--- /dev/null
+/* Target-specific definition for the Mitsubishi D30V
+ Copyright (C) 1997 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. */
+
+#ifndef TM_D30V_H
+#define TM_D30V_H
+
+/* Define the bit, byte, and word ordering of the machine. */
+
+#define TARGET_BYTE_ORDER BIG_ENDIAN
+
+/* Offset from address of function to start of its code.
+ Zero on most machines. */
+
+#define FUNCTION_START_OFFSET 0
+
+/* these are the addresses the D30V-EVA board maps data */
+/* and instruction memory to. */
+
+#define DMEM_START 0x2000000
+#define IMEM_START 0x1000000
+#define STACK_START 0x2007ffe
+
+#ifdef __STDC__ /* Forward decls for prototypes */
+struct frame_info;
+struct frame_saved_regs;
+struct type;
+struct value;
+#endif
+
+/* Advance PC across any function entry prologue instructions
+ to reach some "real" code. */
+
+extern CORE_ADDR d30v_skip_prologue ();
+#define SKIP_PROLOGUE(ip) \
+ {(ip) = d30v_skip_prologue(ip);}
+
+
+/* Stack grows downward. */
+#define INNER_THAN <
+
+/* for a breakpoint, use "dbt || nop" */
+#define BREAKPOINT {0x00, 0xb0, 0x00, 0x00,\
+ 0x00, 0xf0, 0x00, 0x00}
+
+/* If your kernel resets the pc after the trap happens you may need to
+ define this before including this file. */
+#define DECR_PC_AFTER_BREAK 0
+
+#define REGISTER_NAMES \
+{ "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
+ "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", \
+ "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", \
+ "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", \
+ "r32", "r33", "r34", "r35", "r36", "r37", "r38", "r39", \
+ "r40", "r41", "r42", "r43", "r44", "r45", "r46", "r47", \
+ "r48", "r49", "r50", "r51", "r52", "r53", "r54", "r55", \
+ "r56", "r57", "r58", "r59", "r60", "r61", "r62", "r63", \
+ "spi", "spu", \
+ "psw", "bpsw", "pc", "bpc", "dpsw", "dpc", "cr6", "rpt_c", \
+ "rpt_s", "rpt_e", "mod_s", "mod_e", "cr12", "cr13", "iba", "eit_vb",\
+ "int_s", "int_m", "a0", "a1" \
+ }
+
+#define NUM_REGS 86
+
+/* 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 R0_REGNUM 0
+#define FP_REGNUM 11
+#define LR_REGNUM 62
+#define SP_REGNUM 63
+#define SPI_REGNUM 64 /* Interrupt stack pointer */
+#define SPU_REGNUM 65 /* User stack pointer */
+#define CREGS_START 66
+
+#define PSW_REGNUM (CREGS_START + 0) /* psw, bpsw, or dpsw??? */
+#define PSW_SM 0x80000000 /* Stack mode: 0 == interrupt (SPI),
+ 1 == user (SPU) */
+#define BPSW_REGNUM (CREGS_START + 1) /* Backup PSW (on interrupt) */
+#define PC_REGNUM (CREGS_START + 2) /* pc, bpc, or dpc??? */
+#define BPC_REGNUM (CREGS_START + 3) /* Backup PC (on interrupt) */
+#define DPSW_REGNUM (CREGS_START + 4) /* Backup PSW (on debug trap) */
+#define DPC_REGNUM (CREGS_START + 5) /* Backup PC (on debug trap) */
+#define RPT_C_REGNUM (CREGS_START + 7) /* Loop count */
+#define RPT_S_REGNUM (CREGS_START + 8) /* Loop start address*/
+#define RPT_E_REGNUM (CREGS_START + 9) /* Loop end address */
+#define MOD_S_REGNUM (CREGS_START + 10)
+#define MOD_E_REGNUM (CREGS_START + 11)
+#define IBA_REGNUM (CREGS_START + 14) /* Instruction break address */
+#define EIT_VB_REGNUM (CREGS_START + 15) /* Vector base address */
+#define INT_S_REGNUM (CREGS_START + 16) /* Interrupt status */
+#define INT_M_REGNUM (CREGS_START + 17) /* Interrupt mask */
+#define A0_REGNUM 84
+#define A1_REGNUM 85
+
+/* Say how much memory is needed to store a copy of the register set */
+#define REGISTER_BYTES ((NUM_REGS - 2) * 4 + 2 * 8)
+
+/* Index within `registers' of the first byte of the space for
+ register N. */
+
+#define REGISTER_BYTE(N) \
+( ((N) >= A0_REGNUM) ? ( ((N) - A0_REGNUM) * 8 + A0_REGNUM * 4 ) : ((N) * 4) )
+
+/* Number of bytes of storage in the actual machine representation
+ for register N. */
+
+#define REGISTER_RAW_SIZE(N) ( ((N) >= A0_REGNUM) ? 8 : 4 )
+
+/* Number of bytes of storage in the program's representation
+ for register N. */
+#define REGISTER_VIRTUAL_SIZE(N) REGISTER_RAW_SIZE(N)
+
+/* Largest value REGISTER_RAW_SIZE can have. */
+
+#define MAX_REGISTER_RAW_SIZE 8
+
+/* Largest value REGISTER_VIRTUAL_SIZE can have. */
+
+#define MAX_REGISTER_VIRTUAL_SIZE 8
+
+/* Return the GDB type object for the "standard" data type
+ of data in register N. */
+
+#define REGISTER_VIRTUAL_TYPE(N) \
+( ((N) < A0_REGNUM ) ? builtin_type_long : builtin_type_long_long)
+
+/* Writing to r0 is a noop (not an error or exception or anything like
+ that, however). */
+
+#define CANNOT_STORE_REGISTER(regno) ((regno) == R0_REGNUM)
+
+void d30v_do_registers_info PARAMS ((int regnum, int fpregs));
+
+#define DO_REGISTERS_INFO d30v_do_registers_info
+
+/* Store the address of the place in which to copy the structure the
+ subroutine will return. This is called from call_function.
