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binutils-gdb/gdb/sparclet-stub.c

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// 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
// OBSOLETE /************************************************************************
// OBSOLETE *
// OBSOLETE * external low-level support routines
// OBSOLETE */
// OBSOLETE
// OBSOLETE extern void putDebugChar(); /* write a single character */
// OBSOLETE extern int getDebugChar(); /* 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 static int remote_debug = 0; /* turn on verbose debugging */
// OBSOLETE
// OBSOLETE extern void breakinst();
// OBSOLETE void _cprint();
// OBSOLETE static void hw_breakpoint();
// OBSOLETE static void set_mem_fault_trap();
// OBSOLETE static void get_in_break_mode();
// OBSOLETE static unsigned char *mem2hex();
// OBSOLETE
// OBSOLETE static const char hexchars[]="0123456789abcdef";
// OBSOLETE
// OBSOLETE #define NUMREGS 121
// OBSOLETE
// OBSOLETE static unsigned long saved_stack_pointer;
// 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
// OBSOLETE Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR,
// OBSOLETE CCSR, CCPR, CCCRCR, CCOR, CCOBR, CCIBR, CCIR, UNUSED1,
// OBSOLETE
// OBSOLETE ASR1, ASR15, ASR17, ASR18, ASR19, ASR20, ASR21, ASR22,
// OBSOLETE /* the following not actually implemented */
// OBSOLETE AWR0, AWR1, AWR2, AWR3, AWR4, AWR5, AWR6, AWR7,
// OBSOLETE AWR8, AWR9, AWR10, AWR11, AWR12, AWR13, AWR14, AWR15,
// OBSOLETE AWR16, AWR17, AWR18, AWR19, AWR20, AWR21, AWR22, AWR23,
// OBSOLETE AWR24, AWR25, AWR26, AWR27, AWR28, AWR29, AWR30, AWR31,
// OBSOLETE APSR
// OBSOLETE };
// OBSOLETE
// OBSOLETE /*************************** ASSEMBLY CODE MACROS *************************/
// OBSOLETE /* */
// OBSOLETE
// OBSOLETE extern void trap_low();
// 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
// OBSOLETE .globl _trap_low
// OBSOLETE _trap_low:
// OBSOLETE mov %psr, %l0
// OBSOLETE mov %wim, %l3
// OBSOLETE
// OBSOLETE srl %l3, %l0, %l4 ! wim >> cwp
// OBSOLETE and %l4, 0xff, %l4 ! Mask off windows 28, 29
// 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 and %g1, 0xff, %g1 ! Mask off windows 28, 29
// 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 ! The normal way doesn't work on the sparclet as register windows
// OBSOLETE ! 28 and 29 are special purpose windows.
// 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
// OBSOLETE mov 0x80, %g1 ! Hack for sparclet
// OBSOLETE
// OBSOLETE ! This doesn't work on the sparclet.
// OBSOLETE !mov %g0, %wim ! Clear wim so that subsequent save
// OBSOLETE ! won't trap
// OBSOLETE andn %l3, 0xff, %l5 ! Clear wim but not windows 28, 29
// OBSOLETE mov %l5, %wim
// OBSOLETE nop
// 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+88)*4,%sp ! Make room for input & locals
// OBSOLETE ! + hidden arg + arg spill
// OBSOLETE ! + doubleword alignment
// OBSOLETE ! + registers[121]
// 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 ! FP regs (sparclet doesn't have fpu)
// 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 ! CPSR and FPSR not impl
// OBSOLETE or %l0, 0xf20, %l4
// OBSOLETE mov %l4, %psr ! Turn on traps, disable interrupts
// OBSOLETE nop
// OBSOLETE nop
// OBSOLETE nop
// OBSOLETE
// OBSOLETE ! Save coprocessor state.
// OBSOLETE ! See SK/demo/hdlc_demo/ldc_swap_context.S.
