-/****************************************************************************
-
- THIS SOFTWARE IS NOT COPYRIGHTED
-
- HP offers the following for use in the public domain. HP makes no
- warranty with regard to the software or it's performance and the
- user accepts the software "AS IS" with all faults.
-
- HP DISCLAIMS ANY WARRANTIES, EXPRESS OR IMPLIED, WITH REGARD
- TO THIS SOFTWARE INCLUDING BUT NOT LIMITED TO THE WARRANTIES
- OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
-
-****************************************************************************/
-
-/****************************************************************************
- * Header: remcom.c,v 1.34 91/03/09 12:29:49 glenne Exp $
- *
- * Module name: remcom.c $
- * Revision: 1.34 $
- * Date: 91/03/09 12:29:49 $
- * Contributor: Lake Stevens Instrument Division$
- *
- * Description: low level support for gdb debugger. $
- *
- * Considerations: only works on target hardware $
- *
- * Written by: Glenn Engel $
- * ModuleState: Experimental $
- *
- * NOTES: See Below $
- *
- * Modified for SPARC by Stu Grossman, Cygnus Support.
- * Based on sparc-stub.c, it's modified for SPARClite Debug Unit hardware
- * breakpoint support to create sparclite-stub.c, by Kung Hsu, Cygnus Support.
- *
- * This code has been extensively tested on the Fujitsu SPARClite demo board.
- *
- * To enable debugger support, two things need to happen. One, a
- * call to set_debug_traps() is necessary in order to allow any breakpoints
- * or error conditions to be properly intercepted and reported to gdb.
- * Two, a breakpoint needs to be generated to begin communication. This
- * is most easily accomplished by a call to breakpoint(). Breakpoint()
- * simulates a breakpoint by executing a trap #1.
- *
- *************
- *
- * The following gdb commands are supported:
- *
- * command function Return value
- *
- * g return the value of the CPU registers hex data or ENN
- * G set the value of the CPU registers OK or ENN
- * P set the value of a single CPU register OK or ENN
- *
- * mAA..AA,LLLL Read LLLL bytes at address AA..AA hex data or ENN
- * MAA..AA,LLLL: Write LLLL bytes at address AA.AA OK or ENN
- *
- * c Resume at current address SNN ( signal NN)
- * cAA..AA Continue at address AA..AA SNN
- *
- * s Step one instruction SNN
- * sAA..AA Step one instruction from AA..AA SNN
- *
- * k kill
- *
- * ? What was the last sigval ? SNN (signal NN)
- *
- * All commands and responses are sent with a packet which includes a
- * checksum. A packet consists of
- *
- * $<packet info>#<checksum>.
- *
- * where
- * <packet info> :: <characters representing the command or response>
- * <checksum> :: < two hex digits computed as modulo 256 sum of <packetinfo>>
- *
- * When a packet is received, it is first acknowledged with either '+' or '-'.
- * '+' indicates a successful transfer. '-' indicates a failed transfer.
- *
- * Example:
- *
- * Host: Reply:
- * $m0,10#2a +$00010203040506070809101112131415#42
- *
- ****************************************************************************/
-
-#include <string.h>
-#include <signal.h>
-#include <sparclite.h>
-
-/************************************************************************
- *
- * external low-level support routines
- */
-
-extern void putDebugChar (int c); /* write a single character */
-extern int getDebugChar (void); /* read and return a single char */
-
-/************************************************************************/
-/* BUFMAX defines the maximum number of characters in inbound/outbound buffers*/
-/* at least NUMREGBYTES*2 are needed for register packets */
-#define BUFMAX 2048
-
-static int initialized = 0; /* !0 means we've been initialized */
-
-extern void breakinst ();
-static void set_mem_fault_trap (int enable);
-static void get_in_break_mode (void);
-
-static const char hexchars[]="0123456789abcdef";
-
-#define NUMREGS 80
-
-/* Number of bytes of registers. */
-#define NUMREGBYTES (NUMREGS * 4)
-enum regnames {G0, G1, G2, G3, G4, G5, G6, G7,
- O0, O1, O2, O3, O4, O5, SP, O7,
- L0, L1, L2, L3, L4, L5, L6, L7,
- I0, I1, I2, I3, I4, I5, FP, I7,
-
- F0, F1, F2, F3, F4, F5, F6, F7,
- F8, F9, F10, F11, F12, F13, F14, F15,
- F16, F17, F18, F19, F20, F21, F22, F23,
- F24, F25, F26, F27, F28, F29, F30, F31,
- Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR,
- DIA1, DIA2, DDA1, DDA2, DDV1, DDV2, DCR, DSR };
-
-/*************************** ASSEMBLY CODE MACROS *************************/
-/* */
-
-extern void trap_low();
-
-/* Create private copies of common functions used by the stub. This prevents
- nasty interactions between app code and the stub (for instance if user steps
- into strlen, etc..) */
-
-static char *
-strcpy (char *dst, const char *src)
-{
- char *retval = dst;
-
- while ((*dst++ = *src++) != '\000');
-
- return retval;
-}
-
-static void *
-memcpy (void *vdst, const void *vsrc, int n)
-{
- char *dst = vdst;
- const char *src = vsrc;
- char *retval = dst;
-
- while (n-- > 0)
- *dst++ = *src++;
-
- return retval;
-}
-
-asm("
- .reserve trapstack, 1000 * 4, \"bss\", 8
-
- .data
- .align 4
-
-in_trap_handler:
- .word 0
-
- .text
- .align 4
-
-! This function is called when any SPARC trap (except window overflow or
-! underflow) occurs. It makes sure that the invalid register window is still
-! available before jumping into C code. It will also restore the world if you
-! return from handle_exception.
-!
-! On entry, trap_low expects l1 and l2 to contain pc and npc respectivly.
-! Register usage throughout the routine is as follows:
-!
-! l0 - psr
-! l1 - pc
-! l2 - npc
-! l3 - wim
-! l4 - scratch and y reg
-! l5 - scratch and tbr
-! l6 - unused
-! l7 - unused
-
- .globl _trap_low
-_trap_low:
- mov %psr, %l0
- mov %wim, %l3
-
- srl %l3, %l0, %l4 ! wim >> cwp
- cmp %l4, 1
- bne window_fine ! Branch if not in the invalid window
- nop
-
-! Handle window overflow
-
- mov %g1, %l4 ! Save g1, we use it to hold the wim
- srl %l3, 1, %g1 ! Rotate wim right
- tst %g1
- bg good_wim ! Branch if new wim is non-zero
- nop
-
-! At this point, we need to bring a 1 into the high order bit of the wim.
-! Since we don't want to make any assumptions about the number of register
-! windows, we figure it out dynamically so as to setup the wim correctly.
-
- not %g1 ! Fill g1 with ones
- mov %g1, %wim ! Fill the wim with ones
- nop
- nop
- nop
- mov %wim, %g1 ! Read back the wim
- inc %g1 ! Now g1 has 1 just to left of wim
- srl %g1, 1, %g1 ! Now put 1 at top of wim
- mov %g0, %wim ! Clear wim so that subsequent save
- nop ! won't trap
- nop
- nop
-
-good_wim:
- save %g0, %g0, %g0 ! Slip into next window
- mov %g1, %wim ! Install the new wim
-
- std %l0, [%sp + 0 * 4] ! save L & I registers
- std %l2, [%sp + 2 * 4]
- std %l4, [%sp + 4 * 4]
- std %l6, [%sp + 6 * 4]
-
- std %i0, [%sp + 8 * 4]
- std %i2, [%sp + 10 * 4]
- std %i4, [%sp + 12 * 4]
- std %i6, [%sp + 14 * 4]
-
- restore ! Go back to trap window.
- mov %l4, %g1 ! Restore %g1
-
-window_fine:
- sethi %hi(in_trap_handler), %l4
- ld [%lo(in_trap_handler) + %l4], %l5
- tst %l5
- bg recursive_trap
- inc %l5
-
- set trapstack+1000*4, %sp ! Switch to trap stack
-
-recursive_trap:
- st %l5, [%lo(in_trap_handler) + %l4]
- sub %sp,(16+1+6+1+80)*4,%sp ! Make room for input & locals
- ! + hidden arg + arg spill
- ! + doubleword alignment
- ! + registers[72] local var
-
- std %g0, [%sp + (24 + 0) * 4] ! registers[Gx]
- std %g2, [%sp + (24 + 2) * 4]
- std %g4, [%sp + (24 + 4) * 4]
- std %g6, [%sp + (24 + 6) * 4]
-
- std %i0, [%sp + (24 + 8) * 4] ! registers[Ox]
- std %i2, [%sp + (24 + 10) * 4]
- std %i4, [%sp + (24 + 12) * 4]
- std %i6, [%sp + (24 + 14) * 4]
-
- mov %y, %l4
- mov %tbr, %l5
- st %l4, [%sp + (24 + 64) * 4] ! Y
- st %l0, [%sp + (24 + 65) * 4] ! PSR
- st %l3, [%sp + (24 + 66) * 4] ! WIM
- st %l5, [%sp + (24 + 67) * 4] ! TBR
- st %l1, [%sp + (24 + 68) * 4] ! PC
- st %l2, [%sp + (24 + 69) * 4] ! NPC
-
- or %l0, 0xf20, %l4
- mov %l4, %psr ! Turn on traps, disable interrupts
-
- set 0x1000, %l1
- btst %l1, %l0 ! FP enabled?