+
+ We store structs through a pointer passed in R2 */
+
+#define STORE_STRUCT_RETURN(ADDR, SP) \
+ { write_register (2, (ADDR)); }
+
+
+/* Write into appropriate registers a function return value
+ of type TYPE, given in virtual format.
+
+ Things always get returned in R2/R3 */
+
+#define STORE_RETURN_VALUE(TYPE,VALBUF) \
+ write_register_bytes (REGISTER_BYTE(2), 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) (*(CORE_ADDR *)(REGBUF))
+\f
+
+/* Define other aspects of the stack frame.
+ we keep a copy of the worked out return pc lying around, since it
+ is a useful bit of info */
+
+#define EXTRA_FRAME_INFO \
+ CORE_ADDR return_pc; \
+ CORE_ADDR dummy; \
+ int frameless; \
+ int size;
+
+#define INIT_EXTRA_FRAME_INFO(fromleaf, fi) \
+ d30v_init_extra_frame_info(fromleaf, fi)
+
+extern void d30v_init_extra_frame_info PARAMS (( int fromleaf, struct frame_info *fi ));
+
+/* 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) \
+ (FRAMELESS) = frameless_look_for_prologue(FI)
+
+#define FRAME_CHAIN(FRAME) d30v_frame_chain(FRAME)
+#define FRAME_CHAIN_VALID(chain,frame) \
+ ((chain) != 0 && (frame) != 0 && (frame)->pc > IMEM_START)
+#define FRAME_SAVED_PC(FRAME) ((FRAME)->return_pc)
+#define FRAME_ARGS_ADDRESS(fi) (fi)->frame
+#define FRAME_LOCALS_ADDRESS(fi) (fi)->frame
+
+/* Immediately after a function call, return the saved pc. We can't */
+/* use frame->return_pc beause that is determined by reading R13 off the */
+/*stack and that may not be written yet. */
+
+#define SAVED_PC_AFTER_CALL(frame) ((read_register(LR_REGNUM) << 2) | IMEM_START)
+
+/* Set VAL to the number of args passed to frame described by FI.
+ Can set VAL to -1, meaning no way to tell. */
+/* We can't tell how many args there are */
+
+#define FRAME_NUM_ARGS(val,fi) (val = -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) \
+ d30v_frame_find_saved_regs(frame_info, &(frame_saved_regs))
+
+extern void d30v_frame_find_saved_regs PARAMS ((struct frame_info *, struct frame_saved_regs *));
+
+#define NAMES_HAVE_UNDERSCORE
+
+/*
+DUMMY FRAMES. Need these to support inferior function calls. They work
+like this on D30V: First we set a breakpoint at 0 or __start. Then we push
+all the registers onto the stack. Then put the function arguments in the proper
+registers and set r13 to our breakpoint address. Finally call the function directly.
+When it hits the breakpoint, clear the break point and pop the old register contents
+off the stack.