// OBSOLETE
// OBSOLETE mov %psr, %l0
// OBSOLETE sethi %hi(0x2000), %l5 ! EC bit in PSR
// OBSOLETE or %l5, %l0, %l5
// OBSOLETE mov %l5, %psr ! enable coprocessor
// OBSOLETE nop ! 3 nops after write to %psr (needed?)
// OBSOLETE nop
// OBSOLETE nop
// OBSOLETE crdcxt %ccsr, %l1 ! capture CCSR
// OBSOLETE mov 0x6, %l2
// OBSOLETE cwrcxt %l2, %ccsr ! set CCP state machine for CCFR
// OBSOLETE crdcxt %ccfr, %l2 ! capture CCOR
// OBSOLETE cwrcxt %l2, %ccfr ! tickle CCFR
// OBSOLETE crdcxt %ccfr, %l3 ! capture CCOBR
// OBSOLETE cwrcxt %l3, %ccfr ! tickle CCFR
// OBSOLETE crdcxt %ccfr, %l4 ! capture CCIBR
// OBSOLETE cwrcxt %l4, %ccfr ! tickle CCFR
// OBSOLETE crdcxt %ccfr, %l5 ! capture CCIR
// OBSOLETE cwrcxt %l5, %ccfr ! tickle CCFR
// OBSOLETE crdcxt %ccpr, %l6 ! capture CCPR
// OBSOLETE crdcxt %cccrcr, %l7 ! capture CCCRCR
// OBSOLETE st %l1, [%sp + (24 + 72) * 4] ! save CCSR
// OBSOLETE st %l2, [%sp + (24 + 75) * 4] ! save CCOR
// OBSOLETE st %l3, [%sp + (24 + 76) * 4] ! save CCOBR
// OBSOLETE st %l4, [%sp + (24 + 77) * 4] ! save CCIBR
// OBSOLETE st %l5, [%sp + (24 + 78) * 4] ! save CCIR
// OBSOLETE st %l6, [%sp + (24 + 73) * 4] ! save CCPR
// OBSOLETE st %l7, [%sp + (24 + 74) * 4] ! save CCCRCR
// OBSOLETE mov %l0, %psr ! restore original PSR
// OBSOLETE nop ! 3 nops after write to %psr (needed?)
// OBSOLETE nop
// OBSOLETE nop
// OBSOLETE
// OBSOLETE ! End of saving coprocessor state.
// OBSOLETE ! Save asr regs
// OBSOLETE
// OBSOLETE ! Part of this is silly -- we should not display ASR15 or ASR19 at all.
// OBSOLETE
// OBSOLETE sethi %hi(0x01000000), %l6
// OBSOLETE st %l6, [%sp + (24 + 81) * 4] ! ASR15 == NOP
// OBSOLETE sethi %hi(0xdeadc0de), %l6
// OBSOLETE or %l6, %lo(0xdeadc0de), %l6
// OBSOLETE st %l6, [%sp + (24 + 84) * 4] ! ASR19 == DEADC0DE
// OBSOLETE
// OBSOLETE rd %asr1, %l4
// OBSOLETE st %l4, [%sp + (24 + 80) * 4]
// OBSOLETE ! rd %asr15, %l4 ! must not read ASR15
// OBSOLETE ! st %l4, [%sp + (24 + 81) * 4] ! (illegal instr trap)
// OBSOLETE rd %asr17, %l4
// OBSOLETE st %l4, [%sp + (24 + 82) * 4]
// OBSOLETE rd %asr18, %l4
// OBSOLETE st %l4, [%sp + (24 + 83) * 4]
// OBSOLETE ! rd %asr19, %l4 ! must not read asr19
// OBSOLETE ! st %l4, [%sp + (24 + 84) * 4] ! (halts the CPU)
// OBSOLETE rd %asr20, %l4
// OBSOLETE st %l4, [%sp + (24 + 85) * 4]
// OBSOLETE rd %asr21, %l4
// OBSOLETE st %l4, [%sp + (24 + 86) * 4]
// OBSOLETE rd %asr22, %l4
// OBSOLETE st %l4, [%sp + (24 + 87) * 4]
// OBSOLETE
// OBSOLETE ! End of saving asr regs
// 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 ! FP regs (sparclet doesn't have fpu)
// OBSOLETE
// OBSOLETE ! Update the coprocessor registers.
