| /* Motorola m68k native support for Linux |
| Copyright (C) 1996,1998 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 "language.h" |
| #include "gdbcore.h" |
| |
| #ifdef USG |
| #include <sys/types.h> |
| #endif |
| |
| #include <sys/param.h> |
| #include <sys/dir.h> |
| #include <signal.h> |
| #include <sys/user.h> |
| #include <sys/ioctl.h> |
| #include <fcntl.h> |
| #include <sys/procfs.h> |
| |
| #include <sys/file.h> |
| #include "gdb_stat.h" |
| |
| #include "floatformat.h" |
| |
| #include "target.h" |
| |
| |
| /* This table must line up with REGISTER_NAMES in tm-m68k.h */ |
| static const int regmap[] = |
| { |
| PT_D0, PT_D1, PT_D2, PT_D3, PT_D4, PT_D5, PT_D6, PT_D7, |
| PT_A0, PT_A1, PT_A2, PT_A3, PT_A4, PT_A5, PT_A6, PT_USP, |
| PT_SR, PT_PC, |
| /* PT_FP0, ..., PT_FP7 */ |
| 21, 24, 27, 30, 33, 36, 39, 42, |
| /* PT_FPCR, PT_FPSR, PT_FPIAR */ |
| 45, 46, 47 |
| }; |
| |
| /* BLOCKEND is the value of u.u_ar0, and points to the place where GS |
| is stored. */ |
| |
| int |
| m68k_linux_register_u_addr (blockend, regnum) |
| int blockend; |
| int regnum; |
| { |
| return (blockend + 4 * regmap[regnum]); |
| } |
| |
| /* 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. */ |
| |
| |
| /* Note both m68k-tdep.c and m68klinux-nat.c contain definitions |
| for supply_gregset and supply_fpregset. The definitions |
| in m68k-tdep.c are valid if USE_PROC_FS is defined. Otherwise, |
| the definitions in m68klinux-nat.c will be used. This is a |
| bit of a hack. The supply_* routines do not belong in |
| *_tdep.c files. But, there are several lynx ports that currently |
| depend on these definitions. */ |
| |
| #ifndef USE_PROC_FS |
| |
| void |
| supply_gregset (gregsetp) |
| gregset_t *gregsetp; |
| { |
| int regi; |
| |
| for (regi = D0_REGNUM ; regi <= SP_REGNUM ; regi++) |
| supply_register (regi, (char *) (*gregsetp + regmap[regi])); |
| supply_register (PS_REGNUM, (char *) (*gregsetp + PT_SR)); |
| supply_register (PC_REGNUM, (char *) (*gregsetp + PT_PC)); |
| } |
| |
| /* Given a pointer to a floating point register set in /proc format |
| (fpregset_t *), unpack the register contents and supply them as gdb's |
| idea of the current floating point register values. */ |
| |
| void |
| supply_fpregset (fpregsetp) |
| fpregset_t *fpregsetp; |
| { |
| int regi; |
| |
| for (regi = FP0_REGNUM ; regi < FPC_REGNUM ; regi++) |
| supply_register (regi, (char *) &fpregsetp->fpregs[(regi - FP0_REGNUM) * 3]); |
| supply_register (FPC_REGNUM, (char *) &fpregsetp->fpcntl[0]); |
| supply_register (FPS_REGNUM, (char *) &fpregsetp->fpcntl[1]); |
| supply_register (FPI_REGNUM, (char *) &fpregsetp->fpcntl[2]); |
| } |
| |
| #endif |
| |
| |
| int |
| kernel_u_size () |
| { |
| return (sizeof (struct user)); |
| } |
| |
| /* Return non-zero if PC points into the signal trampoline. */ |
| |
| int |
| in_sigtramp (pc) |
| CORE_ADDR pc; |
| { |
| CORE_ADDR sp; |
| char buf[TARGET_SHORT_BIT / TARGET_CHAR_BIT]; |
| int insn; |
| |
| sp = read_register (SP_REGNUM); |
| if (pc - 2 < sp) |
| return 0; |
| |
| if (read_memory_nobpt (pc, buf, sizeof (buf))) |
| return 0; |
| insn = extract_unsigned_integer (buf, sizeof (buf)); |
| if (insn == 0xdefc /* addaw #,sp */ |
| || insn == 0x7077 /* moveq #119,d0 */ |
| || insn == 0x4e40 /* trap #0 */ |
| || insn == 0x203c /* movel #,d0 */) |
| return 1; |
| |
| if (read_memory_nobpt (pc - 2, buf, sizeof (buf))) |
| return 0; |
| insn = extract_unsigned_integer (buf, sizeof (buf)); |
| if (insn == 0xdefc /* addaw #,sp */ |
| || insn == 0x7077 /* moveq #119,d0 */ |
| || insn == 0x4e40 /* trap #0 */ |
| || insn == 0x203c /* movel #,d0 */) |
| return 1; |
| |
| return 0; |
| } |