diff options
Diffstat (limited to 'gdb/tm-m88k.h')
| -rw-r--r-- | gdb/tm-m88k.h | 171 |
1 files changed, 45 insertions, 126 deletions
diff --git a/gdb/tm-m88k.h b/gdb/tm-m88k.h index 423594d..f562f86 100644 --- a/gdb/tm-m88k.h +++ b/gdb/tm-m88k.h @@ -1,4 +1,5 @@ -/* Copyright (C) 1986, 1987, 1988, 1989, 1990 Free Software Foundation, Inc. +/* Target machine description for generic Motorola 88000, for GDB. + Copyright 1986, 1987, 1988, 1989, 1990, 1991 Free Software Foundation, Inc. This file is part of GDB. @@ -16,97 +17,36 @@ 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ -/* This is currently for a 88000 running DGUX. If other 88k ports are - done, OS-specific stuff should be moved (see tm-68k.h, for example). */ /* g++ support is not yet included. */ -#include "tdesc.h" - -#if !defined (DGUX) -#define DGUX 1 -#endif - #define TARGET_BYTE_ORDER BIG_ENDIAN -#define EXTRA_SYMTAB_INFO int coffsem; - -/* This is not a CREATE_INFERIOR_HOOK because it also applies to - remote debugging. */ -#define START_INFERIOR_HOOK() \ - { \ - extern int safe_to_init_tdesc_context; \ - extern dc_handle_t tdesc_handle; \ - \ - safe_to_init_tdesc_context = 0; \ - if (tdesc_handle) \ - { \ - dc_terminate (tdesc_handle); \ - tdesc_handle = 0; \ - } \ - } - -dc_dcontext_t get_prev_context (); -extern int stack_error; - -#define EXTRA_FRAME_INFO dc_dcontext_t frame_context; -#define INIT_EXTRA_FRAME_INFO(fromleaf, fci) \ - { \ - if (fci->next_frame != NULL) \ - { \ - extern jmp_buf stack_jmp; \ - struct frame_info *next_frame = fci->next; \ - /* The call to get_prev_context */ \ - /* will update current_context for us. */ \ - stack_error = 1; \ - if (!setjmp (stack_jmp)) \ - { \ - fci->frame_context \ - = get_prev_context (next_frame->frame_context); \ - stack_error = 0; \ - } \ - else \ - { \ - stack_error = 0; \ - next_frame->prev = 0; \ - return 0; \ - } \ - if (!fci->frame_context) \ - { \ - next_frame->prev = 0; \ - return 0; \ - } \ - } \ - else \ - { \ - /* We are creating an arbitrary frame */ \ - /* (i.e. we are in create_new_frame). */ \ - extern dc_dcontext_t current_context; \ - \ - fci->frame_context = current_context; \ - } \ - } - -#define INIT_FRAME_PC(fromleaf, prev) \ - { \ - prev->pc = dc_location (prev->frame_context); \ - prev->frame = get_frame_base (prev->pc); \ - } +/* We cache information about saved registers in the frame structure, + to save us from having to re-scan function prologues every time + a register in a non-current frame is accessed. */ -#define IEEE_FLOAT +#define EXTRA_FRAME_INFO \ + struct frame_saved_regs *fsr; \ + CORE_ADDR locals_pointer; \ + CORE_ADDR args_pointer; + +/* Zero the frame_saved_regs pointer when the frame is initialized, + so that FRAME_FIND_SAVED_REGS () will know to allocate and + initialize a frame_saved_regs struct the first time it is called. + Set the arg_pointer to -1, which is not valid; 0 and other values + indicate real, cached values. */ -/* Text Description (TDESC) is used by m88k to maintain stack & reg info */ +#define INIT_EXTRA_FRAME_INFO(fromleaf, fi) \ + init_extra_frame_info (fromleaf, fi) +extern void init_extra_frame_info (); -#define TDESC +#define IEEE_FLOAT /* Define this if the C compiler puts an underscore at the front of external names before giving them to the linker. */ #define NAMES_HAVE_UNDERSCORE -/* Hook for read_relative_register_raw_bytes */ - -#define READ_RELATIVE_REGISTER_RAW_BYTES - /* Offset from address of function to start of its code. Zero on most machines. */ @@ -115,7 +55,9 @@ extern int stack_error; /* Advance PC across any function entry prologue instructions to reach some "real" code. */ -#define SKIP_PROLOGUE(frompc) 0 +#define SKIP_PROLOGUE(frompc) \ + skip_prologue (frompc) +extern CORE_ADDR skip_prologue (); /* The m88k kernel aligns all instructions on 4-byte boundaries. The kernel also uses the least significant two bits for