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Diffstat (limited to 'gdb/config/arm/tm-arm.h')
| -rw-r--r-- | gdb/config/arm/tm-arm.h | 453 |
1 files changed, 453 insertions, 0 deletions
diff --git a/gdb/config/arm/tm-arm.h b/gdb/config/arm/tm-arm.h new file mode 100644 index 00000000000..b327ac381f2 --- /dev/null +++ b/gdb/config/arm/tm-arm.h @@ -0,0 +1,453 @@ +/* Definitions to make GDB target for an ARM + Copyright 1986, 1987, 1989, 1991, 1993, 1997, 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. */ + +#ifdef __STDC__ /* Forward decls for prototypes */ +struct type; +struct value; +#endif + +#define TARGET_BYTE_ORDER_SELECTABLE + +/* IEEE format floating point */ + +#define IEEE_FLOAT + +/* FIXME: may need a floatformat_ieee_double_bigbyte_littleword format for + BIG_ENDIAN use. -fnf */ + +#define TARGET_DOUBLE_FORMAT (target_byte_order == BIG_ENDIAN \ + ? &floatformat_ieee_double_big \ + : &floatformat_ieee_double_littlebyte_bigword) + +/* When reading symbols, we need to zap the low bit of the address, which + may be set to 1 for Thumb functions. */ + +#define SMASH_TEXT_ADDRESS(addr) ((addr) &= ~0x1) + +/* Remove useless bits from addresses in a running program. */ + +CORE_ADDR arm_addr_bits_remove PARAMS ((CORE_ADDR)); + +#define ADDR_BITS_REMOVE(val) (arm_addr_bits_remove (val)) + +/* Offset from address of function to start of its code. + Zero on most machines. */ + +#define FUNCTION_START_OFFSET 0 + +/* Advance PC across any function entry prologue instructions + to reach some "real" code. */ + +extern CORE_ADDR arm_skip_prologue PARAMS ((CORE_ADDR pc)); + +#define SKIP_PROLOGUE(pc) { pc = arm_skip_prologue (pc); } + +/* Immediately after a function call, return the saved pc. + Can't always go through the frames for this because on some machines + the new frame is not set up until the new function executes + some instructions. */ + +#define SAVED_PC_AFTER_CALL(frame) arm_saved_pc_after_call (frame) +struct frame_info; +extern CORE_ADDR arm_saved_pc_after_call PARAMS ((struct frame_info *)); + +/* I don't know the real values for these. */ +#define TARGET_UPAGES UPAGES +#define TARGET_NBPG NBPG + +/* Address of end of stack space. */ + +#define STACK_END_ADDR (0x01000000 - (TARGET_UPAGES * TARGET_NBPG)) + +/* Stack grows downward. */ + +#define INNER_THAN(lhs,rhs) ((lhs) < (rhs)) + +/* !!!! if we're using RDP, then we're inserting breakpoints and storing + their handles instread of what was in memory. It is nice that + this is the same size as a handle - otherwise remote-rdp will + have to change. */ + +/* BREAKPOINT_FROM_PC uses the program counter value to determine whether a + 16- or 32-bit breakpoint should be used. It returns a pointer + to a string of bytes that encode a breakpoint instruction, stores + the length of the string to *lenptr, and adjusts the pc (if necessary) to + point to the actual memory location where the breakpoint should be + inserted. */ + +extern breakpoint_from_pc_fn arm_breakpoint_from_pc; +#define BREAKPOINT_FROM_PC(pcptr, lenptr) arm_breakpoint_from_pc (pcptr, lenptr) + +/* Amount PC must be decremented by after a breakpoint. + This is often the number of bytes in BREAKPOINT + but not always. */ + +#define DECR_PC_AFTER_BREAK 0 + +/* code to execute to print interesting information about the + * floating point processor (if any) + * No need to define if there is nothing to do. + */ +#define FLOAT_INFO { arm_float_info (); } + +/* Say how long (ordinary) registers are. This is a piece of bogosity + used in push_word and a few other places; REGISTER_RAW_SIZE is the + real way to know how big a register is. */ + +#define REGISTER_SIZE 4 + +/* Number of machine registers */ + +/* Note: I make a fake copy of the pc in register 25 (calling it ps) so + that I can clear the status bits from pc (register 15) */ + +#define NUM_REGS 26 + +/* An array of names of registers. */ + +extern char **arm_register_names; +#define REGISTER_NAME(i) arm_register_names[i] + +/* Register numbers of various important registers. + Note that some of these values are "real" register numbers, + and correspond to the general registers of the machine, + and some are "phony" register numbers which are too large + to be actual register numbers as far as the user is concerned + but do serve to get the desired values when passed to read_register. */ + +#define A1_REGNUM 0 /* first integer-like argument */ +#define A4_REGNUM 3 /* last integer-like argument */ +#define AP_REGNUM 11 +#define FP_REGNUM 11 /* Contains address of executing stack frame */ +#define SP_REGNUM 13 /* Contains address of top of stack */ +#define LR_REGNUM 14 /* address to return to from a function call */ +#define PC_REGNUM 15 /* Contains program counter */ +#define F0_REGNUM 16 /* first floating point register */ +#define F3_REGNUM 19 /* last floating point argument register */ +#define F7_REGNUM 23 /* last floating point register */ +#define FPS_REGNUM 24 /* floating point status register */ +#define PS_REGNUM 25 /* Contains processor status */ + +#define THUMB_FP_REGNUM 7 /* R7 is frame register on Thumb */ + +#define ARM_NUM_ARG_REGS 4 +#define ARM_LAST_ARG_REGNUM A4_REGNUM +#define ARM_NUM_FP_ARG_REGS 4 +#define ARM_LAST_FP_ARG_REGNUM F3_REGNUM + +/* Instruction condition field values. */ +#define INST_EQ 0x0 +#define INST_NE 0x1 +#define INST_CS 0x2 +#define INST_CC 0x3 +#define INST_MI 0x4 +#define INST_PL 0x5 +#define INST_VS 0x6 +#define INST_VC 0x7 +#define INST_HI 0x8 +#define INST_LS 0x9 +#define INST_GE 0xa +#define INST_LT 0xb +#define INST_GT 0xc +#define INST_LE 0xd +#define INST_AL 0xe +#define INST_NV 0xf + +#define FLAG_N 0x80000000 +#define FLAG_Z 0x40000000 +#define FLAG_C 0x20000000 +#define FLAG_V 0x10000000 + + + +/* Total amount of space needed to store our copies of the machine's + register state, the array `registers'. */ +#define REGISTER_BYTES (16*4 + 12*8 + 4 + 4) + +/* Index within `registers' of the first byte of the space for + register N. */ + +#define REGISTER_BYTE(N) (((N) < F0_REGNUM) ? (N)*4 : \ + (((N) < PS_REGNUM) ? 16*4 + ((N) - 16)*12 : \ + 16*4 + 8*12 + ((N) - FPS_REGNUM) * 4)) + +/* Number of bytes of storage in the actual machine representation + for register N. On the vax, all regs are 4 bytes. */ + +#define REGISTER_RAW_SIZE(N) (((N) < F0_REGNUM || (N) >= FPS_REGNUM) ? 4 : 12) + +/* Number of bytes of storage in the program's representation + for register N. On the vax, all regs are 4 bytes. */ + +#define REGISTER_VIRTUAL_SIZE(N) (((N) < F0_REGNUM || (N) >= FPS_REGNUM) ? 4 : 8) + +/* Largest value REGISTER_RAW_SIZE can have. */ + +#define MAX_REGISTER_RAW_SIZE 12 + +/* Largest value REGISTER_VIRTUAL_SIZE can have. */ + +#define MAX_REGISTER_VIRTUAL_SIZE 8 + +/* Nonzero if register N requires conversion + from raw format to virtual format. */ +#define REGISTER_CONVERTIBLE(N) ((unsigned)(N) - F0_REGNUM < 8) + +/* Convert data from raw format for register REGNUM in buffer FROM + to virtual format with type TYPE in buffer TO. */ + +#define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,TYPE,FROM,TO) \ +{ \ + double val; \ + convert_from_extended ((FROM), & val); \ + store_floating ((TO), TYPE_LENGTH (TYPE), val); \ +} + +/* Convert data from virtual format with type TYPE in buffer FROM + to raw format for register REGNUM in buffer TO. */ + +#define REGISTER_CONVERT_TO_RAW(TYPE,REGNUM,FROM,TO) \ +{ \ + double val = extract_floating ((FROM), TYPE_LENGTH (TYPE)); \ + convert_to_extended (&val, (TO)); \ +} +/* Return the GDB type object for the "standard" data type + of data in register N. */ + +#define REGISTER_VIRTUAL_TYPE(N) \ + (((unsigned)(N) - F0_REGNUM) < 8 ? builtin_type_double : builtin_type_int) + +/* The system C