projects / binutils.git / blame
| Commit | Line | Data |
|---|---|---|
| dd3b648e RP |
1 | /* Parameters for execution on a Sun, for GDB, the GNU debugger. |
| 2 | Copyright (C) 1986, 1987, 1989 Free Software Foundation, Inc. | |
| 3 | ||
| 4 | This file is part of GDB. | |
| 5 | ||
| 99a7de40 | 6 | This program is free software; you can redistribute it and/or modify |
| dd3b648e | 7 | it under the terms of the GNU General Public License as published by |
| 99a7de40 JG |
8 | the Free Software Foundation; either version 2 of the License, or |
| 9 | (at your option) any later version. | |
| dd3b648e | 10 | |
| 99a7de40 | 11 | This program is distributed in the hope that it will be useful, |
| dd3b648e RP |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 14 | GNU General Public License for more details. | |
| 15 | ||
| 16 | You should have received a copy of the GNU General Public License | |
| 99a7de40 JG |
17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
| dd3b648e RP |
19 | |
| 20 | #define HAVE_68881 | |
| 21 | ||
| 39d2bcca JK |
22 | /* TARGET_SUN3 might be a more logical name, but that's used by |
| 23 | ../include/target.h (included by ../include/a.out.gnu.h). */ | |
| 24 | #define GDB_TARGET_IS_SUN3 1 | |
| 696d660b | 25 | |
| dd3b648e RP |
26 | #include "tm-68k.h" |
| 27 | ||
| 28 | /* Define this if the C compiler puts an underscore at the front | |
| 29 | of external names before giving them to the linker. */ | |
| 30 | ||
| 31 | #define NAMES_HAVE_UNDERSCORE | |
| 32 | ||
| 33 | /* Debugger information will be in DBX format. */ | |
| 34 | ||
| 35 | #define READ_DBX_FORMAT | |
| 36 | ||
| 37 | /* Address of the end of stack space. We get this from the system | |
| 38 | include files. */ | |
| 39 | #include <sys/types.h> | |
| 40 | #include <machine/vmparam.h> | |
| 41 | #define STACK_END_ADDR USRSTACK | |
| 42 | \f | |
| 43 | /* Things needed for making the inferior call functions. */ | |
| 44 | ||
| 45 | /* Push an empty stack frame, to record the current PC, etc. */ | |
| 46 | ||
| 47 | #define PUSH_DUMMY_FRAME \ | |
| 48 | { register CORE_ADDR sp = read_register (SP_REGNUM); \ | |
| 49 | register int regnum; \ | |
| 50 | char raw_buffer[12]; \ | |
| 51 | sp = push_word (sp, read_register (PC_REGNUM)); \ | |
| 52 | sp = push_word (sp, read_register (FP_REGNUM)); \ | |
| 53 | write_register (FP_REGNUM, sp); \ | |
| 54 | for (regnum = FP0_REGNUM + 7; regnum >= FP0_REGNUM; regnum--) \ | |
| 55 | { read_register_bytes (REGISTER_BYTE (regnum), raw_buffer, 12); \ | |
| 56 | sp = push_bytes (sp, raw_buffer, 12); } \ | |
| 57 | for (regnum = FP_REGNUM - 1; regnum >= 0; regnum--) \ | |
| 58 | sp = push_word (sp, read_register (regnum)); \ | |
| 59 | sp = push_word (sp, read_register (PS_REGNUM)); \ | |
| 60 | write_register (SP_REGNUM, sp); } | |
| 61 | ||
| 62 | /* Discard from the stack the innermost frame, | |
| 63 | restoring all saved registers. */ | |
| 64 | ||
| 65 | #define POP_FRAME \ | |
| 66 | { register FRAME frame = get_current_frame (); \ | |
| 67 | register CORE_ADDR fp; \ | |
| 68 | register int regnum; \ | |
| 69 | struct frame_saved_regs fsr; \ | |
| 70 | struct frame_info *fi; \ | |
| 71 | char raw_buffer[12]; \ | |
| 72 | fi = get_frame_info (frame); \ | |
| 73 | fp = fi->frame; \ | |
| 74 | get_frame_saved_regs (fi, &fsr); \ | |
| 75 | for (regnum = FP0_REGNUM + 7; regnum >= FP0_REGNUM; regnum--) \ | |
| 76 | if (fsr.regs[regnum]) \ | |
| 77 | { read_memory (fsr.regs[regnum], raw_buffer, 12); \ | |
| 78 | write_register_bytes (REGISTER_BYTE (regnum), raw_buffer, 12); }\ | |
| 79 | for (regnum = FP_REGNUM - 1; regnum >= 0; regnum--) \ | |
| 80 | if (fsr.regs[regnum]) \ | |
| 81 | write_register (regnum, read_memory_integer (fsr.regs[regnum], 4)); \ | |
| 82 | if (fsr.regs[PS_REGNUM]) \ | |
| 83 | write_register (PS_REGNUM, read_memory_integer (fsr.regs[PS_REGNUM], 4)); \ | |
| 84 | write_register (FP_REGNUM, read_memory_integer (fp, 4)); \ | |
| 85 | write_register (PC_REGNUM, read_memory_integer (fp + 4, 4)); \ | |
| 86 | write_register (SP_REGNUM, fp + 8); \ | |
| 87 | flush_cached_frames (); \ | |
| 88 | set_current_frame (create_new_frame (read_register (FP_REGNUM), \ | |
| 89 | read_pc ())); } | |
| 90 | ||
| 91 | /* This sequence of words is the instructions | |
| 92 | fmovem 0xff,-(sp) | |
| 93 | moveml 0xfffc,-(sp) | |
| 94 | clrw -(sp) | |
| 95 | movew ccr,-(sp) | |
| 96 | /..* The arguments are pushed at this point by GDB; | |
| 97 | no code is needed in the dummy for this. | |
| 98 | The CALL_DUMMY_START_OFFSET gives the position of | |
| 99 | the following jsr instruction. *../ | |
| 100 | jsr @#32323232 | |
| 101 | addl #69696969,sp | |
| 102 | trap #15 | |
| 103 | nop | |
| 104 | Note this is 28 bytes. | |
| 105 | We actually start executing at the jsr, since the pushing of the | |
| 106 | registers is done by PUSH_DUMMY_FRAME. If this were real code, | |
| 107 | the arguments for the function called by the jsr would be pushed | |
| 108 | between the moveml and the jsr, and we could allow it to execute through. | |
| 109 | But the arguments have to be pushed by GDB after the PUSH_DUMMY_FRAME is done, | |
| 110 | and we cannot allow the moveml to push the registers again lest they be | |
| 111 | taken for the arguments. */ | |
| 112 | ||
| 113 | #define CALL_DUMMY {0xf227e0ff, 0x48e7fffc, 0x426742e7, 0x4eb93232, 0x3232dffc, 0x69696969, 0x4e4f4e71} | |
| 114 | ||
| 115 | #define CALL_DUMMY_LENGTH 28 | |
| 116 | ||
| 117 | #define CALL_DUMMY_START_OFFSET 12 | |
| 118 | ||
| 119 | /* Insert the specified number of args and function address | |
| 120 | into a call sequence of the above form stored at DUMMYNAME. */ | |
| 121 | ||
| 122 | #define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p) \ | |
| 123 | { *(int *)((char *) dummyname + 20) = nargs * 4; \ | |
| 124 | *(int *)((char *) dummyname + 14) = fun; } |