unsigned int usp; /* 0x66 User mode stack pointer */
} registers;
-/************** Prototypes for local library functions ***********************/
-
-/* Copy of strcpy from libc. */
-static char *gdb_cris_strcpy (char *s1, const char *s2);
-
-/* Copy of strlen from libc. */
-static int gdb_cris_strlen (const char *s);
-
-/* Copy of memchr from libc. */
-static void *gdb_cris_memchr (const void *s, int c, int n);
-
-/* Copy of strtol from libc. Does only support base 16. */
-static int gdb_cris_strtol (const char *s, char **endptr, int base);
-
-/********************** Prototypes for local functions. **********************/
-/* Copy the content of a register image into another. The size n is
- the size of the register image. Due to struct assignment generation of
- memcpy in libc. */
-static void copy_registers (registers *dptr, registers *sptr, int n);
-
-/* Copy the stored registers from the stack. Put the register contents
- of thread thread_id in the struct reg. */
-static void copy_registers_from_stack (int thread_id, registers *reg);
-
-/* Copy the registers to the stack. Put the register contents of thread
- thread_id from struct reg to the stack. */
-static void copy_registers_to_stack (int thread_id, registers *reg);
-
-/* Write a value to a specified register regno in the register image
- of the current thread. */
-static int write_register (int regno, char *val);
-
-/* Write a value to a specified register in the stack of a thread other
- than the current thread. */
-static int write_stack_register(int thread_id, int regno, char *valptr);
-
-/* Read a value from a specified register in the register image. Returns the
- status of the read operation. The register value is returned in valptr. */
-static int read_register (char regno, unsigned int *valptr);
-
/* Serial port, reads one character. ETRAX 100 specific. from debugport.c */
int getDebugChar (void);
void enableDebugIRQ (void);
-/* Returns the integer equivalent of a hexadecimal character. */
-static int hex (char ch);
-
-/* Convert the memory, pointed to by mem into hexadecimal representation.
- Put the result in buf, and return a pointer to the last character
- in buf (null). */
-static char *mem2hex (char *buf, unsigned char *mem, int count);
-
-/* Convert the array, in hexadecimal representation, pointed to by buf into
- binary representation. Put the result in mem, and return a pointer to
- the character after the last byte written. */
-static unsigned char *hex2mem (unsigned char *mem, char *buf, int count);
-
-/* Put the content of the array, in binary representation, pointed to by buf
- into memory pointed to by mem, and return a pointer to
- the character after the last byte written. */
-static unsigned char *bin2mem (unsigned char *mem, unsigned char *buf, int count);
-
-/* Await the sequence $<data>#<checksum> and store <data> in the array buffer
- returned. */
-static void getpacket (char *buffer);
-
-/* Send $<data>#<checksum> from the <data> in the array buffer. */
-static void putpacket (char *buffer);
-
-/* Build and send a response packet in order to inform the host the
- stub is stopped. */
-static void stub_is_stopped (int sigval);
-
-/* All expected commands are sent from remote.c. Send a response according
- to the description in remote.c. */
-static void handle_exception (int sigval);
-
-/* Performs a complete re-start from scratch. ETRAX specific. */
-static void kill_restart (void);
-
/******************** Prototypes for global functions. ***********************/
/* The string str is prepended with the GDB printout token and sent. */
/* The number of characters used for a 64 bit thread identifier. */
#define HEXCHARS_IN_THREAD_ID 16
-/* Avoid warning as the internal_stack is not used in the C-code. */
-#define USEDVAR(name) { if (name) { ; } }
-#define USEDFUN(name) { void (*pf)(void) = (void *)name; USEDVAR(pf) }
-
/********************************** Packet I/O ******************************/
/* BUFMAX defines the maximum number of characters in
inbound/outbound buffers */
/* Contains the register image of the executing thread in the assembler
part of the code in order to avoid horrible addressing modes. */
-static registers reg;
+registers cris_reg;
/* FIXME: Should this be used? Delete otherwise. */
/* Contains the assumed consistency state of the register image. Uses the
static int consistency_status = SUCCESS;
/********************************** Handle exceptions ************************/
-/* The variable reg contains the register image associated with the
+/* The variable cris_reg contains the register image associated with the
current_thread_c variable. It is a complete register image created at
entry. The reg_g contains a register image of a task where the general
registers are taken from the stack and all special registers are taken
in order to provide access mainly for 'g', 'G' and 'P'.
