| /* Remote debugging for the ARM RDP interface. |
| |
| Copyright 1994, 1995, 1998, 1999, 2000, 2001, 2002, 2003 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., 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. |
| |
| |
| */ |
| |
| |
| /* |
| Much of this file (in particular the SWI stuff) is based on code by |
| David Taylor (djt1000@uk.ac.cam.hermes). |
| |
| I hacked on and simplified it by removing a lot of sexy features he |
| had added, and some of the (unix specific) workarounds he'd done |
| for other GDB problems - which if they still exist should be fixed |
| in GDB, not in a remote-foo thing . I also made it conform more to |
| the doc I have; which may be wrong. |
| |
| Steve Chamberlain (sac@cygnus.com). |
| */ |
| |
| |
| #include "defs.h" |
| #include "inferior.h" |
| #include "value.h" |
| #include "gdb/callback.h" |
| #include "command.h" |
| #include <ctype.h> |
| #include <fcntl.h> |
| #include "symfile.h" |
| #include "remote-utils.h" |
| #include "gdb_string.h" |
| #include "gdbcore.h" |
| #include "regcache.h" |
| #include "serial.h" |
| |
| #include "arm-tdep.h" |
| |
| #ifdef HAVE_TIME_H |
| #include <time.h> |
| #endif |
| |
| extern struct target_ops remote_rdp_ops; |
| static struct serial *io; |
| static host_callback *callback = &default_callback; |
| |
| struct |
| { |
| int step_info; |
| int break_info; |
| int model_info; |
| int target_info; |
| int can_step; |
| char command_line[10]; |
| int rdi_level; |
| int rdi_stopped_status; |
| } |
| ds; |
| |
| |
| |
| /* Definitions for the RDP protocol. */ |
| |
| #define RDP_MOUTHFULL (1<<6) |
| #define FPU_COPRO_NUMBER 1 |
| |
| #define RDP_OPEN 0 |
| #define RDP_OPEN_TYPE_COLD 0 |
| #define RDP_OPEN_TYPE_WARM 1 |
| #define RDP_OPEN_TYPE_BAUDRATE 2 |
| |
| #define RDP_OPEN_BAUDRATE_9600 1 |
| #define RDP_OPEN_BAUDRATE_19200 2 |
| #define RDP_OPEN_BAUDRATE_38400 3 |
| |
| #define RDP_OPEN_TYPE_RETURN_SEX (1<<3) |
| |
| #define RDP_CLOSE 1 |
| |
| #define RDP_MEM_READ 2 |
| |
| #define RDP_MEM_WRITE 3 |
| |
| #define RDP_CPU_READ 4 |
| #define RDP_CPU_WRITE 5 |
| #define RDP_CPU_READWRITE_MODE_CURRENT 255 |
| #define RDP_CPU_READWRITE_MASK_PC (1<<16) |
| #define RDP_CPU_READWRITE_MASK_CPSR (1<<17) |
| #define RDP_CPU_READWRITE_MASK_SPSR (1<<18) |
| |
| #define RDP_COPRO_READ 6 |
| #define RDP_COPRO_WRITE 7 |
| #define RDP_FPU_READWRITE_MASK_FPS (1<<8) |
| |
| #define RDP_SET_BREAK 0xa |
| #define RDP_SET_BREAK_TYPE_PC_EQUAL 0 |
| #define RDP_SET_BREAK_TYPE_GET_HANDLE (0x10) |
| |
| #define RDP_CLEAR_BREAK 0xb |
| |
| #define RDP_EXEC 0x10 |
| #define RDP_EXEC_TYPE_SYNC 0 |
| |
| #define RDP_STEP 0x11 |
| |
| #define RDP_INFO 0x12 |
| #define RDP_INFO_ABOUT_STEP 2 |
| #define RDP_INFO_ABOUT_STEP_GT_1 1 |
| #define RDP_INFO_ABOUT_STEP_TO_JMP 2 |
| #define RDP_INFO_ABOUT_STEP_1 4 |
| #define RDP_INFO_ABOUT_TARGET 0 |
| #define RDP_INFO_ABOUT_BREAK 1 |
| #define RDP_INFO_ABOUT_BREAK_COMP 1 |
| #define RDP_INFO_ABOUT_BREAK_RANGE 2 |
| #define RDP_INFO_ABOUT_BREAK_BYTE_READ 4 |
| #define RDP_INFO_ABOUT_BREAK_HALFWORD_READ 8 |
| #define RDP_INFO_ABOUT_BREAK_WORD_READ (1<<4) |
| #define RDP_INFO_ABOUT_BREAK_BYTE_WRITE (1<<5) |
| #define RDP_INFO_ABOUT_BREAK_HALFWORD_WRITE (1<<6) |
| #define RDP_INFO_ABOUT_BREAK_WORD_WRITE (1<<7) |
| #define RDP_INFO_ABOUT_BREAK_MASK (1<<8) |
| #define RDP_INFO_ABOUT_BREAK_THREAD_BREAK (1<<9) |
| #define RDP_INFO_ABOUT_BREAK_THREAD_WATCH (1<<10) |
| #define RDP_INFO_ABOUT_BREAK_COND (1<<11) |
| #define RDP_INFO_VECTOR_CATCH (0x180) |
| #define RDP_INFO_ICEBREAKER (7) |
| #define RDP_INFO_SET_CMDLINE (0x300) |
| |
| #define RDP_SELECT_CONFIG (0x16) |
| #define RDI_ConfigCPU 0 |
| #define RDI_ConfigSystem 1 |
| #define RDI_MatchAny 0 |
| #define RDI_MatchExactly 1 |
| #define RDI_MatchNoEarlier 2 |
| |
| #define RDP_RESET 0x7f |
| |
| /* Returns from RDP */ |
| #define RDP_RES_STOPPED 0x20 |
| #define RDP_RES_SWI 0x21 |
| #define RDP_RES_FATAL 0x5e |
| #define RDP_RES_VALUE 0x5f |
| #define RDP_RES_VALUE_LITTLE_ENDIAN 240 |
| #define RDP_RES_VALUE_BIG_ENDIAN 241 |
| #define RDP_RES_RESET 0x7f |
| #define RDP_RES_AT_BREAKPOINT 143 |
| #define RDP_RES_IDUNNO 0xe6 |
| #define RDP_OSOpReply 0x13 |
| #define RDP_OSOpWord 2 |
| #define RDP_OSOpNothing 0 |
| |
| static int timeout = 2; |
| |
| static char *commandline = NULL; |
| |