- be no_fpstore
- nop
-
-! Must save fsr first, to flush the FQ. This may cause a deferred fp trap, so
-! traps must be enabled to allow the trap handler to clean things up.
-
- st %fsr, [%sp + (24 + 70) * 4]
-
- std %f0, [%sp + (24 + 32) * 4]
- std %f2, [%sp + (24 + 34) * 4]
- std %f4, [%sp + (24 + 36) * 4]
- std %f6, [%sp + (24 + 38) * 4]
- std %f8, [%sp + (24 + 40) * 4]
- std %f10, [%sp + (24 + 42) * 4]
- std %f12, [%sp + (24 + 44) * 4]
- std %f14, [%sp + (24 + 46) * 4]
- std %f16, [%sp + (24 + 48) * 4]
- std %f18, [%sp + (24 + 50) * 4]
- std %f20, [%sp + (24 + 52) * 4]
- std %f22, [%sp + (24 + 54) * 4]
- std %f24, [%sp + (24 + 56) * 4]
- std %f26, [%sp + (24 + 58) * 4]
- std %f28, [%sp + (24 + 60) * 4]
- std %f30, [%sp + (24 + 62) * 4]
-no_fpstore:
-
- call _handle_exception
- add %sp, 24 * 4, %o0 ! Pass address of registers
-
-! Reload all of the registers that aren't on the stack
-
- ld [%sp + (24 + 1) * 4], %g1 ! registers[Gx]
- ldd [%sp + (24 + 2) * 4], %g2
- ldd [%sp + (24 + 4) * 4], %g4
- ldd [%sp + (24 + 6) * 4], %g6
-
- ldd [%sp + (24 + 8) * 4], %i0 ! registers[Ox]
- ldd [%sp + (24 + 10) * 4], %i2
- ldd [%sp + (24 + 12) * 4], %i4
- ldd [%sp + (24 + 14) * 4], %i6
-
-
- ldd [%sp + (24 + 64) * 4], %l0 ! Y & PSR
- ldd [%sp + (24 + 68) * 4], %l2 ! PC & NPC
-
- set 0x1000, %l5
- btst %l5, %l1 ! FP enabled?
- be no_fpreload
- nop
-
- ldd [%sp + (24 + 32) * 4], %f0
- ldd [%sp + (24 + 34) * 4], %f2
- ldd [%sp + (24 + 36) * 4], %f4
- ldd [%sp + (24 + 38) * 4], %f6
- ldd [%sp + (24 + 40) * 4], %f8
- ldd [%sp + (24 + 42) * 4], %f10
- ldd [%sp + (24 + 44) * 4], %f12
- ldd [%sp + (24 + 46) * 4], %f14
- ldd [%sp + (24 + 48) * 4], %f16
- ldd [%sp + (24 + 50) * 4], %f18
- ldd [%sp + (24 + 52) * 4], %f20
- ldd [%sp + (24 + 54) * 4], %f22
- ldd [%sp + (24 + 56) * 4], %f24
- ldd [%sp + (24 + 58) * 4], %f26
- ldd [%sp + (24 + 60) * 4], %f28
- ldd [%sp + (24 + 62) * 4], %f30
-
- ld [%sp + (24 + 70) * 4], %fsr
-no_fpreload:
-
- restore ! Ensure that previous window is valid
- save %g0, %g0, %g0 ! by causing a window_underflow trap
-
- mov %l0, %y
- mov %l1, %psr ! Make sure that traps are disabled
- ! for rett
- sethi %hi(in_trap_handler), %l4
- ld [%lo(in_trap_handler) + %l4], %l5
- dec %l5
- st %l5, [%lo(in_trap_handler) + %l4]
-
- jmpl %l2, %g0 ! Restore old PC
- rett %l3 ! Restore old nPC
-");
-
-/* Convert ch from a hex digit to an int */
-
-static int
-hex(ch)
- unsigned char ch;
-{
- 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;
-}
-
-static char remcomInBuffer[BUFMAX];
-static char remcomOutBuffer[BUFMAX];
-
-/* scan for the sequence $<data>#<checksum> */
-
-unsigned char *
-getpacket ()
-{
- unsigned char *buffer = &remcomInBuffer[0];
- unsigned char checksum;
- unsigned char xmitcsum;
- int count;
- char ch;
-
- while (1)
- {
- /* wait around for the start character, ignore all other characters */
- while ((ch = getDebugChar ()) != '$')
- ;
-
-retry:
- checksum = 0;
- xmitcsum = -1;
- count = 0;
-
- /* now, read until a # or end of buffer is found */
- while (count < BUFMAX)
- {
- ch = getDebugChar ();
- if (ch == '$')
- goto retry;
- if (ch == '#')
- break;
- checksum = checksum + ch;
- buffer[count] = ch;
- count = count + 1;
- }
- buffer[count] = 0;
-
- if (ch == '#')
- {
- ch = getDebugChar ();
- xmitcsum = hex (ch) << 4;
- ch = getDebugChar ();
- xmitcsum += hex (ch);
-
- if (checksum != xmitcsum)
- {
- putDebugChar ('-'); /* failed checksum */
- }
- else
- {
- putDebugChar ('+'); /* successful transfer */
-
- /* if a sequence char is present, reply the sequence ID */
- if (buffer[2] == ':')
- {
- putDebugChar (buffer[0]);
- putDebugChar (buffer[1]);
-
- return &buffer[3];
- }
-
- return &buffer[0];
- }
- }
- }
-}
-
-/* send the packet in buffer. */
-
-static void
-putpacket(buffer)
- unsigned char *buffer;
-{
- unsigned char checksum;
- int count;
- unsigned char ch;
-
- /* $<packet info>#<checksum>. */
- do
- {
- putDebugChar('$');
- checksum = 0;
- count = 0;
-
- while (ch = buffer[count])
- {
- putDebugChar (ch);
- checksum += ch;
- count += 1;
- }
-
- putDebugChar('#');
- putDebugChar(hexchars[checksum >> 4]);
- putDebugChar(hexchars[checksum & 0xf]);
-
- }
- while (getDebugChar() != '+');
-}
-
-/* Indicate to caller of mem2hex or hex2mem that there has been an
- error. */
-static volatile int mem_err = 0;
-
-/* Convert the memory pointed to by mem into hex, placing result in buf.
- * Return a pointer to the last char put in buf (null), in case of mem fault,
- * return 0.
- * If MAY_FAULT is non-zero, then we will handle memory faults by returning
- * a 0, else treat a fault like any other fault in the stub.
