Removed superfluous htons()/htonl() functions (we already have the
standard byte order functions in the kernel). Small cleanup. git-svn-id: file:///srv/svn/repos/haiku/trunk/current@7705 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
parent
78f42e3f33
commit
38e937ca8e
@ -29,35 +29,20 @@ static char safe_mem[512];
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/*
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* utility functions
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*/
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static
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int
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htons(short value)
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{
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return ((value>>8)&0xff) | ((value&0xff)<<8);
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}
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static
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int
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htonl(int value)
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{
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return htons((value>>16)&0xffff) | (htons(value&0xffff)<<16);
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}
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static
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int
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static int
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parse_nibble(int input)
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{
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int nibble= 0xff;
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int nibble = 0xff;
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if((input>= '0') && (input<= '9')) {
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nibble= input-'0';
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}
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if((input>= 'A') && (input<= 'F')) {
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nibble= 0x0a+(input-'A');
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}
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if((input>= 'a') && (input<= 'f')) {
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nibble= 0x0a+(input-'a');
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}
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if (input >= '0' && input <= '9')
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nibble = input - '0';
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if (input >= 'A' && input <= 'F')
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nibble = 0x0a + input - 'A';
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if (input >= 'a' && input <= 'f')
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nibble = 0x0a + input - 'a';
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return nibble;
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}
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@ -68,29 +53,29 @@ parse_nibble(int input)
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* GDB protocol ACK & NAK & Reply
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*
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*/
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static
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void
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static void
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gdb_ack(void)
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{
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dbg_putch('+');
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}
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static
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void
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static void
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gdb_nak(void)
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{
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dbg_putch('-');
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}
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static
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void
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static void
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gdb_resend_reply(void)
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{
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dbg_puts(reply);
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}
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static
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void
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static void
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gdb_reply(char const *fmt, ...)
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{
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int i;
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@ -99,68 +84,68 @@ gdb_reply(char const *fmt, ...)
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va_list args;
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va_start(args, fmt);
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reply[0]= '$';
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vsprintf(reply+1, fmt, args);
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reply[0] = '$';
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vsprintf(reply + 1, fmt, args);
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va_end(args);
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len= strlen(reply);
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sum= 0;
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for(i= 1; i< len; i++) {
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sum+= reply[i];
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len = strlen(reply);
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sum = 0;
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for (i = 1; i < len; i++) {
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sum += reply[i];
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}
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sum%= 256;
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sum %= 256;
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sprintf(reply+len, "#%02x", sum);
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sprintf(reply + len, "#%02x", sum);
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gdb_resend_reply();
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}
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static
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void
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static void
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gdb_regreply(int const *regs, int numregs)
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{
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int i;
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int len;
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int sum;
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reply[0]= '$';
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for(i= 0; i< numregs; i++) {
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sprintf(reply+1+8*i, "%08x", htonl(regs[i]));
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reply[0] = '$';
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for (i = 0; i < numregs; i++) {
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sprintf(reply+1+8*i, "%08lx", B_HOST_TO_BENDIAN_INT32(regs[i]));
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}
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len= strlen(reply);
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sum= 0;
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for(i= 1; i< len; i++) {
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sum+= reply[i];
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len = strlen(reply);
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sum = 0;
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for (i = 1; i < len; i++) {
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sum += reply[i];
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}
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sum%= 256;
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sum %= 256;
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sprintf(reply+len, "#%02x", sum);
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sprintf(reply + len, "#%02x", sum);
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gdb_resend_reply();
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}
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static
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void
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static void
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gdb_memreply(char const *bytes, int numbytes)
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{
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int i;
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int len;
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int sum;
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reply[0]= '$';
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for(i= 0; i< numbytes; i++) {
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sprintf(reply+1+2*i, "%02x", (unsigned char)bytes[i]);
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reply[0] = '$';
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for (i = 0; i < numbytes; i++) {
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sprintf(reply+1+2*i, "%02x", (uint8)bytes[i]);
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}
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len= strlen(reply);
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sum= 0;
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for(i= 1; i< len; i++) {
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sum+= reply[i];
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len = strlen(reply);
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sum = 0;
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for (i = 1; i < len; i++) {
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sum += reply[i];
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}
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sum%= 256;
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sum %= 256;
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sprintf(reply+len, "#%02x", sum);
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sprintf(reply + len, "#%02x", sum);
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gdb_resend_reply();
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}
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@ -170,57 +155,51 @@ gdb_memreply(char const *bytes, int numbytes)
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/*
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* checksum verification
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*/
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static
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int
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static int
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gdb_verify_checksum(void)
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{
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int i;
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int len;
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int sum;
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len= strlen(cmd);
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sum= 0;
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for(i= 0; i< len; i++) {
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sum+= cmd[i];
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len = strlen(cmd);
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sum = 0;
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for (i = 0; i < len; i++) {
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sum += cmd[i];
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}
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sum%= 256;
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sum %= 256;
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return (sum==checksum)?1:0;
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return (sum == checksum) ? 1 : 0;
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}
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/*
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* command parsing an dispatching
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*/
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static
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int
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static int
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gdb_parse_command(void)
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{
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// int retval;
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if(!gdb_verify_checksum()) {
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if (!gdb_verify_checksum()) {
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gdb_nak();
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return INIT;
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} else {
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} else
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gdb_ack();
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}
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switch(cmd[0]) {
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switch (cmd[0]) {
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case 'H':
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{
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/*
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* Command H (actually Hct) is used to select
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* the current thread (-1 meaning all threads)
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* We just fake we recognize the the command
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* and send an 'OK' response.