| static int |
| remote_rdp_xfer_inferior_memory (CORE_ADDR memaddr, char *myaddr, int len, |
| int write, |
| struct mem_attrib *attrib, |
| struct target_ops *target); |
| |
| |
| /* Stuff for talking to the serial layer. */ |
| |
| static unsigned char |
| get_byte (void) |
| { |
| int c = serial_readchar (io, timeout); |
| |
| if (remote_debug) |
| fprintf_unfiltered (gdb_stdlog, "[%02x]\n", c); |
| |
| if (c == SERIAL_TIMEOUT) |
| { |
| if (timeout == 0) |
| return (unsigned char) c; |
| |
| error ("Timeout reading from remote_system"); |
| } |
| |
| return c; |
| } |
| |
| /* Note that the target always speaks little-endian to us, |
| even if it's a big endian machine. */ |
| static unsigned int |
| get_word (void) |
| { |
| unsigned int val = 0; |
| unsigned int c; |
| int n; |
| for (n = 0; n < 4; n++) |
| { |
| c = get_byte (); |
| val |= c << (n * 8); |
| } |
| return val; |
| } |
| |
| static void |
| put_byte (char val) |
| { |
| if (remote_debug) |
| fprintf_unfiltered (gdb_stdlog, "(%02x)\n", val); |
| serial_write (io, &val, 1); |
| } |
| |
| static void |
| put_word (int val) |
| { |
| /* We always send in little endian */ |
| unsigned char b[4]; |
| b[0] = val; |
| b[1] = val >> 8; |
| b[2] = val >> 16; |
| b[3] = val >> 24; |
| |
| if (remote_debug) |
| fprintf_unfiltered (gdb_stdlog, "(%04x)", val); |
| |
| serial_write (io, b, 4); |
| } |
| |
| |
| |
| /* Stuff for talking to the RDP layer. */ |
| |
| /* This is a bit more fancy that need be so that it syncs even in nasty cases. |
| |
| I'be been unable to make it reliably sync up with the change |
| baudrate open command. It likes to sit and say it's been reset, |
| with no more action. So I took all that code out. I'd rather sync |
| reliably at 9600 than wait forever for a possible 19200 connection. |
| |
| */ |
| static void |
| rdp_init (int cold, int tty) |
| { |
| int sync = 0; |
| int type = cold ? RDP_OPEN_TYPE_COLD : RDP_OPEN_TYPE_WARM; |
| int baudtry = 9600; |
| |
| time_t now = time (0); |
| time_t stop_time = now + 10; /* Try and sync for 10 seconds, then give up */ |
| |
| |
| while (time (0) < stop_time && !sync) |
| { |
| int restype; |
| QUIT; |
| |
| serial_flush_input (io); |
| serial_flush_output (io); |
| |
| if (tty) |
| printf_unfiltered ("Trying to connect at %d baud.\n", baudtry); |
| |
| /* |
| ** It seems necessary to reset an EmbeddedICE to get it going. |
| ** This has the side benefit of displaying the startup banner. |
| */ |
| if (cold) |
| { |
| put_byte (RDP_RESET); |
| while ((restype = serial_readchar (io, 1)) > 0) |
| { |
| switch (restype) |
| { |
| case SERIAL_TIMEOUT: |
| break; |
| case RDP_RESET: |
| /* Sent at start of reset process: ignore */ |
| break; |
| default: |
| printf_unfiltered ("%c", isgraph (restype) ? restype : ' '); |
| break; |
| } |
| } |
| |
| if (restype == 0) |
| { |
| /* Got end-of-banner mark */ |
| printf_filtered ("\n"); |
| } |
| } |
| |
| put_byte (RDP_OPEN); |
| |
| put_byte (type | RDP_OPEN_TYPE_RETURN_SEX); |
| put_word (0); |
| |
| while (!sync && (restype = serial_readchar (io, 1)) > 0) |
| { |
| if (remote_debug) |
| fprintf_unfiltered (gdb_stdlog, "[%02x]\n", restype); |
| |
| switch (restype) |
| { |
| case SERIAL_TIMEOUT: |
| break; |
| |
| case RDP_RESET: |
| while ((restype = serial_readchar (io, 1)) == RDP_RESET) |
| ; |
| do |
| { |
| printf_unfiltered ("%c", isgraph (restype) ? restype : ' '); |
| } |
| while ((restype = serial_readchar (io, 1)) > 0); |
| |
| if (tty) |
| { |
| printf_unfiltered ("\nThe board has sent notification that it was reset.\n"); |
| printf_unfiltered ("Waiting for it to settle down...\n"); |
| } |
| sleep (3); |
| if (tty) |
| printf_unfiltered ("\nTrying again.\n"); |
| cold = 0; |
| break; |
| |
| default: |
| break; |
| |
| case RDP_RES_VALUE: |
| { |
| int resval = serial_readchar (io, 1); |
| |
| if (remote_debug) |
| fprintf_unfiltered (gdb_stdlog, "[%02x]\n", resval); |
| |
| switch (resval) |
| { |
| case SERIAL_TIMEOUT: |
| break; |
| case RDP_RES_VALUE_LITTLE_ENDIAN: |
| #if 0 |
| /* FIXME: cagney/2003-11-22: Ever since the ARM |
| was multi-arched (in 2002-02-08), this |
| assignment has had no effect. There needs to |
| be some sort of check/decision based on the |
| current architecture's byte-order vs the remote |
| target's byte order. For the moment disable |
