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[/] [or1k/] [trunk/] [jtag/] [gdb2.c] - Blame information for rev 1776

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#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdarg.h>
 
/* Libraries for JTAG proxy server.  */
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <sys/select.h>
#include <sys/poll.h>
#include <fcntl.h>
#include <netdb.h>
#include <netinet/tcp.h>
#include <inttypes.h>
#include <errno.h>
 
#include "gdb.h" /* partially copied from gdb/config/or1k */
#include "jp.h"  /* just for debug() */
#include "jp2.h"
 
 
/* connection to jp2 routines */
int gdb_chain = -1;
 
int gdb_read_reg(unsigned long adr, unsigned long *data) {
  debug("rr %d\n", gdb_chain);
  switch (gdb_chain) {
    case SC_RISC_DEBUG: return dbg_cpu0_read(adr, data) ? ERR_CRC : ERR_NONE;
    case SC_REGISTER:   return dbg_cpu0_read_ctrl(adr, (unsigned char*)data) ? ERR_CRC : ERR_NONE;
    case SC_WISHBONE:   return dbg_wb_read32(adr, data) ? ERR_CRC : ERR_NONE;
    case SC_TRACE:      *data = 0; return 0;
    default:            return JTAG_PROXY_INVALID_CHAIN;
  }
}
 
int gdb_write_reg(unsigned long adr, unsigned long data) {
  debug("wr %d\n", gdb_chain);
  switch (gdb_chain) { /* remap registers, to be compatible with jp1 */
    case SC_RISC_DEBUG: if (adr == JTAG_RISCOP) adr = 0x00;
                        return dbg_cpu0_write(adr, data) ? ERR_CRC : ERR_NONE;
    case SC_REGISTER:   return dbg_cpu0_write_ctrl(adr, data) ? ERR_CRC : ERR_NONE;
    case SC_WISHBONE:   return dbg_wb_write32(adr, data) ? ERR_CRC : ERR_NONE;
    case SC_TRACE:      return 0;
    default:            return JTAG_PROXY_INVALID_CHAIN;
  }
}
 
int gdb_read_block(unsigned long adr, unsigned long *data, int len) {
  debug("rb %d\n", gdb_chain);
  switch (gdb_chain) {
    case SC_WISHBONE:   return dbg_wb_read_block32(adr, data, len) ? ERR_CRC : ERR_NONE;
    default:            return JTAG_PROXY_INVALID_CHAIN;
  }
}
 
int gdb_write_block(unsigned long adr, unsigned long *data, int len) {
  debug("wb %d\n", gdb_chain);
  switch (gdb_chain) {
    case SC_WISHBONE:   return dbg_wb_write_block32(adr, data, len) ? ERR_CRC : ERR_NONE;
    default:            return JTAG_PROXY_INVALID_CHAIN;
  }
}
 
int gdb_set_chain(int chain) {
  debug("set_chain %d\n", chain);
  switch (chain) {
    case SC_RISC_DEBUG:
    case SC_REGISTER:
    case SC_TRACE:
    case SC_WISHBONE:   gdb_chain = chain;
                        return ERR_NONE;
    default:            return JTAG_PROXY_INVALID_CHAIN;
  }
}
 
 
 
/************************
   JTAG Server Routines
 ************************/
 
unsigned int serverIP = 0;
unsigned int serverPort = 0;
unsigned int server_fd = 0;
unsigned int gdb_fd = 0;
static int gdb_read(void*, int);
static int gdb_write(void*, int);
static void ProtocolClean(int, int32_t);
 
static int tcp_level = 0;
 
/* Added by CZ 24/05/01 */
int GetServerSocket(const char* name, const char* proto, int port) {
  struct servent *service;
  struct protoent *protocol;
  struct sockaddr_in sa;
  struct hostent *hp;
  int sockfd;
  char myname[256];
  int flags;
  char sTemp[256];
 
  /* First, get the protocol number of TCP */
  if (!(protocol = getprotobyname(proto))) {
    sprintf(sTemp, "Unable to load protocol \"%s\"", proto);
    perror(sTemp);
    return 0;
  }
  tcp_level = protocol->p_proto; /* Save for later */
 
  /* If we weren't passed a non standard port, get the port
     from the services directory. */
  if (!port && (service = getservbyname(name, protocol->p_name)))
    port = ntohs(service->s_port);
 
  /* Create the socket using the TCP protocol */
  if ((sockfd = socket(PF_INET, SOCK_STREAM, protocol->p_proto)) < 0) {
    perror("Unable to create socket");
    return 0;
  }
 
  flags = 1;
  if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, (const char*)&flags, sizeof(int)) < 0) {
    sprintf(sTemp, "Can not set SO_REUSEADDR option on socket %d", sockfd);
    perror(sTemp);
    close(sockfd);
    return 0;
  }
 
  /* The server should also be non blocking. Get the current flags. */
  if((flags = fcntl(sockfd, F_GETFL, 0)) < 0) {
    sprintf(sTemp, "Unable to get flags for socket %d", sockfd);
    perror(sTemp);
    close(sockfd);
    return 0;
  }
 