// OBSOLETE ! See SK/demo/hdlc_demo/ldc_swap_context.S.
// OBSOLETE
// OBSOLETE mov %psr, %l0
// OBSOLETE sethi %hi(0x2000), %l5 ! EC bit in PSR
// OBSOLETE or %l5, %l0, %l5
// OBSOLETE mov %l5, %psr ! enable coprocessor
// OBSOLETE nop ! 3 nops after write to %psr (needed?)
// OBSOLETE nop
// OBSOLETE nop
// OBSOLETE
// OBSOLETE mov 0x6, %l2
// OBSOLETE cwrcxt %l2, %ccsr ! set CCP state machine for CCFR
// OBSOLETE
// OBSOLETE ld [%sp + (24 + 72) * 4], %l1 ! saved CCSR
// OBSOLETE ld [%sp + (24 + 75) * 4], %l2 ! saved CCOR
// OBSOLETE ld [%sp + (24 + 76) * 4], %l3 ! saved CCOBR
// OBSOLETE ld [%sp + (24 + 77) * 4], %l4 ! saved CCIBR
// OBSOLETE ld [%sp + (24 + 78) * 4], %l5 ! saved CCIR
// OBSOLETE ld [%sp + (24 + 73) * 4], %l6 ! saved CCPR
// OBSOLETE ld [%sp + (24 + 74) * 4], %l7 ! saved CCCRCR
// OBSOLETE
// OBSOLETE cwrcxt %l2, %ccfr ! restore CCOR
// OBSOLETE cwrcxt %l3, %ccfr ! restore CCOBR
// OBSOLETE cwrcxt %l4, %ccfr ! restore CCIBR
// OBSOLETE cwrcxt %l5, %ccfr ! restore CCIR
// OBSOLETE cwrcxt %l6, %ccpr ! restore CCPR
// OBSOLETE cwrcxt %l7, %cccrcr ! restore CCCRCR
// OBSOLETE cwrcxt %l1, %ccsr ! restore CCSR
// OBSOLETE
// OBSOLETE mov %l0, %psr ! restore PSR
// OBSOLETE nop ! 3 nops after write to %psr (needed?)
// OBSOLETE nop
// OBSOLETE nop
// OBSOLETE
// OBSOLETE ! End of coprocessor handling stuff.
// OBSOLETE ! Update asr regs
// OBSOLETE
// OBSOLETE ld [%sp + (24 + 80) * 4], %l4
// OBSOLETE wr %l4, %asr1
// OBSOLETE ! ld [%sp + (24 + 81) * 4], %l4 ! can't write asr15
// OBSOLETE ! wr %l4, %asr15
// OBSOLETE ld [%sp + (24 + 82) * 4], %l4
// OBSOLETE wr %l4, %asr17
// OBSOLETE ld [%sp + (24 + 83) * 4], %l4
// OBSOLETE wr %l4, %asr18
// OBSOLETE ! ld [%sp + (24 + 84) * 4], %l4 ! can't write asr19
// OBSOLETE ! wr %l4, %asr19
// OBSOLETE ! ld [%sp + (24 + 85) * 4], %l4 ! can't write asr20
// OBSOLETE ! wr %l4, %asr20
// OBSOLETE ! ld [%sp + (24 + 86) * 4], %l4 ! can't write asr21
// OBSOLETE ! wr %l4, %asr21
// OBSOLETE ld [%sp + (24 + 87) * 4], %l4
// OBSOLETE wr %l4, %asr22
// OBSOLETE
// OBSOLETE ! End of restoring asr regs
// OBSOLETE
// OBSOLETE
// OBSOLETE ldd [%sp + (24 + 64) * 4], %l0 ! Y & PSR
// OBSOLETE ldd [%sp + (24 + 68) * 4], %l2 ! PC & NPC
// 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 nop ! 3 nops after write to %psr (needed?)