| the assignment to keep things building. */ |
| target_byte_order = BFD_ENDIAN_LITTLE; |
| #endif |
| sync = 1; |
| break; |
| case RDP_RES_VALUE_BIG_ENDIAN: |
| #if 0 |
| /* FIXME: cagney/2003-11-22: Ever since the ARM |
| was multi-arched (in 2002-02-08), this |
| assignment has had no effect. There needs to |
| be some sort of check/decision based on the |
| current architecture's byte-order vs the remote |
| target's byte order. For the moment disable |
| the assignment to keep things building. */ |
| target_byte_order = BFD_ENDIAN_BIG; |
| #endif |
| sync = 1; |
| break; |
| default: |
| break; |
| } |
| } |
| } |
| } |
| } |
| |
| if (!sync) |
| { |
| error ("Couldn't reset the board, try pressing the reset button"); |
| } |
| } |
| |
| |
| static void |
| send_rdp (char *template,...) |
| { |
| char buf[200]; |
| char *dst = buf; |
| va_list alist; |
| va_start (alist, template); |
| |
| while (*template) |
| { |
| unsigned int val; |
| int *pi; |
| int *pstat; |
| char *pc; |
| int i; |
| switch (*template++) |
| { |
| case 'b': |
| val = va_arg (alist, int); |
| *dst++ = val; |
| break; |
| case 'w': |
| val = va_arg (alist, int); |
| *dst++ = val; |
| *dst++ = val >> 8; |
| *dst++ = val >> 16; |
| *dst++ = val >> 24; |
| break; |
| case 'S': |
| val = get_byte (); |
| if (val != RDP_RES_VALUE) |
| { |
| printf_unfiltered ("got bad res value of %d, %x\n", val, val); |
| } |
| break; |
| case 'V': |
| pstat = va_arg (alist, int *); |
| pi = va_arg (alist, int *); |
| |
| *pstat = get_byte (); |
| /* Check the result was zero, if not read the syndrome */ |
| if (*pstat) |
| { |
| *pi = get_word (); |
| } |
| break; |
| case 'Z': |
| /* Check the result code */ |
| switch (get_byte ()) |
| { |
| case 0: |
| /* Success */ |
| break; |
| case 253: |
| /* Target can't do it; never mind */ |
| printf_unfiltered ("RDP: Insufficient privilege\n"); |
| return; |
| case 254: |
| /* Target can't do it; never mind */ |
| printf_unfiltered ("RDP: Unimplemented message\n"); |
| return; |
| case 255: |
| error ("Command garbled"); |
| break; |
| default: |
| error ("Corrupt reply from target"); |
| break; |
| } |
| break; |
| case 'W': |
| /* Read a word from the target */ |
| pi = va_arg (alist, int *); |
| *pi = get_word (); |
| break; |
| case 'P': |
| /* Read in some bytes from the target. */ |
| pc = va_arg (alist, char *); |
| val = va_arg (alist, int); |
| for (i = 0; i < val; i++) |
| { |
| pc[i] = get_byte (); |
| } |
| break; |
| case 'p': |
| /* send what's being pointed at */ |
| pc = va_arg (alist, char *); |
| val = va_arg (alist, int); |
| dst = buf; |
| serial_write (io, pc, val); |
| break; |
| case '-': |
| /* Send whats in the queue */ |
| if (dst != buf) |
| { |
| serial_write (io, buf, dst - buf); |
| dst = buf; |
| } |
| break; |
| case 'B': |
| pi = va_arg (alist, int *); |
| *pi = get_byte (); |
| break; |
| default: |
| internal_error (__FILE__, __LINE__, "failed internal consistency check"); |
| } |
| } |
| va_end (alist); |
| |
| if (dst != buf) |
| internal_error (__FILE__, __LINE__, "failed internal consistency check"); |
| } |
| |
| |
| static int |
| rdp_write (CORE_ADDR memaddr, char *buf, int len) |
| { |
| int res; |
| int val; |
| |
| send_rdp ("bww-p-SV", RDP_MEM_WRITE, memaddr, len, buf, len, &res, &val); |
| |
| if (res) |
| { |
| return val; |
| } |
| return len; |
| } |
| |
| |
| static int |
| rdp_read (CORE_ADDR memaddr, char *buf, int len) |
| { |
| int res; |
| int val; |
| send_rdp ("bww-S-P-V", |
| RDP_MEM_READ, memaddr, len, |
| buf, len, |
| &res, &val); |
| if (res) |
| { |
| return val; |
| } |
| return len; |
| } |
| |
| static void |
| rdp_fetch_one_register (int mask, char *buf) |
| { |
| int val; |
| send_rdp ("bbw-SWZ", RDP_CPU_READ, RDP_CPU_READWRITE_MODE_CURRENT, mask, &val); |
| store_signed_integer (buf, 4, val); |
| } |
| |
| static void |
| rdp_fetch_one_fpu_register (int mask, char *buf) |
| { |
| #if 0 |
| /* !!! Since the PIE board doesn't work as documented, |
| and it doesn't have FPU hardware anyway and since it |
| slows everything down, I've disabled this. */ |
| int val; |
| if (mask == RDP_FPU_READWRITE_MASK_FPS) |
| { |
| /* this guy is only a word */ |
| send_rdp ("bbw-SWZ", RDP_COPRO_READ, FPU_COPRO_NUMBER, mask, &val); |
| store_signed_integer (buf, 4, val); |
| } |
| else |
| { |