  /* Set the nonblocking flag */
  if(fcntl(sockfd, F_SETFL, flags | O_NONBLOCK) < 0) {
    sprintf(sTemp, "Unable to set flags for socket %d to value 0x%08x",
                    sockfd, flags | O_NONBLOCK);
    perror(sTemp);
    close(sockfd);
    return 0;
  }
 
  /* Find out what our address is */
  memset(&sa, 0, sizeof(struct sockaddr_in));
  gethostname(myname, sizeof(myname));
  if(!(hp = gethostbyname(myname))) {
    perror("Unable to read hostname");
    close(sockfd);
    return 0;
  }
 
  /* Bind our socket to the appropriate address */
  sa.sin_family = hp->h_addrtype;
  sa.sin_port = htons(port);
  if(bind(sockfd, (struct sockaddr*)&sa, sizeof(struct sockaddr_in)) < 0) {
    sprintf(sTemp, "Unable to bind socket %d to port %d", sockfd, port);
    perror(sTemp);
    close(sockfd);
    return 0;
  }
  serverIP = sa.sin_addr.s_addr;
  flags = sizeof(struct sockaddr_in);
  if(getsockname(sockfd, (struct sockaddr*)&sa, &flags) < 0) {
    sprintf(sTemp, "Unable to get socket information for socket %d", sockfd);
    perror(sTemp);
    close(sockfd);
    return 0;
  }
  serverPort = ntohs(sa.sin_port);
 
  /* Set the backlog to 1 connections */
  if(listen(sockfd, 1) < 0) {
    sprintf(sTemp, "Unable to set backlog on socket %d to %d", sockfd, 1);
    perror(sTemp);
    close(sockfd);
    return 0;
  }
 
  return sockfd;
}
 
void HandleServerSocket(Boolean block) {
  struct pollfd fds[2];
  int n;
 
rebuild:
  n = 0;
  if(!server_fd && !gdb_fd) return;
 
  if(server_fd) {
    fds[n].fd = server_fd;
    fds[n].events = POLLIN;
    fds[n++].revents = 0;
  }
  if(gdb_fd) {
    fds[n].fd = gdb_fd;
    fds[n].events = POLLIN;
    fds[n++].revents = 0;
  }
 
  while(1) {
  switch(poll(fds, n, -1)) {
    case 0:
    case -1:
      if(errno == EINTR) continue;
      perror("poll");
      server_fd = 0;
      return;
    default:
      /* Make sure to handle the gdb port first! */
      if (gdb_fd && (fds[0].revents && !server_fd || fds[1].revents && server_fd)) {
        int revents = server_fd ? fds[1].revents : fds[0].revents;
        if (revents & POLLIN) GDBRequest();
        else {/* Error Occurred */
          fprintf(stderr, "Received flags 0x%08x on gdb socket. Shutting down.\n", revents);
          close(gdb_fd);
          gdb_fd = 0;
        }
      }
      if(fds[0].revents && server_fd) {
        if(fds[0].revents & POLLIN) {
          JTAGRequest();
          goto rebuild;
        } else { /* Error Occurred */
            fprintf(stderr, "Received flags 0x%08x on server. Shutting down.\n", fds[0].revents);
            close(server_fd);
            server_fd = 0;
            serverPort = 0;
            serverIP = 0;
            return;
          }
        }
      break;
    } /* End of switch statement */
  } /* End of while statement */
}
 
void JTAGRequest() {
  struct sockaddr_in sa;
  struct sockaddr* addr = (struct sockaddr*)&sa;
  int n = sizeof(struct sockaddr_in);
  int fd = accept(server_fd, addr, &n);
  int on_off = 0; /* Turn off Nagel's algorithm on the socket */
  int flags;
  char sTemp[256];
 
  if(fd < 0) {
    /* This is valid, because a connection could have started,
       and then terminated due to a protocol error or user
       initiation before the accept could take place. */
    if(errno != EWOULDBLOCK && errno != EAGAIN) {
      perror("accept");
      close(server_fd);
      server_fd = 0;
      serverPort = 0;
      serverIP = 0;
    }
    return;
  }
 
  if(gdb_fd) {
    close(fd);
    return;
  }
 
  if((flags = fcntl(fd, F_GETFL, 0)) < 0) {
    sprintf(sTemp, "Unable to get flags for gdb socket %d", fd);
    perror(sTemp);
    close(fd);
    return;
  }
 
  if(fcntl(fd, F_SETFL, flags | O_NONBLOCK) < 0) {
    sprintf(sTemp, "Unable to set flags for gdb socket %d to value 0x%08x",
      fd, flags | O_NONBLOCK);
    perror(sTemp);
    close(fd);
    return;
  }
 
  if(setsockopt(fd, tcp_level, TCP_NODELAY, &on_off, sizeof(int)) < 0) {
    sprintf(sTemp, "Unable to disable Nagel's algorithm for socket %d.\nsetsockopt", fd);
    perror(sTemp);
    close(fd);
    return;
  }
 
  gdb_fd = fd;
}
 
void GDBRequest() {
  JTAGProxyWriteMessage msg_write;
  JTAGProxyReadMessage msg_read;
  JTAGProxyChainMessage msg_chain;
  JTAGProxyWriteResponse resp_write;
  JTAGProxyReadResponse resp_read;
  JTAGProxyChainResponse resp_chain;
  JTAGProxyBlockWriteMessage *msg_bwrite;
  JTAGProxyBlockReadMessage msg_bread;
  JTAGProxyBlockWriteResponse resp_bwrite;
  JTAGProxyBlockReadResponse *resp_bread;
  char *buf;
  unsigned long long data;
  uint32_t command, length;
  int len, i;
  int err = 0;
 