- */
-
-static unsigned char *
-mem2hex(mem, buf, count, may_fault)
- unsigned char *mem;
- unsigned char *buf;
- int count;
- int may_fault;
-{
- unsigned char ch;
-
- set_mem_fault_trap(may_fault);
-
- while (count-- > 0)
- {
- ch = *mem++;
- if (mem_err)
- return 0;
- *buf++ = hexchars[ch >> 4];
- *buf++ = hexchars[ch & 0xf];
- }
-
- *buf = 0;
-
- set_mem_fault_trap(0);
-
- return buf;
-}
-
-/* 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 */
-
-static char *
-hex2mem(buf, mem, count, may_fault)
- unsigned char *buf;
- unsigned char *mem;
- int count;
- int may_fault;
-{
- int i;
- unsigned char ch;
-
- set_mem_fault_trap(may_fault);
-
- for (i=0; i<count; i++)
- {
- ch = hex(*buf++) << 4;
- ch |= hex(*buf++);
- *mem++ = ch;
- if (mem_err)
- return 0;
- }
-
- set_mem_fault_trap(0);
-
- return mem;
-}
-
-/* This table contains the mapping between SPARC hardware trap types, and
- signals, which are primarily what GDB understands. It also indicates
- which hardware traps we need to commandeer when initializing the stub. */
-
-static struct hard_trap_info
-{
- unsigned char tt; /* Trap type code for SPARClite */
- unsigned char signo; /* Signal that we map this trap into */
-} hard_trap_info[] = {
- {0x01, SIGSEGV}, /* instruction access error */
- {0x02, SIGILL}, /* privileged instruction */
- {0x03, SIGILL}, /* illegal instruction */
- {0x04, SIGEMT}, /* fp disabled */
- {0x07, SIGBUS}, /* mem address not aligned */
- {0x09, SIGSEGV}, /* data access exception */
- {0x0a, SIGEMT}, /* tag overflow */
- {0x20, SIGBUS}, /* r register access error */
- {0x21, SIGBUS}, /* instruction access error */
- {0x24, SIGEMT}, /* cp disabled */
- {0x29, SIGBUS}, /* data access error */
- {0x2a, SIGFPE}, /* divide by zero */
- {0x2b, SIGBUS}, /* data store error */
- {0x80+1, SIGTRAP}, /* ta 1 - normal breakpoint instruction */
- {0xff, SIGTRAP}, /* hardware breakpoint */
- {0, 0} /* Must be last */
-};
-
-/* Set up exception handlers for tracing and breakpoints */
-
-void
-set_debug_traps()
-{
- struct hard_trap_info *ht;
-
-/* Only setup fp traps if the FP is disabled. */
-
- for (ht = hard_trap_info;
- ht->tt != 0 && ht->signo != 0;
- ht++)
- if (ht->tt != 4 || ! (read_psr () & 0x1000))
- exceptionHandler(ht->tt, trap_low);
-
- initialized = 1;
-}
-
-asm ("
-! Trap handler for memory errors. This just sets mem_err to be non-zero. It
-! assumes that %l1 is non-zero. This should be safe, as it is doubtful that
-! 0 would ever contain code that could mem fault. This routine will skip
-! past the faulting instruction after setting mem_err.
-
- .text
- .align 4
-
-_fltr_set_mem_err:
- sethi %hi(_mem_err), %l0
- st %l1, [%l0 + %lo(_mem_err)]
- jmpl %l2, %g0
- rett %l2+4
-");
-
-static void
-set_mem_fault_trap(enable)
- int enable;
-{
- extern void fltr_set_mem_err();
- mem_err = 0;
-
- if (enable)
- exceptionHandler(9, fltr_set_mem_err);
- else
- exceptionHandler(9, trap_low);
-}
-
-asm ("
- .text
- .align 4
-
-_dummy_hw_breakpoint:
- jmpl %l2, %g0
- rett %l2+4
- nop
- nop
-");
-
-static void
-get_in_break_mode()
-{
- extern void dummy_hw_breakpoint();
-
- exceptionHandler (255, dummy_hw_breakpoint);
-
- asm ("ta 255");
-
- exceptionHandler (255, trap_low);
-}
-
-/* Convert the SPARC hardware trap type code to a unix signal number. */
-
-static int
-computeSignal(tt)
- int tt;
-{
- struct hard_trap_info *ht;
-
- for (ht = hard_trap_info; ht->tt && ht->signo; ht++)
- if (ht->tt == tt)
- return ht->signo;
-
- return SIGHUP; /* default for things we don't know about */
-}
-
-/*
- * While we find nice hex chars, build an int.
- * Return number of chars processed.
- */
-
-static int
-hexToInt(char **ptr, int *intValue)
-{
- int numChars = 0;
- int hexValue;
-
- *intValue = 0;
-
- while (**ptr)
- {
- hexValue = hex(**ptr);
- if (hexValue < 0)
- break;
-
- *intValue = (*intValue << 4) | hexValue;
- numChars ++;
-
- (*ptr)++;
- }
-
- return (numChars);
-}
-
-/*
- * This function does all command procesing for interfacing to gdb. It
- * returns 1 if you should skip the instruction at the trap address, 0
- * otherwise.
- */
-
-static void
-handle_exception (registers)
- unsigned long *registers;
-{
- int tt; /* Trap type */
- int sigval;
- int addr;
- int length;
- char *ptr;
- unsigned long *sp;
- unsigned long dsr;
-
-/* First, we must force all of the windows to be spilled out */
-
- asm(" save %sp, -64, %sp
- save %sp, -64, %sp
- save %sp, -64, %sp
- save %sp, -64, %sp
- save %sp, -64, %sp
- save %sp, -64, %sp
- save %sp, -64, %sp
- save %sp, -64, %sp
- restore
- restore
- restore
- restore
- restore
- restore
- restore
- restore
-");
-
- get_in_break_mode (); /* Enable DSU register writes */
-
- registers[DIA1] = read_asi (1, 0xff00);
- registers[DIA2] = read_asi (1, 0xff04);
- registers[DDA1] = read_asi (1, 0xff08);
- registers[DDA2] = read_asi (1, 0xff0c);
- registers[DDV1] = read_asi (1, 0xff10);
- registers[DDV2] = read_asi (1, 0xff14);
- registers[DCR] = read_asi (1, 0xff18);
- registers[DSR] = read_asi (1, 0xff1c);
-
- if (registers[PC] == (unsigned long)breakinst)
- {
- registers[PC] = registers[NPC];
- registers[NPC] += 4;
- }
- sp = (unsigned long *)registers[SP];
-
- dsr = (unsigned long)registers[DSR];
- if (dsr & 0x3c)
- tt = 255;
- else
- tt = (registers[TBR] >> 4) & 0xff;
-
- /* reply to host that an exception has occurred */
- sigval = computeSignal(tt);
- ptr = remcomOutBuffer;
-
- *ptr++ = 'T';
- *ptr++ = hexchars[sigval >> 4];
- *ptr++ = hexchars[sigval & 0xf];
-
- *ptr++ = hexchars[PC >> 4];
- *ptr++ = hexchars[PC & 0xf];
- *ptr++ = ':';
- ptr = mem2hex((char *)®isters[PC], ptr, 4, 0);
- *ptr++ = ';';
-
- *ptr++ = hexchars[FP >> 4];
- *ptr++ = hexchars[FP & 0xf];
- *ptr++ = ':';
- ptr = mem2hex(sp + 8 + 6, ptr, 4, 0); /* FP */
- *ptr++ = ';';
-
- *ptr++ = hexchars[SP >> 4];
- *ptr++ = hexchars[SP & 0xf];
- *ptr++ = ':';
- ptr = mem2hex((char *)&sp, ptr, 4, 0);
- *ptr++ = ';';
-
- *ptr++ = hexchars[NPC >> 4];
- *ptr++ = hexchars[NPC & 0xf];
- *ptr++ = ':';
- ptr = mem2hex((char *)®isters[NPC], ptr, 4, 0);
- *ptr++ = ';';
-
- *ptr++ = hexchars[O7 >> 4];
- *ptr++ = hexchars[O7 & 0xf];
- *ptr++ = ':';
- ptr = mem2hex((char *)®isters[O7], ptr, 4, 0);
- *ptr++ = ';';
-
- *ptr++ = 0;
-
- putpacket(remcomOutBuffer);
-
- while (1)
- {
- remcomOutBuffer[0] = 0;
-
- ptr = getpacket();
- switch (*ptr++)
- {
- case '?':
- remcomOutBuffer[0] = 'S';
- remcomOutBuffer[1] = hexchars[sigval >> 4];
- remcomOutBuffer[2] = hexchars[sigval & 0xf];
- remcomOutBuffer[3] = 0;
- break;
-
- case 'd':
- /* toggle debug flag */
- break;
-
- case 'g': /* return the value of the CPU registers */
- memcpy (®isters[L0], sp, 16 * 4); /* Copy L & I regs from stack */
- mem2hex ((char *)registers, remcomOutBuffer, NUMREGBYTES, 0);
- break;
-
- case 'G': /* Set the value of all registers */
- case 'P': /* Set the value of one register */
- {
- unsigned long *newsp, psr;
-
- psr = registers[PSR];
-
- if (ptr[-1] == 'P')
- {
- int regno;
-
- if (hexToInt (&ptr, ®no)
- && *ptr++ == '=')
- if (regno >= L0 && regno <= I7)
- hex2mem (ptr, sp + regno - L0, 4, 0);
- else
- hex2mem (ptr, (char *)®isters[regno], 4, 0);
- else
- {
- strcpy (remcomOutBuffer, "E01");
- break;
- }
- }
- else
- {
- hex2mem (ptr, (char *)registers, NUMREGBYTES, 0);
- memcpy (sp, ®isters[L0], 16 * 4); /* Copy L & I regs to stack */
- }
-
- /* See if the stack pointer has moved. If so, then copy the saved
- locals and ins to the new location. This keeps the window
- overflow and underflow routines happy. */
-
- newsp = (unsigned long *)registers[SP];
- if (sp != newsp)
- sp = memcpy(newsp, sp, 16 * 4);
-
- /* Don't allow CWP to be modified. */
-
- if (psr != registers[PSR])
- registers[PSR] = (psr & 0x1f) | (registers[PSR] & ~0x1f);
-
- strcpy(remcomOutBuffer,"OK");
- }
- break;
-
- case 'm': /* mAA..AA,LLLL Read LLLL bytes at address AA..AA */
- /* Try to read %x,%x. */
-
- if (hexToInt(&ptr, &addr)
- && *ptr++ == ','
- && hexToInt(&ptr, &length))
- {
- if (mem2hex((char *)addr, remcomOutBuffer, length, 1))
- break;
-
- strcpy (remcomOutBuffer, "E03");
- }
- else
- strcpy(remcomOutBuffer,"E01");
- break;
-
- case 'M': /* MAA..AA,LLLL: Write LLLL bytes at address AA.AA return OK */
- /* Try to read '%x,%x:'. */
-
- if (hexToInt(&ptr, &addr)
- && *ptr++ == ','
- && hexToInt(&ptr, &length)
- && *ptr++ == ':')
- {
- if (hex2mem(ptr, (char *)addr, length, 1))
- strcpy(remcomOutBuffer, "OK");
- else
- strcpy(remcomOutBuffer, "E03");
- }
- else
- strcpy(remcomOutBuffer, "E02");
- break;
-
- case 'c': /* cAA..AA Continue at address AA..AA(optional) */
- /* try to read optional parameter, pc unchanged if no parm */
- if (hexToInt(&ptr, &addr))
- {
- registers[PC] = addr;
- registers[NPC] = addr + 4;
- }
-
-/* Need to flush the instruction cache here, as we may have deposited a
- breakpoint, and the icache probably has no way of knowing that a data ref to
- some location may have changed something that is in the instruction cache.
