| /* Parameters for execution on a Sun, for GDB, the GNU debugger. |
| Copyright 1986, 1987, 1989, 1992, 1993, 1994, 1996, 2000 |
| 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. */ |
| |
| #ifndef TM_SUN3_H |
| #define TM_SUN3_H |
| |
| /* Sun3 status includes fpflags, which shows whether the FPU has been used |
| by the process, and whether the FPU was done with an instruction or |
| was interrupted in the middle of a long instruction. See |
| <machine/reg.h>. */ |
| /* a&d, pc,sr, fp, fpstat, fpflags */ |
| |
| #define REGISTER_BYTES (16*4 + 8 + 8*12 + 3*4 + 4) |
| |
| #define NUM_REGS 31 |
| |
| #define REGISTER_BYTES_OK(b) \ |
| ((b) == REGISTER_BYTES \ |
| || (b) == REGISTER_BYTES_FP \ |
| || (b) == REGISTER_BYTES_NOFP) |
| |
| /* If PC contains this instruction, then we know what we are in a system |
| call stub, and the return PC is is at SP+4, instead of SP. */ |
| |
| #define SYSCALL_TRAP 0x4e40 /* trap #0 */ |
| #define SYSCALL_TRAP_OFFSET 0 /* PC points at trap instruction */ |
| |
| #include "m68k/tm-m68k.h" |
| |
| /* Disable alternate breakpoint mechanism needed by 68k stub. */ |
| #undef REMOTE_BREAKPOINT |
| |
| /* Offsets (in target ints) into jmp_buf. Not defined by Sun, but at least |
| documented in a comment in <machine/setjmp.h>! */ |
| |
| #define JB_ELEMENT_SIZE 4 |
| |
| #define JB_ONSSTACK 0 |
| #define JB_SIGMASK 1 |
| #define JB_SP 2 |
| #define JB_PC 3 |
| #define JB_PSL 4 |
| #define JB_D2 5 |
| #define JB_D3 6 |
| #define JB_D4 7 |
| #define JB_D5 8 |
| #define JB_D6 9 |
| #define JB_D7 10 |
| #define JB_A2 11 |
| #define JB_A3 12 |
| #define JB_A4 13 |
| #define JB_A5 14 |
| #define JB_A6 15 |
| |
| /* Figure out where the longjmp will land. Slurp the args out of the stack. |
| We expect the first arg to be a pointer to the jmp_buf structure from which |
| we extract the pc (JB_PC) that we will land at. The pc is copied into ADDR. |
| This routine returns true on success */ |
| |
| #define GET_LONGJMP_TARGET(ADDR) m68k_get_longjmp_target(ADDR) |
| |
| /* If sun3 pcc says that a parameter is a short, it's a short. */ |
| #define BELIEVE_PCC_PROMOTION_TYPE 1 |
| |
| /* Can't define BELIEVE_PCC_PROMOTION for SunOS /bin/cc of SunOS 4.1.1. |
| Apparently Sun fixed this for the sparc but not the sun3. */ |
| |
| /* The code which tries to deal with this bug is never harmful on a sun3. */ |
| #define SUN_FIXED_LBRAC_BUG (0) |
| |
| /* On the sun3 the kernel pushes a sigcontext on the user stack and |
| then `calls' _sigtramp in user code. _sigtramp saves the floating |
| point status on the stack and calls the signal handler |
| function. The stack does not contain enough information to allow a |
| normal backtrace, but sigcontext contains the saved user |
| pc/sp. DEPRECATED_FRAME_CHAIN and friends in tm-m68k.h and |
| m68k_find_saved_regs deal with this situation by manufacturing a |
| fake frame for _sigtramp. SIG_PC_FP_OFFSET is the offset from the |
| signal handler frame to the saved pc in sigcontext. |
| SIG_SP_FP_OFFSET is the offset from the signal handler frame to the |
| end of sigcontext which is identical to the saved sp at |
| SIG_PC_FP_OFFSET - 4. |
| |
| Please note that it is impossible to correctly backtrace from a breakpoint |
| in _sigtramp as _sigtramp modifies the stack pointer a few times. */ |
| |
| #undef SIG_PC_FP_OFFSET |
| #define SIG_PC_FP_OFFSET 324 |
| #define SIG_SP_FP_OFFSET 332 |
| |
| #endif /* TM_SUN3_H */ |