  /* First, we must read the incomming command */
  if(gdb_read(&command, sizeof(uint32_t)) < 0) {
    if(gdb_fd) {
      perror("gdb socket - 1");
      close(gdb_fd);
      gdb_fd = 0;
    }
    return;
  }
  if(gdb_read(&length, sizeof(uint32_t)) < 0) {
    if(gdb_fd) {
      perror("gdb socket - 2");
      close(gdb_fd);
      gdb_fd = 0;
    }
    return;
  }
  length = ntohl(length);
 
  /* Now, verify the protocol and implement the command */
  switch(ntohl(command)) {
    case JTAG_COMMAND_WRITE:
      if(length != sizeof(msg_write) - 8) {
        ProtocolClean(length, JTAG_PROXY_PROTOCOL_ERROR);
        return;
      }
      buf = (char*)&msg_write;
      if(gdb_read(&buf[8], length) < 0) {
        if(gdb_fd) {
          perror("gdb socket - 3");
          close(gdb_fd);
          gdb_fd = 0;
        }
        return;
      }
      msg_write.address = ntohl(msg_write.address);
      msg_write.data_H = ntohl(msg_write.data_H);
      msg_write.data_L = ntohl(msg_write.data_L);
      err = gdb_write_reg(msg_write.address, msg_write.data_L);
      resp_write.status = htonl(err);
      if(gdb_write(&resp_write, sizeof(resp_write)) < 0) {
        if(gdb_fd) {
          perror("gdb socket - 4");
          close(gdb_fd);
          gdb_fd = 0;
        }
        return;
      }
      break;
    case JTAG_COMMAND_READ:
      if(length != sizeof(msg_read) - 8) {
        ProtocolClean(length, JTAG_PROXY_PROTOCOL_ERROR);
        return;
      }
      buf = (char*)&msg_read;
      if(gdb_read(&buf[8], length) < 0) {
        if(gdb_fd) {
          perror("gdb socket - 5");
          close(gdb_fd);
          gdb_fd = 0;
        }
        return;
      }
      msg_read.address = ntohl(msg_read.address);
      err = gdb_read_reg(msg_read.address, (unsigned long *)&resp_read.data_L);
      resp_read.status = htonl(err);
      resp_read.data_H = 0;
      resp_read.data_L = htonl(resp_read.data_L);
      if(gdb_write(&resp_read, sizeof(resp_read)) < 0) {
        if(gdb_fd) {
          perror("gdb socket - 6");
          close(gdb_fd);
          gdb_fd = 0;
        }
        return;
        }
      break;
    case JTAG_COMMAND_BLOCK_WRITE:
      if(length < sizeof(JTAGProxyBlockWriteMessage)-8) {
        ProtocolClean(length, JTAG_PROXY_PROTOCOL_ERROR);
        return;
      }
      if(!(buf = (char*)malloc(8+length))) {
        ProtocolClean(length, JTAG_PROXY_OUT_OF_MEMORY);
        return;
      }
      msg_bwrite = (JTAGProxyBlockWriteMessage*)buf;
      if(gdb_read(&buf[8], length) < 0) {
        if(gdb_fd) {
          perror("gdb socket - 5");
          close(gdb_fd);
          gdb_fd = 0;
        }
        free(buf);
        return;
      }
      msg_bwrite->address = ntohl(msg_bwrite->address);
      msg_bwrite->nRegisters = ntohl(msg_bwrite->nRegisters);
      for(i=0;i<msg_bwrite->nRegisters;i++) {
        msg_bwrite->data[i] = ntohl(msg_bwrite->data[i]);
      }
      err = gdb_write_block(msg_bwrite->address, (unsigned long*)msg_bwrite->data, msg_bwrite->nRegisters * 4);
      resp_bwrite.status = htonl(err);
      free(buf);
      msg_bwrite = (JTAGProxyBlockWriteMessage *)NULL;
      buf = (char *)msg_bwrite;
      if(gdb_write(&resp_bwrite, sizeof(resp_bwrite)) < 0) {
        if(gdb_fd) {
          perror("gdb socket - 4");
          close(gdb_fd);
          gdb_fd = 0;
        }
        return;
      }
      break;
    case JTAG_COMMAND_BLOCK_READ:
      if(length != sizeof(msg_bread) - 8) {
        ProtocolClean(length, JTAG_PROXY_PROTOCOL_ERROR);
        return;
      }
      buf = (char*)&msg_bread;
      if(gdb_read(&buf[8], length) < 0) {
        if(gdb_fd) {
          perror("gdb socket - 5");
          close(gdb_fd);
          gdb_fd = 0;
        }
        return;
      }
      msg_bread.address = ntohl(msg_bread.address);
      msg_bread.nRegisters = ntohl(msg_bread.nRegisters);
      len = sizeof(JTAGProxyBlockReadResponse) + 4*(msg_bread.nRegisters-1);
      if(!(buf = (char*)malloc(len))) {
        ProtocolClean(0, JTAG_PROXY_OUT_OF_MEMORY);
        return;
      }
      resp_bread = (JTAGProxyBlockReadResponse*)buf;
      err = gdb_read_block(msg_bread.address, (unsigned long*)resp_bread->data, msg_bread.nRegisters * 4);
      for(i=0;i<msg_bread.nRegisters;i++) {
        /* Read previous, address next one. */
        resp_bread->data[i] = htonl(resp_bread->data[i]);
      }
      resp_bread->status = htonl(err);
      resp_bread->nRegisters = htonl(msg_bread.nRegisters);
      if(gdb_write(resp_bread, len) < 0) {
        if(gdb_fd) {
          perror("gdb socket - 6");
          close(gdb_fd);
          gdb_fd = 0;
        }
        free(buf);
        return;
      }
      free(buf);
      resp_bread = (JTAGProxyBlockReadResponse *)NULL;
      buf = (char *)resp_bread;
      break;
    case JTAG_COMMAND_CHAIN:
      if(length != sizeof(msg_chain) - 8) {
        ProtocolClean(length, JTAG_PROXY_PROTOCOL_ERROR);
        return;
      }
      buf = (char*)&msg_chain;
      if(gdb_read(&buf[8], sizeof(msg_chain)-8) < 0) {
        if(gdb_fd) {
          perror("gdb socket - 7");
          close(gdb_fd);
          gdb_fd = 0;
        }
        return;
      }
      msg_chain.chain = htonl(msg_chain.chain);
      err = gdb_set_chain(msg_chain.chain);
      resp_chain.status = htonl(err);
      if(gdb_write(&resp_chain, sizeof(resp_chain)) < 0) {
        if(gdb_fd) {
          perror("gdb socket - 8");
          close(gdb_fd);
          gdb_fd = 0;
        }
        return;
      }
      break;
    default:
      perror("Unknown JTAG command.");
      ProtocolClean(length, JTAG_PROXY_COMMAND_NOT_IMPLEMENTED);
      break;
  }
}
 