- */
-
- flush_i_cache ();
-
- if (!(registers[DSR] & 0x1) /* DSU enabled? */
- && !(registers[DCR] & 0x200)) /* Are we in break state? */
- { /* Yes, set the DSU regs */
- write_asi (1, 0xff00, registers[DIA1]);
- write_asi (1, 0xff04, registers[DIA2]);
- write_asi (1, 0xff08, registers[DDA1]);
- write_asi (1, 0xff0c, registers[DDA2]);
- write_asi (1, 0xff10, registers[DDV1]);
- write_asi (1, 0xff14, registers[DDV2]);
- write_asi (1, 0xff1c, registers[DSR]);
- write_asi (1, 0xff18, registers[DCR] | 0x200); /* Clear break */
- }
-
- return;
-
- /* kill the program */
- case 'k' : /* do nothing */
- break;
-#if 0
- case 't': /* Test feature */
- asm (" std %f30,[%sp]");
- break;
-#endif
- case 'r': /* Reset */
- asm ("call 0
- nop ");
- break;
- } /* switch */
-
- /* reply to the request */
- putpacket(remcomOutBuffer);
- }
-}
-
-/* This function will generate a breakpoint exception. It is used at the
- beginning of a program to sync up with a debugger and can be used
- otherwise as a quick means to stop program execution and "break" into
- the debugger. */
-
-void
-breakpoint()
-{
- if (!initialized)
- return;
-
- asm(" .globl _breakinst
-
- _breakinst: ta 1
- ");
-}
+// 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 SPARC by Stu Grossman, Cygnus Support.
+// OBSOLETE * Based on sparc-stub.c, it's modified for SPARClite Debug Unit hardware
+// OBSOLETE * breakpoint support to create sparclite-stub.c, by Kung Hsu, Cygnus Support.
+// OBSOLETE *
+// OBSOLETE * This code has been extensively tested on the Fujitsu SPARClite demo board.
+// 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 *************
+// 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 * P set the value of a single CPU register 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 *
+// 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 #include <string.h>
+// OBSOLETE #include <signal.h>
+// OBSOLETE #include <sparclite.h>
+// OBSOLETE
+// OBSOLETE /************************************************************************
+// OBSOLETE *
+// OBSOLETE * external low-level support routines
+// OBSOLETE */
+// OBSOLETE
+// OBSOLETE extern void putDebugChar (int c); /* write a single character */
+// OBSOLETE extern int getDebugChar (void); /* read and return a single char */
+// 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 #define BUFMAX 2048
+// OBSOLETE
+// OBSOLETE static int initialized = 0; /* !0 means we've been initialized */
+// OBSOLETE
+// OBSOLETE extern void breakinst ();
+// OBSOLETE static void set_mem_fault_trap (int enable);
+// OBSOLETE static void get_in_break_mode (void);
+// OBSOLETE
+// OBSOLETE static const char hexchars[]="0123456789abcdef";
+// OBSOLETE
+// OBSOLETE #define NUMREGS 80
+// OBSOLETE
+// OBSOLETE /* Number of bytes of registers. */
+// OBSOLETE #define NUMREGBYTES (NUMREGS * 4)
+// OBSOLETE enum regnames {G0, G1, G2, G3, G4, G5, G6, G7,
+// OBSOLETE O0, O1, O2, O3, O4, O5, SP, O7,
+// OBSOLETE L0, L1, L2, L3, L4, L5, L6, L7,
+// OBSOLETE I0, I1, I2, I3, I4, I5, FP, I7,
+// OBSOLETE
+// OBSOLETE F0, F1, F2, F3, F4, F5, F6, F7,
+// OBSOLETE F8, F9, F10, F11, F12, F13, F14, F15,
+// OBSOLETE F16, F17, F18, F19, F20, F21, F22, F23,
+// OBSOLETE F24, F25, F26, F27, F28, F29, F30, F31,
+// OBSOLETE Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR,
+// OBSOLETE DIA1, DIA2, DDA1, DDA2, DDV1, DDV2, DCR, DSR };
+// OBSOLETE
+// OBSOLETE /*************************** ASSEMBLY CODE MACROS *************************/
+// OBSOLETE /* */
+// OBSOLETE
+// OBSOLETE extern void trap_low();
+// OBSOLETE
+// OBSOLETE /* Create private copies of common functions used by the stub. This prevents
+// OBSOLETE nasty interactions between app code and the stub (for instance if user steps
+// OBSOLETE into strlen, etc..) */
+// OBSOLETE
+// OBSOLETE static char *
+// OBSOLETE strcpy (char *dst, const char *src)
+// OBSOLETE {
+// OBSOLETE char *retval = dst;
+// OBSOLETE
+// OBSOLETE while ((*dst++ = *src++) != '\000');
+// OBSOLETE
+// OBSOLETE return retval;
+// OBSOLETE }
+// OBSOLETE
+// OBSOLETE static void *
+// OBSOLETE memcpy (void *vdst, const void *vsrc, int n)
+// OBSOLETE {
+// OBSOLETE char *dst = vdst;
+// OBSOLETE const char *src = vsrc;
+// OBSOLETE char *retval = dst;
+// OBSOLETE
+// OBSOLETE while (n-- > 0)
+// OBSOLETE *dst++ = *src++;
+// OBSOLETE
+// OBSOLETE return retval;
+// OBSOLETE }
+// OBSOLETE
+// OBSOLETE asm("
+// OBSOLETE .reserve trapstack, 1000 * 4, \"bss\", 8
+// OBSOLETE
+// OBSOLETE .data
+// OBSOLETE .align 4
+// OBSOLETE
+// OBSOLETE in_trap_handler:
+// OBSOLETE .word 0
+// OBSOLETE
+// OBSOLETE .text
+// OBSOLETE .align 4
+// OBSOLETE
+// OBSOLETE ! This function is called when any SPARC trap (except window overflow or
+// OBSOLETE ! underflow) occurs. It makes sure that the invalid register window is still
+// OBSOLETE ! available before jumping into C code. It will also restore the world if you
+// OBSOLETE ! return from handle_exception.
+// OBSOLETE !
+// OBSOLETE ! On entry, trap_low expects l1 and l2 to contain pc and npc respectivly.
+// OBSOLETE ! Register usage throughout the routine is as follows:
+// OBSOLETE !