| /* There are 12 bytes long |
| !! fixme about endianness |
| */ |
| int dummy; /* I've seen these come back as four words !! */ |
| send_rdp ("bbw-SWWWWZ", RDP_COPRO_READ, FPU_COPRO_NUMBER, mask, buf + 0, buf + 4, buf + 8, &dummy); |
| } |
| #endif |
| memset (buf, 0, MAX_REGISTER_SIZE); |
| } |
| |
| |
| static void |
| rdp_store_one_register (int mask, char *buf) |
| { |
| int val = extract_unsigned_integer (buf, 4); |
| |
| send_rdp ("bbww-SZ", |
| RDP_CPU_WRITE, RDP_CPU_READWRITE_MODE_CURRENT, mask, val); |
| } |
| |
| |
| static void |
| rdp_store_one_fpu_register (int mask, char *buf) |
| { |
| #if 0 |
| /* See comment in fetch_one_fpu_register */ |
| if (mask == RDP_FPU_READWRITE_MASK_FPS) |
| { |
| int val = extract_unsigned_integer (buf, 4); |
| /* this guy is only a word */ |
| send_rdp ("bbww-SZ", RDP_COPRO_WRITE, |
| FPU_COPRO_NUMBER, |
| mask, val); |
| } |
| else |
| { |
| /* There are 12 bytes long |
| !! fixme about endianness |
| */ |
| int dummy = 0; |
| /* I've seen these come as four words, not the three advertized !! */ |
| printf ("Sending mask %x\n", mask); |
| send_rdp ("bbwwwww-SZ", |
| RDP_COPRO_WRITE, |
| FPU_COPRO_NUMBER, |
| mask, |
| *(int *) (buf + 0), |
| *(int *) (buf + 4), |
| *(int *) (buf + 8), |
| 0); |
| |
| printf ("done mask %x\n", mask); |
| } |
| #endif |
| } |
| |
| |
| /* Convert between GDB requests and the RDP layer. */ |
| |
| static void |
| remote_rdp_fetch_register (int regno) |
| { |
| if (regno == -1) |
| { |
| for (regno = 0; regno < NUM_REGS; regno++) |
| remote_rdp_fetch_register (regno); |
| } |
| else |
| { |
| char buf[ARM_MAX_REGISTER_RAW_SIZE]; |
| if (regno < 15) |
| rdp_fetch_one_register (1 << regno, buf); |
| else if (regno == ARM_PC_REGNUM) |
| rdp_fetch_one_register (RDP_CPU_READWRITE_MASK_PC, buf); |
| else if (regno == ARM_PS_REGNUM) |
| rdp_fetch_one_register (RDP_CPU_READWRITE_MASK_CPSR, buf); |
| else if (regno == ARM_FPS_REGNUM) |
| rdp_fetch_one_fpu_register (RDP_FPU_READWRITE_MASK_FPS, buf); |
| else if (regno >= ARM_F0_REGNUM && regno <= ARM_F7_REGNUM) |
| rdp_fetch_one_fpu_register (1 << (regno - ARM_F0_REGNUM), buf); |
| else |
| { |
| printf ("Help me with fetch reg %d\n", regno); |
| } |
| supply_register (regno, buf); |
| } |
| } |
| |
| |
| static void |
| remote_rdp_store_register (int regno) |
| { |
| if (regno == -1) |
| { |
| for (regno = 0; regno < NUM_REGS; regno++) |
| remote_rdp_store_register (regno); |
| } |
| else |
| { |
| char tmp[ARM_MAX_REGISTER_RAW_SIZE]; |
| deprecated_read_register_gen (regno, tmp); |
| if (regno < 15) |
| rdp_store_one_register (1 << regno, tmp); |
| else if (regno == ARM_PC_REGNUM) |
| rdp_store_one_register (RDP_CPU_READWRITE_MASK_PC, tmp); |
| else if (regno == ARM_PS_REGNUM) |
| rdp_store_one_register (RDP_CPU_READWRITE_MASK_CPSR, tmp); |
| else if (regno >= ARM_F0_REGNUM && regno <= ARM_F7_REGNUM) |
| rdp_store_one_fpu_register (1 << (regno - ARM_F0_REGNUM), tmp); |
| else |
| { |
| printf ("Help me with reg %d\n", regno); |
| } |
| } |
| } |
| |
| static void |
| remote_rdp_kill (void) |
| { |
| callback->shutdown (callback); |
| } |
| |
| |
| static void |
| rdp_info (void) |
| { |
| send_rdp ("bw-S-W-Z", RDP_INFO, RDP_INFO_ABOUT_STEP, |
| &ds.step_info); |
| send_rdp ("bw-S-W-Z", RDP_INFO, RDP_INFO_ABOUT_BREAK, |
| &ds.break_info); |
| send_rdp ("bw-S-WW-Z", RDP_INFO, RDP_INFO_ABOUT_TARGET, |
| &ds.target_info, |
| &ds.model_info); |
| |
| ds.can_step = ds.step_info & RDP_INFO_ABOUT_STEP_1; |
| |
| ds.rdi_level = (ds.target_info >> 5) & 3; |
| } |
| |
| |
| static void |
| rdp_execute_start (void) |
| { |
| /* Start it off, but don't wait for it */ |
| send_rdp ("bb-", RDP_EXEC, RDP_EXEC_TYPE_SYNC); |
| } |
| |
| |
| static void |
| rdp_set_command_line (char *command, char *args) |
| { |
| /* |
| ** We could use RDP_INFO_SET_CMDLINE to send this, but EmbeddedICE systems |
| ** don't implement that, and get all confused at the unexpected text. |
| ** Instead, just keep a copy, and send it when the target does a SWI_GetEnv |
| */ |
| |
| if (commandline != NULL) |
| xfree (commandline); |
| |
| xasprintf (&commandline, "%s %s", command, args); |
| } |
| |
| static void |
| rdp_catch_vectors (void) |
| { |
| /* |
| ** We want the target monitor to intercept the abort vectors |
| ** i.e. stop the program if any of these are used. |