*/
-/* Need two task id pointers in order to handle Hct and Hgt commands. */
-static int current_thread_c = 0;
-static int current_thread_g = 0;
-
-/* Need two register images in order to handle Hct and Hgt commands. The
- variable reg_g is in addition to reg above. */
-static registers reg_g;
-
/********************************** Breakpoint *******************************/
/* Use an internal stack in the breakpoint and interrupt response routines */
#define INTERNAL_STACK_SIZE 1024
-static char internal_stack[INTERNAL_STACK_SIZE];
+char internal_stack[INTERNAL_STACK_SIZE];
/* Due to the breakpoint return pointer, a state variable is needed to keep
track of whether it is a static (compiled) or dynamic (gdb-invoked)
return x;
}
-/********************************* Register image ****************************/
-/* Copy the content of a register image into another. The size n is
- the size of the register image. Due to struct assignment generation of
- memcpy in libc. */
-static void
-copy_registers (registers *dptr, registers *sptr, int n)
-{
- unsigned char *dreg;
- unsigned char *sreg;
-
- for (dreg = (unsigned char*)dptr, sreg = (unsigned char*)sptr; n > 0; n--)
- *dreg++ = *sreg++;
-}
-
-#ifdef PROCESS_SUPPORT
-/* Copy the stored registers from the stack. Put the register contents
- of thread thread_id in the struct reg. */
-static void
-copy_registers_from_stack (int thread_id, registers *regptr)
-{
- int j;
- stack_registers *s = (stack_registers *)stack_list[thread_id];
- unsigned int *d = (unsigned int *)regptr;
-
- for (j = 13; j >= 0; j--)
- *d++ = s->r[j];
- regptr->sp = (unsigned int)stack_list[thread_id];
- regptr->pc = s->pc;
- regptr->dccr = s->dccr;
- regptr->srp = s->srp;
-}
-
-/* Copy the registers to the stack. Put the register contents of thread
- thread_id from struct reg to the stack. */
-static void
-copy_registers_to_stack (int thread_id, registers *regptr)
-{
- int i;
- stack_registers *d = (stack_registers *)stack_list[thread_id];
- unsigned int *s = (unsigned int *)regptr;
-
- for (i = 0; i < 14; i++) {
- d->r[i] = *s++;
- }
- d->pc = regptr->pc;
- d->dccr = regptr->dccr;
- d->srp = regptr->srp;
-}
-#endif
-
-/* Write a value to a specified register in the register image of the current
- thread. Returns status code SUCCESS, E02 or E05. */
-static int
-write_register (int regno, char *val)
-{
- int status = SUCCESS;
- registers *current_reg = ®
-
- if (regno >= R0 && regno <= PC) {
- /* 32-bit register with simple offset. */
- hex2mem ((unsigned char *)current_reg + regno * sizeof(unsigned int),
- val, sizeof(unsigned int));
- }
- else if (regno == P0 || regno == VR || regno == P4 || regno == P8) {
- /* Do not support read-only registers. */
- status = E02;
- }
- else if (regno == CCR) {
- /* 16 bit register with complex offset. (P4 is read-only, P6 is not implemented,
- and P7 (MOF) is 32 bits in ETRAX 100LX. */
- hex2mem ((unsigned char *)&(current_reg->ccr) + (regno-CCR) * sizeof(unsigned short),
- val, sizeof(unsigned short));
- }
- else if (regno >= MOF && regno <= USP) {
- /* 32 bit register with complex offset. (P8 has been taken care of.) */
- hex2mem ((unsigned char *)&(current_reg->ibr) + (regno-IBR) * sizeof(unsigned int),
- val, sizeof(unsigned int));
- }
- else {
- /* Do not support nonexisting or unimplemented registers (P2, P3, and P6). */
- status = E05;
- }
- return status;
-}
-
-#ifdef PROCESS_SUPPORT
-/* Write a value to a specified register in the stack of a thread other
- than the current thread. Returns status code SUCCESS or E07. */
-static int
-write_stack_register (int thread_id, int regno, char *valptr)
-{
- int status = SUCCESS;
- stack_registers *d = (stack_registers *)stack_list[thread_id];
- unsigned int val;
-
- hex2mem ((unsigned char *)&val, valptr, sizeof(unsigned int));
- if (regno >= R0 && regno < SP) {
- d->r[regno] = val;
- }
- else if (regno == SP) {
- stack_list[thread_id] = val;
- }
- else if (regno == PC) {
- d->pc = val;
- }
- else if (regno == SRP) {
- d->srp = val;
- }
- else if (regno == DCCR) {
- d->dccr = val;
- }
- else {
- /* Do not support registers in the current thread. */
- status = E07;
- }
- return status;
-}
-#endif
-
-/* Read a value from a specified register in the register image. Returns the
- value in the register or -1 for non-implemented registers.
