| // OBSOLETE /**************************************************************************** |
| // OBSOLETE |
| // OBSOLETE THIS SOFTWARE IS NOT COPYRIGHTED |
| // OBSOLETE |
| // OBSOLETE HP offers the following for use in the public domain. HP makes no |
| // OBSOLETE warranty with regard to the software or it's performance and the |
| // OBSOLETE user accepts the software "AS IS" with all faults. |
| // OBSOLETE |
| // OBSOLETE HP DISCLAIMS ANY WARRANTIES, EXPRESS OR IMPLIED, WITH REGARD |
| // OBSOLETE TO THIS SOFTWARE INCLUDING BUT NOT LIMITED TO THE WARRANTIES |
| // OBSOLETE OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| // OBSOLETE |
| // OBSOLETE ****************************************************************************/ |
| // OBSOLETE |
| // OBSOLETE /**************************************************************************** |
| // OBSOLETE * Header: remcom.c,v 1.34 91/03/09 12:29:49 glenne Exp $ |
| // OBSOLETE * |
| // OBSOLETE * Module name: remcom.c $ |
| // OBSOLETE * Revision: 1.34 $ |
| // OBSOLETE * Date: 91/03/09 12:29:49 $ |
| // OBSOLETE * Contributor: Lake Stevens Instrument Division$ |
| // OBSOLETE * |
| // OBSOLETE * Description: low level support for gdb debugger. $ |
| // OBSOLETE * |
| // OBSOLETE * Considerations: only works on target hardware $ |
| // OBSOLETE * |
| // OBSOLETE * Written by: Glenn Engel $ |
| // OBSOLETE * ModuleState: Experimental $ |
| // OBSOLETE * |
| // OBSOLETE * NOTES: See Below $ |
| // OBSOLETE * |
| // OBSOLETE * Modified for M32R by Michael Snyder, Cygnus Support. |
| // OBSOLETE * |
| // OBSOLETE * To enable debugger support, two things need to happen. One, a |
| // OBSOLETE * call to set_debug_traps() is necessary in order to allow any breakpoints |
| // OBSOLETE * or error conditions to be properly intercepted and reported to gdb. |
| // OBSOLETE * Two, a breakpoint needs to be generated to begin communication. This |
| // OBSOLETE * is most easily accomplished by a call to breakpoint(). Breakpoint() |
| // OBSOLETE * simulates a breakpoint by executing a trap #1. |
| // OBSOLETE * |
| // OBSOLETE * The external function exceptionHandler() is |
| // OBSOLETE * used to attach a specific handler to a specific M32R vector number. |
| // OBSOLETE * It should use the same privilege level it runs at. It should |
| // OBSOLETE * install it as an interrupt gate so that interrupts are masked |
| // OBSOLETE * while the handler runs. |
| // OBSOLETE * |
| // OBSOLETE * Because gdb will sometimes write to the stack area to execute function |
| // OBSOLETE * calls, this program cannot rely on using the supervisor stack so it |
| // OBSOLETE * uses it's own stack area reserved in the int array remcomStack. |
| // OBSOLETE * |
| // OBSOLETE ************* |
| // OBSOLETE * |
| // OBSOLETE * The following gdb commands are supported: |
| // OBSOLETE * |
| // OBSOLETE * command function Return value |
| // OBSOLETE * |
| // OBSOLETE * g return the value of the CPU registers hex data or ENN |
| // OBSOLETE * G set the value of the CPU registers OK or ENN |
| // OBSOLETE * |
| // OBSOLETE * mAA..AA,LLLL Read LLLL bytes at address AA..AA hex data or ENN |
| // OBSOLETE * MAA..AA,LLLL: Write LLLL bytes at address AA.AA OK or ENN |
| // OBSOLETE * XAA..AA,LLLL: Write LLLL binary bytes at address OK or ENN |
| // OBSOLETE * AA..AA |
| // OBSOLETE * |
| // OBSOLETE * c Resume at current address SNN ( signal NN) |
| // OBSOLETE * cAA..AA Continue at address AA..AA SNN |
| // OBSOLETE * |
| // OBSOLETE * s Step one instruction SNN |
| // OBSOLETE * sAA..AA Step one instruction from AA..AA SNN |
| // OBSOLETE * |
| // OBSOLETE * k kill |
| // OBSOLETE * |
| // OBSOLETE * ? What was the last sigval ? SNN (signal NN) |
| // OBSOLETE * |
| // OBSOLETE * All commands and responses are sent with a packet which includes a |
| // OBSOLETE * checksum. A packet consists of |
| // OBSOLETE * |
| // OBSOLETE * $<packet info>#<checksum>. |
| // OBSOLETE * |
| // OBSOLETE * where |
| // OBSOLETE * <packet info> :: <characters representing the command or response> |
| // OBSOLETE * <checksum> :: <two hex digits computed as modulo 256 sum of <packetinfo>> |
| // OBSOLETE * |
| // OBSOLETE * When a packet is received, it is first acknowledged with either '+' or '-'. |
| // OBSOLETE * '+' indicates a successful transfer. '-' indicates a failed transfer. |
| // OBSOLETE * |
| // OBSOLETE * Example: |
| // OBSOLETE * |
| // OBSOLETE * Host: Reply: |
| // OBSOLETE * $m0,10#2a +$00010203040506070809101112131415#42 |
| // OBSOLETE * |
| // OBSOLETE ****************************************************************************/ |
| // OBSOLETE |
| // OBSOLETE |
| // OBSOLETE /************************************************************************ |
| // OBSOLETE * |
| // OBSOLETE * external low-level support routines |
| // OBSOLETE */ |
| // OBSOLETE extern void putDebugChar(); /* write a single character */ |
| // OBSOLETE extern int getDebugChar(); /* read and return a single char */ |
| // OBSOLETE extern void exceptionHandler(); /* assign an exception handler */ |
| // OBSOLETE |
| // OBSOLETE /***************************************************************************** |
| // OBSOLETE * BUFMAX defines the maximum number of characters in inbound/outbound buffers |
| // OBSOLETE * at least NUMREGBYTES*2 are needed for register packets |
| // OBSOLETE */ |
| // OBSOLETE #define BUFMAX 400 |
| // OBSOLETE |
| // OBSOLETE static char initialized; /* boolean flag. != 0 means we've been initialized */ |
| // OBSOLETE |
| // OBSOLETE int remote_debug; |
| // OBSOLETE /* debug > 0 prints ill-formed commands in valid packets & checksum errors */ |
| // OBSOLETE |
| // OBSOLETE static const unsigned char hexchars[]="0123456789abcdef"; |
| // OBSOLETE |
| // OBSOLETE #define NUMREGS 24 |
| // OBSOLETE |
| // OBSOLETE /* Number of bytes of registers. */ |
| // OBSOLETE #define NUMREGBYTES (NUMREGS * 4) |
| // OBSOLETE enum regnames { R0, R1, R2, R3, R4, R5, R6, R7, |
| // OBSOLETE R8, R9, R10, R11, R12, R13, R14, R15, |
| // OBSOLETE PSW, CBR, SPI, SPU, BPC, PC, ACCL, ACCH }; |
| // OBSOLETE |
| // OBSOLETE enum SYS_calls { |
| // OBSOLETE SYS_null, |
| // OBSOLETE SYS_exit, |
| // OBSOLETE SYS_open, |
| // OBSOLETE SYS_close, |
| // OBSOLETE SYS_read, |
| // OBSOLETE SYS_write, |
| // OBSOLETE SYS_lseek, |
| // OBSOLETE SYS_unlink, |
| // OBSOLETE SYS_getpid, |
| // OBSOLETE SYS_kill, |
| // OBSOLETE SYS_fstat, |
| // OBSOLETE SYS_sbrk, |
| // OBSOLETE SYS_fork, |
| // OBSOLETE SYS_execve, |
| // OBSOLETE SYS_wait4, |
| // OBSOLETE SYS_link, |
| // OBSOLETE SYS_chdir, |
| // OBSOLETE SYS_stat, |
| // OBSOLETE SYS_utime, |
| // OBSOLETE SYS_chown, |
| // OBSOLETE SYS_chmod, |
| // OBSOLETE SYS_time, |
| // OBSOLETE SYS_pipe }; |
| // OBSOLETE |
| // OBSOLETE static int registers[NUMREGS]; |
| // OBSOLETE |
| // OBSOLETE #define STACKSIZE 8096 |
| // OBSOLETE static unsigned char remcomInBuffer[BUFMAX]; |
| // OBSOLETE static unsigned char remcomOutBuffer[BUFMAX]; |
| // OBSOLETE static int remcomStack[STACKSIZE/sizeof(int)]; |
| // OBSOLETE static int* stackPtr = &remcomStack[STACKSIZE/sizeof(int) - 1]; |
| // OBSOLETE |
| // OBSOLETE static unsigned int save_vectors[18]; /* previous exception vectors */ |
| // OBSOLETE |
| // OBSOLETE /* Indicate to caller of mem2hex or hex2mem that there has been an error. */ |
| // OBSOLETE static volatile int mem_err = 0; |
| // OBSOLETE |
| // OBSOLETE /* Store the vector number here (since GDB only gets the signal |
| // OBSOLETE number through the usual means, and that's not very specific). */ |
| // OBSOLETE int gdb_m32r_vector = -1; |
| // OBSOLETE |
| // OBSOLETE #if 0 |
| // OBSOLETE #include "syscall.h" /* for SYS_exit, SYS_write etc. */ |
| // OBSOLETE #endif |
| // OBSOLETE |
| // OBSOLETE /* Global entry points: |
| // OBSOLETE */ |
| // OBSOLETE |
| // OBSOLETE extern void handle_exception(int); |
| // OBSOLETE extern void set_debug_traps(void); |
| // OBSOLETE extern void breakpoint(void); |
| // OBSOLETE |
| // OBSOLETE /* Local functions: |
| // OBSOLETE */ |
| // OBSOLETE |
| // OBSOLETE static int computeSignal(int); |
| // OBSOLETE static void putpacket(unsigned char *); |
| // OBSOLETE static unsigned char *getpacket(void); |
| // OBSOLETE |
| // OBSOLETE static unsigned char *mem2hex(unsigned char *, unsigned char *, int, int); |
| // OBSOLETE static unsigned char *hex2mem(unsigned char *, unsigned char *, int, int); |
| // OBSOLETE static int hexToInt(unsigned char **, int *); |
| // OBSOLETE static unsigned char *bin2mem(unsigned char *, unsigned char *, int, int); |
| // OBSOLETE static void stash_registers(void); |
| // OBSOLETE static void restore_registers(void); |