| */ |
| send_rdp ("bww-SZ", RDP_INFO, RDP_INFO_VECTOR_CATCH, |
| /* |
| ** Specify a bitmask including |
| ** the reset vector |
| ** the undefined instruction vector |
| ** the prefetch abort vector |
| ** the data abort vector |
| ** the address exception vector |
| */ |
| (1 << 0) | (1 << 1) | (1 << 3) | (1 << 4) | (1 << 5) |
| ); |
| } |
| |
| |
| |
| #define a_byte 1 |
| #define a_word 2 |
| #define a_string 3 |
| |
| |
| typedef struct |
| { |
| CORE_ADDR n; |
| const char *s; |
| } |
| argsin; |
| |
| #define ABYTE 1 |
| #define AWORD 2 |
| #define ASTRING 3 |
| #define ADDRLEN 4 |
| |
| #define SWI_WriteC 0x0 |
| #define SWI_Write0 0x2 |
| #define SWI_ReadC 0x4 |
| #define SWI_CLI 0x5 |
| #define SWI_GetEnv 0x10 |
| #define SWI_Exit 0x11 |
| #define SWI_EnterOS 0x16 |
| |
| #define SWI_GetErrno 0x60 |
| #define SWI_Clock 0x61 |
| |
| #define SWI_Time 0x63 |
| #define SWI_Remove 0x64 |
| #define SWI_Rename 0x65 |
| #define SWI_Open 0x66 |
| |
| #define SWI_Close 0x68 |
| #define SWI_Write 0x69 |
| #define SWI_Read 0x6a |
| #define SWI_Seek 0x6b |
| #define SWI_Flen 0x6c |
| |
| #define SWI_IsTTY 0x6e |
| #define SWI_TmpNam 0x6f |
| #define SWI_InstallHandler 0x70 |
| #define SWI_GenerateError 0x71 |
| |
| |
| #ifndef O_BINARY |
| #define O_BINARY 0 |
| #endif |
| |
| static int translate_open_mode[] = |
| { |
| O_RDONLY, /* "r" */ |
| O_RDONLY + O_BINARY, /* "rb" */ |
| O_RDWR, /* "r+" */ |
| O_RDWR + O_BINARY, /* "r+b" */ |
| O_WRONLY + O_CREAT + O_TRUNC, /* "w" */ |
| O_WRONLY + O_BINARY + O_CREAT + O_TRUNC, /* "wb" */ |
| O_RDWR + O_CREAT + O_TRUNC, /* "w+" */ |
| O_RDWR + O_BINARY + O_CREAT + O_TRUNC, /* "w+b" */ |
| O_WRONLY + O_APPEND + O_CREAT, /* "a" */ |
| O_WRONLY + O_BINARY + O_APPEND + O_CREAT, /* "ab" */ |
| O_RDWR + O_APPEND + O_CREAT, /* "a+" */ |
| O_RDWR + O_BINARY + O_APPEND + O_CREAT /* "a+b" */ |
| }; |
| |
| static int |
| exec_swi (int swi, argsin *args) |
| { |
| int i; |
| char c; |
| switch (swi) |
| { |
| case SWI_WriteC: |
| callback->write_stdout (callback, &c, 1); |
| return 0; |
| case SWI_Write0: |
| for (i = 0; i < args->n; i++) |
| callback->write_stdout (callback, args->s, strlen (args->s)); |
| return 0; |
| case SWI_ReadC: |
| callback->read_stdin (callback, &c, 1); |
| args->n = c; |
| return 1; |
| case SWI_CLI: |
| args->n = callback->system (callback, args->s); |
| return 1; |
| case SWI_GetErrno: |
| args->n = callback->get_errno (callback); |
| return 1; |
| case SWI_Time: |
| args->n = callback->time (callback, NULL); |
| return 1; |
| |
| case SWI_Clock: |
| /* return number of centi-seconds... */ |
| args->n = |
| #ifdef CLOCKS_PER_SEC |
| (CLOCKS_PER_SEC >= 100) |
| ? (clock () / (CLOCKS_PER_SEC / 100)) |
| : ((clock () * 100) / CLOCKS_PER_SEC); |
| #else |
| /* presume unix... clock() returns microseconds */ |
| clock () / 10000; |
| #endif |
| return 1; |
| |
| case SWI_Remove: |
| args->n = callback->unlink (callback, args->s); |
| return 1; |
| case SWI_Rename: |
| args->n = callback->rename (callback, args[0].s, args[1].s); |
| return 1; |
| |
| case SWI_Open: |
| /* Now we need to decode the Demon open mode */ |
| i = translate_open_mode[args[1].n]; |
| |
| /* Filename ":tt" is special: it denotes stdin/out */ |
| if (strcmp (args->s, ":tt") == 0) |
| { |
| if (i == O_RDONLY) /* opening tty "r" */ |
| args->n = 0 /* stdin */ ; |
| else |
| args->n = 1 /* stdout */ ; |
| } |
| else |
| args->n = callback->open (callback, args->s, i); |
| return 1; |
| |
| case SWI_Close: |
| args->n = callback->close (callback, args->n); |
| return 1; |
| |
| case SWI_Write: |
| /* Return the number of bytes *not* written */ |
| args->n = args[1].n - |
| callback->write (callback, args[0].n, args[1].s, args[1].n); |
| return 1; |
| |
| case SWI_Read: |
| { |
| char *copy = alloca (args[2].n); |
| int done = callback->read (callback, args[0].n, copy, args[2].n); |
| if (done > 0) |
| remote_rdp_xfer_inferior_memory (args[1].n, copy, done, 1, 0, 0); |
| args->n = args[2].n - done; |
| return 1; |
| } |
| |
| case SWI_Seek: |
| /* Return non-zero on failure */ |
| args->n = callback->lseek (callback, args[0].n, args[1].n, 0) < 0; |
| return 1; |
| |
| case SWI_Flen: |
| { |
| long old = callback->lseek (callback, args->n, 0, SEEK_CUR); |
| args->n = callback->lseek (callback, args->n, 0, SEEK_END); |