- Should check consistency_status after a call which may be E05 after changes
- in the implementation. */
-static int
-read_register (char regno, unsigned int *valptr)
-{
- registers *current_reg = ®
-
- if (regno >= R0 && regno <= PC) {
- /* 32-bit register with simple offset. */
- *valptr = *(unsigned int *)((char *)current_reg + regno * sizeof(unsigned int));
- return SUCCESS;
- }
- else if (regno == P0 || regno == VR) {
- /* 8 bit register with complex offset. */
- *valptr = (unsigned int)(*(unsigned char *)
- ((char *)&(current_reg->p0) + (regno-P0) * sizeof(char)));
- return SUCCESS;
- }
- else if (regno == P4 || regno == CCR) {
- /* 16 bit register with complex offset. */
- *valptr = (unsigned int)(*(unsigned short *)
- ((char *)&(current_reg->p4) + (regno-P4) * sizeof(unsigned short)));
- return SUCCESS;
- }
- else if (regno >= MOF && regno <= USP) {
- /* 32 bit register with complex offset. */
- *valptr = *(unsigned int *)((char *)&(current_reg->p8)
- + (regno-P8) * sizeof(unsigned int));
- return SUCCESS;
- }
- else {
- /* Do not support nonexisting or unimplemented registers (P2, P3, and P6). */
- consistency_status = E05;
- return E05;
- }
-}
-
/********************************** Packet I/O ******************************/
/* Returns the integer equivalent of a hexadecimal character. */
static int
Put the result in buf, and return a pointer to the last character
in buf (null). */
-static int do_printk = 0;
-
static char *
mem2hex(char *buf, unsigned char *mem, int count)
{
xmitcsum = -1;
count = 0;
/* Read until a # or the end of the buffer is reached */
- while (count < BUFMAX) {
+ while (count < BUFMAX - 1) {
ch = getDebugChar ();
if (ch == '#')
break;
putpacket(remcomOutBuffer);
}
+/********************************* Register image ****************************/
+/* Write a value to a specified register in the register image of the current
+ thread. Returns status code SUCCESS, E02 or E05. */
+static int
+write_register (int regno, char *val)
+{
+ int status = SUCCESS;
+ registers *current_reg = &cris_reg;
+
+ if (regno >= R0 && regno <= PC) {
+ /* 32-bit register with simple offset. */
+ hex2mem ((unsigned char *)current_reg + regno * sizeof(unsigned int),
+ val, sizeof(unsigned int));
+ }
+ else if (regno == P0 || regno == VR || regno == P4 || regno == P8) {
+ /* Do not support read-only registers. */
+ status = E02;
+ }
+ else if (regno == CCR) {
+ /* 16 bit register with complex offset. (P4 is read-only, P6 is not implemented,
+ and P7 (MOF) is 32 bits in ETRAX 100LX. */
+ hex2mem ((unsigned char *)&(current_reg->ccr) + (regno-CCR) * sizeof(unsigned short),
+ val, sizeof(unsigned short));
+ }
+ else if (regno >= MOF && regno <= USP) {
+ /* 32 bit register with complex offset. (P8 has been taken care of.) */
+ hex2mem ((unsigned char *)&(current_reg->ibr) + (regno-IBR) * sizeof(unsigned int),
+ val, sizeof(unsigned int));
+ }
+ else {
+ /* Do not support nonexisting or unimplemented registers (P2, P3, and P6). */
+ status = E05;
+ }
+ return status;
+}
+
+/* Read a value from a specified register in the register image. Returns the
+ value in the register or -1 for non-implemented registers.
+ Should check consistency_status after a call which may be E05 after changes
+ in the implementation. */
+static int
+read_register (char regno, unsigned int *valptr)
+{
+ registers *current_reg = &cris_reg;
+
+ if (regno >= R0 && regno <= PC) {
+ /* 32-bit register with simple offset. */
+ *valptr = *(unsigned int *)((char *)current_reg + regno * sizeof(unsigned int));
+ return SUCCESS;
+ }
+ else if (regno == P0 || regno == VR) {
+ /* 8 bit register with complex offset. */
+ *valptr = (unsigned int)(*(unsigned char *)
+ ((char *)&(current_reg->p0) + (regno-P0) * sizeof(char)));
+ return SUCCESS;
+ }
+ else if (regno == P4 || regno == CCR) {
+ /* 16 bit register with complex offset. */
+ *valptr = (unsigned int)(*(unsigned short *)
+ ((char *)&(current_reg->p4) + (regno-P4) * sizeof(unsigned short)));
+ return SUCCESS;
+ }
+ else if (regno >= MOF && regno <= USP) {
+ /* 32 bit register with complex offset. */
+ *valptr = *(unsigned int *)((char *)&(current_reg->p8)
+ + (regno-P8) * sizeof(unsigned int));
+ return SUCCESS;
+ }
+ else {
+ /* Do not support nonexisting or unimplemented registers (P2, P3, and P6). */
+ consistency_status = E05;
+ return E05;
+ }
+}
+
/********************************** Handle exceptions ************************/
/* Build and send a response packet in order to inform the host the
stub is stopped. TAAn...:r...;n...:r...;n...:r...;
}
-#ifdef PROCESS_SUPPORT
- /* Store the registers of the executing thread. Assume that both step,
- continue, and register content requests are with respect to this
- thread. The executing task is from the operating system scheduler. */
-
- current_thread_c = executing_task;
- current_thread_g = executing_task;
-
- /* A struct assignment translates into a libc memcpy call. Avoid
- all libc functions in order to prevent recursive break points. */
- copy_registers (®_g, ®, sizeof(registers));
-
- /* Store thread:r...; with the executing task TID. */
- gdb_cris_strcpy (&remcomOutBuffer[pos], "thread:");
- pos += gdb_cris_strlen ("thread:");
- remcomOutBuffer[pos++] = hex_asc_hi(executing_task);
- remcomOutBuffer[pos++] = hex_asc_lo(executing_task);
- gdb_cris_strcpy (&remcomOutBuffer[pos], ";");
-#endif
-
/* null-terminate and send it off */
*ptr = 0;
putpacket (remcomOutBuffer);
}
+/* Performs a complete re-start from scratch. */
+static void
+kill_restart (void)
+{
+ machine_restart("");
+}
+
/* All expected commands are sent from remote.c. Send a response according
to the description in remote.c. */
-static void
+void
handle_exception (int sigval)
{
- /* Avoid warning of not used. */
-
- USEDFUN(handle_exception);
- USEDVAR(internal_stack[0]);
-
/* Send response. */
stub_is_stopped (sigval);
in a register are in the same order the machine uses.