+*/
+
+#define CALL_DUMMY { }
+#define PUSH_DUMMY_FRAME
+#define CALL_DUMMY_START_OFFSET 0
+#define CALL_DUMMY_LOCATION AT_ENTRY_POINT
+#define CALL_DUMMY_BREAKPOINT_OFFSET (0)
+
+extern CORE_ADDR d30v_call_dummy_address PARAMS ((void));
+#define CALL_DUMMY_ADDRESS() d30v_call_dummy_address()
+
+#define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p) \
+sp = d30v_fix_call_dummy (dummyname, pc, fun, nargs, args, type, gcc_p)
+
+#define PC_IN_CALL_DUMMY(pc, sp, frame_address) ( pc == IMEM_START + 4 )
+
+extern CORE_ADDR d30v_fix_call_dummy PARAMS ((char *, CORE_ADDR, CORE_ADDR,
+ int, struct value **,
+ struct type *, int));
+#define PUSH_ARGUMENTS(nargs, args, sp, struct_return, struct_addr) \
+ sp = d30v_push_arguments((nargs), (args), (sp), (struct_return), (struct_addr))
+extern CORE_ADDR d30v_push_arguments PARAMS ((int, struct value **, CORE_ADDR, int, CORE_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) \
+d30v_extract_return_value(TYPE, REGBUF, VALBUF)
+ extern void
+d30v_extract_return_value PARAMS ((struct type *, char *, char *));
+
+
+/* Discard from the stack the innermost frame,
+ restoring all saved registers. */
+#define POP_FRAME d30v_pop_frame();
+extern void d30v_pop_frame PARAMS((void));
+
+#define REGISTER_SIZE 4
+
+/* Need to handle SP special, as we need to select between spu and spi. */
+
+#define TARGET_READ_SP() ((read_register (PSW_REGNUM) & PSW_SM) \
+ ? read_register (SPU_REGNUM) \
+ : read_register (SPI_REGNUM))
+
+#define TARGET_WRITE_SP(val) ((read_register (PSW_REGNUM) & PSW_SM) \
+ ? write_register (SPU_REGNUM, (val)) \
+ : write_register (SPI_REGNUM, (val)))
+
+/* Turn this on to cause remote-sim.c to use sim_set/clear_breakpoint. */
+
+#define SIM_HAS_BREAKPOINTS
+
+#endif /* TM_D30V_H */
--- /dev/null
+/* Target-dependent code for Mitsubishi D30V, for GDB.
+ Copyright (C) 1996, 1997 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. */
+
+/* Contributed by Martin Hunt, hunt@cygnus.com */
+
+#include "defs.h"
+#include "frame.h"
+#include "obstack.h"
+#include "symtab.h"
+#include "gdbtypes.h"
+#include "gdbcmd.h"
+#include "gdbcore.h"
+#include "gdb_string.h"
+#include "value.h"
+#include "inferior.h"
+#include "dis-asm.h"
+#include "symfile.h"
+#include "objfiles.h"
+
+void d30v_frame_find_saved_regs PARAMS ((struct frame_info *fi,
+ struct frame_saved_regs *fsr));
+static void d30v_pop_dummy_frame PARAMS ((struct frame_info *fi));
+
+/* Discard from the stack the innermost frame, restoring all saved
+ registers. */
+
+void
+d30v_pop_frame ()
+{
+ struct frame_info *frame = get_current_frame ();
+ CORE_ADDR fp;
+ int regnum;
+ struct frame_saved_regs fsr;
+ char raw_buffer[8];
+
+ fp = FRAME_FP (frame);
+ if (frame->dummy)
+ {
+ d30v_pop_dummy_frame(frame);
+ return;
+ }
+
+ /* fill out fsr with the address of where each */
+ /* register was stored in the frame */
+ get_frame_saved_regs (frame, &fsr);
+
+ /* now update the current registers with the old values */
+ for (regnum = A0_REGNUM; regnum < A0_REGNUM+2 ; regnum++)
+ {
+ if (fsr.regs[regnum])
+ {
+ read_memory (fsr.regs[regnum], raw_buffer, 8);
+ write_register_bytes (REGISTER_BYTE (regnum), raw_buffer, 8);
+ }
+ }
+ for (regnum = 0; regnum < SP_REGNUM; regnum++)
+ {
+ if (fsr.regs[regnum])
+ {
+ write_register (regnum, read_memory_unsigned_integer (fsr.regs[regnum], 2));
