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Diffstat (limited to 'gdb/remote-vx29k.c')
| -rw-r--r-- | gdb/remote-vx29k.c | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/gdb/remote-vx29k.c b/gdb/remote-vx29k.c new file mode 100644 index 0000000..e6fc2c7 --- /dev/null +++ b/gdb/remote-vx29k.c @@ -0,0 +1,188 @@ +/* Am29k-dependent portions of the RPC protocol + used with a VxWorks target + +Contributed by Wind River Systems. + +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. */ + +#include <stdio.h> +#include "defs.h" + +#include "vx-share/regPacket.h" +#include "frame.h" +#include "inferior.h" +#include "wait.h" +#include "target.h" +#include "gdbcore.h" +#include "command.h" +#include "symtab.h" +#include "symfile.h" /* for struct complaint */ + +#include "gdb_string.h" +#include <errno.h> +#include <signal.h> +#include <fcntl.h> +#include <sys/types.h> +#include <sys/time.h> +#include <sys/socket.h> + +#ifdef _AIX /* IBM claims "void *malloc()" not char * */ +#define malloc bogon_malloc +#endif + +#include <rpc/rpc.h> +#include <sys/time.h> /* UTek's <rpc/rpc.h> doesn't #incl this */ +#include <netdb.h> +#include "vx-share/ptrace.h" +#include "vx-share/xdr_ptrace.h" +#include "vx-share/xdr_ld.h" +#include "vx-share/xdr_rdb.h" +#include "vx-share/dbgRpcLib.h" + +/* get rid of value.h if possible */ +#include <value.h> +#include <symtab.h> + +/* Flag set if target has fpu */ + +extern int target_has_fp; + +/* Generic register read/write routines in remote-vx.c. */ + +extern void net_read_registers (); +extern void net_write_registers (); + +/* Read a register or registers from the VxWorks target. + REGNO is the register to read, or -1 for all; currently, + it is ignored. FIXME look at regno to improve efficiency. */ + +void +vx_read_register (regno) + int regno; +{ + char am29k_greg_packet[AM29K_GREG_PLEN]; + char am29k_fpreg_packet[AM29K_FPREG_PLEN]; + + /* Get general-purpose registers. When copying values into + registers [], don't assume that a location in registers [] + is properly aligned for the target data type. */ + + net_read_registers (am29k_greg_packet, AM29K_GREG_PLEN, PTRACE_GETREGS); + + /* Now copy the register values into registers[]. + Note that this code depends on the ordering of the REGNUMs + as defined in "tm-29k.h". */ + + bcopy (&am29k_greg_packet[AM29K_R_GR96], + ®isters[REGISTER_BYTE (GR96_REGNUM)], 160 * AM29K_GREG_SIZE); + bcopy (&am29k_greg_packet[AM29K_R_VAB], + ®isters[REGISTER_BYTE (VAB_REGNUM)], 15 * AM29K_GREG_SIZE); + registers[REGISTER_BYTE (INTE_REGNUM)] = am29k_greg_packet[AM29K_R_INTE]; + bcopy (&am29k_greg_packet[AM29K_R_RSP], + ®isters[REGISTER_BYTE (GR1_REGNUM)], 5 * AM29K_GREG_SIZE); + + /* PAD For now, don't care about exop register */ + + memset (®isters[REGISTER_BYTE (EXO_REGNUM)], '\0', AM29K_GREG_SIZE); + + /* If the target has floating point registers, fetch them. + Otherwise, zero the floating point register values in + registers[] for good measure, even though we might not + need to. */ + + if (target_has_fp) + { + net_read_registers (am29k_fpreg_packet, AM29K_FPREG_PLEN, + PTRACE_GETFPREGS); + registers[REGISTER_BYTE (FPE_REGNUM)] = am29k_fpreg_packet[AM29K_R_FPE]; + registers[REGISTER_BYTE (FPS_REGNUM)] = am29k_fpreg_packet[AM29K_R_FPS]; + + /* PAD For now, don't care about registers (?) AI0 to q */ + + memset (®isters[REGISTER_BYTE (161)], '\0', 21 * AM29K_FPREG_SIZE); + } + else + { + memset (®isters[REGISTER_BYTE (FPE_REGNUM)], '\0', AM29K_FPREG_SIZE); + memset (®isters[REGISTER_BYTE (FPS_REGNUM)], '\0', AM29K_FPREG_SIZE); + + /* PAD For now, don't care about registers (?) AI0 to q */ + + memset (®isters[REGISTER_BYTE (161)], '\0', 21 * AM29K_FPREG_SIZE); + } + + /* Mark the register cache valid. */ + + registers_fetched (); +} + +/* Store a register or registers into the VxWorks target. + REGNO is the register to store, or -1 for all; currently, + it is ignored. FIXME look at regno to improve efficiency. */ + +void +vx_write_register (regno) + int regno; +{ + char am29k_greg_packet[AM29K_GREG_PLEN]; + char am29k_fpreg_packet[AM29K_FPREG_PLEN]; + + /* Store general purpose registers. When copying values from + registers [], don't assume that a location in registers [] + is properly aligned for the target data type. */ + + bcopy (®isters[REGISTER_BYTE (GR96_REGNUM)], + &am29k_greg_packet[AM29K_R_GR96], 160 * AM29K_GREG_SIZE); + bcopy (®isters[REGISTER_BYTE (VAB_REGNUM)], + &am29k_greg_packet[AM29K_R_VAB], 15 * AM29K_GREG_SIZE); + am29k_greg_packet[AM29K_R_INTE] = registers[REGISTER_BYTE (INTE_REGNUM)]; + bcopy (®isters[REGISTER_BYTE (GR1_REGNUM)], + &am29k_greg_packet[AM29K_R_RSP], 5 * AM29K_GREG_SIZE); + + net_write_registers (am29k_greg_packet, AM29K_GREG_PLEN, PTRACE_SETREGS); + + /* Store floating point registers if the target has them. */ + + if (target_has_fp) + { + am29k_fpreg_packet[AM29K_R_FPE] = registers[REGISTER_BYTE (FPE_REGNUM)]; + am29k_fpreg_packet[AM29K_R_FPS] = registers[REGISTER_BYTE (FPS_REGNUM)]; + + net_write_registers (am29k_fpreg_packet, AM29K_FPREG_PLEN, + PTRACE_SETFPREGS); + } +} + +/* VxWorks zeroes fp when the task is initialized; we use this + to terminate the frame chain. Chain means here the nominal address of + a frame, that is, the return address (lr0) address in the stack. To + obtain the frame pointer (lr1) contents, we must add 4 bytes. + Note : may be we should modify init_frame_info() to get the frame pointer + and store it into the frame_info struct rather than reading its + contents when FRAME_CHAIN_VALID is invoked. */ + +int +vx29k_frame_chain_valid (chain, thisframe) + CORE_ADDR chain; + struct frame_info *thisframe; /* not used here */ +{ + int fp_contents; + + read_memory ((CORE_ADDR)(chain + 4), (char *) &fp_contents, 4); + return (fp_contents != 0); +} + |