// OBSOLETE nop
// OBSOLETE nop
// OBSOLETE
// 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 {1, SIGSEGV}, /* instruction access exception */
// OBSOLETE {0x3b, SIGSEGV}, /* instruction access error */
// OBSOLETE {2, SIGILL}, /* illegal instruction */
// OBSOLETE {3, SIGILL}, /* privileged instruction */
// OBSOLETE {4, SIGEMT}, /* fp disabled */
// OBSOLETE {0x24, SIGEMT}, /* cp disabled */
// OBSOLETE {7, SIGBUS}, /* mem address not aligned */
// OBSOLETE {0x29, SIGSEGV}, /* data access exception */
// OBSOLETE {10, SIGEMT}, /* tag overflow */
// OBSOLETE {128+1, SIGTRAP}, /* ta 1 - normal breakpoint instruction */
// 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 for (ht = hard_trap_info; ht->tt && ht->signo; ht++)
// 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(0x29, fltr_set_mem_err);
// OBSOLETE else
// OBSOLETE exceptionHandler(0x29, 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 set_hw_breakpoint_trap (int enable)
// OBSOLETE {
// OBSOLETE extern void dummy_hw_breakpoint();
// OBSOLETE
// OBSOLETE if (enable)
// OBSOLETE exceptionHandler(255, dummy_hw_breakpoint);
// OBSOLETE else
// OBSOLETE exceptionHandler(255, trap_low);
// OBSOLETE }
// OBSOLETE
// OBSOLETE static void
// OBSOLETE get_in_break_mode (void)
// OBSOLETE {
// OBSOLETE #if 0
// OBSOLETE int x;
// OBSOLETE mesg("get_in_break_mode, sp = ");
// OBSOLETE phex(&x);
// OBSOLETE #endif
// OBSOLETE set_hw_breakpoint_trap(1);
// OBSOLETE
// OBSOLETE asm("
// OBSOLETE sethi %hi(0xff10), %l4
// OBSOLETE or %l4, %lo(0xff10), %l4
// OBSOLETE sta %g0, [%l4]0x1
// OBSOLETE nop
// OBSOLETE nop
// OBSOLETE nop
// OBSOLETE ");
// OBSOLETE
// OBSOLETE set_hw_breakpoint_trap(0);
// 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("
// OBSOLETE ! Ugh. sparclet has broken save
// OBSOLETE !save %sp, -64, %sp
// OBSOLETE save
// OBSOLETE add %fp,-64,%sp
// OBSOLETE !save %sp, -64, %sp
// OBSOLETE save
// OBSOLETE add %fp,-64,%sp
// OBSOLETE !save %sp, -64, %sp
// OBSOLETE save
// OBSOLETE add %fp,-64,%sp
// OBSOLETE !save %sp, -64, %sp
// OBSOLETE save
// OBSOLETE add %fp,-64,%sp
// OBSOLETE !save %sp, -64, %sp
// OBSOLETE save
// OBSOLETE add %fp,-64,%sp
// OBSOLETE !save %sp, -64, %sp
// OBSOLETE save
// OBSOLETE add %fp,-64,%sp
// OBSOLETE !save %sp, -64, %sp
// OBSOLETE save
// OBSOLETE add %fp,-64,%sp
// OBSOLETE !save %sp, -64, %sp
// OBSOLETE save
// OBSOLETE add %fp,-64,%sp
// OBSOLETE restore
// OBSOLETE restore
// OBSOLETE restore
// OBSOLETE restore