static void ProtocolClean(int length, int32_t err) {
  char buf[4096];
 
  err = htonl(err);
  if((gdb_read(buf, length) < 0) || (gdb_write(&err, sizeof(err)) < 0) && gdb_fd) {
    perror("gdb socket - 9");
    close(gdb_fd);
    gdb_fd = 0;
  }
}
 
static int gdb_write(void* buf, int len) {
  int n;
  char* w_buf = (char*)buf;
  struct pollfd block;
 
  while(len) {
    if((n = write(gdb_fd, w_buf, len)) < 0) {
      switch(errno) {
        case EWOULDBLOCK: /* or EAGAIN */
          /* We've been called on a descriptor marked
             for nonblocking I/O. We better simulate
             blocking behavior. */
          block.fd = gdb_fd;
          block.events = POLLOUT;
          block.revents = 0;
          poll(&block, 1, -1);
          continue;
        case EINTR:
          continue;
        case EPIPE:
          close(gdb_fd);
          gdb_fd = 0;
          return -1;
        default:
          return -1;
        }
      } else {
        len -= n;
        w_buf += n;
      }
  }
  return 0;
}
 
static int gdb_read(void* buf, int len) {
  int n;
  char* r_buf = (char*)buf;
  struct pollfd block;
 
  while(len) {
    if((n = read(gdb_fd, r_buf, len)) < 0) {
      switch(errno) {
        case EWOULDBLOCK: /* or EAGAIN */
          /* We've been called on a descriptor marked
       for nonblocking I/O. We better simulate
       blocking behavior. */
          block.fd = gdb_fd;
          block.events = POLLIN;
          block.revents = 0;
          poll(&block, 1, -1);
          continue;
        case EINTR:
          continue;
        default:
          return -1;
        }
    } else if(n == 0) {
      close(gdb_fd);
      gdb_fd = 0;
      return -1;
    } else {
      len -= n;
      r_buf += n;
    }
  }
  return 0;
}

