOutBuffer, "OK");
break;
/* mAA..AA,LLLL Read LLLL bytes at address AA..AA */ /* mAA..AA,LLLL Read LLLL bytes at address AA..AA */
case 'm' : case 'm':
if (setjmp(remcomEnv) == 0) if (setjmp (remcomEnv) == 0)
{ {
exceptionHandler(2,handle_buserror); exceptionHandler (2, handle_buserror);
/* TRY TO READ %x,%x. IF SUCCEED, SET PTR = 0 */ /* TRY TO READ %x,%x. IF SUCCEED, SET PTR = 0 */
if (hexToInt(&ptr,&addr)) if (hexToInt (&ptr, &addr))
if (*(ptr++) == ',') if (*(ptr++) == ',')
if (hexToInt(&ptr,&length)) if (hexToInt (&ptr, &length))
{ {
ptr = 0; ptr = 0;
mem2hex((char*) addr, remcomOutBuffer, length); mem2hex ((char *) addr, remcomOutBuffer, length);
}
if (ptr)
{
strcpy(remcomOutBuffer,"E01");
}
} else {
exceptionHandler(2,_catchException);
strcpy(remcomOutBuffer,"E03");
debug_error("bus error");
}
/* restore handler for bus error */
exceptionHandler(2,_catchException);
break;
/* MAA..AA,LLLL: Write LLLL bytes at address AA.AA return OK */
case 'M' :
if (setjmp(remcomEnv) == 0) {
exceptionHandler(2,handle_buserror);
/* TRY TO READ '%x,%x:'. IF SUCCEED, SET PTR = 0 */
if (hexToInt(&ptr,&addr))
if (*(ptr++) == ',')
if (hexToInt(&ptr,&length))
if (*(ptr++) == ':')
{
hex2mem(ptr, (char*) addr, length);
ptr = 0;
strcpy(remcomOutBuffer,"OK");
}
if (ptr)
{
strcpy(remcomOutBuffer,"E02");
} }
} else {
exceptionHandler(2,_catchException); if (ptr)
strcpy(remcomOutBuffer,"E03"); {
debug_error("bus error"); strcpy (remcomOutBuffer, "E01");
} }
}
else
{
exceptionHandler (2, _catchException);
strcpy (remcomOutBuffer, "E03");
debug_error ("bus error");
}
/* restore handler for bus error */ /* restore handler for bus error */
exceptionHandler(2,_catchException); exceptionHandler (2, _catchException);
break; break;
/* cAA..AA Continue at address AA..AA(optional) */ /* MAA..AA,LLLL: Write LLLL bytes at address AA.AA return OK */
/* sAA..AA Step one instruction from AA..AA(optional) */ case 'M':
case 's' : if (setjmp (remcomEnv) == 0)
stepping = 1; {
case 'c' : exceptionHandler (2, handle_buserror);
/* try to read optional parameter, pc unchanged if no parm */
if (hexToInt(&ptr,&addr))
registers[ PC ] = addr;
newPC = registers[ PC]; /* TRY TO READ '%x,%x:'. IF SUCCEED, SET PTR = 0 */
if (hexToInt (&ptr, &addr))
if (*(ptr++) == ',')
if (hexToInt (&ptr, &length))
if (*(ptr++) == ':')
{
hex2mem (ptr, (char *) addr, length);
ptr = 0;
strcpy (remcomOutBuffer, "OK");
}
if (ptr)
{
strcpy (remcomOutBuffer, "E02");
}
}
else
{
exceptionHandler (2, _catchException);
strcpy (remcomOutBuffer, "E03");
debug_error ("bus error");
}
/* clear the trace bit */ /* restore handler for bus error */
registers[ PS ] &= 0x7fff; exceptionHandler (2, _catchException);
break;
/* set the trace bit if we're stepping */ /* cAA..AA Continue at address AA..AA(optional) */
if (stepping) registers[ PS ] |= 0x8000; /* sAA..AA Step one instruction from AA..AA(optional) */
case 's':
stepping = 1;
case 'c':
/* try to read optional parameter, pc unchanged if no parm */
if (hexToInt (&ptr, &addr))
registers[PC] = addr;
/* newPC = registers[PC];
* look for newPC in the linked list of exception frames.