// OBSOLETE restore
// OBSOLETE restore
// OBSOLETE restore
// OBSOLETE restore
// OBSOLETE ");
// 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 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 *)&registers[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 *)&registers[NPC], ptr, 4, 0);
// OBSOLETE *ptr++ = ';';
// OBSOLETE
// OBSOLETE *ptr++ = hexchars[O7 >> 4];
// OBSOLETE *ptr++ = hexchars[O7 & 0xf];
// OBSOLETE *ptr++ = ':';
// OBSOLETE ptr = mem2hex((char *)&registers[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 remote_debug = !(remote_debug); /* toggle debug flag */
// OBSOLETE break;
// OBSOLETE
// OBSOLETE case 'g': /* return the value of the CPU registers */
// OBSOLETE {
// OBSOLETE ptr = remcomOutBuffer;
// OBSOLETE ptr = mem2hex((char *)registers, ptr, 16 * 4, 0); /* G & O regs */
// OBSOLETE ptr = mem2hex(sp + 0, ptr, 16 * 4, 0); /* L & I regs */
// OBSOLETE memset(ptr, '0', 32 * 8); /* Floating point */
// OBSOLETE ptr = mem2hex((char *)&registers[Y],
// OBSOLETE ptr + 32 * 4 * 2,
// OBSOLETE 8 * 4,
// OBSOLETE 0); /* Y, PSR, WIM, TBR, PC, NPC, FPSR, CPSR */
// OBSOLETE ptr = mem2hex((char *)&registers[CCSR],
// OBSOLETE ptr,
// OBSOLETE 8 * 4,
// OBSOLETE 0); /* CCSR, CCPR, CCCRCR, CCOR, CCOBR, CCIBR, CCIR */
// OBSOLETE ptr = mem2hex((char *)&registers[ASR1],
// OBSOLETE ptr,
// OBSOLETE 8 * 4,
// OBSOLETE 0); /* ASR1,ASR15,ASR17,ASR18,ASR19,ASR20,ASR21,ASR22 */
// OBSOLETE #if 0 /* not implemented */
// OBSOLETE ptr = mem2hex((char *) &registers[AWR0],
// OBSOLETE ptr,
// OBSOLETE 32 * 4,
// OBSOLETE 0); /* Alternate Window Registers */
// OBSOLETE #endif
// OBSOLETE }
// OBSOLETE break;
// OBSOLETE
// OBSOLETE case 'G': /* set value of all the CPU registers - return OK */
// OBSOLETE case 'P': /* set value of one CPU register - return OK */
// OBSOLETE {
// OBSOLETE unsigned long *newsp, psr;
// OBSOLETE
// OBSOLETE psr = registers[PSR];
// OBSOLETE
// OBSOLETE if (ptr[-1] == 'P') /* do a single register */
// OBSOLETE {
// OBSOLETE int regno;
// OBSOLETE
// OBSOLETE if (hexToInt (&ptr, &regno)
// OBSOLETE && *ptr++ == '=')
// OBSOLETE if (regno >= L0 && regno <= I7)
// OBSOLETE hex2mem (ptr, sp + regno - L0, 4, 0);
// OBSOLETE else
// OBSOLETE hex2mem (ptr, (char *)&registers[regno], 4, 0);
// OBSOLETE else
// OBSOLETE {
// OBSOLETE strcpy (remcomOutBuffer, "E01");
// OBSOLETE break;
// OBSOLETE }
// OBSOLETE }
// OBSOLETE else
// OBSOLETE {
// OBSOLETE hex2mem(ptr, (char *)registers, 16 * 4, 0); /* G & O regs */
