diff options
Diffstat (limited to 'gdb/sparcl-stub.c')
| -rw-r--r-- | gdb/sparcl-stub.c | 946 |
1 files changed, 0 insertions, 946 deletions
diff --git a/gdb/sparcl-stub.c b/gdb/sparcl-stub.c deleted file mode 100644 index 6ba55a0..0000000 --- a/gdb/sparcl-stub.c +++ /dev/null @@ -1,946 +0,0 @@ -// 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 } |