[PATCH 08/10] [RFC] cris/kgdb: Remove sections protected by #ifdef PROCESS_SUPPORT

From: Geert Uytterhoeven
Date: Tue Feb 12 2013 - 09:53:16 EST

When enabled, it doesn't build anyway:

arch/cris/arch-v10/kernel/kgdb.c: In function 'copy_registers_from_stack':
arch/cris/arch-v10/kernel/kgdb.c:631:2: error: unknown type name 'stack_registers'
arch/cris/arch-v10/kernel/kgdb.c:631:24: error: 'stack_registers' undeclared (first use in this function)
arch/cris/arch-v10/kernel/kgdb.c:631:24: note: each undeclared identifier is reported only once for each function it appears in
arch/cris/arch-v10/kernel/kgdb.c:631:41: error: expected expression before ')' token
arch/cris/arch-v10/kernel/kgdb.c:635:11: error: request for member 'r' in something not a structure or union
arch/cris/arch-v10/kernel/kgdb.c:636:29: error: 'stack_list' undeclared (first use in this function)
arch/cris/arch-v10/kernel/kgdb.c:637:16: error: request for member 'pc' in something not a structure or union
arch/cris/arch-v10/kernel/kgdb.c:638:18: error: request for member 'dccr' in something not a structure or union
arch/cris/arch-v10/kernel/kgdb.c:639:17: error: request for member 'srp' in something not a structure or union
arch/cris/arch-v10/kernel/kgdb.c: In function 'copy_registers_to_stack':
arch/cris/arch-v10/kernel/kgdb.c:648:2: error: unknown type name 'stack_registers'
arch/cris/arch-v10/kernel/kgdb.c:648:24: error: 'stack_registers' undeclared (first use in this function)
arch/cris/arch-v10/kernel/kgdb.c:648:41: error: expected expression before ')' token
arch/cris/arch-v10/kernel/kgdb.c:652:4: error: request for member 'r' in something not a structure or union
arch/cris/arch-v10/kernel/kgdb.c:654:3: error: request for member 'pc' in something not a structure or union
arch/cris/arch-v10/kernel/kgdb.c:655:3: error: request for member 'dccr' in something not a structure or union
arch/cris/arch-v10/kernel/kgdb.c:656:3: error: request for member 'srp' in something not a structure or union
arch/cris/arch-v10/kernel/kgdb.c: In function 'write_stack_register':
arch/cris/arch-v10/kernel/kgdb.c:702:2: error: unknown type name 'stack_registers'
arch/cris/arch-v10/kernel/kgdb.c:702:24: error: 'stack_registers' undeclared (first use in this function)
arch/cris/arch-v10/kernel/kgdb.c:702:41: error: expected expression before ')' token
arch/cris/arch-v10/kernel/kgdb.c:707:4: error: request for member 'r' in something not a structure or union
arch/cris/arch-v10/kernel/kgdb.c:710:3: error: 'stack_list' undeclared (first use in this function)
arch/cris/arch-v10/kernel/kgdb.c:713:4: error: request for member 'pc' in something not a structure or union
arch/cris/arch-v10/kernel/kgdb.c:716:4: error: request for member 'srp' in something not a structure or union
arch/cris/arch-v10/kernel/kgdb.c:719:4: error: request for member 'dccr' in something not a structure or union
arch/cris/arch-v10/kernel/kgdb.c: In function 'stub_is_stopped':
arch/cris/arch-v10/kernel/kgdb.c:827:36: error: 'pos' undeclared (first use in this function)
arch/cris/arch-v10/kernel/kgdb.c: In function 'handle_exception':
arch/cris/arch-v10/kernel/kgdb.c:1064:40: error: 'number_of_tasks' undeclared (first use in this function)
arch/cris/arch-v10/kernel/kgdb.c:1125:8: error: implicit declaration of function 'os_is_started' [-Werror=implicit-function-declaration]

Signed-off-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
---
arch/cris/arch-v10/kernel/kgdb.c | 257 +-------------------------------------
1 files changed, 2 insertions(+), 255 deletions(-)

diff --git a/arch/cris/arch-v10/kernel/kgdb.c b/arch/cris/arch-v10/kernel/kgdb.c
index 0e79907..22d846b 100644
--- a/arch/cris/arch-v10/kernel/kgdb.c
+++ b/arch/cris/arch-v10/kernel/kgdb.c
@@ -341,16 +341,6 @@ static int consistency_status = SUCCESS;
in order to provide access mainly for 'g', 'G' and 'P'.
*/

-#ifdef PROCESS_SUPPORT
-/* 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 cris_reg above. */
-static registers reg_g;
-#endif /* PROCESS_SUPPORT */
-
/********************************** Breakpoint *******************************/
/* Use an internal stack in the breakpoint and interrupt response routines */
#define INTERNAL_STACK_SIZE 1024
@@ -608,55 +598,6 @@ putDebugString (const unsigned char *str, int length)
}

/********************************* Register image ****************************/
-#ifdef PROCESS_SUPPORT
-/* 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++;
-}
-
-/* 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
@@ -692,40 +633,6 @@ write_register (int regno, char *val)
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
@@ -811,26 +718,6 @@ stub_is_stopped(int sigval)

}

-#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 (&reg_g, &cris_reg, 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;
@@ -865,19 +752,7 @@ handle_exception (int 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 (&reg_g, &cris_reg, sizeof(registers));
- /* Replace the content available on the stack. */
- if (current_thread_g != executing_task) {
- copy_registers_from_stack (current_thread_g, &reg_g);
- }
- mem2hex ((unsigned char *)remcomOutBuffer, (unsigned char *)&reg_g, sizeof(registers));
-#else
- mem2hex(remcomOutBuffer, (char *)&cris_reg, sizeof(registers));
-#endif
- }
+ mem2hex(remcomOutBuffer, (char *)&cris_reg, sizeof(registers));
break;

case 'G':
@@ -885,17 +760,7 @@ handle_exception (int sigval)
Each byte of register data is described by two hex digits.
Success: OK
Failure: void. */
-#ifdef PROCESS_SUPPORT
- hex2mem ((unsigned char *)&reg_g, &remcomInBuffer[1], sizeof(registers));
- if (current_thread_g == executing_task) {
- copy_registers (&cris_reg, &reg_g, sizeof(registers));
- }
- else {
- copy_registers_to_stack(current_thread_g, &reg_g);
- }
-#else
hex2mem((char *)&cris_reg, &remcomInBuffer[1], sizeof(registers));
-#endif
gdb_cris_strcpy (remcomOutBuffer, "OK");
break;

@@ -911,12 +776,7 @@ handle_exception (int sigval)
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:
@@ -1051,119 +911,6 @@ handle_exception (int sigval)
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
--
1.7.0.4

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