* if it is found, use the old frame it. otherwise, /* clear the trace bit */
* fake up a dummy frame in returnFromException(). registers[PS] &= 0x7fff;
*/
if (remote_debug) printf("new pc = 0x%x\n",newPC); /* set the trace bit if we're stepping */
frame = lastFrame; if (stepping)
while (frame) registers[PS] |= 0x8000;
{
if (remote_debug) /*
printf("frame at 0x%x has pc=0x%x, except#=%d\n", * look for newPC in the linked list of exception frames.
frame,frame->exceptionPC, * if it is found, use the old frame it. otherwise,
frame->exceptionVector); * fake up a dummy frame in returnFromException().
if (frame->exceptionPC == newPC) break; /* bingo! a match */ */
/* if (remote_debug)
* for a breakpoint instruction, the saved pc may printf ("new pc = 0x%x\n", newPC);
* be off by two due to re-executing the instruction frame = lastFrame;
* replaced by the trap instruction. Check for this. while (frame)
*/ {
if ((frame->exceptionVector == 33) && if (remote_debug)
(frame->exceptionPC == (newPC+2))) break; printf ("frame at 0x%x has pc=0x%x, except#=%d\n",
if (frame == frame->previous) frame, frame->exceptionPC, frame->exceptionVector);
{ if (frame->exceptionPC == newPC)
frame = 0; /* no match found */ break; /* bingo! a match */
break; /*
} * for a breakpoint instruction, the saved pc may
* be off by two due to re-executing the instruction
* replaced by the trap instruction. Check for this.
*/
if ((frame->exceptionVector == 33) &&
(frame->exceptionPC == (newPC + 2)))
break;
if (frame == frame->previous)
{
frame = 0; /* no match found */
break;
}
frame = frame->previous; frame = frame->previous;
} }
/* /*
* If we found a match for the PC AND we are not returning * If we found a match for the PC AND we are not returning
* as a result of a breakpoint (33), * as a result of a breakpoint (33),
* trace exception (9), nmi (31), jmp to * trace exception (9), nmi (31), jmp to
* the old exception handler as if this code never ran. * the old exception handler as if this code never ran.
*/ */
if (frame) if (frame)
{ {
if ((frame->exceptionVector != 9) && if ((frame->exceptionVector != 9) &&
(frame->exceptionVector != 31) && (frame->exceptionVector != 31) &&
(frame->exceptionVector != 33)) (frame->exceptionVector != 33))
{ {
/* /*
* invoke the previous handler. * invoke the previous handler.
*/ */
if (oldExceptionHook) if (oldExceptionHook)
(*oldExceptionHook) (frame->exceptionVector); (*oldExceptionHook) (frame->exceptionVector);
newPC = registers[ PC ]; /* pc may have changed */ newPC = registers[PC]; /* pc may have changed */
if (newPC != frame->exceptionPC) if (newPC != frame->exceptionPC)
{ {
if (remote_debug) if (remote_debug)
printf("frame at 0x%x has pc=0x%x, except#=%d\n", printf ("frame at 0x%x has pc=0x%x, except#=%d\n",
frame,frame->exceptionPC, frame, frame->exceptionPC,
frame->exceptionVector); frame->exceptionVector);
/* re-use the last frame, we're skipping it (longjump?)*/ /* re-use the last frame, we're skipping it (longjump?) */
frame = (Frame *) 0; frame = (Frame *) 0;
_returnFromException( frame ); /* this is a jump */ _returnFromException (frame); /* this is a jump */
} }
} }
} }
/* if we couldn't find a frame, create one */ /* if we couldn't find a frame, create one */
if (frame == 0) if (frame == 0)
{ {
frame = lastFrame -1 ; frame = lastFrame - 1;
/* by using a bunch of print commands with breakpoints, /* by using a bunch of print commands with breakpoints,
it's possible for the frame stack to creep down. If it creeps it's possible for the frame stack to creep down. If it creeps
too far, give up and reset it to the top. Normal use should too far, give up and reset it to the top. Normal use should
not see this happen. not see this happen.