| // OBSOLETE static int prepare_to_step(int); |
| // OBSOLETE static int finish_from_step(void); |
| // OBSOLETE static unsigned long crc32 (unsigned char *, int, unsigned long); |
| // OBSOLETE |
| // OBSOLETE static void gdb_error(char *, char *); |
| // OBSOLETE static int gdb_putchar(int), gdb_puts(char *), gdb_write(char *, int); |
| // OBSOLETE |
| // OBSOLETE static unsigned char *strcpy (unsigned char *, const unsigned char *); |
| // OBSOLETE static int strlen (const unsigned char *); |
| // OBSOLETE |
| // OBSOLETE /* |
| // OBSOLETE * This function does all command procesing for interfacing to gdb. |
| // OBSOLETE */ |
| // OBSOLETE |
| // OBSOLETE void |
| // OBSOLETE handle_exception(int exceptionVector) |
| // OBSOLETE { |
| // OBSOLETE int sigval, stepping; |
| // OBSOLETE int addr, length, i; |
| // OBSOLETE unsigned char * ptr; |
| // OBSOLETE unsigned char buf[16]; |
| // OBSOLETE int binary; |
| // OBSOLETE |
| // OBSOLETE /* Do not call finish_from_step() if this is not a trap #1 |
| // OBSOLETE * (breakpoint trap). Without this check, the finish_from_step() |
| // OBSOLETE * might interpret a system call trap as a single step trap. This |
| // OBSOLETE * can happen if: the stub receives 's' and exits, but an interrupt |
| // OBSOLETE * was pending; the interrupt is now handled and causes the stub to |
| // OBSOLETE * be reentered because some function makes a system call. |
| // OBSOLETE */ |
| // OBSOLETE if (exceptionVector == 1) /* Trap exception? */ |
| // OBSOLETE if (!finish_from_step()) /* Go see if stepping state needs update. */ |
| // OBSOLETE return; /* "false step": let the target continue */ |
| // OBSOLETE |
| // OBSOLETE gdb_m32r_vector = exceptionVector; |
| // OBSOLETE |
| // OBSOLETE if (remote_debug) |
| // OBSOLETE { |
| // OBSOLETE mem2hex((unsigned char *) &exceptionVector, buf, 4, 0); |
| // OBSOLETE gdb_error("Handle exception %s, ", buf); |
| // OBSOLETE mem2hex((unsigned char *) ®isters[PC], buf, 4, 0); |
| // OBSOLETE gdb_error("PC == 0x%s\n", buf); |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* reply to host that an exception has occurred */ |
| // OBSOLETE sigval = computeSignal( exceptionVector ); |
| // OBSOLETE |
| // OBSOLETE ptr = remcomOutBuffer; |
| // OBSOLETE |
| // OBSOLETE *ptr++ = 'T'; /* notify gdb with signo, PC, FP and SP */ |
| // OBSOLETE *ptr++ = hexchars[sigval >> 4]; |
| // OBSOLETE *ptr++ = hexchars[sigval & 0xf]; |
| // OBSOLETE |
| // OBSOLETE *ptr++ = hexchars[PC >> 4]; |
| // OBSOLETE *ptr++ = hexchars[PC & 0xf]; |
| // OBSOLETE *ptr++ = ':'; |
| // OBSOLETE ptr = mem2hex((unsigned char *)®isters[PC], ptr, 4, 0); /* PC */ |
| // OBSOLETE *ptr++ = ';'; |
| // OBSOLETE |
| // OBSOLETE *ptr++ = hexchars[R13 >> 4]; |
| // OBSOLETE *ptr++ = hexchars[R13 & 0xf]; |
| // OBSOLETE *ptr++ = ':'; |
| // OBSOLETE ptr = mem2hex((unsigned char *)®isters[R13], ptr, 4, 0); /* FP */ |
| // OBSOLETE *ptr++ = ';'; |
| // OBSOLETE |
| // OBSOLETE *ptr++ = hexchars[R15 >> 4]; |
| // OBSOLETE *ptr++ = hexchars[R15 & 0xf]; |
| // OBSOLETE *ptr++ = ':'; |
| // OBSOLETE ptr = mem2hex((unsigned char *)®isters[R15], ptr, 4, 0); /* SP */ |
| // OBSOLETE *ptr++ = ';'; |
| // OBSOLETE *ptr++ = 0; |
| // OBSOLETE |
| // OBSOLETE if (exceptionVector == 0) /* simulated SYS call stuff */ |
| // OBSOLETE { |
| // OBSOLETE mem2hex((unsigned char *) ®isters[PC], buf, 4, 0); |
| // OBSOLETE switch (registers[R0]) { |
| // OBSOLETE case SYS_exit: |
| // OBSOLETE gdb_error("Target program has exited at %s\n", buf); |
| // OBSOLETE ptr = remcomOutBuffer; |
| // OBSOLETE *ptr++ = 'W'; |
| // OBSOLETE sigval = registers[R1] & 0xff; |
| // OBSOLETE *ptr++ = hexchars[sigval >> 4]; |
| // OBSOLETE *ptr++ = hexchars[sigval & 0xf]; |
| // OBSOLETE *ptr++ = 0; |
| // OBSOLETE break; |
| // OBSOLETE case SYS_open: |
| // OBSOLETE gdb_error("Target attempts SYS_open call at %s\n", buf); |
| // OBSOLETE break; |
| // OBSOLETE case SYS_close: |
| // OBSOLETE gdb_error("Target attempts SYS_close call at %s\n", buf); |
| // OBSOLETE break; |
| // OBSOLETE case SYS_read: |
| // OBSOLETE gdb_error("Target attempts SYS_read call at %s\n", buf); |
| // OBSOLETE break; |
| // OBSOLETE case SYS_write: |
| // OBSOLETE if (registers[R1] == 1 || /* write to stdout */ |
| // OBSOLETE registers[R1] == 2) /* write to stderr */ |
| // OBSOLETE { /* (we can do that) */ |
| // OBSOLETE registers[R0] = gdb_write((void *) registers[R2], registers[R3]); |
| // OBSOLETE return; |
| // OBSOLETE } |
| // OBSOLETE else |
| // OBSOLETE gdb_error("Target attempts SYS_write call at %s\n", buf); |
| // OBSOLETE break; |
| // OBSOLETE case SYS_lseek: |
| // OBSOLETE gdb_error("Target attempts SYS_lseek call at %s\n", buf); |
| // OBSOLETE break; |
| // OBSOLETE case SYS_unlink: |
| // OBSOLETE gdb_error("Target attempts SYS_unlink call at %s\n", buf); |
| // OBSOLETE break; |
| // OBSOLETE case SYS_getpid: |
| // OBSOLETE gdb_error("Target attempts SYS_getpid call at %s\n", buf); |
| // OBSOLETE break; |
| // OBSOLETE case SYS_kill: |
| // OBSOLETE gdb_error("Target attempts SYS_kill call at %s\n", buf); |
| // OBSOLETE break; |
| // OBSOLETE case SYS_fstat: |
| // OBSOLETE gdb_error("Target attempts SYS_fstat call at %s\n", buf); |
| // OBSOLETE break; |
| // OBSOLETE default: |
| // OBSOLETE gdb_error("Target attempts unknown SYS call at %s\n", buf); |
| // OBSOLETE break; |
| // OBSOLETE } |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE putpacket(remcomOutBuffer); |
| // OBSOLETE |
| // OBSOLETE stepping = 0; |
| // OBSOLETE |
| // OBSOLETE while (1==1) { |
| // OBSOLETE remcomOutBuffer[0] = 0; |
| // OBSOLETE ptr = getpacket(); |
| // OBSOLETE binary = 0; |
| // OBSOLETE switch (*ptr++) { |
| // OBSOLETE default: /* Unknown code. Return an empty reply message. */ |
| // OBSOLETE break; |
| // OBSOLETE case 'R': |
| // OBSOLETE if (hexToInt (&ptr, &addr)) |
| // OBSOLETE registers[PC] = addr; |
| // OBSOLETE strcpy(remcomOutBuffer, "OK"); |
| // OBSOLETE break; |
| // OBSOLETE case '!': |
| // OBSOLETE strcpy(remcomOutBuffer, "OK"); |
| // OBSOLETE break; |
| // OBSOLETE case 'X': /* XAA..AA,LLLL:<binary data>#cs */ |
| // OBSOLETE binary = 1; |
| // OBSOLETE case 'M': /* MAA..AA,LLLL: Write LLLL bytes at address AA.AA return OK */ |
| // OBSOLETE /* TRY TO READ '%x,%x:'. IF SUCCEED, SET PTR = 0 */ |
| // OBSOLETE { |
| // OBSOLETE if (hexToInt(&ptr,&addr)) |
| // OBSOLETE if (*(ptr++) == ',') |
| // OBSOLETE if (hexToInt(&ptr,&length)) |
| // OBSOLETE if (*(ptr++) == ':') |
| // OBSOLETE { |
| // OBSOLETE mem_err = 0; |
| // OBSOLETE if (binary) |
| // OBSOLETE bin2mem (ptr, (unsigned char *) addr, length, 1); |
| // OBSOLETE else |
| // OBSOLETE hex2mem(ptr, (unsigned char*) addr, length, 1); |
| // OBSOLETE if (mem_err) { |
| // OBSOLETE strcpy (remcomOutBuffer, "E03"); |
| // OBSOLETE gdb_error ("memory fault", ""); |
| // OBSOLETE } else { |
| // OBSOLETE strcpy(remcomOutBuffer,"OK"); |
| // OBSOLETE } |
| // OBSOLETE ptr = 0; |
| // OBSOLETE } |
| // OBSOLETE if (ptr) |
| // OBSOLETE { |
| // OBSOLETE strcpy(remcomOutBuffer,"E02"); |
| // OBSOLETE } |
| // OBSOLETE } |
| // OBSOLETE break; |
| // OBSOLETE case 'm': /* mAA..AA,LLLL Read LLLL bytes at address AA..AA */ |
| // OBSOLETE /* TRY TO READ %x,%x. IF SUCCEED, SET PTR = 0 */ |
| // OBSOLETE if (hexToInt(&ptr,&addr)) |
| // OBSOLETE if (*(ptr++) == ',') |
| // OBSOLETE if (hexToInt(&ptr,&length)) |
| // OBSOLETE { |
| // OBSOLETE ptr = 0; |
| // OBSOLETE mem_err = 0; |
| // OBSOLETE mem2hex((unsigned char*) addr, remcomOutBuffer, length, 1); |
| // OBSOLETE if (mem_err) { |
| // OBSOLETE strcpy (remcomOutBuffer, "E03"); |
| // OBSOLETE gdb_error ("memory fault", ""); |
| // OBSOLETE } |
| // OBSOLETE } |
| // OBSOLETE if (ptr) |
| // OBSOLETE { |
| // OBSOLETE strcpy(remcomOutBuffer,"E01"); |
| // OBSOLETE } |
| // OBSOLETE break; |
| // OBSOLETE case '?': |
| // OBSOLETE remcomOutBuffer[0] = 'S'; |
| // OBSOLETE remcomOutBuffer[1] = hexchars[sigval >> 4]; |
| // OBSOLETE remcomOutBuffer[2] = hexchars[sigval % 16]; |
| // OBSOLETE remcomOutBuffer[3] = 0; |
| // OBSOLETE break; |
| // OBSOLETE case 'd': |
| // OBSOLETE remote_debug = !(remote_debug); /* toggle debug flag */ |
| // OBSOLETE break; |
| // OBSOLETE case 'g': /* return the value of the CPU registers */ |
| // OBSOLETE mem2hex((unsigned char*) registers, remcomOutBuffer, NUMREGBYTES, 0); |
| // OBSOLETE break; |
| // OBSOLETE case 'P': /* set the value of a single CPU register - return OK */ |
| // OBSOLETE { |
| // OBSOLETE int regno; |
| // OBSOLETE |
| // OBSOLETE if (hexToInt (&ptr, ®no) && *ptr++ == '=') |
| // OBSOLETE if (regno >= 0 && regno < NUMREGS) |
| // OBSOLETE { |
| // OBSOLETE int stackmode; |
| // OBSOLETE |