+// OBSOLETE ! l0 - psr
+// OBSOLETE ! l1 - pc
+// OBSOLETE ! l2 - npc
+// OBSOLETE ! l3 - wim
+// OBSOLETE ! l4 - scratch and y reg
+// OBSOLETE ! l5 - scratch and tbr
+// OBSOLETE ! l6 - unused
+// OBSOLETE ! l7 - unused
+// OBSOLETE
+// OBSOLETE .globl _trap_low
+// OBSOLETE _trap_low:
+// OBSOLETE mov %psr, %l0
+// OBSOLETE mov %wim, %l3
+// OBSOLETE
+// OBSOLETE srl %l3, %l0, %l4 ! wim >> cwp
+// OBSOLETE cmp %l4, 1
+// OBSOLETE bne window_fine ! Branch if not in the invalid window
+// OBSOLETE nop
+// OBSOLETE
+// OBSOLETE ! Handle window overflow
+// OBSOLETE
+// OBSOLETE mov %g1, %l4 ! Save g1, we use it to hold the wim
+// OBSOLETE srl %l3, 1, %g1 ! Rotate wim right
+// OBSOLETE tst %g1
+// OBSOLETE bg good_wim ! Branch if new wim is non-zero
+// OBSOLETE nop
+// OBSOLETE
+// OBSOLETE ! At this point, we need to bring a 1 into the high order bit of the wim.
+// OBSOLETE ! Since we don't want to make any assumptions about the number of register
+// OBSOLETE ! windows, we figure it out dynamically so as to setup the wim correctly.
+// OBSOLETE
+// OBSOLETE not %g1 ! Fill g1 with ones
+// OBSOLETE mov %g1, %wim ! Fill the wim with ones
+// OBSOLETE nop
+// OBSOLETE nop
+// OBSOLETE nop
+// OBSOLETE mov %wim, %g1 ! Read back the wim
+// OBSOLETE inc %g1 ! Now g1 has 1 just to left of wim
+// OBSOLETE srl %g1, 1, %g1 ! Now put 1 at top of wim
+// OBSOLETE mov %g0, %wim ! Clear wim so that subsequent save
+// OBSOLETE nop ! won't trap
+// OBSOLETE nop
+// OBSOLETE nop
+// OBSOLETE
+// OBSOLETE good_wim:
+// OBSOLETE save %g0, %g0, %g0 ! Slip into next window
+// OBSOLETE mov %g1, %wim ! Install the new wim
+// OBSOLETE
+// OBSOLETE std %l0, [%sp + 0 * 4] ! save L & I registers
+// OBSOLETE std %l2, [%sp + 2 * 4]
+// OBSOLETE std %l4, [%sp + 4 * 4]
+// OBSOLETE std %l6, [%sp + 6 * 4]
+// OBSOLETE
+// OBSOLETE std %i0, [%sp + 8 * 4]
+// OBSOLETE std %i2, [%sp + 10 * 4]
+// OBSOLETE std %i4, [%sp + 12 * 4]
+// OBSOLETE std %i6, [%sp + 14 * 4]
+// OBSOLETE
+// OBSOLETE restore ! Go back to trap window.
+// OBSOLETE mov %l4, %g1 ! Restore %g1
+// OBSOLETE
+// OBSOLETE window_fine:
+// OBSOLETE sethi %hi(in_trap_handler), %l4
+// OBSOLETE ld [%lo(in_trap_handler) + %l4], %l5
+// OBSOLETE tst %l5
+// OBSOLETE bg recursive_trap
+// OBSOLETE inc %l5
+// OBSOLETE
+// OBSOLETE set trapstack+1000*4, %sp ! Switch to trap stack
+// OBSOLETE
+// OBSOLETE recursive_trap:
+// OBSOLETE st %l5, [%lo(in_trap_handler) + %l4]
+// OBSOLETE sub %sp,(16+1+6+1+80)*4,%sp ! Make room for input & locals
+// OBSOLETE ! + hidden arg + arg spill
+// OBSOLETE ! + doubleword alignment
+// OBSOLETE ! + registers[72] local var
+// OBSOLETE
+// OBSOLETE std %g0, [%sp + (24 + 0) * 4] ! registers[Gx]
+// OBSOLETE std %g2, [%sp + (24 + 2) * 4]
+// OBSOLETE std %g4, [%sp + (24 + 4) * 4]
+// OBSOLETE std %g6, [%sp + (24 + 6) * 4]
+// OBSOLETE
+// OBSOLETE std %i0, [%sp + (24 + 8) * 4] ! registers[Ox]
+// OBSOLETE std %i2, [%sp + (24 + 10) * 4]
+// OBSOLETE std %i4, [%sp + (24 + 12) * 4]
+// OBSOLETE std %i6, [%sp + (24 + 14) * 4]
+// OBSOLETE
+// OBSOLETE mov %y, %l4
+// OBSOLETE mov %tbr, %l5
+// OBSOLETE st %l4, [%sp + (24 + 64) * 4] ! Y
+// OBSOLETE st %l0, [%sp + (24 + 65) * 4] ! PSR
+// OBSOLETE st %l3, [%sp + (24 + 66) * 4] ! WIM
+// OBSOLETE st %l5, [%sp + (24 + 67) * 4] ! TBR
+// OBSOLETE st %l1, [%sp + (24 + 68) * 4] ! PC
+// OBSOLETE st %l2, [%sp + (24 + 69) * 4] ! NPC
+// OBSOLETE
+// OBSOLETE or %l0, 0xf20, %l4
+// OBSOLETE mov %l4, %psr ! Turn on traps, disable interrupts
+// OBSOLETE
+// OBSOLETE set 0x1000, %l1
+// OBSOLETE btst %l1, %l0 ! FP enabled?
+// OBSOLETE be no_fpstore
+// OBSOLETE nop
+// OBSOLETE
+// OBSOLETE ! Must save fsr first, to flush the FQ. This may cause a deferred fp trap, so
+// OBSOLETE ! traps must be enabled to allow the trap handler to clean things up.
+// OBSOLETE
+// OBSOLETE st %fsr, [%sp + (24 + 70) * 4]
+// OBSOLETE
+// OBSOLETE std %f0, [%sp + (24 + 32) * 4]
+// OBSOLETE std %f2, [%sp + (24 + 34) * 4]
+// OBSOLETE std %f4, [%sp + (24 + 36) * 4]
+// OBSOLETE std %f6, [%sp + (24 + 38) * 4]
+// OBSOLETE std %f8, [%sp + (24 + 40) * 4]
+// OBSOLETE std %f10, [%sp + (24 + 42) * 4]
+// OBSOLETE std %f12, [%sp + (24 + 44) * 4]
+// OBSOLETE std %f14, [%sp + (24 + 46) * 4]
+// OBSOLETE std %f16, [%sp + (24 + 48) * 4]
+// OBSOLETE std %f18, [%sp + (24 + 50) * 4]
+// OBSOLETE std %f20, [%sp + (24 + 52) * 4]
+// OBSOLETE std %f22, [%sp + (24 + 54) * 4]
+// OBSOLETE std %f24, [%sp + (24 + 56) * 4]
+// OBSOLETE std %f26, [%sp + (24 + 58) * 4]
+// OBSOLETE std %f28, [%sp + (24 + 60) * 4]
+// OBSOLETE std %f30, [%sp + (24 + 62) * 4]
+// OBSOLETE no_fpstore:
+// OBSOLETE
+// OBSOLETE call _handle_exception
+// OBSOLETE add %sp, 24 * 4, %o0 ! Pass address of registers
+// OBSOLETE
+// OBSOLETE ! Reload all of the registers that aren't on the stack
+// OBSOLETE
+// OBSOLETE ld [%sp + (24 + 1) * 4], %g1 ! registers[Gx]
+// OBSOLETE ldd [%sp + (24 + 2) * 4], %g2
+// OBSOLETE ldd [%sp + (24 + 4) * 4], %g4
+// OBSOLETE ldd [%sp + (24 + 6) * 4], %g6
+// OBSOLETE
+// OBSOLETE ldd [%sp + (24 + 8) * 4], %i0 ! registers[Ox]
+// OBSOLETE ldd [%sp + (24 + 10) * 4], %i2
+// OBSOLETE ldd [%sp + (24 + 12) * 4], %i4
+// OBSOLETE ldd [%sp + (24 + 14) * 4], %i6
+// OBSOLETE
+// OBSOLETE
+// OBSOLETE ldd [%sp + (24 + 64) * 4], %l0 ! Y & PSR
+// OBSOLETE ldd [%sp + (24 + 68) * 4], %l2 ! PC & NPC
+// OBSOLETE
+// OBSOLETE set 0x1000, %l5
+// OBSOLETE btst %l5, %l1 ! FP enabled?