Line No.	Rev	Author	Line
1	1259	markom	`#include <stdio.h>`
2			`#include <ctype.h>`
3			`#include <string.h>`
4			`#include <stdlib.h>`
5			`#include <unistd.h>`
6			`#include <stdarg.h>`
7
8			`/* Libraries for JTAG proxy server. */`
9			`#include <sys/stat.h>`
10			`#include <sys/types.h>`
11			`#include <sys/socket.h>`
12			`#include <netinet/in.h>`
13			`#include <sys/select.h>`
14			`#include <sys/poll.h>`
15			`#include <fcntl.h>`
16			`#include <netdb.h>`
17			`#include <netinet/tcp.h>`
18			`#include <inttypes.h>`
19			`#include <errno.h>`
20
21			`#include "gdb.h" /* partially copied from gdb/config/or1k */`
22	1380	phoenix	`#include "jp.h" /* just for debug() */`
23	1259	markom	`#include "jp2.h"`
24
25
26			`/* connection to jp2 routines */`
27			`int gdb_chain = -1;`
28
29			`int gdb_read_reg(unsigned long adr, unsigned long *data) {`
30	1380	phoenix	`debug("rr %d\n", gdb_chain);`
31	1259	markom	`switch (gdb_chain) {`
32	1274	markom	`case SC_RISC_DEBUG: return dbg_cpu0_read(adr, data) ? ERR_CRC : ERR_NONE;`
33			`case SC_REGISTER: return dbg_cpu0_read_ctrl(adr, (unsigned char*)data) ? ERR_CRC : ERR_NONE;`
34	1259	markom	`case SC_WISHBONE: return dbg_wb_read32(adr, data) ? ERR_CRC : ERR_NONE;`
35	1274	markom	`case SC_TRACE: *data = 0; return 0;`
36	1259	markom	`default: return JTAG_PROXY_INVALID_CHAIN;`
37			`}`
38			`}`
39
40			`int gdb_write_reg(unsigned long adr, unsigned long data) {`
41	1380	phoenix	`debug("wr %d\n", gdb_chain);`
42	1259	markom	`switch (gdb_chain) { /* remap registers, to be compatible with jp1 */`
43			`case SC_RISC_DEBUG: if (adr == JTAG_RISCOP) adr = 0x00;`
44	1274	markom	`return dbg_cpu0_write(adr, data) ? ERR_CRC : ERR_NONE;`
45			`case SC_REGISTER: return dbg_cpu0_write_ctrl(adr, data) ? ERR_CRC : ERR_NONE;`
46	1259	markom	`case SC_WISHBONE: return dbg_wb_write32(adr, data) ? ERR_CRC : ERR_NONE;`
47	1274	markom	`case SC_TRACE: return 0;`
48	1259	markom	`default: return JTAG_PROXY_INVALID_CHAIN;`
49			`}`
50			`}`
51
52			`int gdb_read_block(unsigned long adr, unsigned long *data, int len) {`
53	1380	phoenix	`debug("rb %d\n", gdb_chain);`
54	1259	markom	`switch (gdb_chain) {`
55			`case SC_WISHBONE: return dbg_wb_read_block32(adr, data, len) ? ERR_CRC : ERR_NONE;`
56			`default: return JTAG_PROXY_INVALID_CHAIN;`
57			`}`
58			`}`
59
60			`int gdb_write_block(unsigned long adr, unsigned long *data, int len) {`
61	1380	phoenix	`debug("wb %d\n", gdb_chain);`
62	1259	markom	`switch (gdb_chain) {`
63			`case SC_WISHBONE: return dbg_wb_write_block32(adr, data, len) ? ERR_CRC : ERR_NONE;`
64			`default: return JTAG_PROXY_INVALID_CHAIN;`
65			`}`
66			`}`
67
68			`int gdb_set_chain(int chain) {`
69	1380	phoenix	`debug("set_chain %d\n", chain);`
70	1259	markom	`switch (chain) {`
71			`case SC_RISC_DEBUG:`
72			`case SC_REGISTER:`
73	1274	markom	`case SC_TRACE:`
74	1259	markom	`case SC_WISHBONE: gdb_chain = chain;`
75			`return ERR_NONE;`
76			`default: return JTAG_PROXY_INVALID_CHAIN;`
77			`}`
78			`}`
79
80
81
82			`/************************`
83			`JTAG Server Routines`
84			`************************/`
85
86			`unsigned int serverIP = 0;`
87			`unsigned int serverPort = 0;`
88			`unsigned int server_fd = 0;`
89			`unsigned int gdb_fd = 0;`
90			`static int gdb_read(void*, int);`
91			`static int gdb_write(void*, int);`
92			`static void ProtocolClean(int, int32_t);`
93
94			`static int tcp_level = 0;`
95
96			`/* Added by CZ 24/05/01 */`
97			`int GetServerSocket(const char* name, const char* proto, int port) {`
98			`struct servent *service;`
99			`struct protoent *protocol;`
100			`struct sockaddr_in sa;`
101			`struct hostent *hp;`
102			`int sockfd;`
103			`char myname[256];`
104			`int flags;`
105			`char sTemp[256];`
106
107			`/* First, get the protocol number of TCP */`
108			`if (!(protocol = getprotobyname(proto))) {`
109			`sprintf(sTemp, "Unable to load protocol \"%s\"", proto);`
110			`perror(sTemp);`
111			`return 0;`
112			`}`
113			`tcp_level = protocol->p_proto; /* Save for later */`
114
