From bbd2783ec0022b28f822573e81cd019a91a3b981 Mon Sep 17 00:00:00 2001 From: Kevin Buettner Date: Mon, 8 Mar 2010 19:06:34 +0000 Subject: [PATCH] * remote-mips.c (rockhopper_ops): New target_ops struct. (MON_ROCKHOPPER): New mips_monitor_type. (read_hex_value): New function. (mips_request): Send 8-byte values with a 'T' packet. Read the packet argument as a string and use read_hex_value to parse it. (mips_exit_debug): Wait for response when using MON_ROCKHOPPER. (rockhopper_open): New function. (mips_wait): Read the PC, FP and SP fields as strings. Use read_hex_value to parse them and mips_set_register to commit them. (mips_set_register): New function. (mips_fetch_registers): Do not cast register value to "unsigned" when reading a MON_ROCKHOPPER 't' packet. Use mips_set_register. (mips_store_registers): Use a 'T' packet to set registers when using MON_ROCKHOPPER. (pmon_end_download): Don't run initEther if using MON_ROCKHOPPER and expect the total to be printed before the entry address. (_initialize_remote_mips): Initialize and add rockhopper_ops. --- gdb/ChangeLog | 23 +++++++ gdb/remote-mips.c | 170 ++++++++++++++++++++++++++++++++-------------- 2 files changed, 141 insertions(+), 52 deletions(-) diff --git a/gdb/ChangeLog b/gdb/ChangeLog index fea4e785c34..0d1b38d1fae 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,26 @@ +2010-03-08 Kevin Buettner + + From Richard Sandiford, Martin M. Hunt, Corinna Vinschen, + and Kevin Buettner: + + * remote-mips.c (rockhopper_ops): New target_ops struct. + (MON_ROCKHOPPER): New mips_monitor_type. + (read_hex_value): New function. + (mips_request): Send 8-byte values with a 'T' packet. Read the + packet argument as a string and use read_hex_value to parse it. + (mips_exit_debug): Wait for response when using MON_ROCKHOPPER. + (rockhopper_open): New function. + (mips_wait): Read the PC, FP and SP fields as strings. Use + read_hex_value to parse them and mips_set_register to commit them. + (mips_set_register): New function. + (mips_fetch_registers): Do not cast register value to "unsigned" + when reading a MON_ROCKHOPPER 't' packet. Use mips_set_register. + (mips_store_registers): Use a 'T' packet to set registers when + using MON_ROCKHOPPER. + (pmon_end_download): Don't run initEther if using MON_ROCKHOPPER + and expect the total to be printed before the entry address. + (_initialize_remote_mips): Initialize and add rockhopper_ops. + 2010-03-08 Kevin Buettner * remote-mips.c (mips_fetch_word): Add new parameter, `valp'. diff --git a/gdb/remote-mips.c b/gdb/remote-mips.c index fbd0c126240..b763175bbb6 100644 --- a/gdb/remote-mips.c +++ b/gdb/remote-mips.c @@ -89,6 +89,8 @@ static void mips_detach (struct target_ops *ops, char *args, int from_tty); static int mips_map_regno (struct gdbarch *, int); +static void mips_set_register (int regno, ULONGEST value); + static void mips_prepare_to_store (struct regcache *regcache); static int mips_fetch_word (CORE_ADDR addr, unsigned int *valp); @@ -143,6 +145,7 @@ static int mips_common_breakpoint (int set, CORE_ADDR addr, int len, extern struct target_ops mips_ops; extern struct target_ops pmon_ops; extern struct target_ops ddb_ops; +extern struct target_ops rockhopper_ops; /* *INDENT-OFF* */ /* The MIPS remote debugging interface is built on top of a simple packet protocol. Each packet is organized as follows: @@ -288,7 +291,7 @@ extern struct target_ops ddb_ops; These are