| // OBSOLETE hex2mem (ptr, (unsigned char *) ®isters[regno], 4, 0); |
| // OBSOLETE /* |
| // OBSOLETE * Since we just changed a single CPU register, let's |
| // OBSOLETE * make sure to keep the several stack pointers consistant. |
| // OBSOLETE */ |
| // OBSOLETE stackmode = registers[PSW] & 0x80; |
| // OBSOLETE if (regno == R15) /* stack pointer changed */ |
| // OBSOLETE { /* need to change SPI or SPU */ |
| // OBSOLETE if (stackmode == 0) |
| // OBSOLETE registers[SPI] = registers[R15]; |
| // OBSOLETE else |
| // OBSOLETE registers[SPU] = registers[R15]; |
| // OBSOLETE } |
| // OBSOLETE else if (regno == SPU) /* "user" stack pointer changed */ |
| // OBSOLETE { |
| // OBSOLETE if (stackmode != 0) /* stack in user mode: copy SP */ |
| // OBSOLETE registers[R15] = registers[SPU]; |
| // OBSOLETE } |
| // OBSOLETE else if (regno == SPI) /* "interrupt" stack pointer changed */ |
| // OBSOLETE { |
| // OBSOLETE if (stackmode == 0) /* stack in interrupt mode: copy SP */ |
| // OBSOLETE registers[R15] = registers[SPI]; |
| // OBSOLETE } |
| // OBSOLETE else if (regno == PSW) /* stack mode may have changed! */ |
| // OBSOLETE { /* force SP to either SPU or SPI */ |
| // OBSOLETE if (stackmode == 0) /* stack in user mode */ |
| // OBSOLETE registers[R15] = registers[SPI]; |
| // OBSOLETE else /* stack in interrupt mode */ |
| // OBSOLETE registers[R15] = registers[SPU]; |
| // OBSOLETE } |
| // OBSOLETE strcpy (remcomOutBuffer, "OK"); |
| // OBSOLETE break; |
| // OBSOLETE } |
| // OBSOLETE strcpy (remcomOutBuffer, "E01"); |
| // OBSOLETE break; |
| // OBSOLETE } |
| // OBSOLETE case 'G': /* set the value of the CPU registers - return OK */ |
| // OBSOLETE hex2mem(ptr, (unsigned char*) registers, NUMREGBYTES, 0); |
| // OBSOLETE strcpy(remcomOutBuffer,"OK"); |
| // OBSOLETE break; |
| // OBSOLETE case 's': /* sAA..AA Step one instruction from AA..AA(optional) */ |
| // OBSOLETE stepping = 1; |
| // OBSOLETE case 'c': /* cAA..AA Continue from address AA..AA(optional) */ |
| // OBSOLETE /* try to read optional parameter, pc unchanged if no parm */ |
| // OBSOLETE if (hexToInt(&ptr,&addr)) |
| // OBSOLETE registers[ PC ] = addr; |
| // OBSOLETE |
| // OBSOLETE if (stepping) /* single-stepping */ |
| // OBSOLETE { |
| // OBSOLETE if (!prepare_to_step(0)) /* set up for single-step */ |
| // OBSOLETE { |
| // OBSOLETE /* prepare_to_step has already emulated the target insn: |
| // OBSOLETE Send SIGTRAP to gdb, don't resume the target at all. */ |
| // OBSOLETE ptr = remcomOutBuffer; |
| // OBSOLETE *ptr++ = 'T'; /* Simulate stopping with SIGTRAP */ |
| // OBSOLETE *ptr++ = '0'; |
| // OBSOLETE *ptr++ = '5'; |
| // OBSOLETE |
| // OBSOLETE *ptr++ = hexchars[PC >> 4]; /* send PC */ |
| // OBSOLETE *ptr++ = hexchars[PC & 0xf]; |
| // OBSOLETE *ptr++ = ':'; |
| // OBSOLETE ptr = mem2hex((unsigned char *)®isters[PC], ptr, 4, 0); |
| // OBSOLETE *ptr++ = ';'; |
| // OBSOLETE |
| // OBSOLETE *ptr++ = hexchars[R13 >> 4]; /* send FP */ |
| // OBSOLETE *ptr++ = hexchars[R13 & 0xf]; |
| // OBSOLETE *ptr++ = ':'; |
| // OBSOLETE ptr = mem2hex((unsigned char *)®isters[R13], ptr, 4, 0); |
| // OBSOLETE *ptr++ = ';'; |
| // OBSOLETE |
| // OBSOLETE *ptr++ = hexchars[R15 >> 4]; /* send SP */ |
| // OBSOLETE *ptr++ = hexchars[R15 & 0xf]; |
| // OBSOLETE *ptr++ = ':'; |
| // OBSOLETE ptr = mem2hex((unsigned char *)®isters[R15], ptr, 4, 0); |
| // OBSOLETE *ptr++ = ';'; |
| // OBSOLETE *ptr++ = 0; |
| // OBSOLETE |
| // OBSOLETE break; |
| // OBSOLETE } |
| // OBSOLETE } |
| // OBSOLETE else /* continuing, not single-stepping */ |
| // OBSOLETE { |
| // OBSOLETE /* OK, about to do a "continue". First check to see if the |
| // OBSOLETE target pc is on an odd boundary (second instruction in the |
| // OBSOLETE word). If so, we must do a single-step first, because |
| // OBSOLETE ya can't jump or return back to an odd boundary! */ |
| // OBSOLETE if ((registers[PC] & 2) != 0) |
| // OBSOLETE prepare_to_step(1); |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE return; |
| // OBSOLETE |
| // OBSOLETE case 'D': /* Detach */ |
| // OBSOLETE #if 0 |
| // OBSOLETE /* I am interpreting this to mean, release the board from control |
| // OBSOLETE by the remote stub. To do this, I am restoring the original |
| // OBSOLETE (or at least previous) exception vectors. |
| // OBSOLETE */ |
| // OBSOLETE for (i = 0; i < 18; i++) |
| // OBSOLETE exceptionHandler (i, save_vectors[i]); |
| // OBSOLETE putpacket ("OK"); |
| // OBSOLETE return; /* continue the inferior */ |
| // OBSOLETE #else |
| // OBSOLETE strcpy(remcomOutBuffer,"OK"); |
| // OBSOLETE break; |
| // OBSOLETE #endif |
| // OBSOLETE case 'q': |
| // OBSOLETE if (*ptr++ == 'C' && |
| // OBSOLETE *ptr++ == 'R' && |
| // OBSOLETE *ptr++ == 'C' && |
| // OBSOLETE *ptr++ == ':') |
| // OBSOLETE { |
| // OBSOLETE unsigned long start, len, our_crc; |
| // OBSOLETE |
| // OBSOLETE if (hexToInt (&ptr, (int *) &start) && |
| // OBSOLETE *ptr++ == ',' && |
| // OBSOLETE hexToInt (&ptr, (int *) &len)) |
| // OBSOLETE { |
| // OBSOLETE remcomOutBuffer[0] = 'C'; |
| // OBSOLETE our_crc = crc32 ((unsigned char *) start, len, 0xffffffff); |
| // OBSOLETE mem2hex ((char *) &our_crc, |
| // OBSOLETE &remcomOutBuffer[1], |
| // OBSOLETE sizeof (long), |
| // OBSOLETE 0); |
| // OBSOLETE } /* else do nothing */ |
| // OBSOLETE } /* else do nothing */ |
| // OBSOLETE break; |
| // OBSOLETE |
| // OBSOLETE case 'k': /* kill the program */ |
| // OBSOLETE continue; |
| // OBSOLETE } /* switch */ |
| // OBSOLETE |
| // OBSOLETE /* reply to the request */ |
| // OBSOLETE putpacket(remcomOutBuffer); |
| // OBSOLETE } |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* qCRC support */ |
| // OBSOLETE |
| // OBSOLETE /* Table used by the crc32 function to calcuate the checksum. */ |
| // OBSOLETE static unsigned long crc32_table[256] = {0, 0}; |
| // OBSOLETE |
| // OBSOLETE static unsigned long |
| // OBSOLETE crc32 (unsigned char *buf, int len, unsigned long crc) |
| // OBSOLETE { |
| // OBSOLETE if (! crc32_table[1]) |
| // OBSOLETE { |
| // OBSOLETE /* Initialize the CRC table and the decoding table. */ |
| // OBSOLETE int i, j; |
| // OBSOLETE unsigned long c; |
| // OBSOLETE |
| // OBSOLETE for (i = 0; i < 256; i++) |
| // OBSOLETE { |
| // OBSOLETE for (c = i << 24, j = 8; j > 0; --j) |
| // OBSOLETE c = c & 0x80000000 ? (c << 1) ^ 0x04c11db7 : (c << 1); |
| // OBSOLETE crc32_table[i] = c; |
| // OBSOLETE } |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE while (len--) |
| // OBSOLETE { |
| // OBSOLETE crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ *buf) & 255]; |
| // OBSOLETE buf++; |
| // OBSOLETE } |
| // OBSOLETE return crc; |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE static int |
| // OBSOLETE hex (unsigned char ch) |
| // OBSOLETE { |
| // OBSOLETE if ((ch >= 'a') && (ch <= 'f')) return (ch-'a'+10); |
| // OBSOLETE if ((ch >= '0') && (ch <= '9')) return (ch-'0'); |
| // OBSOLETE if ((ch >= 'A') && (ch <= 'F')) return (ch-'A'+10); |
| // OBSOLETE return (-1); |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* scan for the sequence $<data>#<checksum> */ |
| // OBSOLETE |
| // OBSOLETE unsigned char * |
| // OBSOLETE getpacket (void) |
| // OBSOLETE { |
| // OBSOLETE unsigned char *buffer = &remcomInBuffer[0]; |
| // OBSOLETE unsigned char checksum; |
| // OBSOLETE unsigned char xmitcsum; |
| // OBSOLETE int count; |
| // OBSOLETE char ch; |
| // OBSOLETE |
| // OBSOLETE while (1) |
| // OBSOLETE { |
| // OBSOLETE /* wait around for the start character, ignore all other characters */ |
| // OBSOLETE while ((ch = getDebugChar ()) != '$') |
| // OBSOLETE ; |
| // OBSOLETE |
| // OBSOLETE retry: |
| // OBSOLETE checksum = 0; |
| // OBSOLETE xmitcsum = -1; |
| // OBSOLETE count = 0; |
| // OBSOLETE |
| // OBSOLETE /* now, read until a # or end of buffer is found */ |
| // OBSOLETE while (count < BUFMAX) |
| // OBSOLETE { |
| // OBSOLETE ch = getDebugChar (); |
| // OBSOLETE if (ch == '$') |
| // OBSOLETE goto retry; |
| // OBSOLETE if (ch == '#') |
| // OBSOLETE break; |
| // OBSOLETE checksum = checksum + ch; |
| // OBSOLETE buffer[count] = ch; |
| // OBSOLETE count = count + 1; |
| // OBSOLETE } |
| // OBSOLETE buffer[count] = 0; |
| // OBSOLETE |
| // OBSOLETE if (ch == '#') |
| // OBSOLETE { |
| // OBSOLETE ch = getDebugChar (); |
| // OBSOLETE xmitcsum = hex (ch) << 4; |
| // OBSOLETE ch = getDebugChar (); |
| // OBSOLETE xmitcsum += hex (ch); |
| // OBSOLETE |
| // OBSOLETE if (checksum != xmitcsum) |
| // OBSOLETE { |
| // OBSOLETE if (remote_debug) |
| // OBSOLETE { |
| // OBSOLETE unsigned char buf[16]; |
| // OBSOLETE |
| // OBSOLETE mem2hex((unsigned char *) &checksum, buf, 4, 0); |
| // OBSOLETE gdb_error("Bad checksum: my count = %s, ", buf); |
