| /* 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; |
| |
| 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; |
| |
| 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 */ |