Johns release

1 files changed, 415 insertions, 0 deletions

diff --git a/gdb/tm-arm.h b/gdb/tm-arm.h
new file mode 100644
index 0000000..c061399
--- /dev/null
+++ b/gdb/tm-arm.h
@@ -0,0 +1,415 @@
+/* Definitions to make GDB target for an ARM under RISCiX (4.3bsd).
+   Copyright (C) 1986, 1987, 1989 Free Software Foundation, Inc.
+
+This file is part of GDB.
+
+GDB 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 1, or (at your option)
+any later version.
+
+GDB 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 GDB; see the file COPYING.  If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+#define TARGET_BYTE_ORDER LITTLE_ENDIAN
+
+/* IEEE format floating point */
+
+#define IEEE_FLOAT
+
+/* I provide my own xfer_core_file to cope with shared libraries */
+
+#define XFER_CORE_FILE
+
+/* 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
+
+/* Debugger information will be in DBX format.  */
+
+#define READ_DBX_FORMAT
+
+/* 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.  */
+
+#define SKIP_PROLOGUE(pc) pc = 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) (read_register (LR_REGNUM) & 0x03fffffc)
+
+/* 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 <
+
+/* Sequence of bytes for breakpoint instruction.  */
+
+#define BREAKPOINT {0x00,0x00,0x18,0xef} /* BKPT_SWI from <sys/ptrace.h> */
+
+/* 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
+
+/* Nonzero if instruction at PC is a return instruction.  */
+
+#define ABOUT_TO_RETURN(pc) \
+      ((read_memory_integer(pc, 4) & 0x0fffffff == 0x01b0f00e) || \
+       (read_memory_integer(pc, 4) & 0x0ffff800 == 0x09eba800))
+
+/* Return 1 if P points to an invalid floating point value.
+   LEN is the length in bytes.  */
+
+#define INVALID_FLOAT(p, len) 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.  */
+
+#define REGISTER_TYPE long
+
+/* 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
+
+/* Initializer for an array of names of registers.
+   There should be NUM_REGS strings in this initializer.  */
+
+#define REGISTER_NAMES \
+      { "a1", "a2", "a3", "a4",					\
+	"v1", "v2", "v3", "v4", "v5", "v6",			\
+        "sl", "fp", "ip", "sp", "lr", "pc",			\
+        "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", "fps", "ps" }
+
+/* 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 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 FPS_REGNUM 24		/* floating point status register */
+#define PS_REGNUM 25		/* Contains processor status */
+
+
+/* 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
+   to virtual format for register REGNUM.  */
+
+#define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,FROM,TO)	\
+  if (REGISTER_CONVERTIBLE(REGNUM))					\
+      convert_from_extended((FROM), (TO));				\
+  else									\
+      bcopy ((FROM), (TO), 4);
+
+/* Convert data from virtual format for register REGNUM
+   to raw format for register REGNUM.  */
+
+#define REGISTER_CONVERT_TO_RAW(REGNUM,FROM,TO)	\
+  if (REGISTER_CONVERTIBLE(REGNUM)) 			\
+    convert_to_extended((FROM), (TO)); 		\
+  else							\
+    bcopy ((FROM), (TO), 4);
+
+/* 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 */
+
+#define USE_STRUCT_CONVENTION(gcc_p, type) (TYPE_LENGTH (type) > 4)
+
+/* 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									\
+    bcopy (REGBUF, VALBUF, 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))
+
+
+/* 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.  */
+
+/* In the case of the ARM, the frame's nominal address is the FP value,
+   and 12 bytes before comes the saved previous FP value as a 4-byte word.  */
+
+#define FRAME_CHAIN(thisframe)  \
+  ((thisframe)->pc >= first_object_file_end ? \
+   read_memory_integer ((thisframe)->frame - 12, 4) :\
+   0)
+
+#define FRAME_CHAIN_VALID(chain, thisframe) \
+  (chain != 0 && (FRAME_SAVED_PC (thisframe) >= first_object_file_end))
+
+#define FRAME_CHAIN_COMBINE(chain, thisframe) (chain)
+
+/* 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) \
+  (read_memory_integer ((FRAME)->frame - 4, 4) & 0x03fffffc)
+
+#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.  */
+
+#define FRAME_FIND_SAVED_REGS(frame_info, frame_saved_regs) \
+{							      			\
+    register int regnum;							\
+    register int frame;								\
+    register int next_addr;							\
+    register int return_data_save;						\
+    register int saved_register_mask;						\
+    bzero (&frame_saved_regs, sizeof frame_saved_regs);				\