+ }
+ }
+ if (fsr.regs[PSW_REGNUM])
+ {
+ write_register (PSW_REGNUM, read_memory_unsigned_integer (fsr.regs[PSW_REGNUM], 2));
+ }
+
+ write_register (PC_REGNUM, read_register(13));
+ write_register (SP_REGNUM, fp + frame->size);
+ target_store_registers (-1);
+ flush_cached_frames ();
+}
+
+static int
+check_prologue (op)
+ unsigned short op;
+{
+ /* st rn, @-sp */
+ if ((op & 0x7E1F) == 0x6C1F)
+ return 1;
+
+ /* st2w rn, @-sp */
+ if ((op & 0x7E3F) == 0x6E1F)
+ return 1;
+
+ /* subi sp, n */
+ if ((op & 0x7FE1) == 0x01E1)
+ return 1;
+
+ /* mv r11, sp */
+ if (op == 0x417E)
+ return 1;
+
+ /* nop */
+ if (op == 0x5E00)
+ return 1;
+
+ /* st rn, @sp */
+ if ((op & 0x7E1F) == 0x681E)
+ return 1;
+
+ /* st2w rn, @sp */
+ if ((op & 0x7E3F) == 0x3A1E)
+ return 1;
+
+ return 0;
+}
+
+CORE_ADDR
+d30v_skip_prologue (pc)
+ CORE_ADDR pc;
+{
+ unsigned long op;
+ unsigned short op1, op2;
+ CORE_ADDR func_addr, func_end;
+ struct symtab_and_line sal;
+
+ /* If we have line debugging information, then the end of the */
+ /* prologue should the first assembly instruction of the first source line */
+ if (find_pc_partial_function (pc, NULL, &func_addr, &func_end))
+ {
+ sal = find_pc_line (func_addr, 0);
+ if ( sal.end && sal.end < func_end)
+ return sal.end;
+ }
+
+ if (target_read_memory (pc, (char *)&op, 4))
+ return pc; /* Can't access it -- assume no prologue. */
+
+ while (1)
+ {
+ op = (unsigned long)read_memory_integer (pc, 4);
+ if ((op & 0xC0000000) == 0xC0000000)
+ {
+ /* long instruction */
+ if ( ((op & 0x3FFF0000) != 0x01FF0000) && /* add3 sp,sp,n */
+ ((op & 0x3F0F0000) != 0x340F0000) && /* st rn, @(offset,sp) */
+ ((op & 0x3F1F0000) != 0x350F0000)) /* st2w rn, @(offset,sp) */
+ break;
+ }
+ else
+ {
+ /* short instructions */
+ if ((op & 0xC0000000) == 0x80000000)
+ {
+ op2 = (op & 0x3FFF8000) >> 15;
+ op1 = op & 0x7FFF;
+ }
+ else
+ {
+ op1 = (op & 0x3FFF8000) >> 15;
+ op2 = op & 0x7FFF;
+ }
+ if (check_prologue(op1))
+ {
+ if (!check_prologue(op2))
+ {
+ /* if the previous opcode was really part of the prologue */
+ /* and not just a NOP, then we want to break after both instructions */
+ if (op1 != 0x5E00)
+ pc += 4;
+ break;
+ }
+ }
+ else
+ break;
+ }
+ pc += 4;
+ }
+ return pc;
+}
+
+/* Given a GDB frame, determine the address of the calling function's frame.
+ This will be used to create a new GDB frame struct, and then
+ INIT_EXTRA_FRAME_INFO and INIT_FRAME_PC will be called for the new frame.
+*/
+
+CORE_ADDR
+d30v_frame_chain (frame)
+ struct frame_info *frame;
+{
+ struct frame_saved_regs fsr;
+
+ d30v_frame_find_saved_regs (frame, &fsr);
+
+ if (frame->return_pc == IMEM_START)
+ return (CORE_ADDR)0;
+
+ if (!fsr.regs[FP_REGNUM])
+ {
+ if (!fsr.regs[SP_REGNUM] || fsr.regs[SP_REGNUM] == STACK_START)
+ return (CORE_ADDR)0;
+
+ return fsr.regs[SP_REGNUM];
+ }
+
+ if (!read_memory_unsigned_integer(fsr.regs[FP_REGNUM],2))
+ return (CORE_ADDR)0;
+
+ return read_memory_unsigned_integer(fsr.regs[FP_REGNUM],2)| DMEM_START;
+}
+
+static int next_addr, uses_frame;
+
+static int
+prologue_find_regs (op, fsr, addr)
+ unsigned short op;
+ struct frame_saved_regs *fsr;
+ CORE_ADDR addr;
+{
+ int n;
+
+ /* st rn, @-sp */
+ if ((op & 0x7E1F) == 0x6C1F)
+ {
+ n = (op & 0x1E0) >> 5;
+ next_addr -= 2;
+ fsr->regs[n] = next_addr;
+ return 1;
+ }
+
+ /* st2w rn, @-sp */