+// OBSOLETE be no_fpreload
+// OBSOLETE nop
+// OBSOLETE
+// OBSOLETE ldd [%sp + (24 + 32) * 4], %f0
+// OBSOLETE ldd [%sp + (24 + 34) * 4], %f2
+// OBSOLETE ldd [%sp + (24 + 36) * 4], %f4
+// OBSOLETE ldd [%sp + (24 + 38) * 4], %f6
+// OBSOLETE ldd [%sp + (24 + 40) * 4], %f8
+// OBSOLETE ldd [%sp + (24 + 42) * 4], %f10
+// OBSOLETE ldd [%sp + (24 + 44) * 4], %f12
+// OBSOLETE ldd [%sp + (24 + 46) * 4], %f14
+// OBSOLETE ldd [%sp + (24 + 48) * 4], %f16
+// OBSOLETE ldd [%sp + (24 + 50) * 4], %f18
+// OBSOLETE ldd [%sp + (24 + 52) * 4], %f20
+// OBSOLETE ldd [%sp + (24 + 54) * 4], %f22
+// OBSOLETE ldd [%sp + (24 + 56) * 4], %f24
+// OBSOLETE ldd [%sp + (24 + 58) * 4], %f26
+// OBSOLETE ldd [%sp + (24 + 60) * 4], %f28
+// OBSOLETE ldd [%sp + (24 + 62) * 4], %f30
+// OBSOLETE
+// OBSOLETE ld [%sp + (24 + 70) * 4], %fsr
+// OBSOLETE no_fpreload:
+// OBSOLETE
+// OBSOLETE restore ! Ensure that previous window is valid
+// OBSOLETE save %g0, %g0, %g0 ! by causing a window_underflow trap
+// OBSOLETE
+// OBSOLETE mov %l0, %y
+// OBSOLETE mov %l1, %psr ! Make sure that traps are disabled
+// OBSOLETE ! for rett
+// OBSOLETE sethi %hi(in_trap_handler), %l4
+// OBSOLETE ld [%lo(in_trap_handler) + %l4], %l5
+// OBSOLETE dec %l5
+// OBSOLETE st %l5, [%lo(in_trap_handler) + %l4]
+// OBSOLETE
+// OBSOLETE jmpl %l2, %g0 ! Restore old PC
+// OBSOLETE rett %l3 ! Restore old nPC
+// OBSOLETE ");
+// OBSOLETE
+// OBSOLETE /* Convert ch from a hex digit to an int */
+// OBSOLETE
+// OBSOLETE static int
+// OBSOLETE hex (unsigned char ch)
+// OBSOLETE {
+// OBSOLETE if (ch >= 'a' && ch <= 'f')
+// OBSOLETE return ch-'a'+10;
+// OBSOLETE if (ch >= '0' && ch <= '9')
+// OBSOLETE return ch-'0';
+// OBSOLETE if (ch >= 'A' && ch <= 'F')
+// OBSOLETE return ch-'A'+10;
+// OBSOLETE return -1;
+// OBSOLETE }
+// OBSOLETE
+// OBSOLETE static char remcomInBuffer[BUFMAX];
+// OBSOLETE static char remcomOutBuffer[BUFMAX];
+// 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 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 unsigned char ch;
+// OBSOLETE
+// OBSOLETE /* $<packet info>#<checksum>. */
+// OBSOLETE do
+// OBSOLETE {
+// OBSOLETE putDebugChar('$');
+// OBSOLETE checksum = 0;
+// OBSOLETE count = 0;
+// OBSOLETE
+// OBSOLETE while (ch = buffer[count])
+// OBSOLETE {
+// OBSOLETE putDebugChar (ch);
+// OBSOLETE checksum += ch;
+// OBSOLETE count += 1;
+// OBSOLETE }
+// OBSOLETE
+// OBSOLETE putDebugChar('#');
+// OBSOLETE putDebugChar(hexchars[checksum >> 4]);
+// OBSOLETE putDebugChar(hexchars[checksum & 0xf]);
+// OBSOLETE
+// OBSOLETE }
+// OBSOLETE while (getDebugChar() != '+');
+// OBSOLETE }
+// OBSOLETE
+// OBSOLETE /* Indicate to caller of mem2hex or hex2mem that there has been an
+// OBSOLETE error. */
+// OBSOLETE static volatile int mem_err = 0;
+// 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), in case of mem fault,
+// OBSOLETE * return 0.
+// OBSOLETE * If MAY_FAULT is non-zero, then we will handle memory faults by returning
+// OBSOLETE * a 0, else treat a fault like any other fault in the stub.
+// OBSOLETE */
+// OBSOLETE
+// OBSOLETE static unsigned char *
+// OBSOLETE mem2hex (unsigned char *mem, unsigned char *buf, int count, int may_fault)
+// OBSOLETE {
+// OBSOLETE unsigned char ch;
+// OBSOLETE
+// OBSOLETE set_mem_fault_trap(may_fault);
+// OBSOLETE
+// OBSOLETE while (count-- > 0)
+// OBSOLETE {
+// OBSOLETE ch = *mem++;
+// OBSOLETE if (mem_err)
+// OBSOLETE return 0;
+// OBSOLETE *buf++ = hexchars[ch >> 4];
+// OBSOLETE *buf++ = hexchars[ch & 0xf];
+// OBSOLETE }
+// OBSOLETE
+// OBSOLETE *buf = 0;
+// OBSOLETE
+// OBSOLETE set_mem_fault_trap(0);
+// OBSOLETE
+// 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 char *
+// OBSOLETE hex2mem (unsigned char *buf, unsigned char *mem, int count, int may_fault)
+// OBSOLETE {
+// OBSOLETE int i;
+// OBSOLETE unsigned char ch;
+// OBSOLETE
+// OBSOLETE set_mem_fault_trap(may_fault);
+// OBSOLETE
+// OBSOLETE for (i=0; i<count; i++)
+// OBSOLETE {
+// OBSOLETE ch = hex(*buf++) << 4;
+// OBSOLETE ch |= hex(*buf++);
+// OBSOLETE *mem++ = ch;
+// OBSOLETE if (mem_err)
+// OBSOLETE return 0;
+// OBSOLETE }
+// OBSOLETE
+// OBSOLETE set_mem_fault_trap(0);
+// OBSOLETE
+// OBSOLETE return mem;
+// OBSOLETE }
+// OBSOLETE
+// OBSOLETE /* This table contains the mapping between SPARC hardware trap types, and
+// OBSOLETE signals, which are primarily what GDB understands. It also indicates
+// OBSOLETE which hardware traps we need to commandeer when initializing the stub. */
+// OBSOLETE
+// OBSOLETE static struct hard_trap_info
+// OBSOLETE {
+// OBSOLETE unsigned char tt; /* Trap type code for SPARClite */
+// OBSOLETE unsigned char signo; /* Signal that we map this trap into */
+// OBSOLETE } hard_trap_info[] = {
+// OBSOLETE {0x01, SIGSEGV}, /* instruction access error */
+// OBSOLETE {0x02, SIGILL}, /* privileged instruction */
+// OBSOLETE {0x03, SIGILL}, /* illegal instruction */
+// OBSOLETE {0x04, SIGEMT}, /* fp disabled */
+// OBSOLETE {0x07, SIGBUS}, /* mem address not aligned */
+// OBSOLETE {0x09, SIGSEGV}, /* data access exception */
+// OBSOLETE {0x0a, SIGEMT}, /* tag overflow */
+// OBSOLETE {0x20, SIGBUS}, /* r register access error */
+// OBSOLETE {0x21, SIGBUS}, /* instruction access error */
+// OBSOLETE {0x24, SIGEMT}, /* cp disabled */
+// OBSOLETE {0x29, SIGBUS}, /* data access error */
+// OBSOLETE {0x2a, SIGFPE}, /* divide by zero */
+// OBSOLETE {0x2b, SIGBUS}, /* data store error */
+// OBSOLETE {0x80+1, SIGTRAP}, /* ta 1 - normal breakpoint instruction */
+// OBSOLETE {0xff, SIGTRAP}, /* hardware breakpoint */
+// OBSOLETE {0, 0} /* Must be last */
+// OBSOLETE };
+// OBSOLETE
+// OBSOLETE /* Set up exception handlers for tracing and breakpoints */
+// OBSOLETE
+// OBSOLETE void
+// OBSOLETE set_debug_traps (void)
+// OBSOLETE {
+// OBSOLETE struct hard_trap_info *ht;
+// OBSOLETE
+// OBSOLETE /* Only setup fp traps if the FP is disabled. */
+// OBSOLETE
+// OBSOLETE for (ht = hard_trap_info;
+// OBSOLETE ht->tt != 0 && ht->signo != 0;
+// OBSOLETE ht++)
+// OBSOLETE if (ht->tt != 4 || ! (read_psr () & 0x1000))
+// OBSOLETE exceptionHandler(ht->tt, trap_low);
+// OBSOLETE
+// OBSOLETE initialized = 1;
+// OBSOLETE }
+// OBSOLETE
+// OBSOLETE asm ("
+// OBSOLETE ! Trap handler for memory errors. This just sets mem_err to be non-zero. It
+// OBSOLETE ! assumes that %l1 is non-zero. This should be safe, as it is doubtful that
+// OBSOLETE ! 0 would ever contain code that could mem fault. This routine will skip
+// OBSOLETE ! past the faulting instruction after setting mem_err.
