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markom |
/* Definitions to target GDB to Linux on m680x0
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Copyright (C) 1996,1998 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/* Number of traps that happen between exec'ing the shell to run an
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inferior, and when we finally get to the inferior code. This is 2
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on most implementations. */
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#define START_INFERIOR_TRAPS_EXPECTED 2
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/* The following definitions are appropriate when using the ELF
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format, where floating point values are returned in fp0, pointer
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values in a0 and other values in d0. */
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/* Extract from an array REGBUF containing the (raw) register state a
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function return value of type TYPE, and copy that, in virtual
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format, into VALBUF. */
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#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
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{ \
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if (TYPE_CODE (TYPE) == TYPE_CODE_FLT) \
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{ \
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REGISTER_CONVERT_TO_VIRTUAL (FP0_REGNUM, TYPE, \
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((char *) (REGBUF) \
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+ REGISTER_BYTE (FP0_REGNUM)), \
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VALBUF); \
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} \
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else if (TYPE_CODE (TYPE) == TYPE_CODE_PTR) \
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memcpy (VALBUF, (char *) (REGBUF) + REGISTER_BYTE (A0_REGNUM), \
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TYPE_LENGTH (TYPE)); \
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else \
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memcpy (VALBUF, \
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((char *) (REGBUF) \
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+ (TYPE_LENGTH (TYPE) >= 4 ? 0 : 4 - TYPE_LENGTH (TYPE))), \
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TYPE_LENGTH (TYPE)); \
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}
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/* Write into appropriate registers a function return value of type
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TYPE, given in virtual format. */
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#define STORE_RETURN_VALUE(TYPE,VALBUF) \
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{ \
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if (TYPE_CODE (TYPE) == TYPE_CODE_FLT) \
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{ \
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char raw_buffer[REGISTER_RAW_SIZE (FP0_REGNUM)]; \
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REGISTER_CONVERT_TO_RAW (TYPE, FP0_REGNUM, VALBUF, raw_buffer); \
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write_register_bytes (REGISTER_BYTE (FP0_REGNUM), \
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raw_buffer, TYPE_LENGTH (TYPE)); \
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} \
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else \
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{ \
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if (TYPE_CODE (TYPE) == TYPE_CODE_PTR) \
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write_register_bytes (REGISTER_BYTE (A0_REGNUM), VALBUF, \
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TYPE_LENGTH (TYPE)); \
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write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE)); \
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} \
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}
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#include "tm-linux.h"
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#include "m68k/tm-m68k.h"
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/* Extract from an array REGBUF containing the (raw) register state
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the address in which a function should return its structure value,
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as a CORE_ADDR (or an expression that can be used as one). */
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#undef EXTRACT_STRUCT_VALUE_ADDRESS
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#define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \
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(*(CORE_ADDR *)((char *) (REGBUF) + REGISTER_BYTE (A0_REGNUM)))
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/* Offsets (in target ints) into jmp_buf. */
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#define JB_ELEMENT_SIZE 4
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#define JB_PC 7
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/* Figure out where the longjmp will land. Slurp the args out of the stack.
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We expect the first arg to be a pointer to the jmp_buf structure from which
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we extract the pc (JB_PC) that we will land at. The pc is copied into ADDR.
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This routine returns true on success */
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#define GET_LONGJMP_TARGET(ADDR) get_longjmp_target(ADDR)
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/* Offset to saved PC in sigcontext, from <asm/sigcontext.h>. */
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#define SIGCONTEXT_PC_OFFSET 26
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#undef FRAME_SAVED_PC
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#define FRAME_SAVED_PC(FRAME) \
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(((FRAME)->signal_handler_caller \
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? sigtramp_saved_pc (FRAME) \
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: read_memory_integer ((FRAME)->frame + 4, 4)))
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extern CORE_ADDR sigtramp_saved_pc PARAMS ((struct frame_info *));
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#define IN_SIGTRAMP(pc,name) in_sigtramp (pc)
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extern int in_sigtramp PARAMS ((CORE_ADDR pc));
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