/* Native-dependent Motorola 88xxx support for GDB, the GNU Debugger. Copyright 1988, 1990, 1991, 1992 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. */ #include "defs.h" #include "frame.h" #include "inferior.h" #include <sys/types.h> #include <sys/param.h> #include <sys/dir.h> #include <signal.h> #include "gdbcore.h" #include <sys/user.h> #ifndef USER /* added to support BCS ptrace_user */ #define USER ptrace_user #endif #include <sys/ioctl.h> #include <fcntl.h> #include <sys/file.h> #include "gdb_stat.h" #include "symtab.h" #include "setjmp.h" #include "value.h" #ifdef DELTA88 #include <sys/ptrace.h> /* define offsets to the pc instruction offsets in ptrace_user struct */ #define SXIP_OFFSET ((char *)&u.pt_sigframe.sig_sxip - (char *)&u) #define SNIP_OFFSET ((char *)&u.pt_sigframe.sig_snip - (char *)&u) #define SFIP_OFFSET ((char *)&u.pt_sigframe.sig_sfip - (char *)&u) #else /* define offsets to the pc instruction offsets in ptrace_user struct */ #define SXIP_OFFSET ((char *)&u.pt_sigframe.dg_sigframe.sc_sxip - (char *)&u) #define SNIP_OFFSET ((char *)&u.pt_sigframe.dg_sigframe.sc_snip - (char *)&u) #define SFIP_OFFSET ((char *)&u.pt_sigframe.dg_sigframe.sc_sfip - (char *)&u) #endif extern int have_symbol_file_p(); extern jmp_buf stack_jmp; extern int errno; extern char registers[REGISTER_BYTES]; void fetch_inferior_registers (regno) int regno; /* Original value discarded */ { register unsigned int regaddr; char buf[MAX_REGISTER_RAW_SIZE]; register int i; struct USER u; unsigned int offset; offset = (char *) &u.pt_r0 - (char *) &u; regaddr = offset; /* byte offset to r0;*/ /* offset = ptrace (3, inferior_pid, (PTRACE_ARG3_TYPE) offset, 0) - KERNEL_U_ADDR; */ for (regno = 0; regno < NUM_REGS; regno++) { /*regaddr = register_addr (regno, offset);*/ /* 88k enhancement */ for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int)) { *(int *) &buf[i] = ptrace (3, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, 0); regaddr += sizeof (int); } supply_register (regno, buf); } /* now load up registers 36 - 38; special pc registers */ *(int *) &buf[0] = ptrace (3,inferior_pid, (PTRACE_ARG3_TYPE) SXIP_OFFSET ,0); supply_register (SXIP_REGNUM, buf); *(int *) &buf[0] = ptrace (3, inferior_pid, (PTRACE_ARG3_TYPE) SNIP_OFFSET,0); supply_register (SNIP_REGNUM, buf); *(int *) &buf[0] = ptrace (3, inferior_pid, (PTRACE_ARG3_TYPE) SFIP_OFFSET,0); supply_register (SFIP_REGNUM, buf); } /* Store our register values back into the inferior. If REGNO is -1, do this for all registers. Otherwise, REGNO specifies which register (so we can save time). */ void store_inferior_registers (regno) int regno; { register unsigned int regaddr; char buf[80]; struct USER u; unsigned int offset = (char *) &u.pt_r0 - (char *) &u; regaddr = offset; /* Don't try to deal with EXIP_REGNUM or ENIP_REGNUM, because I think either svr3 doesn't run on an 88110, or the kernel isolates the different (not completely sure this is true, but seems to be. */ if (regno >= 0) { /* regaddr = register_addr (regno, offset); */ if (regno < PC_REGNUM) { regaddr = offset + regno * sizeof (int); errno = 0; ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, read_register (regno)); if (errno != 0) { sprintf (buf, "writing register number %d", regno); perror_with_name (buf); } } else if (regno == SXIP_REGNUM) ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) SXIP_OFFSET, read_register(regno)); else if (regno == SNIP_REGNUM) ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) SNIP_OFFSET, read_register(regno)); else if (regno == SFIP_REGNUM) ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) SFIP_OFFSET, read_register(regno)); else printf_unfiltered ("Bad register number for store_inferior routine\n"); } else { for (regno = 0; regno < PC_REGNUM; regno++) { /* regaddr = register_addr (regno, offset); */ errno = 0; regaddr = offset + regno * sizeof (int); ptrace (6, inferior_pid, (PTRACE_ARG3_TYPE) regaddr, read_register (regno)); if (errno != 0) { sprintf (buf, "writing register number %d", regno); perror_with_name (buf); } } ptrace (6,inferior_pid, (PTRACE_ARG3_TYPE) SXIP_OFFSET,read_register(SXIP_REGNUM)); ptrace (6,inferior_pid, (PTRACE_ARG3_TYPE) SNIP_OFFSET,read_register(SNIP_REGNUM)); ptrace (6,inferior_pid, (PTRACE_ARG3_TYPE) SFIP_OFFSET,read_register(SFIP_REGNUM)); } } /* blockend is the address of the end of the user structure */ m88k_register_u_addr (blockend, regnum) { struct USER u; int ustart = blockend - sizeof (struct USER); switch (regnum) { case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7: case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15: case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23: case 24: case 25: case 26: case 27: case 28: case 29: case 30: case 31: return (ustart + ((int) &u.pt_r0 - (int) &u) + REGISTER_SIZE * regnum); case PSR_REGNUM: return (ustart + ((int) &u.pt_psr - (int) &u)); case FPSR_REGNUM: return (ustart + ((int) &u.pt_fpsr - (int) &u)); case FPCR_REGNUM: return (ustart + ((int) &u.pt_fpcr - (int) &u)); case SXIP_REGNUM: return (ustart + SXIP_OFFSET); case SNIP_REGNUM: return (ustart + SNIP_OFFSET); case SFIP_REGNUM: return (ustart + SFIP_OFFSET); default: if (regnum < NUM_REGS) /* The register is one of those which is not defined... give it zero */ return (ustart + ((int) &u.pt_r0 - (int) &u)); else return (blockend + REGISTER_SIZE * regnum); } } #ifdef USE_PROC_FS #include <sys/procfs.h> /* Given a pointer to a general register set in /proc format (gregset_t *), unpack the register contents and supply them as gdb's idea of the current register values. */ void supply_gregset (gregsetp) gregset_t *gregsetp; { register int regi; register greg_t *regp = (greg_t *) gregsetp; for (regi=0; regi <= SP_REGNUM; regi++) supply_register (regi, (char *) (regp + regi)); supply_register (SXIP_REGNUM, (char *) (regp + R_XIP)); supply_register (SNIP_REGNUM, (char *) (regp + R_NIP)); supply_register (SFIP_REGNUM, (char *) (regp + R_FIP)); supply_register (PSR_REGNUM, (char *) (regp + R_PSR)); supply_register (FPSR_REGNUM, (char *) (regp + R_FPSR)); supply_register (FPCR_REGNUM, (char *) (regp + R_FPCR)); } void fill_gregset (gregsetp, regno) gregset_t *gregsetp; int regno; { int regi; register greg_t *regp = (greg_t *) gregsetp; extern char registers[]; for (regi = 0 ; regi <= R_R31 ; regi++) if ((regno == -1) || (regno == regi)) *(regp + regi) = *(int *) ®isters[REGISTER_BYTE(regi)]; if ((regno == -1) || (regno == SXIP_REGNUM)) *(regp + R_XIP) = *(int *) ®isters[REGISTER_BYTE(SXIP_REGNUM)]; if ((regno == -1) || (regno == SNIP_REGNUM)) *(regp + R_NIP) = *(int *) ®isters[REGISTER_BYTE(SNIP_REGNUM)]; if ((regno == -1) || (regno == SFIP_REGNUM)) *(regp + R_FIP) = *(int *) ®isters[REGISTER_BYTE(SFIP_REGNUM)]; if ((regno == -1) || (regno == PSR_REGNUM)) *(regp + R_PSR) = *(int *) ®isters[REGISTER_BYTE(PSR_REGNUM)]; if ((regno == -1) || (regno == FPSR_REGNUM)) *(regp + R_FPSR) = *(int *) ®isters[REGISTER_BYTE(FPSR_REGNUM)]; if ((regno == -1) || (regno == FPCR_REGNUM)) *(regp + R_FPCR) = *(int *) ®isters[REGISTER_BYTE(FPCR_REGNUM)]; } #endif /* USE_PROC_FS */