| callback->lseek (callback, args->n, old, 0); |
| return 1; |
| } |
| |
| case SWI_IsTTY: |
| args->n = callback->isatty (callback, args->n); |
| return 1; |
| |
| case SWI_GetEnv: |
| if (commandline != NULL) |
| { |
| int len = strlen (commandline); |
| if (len > 255) |
| { |
| len = 255; |
| commandline[255] = '\0'; |
| } |
| remote_rdp_xfer_inferior_memory (args[0].n, |
| commandline, len + 1, 1, 0, 0); |
| } |
| else |
| remote_rdp_xfer_inferior_memory (args[0].n, "", 1, 1, 0, 0); |
| return 1; |
| |
| default: |
| return 0; |
| } |
| } |
| |
| |
| static void |
| handle_swi (void) |
| { |
| argsin args[3]; |
| char *buf; |
| int len; |
| int count = 0; |
| |
| int swino = get_word (); |
| int type = get_byte (); |
| while (type != 0) |
| { |
| switch (type & 0x3) |
| { |
| case ABYTE: |
| args[count].n = get_byte (); |
| break; |
| |
| case AWORD: |
| args[count].n = get_word (); |
| break; |
| |
| case ASTRING: |
| /* If the word is under 32 bytes it will be sent otherwise |
| an address to it is passed. Also: Special case of 255 */ |
| |
| len = get_byte (); |
| if (len > 32) |
| { |
| if (len == 255) |
| { |
| len = get_word (); |
| } |
| buf = alloca (len); |
| remote_rdp_xfer_inferior_memory (get_word (), |
| buf, |
| len, |
| 0, |
| 0, |
| 0); |
| } |
| else |
| { |
| int i; |
| buf = alloca (len + 1); |
| for (i = 0; i < len; i++) |
| buf[i] = get_byte (); |
| buf[i] = 0; |
| } |
| args[count].n = len; |
| args[count].s = buf; |
| break; |
| |
| default: |
| error ("Unimplemented SWI argument"); |
| } |
| |
| type = type >> 2; |
| count++; |
| } |
| |
| if (exec_swi (swino, args)) |
| { |
| /* We have two options here reply with either a byte or a word |
| which is stored in args[0].n. There is no harm in replying with |
| a word all the time, so thats what I do! */ |
| send_rdp ("bbw-", RDP_OSOpReply, RDP_OSOpWord, args[0].n); |
| } |
| else |
| { |
| send_rdp ("bb-", RDP_OSOpReply, RDP_OSOpNothing); |
| } |
| } |
| |
| static void |
| rdp_execute_finish (void) |
| { |
| int running = 1; |
| |
| while (running) |
| { |
| int res; |
| res = serial_readchar (io, 1); |
| while (res == SERIAL_TIMEOUT) |
| { |
| QUIT; |
| printf_filtered ("Waiting for target..\n"); |
| res = serial_readchar (io, 1); |
| } |
| |
| switch (res) |
| { |
| case RDP_RES_SWI: |
| handle_swi (); |
| break; |
| case RDP_RES_VALUE: |
| send_rdp ("B", &ds.rdi_stopped_status); |
| running = 0; |
| break; |
| case RDP_RESET: |
| printf_filtered ("Target reset\n"); |
| running = 0; |
| break; |
| default: |
| printf_filtered ("Ignoring %x\n", res); |
| break; |
| } |
| } |
| } |
| |
| |
| static void |
| rdp_execute (void) |
| { |
| rdp_execute_start (); |
| rdp_execute_finish (); |
| } |
| |
| static int |
| remote_rdp_insert_breakpoint (CORE_ADDR addr, char *save) |
| { |
| int res; |
| if (ds.rdi_level > 0) |
| { |
| send_rdp ("bwb-SWB", |
| RDP_SET_BREAK, |
| addr, |
| RDP_SET_BREAK_TYPE_PC_EQUAL | RDP_SET_BREAK_TYPE_GET_HANDLE, |
| save, |
| &res); |
| } |
| else |
| { |
| send_rdp ("bwb-SB", |
| RDP_SET_BREAK, |
| addr, |
| RDP_SET_BREAK_TYPE_PC_EQUAL, |
| &res); |
| } |
| return res; |
| } |
| |
| static int |
| remote_rdp_remove_breakpoint (CORE_ADDR addr, char *save) |
| { |
| int res; |
| if (ds.rdi_level > 0) |
| { |
| send_rdp ("b-p-S-B", |
| RDP_CLEAR_BREAK, |
| save, 4, |
| &res); |
| } |
| else |
| { |
| send_rdp ("bw-S-B", |
| RDP_CLEAR_BREAK, |
| addr, |
| &res); |
| } |
| return res; |
| } |
| |
| static void |
| rdp_step (void) |
| { |
| if (ds.can_step && 0) |
| { |
| /* The pie board can't do steps so I can't test this, and |
| the other code will always work. */ |
| int status; |
| send_rdp ("bbw-S-B", |
| RDP_STEP, 0, 1, |
| &status); |
| } |
| else |
| { |
| char handle[4]; |
| CORE_ADDR pc = read_register (ARM_PC_REGNUM); |
| pc = arm_get_next_pc (pc); |
| remote_rdp_insert_breakpoint (pc, handle); |
| rdp_execute (); |
| remote_rdp_remove_breakpoint (pc, handle); |
| } |
| } |
| |
| static void |
| remote_rdp_open (char *args, int from_tty) |
| { |
| int not_icebreaker; |
| |
| if (!args) |
| error_no_arg ("serial port device name"); |
| |
| baud_rate = 9600; |
| |
| target_preopen (from_tty); |
| |
| io = serial_open (args); |
| |
| if (!io) |
| perror_with_name (args); |
| |
| serial_raw (io); |
| |
| rdp_init (1, from_tty); |
| |
| |
