/* Target dependent code for the Fujitsu SPARClite for GDB, the GNU debugger. Copyright 1994, 1995 Free Software Foundation, Inc. This file is part of GDB. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include "defs.h" #include "gdbcore.h" #include "breakpoint.h" #include "target.h" #include "serial.h" #include #include #if defined(__GO32__) || defined(WIN32) #undef HAVE_SOCKETS #else #define HAVE_SOCKETS #endif #ifdef HAVE_SOCKETS #include #include #include #include #endif extern struct target_ops sparclite_ops; /* Forward decl */ extern struct target_ops remote_ops; static char *remote_target_name = NULL; static serial_t remote_desc = NULL; static int serial_flag; #ifdef HAVE_SOCKETS static int udp_fd = -1; #endif static serial_t open_tty PARAMS ((char *name)); static int send_resp PARAMS ((serial_t desc, char c)); static void close_tty PARAMS ((int ignore)); #ifdef HAVE_SOCKETS static int recv_udp_buf PARAMS ((int fd, unsigned char *buf, int len, int timeout)); static int send_udp_buf PARAMS ((int fd, unsigned char *buf, int len)); #endif static void sparclite_open PARAMS ((char *name, int from_tty)); static void sparclite_close PARAMS ((int quitting)); static void download PARAMS ((char *target_name, char *args, int from_tty, void (*write_routine) (bfd *from_bfd, asection *from_sec, file_ptr from_addr, bfd_vma to_addr, int len), void (*start_routine) (bfd_vma entry))); static void sparclite_serial_start PARAMS ((bfd_vma entry)); static void sparclite_serial_write PARAMS ((bfd *from_bfd, asection *from_sec, file_ptr from_addr, bfd_vma to_addr, int len)); #ifdef HAVE_SOCKETS static unsigned short calc_checksum PARAMS ((unsigned char *buffer, int count)); static void sparclite_udp_start PARAMS ((bfd_vma entry)); static void sparclite_udp_write PARAMS ((bfd *from_bfd, asection *from_sec, file_ptr from_addr, bfd_vma to_addr, int len)); #endif static void sparclite_download PARAMS ((char *filename, int from_tty)); #define DDA2_SUP_ASI 0xb000000 #define DDA1_SUP_ASI 0xb0000 #define DDA2_ASI_MASK 0xff000000 #define DDA1_ASI_MASK 0xff0000 #define DIA2_SUP_MODE 0x8000 #define DIA1_SUP_MODE 0x4000 #define DDA2_ENABLE 0x100 #define DDA1_ENABLE 0x80 #define DIA2_ENABLE 0x40 #define DIA1_ENABLE 0x20 #define DSINGLE_STEP 0x10 #define DDV_TYPE_MASK 0xc #define DDV_TYPE_LOAD 0x0 #define DDV_TYPE_STORE 0x4 #define DDV_TYPE_ACCESS 0x8 #define DDV_TYPE_ALWAYS 0xc #define DDV_COND 0x2 #define DDV_MASK 0x1 int sparclite_insert_watchpoint (addr, len, type) CORE_ADDR addr; int len; int type; { CORE_ADDR dcr; dcr = read_register (DCR_REGNUM); if (!(dcr & DDA1_ENABLE)) { write_register (DDA1_REGNUM, addr); dcr &= ~(DDA1_ASI_MASK | DDV_TYPE_MASK); dcr |= (DDA1_SUP_ASI | DDA1_ENABLE); if (type == 1) { write_register (DDV1_REGNUM, 0); write_register (DDV2_REGNUM, 0xffffffff); dcr |= (DDV_TYPE_LOAD & (~DDV_COND & ~DDV_MASK)); } else if (type == 0) { write_register (DDV1_REGNUM, 0); write_register (DDV2_REGNUM, 0xffffffff); dcr |= (DDV_TYPE_STORE & (~DDV_COND & ~DDV_MASK)); } else { write_register (DDV1_REGNUM, 0); write_register (DDV2_REGNUM, 0xffffffff); dcr |= (DDV_TYPE_ACCESS); } write_register (DCR_REGNUM, dcr); } else if (!