cris: kgdb: use native hex2bin

There are kernel native helpers to convert hex ascii to the binary format:
hex_to_bin() and hex2bin(). Thus, no need to reimplement them customly.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Jesper Nilsson <jespern@axis.com>

1 files changed, 33 insertions, 50 deletions

diff --git a/arch/cris/arch-v10/kernel/kgdb.c b/arch/cris/arch-v10/kernel/kgdb.c
index 22d846bfc570..6b7616476af5 100644
--- a/arch/cris/arch-v10/kernel/kgdb.c
+++ b/arch/cris/arch-v10/kernel/kgdb.c
@@ -275,7 +275,7 @@ static char remcomOutBuffer[BUFMAX];
 /* Error and warning messages. */
 enum error_type
 {
-	SUCCESS, E01, E02, E03, E04, E05, E06, E07
+	SUCCESS, E01, E02, E03, E04, E05, E06, E07, E08
 };
 static char *error_message[] =
 {
@@ -286,7 +286,8 @@ static char *error_message[] =
 	"E04 The command is not supported - [s,C,S,!,R,d,r] - internal error.",
 	"E05 Change register content - P - the register is not implemented..",
 	"E06 Change memory content - M - internal error.",
-	"E07 Change register content - P - the register is not stored on the stack"
+	"E07 Change register content - P - the register is not stored on the stack",
+	"E08 Invalid parameter"
 };
 /********************************* Register image ****************************/
 /* Use the order of registers as defined in "AXIS ETRAX CRIS Programmer's
@@ -413,18 +414,6 @@ gdb_cris_strtol (const char *s, char **endptr, int base)
 }
 
 /********************************** Packet I/O ******************************/
-/* Returns the integer equivalent of a hexadecimal character. */
-static int
-hex (char ch)
-{
-	if ((ch >= 'a') && (ch <= 'f'))
-		return (ch - 'a' + 10);
-	if ((ch >= '0') && (ch <= '9'))
-		return (ch - '0');
-	if ((ch >= 'A') && (ch <= 'F'))
-		return (ch - 'A' + 10);
-	return (-1);
-}
 
 /* Convert the memory, pointed to by mem into hexadecimal representation.
    Put the result in buf, and return a pointer to the last character
@@ -455,22 +444,6 @@ mem2hex(char *buf, unsigned char *mem, int count)
 	return (buf);
 }
 
-/* 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)
-{
-	int i;
-	unsigned char ch;
-	for (i = 0; i < count; i++) {
-		ch = hex (*buf++) << 4;
-		ch = ch + hex (*buf++);
-		*mem++ = ch;
-	}
-	return (mem);
-}
-
 /* 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.
@@ -524,8 +497,8 @@ getpacket (char *buffer)
 		buffer[count] = '\0';
 		
 		if (ch == '#') {
-			xmitcsum = hex (getDebugChar ()) << 4;
-			xmitcsum += hex (getDebugChar ());
+			xmitcsum = hex_to_bin(getDebugChar()) << 4;
+			xmitcsum += hex_to_bin(getDebugChar());
 			if (checksum != xmitcsum) {
 				/* Wrong checksum */
 				putDebugChar ('-');
@@ -599,7 +572,7 @@ putDebugString (const unsigned char *str, int length)
 
 /********************************* Register image ****************************/
 /* Write a value to a specified register in the register image of the current
-   thread. Returns status code SUCCESS, E02 or E05. */
+   thread. Returns status code SUCCESS, E02, E05 or E08. */
 static int
 write_register (int regno, char *val)
 {
@@ -608,8 +581,9 @@ write_register (int regno, char *val)
 
         if (regno >= R0 && regno <= PC) {
 		/* 32-bit register with simple offset. */
-		hex2mem ((unsigned char *)current_reg + regno * sizeof(unsigned int),
-			 val, sizeof(unsigned int));
+		if (hex2bin((unsigned char *)current_reg + regno * sizeof(unsigned int),
+			    val, sizeof(unsigned int)))
+			status = E08;
 	}
         else if (regno == P0 || regno == VR || regno == P4 || regno == P8) {
 		/* Do not support read-only registers. */
@@ -618,13 +592,15 @@ write_register (int regno, char *val)
         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));
+		if (hex2bin((unsigned char *)&(current_reg->ccr) + (regno-CCR) * sizeof(unsigned short),
+			    val, sizeof(unsigned short)))
+			status = E08;
 	}
 	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));
+		if (hex2bin((unsigned char *)&(current_reg->ibr) + (regno-IBR) * sizeof(unsigned int),
+			    val, sizeof(unsigned int)))
+			status = E08;
 	} 
         else {
 		/* Do not support nonexisting or unimplemented registers (P2, P3, and P6). */
@@ -759,9 +735,11 @@ handle_exception (int sigval)
 				/* Write registers. GXX..XX
 				   Each byte of register data  is described by two hex digits.
 				   Success: OK
-				   Failure: void. */
-				hex2mem((char *)&cris_reg, &remcomInBuffer[1], sizeof(registers));
-				gdb_cris_strcpy (remcomOutBuffer, "OK");
+				   Failure: E08. */
+				if (hex2bin((char *)&cris_reg, &remcomInBuffer[1], sizeof(registers)))
+					gdb_cris_strcpy (remcomOutBuffer, error_message[E08]);
+				else
+					gdb_cris_strcpy (remcomOutBuffer, "OK");
 				break;
 				
 			case 'P':
@@ -771,7 +749,7 @@ handle_exception (int sigval)
 				   for each byte in the register (target byte order). P1f=11223344 means
 				   set register 31 to 44332211.
 				   Success: OK
-				   Failure: E02, E05 */
+				   Failure: E02, E05, E08 */
 				{
 					char *suffix;
 					int regno = gdb_cris_strtol (&remcomInBuffer[1], &suffix, 16);
@@ -791,6 +769,10 @@ handle_exception (int sigval)
 							/* Do not support non-existing registers on the stack. */
 							gdb_cris_strcpy (remcomOutBuffer, error_message[E07]);
 							break;
+						case E08:
+							/* Invalid parameter. */
+							gdb_cris_strcpy (remcomOutBuffer, error_message[E08]);
+							break;
 						default:
 							/* Valid register number. */
 							gdb_cris_strcpy (remcomOutBuffer, "OK");
@@ -826,7 +808,7 @@ handle_exception (int sigval)
 				   AA..AA is the start address,  LLLL is the number of bytes, and
 				   XX..XX is the hexadecimal data.
 				   Success: OK
-				   Failure: void. */
+				   Failure: E08. */
 				{
 					char *lenptr;
 					char *dataptr;
@@ -835,14 +817,15 @@ handle_exception (int sigval)
 					int length = gdb_cris_strtol(lenptr+1, &dataptr, 16);
 					if (*lenptr == ',' && *dataptr == ':') {
 						if (remcomInBuffer[0] == 'M') {
-							hex2mem(addr, dataptr + 1, length);
-						}
-						else /* X */ {
+							if (hex2bin(addr, dataptr + 1, length))
+								gdb_cris_strcpy (remcomOutBuffer, error_message[E08]);
+							else
+								gdb_cris_strcpy (remcomOutBuffer, "OK");
+						} else /* X */ {
 							bin2mem(addr, dataptr + 1, length);
+							gdb_cris_strcpy (remcomOutBuffer, "OK");
 						}
-						gdb_cris_strcpy (remcomOutBuffer, "OK");
-					}
-					else {
+					} else {
 						gdb_cris_strcpy (remcomOutBuffer, error_message[E06]);
 					}
 				}