| if (from_tty) |
| { |
| printf_unfiltered ("Remote RDP debugging using %s at %d baud\n", args, baud_rate); |
| } |
| |
| rdp_info (); |
| |
| /* Need to set up the vector interception state */ |
| rdp_catch_vectors (); |
| |
| /* |
| ** If it's an EmbeddedICE, we need to set the processor config. |
| ** Assume we can always have ARM7TDI... |
| */ |
| send_rdp ("bw-SB", RDP_INFO, RDP_INFO_ICEBREAKER, ¬_icebreaker); |
| if (!not_icebreaker) |
| { |
| const char *CPU = "ARM7TDI"; |
| int ICEversion; |
| int len = strlen (CPU); |
| |
| send_rdp ("bbbbw-p-SWZ", |
| RDP_SELECT_CONFIG, |
| RDI_ConfigCPU, /* Aspect: set the CPU */ |
| len, /* The number of bytes in the name */ |
| RDI_MatchAny, /* We'll take whatever we get */ |
| 0, /* We'll take whatever version's there */ |
| CPU, len, |
| &ICEversion); |
| } |
| |
| /* command line initialised on 'run' */ |
| |
| push_target (&remote_rdp_ops); |
| |
| callback->init (callback); |
| flush_cached_frames (); |
| registers_changed (); |
| stop_pc = read_pc (); |
| print_stack_frame (get_selected_frame (), -1, 1); |
| } |
| |
| |
| |
| /* Close out all files and local state before this target loses control. */ |
| |
| static void |
| remote_rdp_close (int quitting) |
| { |
| callback->shutdown (callback); |
| if (io) |
| serial_close (io); |
| io = 0; |
| } |
| |
| |
| /* Resume execution of the target process. STEP says whether to single-step |
| or to run free; SIGGNAL is the signal value (e.g. SIGINT) to be given |
| to the target, or zero for no signal. */ |
| |
| static void |
| remote_rdp_resume (ptid_t ptid, int step, enum target_signal siggnal) |
| { |
| if (step) |
| rdp_step (); |
| else |
| rdp_execute (); |
| } |
| |
| /* Wait for inferior process to do something. Return pid of child, |
| or -1 in case of error; store status through argument pointer STATUS, |
| just as `wait' would. */ |
| |
| static ptid_t |
| remote_rdp_wait (ptid_t ptid, struct target_waitstatus *status) |
| { |
| switch (ds.rdi_stopped_status) |
| { |
| default: |
| case RDP_RES_RESET: |
| case RDP_RES_SWI: |
| status->kind = TARGET_WAITKIND_EXITED; |
| status->value.integer = read_register (0); |
| break; |
| case RDP_RES_AT_BREAKPOINT: |
| status->kind = TARGET_WAITKIND_STOPPED; |
| /* The signal in sigrc is a host signal. That probably |
| should be fixed. */ |
| status->value.sig = TARGET_SIGNAL_TRAP; |
| break; |
| #if 0 |
| case rdp_signalled: |
| status->kind = TARGET_WAITKIND_SIGNALLED; |
| /* The signal in sigrc is a host signal. That probably |
| should be fixed. */ |
| status->value.sig = target_signal_from_host (sigrc); |
| break; |
| #endif |
| } |
| |
| return inferior_ptid; |
| } |
| |
| /* Get ready to modify the registers array. On machines which store |
| individual registers, this doesn't need to do anything. On machines |
| which store all the registers in one fell swoop, this makes sure |
| that registers contains all the registers from the program being |
| debugged. */ |
| |
| static void |
| remote_rdp_prepare_to_store (void) |
| { |
| /* Do nothing, since we can store individual regs */ |
| } |
| |
| /* Transfer LEN bytes between GDB address MYADDR and target address |
| MEMADDR. If WRITE is non-zero, transfer them to the target, |
| otherwise transfer them from the target. TARGET is unused. |
| |
| Returns the number of bytes transferred. */ |
| |
| static int |
| remote_rdp_xfer_inferior_memory (CORE_ADDR memaddr, char *myaddr, int len, |
| int write, struct mem_attrib *attrib, |
| struct target_ops *target) |
| { |
| /* I infer from D Taylor's code that there's a limit on the amount |
| we can transfer in one chunk.. */ |
| int done = 0; |
| while (done < len) |
| { |
| int justdone; |
| int thisbite = len - done; |
| if (thisbite > RDP_MOUTHFULL) |
| thisbite = RDP_MOUTHFULL; |
| |
| QUIT; |
| |
| if (write) |
| { |
| justdone = rdp_write (memaddr + done, myaddr + done, thisbite); |
| } |
| else |
| { |
| justdone = rdp_read (memaddr + done, myaddr + done, thisbite); |
| } |
| |
| done += justdone; |
| |
| if (justdone != thisbite) |
| break; |
| } |
| return done; |
| } |
| |
| |
| |
| struct yn |
| { |
| const char *name; |
| int bit; |
| }; |
| static struct yn stepinfo[] = |
| { |
| {"Step more than one instruction", RDP_INFO_ABOUT_STEP_GT_1}, |
| {"Step to jump", RDP_INFO_ABOUT_STEP_TO_JMP}, |