| // OBSOLETE mem2hex((unsigned char *) &xmitcsum, buf, 4, 0); |
| // OBSOLETE gdb_error("sent count = %s\n", buf); |
| // OBSOLETE gdb_error(" -- Bad buffer: \"%s\"\n", buffer); |
| // OBSOLETE } |
| // OBSOLETE putDebugChar ('-'); /* failed checksum */ |
| // OBSOLETE } |
| // OBSOLETE else |
| // OBSOLETE { |
| // OBSOLETE putDebugChar ('+'); /* successful transfer */ |
| // OBSOLETE |
| // OBSOLETE /* if a sequence char is present, reply the sequence ID */ |
| // OBSOLETE if (buffer[2] == ':') |
| // OBSOLETE { |
| // OBSOLETE putDebugChar (buffer[0]); |
| // OBSOLETE putDebugChar (buffer[1]); |
| // OBSOLETE |
| // OBSOLETE return &buffer[3]; |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE return &buffer[0]; |
| // OBSOLETE } |
| // OBSOLETE } |
| // OBSOLETE } |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* send the packet in buffer. */ |
| // OBSOLETE |
| // OBSOLETE static void |
| // OBSOLETE putpacket (unsigned char *buffer) |
| // OBSOLETE { |
| // OBSOLETE unsigned char checksum; |
| // OBSOLETE int count; |
| // OBSOLETE char ch; |
| // OBSOLETE |
| // OBSOLETE /* $<packet info>#<checksum>. */ |
| // OBSOLETE do { |
| // OBSOLETE putDebugChar('$'); |
| // OBSOLETE checksum = 0; |
| // OBSOLETE count = 0; |
| // OBSOLETE |
| // OBSOLETE while (ch=buffer[count]) { |
| // OBSOLETE putDebugChar(ch); |
| // OBSOLETE checksum += ch; |
| // OBSOLETE count += 1; |
| // OBSOLETE } |
| // OBSOLETE putDebugChar('#'); |
| // OBSOLETE putDebugChar(hexchars[checksum >> 4]); |
| // OBSOLETE putDebugChar(hexchars[checksum % 16]); |
| // OBSOLETE } while (getDebugChar() != '+'); |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* Address of a routine to RTE to if we get a memory fault. */ |
| // OBSOLETE |
| // OBSOLETE static void (*volatile mem_fault_routine)() = 0; |
| // OBSOLETE |
| // OBSOLETE static void |
| // OBSOLETE set_mem_err (void) |
| // OBSOLETE { |
| // OBSOLETE mem_err = 1; |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* Check the address for safe access ranges. As currently defined, |
| // OBSOLETE this routine will reject the "expansion bus" address range(s). |
| // OBSOLETE To make those ranges useable, someone must implement code to detect |
| // OBSOLETE whether there's anything connected to the expansion bus. */ |
| // OBSOLETE |
| // OBSOLETE static int |
| // OBSOLETE mem_safe (unsigned char *addr) |
| // OBSOLETE { |
| // OBSOLETE #define BAD_RANGE_ONE_START ((unsigned char *) 0x600000) |
| // OBSOLETE #define BAD_RANGE_ONE_END ((unsigned char *) 0xa00000) |
| // OBSOLETE #define BAD_RANGE_TWO_START ((unsigned char *) 0xff680000) |
| // OBSOLETE #define BAD_RANGE_TWO_END ((unsigned char *) 0xff800000) |
| // OBSOLETE |
| // OBSOLETE if (addr < BAD_RANGE_ONE_START) return 1; /* safe */ |
| // OBSOLETE if (addr < BAD_RANGE_ONE_END) return 0; /* unsafe */ |
| // OBSOLETE if (addr < BAD_RANGE_TWO_START) return 1; /* safe */ |
| // OBSOLETE if (addr < BAD_RANGE_TWO_END) return 0; /* unsafe */ |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* These are separate functions so that they are so short and sweet |
| // OBSOLETE that the compiler won't save any registers (if there is a fault |
| // OBSOLETE to mem_fault, they won't get restored, so there better not be any |
| // OBSOLETE saved). */ |
| // OBSOLETE static int |
| // OBSOLETE get_char (unsigned char *addr) |
| // OBSOLETE { |
| // OBSOLETE #if 1 |
| // OBSOLETE if (mem_fault_routine && !mem_safe(addr)) |
| // OBSOLETE { |
| // OBSOLETE mem_fault_routine (); |
| // OBSOLETE return 0; |
| // OBSOLETE } |
| // OBSOLETE #endif |
| // OBSOLETE return *addr; |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE static void |
| // OBSOLETE set_char (unsigned char *addr, unsigned char val) |
| // OBSOLETE { |
| // OBSOLETE #if 1 |
| // OBSOLETE if (mem_fault_routine && !mem_safe (addr)) |
| // OBSOLETE { |
| // OBSOLETE mem_fault_routine (); |
| // OBSOLETE return; |
| // OBSOLETE } |
| // OBSOLETE #endif |
| // OBSOLETE *addr = val; |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* Convert the memory pointed to by mem into hex, placing result in buf. |
| // OBSOLETE Return a pointer to the last char put in buf (null). |
| // OBSOLETE If MAY_FAULT is non-zero, then we should set mem_err in response to |
| // OBSOLETE a fault; if zero treat a fault like any other fault in the stub. */ |
| // OBSOLETE |
| // OBSOLETE static unsigned char * |
| // OBSOLETE mem2hex (unsigned char *mem, unsigned char *buf, int count, int may_fault) |
| // OBSOLETE { |
| // OBSOLETE int i; |
| // OBSOLETE unsigned char ch; |
| // OBSOLETE |
| // OBSOLETE if (may_fault) |
| // OBSOLETE mem_fault_routine = set_mem_err; |
| // OBSOLETE for (i=0;i<count;i++) { |
| // OBSOLETE ch = get_char (mem++); |
| // OBSOLETE if (may_fault && mem_err) |
| // OBSOLETE return (buf); |
| // OBSOLETE *buf++ = hexchars[ch >> 4]; |
| // OBSOLETE *buf++ = hexchars[ch % 16]; |
| // OBSOLETE } |
| // OBSOLETE *buf = 0; |
| // OBSOLETE if (may_fault) |
| // OBSOLETE mem_fault_routine = 0; |
| // OBSOLETE return(buf); |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* Convert the hex array pointed to by buf into binary to be placed in mem. |
| // OBSOLETE Return a pointer to the character AFTER the last byte written. */ |
| // OBSOLETE |
| // OBSOLETE static unsigned char* |
| // OBSOLETE hex2mem (unsigned char *buf, unsigned char *mem, int count, int may_fault) |
| // OBSOLETE { |
| // OBSOLETE int i; |
| // OBSOLETE unsigned char ch; |
| // OBSOLETE |
| // OBSOLETE if (may_fault) |
| // OBSOLETE mem_fault_routine = set_mem_err; |
| // OBSOLETE for (i=0;i<count;i++) { |
| // OBSOLETE ch = hex(*buf++) << 4; |
| // OBSOLETE ch = ch + hex(*buf++); |
| // OBSOLETE set_char (mem++, ch); |
| // OBSOLETE if (may_fault && mem_err) |
| // OBSOLETE return (mem); |
| // OBSOLETE } |
| // OBSOLETE if (may_fault) |
| // OBSOLETE mem_fault_routine = 0; |
| // OBSOLETE return(mem); |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* Convert the binary stream in BUF to memory. |
| // OBSOLETE |
| // OBSOLETE Gdb will escape $, #, and the escape char (0x7d). |
| // OBSOLETE COUNT is the total number of bytes to write into |
| // OBSOLETE memory. */ |
| // OBSOLETE static unsigned char * |
| // OBSOLETE bin2mem (unsigned char *buf, unsigned char *mem, int count, int may_fault) |
| // OBSOLETE { |
| // OBSOLETE int i; |
| // OBSOLETE unsigned char ch; |
| // OBSOLETE |
| // OBSOLETE if (may_fault) |
| // OBSOLETE mem_fault_routine = set_mem_err; |
| // OBSOLETE for (i = 0; i < count; i++) |
| // OBSOLETE { |
| // OBSOLETE /* Check for any escaped characters. Be paranoid and |
| // OBSOLETE only unescape chars that should be escaped. */ |
| // OBSOLETE if (*buf == 0x7d) |
| // OBSOLETE { |
| // OBSOLETE switch (*(buf+1)) |
| // OBSOLETE { |
| // OBSOLETE case 0x3: /* # */ |
| // OBSOLETE case 0x4: /* $ */ |
| // OBSOLETE case 0x5d: /* escape char */ |
| // OBSOLETE buf++; |
| // OBSOLETE *buf |= 0x20; |
| // OBSOLETE break; |
| // OBSOLETE default: |
| // OBSOLETE /* nothing */ |
| // OBSOLETE break; |
| // OBSOLETE } |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE set_char (mem++, *buf++); |
| // OBSOLETE |
| // OBSOLETE if (may_fault && mem_err) |
| // OBSOLETE return mem; |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE if (may_fault) |
| // OBSOLETE mem_fault_routine = 0; |
| // OBSOLETE return mem; |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* this function takes the m32r exception vector and attempts to |
| // OBSOLETE translate this number into a unix compatible signal value */ |
| // OBSOLETE |
| // OBSOLETE static int |
| // OBSOLETE computeSignal (int exceptionVector) |
| // OBSOLETE { |
| // OBSOLETE int sigval; |
| // OBSOLETE switch (exceptionVector) { |
| // OBSOLETE case 0 : sigval = 23; break; /* I/O trap */ |
| // OBSOLETE case 1 : sigval = 5; break; /* breakpoint */ |
| // OBSOLETE case 2 : sigval = 5; break; /* breakpoint */ |
| // OBSOLETE case 3 : sigval = 5; break; /* breakpoint */ |
| // OBSOLETE case 4 : sigval = 5; break; /* breakpoint */ |
| // OBSOLETE case 5 : sigval = 5; break; /* breakpoint */ |
| // OBSOLETE case 6 : sigval = 5; break; /* breakpoint */ |
| // OBSOLETE case 7 : sigval = 5; break; /* breakpoint */ |
| // OBSOLETE case 8 : sigval = 5; break; /* breakpoint */ |
| // OBSOLETE case 9 : sigval = 5; break; /* breakpoint */ |
| // OBSOLETE case 10 : sigval = 5; break; /* breakpoint */ |
| // OBSOLETE case 11 : sigval = 5; break; /* breakpoint */ |
| // OBSOLETE case 12 : sigval = 5; break; /* breakpoint */ |
| // OBSOLETE case 13 : sigval = 5; break; /* breakpoint */ |
| // OBSOLETE case 14 : sigval = 5; break; /* breakpoint */ |
