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[/] [or1k/] [tags/] [start/] [insight/] [gdb/] [remote-vx29k.c] - Rev 1765
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/* Am29k-dependent portions of the RPC protocol 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 "target.h" #include "gdbcore.h" #include "command.h" #include "symtab.h" #include "symfile.h" /* for struct complaint */ #include "regcache.h" #include "gdb_string.h" #include <errno.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 (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 (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. THISFRAME is unused. */ int vx29k_frame_chain_valid (CORE_ADDR chain, struct frame_info *thisframe) { int fp_contents; read_memory ((CORE_ADDR) (chain + 4), (char *) &fp_contents, 4); return (fp_contents != 0); }