Failure: void. */
- {
-#ifdef PROCESS_SUPPORT
- /* Use the special register content in the executing thread. */
- copy_registers (®_g, ®, sizeof(registers));
- /* Replace the content available on the stack. */
- if (current_thread_g != executing_task) {
- copy_registers_from_stack (current_thread_g, ®_g);
- }
- mem2hex ((unsigned char *)remcomOutBuffer, (unsigned char *)®_g, sizeof(registers));
-#else
- mem2hex(remcomOutBuffer, (char *)®, sizeof(registers));
-#endif
- }
+ mem2hex(remcomOutBuffer, (char *)&cris_reg, sizeof(registers));
break;
case 'G':
Each byte of register data is described by two hex digits.
Success: OK
Failure: void. */
-#ifdef PROCESS_SUPPORT
- hex2mem ((unsigned char *)®_g, &remcomInBuffer[1], sizeof(registers));
- if (current_thread_g == executing_task) {
- copy_registers (®, ®_g, sizeof(registers));
- }
- else {
- copy_registers_to_stack(current_thread_g, ®_g);
- }
-#else
- hex2mem((char *)®, &remcomInBuffer[1], sizeof(registers));
-#endif
+ hex2mem((char *)&cris_reg, &remcomInBuffer[1], sizeof(registers));
gdb_cris_strcpy (remcomOutBuffer, "OK");
break;
char *suffix;
int regno = gdb_cris_strtol (&remcomInBuffer[1], &suffix, 16);
int status;
-#ifdef PROCESS_SUPPORT
- if (current_thread_g != executing_task)
- status = write_stack_register (current_thread_g, regno, suffix+1);
- else
-#endif
- status = write_register (regno, suffix+1);
+ status = write_register (regno, suffix+1);
switch (status) {
case E02:
Success: return to the executing thread.
Failure: will never know. */
if (remcomInBuffer[1] != '\0') {
- reg.pc = gdb_cris_strtol (&remcomInBuffer[1], 0, 16);
+ cris_reg.pc = gdb_cris_strtol (&remcomInBuffer[1], 0, 16);
}
enableDebugIRQ();
return;
Not supported: E04 */
gdb_cris_strcpy (remcomOutBuffer, error_message[E04]);
break;
-#ifdef PROCESS_SUPPORT
-
- case 'T':
- /* Thread alive. TXX
- Is thread XX alive?
- Success: OK, thread XX is alive.
- Failure: E03, thread XX is dead. */
- {
- int thread_id = (int)gdb_cris_strtol (&remcomInBuffer[1], 0, 16);
- /* Cannot tell whether it is alive or not. */
- if (thread_id >= 0 && thread_id < number_of_tasks)
- gdb_cris_strcpy (remcomOutBuffer, "OK");
- }
- break;
-
- case 'H':
- /* Set thread for subsequent operations: Hct
- c = 'c' for thread used in step and continue;
- t can be -1 for all threads.
- c = 'g' for thread used in other operations.
- t = 0 means pick any thread.
- Success: OK
- Failure: E01 */
- {
- int thread_id = gdb_cris_strtol (&remcomInBuffer[2], 0, 16);
- if (remcomInBuffer[1] == 'c') {
- /* c = 'c' for thread used in step and continue */
- /* Do not change current_thread_c here. It would create a mess in
- the scheduler. */
- gdb_cris_strcpy (remcomOutBuffer, "OK");
- }
- else if (remcomInBuffer[1] == 'g') {
- /* c = 'g' for thread used in other operations.