+// OBSOLETE
+// OBSOLETE .text
+// OBSOLETE .align 4
+// OBSOLETE
+// OBSOLETE _fltr_set_mem_err:
+// OBSOLETE sethi %hi(_mem_err), %l0
+// OBSOLETE st %l1, [%l0 + %lo(_mem_err)]
+// OBSOLETE jmpl %l2, %g0
+// OBSOLETE rett %l2+4
+// OBSOLETE ");
+// OBSOLETE
+// OBSOLETE static void
+// OBSOLETE set_mem_fault_trap (int enable)
+// OBSOLETE {
+// OBSOLETE extern void fltr_set_mem_err();
+// OBSOLETE mem_err = 0;
+// OBSOLETE
+// OBSOLETE if (enable)
+// OBSOLETE exceptionHandler(9, fltr_set_mem_err);
+// OBSOLETE else
+// OBSOLETE exceptionHandler(9, trap_low);
+// OBSOLETE }
+// OBSOLETE
+// OBSOLETE asm ("
+// OBSOLETE .text
+// OBSOLETE .align 4
+// OBSOLETE
+// OBSOLETE _dummy_hw_breakpoint:
+// OBSOLETE jmpl %l2, %g0
+// OBSOLETE rett %l2+4
+// OBSOLETE nop
+// OBSOLETE nop
+// OBSOLETE ");
+// OBSOLETE
+// OBSOLETE static void
+// OBSOLETE get_in_break_mode (void)
+// OBSOLETE {
+// OBSOLETE extern void dummy_hw_breakpoint();
+// OBSOLETE
+// OBSOLETE exceptionHandler (255, dummy_hw_breakpoint);
+// OBSOLETE
+// OBSOLETE asm ("ta 255");
+// OBSOLETE
+// OBSOLETE exceptionHandler (255, trap_low);
+// OBSOLETE }
+// OBSOLETE
+// OBSOLETE /* Convert the SPARC hardware trap type code to a unix signal number. */
+// OBSOLETE
+// OBSOLETE static int
+// OBSOLETE computeSignal (int tt)
+// OBSOLETE {
+// OBSOLETE struct hard_trap_info *ht;
+// OBSOLETE
+// OBSOLETE for (ht = hard_trap_info; ht->tt && ht->signo; ht++)
+// OBSOLETE if (ht->tt == tt)
+// OBSOLETE return ht->signo;
+// OBSOLETE
+// OBSOLETE return SIGHUP; /* default for things we don't know about */
+// OBSOLETE }
+// OBSOLETE
+// OBSOLETE /*
+// OBSOLETE * While we find nice hex chars, build an int.
+// OBSOLETE * Return number of chars processed.
+// OBSOLETE */
+// OBSOLETE
+// OBSOLETE static int
+// OBSOLETE hexToInt(char **ptr, int *intValue)
+// OBSOLETE {
+// OBSOLETE int numChars = 0;
+// OBSOLETE int hexValue;
+// OBSOLETE
+// OBSOLETE *intValue = 0;
+// OBSOLETE
+// OBSOLETE while (**ptr)
+// OBSOLETE {
+// OBSOLETE hexValue = hex(**ptr);
+// OBSOLETE if (hexValue < 0)
+// OBSOLETE break;
+// OBSOLETE
+// OBSOLETE *intValue = (*intValue << 4) | hexValue;
+// OBSOLETE numChars ++;
+// OBSOLETE
+// OBSOLETE (*ptr)++;
+// OBSOLETE }
+// OBSOLETE
+// OBSOLETE return (numChars);
+// OBSOLETE }
+// OBSOLETE
+// OBSOLETE /*
+// OBSOLETE * This function does all command procesing for interfacing to gdb. It
+// OBSOLETE * returns 1 if you should skip the instruction at the trap address, 0
+// OBSOLETE * otherwise.
+// OBSOLETE */
+// OBSOLETE
+// OBSOLETE static void
+// OBSOLETE handle_exception (unsigned long *registers)
+// OBSOLETE {
+// OBSOLETE int tt; /* Trap type */
+// OBSOLETE int sigval;
+// OBSOLETE int addr;
+// OBSOLETE int length;
+// OBSOLETE char *ptr;
+// OBSOLETE unsigned long *sp;
+// OBSOLETE unsigned long dsr;
+// OBSOLETE
+// OBSOLETE /* First, we must force all of the windows to be spilled out */
+// OBSOLETE
+// OBSOLETE asm(" save %sp, -64, %sp
+// OBSOLETE save %sp, -64, %sp
+// OBSOLETE save %sp, -64, %sp
+// OBSOLETE save %sp, -64, %sp
+// OBSOLETE save %sp, -64, %sp
+// OBSOLETE save %sp, -64, %sp
+// OBSOLETE save %sp, -64, %sp
+// OBSOLETE save %sp, -64, %sp
+// OBSOLETE restore
+// OBSOLETE restore
+// OBSOLETE restore
+// OBSOLETE restore
+// OBSOLETE restore
+// OBSOLETE restore
+// OBSOLETE restore
+// OBSOLETE restore
+// OBSOLETE ");
+// OBSOLETE
+// OBSOLETE get_in_break_mode (); /* Enable DSU register writes */
+// OBSOLETE
+// OBSOLETE registers[DIA1] = read_asi (1, 0xff00);
+// OBSOLETE registers[DIA2] = read_asi (1, 0xff04);
+// OBSOLETE registers[DDA1] = read_asi (1, 0xff08);
+// OBSOLETE registers[DDA2] = read_asi (1, 0xff0c);
+// OBSOLETE registers[DDV1] = read_asi (1, 0xff10);
+// OBSOLETE registers[DDV2] = read_asi (1, 0xff14);
+// OBSOLETE registers[DCR] = read_asi (1, 0xff18);
+// OBSOLETE registers[DSR] = read_asi (1, 0xff1c);
+// OBSOLETE
+// OBSOLETE if (registers[PC] == (unsigned long)breakinst)
+// OBSOLETE {
+// OBSOLETE registers[PC] = registers[NPC];
+// OBSOLETE registers[NPC] += 4;
+// OBSOLETE }
+// OBSOLETE sp = (unsigned long *)registers[SP];
+// OBSOLETE
+// OBSOLETE dsr = (unsigned long)registers[DSR];
+// OBSOLETE if (dsr & 0x3c)
+// OBSOLETE tt = 255;
+// OBSOLETE else
+// OBSOLETE tt = (registers[TBR] >> 4) & 0xff;
+// OBSOLETE
+// OBSOLETE /* reply to host that an exception has occurred */
+// OBSOLETE sigval = computeSignal(tt);
+// OBSOLETE ptr = remcomOutBuffer;
+// OBSOLETE
+// OBSOLETE *ptr++ = 'T';
+// 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((char *)®isters[PC], ptr, 4, 0);
+// OBSOLETE *ptr++ = ';';
+// OBSOLETE
+// OBSOLETE *ptr++ = hexchars[FP >> 4];
+// OBSOLETE *ptr++ = hexchars[FP & 0xf];
+// OBSOLETE *ptr++ = ':';
+// OBSOLETE ptr = mem2hex(sp + 8 + 6, ptr, 4, 0); /* FP */
+// OBSOLETE *ptr++ = ';';
+// OBSOLETE
+// OBSOLETE *ptr++ = hexchars[SP >> 4];
+// OBSOLETE *ptr++ = hexchars[SP & 0xf];
+// OBSOLETE *ptr++ = ':';
+// OBSOLETE ptr = mem2hex((char *)&sp, ptr, 4, 0);
+// OBSOLETE *ptr++ = ';';
+// OBSOLETE
+// OBSOLETE *ptr++ = hexchars[NPC >> 4];
+// OBSOLETE *ptr++ = hexchars[NPC & 0xf];
+// OBSOLETE *ptr++ = ':';
+// OBSOLETE ptr = mem2hex((char *)®isters[NPC], ptr, 4, 0);
+// OBSOLETE *ptr++ = ';';
+// OBSOLETE
+// OBSOLETE *ptr++ = hexchars[O7 >> 4];
+// OBSOLETE *ptr++ = hexchars[O7 & 0xf];
+// OBSOLETE *ptr++ = ':';
+// OBSOLETE ptr = mem2hex((char *)®isters[O7], ptr, 4, 0);
+// OBSOLETE *ptr++ = ';';
+// OBSOLETE
+// OBSOLETE *ptr++ = 0;
+// OBSOLETE