| // OBSOLETE case 15 : sigval = 5; break; /* breakpoint */ |
| // OBSOLETE case 16 : sigval = 10; break; /* BUS ERROR (alignment) */ |
| // OBSOLETE case 17 : sigval = 2; break; /* INTerrupt */ |
| // OBSOLETE default : sigval = 7; break; /* "software generated" */ |
| // OBSOLETE } |
| // OBSOLETE return (sigval); |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /**********************************************/ |
| // OBSOLETE /* WHILE WE FIND NICE HEX CHARS, BUILD AN INT */ |
| // OBSOLETE /* RETURN NUMBER OF CHARS PROCESSED */ |
| // OBSOLETE /**********************************************/ |
| // OBSOLETE static int |
| // OBSOLETE hexToInt (unsigned char **ptr, int *intValue) |
| // OBSOLETE { |
| // OBSOLETE int numChars = 0; |
| // OBSOLETE int hexValue; |
| // OBSOLETE |
| // OBSOLETE *intValue = 0; |
| // OBSOLETE while (**ptr) |
| // OBSOLETE { |
| // OBSOLETE hexValue = hex(**ptr); |
| // OBSOLETE if (hexValue >=0) |
| // OBSOLETE { |
| // OBSOLETE *intValue = (*intValue <<4) | hexValue; |
| // OBSOLETE numChars ++; |
| // OBSOLETE } |
| // OBSOLETE else |
| // OBSOLETE break; |
| // OBSOLETE (*ptr)++; |
| // OBSOLETE } |
| // OBSOLETE return (numChars); |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* |
| // OBSOLETE Table of branch instructions: |
| // OBSOLETE |
| // OBSOLETE 10B6 RTE return from trap or exception |
| // OBSOLETE 1FCr JMP jump |
| // OBSOLETE 1ECr JL jump and link |
| // OBSOLETE 7Fxx BRA branch |
| // OBSOLETE FFxxxxxx BRA branch (long) |
| // OBSOLETE B09rxxxx BNEZ branch not-equal-zero |
| // OBSOLETE Br1rxxxx BNE branch not-equal |
| // OBSOLETE 7Dxx BNC branch not-condition |
| // OBSOLETE FDxxxxxx BNC branch not-condition (long) |
| // OBSOLETE B0Arxxxx BLTZ branch less-than-zero |
| // OBSOLETE B0Crxxxx BLEZ branch less-equal-zero |
| // OBSOLETE 7Exx BL branch and link |
| // OBSOLETE FExxxxxx BL branch and link (long) |
| // OBSOLETE B0Drxxxx BGTZ branch greater-than-zero |
| // OBSOLETE B0Brxxxx BGEZ branch greater-equal-zero |
| // OBSOLETE B08rxxxx BEQZ branch equal-zero |
| // OBSOLETE Br0rxxxx BEQ branch equal |
| // OBSOLETE 7Cxx BC branch condition |
| // OBSOLETE FCxxxxxx BC branch condition (long) |
| // OBSOLETE */ |
| // OBSOLETE |
| // OBSOLETE static int |
| // OBSOLETE isShortBranch (unsigned char *instr) |
| // OBSOLETE { |
| // OBSOLETE unsigned char instr0 = instr[0] & 0x7F; /* mask off high bit */ |
| // OBSOLETE |
| // OBSOLETE if (instr0 == 0x10 && instr[1] == 0xB6) /* RTE */ |
| // OBSOLETE return 1; /* return from trap or exception */ |
| // OBSOLETE |
| // OBSOLETE if (instr0 == 0x1E || instr0 == 0x1F) /* JL or JMP */ |
| // OBSOLETE if ((instr[1] & 0xF0) == 0xC0) |
| // OBSOLETE return 2; /* jump thru a register */ |
| // OBSOLETE |
| // OBSOLETE if (instr0 == 0x7C || instr0 == 0x7D || /* BC, BNC, BL, BRA */ |
| // OBSOLETE instr0 == 0x7E || instr0 == 0x7F) |
| // OBSOLETE return 3; /* eight bit PC offset */ |
| // OBSOLETE |
| // OBSOLETE return 0; |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE static int |
| // OBSOLETE isLongBranch (unsigned char *instr) |
| // OBSOLETE { |
| // OBSOLETE if (instr[0] == 0xFC || instr[0] == 0xFD || /* BRA, BNC, BL, BC */ |
| // OBSOLETE instr[0] == 0xFE || instr[0] == 0xFF) /* 24 bit relative */ |
| // OBSOLETE return 4; |
| // OBSOLETE if ((instr[0] & 0xF0) == 0xB0) /* 16 bit relative */ |
| // OBSOLETE { |
| // OBSOLETE if ((instr[1] & 0xF0) == 0x00 || /* BNE, BEQ */ |
| // OBSOLETE (instr[1] & 0xF0) == 0x10) |
| // OBSOLETE return 5; |
| // OBSOLETE if (instr[0] == 0xB0) /* BNEZ, BLTZ, BLEZ, BGTZ, BGEZ, BEQZ */ |
| // OBSOLETE if ((instr[1] & 0xF0) == 0x80 || (instr[1] & 0xF0) == 0x90 || |
| // OBSOLETE (instr[1] & 0xF0) == 0xA0 || (instr[1] & 0xF0) == 0xB0 || |
| // OBSOLETE (instr[1] & 0xF0) == 0xC0 || (instr[1] & 0xF0) == 0xD0) |
| // OBSOLETE return 6; |
| // OBSOLETE } |
| // OBSOLETE return 0; |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* if address is NOT on a 4-byte boundary, or high-bit of instr is zero, |
| // OBSOLETE then it's a 2-byte instruction, else it's a 4-byte instruction. */ |
| // OBSOLETE |
| // OBSOLETE #define INSTRUCTION_SIZE(addr) \ |
| // OBSOLETE ((((int) addr & 2) || (((unsigned char *) addr)[0] & 0x80) == 0) ? 2 : 4) |
| // OBSOLETE |
| // OBSOLETE static int |
| // OBSOLETE isBranch (unsigned char *instr) |
| // OBSOLETE { |
| // OBSOLETE if (INSTRUCTION_SIZE(instr) == 2) |
| // OBSOLETE return isShortBranch(instr); |
| // OBSOLETE else |
| // OBSOLETE return isLongBranch(instr); |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE static int |
| // OBSOLETE willBranch (unsigned char *instr, int branchCode) |
| // OBSOLETE { |
| // OBSOLETE switch (branchCode) |
| // OBSOLETE { |
| // OBSOLETE case 0: return 0; /* not a branch */ |
| // OBSOLETE case 1: return 1; /* RTE */ |
| // OBSOLETE case 2: return 1; /* JL or JMP */ |
| // OBSOLETE case 3: /* BC, BNC, BL, BRA (short) */ |
| // OBSOLETE case 4: /* BC, BNC, BL, BRA (long) */ |
| // OBSOLETE switch (instr[0] & 0x0F) |
| // OBSOLETE { |
| // OBSOLETE case 0xC: /* Branch if Condition Register */ |
| // OBSOLETE return (registers[CBR] != 0); |
| // OBSOLETE case 0xD: /* Branch if NOT Condition Register */ |
| // OBSOLETE return (registers[CBR] == 0); |
| // OBSOLETE case 0xE: /* Branch and Link */ |
| // OBSOLETE case 0xF: /* Branch (unconditional) */ |
| // OBSOLETE return 1; |
| // OBSOLETE default: /* oops? */ |
| // OBSOLETE return 0; |
| // OBSOLETE } |
| // OBSOLETE case 5: /* BNE, BEQ */ |
| // OBSOLETE switch (instr[1] & 0xF0) |
| // OBSOLETE { |
| // OBSOLETE case 0x00: /* Branch if r1 equal to r2 */ |
| // OBSOLETE return (registers[instr[0] & 0x0F] == registers[instr[1] & 0x0F]); |
| // OBSOLETE case 0x10: /* Branch if r1 NOT equal to r2 */ |
| // OBSOLETE return (registers[instr[0] & 0x0F] != registers[instr[1] & 0x0F]); |
| // OBSOLETE default: /* oops? */ |
| // OBSOLETE return 0; |
| // OBSOLETE } |
| // OBSOLETE case 6: /* BNEZ, BLTZ, BLEZ, BGTZ, BGEZ ,BEQZ */ |
| // OBSOLETE switch (instr[1] & 0xF0) |
| // OBSOLETE { |
| // OBSOLETE case 0x80: /* Branch if reg equal to zero */ |
| // OBSOLETE return (registers[instr[1] & 0x0F] == 0); |
| // OBSOLETE case 0x90: /* Branch if reg NOT equal to zero */ |
| // OBSOLETE return (registers[instr[1] & 0x0F] != 0); |
| // OBSOLETE case 0xA0: /* Branch if reg less than zero */ |
| // OBSOLETE return (registers[instr[1] & 0x0F] < 0); |
| // OBSOLETE case 0xB0: /* Branch if reg greater or equal to zero */ |
| // OBSOLETE return (registers[instr[1] & 0x0F] >= 0); |
| // OBSOLETE case 0xC0: /* Branch if reg less than or equal to zero */ |
| // OBSOLETE return (registers[instr[1] & 0x0F] <= 0); |
| // OBSOLETE case 0xD0: /* Branch if reg greater than zero */ |
| // OBSOLETE return (registers[instr[1] & 0x0F] > 0); |
| // OBSOLETE default: /* oops? */ |
| // OBSOLETE return 0; |
| // OBSOLETE } |
| // OBSOLETE default: /* oops? */ |
| // OBSOLETE return 0; |
| // OBSOLETE } |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE static int |
| // OBSOLETE branchDestination (unsigned char *instr, int branchCode) |
| // OBSOLETE { |
| // OBSOLETE switch (branchCode) { |
| // OBSOLETE default: |
| // OBSOLETE case 0: /* not a branch */ |
| // OBSOLETE return 0; |
| // OBSOLETE case 1: /* RTE */ |
| // OBSOLETE return registers[BPC] & ~3; /* pop BPC into PC */ |
| // OBSOLETE case 2: /* JL or JMP */ |
| // OBSOLETE return registers[instr[1] & 0x0F] & ~3; /* jump thru a register */ |
| // OBSOLETE case 3: /* BC, BNC, BL, BRA (short, 8-bit relative offset) */ |
| // OBSOLETE return (((int) instr) & ~3) + ((char) instr[1] << 2); |
| // OBSOLETE case 4: /* BC, BNC, BL, BRA (long, 24-bit relative offset) */ |
| // OBSOLETE return ((int) instr + |
| // OBSOLETE ((((char) instr[1] << 16) | (instr[2] << 8) | (instr[3])) << 2)); |
| // OBSOLETE case 5: /* BNE, BEQ (16-bit relative offset) */ |
| // OBSOLETE case 6: /* BNEZ, BLTZ, BLEZ, BGTZ, BGEZ ,BEQZ (ditto) */ |
| // OBSOLETE return ((int) instr + ((((char) instr[2] << 8) | (instr[3])) << 2)); |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* An explanatory note: in the last three return expressions, I have |
| // OBSOLETE cast the most-significant byte of the return offset to char. |
| // OBSOLETE What this accomplishes is sign extension. If the other |
| // OBSOLETE less-significant bytes were signed as well, they would get sign |
| // OBSOLETE extended too and, if negative, their leading bits would clobber |
| // OBSOLETE the bits of the more-significant bytes ahead of them. There are |
| // OBSOLETE other ways I could have done this, but sign extension from |
| // OBSOLETE odd-sized integers is always a pain. */ |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE static void |
