OpenCores

Rev 39	Rev 56
Line 86...	Line 86...
`*`	`*`
`****************************************************************************/`	`****************************************************************************/`

`#include <string.h>`	`#include <string.h>`
`#include <signal.h>`	`#include <signal.h>`
	`#include "asm.h"`

`/************************************************************************`	`/************************************************************************`
`*`	`*`
`* external low-level support routines`	`* external low-level support routines`
`*/`	`*/`

`extern putDebugChar(); /* write a single character */`	`extern putDebugChar(); /* write a single character */`
`extern getDebugChar(); /* read and return a single char */`	`extern getDebugChar(); /* read and return a single char */`

	`/* Pointer to hook for outbyte, set by stub's exception handler. */`
	`extern void (*__outbyte_hook)();`

`/************************************************************************/`	`/************************************************************************/`
`/* BUFMAX defines the maximum number of characters in inbound/outbound buffers*/`	`/* BUFMAX defines the maximum number of characters in inbound/outbound buffers*/`
`/* at least NUMREGBYTES2 are needed for register packets /`	`/* at least NUMREGBYTES2 are needed for register packets /`
`#define BUFMAX 2048`	`#define BUFMAX 2048`

Line 147...	Line 150...
`! This function is called when any SPARC trap (except window overflow or`	`! This function is called when any SPARC trap (except window overflow or`
`! underflow) occurs. It makes sure that the invalid register window is still`	`! 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`	`! available before jumping into C code. It will also restore the world if you`
`! return from handle_exception.`	`! return from handle_exception.`

`.globl _trap_low`	`.globl " STRINGSYM(trap_low) "`
`_trap_low:`	`" STRINGSYM(trap_low) ":`
`mov %psr, %l0`	`mov %psr, %l0`
`mov %wim, %l3`	`mov %wim, %l3`

`srl %l3, %l0, %l4 ! wim >> cwp`	`srl %l3, %l0, %l4 ! wim >> cwp`
`cmp %l4, 1`	`cmp %l4, 1`
Line 239...	Line 242...
`or %l0, 0xf20, %l4`	`or %l0, 0xf20, %l4`
`mov %l4, %psr ! Turn on traps, disable interrupts`	`mov %l4, %psr ! Turn on traps, disable interrupts`
`nop`	`nop`
`nop`	`nop`
`nop`	`nop`
`call _get_in_break_mode`	`call " STRINGSYM(get_in_break_mode) "`
`nop`	`nop`
`nop`	`nop`
`nop`	`nop`

`sethi %hi(0xff00), %l5`	`sethi %hi(0xff00), %l5`
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`or %l0, 0xf20, %l4`	`or %l0, 0xf20, %l4`
`mov %l4, %psr ! Turn on traps, disable interrupts`	`mov %l4, %psr ! Turn on traps, disable interrupts`
`nop`	`nop`
`nop`	`nop`
`nop`	`nop`
`call _handle_exception`	`call " STRINGSYM(handle_exception) "`
`add %sp, 24 * 4, %o0 ! Pass address of registers`	`add %sp, 24 * 4, %o0 ! Pass address of registers`

`! Reload all of the registers that aren't on the stack`	`! Reload all of the registers that aren't on the stack`

`ld [%sp + (24 + 1) * 4], %g1 ! registers[Gx]`	`ld [%sp + (24 + 1) * 4], %g1 ! registers[Gx]`
Line 579...	Line 582...
`! past the faulting instruction after setting mem_err.`	`! past the faulting instruction after setting mem_err.`

`.text`	`.text`
`.align 4`	`.align 4`

`_fltr_set_mem_err:`	`" STRINGSYM(fltr_set_mem_err) ":`
`sethi %hi(_mem_err), %l0`	`sethi %hi(" STRINGSYM(mem_err) "), %l0`
`st %l1, [%l0 + %lo(_mem_err)]`	`st %l1, [%l0 + %lo(" STRINGSYM(mem_err) ")]`
`jmpl %l2, %g0`	`jmpl %l2, %g0`
`rett %l2+4`	`rett %l2+4`
`");`	`");`

`static void`	`static void`
Line 603...	Line 606...