its own hocus @@ -133,27 +75,7 @@ extern int stack_error; some instructions. */ #define SAVED_PC_AFTER_CALL(frame) \ - (read_register (SRP_REGNUM) & (~3)) - -/* Address of end of stack space. */ - -#define STACK_END_ADDR 0xF0000000 - -/* Stack grows downward. */ - -#define INNER_THAN < - -/* Sequence of bytes for breakpoint instruction. */ - -/* instruction 0xF000D1FF is 'tb0 0,r0,511' - If Bit bit 0 of r0 is clear (always true), - initiate exception processing (trap). - */ -#define BREAKPOINT {0xF0, 0x00, 0xD1, 0xFF} - -/* Address of end of stack space. */ - -#define STACK_END_ADDR 0xF0000000 + (ADDR_BITS_REMOVE (read_register (SRP_REGNUM))) /* Stack grows downward. */ @@ -179,7 +101,7 @@ extern int stack_error; #define ABOUT_TO_RETURN(pc) (read_memory_integer (pc, 2) == 0xF800) /* Return 1 if P points to an invalid floating point value. - LEN is the length in bytes -- not relevant on the 386. */ + LEN is the length in bytes. */ #define INVALID_FLOAT(p, len) IEEE_isNAN(p,len) @@ -271,7 +193,7 @@ extern int stack_error; #define SRP_REGNUM 1 /* Contains subroutine return pointer */ #define RV_REGNUM 2 /* Contains simple return values */ #define SRA_REGNUM 12 /* Contains address of struct return values */ -#define FP_REGNUM 30 /* Contains address of executing stack frame */ +#define FP_REGNUM 31 /* Reg fetched to locate frame when pgm stops */ #define SP_REGNUM 31 /* Contains address of top of stack */ #define SXIP_REGNUM 35 /* Contains Shadow Execute Instruction Pointer */ #define SNIP_REGNUM 36 /* Contains Shadow Next Instruction Pointer */ @@ -382,38 +304,41 @@ extern int stack_error; #define BELIEVE_PCC_PROMOTION 1 -/* We provide our own get_saved_register in m88k-tdep.c. */ -#define GET_SAVED_REGISTER - /* Describe the pointer in each stack frame to the previous stack frame (its caller). */ /* FRAME_CHAIN takes a frame's nominal address and produces the frame's chain-pointer. - FRAME_CHAIN_COMBINE takes the chain pointer and the frame's nominal address - and produces the nominal address of the caller frame. - However, if FRAME_CHAIN_VALID returns zero, - it means the given frame is the outermost one and has no caller. - In that case, FRAME_CHAIN_COMBINE is not used. */ + it means the given frame is the outermost one and has no caller. */ -/* These are just dummies for the 88k because INIT_FRAME_PC sets prev->frame - instead. */ +extern CORE_ADDR frame_chain (); +extern int frame_chain_valid (); +extern int frameless_function_invocation (); -#define FRAME_CHAIN(thisframe) (0) +#define FRAME_CHAIN(thisframe) \ + frame_chain (thisframe) -#define FRAME_CHAIN_VALID(chain, thisframe) (1) +#define FRAME_CHAIN_VALID(chain, thisframe) \ + frame_chain_valid (chain, thisframe) -#define FRAME_CHAIN_COMBINE(chain, thisframe) (0) +#define FRAMELESS_FUNCTION_INVOCATION(frame, fromleaf) \ + fromleaf = frameless_function_invocation (frame) /* Define other aspects of the stack frame. */ -#define FRAME_SAVED_PC(FRAME) (read_memory_integer ((FRAME)->frame+4, 4)) +#define FRAME_SAVED_PC(FRAME) \ + frame_saved_pc (FRAME) +extern CORE_ADDR frame_saved_pc (); -#define FRAME_ARGS_ADDRESS(fi) ((fi)->frame) +#define FRAME_ARGS_ADDRESS(fi) \ + frame_args_address (fi) +extern CORE_ADDR frame_args_address (); -#define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame) +#define FRAME_LOCALS_ADDRESS(fi) \ + frame_locals_address (fi) +extern CORE_ADDR frame_locals_address (); /* Return number of args passed to a frame. Can return -1, meaning no way to tell. */ @@ -471,11 +396,5 @@ extern int stack_error; calling function only expects to have the "preserved" registers restored. Thus, those are the only ones that we even try to restore here. */ -extern void pop_frame (); - #define POP_FRAME pop_frame () - -/* BCS is a standard for binary compatibility. This machine uses it. */ -#if !defined (BCS) -#define BCS 1 -#endif +extern void pop_frame (); |