- t = 0 means pick any thread. Impossible since the scheduler does
- not allow that. */
- if (thread_id >= 0 && thread_id < number_of_tasks) {
- current_thread_g = thread_id;
- gdb_cris_strcpy (remcomOutBuffer, "OK");
- }
- else {
- /* Not expected - send an error message. */
- gdb_cris_strcpy (remcomOutBuffer, error_message[E01]);
- }
- }
- else {
- /* Not expected - send an error message. */
- gdb_cris_strcpy (remcomOutBuffer, error_message[E01]);
- }
- }
- break;
-
- case 'q':
- case 'Q':
- /* Query of general interest. qXXXX
- Set general value XXXX. QXXXX=yyyy */
- {
- int pos;
- int nextpos;
- int thread_id;
-
- switch (remcomInBuffer[1]) {
- case 'C':
- /* Identify the remote current thread. */
- gdb_cris_strcpy (&remcomOutBuffer[0], "QC");
- remcomOutBuffer[2] = hex_asc_hi(current_thread_c);
- remcomOutBuffer[3] = hex_asc_lo(current_thread_c);
- remcomOutBuffer[4] = '\0';
- break;
- case 'L':
- gdb_cris_strcpy (&remcomOutBuffer[0], "QM");
- /* Reply with number of threads. */
- if (os_is_started()) {
- remcomOutBuffer[2] = hex_asc_hi(number_of_tasks);
- remcomOutBuffer[3] = hex_asc_lo(number_of_tasks);
- }
- else {
- remcomOutBuffer[2] = hex_asc_hi(0);
- remcomOutBuffer[3] = hex_asc_lo(1);
- }
- /* Done with the reply. */
- remcomOutBuffer[4] = hex_asc_lo(1);
- pos = 5;
- /* Expects the argument thread id. */
- for (; pos < (5 + HEXCHARS_IN_THREAD_ID); pos++)
- remcomOutBuffer[pos] = remcomInBuffer[pos];
- /* Reply with the thread identifiers. */
- if (os_is_started()) {
- /* Store the thread identifiers of all tasks. */
- for (thread_id = 0; thread_id < number_of_tasks; thread_id++) {
- nextpos = pos + HEXCHARS_IN_THREAD_ID - 1;
- for (; pos < nextpos; pos ++)
- remcomOutBuffer[pos] = hex_asc_lo(0);
- remcomOutBuffer[pos++] = hex_asc_lo(thread_id);
- }
- }
- else {
- /* Store the thread identifier of the boot task. */
- nextpos = pos + HEXCHARS_IN_THREAD_ID - 1;
- for (; pos < nextpos; pos ++)
- remcomOutBuffer[pos] = hex_asc_lo(0);
- remcomOutBuffer[pos++] = hex_asc_lo(current_thread_c);
- }
- remcomOutBuffer[pos] = '\0';
- break;
- default:
- /* Not supported: "" */
- /* Request information about section offsets: qOffsets. */
- remcomOutBuffer[0] = 0;
- break;
- }
- }
- break;
-#endif /* PROCESS_SUPPORT */
default:
/* The stub should ignore other request and send an empty
}
}
-/* Performs a complete re-start from scratch. */
-static void
-kill_restart ()
-{
- machine_restart("");
-}
-
/********************************** Breakpoint *******************************/
/* The hook for both a static (compiled) and a dynamic breakpoint set by GDB.
An internal stack is used by the stub. The register image of the caller is
void kgdb_handle_breakpoint(void);
-asm ("
- .global kgdb_handle_breakpoint
-kgdb_handle_breakpoint:
-;;
-;; Response to the break-instruction
-;;
-;; Create a register image of the caller
-;;
- move $dccr,[reg+0x5E] ; Save the flags in DCCR before disable interrupts
- di ; Disable interrupts
- move.d $r0,[reg] ; Save R0
- move.d $r1,[reg+0x04] ; Save R1
- move.d $r2,[reg+0x08] ; Save R2
- move.d $r3,[reg+0x0C] ; Save R3
- move.d $r4,[reg+0x10] ; Save R4
- move.d $r5,[reg+0x14] ; Save R5
- move.d $r6,[reg+0x18] ; Save R6
- move.d $r7,[reg+0x1C] ; Save R7
- move.d $r8,[reg+0x20] ; Save R8
- move.d $r9,[reg+0x24] ; Save R9
- move.d $r10,[reg+0x28] ; Save R10
- move.d $r11,[reg+0x2C] ; Save R11
- move.d $r12,[reg+0x30] ; Save R12
- move.d $r13,[reg+0x34] ; Save R13
- move.d $sp,[reg+0x38] ; Save SP (R14)
-;; Due to the old assembler-versions BRP might not be recognized
- .word 0xE670 ; move brp,$r0
- subq 2,$r0 ; Set to address of previous instruction.
- move.d $r0,[reg+0x3c] ; Save the address in PC (R15)
- clear.b [reg+0x40] ; Clear P0
- move $vr,[reg+0x41] ; Save special register P1
- clear.w [reg+0x42] ; Clear P4
- move $ccr,[reg+0x44] ; Save special register CCR
- move $mof,[reg+0x46] ; P7
- clear.d [reg+0x4A] ; Clear P8
- move $ibr,[reg+0x4E] ; P9,
- move $irp,[reg+0x52] ; P10,
- move $srp,[reg+0x56] ; P11,
- move $dtp0,[reg+0x5A] ; P12, register BAR, assembler might not know BAR
- ; P13, register DCCR already saved
-;; Due to the old assembler-versions BRP might not be recognized
- .word 0xE670 ; move brp,r0
-;; Static (compiled) breakpoints must return to the next instruction in order
-;; to avoid infinite loops. Dynamic (gdb-invoked) must restore the instruction
-;; in order to execute it when execution is continued.
- test.b [is_dyn_brkp] ; Is this a dynamic breakpoint?
- beq is_static ; No, a static breakpoint
- nop
- subq 2,$r0 ; rerun the instruction the break replaced
-is_static:
- moveq 1,$r1
- move.b $r1,[is_dyn_brkp] ; Set the state variable to dynamic breakpoint
- move.d $r0,[reg+0x62] ; Save the return address in BRP
- move $usp,[reg+0x66] ; USP
-;;
-;; Handle the communication
-;;
- move.d internal_stack+1020,$sp ; Use the internal stack which grows upward
- moveq 5,$r10 ; SIGTRAP
- jsr handle_exception ; Interactive routine
-;;
-;; Return to the caller
-;;
- move.d [reg],$r0 ; Restore R0
- move.d [reg+0x04],$r1 ; Restore R1
- move.d [reg+0x08],$r2 ; Restore R2
- move.d [reg+0x0C],$r3 ; Restore R3
- move.d [reg+0x10],$r4 ; Restore R4
- move.d [reg+0x14],$r5 ; Restore R5
- move.d [reg+0x18],$r6 ; Restore R6
- move.d [reg+0x1C],$r7 ; Restore R7
- move.d [reg+0x20],$r8 ; Restore R8
- move.d [reg+0x24],$r9 ; Restore R9
- move.d [reg+0x28],$r10 ; Restore R10
- move.d [reg+0x2C],$r11 ; Restore R11
- move.d [reg+0x30],$r12 ; Restore R12
- move.d [reg+0x34],$r13 ; Restore R13
-;;
-;; FIXME: Which registers should be restored?