compiler uses a similar structure return convention to gcc */ +extern use_struct_convention_fn arm_use_struct_convention; +#define USE_STRUCT_CONVENTION(gcc_p, type) arm_use_struct_convention (gcc_p, type) + +/* Store the address of the place in which to copy the structure the + subroutine will return. This is called from call_function. */ + +#define STORE_STRUCT_RETURN(ADDR, SP) \ + { write_register (0, (ADDR)); } + +/* 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) \ + convert_from_extended (REGBUF + REGISTER_BYTE (F0_REGNUM), VALBUF); \ + else \ + memcpy (VALBUF, REGBUF, 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 _buf[MAX_REGISTER_RAW_SIZE]; \ + convert_to_extended (VALBUF, _buf); \ + write_register_bytes (REGISTER_BYTE (F0_REGNUM), _buf, MAX_REGISTER_RAW_SIZE); \ + } else \ + write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE)) + +/* 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). */ + +#define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) (*(int *)(REGBUF)) + +/* Specify that for the native compiler variables for a particular + lexical context are listed after the beginning LBRAC instead of + before in the executables list of symbols. */ +#define VARIABLES_INSIDE_BLOCK(desc, gcc_p) (!(gcc_p)) + + +/* Define other aspects of the stack frame. + We keep the offsets of all saved registers, 'cause we need 'em a lot! + We also keep the current size of the stack frame, and the offset of + the frame pointer from the stack pointer (for frameless functions, and + when we're still in the prologue of a function with a frame) */ + +#define EXTRA_FRAME_INFO \ + struct frame_saved_regs fsr; \ + int framesize; \ + int frameoffset; \ + int framereg; + +extern void arm_init_extra_frame_info PARAMS ((struct frame_info *fi)); +#define INIT_EXTRA_FRAME_INFO(fromleaf, fi) arm_init_extra_frame_info (fi) + +/* Return the frame address. On ARM, it is R11; on Thumb it is R7. */ +CORE_ADDR arm_target_read_fp PARAMS ((void)); +#define TARGET_READ_FP() arm_target_read_fp () + +/* 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. + + However, if FRAME_CHAIN_VALID returns zero, + it means the given frame is the outermost one and has no caller. */ + +#define FRAME_CHAIN(thisframe) (CORE_ADDR) arm_frame_chain (thisframe) +extern CORE_ADDR arm_frame_chain PARAMS ((struct frame_info *)); + +extern int arm_frame_chain_valid PARAMS ((CORE_ADDR, struct frame_info *)); +#define FRAME_CHAIN_VALID(chain, thisframe) arm_frame_chain_valid (chain, thisframe) + +/* Define other aspects of the stack frame. */ + +/* A macro that tells us whether the function invocation represented + by FI does not have a frame on the stack associated with it. If it + does not, FRAMELESS is set to 1, else 0. */ +#define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) \ +{ \ + CORE_ADDR func_start, after_prologue; \ + func_start = (get_pc_function_start ((FI)->pc) + \ + FUNCTION_START_OFFSET); \ + after_prologue = func_start; \ + SKIP_PROLOGUE (after_prologue); \ + (FRAMELESS) = (after_prologue == func_start); \ +} + +/* Saved Pc. */ + +#define FRAME_SAVED_PC(FRAME) arm_frame_saved_pc (FRAME) +extern CORE_ADDR arm_frame_saved_pc PARAMS ((struct frame_info *)); + +#define FRAME_ARGS_ADDRESS(fi) (fi->frame) + +#define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame) + +/* Return number of args passed to a frame. + Can return -1, meaning no way to tell. */ + +#define FRAME_NUM_ARGS(numargs, fi) (numargs = -1) + +/* Return number of bytes at start of arglist that are not really args. */ + +#define FRAME_ARGS_SKIP 0 + +/* Put here the code to store, into a struct frame_saved_regs, + the addresses of the saved registers of frame described by FRAME_INFO. + This includes special registers such as pc and fp saved in special + ways in the stack frame. sp is even more special: + the address we