+ else if ((op & 0x7E3F) == 0x6E1F)
+ {
+ n = (op & 0x1E0) >> 5;
+ next_addr -= 4;
+ fsr->regs[n] = next_addr;
+ fsr->regs[n+1] = next_addr+2;
+ return 1;
+ }
+
+ /* subi sp, n */
+ if ((op & 0x7FE1) == 0x01E1)
+ {
+ n = (op & 0x1E) >> 1;
+ if (n == 0)
+ n = 16;
+ next_addr -= n;
+ return 1;
+ }
+
+ /* mv r11, sp */
+ if (op == 0x417E)
+ {
+ uses_frame = 1;
+ return 1;
+ }
+
+ /* nop */
+ if (op == 0x5E00)
+ return 1;
+
+ /* st rn, @sp */
+ if ((op & 0x7E1F) == 0x681E)
+ {
+ n = (op & 0x1E0) >> 5;
+ fsr->regs[n] = next_addr;
+ return 1;
+ }
+
+ /* st2w rn, @sp */
+ if ((op & 0x7E3F) == 0x3A1E)
+ {
+ n = (op & 0x1E0) >> 5;
+ fsr->regs[n] = next_addr;
+ fsr->regs[n+1] = next_addr+2;
+ return 1;
+ }
+
+ return 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. */
+void
+d30v_frame_find_saved_regs (fi, fsr)
+ struct frame_info *fi;
+ struct frame_saved_regs *fsr;
+{
+ CORE_ADDR fp, pc;
+ unsigned long op;
+ unsigned short op1, op2;
+ int i;
+
+ fp = fi->frame;
+ memset (fsr, 0, sizeof (*fsr));
+ next_addr = 0;
+
+ pc = get_pc_function_start (fi->pc);
+
+ uses_frame = 0;
+ while (1)
+ {
+ op = (unsigned long)read_memory_integer (pc, 4);
+ if ((op & 0xC0000000) == 0xC0000000)
+ {
+ /* long instruction */
+ if ((op & 0x3FFF0000) == 0x01FF0000)
+ {
+ /* add3 sp,sp,n */
+ short n = op & 0xFFFF;
+ next_addr += n;
+ }
+ else if ((op & 0x3F0F0000) == 0x340F0000)
+ {
+ /* st rn, @(offset,sp) */
+ short offset = op & 0xFFFF;
+ short n = (op >> 20) & 0xF;
+ fsr->regs[n] = next_addr + offset;
+ }
+ else if ((op & 0x3F1F0000) == 0x350F0000)
+ {
+ /* st2w rn, @(offset,sp) */
+ short offset = op & 0xFFFF;
+ short n = (op >> 20) & 0xF;
+ fsr->regs[n] = next_addr + offset;
+ fsr->regs[n+1] = next_addr + offset + 2;
+ }
+ else
+ break;
+ }
+ else
+ {
+ /* short instructions */
+ if ((op & 0xC0000000) == 0x80000000)
+ {
+ op2 = (op & 0x3FFF8000) >> 15;
+ op1 = op & 0x7FFF;
+ }
+ else
+ {
+ op1 = (op & 0x3FFF8000) >> 15;
+ op2 = op & 0x7FFF;
+ }
+ if (!prologue_find_regs(op1,fsr,pc) || !prologue_find_regs(op2,fsr,pc))
+ break;
+ }
+ pc += 4;
+ }
+
+ fi->size = -next_addr;
+
+ if (!(fp & 0xffff))
+ fp = read_register(SP_REGNUM) | DMEM_START;
+
+ for (i=0; i<NUM_REGS-1; i++)
+ if (fsr->regs[i])
+ {
+ fsr->regs[i] = fp - (next_addr - fsr->regs[i]);
+ }
+
+ if (fsr->regs[LR_REGNUM])
+ fi->return_pc = ((read_memory_unsigned_integer(fsr->regs[LR_REGNUM],2) - 1) << 2) | IMEM_START;
+ else
+ fi->return_pc = ((read_register(LR_REGNUM) - 1) << 2) | IMEM_START;
+
+ /* th SP is not normally (ever?) saved, but check anyway */
+ if (!fsr->regs[SP_REGNUM])
+ {
+ /* if the FP was saved, that means the current FP is valid, */
+ /* otherwise, it isn't being used, so we use the SP instead */
+ if (uses_frame)
+ fsr->regs[SP_REGNUM] = read_register(FP_REGNUM) + fi->size;
+ else
+ {
+ fsr->regs[SP_REGNUM] = fp + fi->size;
+ fi->frameless = 1;
+ fsr->regs[FP_REGNUM] = 0;
+ }
+ }
+}
+
+void
+d30v_init_extra_frame_info (fromleaf, fi)
+ int fromleaf;
+ struct frame_info *fi;
+{
+ struct frame_saved_regs dummy;
+
+ if (fi->next && ((fi->pc & 0xffff) == 0))
+ fi->pc = fi->next->return_pc;
+
+ d30v_frame_find_saved_regs (fi, &dummy);
+}
+
+static void d30v_print_register PARAMS ((int regnum, int tabular));
+
+static void
+d30v_print_register (regnum, tabular)
+ int regnum;
+ int tabular;
+{
+ if (regnum < A0_REGNUM)