(dcr & DDA2_ENABLE)) { write_register (DDA2_REGNUM, addr); dcr &= ~(DDA2_ASI_MASK & DDV_TYPE_MASK); dcr |= (DDA2_SUP_ASI | DDA2_ENABLE); if (type == 1) { write_register (DDV1_REGNUM, 0); write_register (DDV2_REGNUM, 0xffffffff); dcr |= (DDV_TYPE_LOAD & ~DDV_COND & ~DDV_MASK); } else if (type == 0) { write_register (DDV1_REGNUM, 0); write_register (DDV2_REGNUM, 0xffffffff); dcr |= (DDV_TYPE_STORE & ~DDV_COND & ~DDV_MASK); } else { write_register (DDV1_REGNUM, 0); write_register (DDV2_REGNUM, 0xffffffff); dcr |= (DDV_TYPE_ACCESS); } write_register (DCR_REGNUM, dcr); } else return -1; return 0; } int sparclite_remove_watchpoint (addr, len, type) CORE_ADDR addr; int len; int type; { CORE_ADDR dcr, dda1, dda2; dcr = read_register (DCR_REGNUM); dda1 = read_register (DDA1_REGNUM); dda2 = read_register (DDA2_REGNUM); if ((dcr & DDA1_ENABLE) && addr == dda1) write_register (DCR_REGNUM, (dcr & ~DDA1_ENABLE)); else if ((dcr & DDA2_ENABLE) && addr == dda2) write_register (DCR_REGNUM, (dcr & ~DDA2_ENABLE)); else return -1; return 0; } int sparclite_insert_hw_breakpoint (addr, len) CORE_ADDR addr; int len; { CORE_ADDR dcr; dcr = read_register (DCR_REGNUM); if (!(dcr & DIA1_ENABLE)) { write_register (DIA1_REGNUM, addr); write_register (DCR_REGNUM, (dcr | DIA1_ENABLE | DIA1_SUP_MODE)); } else if (!(dcr & DIA2_ENABLE)) { write_register (DIA2_REGNUM, addr); write_register (DCR_REGNUM, (dcr | DIA2_ENABLE | DIA2_SUP_MODE)); } else return -1; return 0; } int sparclite_remove_hw_breakpoint (addr, shadow) CORE_ADDR addr; int shadow; { CORE_ADDR dcr, dia1, dia2; dcr = read_register (DCR_REGNUM); dia1 = read_register (DIA1_REGNUM); dia2 = read_register (DIA2_REGNUM); if ((dcr & DIA1_ENABLE) && addr == dia1) write_register (DCR_REGNUM, (dcr & ~DIA1_ENABLE)); else if ((dcr & DIA2_ENABLE) && addr == dia2) write_register (DCR_REGNUM, (dcr & ~DIA2_ENABLE)); else return -1; return 0; } int sparclite_check_watch_resources (type, cnt, ot) int type; int cnt; int ot; { if (type == bp_hardware_breakpoint) if (TARGET_HW_BREAK_LIMIT == 0) return 0; else if (cnt <= TARGET_HW_BREAK_LIMIT) return 1; else if (TARGET_HW_WATCH_LIMIT == 0) return 0; else if (ot) return -1; else if (cnt <= TARGET_HW_WATCH_LIMIT) return 1; return -1; } CORE_ADDR sparclite_stopped_data_address () { CORE_ADDR dsr, dda1, dda2; dsr = read_register (DSR_REGNUM); dda1 = read_register (DDA1_REGNUM); dda2 = read_register (DDA2_REGNUM); if (dsr & 0x10) return dda1; else if (dsr & 0x20) return dda2; else return 0; } static serial_t open_tty (name) char *name; { serial_t desc; desc = SERIAL_OPEN (name); if (!desc) perror_with_name (name); if (baud_rate != -1) { if (SERIAL_SETBAUDRATE (desc, baud_rate)) { SERIAL_CLOSE (desc); perror_with_name (name); } } SERIAL_RAW (desc); SERIAL_FLUSH_INPUT (desc); return desc; } static int send_resp (desc, c) serial_t desc; char c; { int i; SERIAL_WRITE (desc, &c, 1); i = SERIAL_READCHAR (desc, 2); if (i >= 0) return i; switch (i) { case SERIAL_ERROR: perror_with_name ("Remote communication error"); case SERIAL_TIMEOUT: error ("Remote timeout"); case SERIAL_EOF: error ("Remote connection closed"); } } static void close_tty (ignore) int ignore; { if (!remote_desc) return; SERIAL_CLOSE (remote_desc); remote_desc = NULL; } #ifdef HAVE_SOCKETS static int recv_udp_buf (fd, buf, len, timeout) int fd, len; unsigned char *buf; int timeout; { int cc; fd_set readfds; FD_ZERO (&readfds); FD_SET (fd, &readfds); if (timeout >= 0) { struct timeval timebuf; timebuf.tv_sec = timeout; timebuf.tv_usec = 0; cc = select (fd + 1, &readfds, 0, 0, &timebuf); } else cc = select (fd + 1, &readfds, 0, 0, 0); if (cc == 0) return 0; if (cc != 1) perror_with_name ("recv_udp_buf: Bad return value from