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*/
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gdb_reply("OK");
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} break;
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/*
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* Command H (actually Hct) is used to select
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* the current thread (-1 meaning all threads)
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* We just fake we recognize the the command
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* and send an 'OK' response.
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*/
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gdb_reply("OK");
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break;
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case 'q':
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{
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// extern unsigned _start;
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extern unsigned __data_start;
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extern unsigned __bss_start;
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@ -242,28 +221,24 @@ gdb_parse_command(void)
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* pre-links at 0x80000000. To keep gdb
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* gdb happy we just substract that amount.
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*/
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if(strcmp(cmd+1, "Offsets")== 0) {
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gdb_reply(
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"Text=%x;Data=%x;Bss=%x",
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0,
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if (strcmp(cmd+1, "Offsets") == 0) {
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gdb_reply("Text=%x;Data=%x;Bss=%x", 0,
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((unsigned)(&__data_start))-0x80000000,
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((unsigned)(&__bss_start))-0x80000000
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);
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} else {
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((unsigned)(&__bss_start))-0x80000000);
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} else
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gdb_reply("ENS");
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}
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} break;
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}
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break;
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case '?':
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{
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/*
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* command '?' is used for retrieving the signal
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* that stopped the program. Fully implemeting
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* this command requires help from the debugger,
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* by now we just fake a SIGKILL
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*/
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gdb_reply("S09"); /* SIGKILL = 9 */
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} break;
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/*
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* command '?' is used for retrieving the signal
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* that stopped the program. Fully implemeting
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* this command requires help from the debugger,
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* by now we just fake a SIGKILL
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*/
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gdb_reply("S09"); /* SIGKILL = 9 */
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break;
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case 'g':
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{
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@ -286,9 +261,10 @@ gdb_parse_command(void)
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* reason (unknown to me) gdb wants the register
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* dump in *big endian* format.
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*/
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cpu= smp_get_current_cpu();
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cpu = smp_get_current_cpu();
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gdb_regreply(dbg_register_file[cpu], 14);
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} break;
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}
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break;
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case 'm':
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{
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@ -301,26 +277,25 @@ gdb_parse_command(void)
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* where AAA is the address and LLL is the
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* number of bytes.
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*/
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ptr= cmd+1;
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address= 0;
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len= 0;
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while(ptr && *ptr && (*ptr!= ',')) {
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address<<= 4;
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address+= parse_nibble(*ptr);
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ptr+= 1;
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ptr = cmd+1;
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address = 0;
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len = 0;
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while (ptr && *ptr && (*ptr != ',')) {
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address <<= 4;
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address += parse_nibble(*ptr);
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ptr += 1;
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}
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if(*ptr== ',') {
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ptr+= 1;
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}
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while(ptr && *ptr) {
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len<<= 4;
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len+= parse_nibble(*ptr);
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if (*ptr == ',')
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ptr+= 1;
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while (ptr && *ptr) {
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len <<= 4;
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len += parse_nibble(*ptr);
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ptr += 1;
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}
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if(len> 128) {
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len= 128;
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}
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if (len> 128)
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len = 128;
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/*
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* We cannot directly access the requested memory
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@ -328,31 +303,28 @@ gdb_parse_command(void)
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* We copy the memory to a safe buffer using
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* the bulletproof user_memcpy().
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*/
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if(user_memcpy(safe_mem, (char*)address, len)< 0) {
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if (user_memcpy(safe_mem, (char *)address, len) < 0)
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gdb_reply("E02");
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} else {
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else
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gdb_memreply(safe_mem, len);
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}
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} break;
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}
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break;
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case 'k':
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{
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/*
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* Command 'k' actual semantics is 'kill the damn thing'.
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* However gdb sends that command when you disconnect
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* from a debug session. I guess that 'kill' for the
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* kernel would map to reboot... however that's a
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* a very mean thing to do, instead we just quit
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* the gdb state machine and fallback to the regular
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* kernel debugger command prompt.
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*/
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return QUIT;
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} break;
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/*
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* Command 'k' actual semantics is 'kill the damn thing'.