// OBSOLETE hex2mem(ptr + 16 * 4 * 2, sp + 0, 16 * 4, 0); /* L & I regs */
// OBSOLETE hex2mem(ptr + 64 * 4 * 2, (char *)&registers[Y],
// OBSOLETE 8 * 4, 0); /* Y,PSR,WIM,TBR,PC,NPC,FPSR,CPSR */
// OBSOLETE hex2mem(ptr + 72 * 4 * 2, (char *)&registers[CCSR],
// OBSOLETE 8 * 4, 0); /* CCSR,CCPR,CCCRCR,CCOR,CCOBR,CCIBR,CCIR */
// OBSOLETE hex2mem(ptr + 80 * 4 * 2, (char *)&registers[ASR1],
// OBSOLETE 8 * 4, 0); /* ASR1 ... ASR22 */
// OBSOLETE #if 0 /* not implemented */
// OBSOLETE hex2mem(ptr + 88 * 4 * 2, (char *)&registers[AWR0],
// OBSOLETE 8 * 4, 0); /* Alternate Window Registers */
// OBSOLETE #endif
// 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
// 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 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 }
// OBSOLETE
// OBSOLETE static void
// OBSOLETE hw_breakpoint (void)
// OBSOLETE {
// OBSOLETE asm("
// OBSOLETE ta 127
// OBSOLETE ");
// OBSOLETE }
// OBSOLETE
// OBSOLETE #if 0 /* experimental and never finished, left here for reference */
// OBSOLETE static void
// OBSOLETE splet_temp(void)
// OBSOLETE {
// OBSOLETE asm(" sub %sp,(16+1+6+1+121)*4,%sp ! Make room for input & locals
// OBSOLETE ! + hidden arg + arg spill
// OBSOLETE ! + doubleword alignment
// OBSOLETE ! + registers[121]
// OBSOLETE
// OBSOLETE ! Leave a trail of breadcrumbs! (save register save area for debugging)
// OBSOLETE mov %sp, %l0
// OBSOLETE add %l0, 24*4, %l0
// OBSOLETE sethi %hi(_debug_registers), %l1
// OBSOLETE st %l0, [%lo(_debug_registers) + %l1]
// OBSOLETE
// OBSOLETE ! Save the Alternate Register Set: (not implemented yet)
// OBSOLETE ! To save the Alternate Register set, we must:
// OBSOLETE ! 1) Save the current SP in some global location.
// OBSOLETE ! 2) Swap the register sets.
// OBSOLETE ! 3) Save the Alternate SP in the Y register
// OBSOLETE ! 4) Fetch the SP that we saved in step 1.
// OBSOLETE ! 5) Use that to save the rest of the regs (not forgetting ASP in Y)
// OBSOLETE ! 6) Restore the Alternate SP from Y
// OBSOLETE ! 7) Swap the registers back.
// OBSOLETE
// OBSOLETE ! 1) Copy the current stack pointer to global _SAVED_STACK_POINTER:
// OBSOLETE sethi %hi(_saved_stack_pointer), %l0
// OBSOLETE st %sp, [%lo(_saved_stack_pointer) + %l0]
// OBSOLETE
// OBSOLETE ! 2) Swap the register sets:
// OBSOLETE mov %psr, %l1
// OBSOLETE sethi %hi(0x10000), %l2
// OBSOLETE xor %l1, %l2, %l1
// OBSOLETE mov %l1, %psr
// OBSOLETE nop ! 3 nops after write to %psr (needed?)