-;;
- move.d [reg+0x38],$sp ; Restore SP (R14)
- move [reg+0x56],$srp ; Restore the subroutine return pointer.
- move [reg+0x5E],$dccr ; Restore DCCR
- move [reg+0x66],$usp ; Restore USP
- jump [reg+0x62] ; A jump to the content in register BRP works.
- nop ;
-");
+asm ("\n"
+" .global kgdb_handle_breakpoint\n"
+"kgdb_handle_breakpoint:\n"
+";;\n"
+";; Response to the break-instruction\n"
+";;\n"
+";; Create a register image of the caller\n"
+";;\n"
+" move $dccr,[cris_reg+0x5E] ; Save the flags in DCCR before disable interrupts\n"
+" di ; Disable interrupts\n"
+" move.d $r0,[cris_reg] ; Save R0\n"
+" move.d $r1,[cris_reg+0x04] ; Save R1\n"
+" move.d $r2,[cris_reg+0x08] ; Save R2\n"
+" move.d $r3,[cris_reg+0x0C] ; Save R3\n"
+" move.d $r4,[cris_reg+0x10] ; Save R4\n"
+" move.d $r5,[cris_reg+0x14] ; Save R5\n"
+" move.d $r6,[cris_reg+0x18] ; Save R6\n"
+" move.d $r7,[cris_reg+0x1C] ; Save R7\n"
+" move.d $r8,[cris_reg+0x20] ; Save R8\n"
+" move.d $r9,[cris_reg+0x24] ; Save R9\n"
+" move.d $r10,[cris_reg+0x28] ; Save R10\n"
+" move.d $r11,[cris_reg+0x2C] ; Save R11\n"
+" move.d $r12,[cris_reg+0x30] ; Save R12\n"
+" move.d $r13,[cris_reg+0x34] ; Save R13\n"
+" move.d $sp,[cris_reg+0x38] ; Save SP (R14)\n"
+";; Due to the old assembler-versions BRP might not be recognized\n"
+" .word 0xE670 ; move brp,$r0\n"
+" subq 2,$r0 ; Set to address of previous instruction.\n"
+" move.d $r0,[cris_reg+0x3c] ; Save the address in PC (R15)\n"
+" clear.b [cris_reg+0x40] ; Clear P0\n"
+" move $vr,[cris_reg+0x41] ; Save special register P1\n"
+" clear.w [cris_reg+0x42] ; Clear P4\n"
+" move $ccr,[cris_reg+0x44] ; Save special register CCR\n"
+" move $mof,[cris_reg+0x46] ; P7\n"
+" clear.d [cris_reg+0x4A] ; Clear P8\n"
+" move $ibr,[cris_reg+0x4E] ; P9,\n"
+" move $irp,[cris_reg+0x52] ; P10,\n"
+" move $srp,[cris_reg+0x56] ; P11,\n"
+" move $dtp0,[cris_reg+0x5A] ; P12, register BAR, assembler might not know BAR\n"
+" ; P13, register DCCR already saved\n"
+";; Due to the old assembler-versions BRP might not be recognized\n"
+" .word 0xE670 ; move brp,r0\n"
+";; Static (compiled) breakpoints must return to the next instruction in order\n"
+";; to avoid infinite loops. Dynamic (gdb-invoked) must restore the instruction\n"
+";; in order to execute it when execution is continued.\n"
+" test.b [is_dyn_brkp] ; Is this a dynamic breakpoint?\n"
+" beq is_static ; No, a static breakpoint\n"
+" nop\n"
+" subq 2,$r0 ; rerun the instruction the break replaced\n"
+"is_static:\n"
+" moveq 1,$r1\n"
+" move.b $r1,[is_dyn_brkp] ; Set the state variable to dynamic breakpoint\n"
+" move.d $r0,[cris_reg+0x62] ; Save the return address in BRP\n"
+" move $usp,[cris_reg+0x66] ; USP\n"
+";;\n"
+";; Handle the communication\n"
+";;\n"
+" move.d internal_stack+1020,$sp ; Use the internal stack which grows upward\n"
+" moveq 5,$r10 ; SIGTRAP\n"
+" jsr handle_exception ; Interactive routine\n"
+";;\n"
+";; Return to the caller\n"
+";;\n"
+" move.d [cris_reg],$r0 ; Restore R0\n"
+" move.d [cris_reg+0x04],$r1 ; Restore R1\n"
+" move.d [cris_reg+0x08],$r2 ; Restore R2\n"
+" move.d [cris_reg+0x0C],$r3 ; Restore R3\n"
+" move.d [cris_reg+0x10],$r4 ; Restore R4\n"
+" move.d [cris_reg+0x14],$r5 ; Restore R5\n"
+" move.d [cris_reg+0x18],$r6 ; Restore R6\n"
+" move.d [cris_reg+0x1C],$r7 ; Restore R7\n"