`asm ("`	`asm ("`
`.text`	`.text`
`.align 4`	`.align 4`

`_dummy_hw_breakpoint:`	`" STRINGSYM(dummy_hw_breakpoint) ":`
`jmpl %l2, %g0`	`jmpl %l2, %g0`
`rett %l2+4`	`rett %l2+4`
`nop`	`nop`
`nop`	`nop`
`");`	`");`
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`}`	`}`

`return (numChars);`	`return (numChars);`
`}`	`}`

	`/* Replacement for outbyte that sends a packet to GDB containing`
	`the character to be output. */`

	`static void`
	`outbyte_stub (int c)`
	`{`
	`static char buf[4];`

	`buf[0] = 'O';`
	`buf[1] = hexchars[(c >> 4) & 0xf];`
	`buf[2] = hexchars[c % 16];`
	`buf[3] = 0;`
	`putpacket (buf);`
	`}`


`/*`	`/*`
`* This function does all command procesing for interfacing to gdb. It`	`* This function does all command procesing for interfacing to gdb. It`
`* returns 1 if you should skip the instruction at the trap address, 0`	`* returns 1 if you should skip the instruction at the trap address, 0`
`* otherwise.`	`* otherwise.`
`*/`	`*/`
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`*ptr++ = 0;`	`*ptr++ = 0;`

`putpacket(remcomOutBuffer);`	`putpacket(remcomOutBuffer);`

	`__outbyte_hook = outbyte_stub;`

`while (1)`	`while (1)`
`{`	`{`
`remcomOutBuffer[0] = 0;`	`remcomOutBuffer[0] = 0;`

`getpacket(remcomInBuffer);`	`getpacket(remcomInBuffer);`
Line 967...	Line 988...
`breakpoint()`	`breakpoint()`
`{`	`{`
`if (!initialized)`	`if (!initialized)`
`return;`	`return;`

`asm(" .globl _breakinst`	`asm(" .globl " STRINGSYM(breakinst) "`

`_breakinst: ta 1`	`" STRINGSYM(breakinst) ": ta 1`
`");`	`");`
`}`	`}`

`static void`	`static void`
`hw_breakpoint()`	`hw_breakpoint()`

Line 86...

 ****************************************************************************/

 ****************************************************************************/

#include <string.h>

#include <string.h>

#include <signal.h>

#include <signal.h>

#include "asm.h"

/************************************************************************

/************************************************************************

 * external low-level support routines

 * external low-level support routines

*/

*/

extern putDebugChar();   /* write a single character      */

extern putDebugChar();   /* write a single character      */

extern getDebugChar();   /* read and return a single char */

extern getDebugChar();   /* read and return a single char */

/* Pointer to hook for outbyte, set by stub's exception handler.  */

extern void (*__outbyte_hook)();

/************************************************************************/

/************************************************************************/

/* BUFMAX defines the maximum number of characters in inbound/outbound buffers*/

/* BUFMAX defines the maximum number of characters in inbound/outbound buffers*/

/* at least NUMREGBYTES*2 are needed for register packets */

/* at least NUMREGBYTES*2 are needed for register packets */

#define BUFMAX 2048

#define BUFMAX 2048

Line 147...

Line 150...

! This function is called when any SPARC trap (except window overflow or

! This function is called when any SPARC trap (except window overflow or

! underflow) occurs.  It makes sure that the invalid register window is still

! 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

! available before jumping into C code.  It will also restore the world if you

! return from handle_exception.

! return from handle_exception.

        .globl _trap_low

        .globl " STRINGSYM(trap_low) "

_trap_low:

" STRINGSYM(trap_low) ":

        mov     %psr, %l0

        mov     %psr, %l0

        mov     %wim, %l3

        mov     %wim, %l3

        srl     %l3, %l0, %l4           ! wim >> cwp

        srl     %l3, %l0, %l4           ! wim >> cwp

        cmp     %l4, 1

        cmp     %l4, 1

Line 239...

