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Diffstat (limited to 'gdb/config/m68k/tm-linux.h')
| -rw-r--r-- | gdb/config/m68k/tm-linux.h | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/gdb/config/m68k/tm-linux.h b/gdb/config/m68k/tm-linux.h new file mode 100644 index 00000000000..6c119982ff5 --- /dev/null +++ b/gdb/config/m68k/tm-linux.h @@ -0,0 +1,109 @@ +/* Definitions to target GDB to Linux on m680x0 + Copyright (C) 1996,1998 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-sysv4.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) 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 PARAMS ((struct frame_info *)); + +#define IN_SIGTRAMP(pc,name) in_sigtramp (pc) +extern int in_sigtramp PARAMS ((CORE_ADDR pc)); |