return for it IS the sp for the next frame. */ + +struct frame_saved_regs; +struct frame_info; +void frame_find_saved_regs PARAMS((struct frame_info *fi, + struct frame_saved_regs *fsr)); + +#define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \ + arm_frame_find_saved_regs (frame_info, &(frame_saved_regs)); + + +/* Things needed for making the inferior call functions. */ + +#define PUSH_ARGUMENTS(nargs, args, sp, struct_return, struct_addr) \ + sp = arm_push_arguments ((nargs), (args), (sp), (struct_return), (struct_addr)) +extern CORE_ADDR +arm_push_arguments PARAMS ((int, struct value **, CORE_ADDR, int, CORE_ADDR)); + +/* Push an empty stack frame, to record the current PC, etc. */ + +void arm_push_dummy_frame PARAMS ((void)); + +#define PUSH_DUMMY_FRAME arm_push_dummy_frame () + +/* Discard from the stack the innermost frame, restoring all registers. */ + +void arm_pop_frame PARAMS ((void)); + +#define POP_FRAME arm_pop_frame () + +/* This sequence of words is the instructions + + mov lr,pc + mov pc,r4 + illegal + + Note this is 12 bytes. */ + +#define CALL_DUMMY {0xe1a0e00f, 0xe1a0f004, 0xE7FFDEFE} + +#define CALL_DUMMY_START_OFFSET 0 /* Start execution at beginning of dummy */ + +#define CALL_DUMMY_BREAKPOINT_OFFSET arm_call_dummy_breakpoint_offset() +extern int arm_call_dummy_breakpoint_offset PARAMS ((void)); + +/* Insert the specified number of args and function address + into a call sequence of the above form stored at DUMMYNAME. */ + +#define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p) \ + arm_fix_call_dummy (dummyname, pc, fun, nargs, args, type, gcc_p) + +void arm_fix_call_dummy PARAMS ((char *dummy, CORE_ADDR pc, CORE_ADDR fun, + int nargs, struct value **args, + struct type *type, int gcc_p)); + +CORE_ADDR arm_get_next_pc PARAMS ((CORE_ADDR)); + +/* Functions for dealing with Thumb call thunks. */ +#define IN_SOLIB_CALL_TRAMPOLINE(pc, name) arm_in_call_stub (pc, name) +#define SKIP_TRAMPOLINE_CODE(pc) arm_skip_stub (pc) +extern int arm_in_call_stub PARAMS ((CORE_ADDR pc, char *name)); +extern CORE_ADDR arm_skip_stub PARAMS ((CORE_ADDR pc)); + +/* Function to determine whether MEMADDR is in a Thumb function. */ +extern int arm_pc_is_thumb PARAMS ((bfd_vma memaddr)); + +/* Function to determine whether MEMADDR is in a call dummy called from + a Thumb function. */ +extern int arm_pc_is_thumb_dummy PARAMS ((bfd_vma memaddr)); + +/* Macros for setting and testing a bit in a minimal symbol that + marks it as Thumb function. The MSB of the minimal symbol's + "info" field is used for this purpose. This field is already + being used to store the symbol size, so the assumption is + that the symbol size cannot exceed 2^31. + + COFF_MAKE_MSYMBOL_SPECIAL + ELF_MAKE_MSYMBOL_SPECIAL tests whether the COFF or ELF symbol corresponds + to a thumb function, and sets a "special" bit in a + minimal symbol to indicate that it does + MSYMBOL_SET_SPECIAL actually sets the "special" bit + MSYMBOL_IS_SPECIAL tests the "special" bit in a minimal symbol + MSYMBOL_SIZE returns the size of the minimal symbol, i.e. + the "info" field with the "special" bit masked out +*/ + +extern int coff_sym_is_thumb(int val); +#define MSYMBOL_SET_SPECIAL(msym) \ + MSYMBOL_INFO (msym) = (char *) (((long) MSYMBOL_INFO (msym)) | 0x80000000) +#define MSYMBOL_IS_SPECIAL(msym) \ + (((long) MSYMBOL_INFO (msym) & 0x80000000) != 0) +#define MSYMBOL_SIZE(msym) \ + ((long) MSYMBOL_INFO (msym) & 0x7fffffff) + +/* Thumb symbol are of type STT_LOPROC, (synonymous with STT_ARM_TFUNC) */ +#define ELF_MAKE_MSYMBOL_SPECIAL(sym,msym) \ + { if(ELF_ST_TYPE(((elf_symbol_type *)(sym))->internal_elf_sym.st_info) == STT_LOPROC) \ + MSYMBOL_SET_SPECIAL(msym); } + +#define COFF_MAKE_MSYMBOL_SPECIAL(val,msym) \ + { if(coff_sym_is_thumb(val)) MSYMBOL_SET_SPECIAL(msym); } + +#undef IN_SIGTRAMP +#define IN_SIGTRAMP(pc, name) 0 |