Line 242...

        or      %l0, 0xf20, %l4

        or      %l0, 0xf20, %l4

        mov     %l4, %psr               ! Turn on traps, disable interrupts

        mov     %l4, %psr               ! Turn on traps, disable interrupts

nop

nop

nop

nop

nop

nop

        call    _get_in_break_mode

        call    " STRINGSYM(get_in_break_mode) "

nop

nop

nop

nop

nop

nop

        sethi   %hi(0xff00), %l5

        sethi   %hi(0xff00), %l5

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Line 280...

        or      %l0, 0xf20, %l4

        or      %l0, 0xf20, %l4

        mov     %l4, %psr               ! Turn on traps, disable interrupts

        mov     %l4, %psr               ! Turn on traps, disable interrupts

nop

nop

nop

nop

nop

nop

        call    _handle_exception

        call    " STRINGSYM(handle_exception) "

        add     %sp, 24 * 4, %o0        ! Pass address of registers

        add     %sp, 24 * 4, %o0        ! Pass address of registers

! Reload all of the registers that aren't on the stack

! Reload all of the registers that aren't on the stack

        ld      [%sp + (24 + 1) * 4], %g1 ! registers[Gx]

        ld      [%sp + (24 + 1) * 4], %g1 ! registers[Gx]

Line 579...

Line 582...

! past the faulting instruction after setting mem_err.

! past the faulting instruction after setting mem_err.

        .text

        .text

        .align 4

        .align 4

_fltr_set_mem_err:

" STRINGSYM(fltr_set_mem_err) ":

        sethi %hi(_mem_err), %l0

        sethi %hi(" STRINGSYM(mem_err) "), %l0

        st %l1, [%l0 + %lo(_mem_err)]

        st %l1, [%l0 + %lo(" STRINGSYM(mem_err) ")]

        jmpl %l2, %g0

        jmpl %l2, %g0

        rett %l2+4

        rett %l2+4

");

");

static void

static void

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Line 606...

asm ("

asm ("

        .text

        .text

        .align 4

        .align 4

_dummy_hw_breakpoint:

" STRINGSYM(dummy_hw_breakpoint) ":

        jmpl %l2, %g0

        jmpl %l2, %g0

        rett %l2+4

        rett %l2+4

nop

nop

nop

nop

");

");

Line 682...

Line 685...

  return (numChars);

  return (numChars);

/* Replacement for outbyte that sends a packet to GDB containing

   the character to be output.  */

static void

outbyte_stub (int c)

  static char buf[4];

  buf[0] = 'O';

  buf[1] = hexchars[(c >> 4) & 0xf];

  buf[2] = hexchars[c % 16];

  buf[3] = 0;

  putpacket (buf);

/*

/*

 * This function does all command procesing for interfacing to gdb.  It

 * This function does all command procesing for interfacing to gdb.  It

 * returns 1 if you should skip the instruction at the trap address, 0

 * returns 1 if you should skip the instruction at the trap address, 0

 * otherwise.

 * otherwise.

*/

*/

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Line 799...

  *ptr++ = 0;

  *ptr++ = 0;

  putpacket(remcomOutBuffer);

  putpacket(remcomOutBuffer);

  __outbyte_hook = outbyte_stub;

  while (1)

  while (1)

      remcomOutBuffer[0] = 0;

      remcomOutBuffer[0] = 0;

      getpacket(remcomInBuffer);

      getpacket(remcomInBuffer);

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Line 988...

breakpoint()

breakpoint()

  if (!initialized)

  if (!initialized)

    return;

    return;

  asm(" .globl _breakinst

  asm(" .globl " STRINGSYM(breakinst) "

        _breakinst: ta 1

        " STRINGSYM(breakinst) ": ta 1

");

");

static void

static void

hw_breakpoint()

hw_breakpoint()

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