initialized with code in _initialize_remote_mips instead of static initializers, to make it easier to extend the target_ops vector later. */ -struct target_ops mips_ops, pmon_ops, ddb_ops, lsi_ops; +struct target_ops mips_ops, pmon_ops, ddb_ops, rockhopper_ops, lsi_ops; enum mips_monitor_type { @@ -298,6 +301,7 @@ enum mips_monitor_type MON_PMON, /* 3.0.83 [COGENT,EB,FP,NET] Algorithmics Ltd. Nov 9 1995 17:19:50 */ MON_DDB, /* 2.7.473 [DDBVR4300,EL,FP,NET] Risq Modular Systems, Thu Jun 6 09:28:40 PDT 1996 */ MON_LSI, /* 4.3.12 [EB,FP], LSI LOGIC Corp. Tue Feb 25 13:22:14 1997 */ + MON_ROCKHOPPER, /* Last and unused value, for sizing vectors, etc. */ MON_LAST }; @@ -527,6 +531,33 @@ fputs_readable (const char *string, struct ui_file *file) } +/* Read P as a hex value. Return true if every character made sense, + storing the result in *RESULT. Leave *RESULT unchanged otherwise. */ + +static int +read_hex_value (const char *p, ULONGEST *result) +{ + ULONGEST retval; + + retval = 0; + while (*p != 0) + { + retval <<= 4; + if (*p >= '0' && *p <= '9') + retval |= *p - '0'; + else if (*p >= 'A' && *p <= 'F') + retval |= *p - 'A' + 10; + else if (*p >= 'a' && *p <= 'f') + retval |= *p - 'a' + 10; + else + return 0; + p++; + } + *result = retval; + return 1; +} + + /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if timed out. TIMEOUT specifies timeout value in seconds. */ @@ -1196,11 +1227,12 @@ mips_request (int cmd, { int addr_size = gdbarch_addr_bit (target_gdbarch) / 8; char myBuff[DATA_MAXLEN + 1]; + char response_string[17]; int len; int rpid; char rcmd; int rerrflg; - unsigned long rresponse; + ULONGEST rresponse; if (buff == (char *) NULL) buff = myBuff; @@ -1210,8 +1242,15 @@ mips_request (int cmd, if (mips_need_reply) internal_error (__FILE__, __LINE__, _("mips_request: Trying to send command before reply")); - sprintf (buff, "0x0 %c 0x%s 0x%s", cmd, - phex_nz (addr, addr_size), phex_nz (data, addr_size)); + /* 'T' sets a register to a 64-bit value, so make sure we use + the right conversion function. */ + if (cmd == 'T') + sprintf (buff, "0x0 %c 0x%s 0x%s", cmd, + phex_nz (addr, addr_size), phex_nz (data, 8)); + else + sprintf (buff, "0x0 %c 0x%s 0x%s", cmd, + phex_nz (addr, addr_size), phex_nz (data, addr_size)); + mips_send_packet (buff, 1); mips_need_reply = 1; } @@ -1228,8 +1267,9 @@ mips_request (int cmd, len = mips_receive_packet (buff, 1, timeout); buff[len] = '\0'; - if (sscanf (buff, "0x%x %c 0x%x 0x%lx", - &rpid, &rcmd, &rerrflg, &rresponse) != 4 + if (sscanf (buff, "0x%x %c 0x%x 0x%16s", + &rpid, &rcmd, &rerrflg, response_string) != 4 + || !read_hex_value (response_string, &rresponse) || (cmd != '\0' && rcmd != cmd)) mips_error ("Bad response from remote board"); @@ -1311,7 +1351,7 @@ mips_exit_debug (void) mips_exiting = 1; - if (mips_monitor != MON_IDT) + if (mips_monitor != MON_IDT && mips_monitor != MON_ROCKHOPPER) { /* The DDB (NEC) and MiniRISC (LSI) versions of PMON exit immediately, so we do not get a reply to this command: */ @@ -1624,6 +1664,14 @@ ddb_open (char *name, int from_tty) common_open (&ddb_ops, name, from_tty, MON_DDB, "NEC010>"); } +/* Open a connection to a rockhopper board. */ + +static void +rockhopper_open (char *name, int from_tty) +{ + common_open (&rockhopper_ops, name, from_tty, MON_ROCKHOPPER, "NEC01>"); +} + static void lsi_open (char *name, int from_tty) { @@ -1704,6 +1752,34 @@ mips_signal_from_protocol (int