115			`/* If we weren't passed a non standard port, get the port`
116			`from the services directory. */`
117			`if (!port && (service = getservbyname(name, protocol->p_name)))`
118			`port = ntohs(service->s_port);`
119
120			`/* Create the socket using the TCP protocol */`
121			`if ((sockfd = socket(PF_INET, SOCK_STREAM, protocol->p_proto)) < 0) {`
122			`perror("Unable to create socket");`
123			`return 0;`
124			`}`
125
126			`flags = 1;`
127			`if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, (const char*)&flags, sizeof(int)) < 0) {`
128			`sprintf(sTemp, "Can not set SO_REUSEADDR option on socket %d", sockfd);`
129			`perror(sTemp);`
130			`close(sockfd);`
131			`return 0;`
132			`}`
133
134			`/* The server should also be non blocking. Get the current flags. */`
135	1322	phoenix	`if((flags = fcntl(sockfd, F_GETFL, 0)) < 0) {`
136	1259	markom	`sprintf(sTemp, "Unable to get flags for socket %d", sockfd);`
137			`perror(sTemp);`
138			`close(sockfd);`
139			`return 0;`
140			`}`
141
142			`/* Set the nonblocking flag */`
143			`if(fcntl(sockfd, F_SETFL, flags \| O_NONBLOCK) < 0) {`
144			`sprintf(sTemp, "Unable to set flags for socket %d to value 0x%08x",`
145			`sockfd, flags \| O_NONBLOCK);`
146			`perror(sTemp);`
147			`close(sockfd);`
148			`return 0;`
149			`}`
150
151			`/* Find out what our address is */`
152			`memset(&sa, 0, sizeof(struct sockaddr_in));`
153			`gethostname(myname, sizeof(myname));`
154			`if(!(hp = gethostbyname(myname))) {`
155			`perror("Unable to read hostname");`
156			`close(sockfd);`
157			`return 0;`
158			`}`
159
160			`/* Bind our socket to the appropriate address */`
161			`sa.sin_family = hp->h_addrtype;`
162			`sa.sin_port = htons(port);`
163			`if(bind(sockfd, (struct sockaddr*)&sa, sizeof(struct sockaddr_in)) < 0) {`
164			`sprintf(sTemp, "Unable to bind socket %d to port %d", sockfd, port);`
165			`perror(sTemp);`
166			`close(sockfd);`
167			`return 0;`
168			`}`
169			`serverIP = sa.sin_addr.s_addr;`
170			`flags = sizeof(struct sockaddr_in);`
171			`if(getsockname(sockfd, (struct sockaddr*)&sa, &flags) < 0) {`
172			`sprintf(sTemp, "Unable to get socket information for socket %d", sockfd);`
173			`perror(sTemp);`
174			`close(sockfd);`
175			`return 0;`
176			`}`
177			`serverPort = ntohs(sa.sin_port);`
178
179			`/* Set the backlog to 1 connections */`
180			`if(listen(sockfd, 1) < 0) {`
181			`sprintf(sTemp, "Unable to set backlog on socket %d to %d", sockfd, 1);`
182			`perror(sTemp);`
183			`close(sockfd);`
184			`return 0;`
185			`}`
186
187			`return sockfd;`
188			`}`
189
190			`void HandleServerSocket(Boolean block) {`
191			`struct pollfd fds[2];`
192			`int n;`
193
194			`rebuild:`
195			`n = 0;`
196			`if(!server_fd && !gdb_fd) return;`
197
198			`if(server_fd) {`
199			`fds[n].fd = server_fd;`
200			`fds[n].events = POLLIN;`
201			`fds[n++].revents = 0;`
202			`}`
203			`if(gdb_fd) {`
204			`fds[n].fd = gdb_fd;`
205			`fds[n].events = POLLIN;`
206			`fds[n++].revents = 0;`
207			`}`
208
209			`while(1) {`
210			`switch(poll(fds, n, -1)) {`
211			`case 0:`
212			`case -1:`
213			`if(errno == EINTR) continue;`
214			`perror("poll");`
215			`server_fd = 0;`
216			`return;`
217			`default:`
218			`/* Make sure to handle the gdb port first! */`
219			`if (gdb_fd && (fds[0].revents && !server_fd \|\| fds[1].revents && server_fd)) {`
220			`int revents = server_fd ? fds[1].revents : fds[0].revents;`
221			`if (revents & POLLIN) GDBRequest();`
222			`else {/* Error Occurred */`
223			`fprintf(stderr, "Received flags 0x%08x on gdb socket. Shutting down.\n", revents);`
224			`close(gdb_fd);`
225			`gdb_fd = 0;`
226			`}`
227			`}`
228			`if(fds[0].revents && server_fd) {`
229			`if(fds[0].revents & POLLIN) {`
230			`JTAGRequest();`
231			`goto rebuild;`
232			`} else { /* Error Occurred */`
233			`fprintf(stderr, "Received flags 0x%08x on server. Shutting down.\n", fds[0].revents);`
234			`close(server_fd);`
235			`server_fd = 0;`
236			`serverPort = 0;`
237			`serverIP = 0;`
238			`return;`
239			`}`
240			`}`