+ {
+ if (tabular)
+ printf_filtered ("%08x", read_register (regnum));
+ else
+ printf_filtered ("0x%x %d", read_register (regnum),
+ read_register (regnum));
+ }
+ else
+ {
+ char regbuf[MAX_REGISTER_RAW_SIZE];
+
+ read_relative_register_raw_bytes (regnum, regbuf);
+
+ val_print (REGISTER_VIRTUAL_TYPE (regnum), regbuf, 0,
+ gdb_stdout, 'x', 1, 0, Val_pretty_default);
+
+ if (!tabular)
+ {
+ printf_filtered (" ");
+ val_print (REGISTER_VIRTUAL_TYPE (regnum), regbuf, 0,
+ gdb_stdout, 'd', 1, 0, Val_pretty_default);
+ }
+ }
+}
+
+void
+d30v_do_registers_info (regnum, fpregs)
+ int regnum;
+ int fpregs;
+{
+ long long num1, num2;
+
+ if (regnum != -1)
+ {
+ if (reg_names[0] == NULL || reg_names[0][0] == '\000')
+ return;
+
+ printf_filtered ("%s ", reg_names[regnum]);
+ d30v_print_register (regnum, 0);
+
+ printf_filtered ("\n");
+ return;
+ }
+
+ /* Have to print all the registers. Format them nicely. */
+
+ printf_filtered ("PC=");
+ print_address (read_pc (), gdb_stdout);
+
+ printf_filtered (" PSW=");
+ d30v_print_register (PSW_REGNUM, 1);
+
+ printf_filtered (" BPC=");
+ print_address (read_register (BPC_REGNUM), gdb_stdout);
+
+ printf_filtered (" BPSW=");
+ d30v_print_register (BPSW_REGNUM, 1);
+ printf_filtered ("\n");
+
+ printf_filtered ("DPC=");
+ print_address (read_register (DPC_REGNUM), gdb_stdout);
+
+ printf_filtered (" DPSW=");
+ d30v_print_register (DPSW_REGNUM, 1);
+
+ printf_filtered (" IBA=");
+ print_address (read_register (IBA_REGNUM), gdb_stdout);
+ printf_filtered ("\n");
+
+ printf_filtered ("RPT_C=");
+ d30v_print_register (RPT_C_REGNUM, 1);
+
+ printf_filtered (" RPT_S=");
+ print_address (read_register (RPT_S_REGNUM), gdb_stdout);
+
+ printf_filtered (" RPT_E=");
+ print_address (read_register (RPT_E_REGNUM), gdb_stdout);
+ printf_filtered ("\n");
+
+ printf_filtered ("MOD_S=");
+ print_address (read_register (MOD_S_REGNUM), gdb_stdout);
+
+ printf_filtered (" MOD_E=");
+ print_address (read_register (MOD_E_REGNUM), gdb_stdout);
+ printf_filtered ("\n");
+
+ printf_filtered ("EIT_VB=");
+ print_address (read_register (EIT_VB_REGNUM), gdb_stdout);
+
+ printf_filtered (" INT_S=");
+ d30v_print_register (INT_S_REGNUM, 1);
+
+ printf_filtered (" INT_M=");
+ d30v_print_register (INT_M_REGNUM, 1);
+ printf_filtered ("\n");
+
+ for (regnum = 0; regnum <= 63;)
+ {
+ int i;
+
+ printf_filtered ("R%d-R%d ", regnum, regnum + 7);
+ if (regnum < 10)
+ printf_filtered (" ");
+ if (regnum + 7 < 10)
+ printf_filtered (" ");
+
+ for (i = 0; i < 8; i++)
+ {
+ printf_filtered (" ");
+ d30v_print_register (regnum++, 1);
+ }
+
+ printf_filtered ("\n");
+ }
+
+ printf_filtered ("A0-A1 ");
+
+ d30v_print_register (A0_REGNUM, 1);
+ printf_filtered (" ");
+ d30v_print_register (A1_REGNUM, 1);
+ printf_filtered ("\n");
+}
+
+CORE_ADDR
+d30v_fix_call_dummy (dummyname, start_sp, fun, nargs, args, type, gcc_p)
+ char *dummyname;
+ CORE_ADDR start_sp;
+ CORE_ADDR fun;
+ int nargs;
+ value_ptr *args;
+ struct type *type;
+ int gcc_p;
+{
+ int regnum;
+ CORE_ADDR sp;
+ char buffer[MAX_REGISTER_RAW_SIZE];
+ struct frame_info *frame = get_current_frame ();
+ frame->dummy = start_sp;
+ start_sp |= DMEM_START;
+
+ sp = start_sp;
+ for (regnum = 0; regnum < NUM_REGS; regnum++)
+ {
+ sp -= REGISTER_RAW_SIZE(regnum);
+ store_address (buffer, REGISTER_RAW_SIZE(regnum), read_register(regnum));