+// OBSOLETE putpacket(remcomOutBuffer);
+// OBSOLETE
+// OBSOLETE while (1)
+// OBSOLETE {
+// OBSOLETE remcomOutBuffer[0] = 0;
+// OBSOLETE
+// OBSOLETE ptr = getpacket();
+// OBSOLETE switch (*ptr++)
+// OBSOLETE {
+// OBSOLETE case '?':
+// OBSOLETE remcomOutBuffer[0] = 'S';
+// OBSOLETE remcomOutBuffer[1] = hexchars[sigval >> 4];
+// OBSOLETE remcomOutBuffer[2] = hexchars[sigval & 0xf];
+// OBSOLETE remcomOutBuffer[3] = 0;
+// OBSOLETE break;
+// OBSOLETE
+// OBSOLETE case 'd':
+// OBSOLETE /* toggle debug flag */
+// OBSOLETE break;
+// OBSOLETE
+// OBSOLETE case 'g': /* return the value of the CPU registers */
+// OBSOLETE memcpy (®isters[L0], sp, 16 * 4); /* Copy L & I regs from stack */
+// OBSOLETE mem2hex ((char *)registers, remcomOutBuffer, NUMREGBYTES, 0);
+// OBSOLETE break;
+// OBSOLETE
+// OBSOLETE case 'G': /* Set the value of all registers */
+// OBSOLETE case 'P': /* Set the value of one register */
+// OBSOLETE {
+// OBSOLETE unsigned long *newsp, psr;
+// OBSOLETE
+// OBSOLETE psr = registers[PSR];
+// OBSOLETE
+// OBSOLETE if (ptr[-1] == 'P')
+// OBSOLETE {
+// OBSOLETE int regno;
+// OBSOLETE
+// OBSOLETE if (hexToInt (&ptr, ®no)
+// OBSOLETE && *ptr++ == '=')
+// OBSOLETE if (regno >= L0 && regno <= I7)
+// OBSOLETE hex2mem (ptr, sp + regno - L0, 4, 0);
+// OBSOLETE else
+// OBSOLETE hex2mem (ptr, (char *)®isters[regno], 4, 0);
+// OBSOLETE else
+// OBSOLETE {
+// OBSOLETE strcpy (remcomOutBuffer, "E01");
+// OBSOLETE break;
+// OBSOLETE }
+// OBSOLETE }
+// OBSOLETE else
+// OBSOLETE {
+// OBSOLETE hex2mem (ptr, (char *)registers, NUMREGBYTES, 0);
+// OBSOLETE memcpy (sp, ®isters[L0], 16 * 4); /* Copy L & I regs to stack */
+// OBSOLETE }
+// OBSOLETE
+// OBSOLETE /* See if the stack pointer has moved. If so, then copy the saved
+// OBSOLETE locals and ins to the new location. This keeps the window
+// OBSOLETE overflow and underflow routines happy. */
+// OBSOLETE
+// OBSOLETE newsp = (unsigned long *)registers[SP];
+// OBSOLETE if (sp != newsp)
+// OBSOLETE sp = memcpy(newsp, sp, 16 * 4);
+// OBSOLETE
+// OBSOLETE /* Don't allow CWP to be modified. */
+// OBSOLETE
+// OBSOLETE if (psr != registers[PSR])
+// OBSOLETE registers[PSR] = (psr & 0x1f) | (registers[PSR] & ~0x1f);
+// OBSOLETE
+// OBSOLETE strcpy(remcomOutBuffer,"OK");
+// OBSOLETE }
+// OBSOLETE break;
+// OBSOLETE
+// OBSOLETE case 'm': /* mAA..AA,LLLL Read LLLL bytes at address AA..AA */
+// OBSOLETE /* Try to read %x,%x. */
+// OBSOLETE
+// OBSOLETE if (hexToInt(&ptr, &addr)
+// OBSOLETE && *ptr++ == ','
+// OBSOLETE && hexToInt(&ptr, &length))
+// OBSOLETE {
+// OBSOLETE if (mem2hex((char *)addr, remcomOutBuffer, length, 1))
+// OBSOLETE break;
+// OBSOLETE
+// OBSOLETE strcpy (remcomOutBuffer, "E03");
+// OBSOLETE }
+// OBSOLETE else
+// OBSOLETE strcpy(remcomOutBuffer,"E01");
+// OBSOLETE break;
+// OBSOLETE
+// OBSOLETE case 'M': /* MAA..AA,LLLL: Write LLLL bytes at address AA.AA return OK */
+// OBSOLETE /* Try to read '%x,%x:'. */
+// OBSOLETE
+// OBSOLETE if (hexToInt(&ptr, &addr)
+// OBSOLETE && *ptr++ == ','
+// OBSOLETE && hexToInt(&ptr, &length)
+// OBSOLETE && *ptr++ == ':')
+// OBSOLETE {
+// OBSOLETE if (hex2mem(ptr, (char *)addr, length, 1))
+// OBSOLETE strcpy(remcomOutBuffer, "OK");
+// OBSOLETE else
+// OBSOLETE strcpy(remcomOutBuffer, "E03");
+// OBSOLETE }
+// OBSOLETE else
+// OBSOLETE strcpy(remcomOutBuffer, "E02");
+// OBSOLETE break;
+// OBSOLETE
+// OBSOLETE case 'c': /* cAA..AA Continue at address AA..AA(optional) */
+// OBSOLETE /* try to read optional parameter, pc unchanged if no parm */
+// OBSOLETE if (hexToInt(&ptr, &addr))
+// OBSOLETE {
+// OBSOLETE registers[PC] = addr;
+// OBSOLETE registers[NPC] = addr + 4;
+// OBSOLETE }
+// OBSOLETE
+// OBSOLETE /* Need to flush the instruction cache here, as we may have deposited a
+// OBSOLETE breakpoint, and the icache probably has no way of knowing that a data ref to
+// OBSOLETE some location may have changed something that is in the instruction cache.
+// OBSOLETE */
+// OBSOLETE
+// OBSOLETE flush_i_cache ();
+// OBSOLETE
+// OBSOLETE if (!(registers[DSR] & 0x1) /* DSU enabled? */
+// OBSOLETE && !(registers[DCR] & 0x200)) /* Are we in break state? */
+// OBSOLETE { /* Yes, set the DSU regs */
+// OBSOLETE write_asi (1, 0xff00, registers[DIA1]);
+// OBSOLETE write_asi (1, 0xff04, registers[DIA2]);
+// OBSOLETE write_asi (1, 0xff08, registers[DDA1]);
+// OBSOLETE write_asi (1, 0xff0c, registers[DDA2]);
+// OBSOLETE write_asi (1, 0xff10, registers[DDV1]);
+// OBSOLETE write_asi (1, 0xff14, registers[DDV2]);
+// OBSOLETE write_asi (1, 0xff1c, registers[DSR]);
+// OBSOLETE write_asi (1, 0xff18, registers[DCR] | 0x200); /* Clear break */
+// OBSOLETE }
+// OBSOLETE
+// OBSOLETE return;
+// OBSOLETE
+// OBSOLETE /* kill the program */
+// OBSOLETE case 'k' : /* do nothing */
+// OBSOLETE break;
+// OBSOLETE #if 0
+// OBSOLETE case 't': /* Test feature */
+// OBSOLETE asm (" std %f30,[%sp]");
+// OBSOLETE break;
+// OBSOLETE #endif
+// OBSOLETE case 'r': /* Reset */
+// OBSOLETE asm ("call 0
+// OBSOLETE nop ");
+// OBSOLETE break;
+// OBSOLETE } /* switch */
+// OBSOLETE
+// OBSOLETE /* reply to the request */
+// OBSOLETE putpacket(remcomOutBuffer);
+// OBSOLETE }
+// 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 void
+// OBSOLETE breakpoint (void)
+// OBSOLETE {
+// OBSOLETE if (!initialized)
+// OBSOLETE return;
+// OBSOLETE
+// OBSOLETE asm(" .globl _breakinst
+// OBSOLETE
+// OBSOLETE _breakinst: ta 1
+// OBSOLETE ");
+// OBSOLETE }
projects / deliverable / binutils-gdb.git / blobdiff