241			`break;`
242			`} /* End of switch statement */`
243			`} /* End of while statement */`
244			`}`
245
246			`void JTAGRequest() {`
247			`struct sockaddr_in sa;`
248			`struct sockaddr* addr = (struct sockaddr*)&sa;`
249			`int n = sizeof(struct sockaddr_in);`
250			`int fd = accept(server_fd, addr, &n);`
251			`int on_off = 0; /* Turn off Nagel's algorithm on the socket */`
252			`int flags;`
253			`char sTemp[256];`
254
255			`if(fd < 0) {`
256			`/* This is valid, because a connection could have started,`
257			`and then terminated due to a protocol error or user`
258			`initiation before the accept could take place. */`
259			`if(errno != EWOULDBLOCK && errno != EAGAIN) {`
260			`perror("accept");`
261			`close(server_fd);`
262			`server_fd = 0;`
263			`serverPort = 0;`
264			`serverIP = 0;`
265			`}`
266			`return;`
267			`}`
268
269			`if(gdb_fd) {`
270			`close(fd);`
271			`return;`
272			`}`
273
274	1322	phoenix	`if((flags = fcntl(fd, F_GETFL, 0)) < 0) {`
275	1259	markom	`sprintf(sTemp, "Unable to get flags for gdb socket %d", fd);`
276			`perror(sTemp);`
277			`close(fd);`
278			`return;`
279			`}`
280
281			`if(fcntl(fd, F_SETFL, flags \| O_NONBLOCK) < 0) {`
282			`sprintf(sTemp, "Unable to set flags for gdb socket %d to value 0x%08x",`
283			`fd, flags \| O_NONBLOCK);`
284			`perror(sTemp);`
285			`close(fd);`
286			`return;`
287			`}`
288
289			`if(setsockopt(fd, tcp_level, TCP_NODELAY, &on_off, sizeof(int)) < 0) {`
290			`sprintf(sTemp, "Unable to disable Nagel's algorithm for socket %d.\nsetsockopt", fd);`
291			`perror(sTemp);`
292			`close(fd);`
293			`return;`
294			`}`
295
296			`gdb_fd = fd;`
297			`}`
298
299			`void GDBRequest() {`
300			`JTAGProxyWriteMessage msg_write;`
301			`JTAGProxyReadMessage msg_read;`
302			`JTAGProxyChainMessage msg_chain;`
303			`JTAGProxyWriteResponse resp_write;`
304			`JTAGProxyReadResponse resp_read;`
305			`JTAGProxyChainResponse resp_chain;`
306			`JTAGProxyBlockWriteMessage *msg_bwrite;`
307			`JTAGProxyBlockReadMessage msg_bread;`
308			`JTAGProxyBlockWriteResponse resp_bwrite;`
309			`JTAGProxyBlockReadResponse *resp_bread;`
310			`char *buf;`
311			`unsigned long long data;`
312			`uint32_t command, length;`
313			`int len, i;`
314			`int err = 0;`
315
316			`/* First, we must read the incomming command */`
317			`if(gdb_read(&command, sizeof(uint32_t)) < 0) {`
318			`if(gdb_fd) {`
319			`perror("gdb socket - 1");`
320			`close(gdb_fd);`
321			`gdb_fd = 0;`
322			`}`
323			`return;`
324			`}`
325			`if(gdb_read(&length, sizeof(uint32_t)) < 0) {`
326			`if(gdb_fd) {`
327			`perror("gdb socket - 2");`
328			`close(gdb_fd);`
329			`gdb_fd = 0;`
330			`}`
331			`return;`
332			`}`
333			`length = ntohl(length);`
334
335			`/* Now, verify the protocol and implement the command */`
336			`switch(ntohl(command)) {`
337			`case JTAG_COMMAND_WRITE:`
338			`if(length != sizeof(msg_write) - 8) {`
339			`ProtocolClean(length, JTAG_PROXY_PROTOCOL_ERROR);`
340			`return;`
341			`}`
342			`buf = (char*)&msg_write;`
343			`if(gdb_read(&buf[8], length) < 0) {`
344			`if(gdb_fd) {`
345			`perror("gdb socket - 3");`
346			`close(gdb_fd);`
347			`gdb_fd = 0;`
348			`}`
349			`return;`
350			`}`
351			`msg_write.address = ntohl(msg_write.address);`
352			`msg_write.data_H = ntohl(msg_write.data_H);`
353			`msg_write.data_L = ntohl(msg_write.data_L);`
354			`err = gdb_write_reg(msg_write.address, msg_write.data_L);`
355			`resp_write.status = htonl(err);`
356			`if(gdb_write(&resp_write, sizeof(resp_write)) < 0) {`
357			`if(gdb_fd) {`
358			`perror("gdb socket - 4");`
359			`close(gdb_fd);`
360			`gdb_fd = 0;`
361			`}`
362			`return;`
363			`}`
364			`break;`
365			`case JTAG_COMMAND_READ:`
366			`if(length != sizeof(msg_read) - 8) {`
367			`ProtocolClean(length, JTAG_PROXY_PROTOCOL_ERROR);`
368			`return;`
369			`}`
370			`buf = (char*)&msg_read;`
371			`if(gdb_read(&buf[8], length) < 0) {`
372			`if(gdb_fd) {`
373			`perror("gdb socket - 5");`
374			`close(gdb_fd);`
375			`gdb_fd = 0;`
376			`}`
377			`return;`