| {"Step one instruction", RDP_INFO_ABOUT_STEP_1}, |
| {0} |
| }; |
| |
| static struct yn breakinfo[] = |
| { |
| {"comparison breakpoints supported", RDP_INFO_ABOUT_BREAK_COMP}, |
| {"range breakpoints supported", RDP_INFO_ABOUT_BREAK_RANGE}, |
| {"watchpoints for byte reads supported", RDP_INFO_ABOUT_BREAK_BYTE_READ}, |
| {"watchpoints for half-word reads supported", RDP_INFO_ABOUT_BREAK_HALFWORD_READ}, |
| {"watchpoints for word reads supported", RDP_INFO_ABOUT_BREAK_WORD_READ}, |
| {"watchpoints for byte writes supported", RDP_INFO_ABOUT_BREAK_BYTE_WRITE}, |
| {"watchpoints for half-word writes supported", RDP_INFO_ABOUT_BREAK_HALFWORD_WRITE}, |
| {"watchpoints for word writes supported", RDP_INFO_ABOUT_BREAK_WORD_WRITE}, |
| {"mask break/watch-points supported", RDP_INFO_ABOUT_BREAK_MASK}, |
| {"thread-specific breakpoints supported", RDP_INFO_ABOUT_BREAK_THREAD_BREAK}, |
| {"thread-specific watchpoints supported", RDP_INFO_ABOUT_BREAK_THREAD_WATCH}, |
| {"conditional breakpoints supported", RDP_INFO_ABOUT_BREAK_COND}, |
| {0} |
| }; |
| |
| |
| static void |
| dump_bits (struct yn *t, int info) |
| { |
| while (t->name) |
| { |
| printf_unfiltered (" %-45s : %s\n", t->name, (info & t->bit) ? "Yes" : "No"); |
| t++; |
| } |
| } |
| |
| static void |
| remote_rdp_files_info (struct target_ops *target) |
| { |
| printf_filtered ("Target capabilities:\n"); |
| dump_bits (stepinfo, ds.step_info); |
| dump_bits (breakinfo, ds.break_info); |
| printf_unfiltered ("target level RDI %x\n", (ds.target_info >> 5) & 3); |
| } |
| |
| |
| static void |
| remote_rdp_create_inferior (char *exec_file, char *allargs, char **env) |
| { |
| CORE_ADDR entry_point; |
| |
| if (exec_file == 0 || exec_bfd == 0) |
| error ("No executable file specified."); |
| |
| entry_point = (CORE_ADDR) bfd_get_start_address (exec_bfd); |
| |
| remote_rdp_kill (); |
| remove_breakpoints (); |
| init_wait_for_inferior (); |
| |
| /* This gives us a chance to set up the command line */ |
| rdp_set_command_line (exec_file, allargs); |
| |
| inferior_ptid = pid_to_ptid (42); |
| insert_breakpoints (); /* Needed to get correct instruction in cache */ |
| |
| /* |
| ** RDP targets don't provide any facility to set the top of memory, |
| ** so we don't bother to look for MEMSIZE in the environment. |
| */ |
| |
| /* Let's go! */ |
| proceed (entry_point, TARGET_SIGNAL_DEFAULT, 0); |
| } |
| |
| /* Attach doesn't need to do anything */ |
| static void |
| remote_rdp_attach (char *args, int from_tty) |
| { |
| return; |
| } |
| |
| /* Define the target subroutine names */ |
| |
| struct target_ops remote_rdp_ops; |
| |
| static void |
| init_remote_rdp_ops (void) |
| { |
| remote_rdp_ops.to_shortname = "rdp"; |
| remote_rdp_ops.to_longname = "Remote Target using the RDProtocol"; |
| remote_rdp_ops.to_doc = "Use a remote ARM system which uses the ARM Remote Debugging Protocol"; |
| remote_rdp_ops.to_open = remote_rdp_open; |
| remote_rdp_ops.to_close = remote_rdp_close; |
| remote_rdp_ops.to_attach = remote_rdp_attach; |
| remote_rdp_ops.to_resume = remote_rdp_resume; |
| remote_rdp_ops.to_wait = remote_rdp_wait; |
| remote_rdp_ops.to_fetch_registers = remote_rdp_fetch_register; |
| remote_rdp_ops.to_store_registers = remote_rdp_store_register; |
| remote_rdp_ops.to_prepare_to_store = remote_rdp_prepare_to_store; |
| remote_rdp_ops.to_xfer_memory = remote_rdp_xfer_inferior_memory; |
| remote_rdp_ops.to_files_info = remote_rdp_files_info; |
| remote_rdp_ops.to_insert_breakpoint = remote_rdp_insert_breakpoint; |
| remote_rdp_ops.to_remove_breakpoint = remote_rdp_remove_breakpoint; |
| remote_rdp_ops.to_kill = remote_rdp_kill; |
| remote_rdp_ops.to_load = generic_load; |
| remote_rdp_ops.to_create_inferior = remote_rdp_create_inferior; |
| remote_rdp_ops.to_mourn_inferior = generic_mourn_inferior; |
| remote_rdp_ops.to_stratum = process_stratum; |
| remote_rdp_ops.to_has_all_memory = 1; |
| remote_rdp_ops.to_has_memory = 1; |
| remote_rdp_ops.to_has_stack = 1; |
| remote_rdp_ops.to_has_registers = 1; |
| remote_rdp_ops.to_has_execution = 1; |
| remote_rdp_ops.to_magic = OPS_MAGIC; |
| } |
| |
| extern initialize_file_ftype _initialize_remote_rdp; /* -Wmissing-prototypes */ |
| |
| void |
| _initialize_remote_rdp (void) |
| { |
| init_remote_rdp_ops (); |
| add_target (&remote_rdp_ops); |
| } |