sig) return (enum target_signal) sig; } +/* Set the register designated by REGNO to the value designated by VALUE. */ + +static void +mips_set_register (int regno, ULONGEST value) +{ + char buf[MAX_REGISTER_SIZE]; + struct regcache *regcache = get_current_regcache (); + struct gdbarch *gdbarch = get_regcache_arch (regcache); + enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); + + /* We got the number the register holds, but gdb expects to see a + value in the target byte ordering. */ + + if (mips_monitor != MON_ROCKHOPPER + && (regno == mips_regnum (gdbarch)->pc || regno < 32)) + /* Some 64-bit boards have monitors that only send the bottom 32 bits. + In such cases we can only really debug 32-bit code properly so, + when reading a GPR or the PC, assume that the full 64-bit + value is the sign extension of the lower 32 bits. */ + store_signed_integer (buf, register_size (gdbarch, regno), byte_order, + value); + else + store_unsigned_integer (buf, register_size (gdbarch, regno), byte_order, + value); + + regcache_raw_supply (regcache, regno, buf); +} + /* Wait until the remote stops, and return a wait status. */ static ptid_t @@ -1713,8 +1789,8 @@ mips_wait (struct target_ops *ops, int rstatus; int err; char buff[DATA_MAXLEN]; - int rpc, rfp, rsp; - char flags[20]; + ULONGEST rpc, rfp, rsp; + char pc_string[17], fp_string[17], sp_string[17], flags[20]; int nfields; int i; @@ -1754,35 +1830,19 @@ mips_wait (struct target_ops *ops, /* See if we got back extended status. If so, pick out the pc, fp, sp, etc... */ - nfields = sscanf (buff, "0x%*x %*c 0x%*x 0x%*x 0x%x 0x%x 0x%x 0x%*x %s", - &rpc, &rfp, &rsp, flags); - if (nfields >= 3) + nfields = sscanf (buff, "0x%*x %*c 0x%*x 0x%*x 0x%16s 0x%16s 0x%16s 0x%*x %s", + pc_string, fp_string, sp_string, flags); + if (nfields >= 3 + && read_hex_value (pc_string, &rpc) + && read_hex_value (fp_string, &rfp) + && read_hex_value (sp_string, &rsp)) { struct regcache *regcache = get_current_regcache (); struct gdbarch *gdbarch = get_regcache_arch (regcache); - enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); - char buf[MAX_REGISTER_SIZE]; - - store_unsigned_integer - (buf, register_size (gdbarch, gdbarch_pc_regnum (gdbarch)), - byte_order, rpc); - regcache_raw_supply (regcache, gdbarch_pc_regnum (gdbarch), buf); - - store_unsigned_integer - (buf, register_size (gdbarch, gdbarch_pc_regnum (gdbarch)), - byte_order, rfp); - regcache_raw_supply (regcache, 30, buf); /* This register they are avoiding and so it is unnamed */ - - store_unsigned_integer - (buf, register_size (gdbarch, gdbarch_sp_regnum (gdbarch)), - byte_order, rsp); - regcache_raw_supply (regcache, gdbarch_sp_regnum (gdbarch), buf); - - store_unsigned_integer - (buf, register_size (gdbarch, gdbarch_deprecated_fp_regnum (gdbarch)), - byte_order, 0); - regcache_raw_supply (regcache, - gdbarch_deprecated_fp_regnum (gdbarch), buf); + + mips_set_register (gdbarch_pc_regnum (gdbarch), rpc); + mips_set_register (30, rfp); + mips_set_register (gdbarch_sp_regnum (gdbarch), rsp); if (nfields == 9) { @@ -1912,7 +1972,7 @@ mips_fetch_registers (struct target_ops *ops, { struct gdbarch *gdbarch = get_regcache_arch (regcache); enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); - unsigned LONGEST val; + ULONGEST val; int err; if (regno == -1) @@ -1939,9 +1999,9 @@ mips_fetch_registers (struct target_ops *ops, /* Unfortunately the PMON version in the Vr4300 