+" move.d [cris_reg+0x20],$r8 ; Restore R8\n"
+" move.d [cris_reg+0x24],$r9 ; Restore R9\n"
+" move.d [cris_reg+0x28],$r10 ; Restore R10\n"
+" move.d [cris_reg+0x2C],$r11 ; Restore R11\n"
+" move.d [cris_reg+0x30],$r12 ; Restore R12\n"
+" move.d [cris_reg+0x34],$r13 ; Restore R13\n"
+";;\n"
+";; FIXME: Which registers should be restored?\n"
+";;\n"
+" move.d [cris_reg+0x38],$sp ; Restore SP (R14)\n"
+" move [cris_reg+0x56],$srp ; Restore the subroutine return pointer.\n"
+" move [cris_reg+0x5E],$dccr ; Restore DCCR\n"
+" move [cris_reg+0x66],$usp ; Restore USP\n"
+" jump [cris_reg+0x62] ; A jump to the content in register BRP works.\n"
+" nop ;\n"
+"\n");
/* The hook for an interrupt generated by GDB. An internal stack is used
by the stub. The register image of the caller is stored in the structure
void kgdb_handle_serial(void);
-asm ("
- .global kgdb_handle_serial
-kgdb_handle_serial:
-;;
-;; Response to a serial interrupt
-;;
-
- move $dccr,[reg+0x5E] ; Save the flags in DCCR
- di ; Disable interrupts
- move.d $r0,[reg] ; Save R0
- move.d $r1,[reg+0x04] ; Save R1
- move.d $r2,[reg+0x08] ; Save R2
- move.d $r3,[reg+0x0C] ; Save R3
- move.d $r4,[reg+0x10] ; Save R4
- move.d $r5,[reg+0x14] ; Save R5
- move.d $r6,[reg+0x18] ; Save R6
- move.d $r7,[reg+0x1C] ; Save R7
- move.d $r8,[reg+0x20] ; Save R8
- move.d $r9,[reg+0x24] ; Save R9
- move.d $r10,[reg+0x28] ; Save R10
- move.d $r11,[reg+0x2C] ; Save R11
- move.d $r12,[reg+0x30] ; Save R12
- move.d $r13,[reg+0x34] ; Save R13
- move.d $sp,[reg+0x38] ; Save SP (R14)
- move $irp,[reg+0x3c] ; Save the address in PC (R15)
- clear.b [reg+0x40] ; Clear P0
- move $vr,[reg+0x41] ; Save special register P1,
- clear.w [reg+0x42] ; Clear P4
- move $ccr,[reg+0x44] ; Save special register CCR
- move $mof,[reg+0x46] ; P7
- clear.d [reg+0x4A] ; Clear P8
- move $ibr,[reg+0x4E] ; P9,
- move $irp,[reg+0x52] ; P10,
- move $srp,[reg+0x56] ; P11,
- move $dtp0,[reg+0x5A] ; P12, register BAR, assembler might not know BAR
- ; P13, register DCCR already saved
-;; Due to the old assembler-versions BRP might not be recognized
- .word 0xE670 ; move brp,r0
- move.d $r0,[reg+0x62] ; Save the return address in BRP
- move $usp,[reg+0x66] ; USP
-
-;; get the serial character (from debugport.c) and check if it is a ctrl-c
-
- jsr getDebugChar
- cmp.b 3, $r10
- bne goback
- nop
-
- move.d [reg+0x5E], $r10 ; Get DCCR
- btstq 8, $r10 ; Test the U-flag.
- bmi goback
- nop
-
-;;
-;; Handle the communication
-;;
- move.d internal_stack+1020,$sp ; Use the internal stack
- moveq 2,$r10 ; SIGINT
- jsr handle_exception ; Interactive routine
-
-goback:
-;;
-;; Return to the caller
-;;
- move.d [reg],$r0 ; Restore R0
- move.d [reg+0x04],$r1 ; Restore R1
- move.d [reg+0x08],$r2 ; Restore R2
- move.d [reg+0x0C],$r3 ; Restore R3
- move.d [reg+0x10],$r4 ; Restore R4
- move.d [reg+0x14],$r5 ; Restore R5
- move.d [reg+0x18],$r6 ; Restore R6
- move.d [reg+0x1C],$r7 ; Restore R7
- move.d [reg+0x20],$r8 ; Restore R8
- move.d [reg+0x24],$r9 ; Restore R9
- move.d [reg+0x28],$r10 ; Restore R10
- move.d [reg+0x2C],$r11 ; Restore R11
- move.d [reg+0x30],$r12 ; Restore R12
- move.d [reg+0x34],$r13 ; Restore R13
-;;
-;; FIXME: Which registers should be restored?
-;;
- move.d [reg+0x38],$sp ; Restore SP (R14)
- move [reg+0x56],$srp ; Restore the subroutine return pointer.