// OBSOLETE nop
// OBSOLETE nop
// OBSOLETE
// OBSOLETE ! 3) Save Alternate L0 in Y
// OBSOLETE wr %l0, 0, %y
// OBSOLETE
// OBSOLETE ! 4) Load former SP into alternate SP, using L0
// OBSOLETE sethi %hi(_saved_stack_pointer), %l0
// OBSOLETE or %lo(_saved_stack_pointer), %l0, %l0
// OBSOLETE swap [%l0], %sp
// OBSOLETE
// OBSOLETE ! 4.5) Restore alternate L0
// OBSOLETE rd %y, %l0
// OBSOLETE
// OBSOLETE ! 5) Save the Alternate Window Registers
// OBSOLETE st %r0, [%sp + (24 + 88) * 4] ! AWR0
// OBSOLETE st %r1, [%sp + (24 + 89) * 4] ! AWR1
// OBSOLETE st %r2, [%sp + (24 + 90) * 4] ! AWR2
// OBSOLETE st %r3, [%sp + (24 + 91) * 4] ! AWR3
// OBSOLETE st %r4, [%sp + (24 + 92) * 4] ! AWR4
// OBSOLETE st %r5, [%sp + (24 + 93) * 4] ! AWR5
// OBSOLETE st %r6, [%sp + (24 + 94) * 4] ! AWR6
// OBSOLETE st %r7, [%sp + (24 + 95) * 4] ! AWR7
// OBSOLETE st %r8, [%sp + (24 + 96) * 4] ! AWR8
// OBSOLETE st %r9, [%sp + (24 + 97) * 4] ! AWR9
// OBSOLETE st %r10, [%sp + (24 + 98) * 4] ! AWR10
// OBSOLETE st %r11, [%sp + (24 + 99) * 4] ! AWR11
// OBSOLETE st %r12, [%sp + (24 + 100) * 4] ! AWR12
// OBSOLETE st %r13, [%sp + (24 + 101) * 4] ! AWR13
// OBSOLETE ! st %r14, [%sp + (24 + 102) * 4] ! AWR14 (SP)
// OBSOLETE st %r15, [%sp + (24 + 103) * 4] ! AWR15
// OBSOLETE st %r16, [%sp + (24 + 104) * 4] ! AWR16
// OBSOLETE st %r17, [%sp + (24 + 105) * 4] ! AWR17
// OBSOLETE st %r18, [%sp + (24 + 106) * 4] ! AWR18
// OBSOLETE st %r19, [%sp + (24 + 107) * 4] ! AWR19
// OBSOLETE st %r20, [%sp + (24 + 108) * 4] ! AWR20
// OBSOLETE st %r21, [%sp + (24 + 109) * 4] ! AWR21
// OBSOLETE st %r22, [%sp + (24 + 110) * 4] ! AWR22
// OBSOLETE st %r23, [%sp + (24 + 111) * 4] ! AWR23
// OBSOLETE st %r24, [%sp + (24 + 112) * 4] ! AWR24
// OBSOLETE st %r25, [%sp + (24 + 113) * 4] ! AWR25
// OBSOLETE st %r26, [%sp + (24 + 114) * 4] ! AWR26
// OBSOLETE st %r27, [%sp + (24 + 115) * 4] ! AWR27
// OBSOLETE st %r28, [%sp + (24 + 116) * 4] ! AWR28
// OBSOLETE st %r29, [%sp + (24 + 117) * 4] ! AWR29
// OBSOLETE st %r30, [%sp + (24 + 118) * 4] ! AWR30
// OBSOLETE st %r31, [%sp + (24 + 119) * 4] ! AWR21
// OBSOLETE
// OBSOLETE ! Get the Alternate PSR (I hope...)
// OBSOLETE
// OBSOLETE rd %psr, %l2
// OBSOLETE st %l2, [%sp + (24 + 120) * 4] ! APSR
// OBSOLETE
// OBSOLETE ! Don't forget the alternate stack pointer
// OBSOLETE
// OBSOLETE rd %y, %l3
// OBSOLETE st %l3, [%sp + (24 + 102) * 4] ! AWR14 (SP)
// OBSOLETE
// OBSOLETE ! 6) Restore the Alternate SP (saved in Y)
// OBSOLETE
// OBSOLETE rd %y, %o6
// OBSOLETE
// OBSOLETE
// OBSOLETE ! 7) Swap the registers back:
// OBSOLETE
// OBSOLETE mov %psr, %l1
// OBSOLETE sethi %hi(0x10000), %l2
// OBSOLETE xor %l1, %l2, %l1
// OBSOLETE mov %l1, %psr
// OBSOLETE nop ! 3 nops after write to %psr (needed?)
// OBSOLETE nop
// OBSOLETE nop
// OBSOLETE ");
// OBSOLETE }
// OBSOLETE
// OBSOLETE #endif
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