| /* Definitions to target GDB to Linux on m680x0 |
| Copyright 1996, 1998, 1999, 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. */ |
| |
| /* Number of traps that happen between exec'ing the shell to run an |
| inferior, and when we finally get to the inferior code. This is 2 |
| on most implementations. */ |
| |
| #define START_INFERIOR_TRAPS_EXPECTED 2 |
| |
| /* The following definitions are appropriate when using the ELF |
| format, where floating point values are returned in fp0, pointer |
| values in a0 and other values in d0. */ |
| |
| /* 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. */ |
| |
| #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \ |
| { \ |
| if (TYPE_CODE (TYPE) == TYPE_CODE_FLT) \ |
| { \ |
| REGISTER_CONVERT_TO_VIRTUAL (FP0_REGNUM, TYPE, \ |
| ((char *) (REGBUF) \ |
| + REGISTER_BYTE (FP0_REGNUM)), \ |
| VALBUF); \ |
| } \ |
| else if (TYPE_CODE (TYPE) == TYPE_CODE_PTR) \ |
| memcpy (VALBUF, (char *) (REGBUF) + REGISTER_BYTE (A0_REGNUM), \ |
| TYPE_LENGTH (TYPE)); \ |
| else \ |
| memcpy (VALBUF, \ |
| ((char *) (REGBUF) \ |
| + (TYPE_LENGTH (TYPE) >= 4 ? 0 : 4 - TYPE_LENGTH (TYPE))), \ |
| TYPE_LENGTH (TYPE)); \ |
| } |
| |
| /* Write into appropriate registers a function return value of type |
| TYPE, given in virtual format. */ |
| |
| #define STORE_RETURN_VALUE(TYPE,VALBUF) \ |
| { \ |
| if (TYPE_CODE (TYPE) == TYPE_CODE_FLT) \ |
| { \ |
| char raw_buffer[REGISTER_RAW_SIZE (FP0_REGNUM)]; \ |
| REGISTER_CONVERT_TO_RAW (TYPE, FP0_REGNUM, VALBUF, raw_buffer); \ |
| write_register_bytes (REGISTER_BYTE (FP0_REGNUM), \ |
| raw_buffer, TYPE_LENGTH (TYPE)); \ |
| } \ |
| else \ |
| { \ |
| if (TYPE_CODE (TYPE) == TYPE_CODE_PTR) \ |
| write_register_bytes (REGISTER_BYTE (A0_REGNUM), VALBUF, \ |
| TYPE_LENGTH (TYPE)); \ |
| write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE)); \ |
| } \ |
| } |
| |
| #include "tm-linux.h" |
| #include "m68k/tm-m68k.h" |
| |
| /* Extract from an array REGBUF containing the (raw) register state |
| the address in which a function should return its structure value, |
| as a CORE_ADDR (or an expression that can be used as one). */ |
| |
| #undef EXTRACT_STRUCT_VALUE_ADDRESS |
| #define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \ |
| (*(CORE_ADDR *)((char *) (REGBUF) + REGISTER_BYTE (A0_REGNUM))) |
| |
| /* Offsets (in target ints) into jmp_buf. */ |
| |
| #define JB_ELEMENT_SIZE 4 |
| #define JB_PC 7 |
| |
| /* 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) |
| |
| /* Offset to saved PC in sigcontext, from <asm/sigcontext.h>. */ |
| #define SIGCONTEXT_PC_OFFSET 26 |
| |
| #undef FRAME_SAVED_PC |
| #define FRAME_SAVED_PC(FRAME) \ |
| (((FRAME)->signal_handler_caller \ |
| ? sigtramp_saved_pc (FRAME) \ |
| : read_memory_integer ((FRAME)->frame + 4, 4))) |
| |
| extern CORE_ADDR sigtramp_saved_pc (struct frame_info *); |
| |
| #define IN_SIGTRAMP(pc,name) in_sigtramp (pc) |
| extern int in_sigtramp (CORE_ADDR pc); |