+ write_memory (sp, buffer, REGISTER_RAW_SIZE(regnum));
+ }
+ write_register (SP_REGNUM, (LONGEST)(sp & 0xffff));
+ /* now we need to load LR with the return address */
+ write_register (LR_REGNUM, (LONGEST)(d30v_call_dummy_address() & 0xffff) >> 2);
+ return sp;
+}
+
+static void
+d30v_pop_dummy_frame (fi)
+ struct frame_info *fi;
+{
+ CORE_ADDR sp = fi->dummy;
+ int regnum;
+
+ for (regnum = 0; regnum < NUM_REGS; regnum++)
+ {
+ sp -= REGISTER_RAW_SIZE(regnum);
+ write_register(regnum, read_memory_unsigned_integer (sp, REGISTER_RAW_SIZE(regnum)));
+ }
+ flush_cached_frames (); /* needed? */
+}
+
+
+CORE_ADDR
+d30v_push_arguments (nargs, args, sp, struct_return, struct_addr)
+ int nargs;
+ value_ptr *args;
+ CORE_ADDR sp;
+ int struct_return;
+ CORE_ADDR struct_addr;
+{
+ int i, len, index=0, regnum=2;
+ char buffer[4], *contents;
+ LONGEST val;
+ CORE_ADDR ptrs[10];
+
+ /* Pass 1. Put all large args on stack */
+ for (i = 0; i < nargs; i++)
+ {
+ value_ptr arg = args[i];
+ struct type *arg_type = check_typedef (VALUE_TYPE (arg));
+ len = TYPE_LENGTH (arg_type);
+ contents = VALUE_CONTENTS(arg);
+ val = extract_signed_integer (contents, len);
+ if (len > 4)
+ {
+ /* put on stack and pass pointers */
+ sp -= len;
+ write_memory (sp, contents, len);
+ ptrs[index++] = sp;
+ }
+ }
+
+ index = 0;
+
+ for (i = 0; i < nargs; i++)
+ {
+ value_ptr arg = args[i];
+ struct type *arg_type = check_typedef (VALUE_TYPE (arg));
+ len = TYPE_LENGTH (arg_type);
+ contents = VALUE_CONTENTS(arg);
+ val = extract_signed_integer (contents, len);
+ if (len > 4)
+ {
+ /* use a pointer to previously saved data */
+ if (regnum < 6)
+ write_register (regnum++, ptrs[index++]);
+ else
+ {
+ /* no more registers available. put it on the stack */
+ sp -= 2;
+ store_address (buffer, 2, ptrs[index++]);
+ write_memory (sp, buffer, 2);
+ }
+ }
+ else
+ {
+ if (regnum < 6 )
+ {
+ if (len == 4)
+ write_register (regnum++, val>>16);
+ write_register (regnum++, val & 0xffff);
+ }
+ else
+ {
+ sp -= len;
+ store_address (buffer, len, val);
+ write_memory (sp, buffer, len);
+ }
+ }
+ }
+ return sp;
+}
+
+
+/* pick an out-of-the-way place to set the return value */
+/* for an inferior function call. The link register is set to this */
+/* value and a momentary breakpoint is set there. When the breakpoint */
+/* is hit, the dummy frame is popped and the previous environment is */
+/* restored. */
+
+CORE_ADDR
+d30v_call_dummy_address ()
+{
+ CORE_ADDR entry;
+ struct minimal_symbol *sym;
+
+ entry = entry_point_address ();
+
+ if (entry != 0)
+ return entry;
+
+ sym = lookup_minimal_symbol ("_start", NULL, symfile_objfile);
+
+ if (!sym || MSYMBOL_TYPE (sym) != mst_text)
+ return 0;
+ else
+ return SYMBOL_VALUE_ADDRESS (sym);
+}
+
+/* Given a return value in `regbuf' with a type `valtype',
+ extract and copy its value into `valbuf'. */
+
+void
+d30v_extract_return_value (valtype, regbuf, valbuf)
+ struct type *valtype;
+ char regbuf[REGISTER_BYTES];
+ char *valbuf;
+{
+ memcpy (valbuf, regbuf + REGISTER_BYTE (2), TYPE_LENGTH (valtype));
+}
+
+/* The following code implements access to, and display of, the D30V's
+ instruction trace buffer. The buffer consists of 64K or more
+ 4-byte words of data, of which each words includes an 8-bit count,
+ an 8-bit segment number, and a 16-bit instruction address.