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* However gdb sends that command when you disconnect
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* from a debug session. I guess that 'kill' for the
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* kernel would map to reboot... however that's a
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* a very mean thing to do, instead we just quit
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* the gdb state machine and fallback to the regular
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* kernel debugger command prompt.
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*/
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return QUIT;
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default:
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{
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gdb_reply("E01");
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} break;
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gdb_reply("E01");
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break;
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}
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return WAITACK;
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@ -363,15 +335,16 @@ gdb_parse_command(void)
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/*
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* GDB protocol state machine
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*/
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static
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int
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static int
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gdb_init_handler(int input)
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{
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switch(input) {
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switch (input) {
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case '$':
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memset(cmd, 0, sizeof(cmd));
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cmd_ptr= 0;
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cmd_ptr = 0;
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return CMDREAD;
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default:
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#if 0
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gdb_nak();
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@ -387,27 +360,28 @@ gdb_init_handler(int input)
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}
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}
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static
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int
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static int
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gdb_cmdread_handler(int input)
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{
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switch(input) {
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switch (input) {
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case '#':
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return CKSUM1;
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default:
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cmd[cmd_ptr]= input;
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cmd_ptr+= 1;
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cmd[cmd_ptr] = input;
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cmd_ptr += 1;
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return CMDREAD;
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}
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}
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static
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int
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static int
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gdb_cksum1_handler(int input)
|
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{
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int nibble= parse_nibble(input);
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int nibble = parse_nibble(input);
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if(nibble== 0xff) {
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if (nibble == 0xff) {
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#if 0
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gdb_nak();
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return INIT;
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@ -421,18 +395,18 @@ gdb_cksum1_handler(int input)
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#endif
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}
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checksum= nibble<< 4;
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checksum = nibble << 4;
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||||
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return CKSUM2;
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}
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static
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int
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||||
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static int
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gdb_cksum2_handler(int input)
|
||||
{
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||||
int nibble= parse_nibble(input);
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||||
int nibble = parse_nibble(input);
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||||
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||||
if(nibble== 0xff) {
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||||
if (nibble == 0xff) {
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||||
#if 0
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||||
gdb_nak();
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||||
return INIT;
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||||
@ -446,21 +420,22 @@ gdb_cksum2_handler(int input)
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#endif
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||||
}
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||||
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||||
checksum+= nibble;
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||||
checksum += nibble;
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||||
|
||||
return gdb_parse_command();
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||||
}
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||||
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||||
static
|
||||
int
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||||
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||||
static int
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||||
gdb_waitack_handler(int input)
|
||||
{
|
||||
switch(input) {
|
||||
switch (input) {
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||||
case '+':
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||||
return INIT;
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||||
case '-':
|
||||
gdb_resend_reply();
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return WAITACK;
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||||
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||||
default:
|
||||
/*
|
||||
* looks like gdb and us are out of synch,
|
||||
@ -471,8 +446,8 @@ gdb_waitack_handler(int input)
|
||||
}
|
||||
}
|
||||
|
||||
static
|
||||
int
|
||||
|
||||
static int
|
||||
gdb_quit_handler(int input)
|
||||
{
|
||||
(void)(input);
|
||||
@ -483,8 +458,8 @@ gdb_quit_handler(int input)
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||||
return QUIT;
|
||||
}
|
||||
|
||||
static int (*dispatch_table[GDBSTATES])(int)=
|
||||
{
|
||||
|
||||
static int (*dispatch_table[GDBSTATES])(int) = {
|
||||
&gdb_init_handler,
|
||||
&gdb_cmdread_handler,
|
||||
&gdb_cksum1_handler,
|
||||
@ -493,35 +468,32 @@ static int (*dispatch_table[GDBSTATES])(int)=
|
||||
&gdb_quit_handler
|
||||
};
|
||||
|
||||
static
|
||||
int
|
||||
|
||||
static int
|
||||
gdb_state_dispatch(int curr, int input)
|
||||
{
|
||||
if(curr< INIT) {
|
||||
if (curr < INIT || curr >= GDBSTATES)
|
||||
return QUIT;
|
||||
}
|
||||
if(curr>= GDBSTATES) {
|
||||
return QUIT;
|
||||
}
|
||||
|
||||
return dispatch_table[curr](input);
|
||||
}
|
||||
|
||||
static
|
||||
int
|
||||
|
||||
static int
|
||||
gdb_state_machine(void)
|
||||
{
|
||||
int state= INIT;
|
||||
int state = INIT;
|
||||
int c;
|
||||
|
||||
while(state!= QUIT) {
|
||||
c= arch_dbg_con_read();
|
||||
state= gdb_state_dispatch(state, c);
|
||||
while (state != QUIT) {
|
||||
c = arch_dbg_con_read();
|
||||
state = gdb_state_dispatch(state, c);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
int
|
||||
cmd_gdb(int argc, char **argv)
|
||||
{
|
||||
|
Loading…
Reference in New Issue
Block a user