+    frame = (frame_info)->frame;						\
+    return_data_save = read_memory_integer(frame, 4) & 0x03fffffc - 12;		\
+    saved_register_mask =							\
+	read_memory_integer(return_data_save, 4);				\
+    next_addr = frame - 12;							\
+    for (regnum = 4; regnum < 10; regnum++)					\
+	if (saved_register_mask & (1<<regnum)) {				\
+	    next_addr -= 4;							\
+	    (frame_saved_regs).regs[regnum] = next_addr;			\
+	}									\
+    if (read_memory_integer(return_data_save + 4, 4) == 0xed6d7103) {		\
+	next_addr -= 12;							\
+	(frame_saved_regs).regs[F0_REGNUM + 7] = next_addr;			\
+    }										\
+    if (read_memory_integer(return_data_save + 8, 4) == 0xed6d6103) {		\
+	next_addr -= 12;							\
+	(frame_saved_regs).regs[F0_REGNUM + 6] = next_addr;			\
+    }										\
+    if (read_memory_integer(return_data_save + 12, 4) == 0xed6d5103) {		\
+	next_addr -= 12;							\
+	(frame_saved_regs).regs[F0_REGNUM + 5] = next_addr;			\
+    }										\
+    if (read_memory_integer(return_data_save + 16, 4) == 0xed6d4103) {		\
+	next_addr -= 12;							\
+	(frame_saved_regs).regs[F0_REGNUM + 4] = next_addr;			\
+    }										\
+    (frame_saved_regs).regs[SP_REGNUM] = next_addr;				\
+    (frame_saved_regs).regs[PC_REGNUM] = frame - 4;				\
+    (frame_saved_regs).regs[PS_REGNUM] = frame - 4;				\
+    (frame_saved_regs).regs[FP_REGNUM] = frame - 12;				\
+}
+
+/* Things needed for making the inferior call functions.  */
+
+/* Push an empty stack frame, to record the current PC, etc.  */
+
+#define PUSH_DUMMY_FRAME \
+{								\
+    register CORE_ADDR sp = read_register (SP_REGNUM);		\
+    register int regnum;					\
+    /* opcode for ldmdb fp,{v1-v6,fp,ip,lr,pc}^ */		\
+    sp = push_word(sp, 0xe92dbf0); /* dummy return_data_save ins */ \
+    /* push a pointer to the dummy instruction minus 12 */	\
+    sp = push_word(sp, read_register (SP_REGNUM) - 16);		\
+    sp = push_word(sp, read_register (PS_REGNUM));		\
+    sp = push_word(sp, read_register (SP_REGNUM));		\
+    sp = push_word(sp, read_register (FP_REGNUM));		\
+    for (regnum = 9; regnum >= 4; regnum --)			\
+	sp = push_word(sp, read_register (regnum));		\
+    write_register (FP_REGNUM, read_register (SP_REGNUM) - 8);	\
+    write_register (SP_REGNUM, sp); }
+
+/* Discard from the stack the innermost frame, restoring all registers.  */
+
+#define POP_FRAME \
+{									\
+    register CORE_ADDR fp = read_register (FP_REGNUM);			\
+    register unsigned long return_data_save =				\
+	read_memory_integer ( (read_memory_integer (fp, 4) &		\
+			       0x03fffffc)  - 12, 4);			\
+    register int regnum;						\
+    write_register (PS_REGNUM, read_memory_integer (fp - 4, 4));	\
+    write_register (PC_REGNUM, read_register (PS_REGNUM) & 0x03fffffc);	\
+    write_register (SP_REGNUM, read_memory_integer (fp - 8, 4));	\
+    write_register (FP_REGNUM, read_memory_integer (fp - 12, 4));	\
+    fp -= 12;								\
+    for (regnum = 9; regnum >= 4; regnum--)				\
+	if (return_data_save & (1<<regnum)) {				\
+	    fp -= 4;							\
+	    write_register (regnum, read_memory_integer(fp, 4));	\
+	}								\
+    flush_cached_frames ();						\
+    set_current_frame (create_new_frame (read_register (FP_REGNUM),	\
+					 read_pc ()));			\
+}
+
+/* This sequence of words is the instructions
+
+     ldmia	sp!,{a1-a4}
+     mov 	lk,pc
+     bl		*+8
+     swi	bkpt_swi
+
+   Note this is 16 bytes.  */
+
+#define CALL_DUMMY {0xe8bd000f, 0xe1a0e00f, 0xeb000000, 0xef180000}
+
+#define CALL_DUMMY_START_OFFSET 0  /* Start execution at beginning of dummy */
+
+/* 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) \
+{										\
+    register enum type_code code = TYPE_CODE (type);				\
+    register nargs_in_registers, struct_return = 0;				\
+    /* fix the load-arguments mask to move the first 4 or less arguments	\
+       into a1-a4 but make sure the structure return address in a1 is		\
+       not disturbed if the function is returning a structure */		\
+    if ((code == TYPE_CODE_STRUCT ||						\
+	 code == TYPE_CODE_UNION ||						\
+	 code == TYPE_CODE_ARRAY) &&						\
+	TYPE_LENGTH (type) > 4) {						\
+	nargs_in_registers = min(nargs + 1, 4);					\
+	struct_return = 1;							\
+    } else									\
+	nargs_in_registers = min(nargs, 4);					\
+    *(char *) dummyname = (1 << nargs_in_registers) - 1 - struct_return;	\
+    *(int *)((char *) dummyname + 8) =						\
+	(((fun - (pc + 16)) / 4) & 0x00ffffff) | 0xeb000000; }