378			`}`
379			`msg_read.address = ntohl(msg_read.address);`
380			`err = gdb_read_reg(msg_read.address, (unsigned long *)&resp_read.data_L);`
381			`resp_read.status = htonl(err);`
382			`resp_read.data_H = 0;`
383			`resp_read.data_L = htonl(resp_read.data_L);`
384			`if(gdb_write(&resp_read, sizeof(resp_read)) < 0) {`
385			`if(gdb_fd) {`
386			`perror("gdb socket - 6");`
387			`close(gdb_fd);`
388			`gdb_fd = 0;`
389			`}`
390			`return;`
391			`}`
392			`break;`
393			`case JTAG_COMMAND_BLOCK_WRITE:`
394			`if(length < sizeof(JTAGProxyBlockWriteMessage)-8) {`
395			`ProtocolClean(length, JTAG_PROXY_PROTOCOL_ERROR);`
396			`return;`
397			`}`
398			`if(!(buf = (char*)malloc(8+length))) {`
399			`ProtocolClean(length, JTAG_PROXY_OUT_OF_MEMORY);`
400			`return;`
401			`}`
402			`msg_bwrite = (JTAGProxyBlockWriteMessage*)buf;`
403			`if(gdb_read(&buf[8], length) < 0) {`
404			`if(gdb_fd) {`
405			`perror("gdb socket - 5");`
406			`close(gdb_fd);`
407			`gdb_fd = 0;`
408			`}`
409			`free(buf);`
410			`return;`
411			`}`
412			`msg_bwrite->address = ntohl(msg_bwrite->address);`
413			`msg_bwrite->nRegisters = ntohl(msg_bwrite->nRegisters);`
414			`for(i=0;i<msg_bwrite->nRegisters;i++) {`
415			`msg_bwrite->data[i] = ntohl(msg_bwrite->data[i]);`
416			`}`
417			`err = gdb_write_block(msg_bwrite->address, (unsigned long)msg_bwrite->data, msg_bwrite->nRegisters 4);`
418			`resp_bwrite.status = htonl(err);`
419			`free(buf);`
420			`msg_bwrite = (JTAGProxyBlockWriteMessage *)NULL;`
421			`buf = (char *)msg_bwrite;`
422			`if(gdb_write(&resp_bwrite, sizeof(resp_bwrite)) < 0) {`
423			`if(gdb_fd) {`
424			`perror("gdb socket - 4");`
425			`close(gdb_fd);`
426			`gdb_fd = 0;`
427			`}`
428			`return;`
429			`}`
430			`break;`
431			`case JTAG_COMMAND_BLOCK_READ:`
432			`if(length != sizeof(msg_bread) - 8) {`
433			`ProtocolClean(length, JTAG_PROXY_PROTOCOL_ERROR);`
434			`return;`
435			`}`
436			`buf = (char*)&msg_bread;`
437			`if(gdb_read(&buf[8], length) < 0) {`
438			`if(gdb_fd) {`
439			`perror("gdb socket - 5");`
440			`close(gdb_fd);`
441			`gdb_fd = 0;`
442			`}`
443			`return;`
444			`}`
445			`msg_bread.address = ntohl(msg_bread.address);`
446			`msg_bread.nRegisters = ntohl(msg_bread.nRegisters);`
447			`len = sizeof(JTAGProxyBlockReadResponse) + 4*(msg_bread.nRegisters-1);`
448			`if(!(buf = (char*)malloc(len))) {`
449			`ProtocolClean(0, JTAG_PROXY_OUT_OF_MEMORY);`
450			`return;`
451			`}`
452			`resp_bread = (JTAGProxyBlockReadResponse*)buf;`
453			`err = gdb_read_block(msg_bread.address, (unsigned long)resp_bread->data, msg_bread.nRegisters 4);`
454			`for(i=0;i<msg_bread.nRegisters;i++) {`
455			`/* Read previous, address next one. */`
456			`resp_bread->data[i] = htonl(resp_bread->data[i]);`
457			`}`
458			`resp_bread->status = htonl(err);`
459			`resp_bread->nRegisters = htonl(msg_bread.nRegisters);`
460			`if(gdb_write(resp_bread, len) < 0) {`
461			`if(gdb_fd) {`
462			`perror("gdb socket - 6");`
463			`close(gdb_fd);`
464			`gdb_fd = 0;`
465			`}`
466			`free(buf);`
467			`return;`
468			`}`
469			`free(buf);`
470			`resp_bread = (JTAGProxyBlockReadResponse *)NULL;`
471			`buf = (char *)resp_bread;`
472			`break;`
473			`case JTAG_COMMAND_CHAIN:`
474			`if(length != sizeof(msg_chain) - 8) {`
475			`ProtocolClean(length, JTAG_PROXY_PROTOCOL_ERROR);`
476			`return;`
477			`}`
478			`buf = (char*)&msg_chain;`
479			`if(gdb_read(&buf[8], sizeof(msg_chain)-8) < 0) {`
480			`if(gdb_fd) {`
481			`perror("gdb socket - 7");`
482			`close(gdb_fd);`
483			`gdb_fd = 0;`
484			`}`
485			`return;`
486			`}`
487			`msg_chain.chain = htonl(msg_chain.chain);`
488			`err = gdb_set_chain(msg_chain.chain);`
489			`resp_chain.status = htonl(err);`
490			`if(gdb_write(&resp_chain, sizeof(resp_chain)) < 0) {`
491			`if(gdb_fd) {`
492			`perror("gdb socket - 8");`
493			`close(gdb_fd);`
494			`gdb_fd = 0;`
495			`}`
496			`return;`
497			`}`
498			`break;`
499			`default:`
500			`perror("Unknown JTAG command.");`

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