*/ */
if ((unsigned int) (frame-2) < (unsigned int) &gdbFrameStack) if ((unsigned int) (frame - 2) < (unsigned int) &gdbFrameStack)
{ {
initializeRemcomErrorFrame(); initializeRemcomErrorFrame ();
frame = lastFrame; frame = lastFrame;
} }
frame->previous = lastFrame; frame->previous = lastFrame;
lastFrame = frame; lastFrame = frame;
frame = 0; /* null so _return... will properly initialize it */ frame = 0; /* null so _return... will properly initialize it */
} }
_returnFromException( frame ); /* this is a jump */ _returnFromException (frame); /* this is a jump */
break; break;
/* kill the program */ /* kill the program */
case 'k' : /* do nothing */ case 'k': /* do nothing */
break; break;
} /* switch */ } /* switch */
/* reply to the request */ /* reply to the request */
putpacket(remcomOutBuffer); putpacket (remcomOutBuffer);
} }
} }
@ -968,45 +1040,46 @@ void handle_exception(int exceptionVector)
void void
initializeRemcomErrorFrame (void) initializeRemcomErrorFrame (void)
{ {
lastFrame = ((Frame *) &gdbFrameStack[FRAMESIZE-1]) - 1; lastFrame = ((Frame *) & gdbFrameStack[FRAMESIZE - 1]) - 1;
lastFrame->previous = lastFrame; lastFrame->previous = lastFrame;
} }
/* this function is used to set up exception handlers for tracing and /* this function is used to set up exception handlers for tracing and
breakpoints */ breakpoints */
void set_debug_traps() void
set_debug_traps ()
{ {
extern void _debug_level7(); extern void _debug_level7 ();
extern void remcomHandler(); extern void remcomHandler ();
int exception; int exception;
initializeRemcomErrorFrame(); initializeRemcomErrorFrame ();
stackPtr = &remcomStack[STACKSIZE/sizeof(int) - 1]; stackPtr = &remcomStack[STACKSIZE / sizeof (int) - 1];
for (exception = 2; exception <= 23; exception++) for (exception = 2; exception <= 23; exception++)
exceptionHandler(exception,_catchException); exceptionHandler (exception, _catchException);
/* level 7 interrupt */ /* level 7 interrupt */
exceptionHandler(31,_debug_level7); exceptionHandler (31, _debug_level7);
/* breakpoint exception (trap #1) */ /* breakpoint exception (trap #1) */
exceptionHandler(33,_catchException); exceptionHandler (33, _catchException);
/* This is a trap #8 instruction. Apparently it is someone's software /* This is a trap #8 instruction. Apparently it is someone's software
convention for some sort of SIGFPE condition. Whose? How many convention for some sort of SIGFPE condition. Whose? How many
people are being screwed by having this code the way it is? people are being screwed by having this code the way it is?
Is there a clean solution? */ Is there a clean solution? */
exceptionHandler(40,_catchException); exceptionHandler (40, _catchException);
/* 48 to 54 are floating point coprocessor errors */ /* 48 to 54 are floating point coprocessor errors */
for (exception = 48; exception <= 54; exception++) for (exception = 48; exception <= 54; exception++)
exceptionHandler(exception,_catchException); exceptionHandler (exception, _catchException);
if (oldExceptionHook != remcomHandler) if (oldExceptionHook != remcomHandler)
{ {
oldExceptionHook = exceptionHook; oldExceptionHook = exceptionHook;
exceptionHook = remcomHandler; exceptionHook = remcomHandler;
} }
initialized = 1; initialized = 1;
@ -1017,8 +1090,9 @@ void set_debug_traps()
otherwise as a quick means to stop program execution and "break" into otherwise as a quick means to stop program execution and "break" into
the debugger. */ the debugger. */
void breakpoint() void
breakpoint ()
{ {
if (initialized) BREAKPOINT(); if (initialized)
BREAKPOINT ();
} }