select:"); cc = recv (fd, buf, len, 0); if (cc < 0) perror_with_name ("Got an error from recv: "); } static int send_udp_buf (fd, buf, len) int fd, len; unsigned char *buf; { int cc; cc = send (fd, buf, len, 0); if (cc == len) return; if (cc < 0) perror_with_name ("Got an error from send: "); error ("Short count in send: tried %d, sent %d\n", len, cc); } #endif /* __GO32__ */ static void sparclite_open (name, from_tty) char *name; int from_tty; { struct cleanup *old_chain; int c; char *p; if (!name) error ("You need to specify what device or hostname is associated with the SparcLite board."); target_preopen (from_tty); unpush_target (&sparclite_ops); if (remote_target_name) free (remote_target_name); remote_target_name = strsave (name); /* We need a 'serial' or 'udp' keyword to disambiguate host:port, which can mean either a serial port on a terminal server, or the IP address of a SPARClite demo board. If there's no colon, then it pretty much has to be a local device (except for DOS... grrmble) */ p = strchr (name, ' '); if (p) { *p++ = '\000'; while ((*p != '\000') && isspace (*p)) p++; if (strncmp (name, "serial", strlen (name)) == 0) serial_flag = 1; else if (strncmp (name, "udp", strlen (name)) == 0) serial_flag = 0; else error ("Must specify either `serial' or `udp'."); } else { p = name; if (!strchr (name, ':')) serial_flag = 1; /* No colon is unambiguous (local device) */ else error ("Usage: target sparclite serial /dev/ttyb\n\ or: target sparclite udp host"); } if (serial_flag) { remote_desc = open_tty (p); old_chain = make_cleanup (close_tty, 0); c = send_resp (remote_desc, 0x00); if (c != 0xaa) error ("Unknown response (0x%x) from SparcLite. Try resetting the board.", c); c = send_resp (remote_desc, 0x55); if (c != 0x55) error ("Sparclite appears to be ill."); } else { #ifdef HAVE_SOCKETS struct hostent *he; struct sockaddr_in sockaddr; unsigned char buffer[100]; int cc; /* Setup the socket. Must be raw UDP. */ he = gethostbyname (p); if (!he) error ("No such host %s.", p); udp_fd = socket (PF_INET, SOCK_DGRAM, 0); old_chain = make_cleanup (close, udp_fd); sockaddr.sin_family = PF_INET; sockaddr.sin_port = htons(7000); memcpy (&sockaddr.sin_addr.s_addr, he->h_addr, sizeof (struct in_addr)); if (connect (udp_fd, &sockaddr, sizeof(sockaddr))) perror_with_name ("Connect failed"); buffer[0] = 0x5; buffer[1] = 0; send_udp_buf (udp_fd, buffer, 2); /* Request version */ cc = recv_udp_buf (udp_fd, buffer, sizeof(buffer), 5); /* Get response */ if (cc == 0) error ("SPARClite isn't responding."); if (cc < 3) error ("SPARClite appears to be ill."); #else error ("UDP downloading is not supported for DOS hosts."); #endif /* __GO32__ */ } printf_unfiltered ("[SPARClite appears to be alive]\n"); push_target (&sparclite_ops); discard_cleanups (old_chain); return; } static void sparclite_close (quitting) int quitting; { if (serial_flag) close_tty (0); #ifdef HAVE_SOCKETS else if (udp_fd != -1) close (udp_fd); #endif } #define LOAD_ADDRESS 0x40000000 static void download (target_name, args, from_tty, write_routine, start_routine) char *target_name; char *args; int from_tty; void (*write_routine)(); void (*start_routine)(); { struct cleanup *old_chain; asection *section; bfd *pbfd; bfd_vma entry; int i; #define WRITESIZE 1024 char *filename; int quiet; int nostart; quiet = 0; nostart = 0; filename = NULL; while (*args != '\000') { char *arg; while (isspace (*args)) args++; arg = args; while ((*args != '\000') && !isspace (*args)) args++; if (*args != '\000') *args++ = '\000'; if (*arg != '-') filename = arg; else if (strncmp (arg, "-quiet", strlen (arg)) == 0) quiet = 1; else if (strncmp (arg, "-nostart", strlen (arg)) == 0) nostart = 1; else error ("unknown option `%s'", arg); } if (!filename) filename = get_exec_file (1); pbfd = bfd_openr (filename, gnutarget); if (pbfd == NULL) { perror_with_name (filename); return; } old_chain = make_cleanup (bfd_close, pbfd); if (!bfd_check_format (pbfd, bfd_object)) error ("\"%s\" is not an object file: %s", filename, bfd_errmsg (bfd_get_error ())); for (section = pbfd->sections; section; section = section->next) { if (bfd_get_section_flags (pbfd, section) & SEC_LOAD) { bfd_vma section_address; bfd_size_type section_size; file_ptr fptr; section_address = bfd_get_section_vma (pbfd, section); /* Adjust sections from a.out files, since they don't carry their addresses with. */ if (bfd_get_flavour (pbfd) == bfd_target_aout_flavour) section_address += LOAD_ADDRESS; section_size = bfd_get_section_size_before_reloc (section); if (!quiet) printf_filtered ("[Loading section %s at 0x%x (%d bytes)]\n", bfd_get_section_name (pbfd, section), section_address, section_size); fptr = 0; while (section_size > 0) { int count; static char inds[] = "|/-\\"; static int k = 0; QUIT; count = min (section_size, WRITESIZE); write_routine (pbfd, section, fptr, section_address, count); if (!quiet) { printf_unfiltered ("\r%c", inds[k++ % 4]); gdb_flush (gdb_stdout); } section_address += count; fptr += count; section_size -= count; } } } if (!nostart) { entry = bfd_get_start_address (pbfd); if (!quiet) printf_unfiltered ("[Starting %s at 0x%x]\n", filename, entry); start_routine (entry); } do_cleanups (old_chain); } static void sparclite_serial_start (entry) bfd_vma entry; { char buffer[5]; int i; buffer[0] = 0x03; store_unsigned_integer (buffer + 1, 4, entry); SERIAL_WRITE (remote_desc, buffer, 1 + 4); i = SERIAL_READCHAR (remote_desc, 2); if (i != 0x55) error ("Can't start SparcLite. Error code %d\n", i); } static void sparclite_serial_write (from_bfd, from_sec, from_addr, to_addr, len) bfd *from_bfd; asection *from_sec; file_ptr from_addr; bfd_vma to_addr; int len; { char buffer[4 + 4 + WRITESIZE]; /* addr + len + data */ unsigned char checksum; int i; store_unsigned_integer (buffer, 4, to_addr); /* Address */ store_unsigned_integer (buffer + 4, 4, len); /* Length */ bfd_get_section_contents (from_bfd, from_sec, buffer + 8, from_addr, len); checksum = 0; for (i = 0; i < len; i++) checksum += buffer[8 + i]; i = send_resp (remote_desc, 0x01); if (i != 0x5a) error ("Bad response from load command (0x%x)", i); SERIAL_WRITE (remote_desc, buffer, 4 + 4 + len); i = SERIAL_READCHAR (remote_desc, 2); if (i < 0) error ("I/O error in serial code. Return code %d\n", i); if (i != checksum) error ("Bad checksum from load command (0x%x)", i); } #ifdef HAVE_SOCKETS static unsigned short calc_checksum (buffer, count) unsigned char *buffer; int count; { unsigned short checksum; checksum = 0; for (; count > 0; count -= 2, buffer += 2) checksum += (*buffer << 8) | *(buffer + 1); if (count != 0) checksum += *buffer << 8; return checksum; } static void sparclite_udp_start (entry) bfd_vma entry; { unsigned char buffer[6]; int i; buffer[0] = 0x3; buffer[1] = 0; buffer[2] = entry >> 24; buffer[3] = entry >> 16; buffer[4] = entry >> 8; buffer[5] = entry; send_udp_buf (udp_fd, buffer, 6); /* Send start addr */ i = recv_udp_buf (udp_fd, buffer, sizeof(buffer), -1); /* Get response */ if (i < 1 || buffer[0] != 0x55) error ("Failed to take start address."); } static void sparclite_udp_write (from_bfd, from_sec, from_addr, to_addr, len) bfd *from_bfd; asection *from_sec; file_ptr from_addr; bfd_vma to_addr; int len; { unsigned char buffer[2000]; unsigned short checksum; static int pkt_num = 0; static unsigned long old_addr = -1; int i; while (1) { if (to_addr != old_addr) { buffer[0] = 0x1; /* Load command */ buffer[1] = 0x1; /* Loading address */ buffer[2] = to_addr >> 24; buffer[3] = to_addr >> 16; buffer[4] = to_addr >> 8; buffer[5] = to_addr; checksum = 0; for (i = 0; i < 6; i++) checksum += buffer[i]; checksum &= 0xff; send_udp_buf (udp_fd, buffer, 6); i = recv_udp_buf (udp_fd, buffer, sizeof buffer, -1); if (i < 1) error ("Got back short checksum for load addr."); if (checksum != buffer[0]) error ("Got back bad checksum for load addr."); pkt_num = 0; /* Load addr resets packet seq # */ old_addr = to_addr; } bfd_get_section_contents (from_bfd, from_sec, buffer + 6, from_addr, len); checksum = calc_checksum (buffer + 6, len); buffer[0] = 0x1; /* Load command */ buffer[1] = 0x2; /* Loading data */ buffer[2] = pkt_num >> 8; buffer[3] = pkt_num; buffer[4] = checksum >> 8; buffer[5] = checksum; send_udp_buf (udp_fd, buffer, len + 6); i = recv_udp_buf (udp_fd, buffer, sizeof buffer, 3); if (i == 0) { fprintf_unfiltered (gdb_stderr, "send_data: timeout sending %d bytes to address 0x%x retrying\n", len, to_addr); continue; } if (buffer[0] != 0xff) error ("Got back bad response for load data."); old_addr += len; pkt_num++; return; } } #endif /* __GO32__ */ static void sparclite_download (filename, from_tty) char *filename; int from_tty; { if (!serial_flag) #ifdef HAVE_SOCKETS download (remote_target_name, filename, from_tty, sparclite_udp_write, sparclite_udp_start); #else abort (); /* sparclite_open should prevent this! */ #endif else download (remote_target_name, filename, from_tty, sparclite_serial_write, sparclite_serial_start); } /* Define the target subroutine names */ static struct target_ops sparclite_ops = { "sparclite", /* to_shortname */ "SPARClite remote target", /* to_longname */ "Use a remote SPARClite target board via a serial line, using a gdb-specific protocol.\n\ Specify the serial device it is connected to (e.g. /dev/ttya).", /* to_doc */ sparclite_open, /* to_open */ sparclite_close, /* to_close */ 0, /* to_attach */ 0, /* to_detach */ 0, /* to_resume */ 0, /* to_wait */ 0, /* to_fetch_registers */ 0, /* to_store_registers */ 0, /* to_prepare_to_store */ 0, /* to_xfer_memory */ 0, /* to_files_info */ 0, /* to_insert_breakpoint */ 0, /* to_remove_breakpoint */ 0, /* to_terminal_init */ 0, /* to_terminal_inferior */ 0, /* to_terminal_ours_for_output */ 0, /* to_terminal_ours */ 0, /* to_terminal_info */ 0, /* to_kill */ sparclite_download, /* to_load */ 0, /* to_lookup_symbol */ 0, /* to_create_inferior */ 0, /* to_mourn_inferior */ 0, /* to_can_run */ 0, /* to_notice_signals */ 0, /* to_thread_alive */ 0, /* to_stop */ download_stratum, /* to_stratum */ 0, /* to_next */ 0, /* to_has_all_memory */ 0, /* to_has_memory */ 0, /* to_has_stack */ 0, /* to_has_registers */ 0, /* to_has_execution */ 0, /* sections */ 0, /* sections_end */ OPS_MAGIC /* to_magic */ }; void _initialize_sparcl_tdep () { add_target (&sparclite_ops); }