| // OBSOLETE branchSideEffects (unsigned char *instr, int branchCode) |
| // OBSOLETE { |
| // OBSOLETE switch (branchCode) |
| // OBSOLETE { |
| // OBSOLETE case 1: /* RTE */ |
| // OBSOLETE return; /* I <THINK> this is already handled... */ |
| // OBSOLETE case 2: /* JL (or JMP) */ |
| // OBSOLETE case 3: /* BL (or BC, BNC, BRA) */ |
| // OBSOLETE case 4: |
| // OBSOLETE if ((instr[0] & 0x0F) == 0x0E) /* branch/jump and link */ |
| // OBSOLETE registers[R14] = (registers[PC] & ~3) + 4; |
| // OBSOLETE return; |
| // OBSOLETE default: /* any other branch has no side effects */ |
| // OBSOLETE return; |
| // OBSOLETE } |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE static struct STEPPING_CONTEXT { |
| // OBSOLETE int stepping; /* true when we've started a single-step */ |
| // OBSOLETE unsigned long target_addr; /* the instr we're trying to execute */ |
| // OBSOLETE unsigned long target_size; /* the size of the target instr */ |
| // OBSOLETE unsigned long noop_addr; /* where we've inserted a no-op, if any */ |
| // OBSOLETE unsigned long trap1_addr; /* the trap following the target instr */ |
| // OBSOLETE unsigned long trap2_addr; /* the trap at a branch destination, if any */ |
| // OBSOLETE unsigned short noop_save; /* instruction overwritten by our no-op */ |
| // OBSOLETE unsigned short trap1_save; /* instruction overwritten by trap1 */ |
| // OBSOLETE unsigned short trap2_save; /* instruction overwritten by trap2 */ |
| // OBSOLETE unsigned short continue_p; /* true if NOT returning to gdb after step */ |
| // OBSOLETE } stepping; |
| // OBSOLETE |
| // OBSOLETE /* Function: prepare_to_step |
| // OBSOLETE Called from handle_exception to prepare the user program to single-step. |
| // OBSOLETE Places a trap instruction after the target instruction, with special |
| // OBSOLETE extra handling for branch instructions and for instructions in the |
| // OBSOLETE second half-word of a word. |
| // OBSOLETE |
| // OBSOLETE Returns: True if we should actually execute the instruction; |
| // OBSOLETE False if we are going to emulate executing the instruction, |
| // OBSOLETE in which case we simply report to GDB that the instruction |
| // OBSOLETE has already been executed. */ |
| // OBSOLETE |
| // OBSOLETE #define TRAP1 0x10f1; /* trap #1 instruction */ |
| // OBSOLETE #define NOOP 0x7000; /* noop instruction */ |
| // OBSOLETE |
| // OBSOLETE static unsigned short trap1 = TRAP1; |
| // OBSOLETE static unsigned short noop = NOOP; |
| // OBSOLETE |
| // OBSOLETE static int |
| // OBSOLETE prepare_to_step(continue_p) |
| // OBSOLETE int continue_p; /* if this isn't REALLY a single-step (see below) */ |
| // OBSOLETE { |
| // OBSOLETE unsigned long pc = registers[PC]; |
| // OBSOLETE int branchCode = isBranch((unsigned char *) pc); |
| // OBSOLETE unsigned char *p; |
| // OBSOLETE |
| // OBSOLETE /* zero out the stepping context |
| // OBSOLETE (paranoia -- it should already be zeroed) */ |
| // OBSOLETE for (p = (unsigned char *) &stepping; |
| // OBSOLETE p < ((unsigned char *) &stepping) + sizeof(stepping); |
| // OBSOLETE p++) |
| // OBSOLETE *p = 0; |
| // OBSOLETE |
| // OBSOLETE if (branchCode != 0) /* next instruction is a branch */ |
| // OBSOLETE { |
| // OBSOLETE branchSideEffects((unsigned char *) pc, branchCode); |
| // OBSOLETE if (willBranch((unsigned char *)pc, branchCode)) |
| // OBSOLETE registers[PC] = branchDestination((unsigned char *) pc, branchCode); |
| // OBSOLETE else |
| // OBSOLETE registers[PC] = pc + INSTRUCTION_SIZE(pc); |
| // OBSOLETE return 0; /* branch "executed" -- just notify GDB */ |
| // OBSOLETE } |
| // OBSOLETE else if (((int) pc & 2) != 0) /* "second-slot" instruction */ |
| // OBSOLETE { |
| // OBSOLETE /* insert no-op before pc */ |
| // OBSOLETE stepping.noop_addr = pc - 2; |
| // OBSOLETE stepping.noop_save = *(unsigned short *) stepping.noop_addr; |
| // OBSOLETE *(unsigned short *) stepping.noop_addr = noop; |
| // OBSOLETE /* insert trap after pc */ |
| // OBSOLETE stepping.trap1_addr = pc + 2; |
| // OBSOLETE stepping.trap1_save = *(unsigned short *) stepping.trap1_addr; |
| // OBSOLETE *(unsigned short *) stepping.trap1_addr = trap1; |
| // OBSOLETE } |
| // OBSOLETE else /* "first-slot" instruction */ |
| // OBSOLETE { |
| // OBSOLETE /* insert trap after pc */ |
| // OBSOLETE stepping.trap1_addr = pc + INSTRUCTION_SIZE(pc); |
| // OBSOLETE stepping.trap1_save = *(unsigned short *) stepping.trap1_addr; |
| // OBSOLETE *(unsigned short *) stepping.trap1_addr = trap1; |
| // OBSOLETE } |
| // OBSOLETE /* "continue_p" means that we are actually doing a continue, and not |
| // OBSOLETE being requested to single-step by GDB. Sometimes we have to do |
| // OBSOLETE one single-step before continuing, because the PC is on a half-word |
| // OBSOLETE boundary. There's no way to simply resume at such an address. */ |
| // OBSOLETE stepping.continue_p = continue_p; |
| // OBSOLETE stepping.stepping = 1; /* starting a single-step */ |
| // OBSOLETE return 1; |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* Function: finish_from_step |
| // OBSOLETE Called from handle_exception to finish up when the user program |
| // OBSOLETE returns from a single-step. Replaces the instructions that had |
| // OBSOLETE been overwritten by traps or no-ops, |
| // OBSOLETE |
| // OBSOLETE Returns: True if we should notify GDB that the target stopped. |
| // OBSOLETE False if we only single-stepped because we had to before we |
| // OBSOLETE could continue (ie. we were trying to continue at a |
| // OBSOLETE half-word boundary). In that case don't notify GDB: |
| // OBSOLETE just "continue continuing". */ |
| // OBSOLETE |
| // OBSOLETE static int |
| // OBSOLETE finish_from_step (void) |
| // OBSOLETE { |
| // OBSOLETE if (stepping.stepping) /* anything to do? */ |
| // OBSOLETE { |
| // OBSOLETE int continue_p = stepping.continue_p; |
| // OBSOLETE unsigned char *p; |
| // OBSOLETE |
| // OBSOLETE if (stepping.noop_addr) /* replace instr "under" our no-op */ |
| // OBSOLETE *(unsigned short *) stepping.noop_addr = stepping.noop_save; |
| // OBSOLETE if (stepping.trap1_addr) /* replace instr "under" our trap */ |
| // OBSOLETE *(unsigned short *) stepping.trap1_addr = stepping.trap1_save; |
| // OBSOLETE if (stepping.trap2_addr) /* ditto our other trap, if any */ |
| // OBSOLETE *(unsigned short *) stepping.trap2_addr = stepping.trap2_save; |
| // OBSOLETE |
| // OBSOLETE for (p = (unsigned char *) &stepping; /* zero out the stepping context */ |
| // OBSOLETE p < ((unsigned char *) &stepping) + sizeof(stepping); |
| // OBSOLETE p++) |
| // OBSOLETE *p = 0; |
| // OBSOLETE |
| // OBSOLETE return !(continue_p); |
| // OBSOLETE } |
| // OBSOLETE else /* we didn't single-step, therefore this must be a legitimate stop */ |
| // OBSOLETE return 1; |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE struct PSWreg { /* separate out the bit flags in the PSW register */ |
| // OBSOLETE int pad1 : 16; |
| // OBSOLETE int bsm : 1; |
| // OBSOLETE int bie : 1; |
| // OBSOLETE int pad2 : 5; |
| // OBSOLETE int bc : 1; |
| // OBSOLETE int sm : 1; |
| // OBSOLETE int ie : 1; |
| // OBSOLETE int pad3 : 5; |
| // OBSOLETE int c : 1; |
| // OBSOLETE } *psw; |
| // OBSOLETE |
| // OBSOLETE /* Upon entry the value for LR to save has been pushed. |
| // OBSOLETE We unpush that so that the value for the stack pointer saved is correct. |
| // OBSOLETE Upon entry, all other registers are assumed to have not been modified |
| // OBSOLETE since the interrupt/trap occured. */ |
| // OBSOLETE |
| // OBSOLETE asm (" |
| // OBSOLETE stash_registers: |
| // OBSOLETE push r0 |
| // OBSOLETE push r1 |
| // OBSOLETE seth r1, #shigh(registers) |
| // OBSOLETE add3 r1, r1, #low(registers) |
| // OBSOLETE pop r0 ; r1 |
| // OBSOLETE st r0, @(4,r1) |
| // OBSOLETE pop r0 ; r0 |
| // OBSOLETE st r0, @r1 |
| // OBSOLETE addi r1, #4 ; only add 4 as subsequent saves are `pre inc' |
| // OBSOLETE st r2, @+r1 |
| // OBSOLETE st r3, @+r1 |
| // OBSOLETE st r4, @+r1 |
| // OBSOLETE st r5, @+r1 |
| // OBSOLETE st r6, @+r1 |
| // OBSOLETE st r7, @+r1 |
| // OBSOLETE st r8, @+r1 |
| // OBSOLETE st r9, @+r1 |
| // OBSOLETE st r10, @+r1 |
| // OBSOLETE st r11, @+r1 |
| // OBSOLETE st r12, @+r1 |
| // OBSOLETE st r13, @+r1 ; fp |
| // OBSOLETE pop r0 ; lr (r14) |
| // OBSOLETE st r0, @+r1 |
| // OBSOLETE st sp, @+r1 ; sp contains right value at this point |
| // OBSOLETE mvfc r0, cr0 |
| // OBSOLETE st r0, @+r1 ; cr0 == PSW |
| // OBSOLETE mvfc r0, cr1 |
| // OBSOLETE st r0, @+r1 ; cr1 == CBR |
| // OBSOLETE mvfc r0, cr2 |
| // OBSOLETE st r0, @+r1 ; cr2 == SPI |
| // OBSOLETE mvfc r0, cr3 |
| // OBSOLETE st r0, @+r1 ; cr3 == SPU |