board has been compiled without the 64bit register access commands. This means we cannot get hold of the full register width. */ - if (mips_monitor == MON_DDB) - val = (unsigned) mips_request ('t', pmon_reg, 0, - &err, mips_receive_wait, NULL); + if (mips_monitor == MON_DDB || mips_monitor == MON_ROCKHOPPER) + val = mips_request ('t', pmon_reg, 0, + &err, mips_receive_wait, NULL); else val = mips_request ('r', pmon_reg, 0, &err, mips_receive_wait, NULL); @@ -1951,15 +2011,7 @@ mips_fetch_registers (struct target_ops *ops, } } - { - char buf[MAX_REGISTER_SIZE]; - - /* We got the number the register holds, but gdb expects to see a - value in the target byte ordering. */ - store_unsigned_integer (buf, register_size (gdbarch, regno), - byte_order, val); - regcache_raw_supply (regcache, regno, buf); - } + mips_set_register (regno, val); } /* Prepare to store registers. The MIPS protocol can store individual @@ -1988,7 +2040,9 @@ mips_store_registers (struct target_ops *ops, } regcache_cooked_read_unsigned (regcache, regno, &val); - mips_request ('R', mips_map_regno (gdbarch, regno), val, + mips_request (mips_monitor == MON_ROCKHOPPER ? 'T' : 'R', + mips_map_regno (gdbarch, regno), + val, &err, mips_receive_wait, NULL); if (err) mips_error ("Can't write register %d: %s", regno, safe_strerror (errno)); @@ -2373,7 +2427,7 @@ static int mips_check_lsi_error (CORE_ADDR addr, int rerrflg) { struct lsi_error *err; - char *saddr = paddress (target_gdbarch, addr); + const char *saddr = paddress (target_gdbarch, addr); if (rerrflg == 0) /* no error */ return 0; @@ -3090,7 +3144,8 @@ pmon_end_download (int final, int bintotal) chmod (tftp_localname, stbuf.st_mode | S_IROTH); /* Must reinitialize the board to prevent PMON from crashing. */ - mips_send_command ("initEther\r", -1); + if (mips_monitor != MON_ROCKHOPPER) + mips_send_command ("initEther\r", -1); /* Send the load command. */ cmd = xmalloc (strlen (load_cmd_prefix) + strlen (tftp_name) + 2); @@ -3118,6 +3173,11 @@ pmon_end_download (int final, int bintotal) if (!pmon_check_total (bintotal)) return; break; + case MON_ROCKHOPPER: + if (!pmon_check_total (bintotal)) + return; + pmon_check_entry_address ("Entry Address = ", final); + break; default: pmon_check_entry_address ("Entry Address = ", final); pmon_check_ack ("termination"); @@ -3405,7 +3465,7 @@ _initialize_remote_mips (void) mips_ops.to_magic = OPS_MAGIC; /* Copy the common fields to all four target vectors. */ - pmon_ops = ddb_ops = lsi_ops = mips_ops; + rockhopper_ops = pmon_ops = ddb_ops = lsi_ops = mips_ops; /* Initialize target-specific fields in the target vectors. */ mips_ops.to_shortname = "mips"; @@ -3435,6 +3495,11 @@ of the TFTP temporary file, if it differs from the filename seen by the board."; ddb_ops.to_open = ddb_open; ddb_ops.to_wait = mips_wait; + rockhopper_ops.to_shortname = "rockhopper"; + rockhopper_ops.to_doc = ddb_ops.to_doc; + rockhopper_ops.to_open = rockhopper_open; + rockhopper_ops.to_wait = mips_wait; + lsi_ops.to_shortname = "lsi"; lsi_ops.to_doc = pmon_ops.to_doc; lsi_ops.to_open = lsi_open; @@ -3445,6 +3510,7 @@ of the TFTP temporary file, if it differs from the filename seen by the board."; add_target (&pmon_ops); add_target (&ddb_ops); add_target (&lsi_ops); + add_target (&rockhopper_ops); add_setshow_zinteger_cmd ("timeout", no_class, &mips_receive_wait, _("\ Set timeout in seconds for remote MIPS serial I/O."), _("\ -- 2.30.2