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Diffstat (limited to 'gdb/tm-news.h')
| -rw-r--r-- | gdb/tm-news.h | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/gdb/tm-news.h b/gdb/tm-news.h new file mode 100644 index 0000000..ff50dbf --- /dev/null +++ b/gdb/tm-news.h @@ -0,0 +1,172 @@ +/* Parameters for execution on a Sony/NEWS, for GDB, the GNU debugger. + Copyright (C) 1987, 1989 Free Software Foundation, Inc. + +This file is part of GDB. + +GDB 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 1, or (at your option) +any later version. + +GDB 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 GDB; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + +/* See following cpu type determination macro to get the machine type. + +Here is an m-news.h file for gdb. It supports the 68881 registers. + by hikichi@srava.sra.junet + +* Support Sun assembly format instead of Motorola one. +* Ptrace for handling floating register has a bug(before NEWS OS version 2.2), +* After NEWS OS version 3.2, some of ptrace's bug is fixed. + But we cannot change the floating register(see adb(1) in OS 3.2) yet. */ + +/* Define this if the C compiler puts an underscore at the front + of external names before giving them to the linker. */ + +#define NAMES_HAVE_UNDERSCORE + +/* Symbols on this machine are in DBX format. */ +#define READ_DBX_FORMAT + +/* Use to compute STACK_END_ADDR. */ +#define TARGET_UPAGES 2 +#define TARGET_NBPG 4096 + +/* Address of end of stack space. */ + +#define STACK_END_ADDR (0x80000000 - TARGET_UPAGES * TARGET_NBPG) + +/* Extract from an array REGBUF containing the (raw) register state + a function return value of type TYPE, and copy that, in virtual format, + into VALBUF. */ + +/* when it return the floating value, use the FP0 in NEWS. */ +#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \ + { if (TYPE_CODE (TYPE) == TYPE_CODE_FLT) \ + { \ + REGISTER_CONVERT_TO_VIRTUAL (FP0_REGNUM, \ + ®BUF[REGISTER_BYTE (FP0_REGNUM)], VALBUF); \ + } \ + else \ + bcopy (REGBUF, VALBUF, TYPE_LENGTH (TYPE)); } + +/* Write into appropriate registers a function return value + of type TYPE, given in virtual format. */ + +/* when it return the floating value, use the FP0 in NEWS. */ +#define STORE_RETURN_VALUE(TYPE,VALBUF) \ + { if (TYPE_CODE (TYPE) == TYPE_CODE_FLT) \ + { \ + char raw_buf[REGISTER_RAW_SIZE (FP0_REGNUM)]; \ + REGISTER_CONVERT_TO_RAW (FP0_REGNUM, VALBUF, raw_buf); \ + write_register_bytes (FP0_REGNUM, \ + raw_buf, REGISTER_RAW_SIZE (FP0_REGNUM)); \ + } \ + else \ + write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE)); } + +/* Return number of args passed to a frame. + Can return -1, meaning no way to tell. */ + +#define FRAME_NUM_ARGS(val, fi) \ +{ register CORE_ADDR pc = FRAME_SAVED_PC (fi); \ + register int insn = 0177777 & read_memory_integer (pc, 2); \ + val = 0; \ + if (insn == 0047757 || insn == 0157374) /* lea W(sp),sp or addaw #W,sp */ \ + val = read_memory_integer (pc + 2, 2); \ + else if ((insn & 0170777) == 0050217 /* addql #N, sp */ \ + || (insn & 0170777) == 0050117) /* addqw */ \ + { val = (insn >> 9) & 7; if (val == 0) val = 8; } \ + else if (insn == 0157774) /* addal #WW, sp */ \ + val = read_memory_integer (pc + 2, 4); \ + val >>= 2; } + +/* Things needed for making the inferior call functions. */ +#define PUSH_DUMMY_FRAME \ +{ register CORE_ADDR sp = read_register (SP_REGNUM); \ + register int regnum; \ + char raw_buffer[12]; \ + sp = push_word (sp, read_register (PC_REGNUM)); \ + sp = push_word (sp, read_register (FP_REGNUM)); \ + write_register (FP_REGNUM, sp); \ + for (regnum = FP0_REGNUM + 7; regnum >= FP0_REGNUM; regnum--) \ + { read_register_bytes (REGISTER_BYTE (regnum), raw_buffer, 12); \ + sp = push_bytes (sp, raw_buffer, 12); } \ + for (regnum = FP_REGNUM - 1; regnum >= 0; regnum--) \ + sp = push_word (sp, read_register (regnum)); \ + sp = push_word (sp, read_register (PS_REGNUM)); \ + write_register (SP_REGNUM, sp); } + +/* Discard from the stack the innermost frame, restoring all registers. */ + +#define POP_FRAME \ +{ register FRAME frame = get_current_frame (); \ + register CORE_ADDR fp; \ + register int regnum; \ + struct frame_saved_regs fsr; \ + struct frame_info *fi; \ + char raw_buffer[12]; \ + fi = get_frame_info (frame); \ + fp = fi->frame; \ + get_frame_saved_regs (fi, &fsr); \ + for (regnum = FP0_REGNUM + 7; regnum >= FP0_REGNUM; regnum--) \ + if (fsr.regs[regnum]) \ + { read_memory (fsr.regs[regnum], raw_buffer, 12); \ + write_register_bytes (REGISTER_BYTE (regnum), raw_buffer, 12); }\ + for (regnum = FP_REGNUM - 1; regnum >= 0; regnum--) \ + if (fsr.regs[regnum]) \ + write_register (regnum, read_memory_integer (fsr.regs[regnum], 4)); \ + if (fsr.regs[PS_REGNUM]) \ + write_register (PS_REGNUM, read_memory_integer (fsr.regs[PS_REGNUM], 4)); \ + write_register (FP_REGNUM, read_memory_integer (fp, 4)); \ + write_register (PC_REGNUM, read_memory_integer (fp + 4, 4)); \ + write_register (SP_REGNUM, fp + 8); \ + flush_cached_frames (); \ + set_current_frame (create_new_frame (read_register (FP_REGNUM), \ + read_pc ())); } + +/* This sequence of words is the instructions + fmove.m #<f0-f7>,-(sp) + movem.l 0xfffc,-(sp) ;; no save a6(fp) and a7(sp) + clr.w -(sp) + move.w ccr,-(sp) + /..* The arguments are pushed at this point by GDB; + no code is needed in the dummy for this. + The CALL_DUMMY_START_OFFSET gives the position of + the following jsr instruction. *../ + jbsr (#32323232) + add.l #69696969,sp + bpt + nop +Note this is 24 bytes. +We actually start executing at the jsr, since the pushing of the +registers is done by PUSH_DUMMY_FRAME. If this were real code, +the arguments for the function called by the jsr would be pushed +between the moveml and the jsr, and we could allow it to execute through. +But the arguments have to be pushed by GDB after the PUSH_DUMMY_FRAME is done, +and we cannot allow the moveml to push the registers again lest they be +taken for the arguments. */ + +#define CALL_DUMMY {0xf227e0ff, 0x48e7fffc, 0x426742e7, 0x4eb93232, 0x3232dffc, 0x69696969, 0x4e4f4e71} + +#define CALL_DUMMY_LENGTH 28 + +#define CALL_DUMMY_START_OFFSET 12 + +/* Insert the specified number of args and function address + into a call sequence of the above form stored at DUMMYNAME. */ + +#define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p) \ +{ *(int *)((char *) dummyname + 20) = nargs * 4; \ + *(int *)((char *) dummyname + 14) = fun; } + +#define HAVE_68881 + +#include "tm-68k.h" |