| // OBSOLETE mvfc r0, cr6 |
| // OBSOLETE st r0, @+r1 ; cr6 == BPC |
| // OBSOLETE st r0, @+r1 ; PC == BPC |
| // OBSOLETE mvfaclo r0 |
| // OBSOLETE st r0, @+r1 ; ACCL |
| // OBSOLETE mvfachi r0 |
| // OBSOLETE st r0, @+r1 ; ACCH |
| // OBSOLETE jmp lr"); |
| // OBSOLETE |
| // OBSOLETE /* C routine to clean up what stash_registers did. |
| // OBSOLETE It is called after calling stash_registers. |
| // OBSOLETE This is separate from stash_registers as we want to do this in C |
| // OBSOLETE but doing stash_registers in C isn't straightforward. */ |
| // OBSOLETE |
| // OBSOLETE static void |
| // OBSOLETE cleanup_stash (void) |
| // OBSOLETE { |
| // OBSOLETE psw = (struct PSWreg *) ®isters[PSW]; /* fields of PSW register */ |
| // OBSOLETE psw->sm = psw->bsm; /* fix up pre-trap values of psw fields */ |
| // OBSOLETE psw->ie = psw->bie; |
| // OBSOLETE psw->c = psw->bc; |
| // OBSOLETE registers[CBR] = psw->bc; /* fix up pre-trap "C" register */ |
| // OBSOLETE |
| // OBSOLETE #if 0 /* FIXME: Was in previous version. Necessary? |
| // OBSOLETE (Remember that we use the "rte" insn to return from the |
| // OBSOLETE trap/interrupt so the values of bsm, bie, bc are important. */ |
| // OBSOLETE psw->bsm = psw->bie = psw->bc = 0; /* zero post-trap values */ |
| // OBSOLETE #endif |
| // OBSOLETE |
| // OBSOLETE /* FIXME: Copied from previous version. This can probably be deleted |
| // OBSOLETE since methinks stash_registers has already done this. */ |
| // OBSOLETE registers[PC] = registers[BPC]; /* pre-trap PC */ |
| // OBSOLETE |
| // OBSOLETE /* FIXME: Copied from previous version. Necessary? */ |
| // OBSOLETE if (psw->sm) /* copy R15 into (psw->sm ? SPU : SPI) */ |
| // OBSOLETE registers[SPU] = registers[R15]; |
| // OBSOLETE else |
| // OBSOLETE registers[SPI] = registers[R15]; |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE asm (" |
| // OBSOLETE restore_and_return: |
| // OBSOLETE seth r0, #shigh(registers+8) |
| // OBSOLETE add3 r0, r0, #low(registers+8) |
| // OBSOLETE ld r2, @r0+ ; restore r2 |
| // OBSOLETE ld r3, @r0+ ; restore r3 |
| // OBSOLETE ld r4, @r0+ ; restore r4 |
| // OBSOLETE ld r5, @r0+ ; restore r5 |
| // OBSOLETE ld r6, @r0+ ; restore r6 |
| // OBSOLETE ld r7, @r0+ ; restore r7 |
| // OBSOLETE ld r8, @r0+ ; restore r8 |
| // OBSOLETE ld r9, @r0+ ; restore r9 |
| // OBSOLETE ld r10, @r0+ ; restore r10 |
| // OBSOLETE ld r11, @r0+ ; restore r11 |
| // OBSOLETE ld r12, @r0+ ; restore r12 |
| // OBSOLETE ld r13, @r0+ ; restore r13 |
| // OBSOLETE ld r14, @r0+ ; restore r14 |
| // OBSOLETE ld r15, @r0+ ; restore r15 |
| // OBSOLETE addi r0, #4 ; don't restore PSW (rte will do it) |
| // OBSOLETE ld r1, @r0+ ; restore cr1 == CBR (no-op, because it's read only) |
| // OBSOLETE mvtc r1, cr1 |
| // OBSOLETE ld r1, @r0+ ; restore cr2 == SPI |
| // OBSOLETE mvtc r1, cr2 |
| // OBSOLETE ld r1, @r0+ ; restore cr3 == SPU |
| // OBSOLETE mvtc r1, cr3 |
| // OBSOLETE addi r0, #4 ; skip BPC |
| // OBSOLETE ld r1, @r0+ ; restore cr6 (BPC) == PC |
| // OBSOLETE mvtc r1, cr6 |
| // OBSOLETE ld r1, @r0+ ; restore ACCL |
| // OBSOLETE mvtaclo r1 |
| // OBSOLETE ld r1, @r0+ ; restore ACCH |
| // OBSOLETE mvtachi r1 |
| // OBSOLETE seth r0, #shigh(registers) |
| // OBSOLETE add3 r0, r0, #low(registers) |
| // OBSOLETE ld r1, @(4,r0) ; restore r1 |
| // OBSOLETE ld r0, @r0 ; restore r0 |
| // OBSOLETE rte"); |
| // OBSOLETE |
| // OBSOLETE /* General trap handler, called after the registers have been stashed. |
| // OBSOLETE NUM is the trap/exception number. */ |
| // OBSOLETE |
| // OBSOLETE static void |
| // OBSOLETE process_exception (int num) |
| // OBSOLETE { |
| // OBSOLETE cleanup_stash (); |
| // OBSOLETE asm volatile (" |
| // OBSOLETE seth r1, #shigh(stackPtr) |
| // OBSOLETE add3 r1, r1, #low(stackPtr) |
| // OBSOLETE ld r15, @r1 ; setup local stack (protect user stack) |
| // OBSOLETE mv r0, %0 |
| // OBSOLETE bl handle_exception |
| // OBSOLETE bl restore_and_return" |
| // OBSOLETE : : "r" (num) : "r0", "r1"); |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE void _catchException0 (); |
| // OBSOLETE |
| // OBSOLETE asm (" |
| // OBSOLETE _catchException0: |
| // OBSOLETE push lr |
| // OBSOLETE bl stash_registers |
| // OBSOLETE ; Note that at this point the pushed value of `lr' has been popped |
| // OBSOLETE ldi r0, #0 |
| // OBSOLETE bl process_exception"); |
| // OBSOLETE |
| // OBSOLETE void _catchException1 (); |
| // OBSOLETE |
| // OBSOLETE asm (" |
| // OBSOLETE _catchException1: |
| // OBSOLETE push lr |
| // OBSOLETE bl stash_registers |
| // OBSOLETE ; Note that at this point the pushed value of `lr' has been popped |
| // OBSOLETE bl cleanup_stash |
| // OBSOLETE seth r1, #shigh(stackPtr) |
| // OBSOLETE add3 r1, r1, #low(stackPtr) |
| // OBSOLETE ld r15, @r1 ; setup local stack (protect user stack) |
| // OBSOLETE seth r1, #shigh(registers + 21*4) ; PC |
| // OBSOLETE add3 r1, r1, #low(registers + 21*4) |
| // OBSOLETE ld r0, @r1 |
| // OBSOLETE addi r0, #-4 ; back up PC for breakpoint trap. |
| // OBSOLETE st r0, @r1 ; FIXME: what about bp in right slot? |
| // OBSOLETE ldi r0, #1 |
| // OBSOLETE bl handle_exception |
| // OBSOLETE bl restore_and_return"); |
| // OBSOLETE |
| // OBSOLETE void _catchException2 (); |
| // OBSOLETE |
| // OBSOLETE asm (" |
| // OBSOLETE _catchException2: |
| // OBSOLETE push lr |
| // OBSOLETE bl stash_registers |
| // OBSOLETE ; Note that at this point the pushed value of `lr' has been popped |
| // OBSOLETE ldi r0, #2 |
| // OBSOLETE bl process_exception"); |
| // OBSOLETE |
| // OBSOLETE void _catchException3 (); |
| // OBSOLETE |
| // OBSOLETE asm (" |
| // OBSOLETE _catchException3: |
| // OBSOLETE push lr |
| // OBSOLETE bl stash_registers |
| // OBSOLETE ; Note that at this point the pushed value of `lr' has been popped |
| // OBSOLETE ldi r0, #3 |
| // OBSOLETE bl process_exception"); |
| // OBSOLETE |
| // OBSOLETE void _catchException4 (); |
| // OBSOLETE |
| // OBSOLETE asm (" |
| // OBSOLETE _catchException4: |
| // OBSOLETE push lr |
| // OBSOLETE bl stash_registers |
| // OBSOLETE ; Note that at this point the pushed value of `lr' has been popped |
| // OBSOLETE ldi r0, #4 |
| // OBSOLETE bl process_exception"); |
| // OBSOLETE |
| // OBSOLETE void _catchException5 (); |
| // OBSOLETE |
| // OBSOLETE asm (" |
| // OBSOLETE _catchException5: |
| // OBSOLETE push lr |
| // OBSOLETE bl stash_registers |
| // OBSOLETE ; Note that at this point the pushed value of `lr' has been popped |
| // OBSOLETE ldi r0, #5 |
| // OBSOLETE bl process_exception"); |
| // OBSOLETE |
| // OBSOLETE void _catchException6 (); |
| // OBSOLETE |
| // OBSOLETE asm (" |
| // OBSOLETE _catchException6: |
| // OBSOLETE push lr |
| // OBSOLETE bl stash_registers |
| // OBSOLETE ; Note that at this point the pushed value of `lr' has been popped |
| // OBSOLETE ldi r0, #6 |
| // OBSOLETE bl process_exception"); |
| // OBSOLETE |
| // OBSOLETE void _catchException7 (); |
| // OBSOLETE |
| // OBSOLETE asm (" |
| // OBSOLETE _catchException7: |
| // OBSOLETE push lr |
| // OBSOLETE bl stash_registers |
| // OBSOLETE ; Note that at this point the pushed value of `lr' has been popped |
| // OBSOLETE ldi r0, #7 |
| // OBSOLETE bl process_exception"); |
| // OBSOLETE |
| // OBSOLETE void _catchException8 (); |
| // OBSOLETE |
| // OBSOLETE asm (" |
| // OBSOLETE _catchException8: |
| // OBSOLETE push lr |
| // OBSOLETE bl stash_registers |
| // OBSOLETE ; Note that at this point the pushed value of `lr' has been popped |
| // OBSOLETE ldi r0, #8 |
| // OBSOLETE bl process_exception"); |
| // OBSOLETE |
| // OBSOLETE void _catchException9 (); |
| // OBSOLETE |
| // OBSOLETE asm (" |
| // OBSOLETE _catchException9: |
| // OBSOLETE push lr |
| // OBSOLETE bl stash_registers |
| // OBSOLETE ; Note that at this point the pushed value of `lr' has been popped |
| // OBSOLETE ldi r0, #9 |
| // OBSOLETE bl process_exception"); |
| // OBSOLETE |
| // OBSOLETE void _catchException10 (); |
| // OBSOLETE |
| // OBSOLETE asm (" |
| // OBSOLETE _catchException10: |
| // OBSOLETE push lr |
| // OBSOLETE bl stash_registers |
| // OBSOLETE ; Note that at this point the pushed value of `lr' has been popped |
| // OBSOLETE ldi r0, #10 |
| // OBSOLETE bl process_exception"); |
| // OBSOLETE |
| // OBSOLETE void _catchException11 (); |
| // OBSOLETE |
| // OBSOLETE asm (" |
| // OBSOLETE _catchException11: |
| // OBSOLETE push lr |
| // OBSOLETE bl stash_registers |
| // OBSOLETE ; Note that at this point the pushed value of `lr' has been popped |
| // OBSOLETE ldi r0, #11 |
| // OBSOLETE bl process_exception"); |
| // OBSOLETE |
| // OBSOLETE void _catchException12 (); |
| // OBSOLETE |
| // OBSOLETE asm (" |
| // OBSOLETE _catchException12: |