- move [reg+0x5E],$dccr ; Restore DCCR
- move [reg+0x66],$usp ; Restore USP
- reti ; Return from the interrupt routine
- nop
-");
+asm ("\n"
+" .global kgdb_handle_serial\n"
+"kgdb_handle_serial:\n"
+";;\n"
+";; Response to a serial interrupt\n"
+";;\n"
+"\n"
+" move $dccr,[cris_reg+0x5E] ; Save the flags in DCCR\n"
+" di ; Disable interrupts\n"
+" move.d $r0,[cris_reg] ; Save R0\n"
+" move.d $r1,[cris_reg+0x04] ; Save R1\n"
+" move.d $r2,[cris_reg+0x08] ; Save R2\n"
+" move.d $r3,[cris_reg+0x0C] ; Save R3\n"
+" move.d $r4,[cris_reg+0x10] ; Save R4\n"
+" move.d $r5,[cris_reg+0x14] ; Save R5\n"
+" move.d $r6,[cris_reg+0x18] ; Save R6\n"
+" move.d $r7,[cris_reg+0x1C] ; Save R7\n"
+" move.d $r8,[cris_reg+0x20] ; Save R8\n"
+" move.d $r9,[cris_reg+0x24] ; Save R9\n"
+" move.d $r10,[cris_reg+0x28] ; Save R10\n"
+" move.d $r11,[cris_reg+0x2C] ; Save R11\n"
+" move.d $r12,[cris_reg+0x30] ; Save R12\n"
+" move.d $r13,[cris_reg+0x34] ; Save R13\n"
+" move.d $sp,[cris_reg+0x38] ; Save SP (R14)\n"
+" move $irp,[cris_reg+0x3c] ; Save the address in PC (R15)\n"
+" clear.b [cris_reg+0x40] ; Clear P0\n"
+" move $vr,[cris_reg+0x41] ; Save special register P1,\n"
+" clear.w [cris_reg+0x42] ; Clear P4\n"
+" move $ccr,[cris_reg+0x44] ; Save special register CCR\n"
+" move $mof,[cris_reg+0x46] ; P7\n"
+" clear.d [cris_reg+0x4A] ; Clear P8\n"
+" move $ibr,[cris_reg+0x4E] ; P9,\n"
+" move $irp,[cris_reg+0x52] ; P10,\n"
+" move $srp,[cris_reg+0x56] ; P11,\n"
+" move $dtp0,[cris_reg+0x5A] ; P12, register BAR, assembler might not know BAR\n"
+" ; P13, register DCCR already saved\n"
+";; Due to the old assembler-versions BRP might not be recognized\n"
+" .word 0xE670 ; move brp,r0\n"
+" move.d $r0,[cris_reg+0x62] ; Save the return address in BRP\n"
+" move $usp,[cris_reg+0x66] ; USP\n"
+"\n"
+";; get the serial character (from debugport.c) and check if it is a ctrl-c\n"
+"\n"
+" jsr getDebugChar\n"
+" cmp.b 3, $r10\n"
+" bne goback\n"
+" nop\n"
+"\n"
+" move.d [cris_reg+0x5E], $r10 ; Get DCCR\n"
+" btstq 8, $r10 ; Test the U-flag.\n"
+" bmi goback\n"
+" nop\n"
+"\n"
+";;\n"
+";; Handle the communication\n"
+";;\n"
+" move.d internal_stack+1020,$sp ; Use the internal stack\n"
+" moveq 2,$r10 ; SIGINT\n"
+" jsr handle_exception ; Interactive routine\n"
+"\n"
+"goback:\n"
+";;\n"
+";; Return to the caller\n"
+";;\n"
+" move.d [cris_reg],$r0 ; Restore R0\n"
+" move.d [cris_reg+0x04],$r1 ; Restore R1\n"
+" move.d [cris_reg+0x08],$r2 ; Restore R2\n"
+" move.d [cris_reg+0x0C],$r3 ; Restore R3\n"
+" move.d [cris_reg+0x10],$r4 ; Restore R4\n"
+" move.d [cris_reg+0x14],$r5 ; Restore R5\n"
+" move.d [cris_reg+0x18],$r6 ; Restore R6\n"
+" move.d [cris_reg+0x1C],$r7 ; Restore R7\n"
+" move.d [cris_reg+0x20],$r8 ; Restore R8\n"
+" move.d [cris_reg+0x24],$r9 ; Restore R9\n"
+" move.d [cris_reg+0x28],$r10 ; Restore R10\n"
+" move.d [cris_reg+0x2C],$r11 ; Restore R11\n"
+" move.d [cris_reg+0x30],$r12 ; Restore R12\n"
+" move.d [cris_reg+0x34],$r13 ; Restore R13\n"
+";;\n"
+";; FIXME: Which registers should be restored?\n"
+";;\n"
+" move.d [cris_reg+0x38],$sp ; Restore SP (R14)\n"
+" move [cris_reg+0x56],$srp ; Restore the subroutine return pointer.\n"
+" move [cris_reg+0x5E],$dccr ; Restore DCCR\n"
+" move [cris_reg+0x66],$usp ; Restore USP\n"
+" reti ; Return from the interrupt routine\n"
+" nop\n"
+"\n");
/* Use this static breakpoint in the start-up only. */
projects / karo-tx-linux.git / blobdiff