| // OBSOLETE push lr |
| // OBSOLETE bl stash_registers |
| // OBSOLETE ; Note that at this point the pushed value of `lr' has been popped |
| // OBSOLETE ldi r0, #12 |
| // OBSOLETE bl process_exception"); |
| // OBSOLETE |
| // OBSOLETE void _catchException13 (); |
| // OBSOLETE |
| // OBSOLETE asm (" |
| // OBSOLETE _catchException13: |
| // OBSOLETE push lr |
| // OBSOLETE bl stash_registers |
| // OBSOLETE ; Note that at this point the pushed value of `lr' has been popped |
| // OBSOLETE ldi r0, #13 |
| // OBSOLETE bl process_exception"); |
| // OBSOLETE |
| // OBSOLETE void _catchException14 (); |
| // OBSOLETE |
| // OBSOLETE asm (" |
| // OBSOLETE _catchException14: |
| // OBSOLETE push lr |
| // OBSOLETE bl stash_registers |
| // OBSOLETE ; Note that at this point the pushed value of `lr' has been popped |
| // OBSOLETE ldi r0, #14 |
| // OBSOLETE bl process_exception"); |
| // OBSOLETE |
| // OBSOLETE void _catchException15 (); |
| // OBSOLETE |
| // OBSOLETE asm (" |
| // OBSOLETE _catchException15: |
| // OBSOLETE push lr |
| // OBSOLETE bl stash_registers |
| // OBSOLETE ; Note that at this point the pushed value of `lr' has been popped |
| // OBSOLETE ldi r0, #15 |
| // OBSOLETE bl process_exception"); |
| // OBSOLETE |
| // OBSOLETE void _catchException16 (); |
| // OBSOLETE |
| // OBSOLETE asm (" |
| // OBSOLETE _catchException16: |
| // OBSOLETE push lr |
| // OBSOLETE bl stash_registers |
| // OBSOLETE ; Note that at this point the pushed value of `lr' has been popped |
| // OBSOLETE ldi r0, #16 |
| // OBSOLETE bl process_exception"); |
| // OBSOLETE |
| // OBSOLETE void _catchException17 (); |
| // OBSOLETE |
| // OBSOLETE asm (" |
| // OBSOLETE _catchException17: |
| // OBSOLETE push lr |
| // OBSOLETE bl stash_registers |
| // OBSOLETE ; Note that at this point the pushed value of `lr' has been popped |
| // OBSOLETE ldi r0, #17 |
| // OBSOLETE bl process_exception"); |
| // OBSOLETE |
| // OBSOLETE |
| // OBSOLETE /* this function is used to set up exception handlers for tracing and |
| // OBSOLETE breakpoints */ |
| // OBSOLETE void |
| // OBSOLETE set_debug_traps (void) |
| // OBSOLETE { |
| // OBSOLETE /* extern void remcomHandler(); */ |
| // OBSOLETE int i; |
| // OBSOLETE |
| // OBSOLETE for (i = 0; i < 18; i++) /* keep a copy of old vectors */ |
| // OBSOLETE if (save_vectors[i] == 0) /* only copy them the first time */ |
| // OBSOLETE save_vectors[i] = getExceptionHandler (i); |
| // OBSOLETE |
| // OBSOLETE stackPtr = &remcomStack[STACKSIZE/sizeof(int) - 1]; |
| // OBSOLETE |
| // OBSOLETE exceptionHandler (0, _catchException0); |
| // OBSOLETE exceptionHandler (1, _catchException1); |
| // OBSOLETE exceptionHandler (2, _catchException2); |
| // OBSOLETE exceptionHandler (3, _catchException3); |
| // OBSOLETE exceptionHandler (4, _catchException4); |
| // OBSOLETE exceptionHandler (5, _catchException5); |
| // OBSOLETE exceptionHandler (6, _catchException6); |
| // OBSOLETE exceptionHandler (7, _catchException7); |
| // OBSOLETE exceptionHandler (8, _catchException8); |
| // OBSOLETE exceptionHandler (9, _catchException9); |
| // OBSOLETE exceptionHandler (10, _catchException10); |
| // OBSOLETE exceptionHandler (11, _catchException11); |
| // OBSOLETE exceptionHandler (12, _catchException12); |
| // OBSOLETE exceptionHandler (13, _catchException13); |
| // OBSOLETE exceptionHandler (14, _catchException14); |
| // OBSOLETE exceptionHandler (15, _catchException15); |
| // OBSOLETE exceptionHandler (16, _catchException16); |
| // OBSOLETE /* exceptionHandler (17, _catchException17); */ |
| // OBSOLETE |
| // OBSOLETE initialized = 1; |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* This function will generate a breakpoint exception. It is used at the |
| // OBSOLETE beginning of a program to sync up with a debugger and can be used |
| // OBSOLETE otherwise as a quick means to stop program execution and "break" into |
| // OBSOLETE the debugger. */ |
| // OBSOLETE |
| // OBSOLETE #define BREAKPOINT() asm volatile (" trap #2"); |
| // OBSOLETE |
| // OBSOLETE void |
| // OBSOLETE breakpoint (void) |
| // OBSOLETE { |
| // OBSOLETE if (initialized) |
| // OBSOLETE BREAKPOINT(); |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* STDOUT section: |
| // OBSOLETE Stuff pertaining to simulating stdout by sending chars to gdb to be echoed. |
| // OBSOLETE Functions: gdb_putchar(char ch) |
| // OBSOLETE gdb_puts(char *str) |
| // OBSOLETE gdb_write(char *str, int len) |
| // OBSOLETE gdb_error(char *format, char *parm) |
| // OBSOLETE */ |
| // OBSOLETE |
| // OBSOLETE /* Function: gdb_putchar(int) |
| // OBSOLETE Make gdb write a char to stdout. |
| // OBSOLETE Returns: the char */ |
| // OBSOLETE |
| // OBSOLETE static int |
| // OBSOLETE gdb_putchar (int ch) |
| // OBSOLETE { |
| // OBSOLETE char buf[4]; |
| // OBSOLETE |
| // OBSOLETE buf[0] = 'O'; |
| // OBSOLETE buf[1] = hexchars[ch >> 4]; |
| // OBSOLETE buf[2] = hexchars[ch & 0x0F]; |
| // OBSOLETE buf[3] = 0; |
| // OBSOLETE putpacket(buf); |
| // OBSOLETE return ch; |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* Function: gdb_write(char *, int) |
| // OBSOLETE Make gdb write n bytes to stdout (not assumed to be null-terminated). |
| // OBSOLETE Returns: number of bytes written */ |
| // OBSOLETE |
| // OBSOLETE static int |
| // OBSOLETE gdb_write (char *data, int len) |
| // OBSOLETE { |
| // OBSOLETE char *buf, *cpy; |
| // OBSOLETE int i; |
| // OBSOLETE |
| // OBSOLETE buf = remcomOutBuffer; |
| // OBSOLETE buf[0] = 'O'; |
| // OBSOLETE i = 0; |
| // OBSOLETE while (i < len) |
| // OBSOLETE { |
| // OBSOLETE for (cpy = buf+1; |
| // OBSOLETE i < len && cpy < buf + sizeof(remcomOutBuffer) - 3; |
| // OBSOLETE i++) |
| // OBSOLETE { |
| // OBSOLETE *cpy++ = hexchars[data[i] >> 4]; |
| // OBSOLETE *cpy++ = hexchars[data[i] & 0x0F]; |
| // OBSOLETE } |
| // OBSOLETE *cpy = 0; |
| // OBSOLETE putpacket(buf); |
| // OBSOLETE } |
| // OBSOLETE return len; |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* Function: gdb_puts(char *) |
| // OBSOLETE Make gdb write a null-terminated string to stdout. |
| // OBSOLETE Returns: the length of the string */ |
| // OBSOLETE |
| // OBSOLETE static int |
| // OBSOLETE gdb_puts (char *str) |
| // OBSOLETE { |
| // OBSOLETE return gdb_write(str, strlen(str)); |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE /* Function: gdb_error(char *, char *) |
| // OBSOLETE Send an error message to gdb's stdout. |
| // OBSOLETE First string may have 1 (one) optional "%s" in it, which |
| // OBSOLETE will cause the optional second string to be inserted. */ |
| // OBSOLETE |
| // OBSOLETE static void |
| // OBSOLETE gdb_error (char *format, char *parm) |
| // OBSOLETE { |
| // OBSOLETE char buf[400], *cpy; |
| // OBSOLETE int len; |
| // OBSOLETE |
| // OBSOLETE if (remote_debug) |
| // OBSOLETE { |
| // OBSOLETE if (format && *format) |
| // OBSOLETE len = strlen(format); |
| // OBSOLETE else |
| // OBSOLETE return; /* empty input */ |
| // OBSOLETE |
| // OBSOLETE if (parm && *parm) |
| // OBSOLETE len += strlen(parm); |
| // OBSOLETE |
| // OBSOLETE for (cpy = buf; *format; ) |
| // OBSOLETE { |
| // OBSOLETE if (format[0] == '%' && format[1] == 's') /* include second string */ |
| // OBSOLETE { |
| // OBSOLETE format += 2; /* advance two chars instead of just one */ |
| // OBSOLETE while (parm && *parm) |
| // OBSOLETE *cpy++ = *parm++; |
| // OBSOLETE } |
| // OBSOLETE else |
| // OBSOLETE *cpy++ = *format++; |
| // OBSOLETE } |
| // OBSOLETE *cpy = '\0'; |
| // OBSOLETE gdb_puts(buf); |
| // OBSOLETE } |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE static unsigned char * |
| // OBSOLETE strcpy (unsigned char *dest, const unsigned char *src) |
| // OBSOLETE { |
| // OBSOLETE unsigned char *ret = dest; |
| // OBSOLETE |
| // OBSOLETE if (dest && src) |
| // OBSOLETE { |
| // OBSOLETE while (*src) |
| // OBSOLETE *dest++ = *src++; |
| // OBSOLETE *dest = 0; |
| // OBSOLETE } |
| // OBSOLETE return ret; |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE static int |
| // OBSOLETE strlen (const unsigned char *src) |
| // OBSOLETE { |
| // OBSOLETE int ret; |
| // OBSOLETE |
| // OBSOLETE for (ret = 0; *src; src++) |
| // OBSOLETE ret++; |
| // OBSOLETE |
| // OBSOLETE return ret; |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE #if 0 |
| // OBSOLETE void exit (code) |
| // OBSOLETE int code; |
| // OBSOLETE { |
| // OBSOLETE _exit (code); |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE int atexit (void *p) |
| // OBSOLETE { |
| // OBSOLETE return 0; |
| // OBSOLETE } |
| // OBSOLETE |
| // OBSOLETE void abort (void) |
| // OBSOLETE { |
| // OBSOLETE _exit (1); |
| // OBSOLETE } |
| // OBSOLETE #endif |