+
+ In theory, the trace buffer is continuously capturing instruction
+ data that the CPU presents on its "debug bus", but in practice, the
+ ROMified GDB stub only enables tracing when it continues or steps
+ the program, and stops tracing when the program stops; so it
+ actually works for GDB to read the buffer counter out of memory and
+ then read each trace word. The counter records where the tracing
+ stops, but there is no record of where it started, so we remember
+ the PC when we resumed and then search backwards in the trace
+ buffer for a word that includes that address. This is not perfect,
+ because you will miss trace data if the resumption PC is the target
+ of a branch. (The value of the buffer counter is semi-random, any
+ trace data from a previous program stop is gone.) */
+
+/* The address of the last word recorded in the trace buffer. */
+
+#define DBBC_ADDR (0xd80000)
+
+/* The base of the trace buffer, at least for the "Board_0". */
+
+#define TRACE_BUFFER_BASE (0xf40000)
+
+static void trace_command PARAMS ((char *, int));
+
+static void untrace_command PARAMS ((char *, int));
+
+static void trace_info PARAMS ((char *, int));
+
+static void tdisassemble_command PARAMS ((char *, int));
+
+static void display_trace PARAMS ((int, int));
+
+/* True when instruction traces are being collected. */
+
+static int tracing;
+
+/* Remembered PC. */
+
+static CORE_ADDR last_pc;
+
+/* True when trace output should be displayed whenever program stops. */
+
+static int trace_display;
+
+/* True when trace listing should include source lines. */
+
+static int default_trace_show_source = 1;
+
+struct trace_buffer {
+ int size;
+ short *counts;
+ CORE_ADDR *addrs;
+} trace_data;
+
+static void
+trace_command (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ /* Clear the host-side trace buffer, allocating space if needed. */
+ trace_data.size = 0;
+ if (trace_data.counts == NULL)
+ trace_data.counts = (short *) xmalloc (65536 * sizeof(short));
+ if (trace_data.addrs == NULL)
+ trace_data.addrs = (CORE_ADDR *) xmalloc (65536 * sizeof(CORE_ADDR));
+
+ tracing = 1;
+
+ printf_filtered ("Tracing is now on.\n");
+}
+
+static void
+untrace_command (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ tracing = 0;
+
+ printf_filtered ("Tracing is now off.\n");
+}
+
+static void
+trace_info (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ int i;
+
+ if (trace_data.size)
+ {
+ printf_filtered ("%d entries in trace buffer:\n", trace_data.size);
+
+ for (i = 0; i < trace_data.size; ++i)
+ {
+ printf_filtered ("%d: %d instruction%s at 0x%x\n",
+ i, trace_data.counts[i],
+ (trace_data.counts[i] == 1 ? "" : "s"),
+ trace_data.addrs[i]);
+ }
+ }
+ else
+ printf_filtered ("No entries in trace buffer.\n");
+
+ printf_filtered ("Tracing is currently %s.\n", (tracing ? "on" : "off"));
+}
+
+/* Print the instruction at address MEMADDR in debugged memory,
+ on STREAM. Returns length of the instruction, in bytes. */
+
+static int
+print_insn (memaddr, stream)
+ CORE_ADDR memaddr;
+ GDB_FILE *stream;
+{
+ /* If there's no disassembler, something is very wrong. */
+ if (tm_print_insn == NULL)
+ abort ();
+
+ if (TARGET_BYTE_ORDER == BIG_ENDIAN)
+ tm_print_insn_info.endian = BFD_ENDIAN_BIG;
+ else
+ tm_print_insn_info.endian = BFD_ENDIAN_LITTLE;
+ return (*tm_print_insn) (memaddr, &tm_print_insn_info);
+}
+
+void
+d30v_eva_prepare_to_trace ()
+{
+ if (!tracing)
+ return;
+
+ last_pc = read_register (PC_REGNUM);
+}
+
+/* Collect trace data from the target board and format it into a form
+ more useful for display. */
+
+void
+d30v_eva_get_trace_data ()
+{
+ int count, i, j, oldsize;
+ int trace_addr, trace_seg, trace_cnt, next_cnt;
+ unsigned int last_trace, trace_word, next_word;
+ unsigned int *tmpspace;
+
+ if (!tracing)
+ return;
+
+ tmpspace = xmalloc (65536 * sizeof(unsigned int));
+
+ last_trace = read_memory_unsigned_integer (DBBC_ADDR, 2) << 2;
+
+ /* Collect buffer contents from the target, stopping when we reach
+ the word recorded when execution resumed. */
+
+ count = 0;
+ while (last_trace > 0)
+ {
+ QUIT;
+ trace_word =
+ read_memory_unsigned_integer (TRACE_BUFFER_BASE + last_trace, 4);
+ trace_addr = trace_word & 0xffff;
+ last_trace -= 4;
+ /* Ignore an apparently nonsensical entry. */
+ if (trace_addr == 0xffd5)
+ continue;
+ tmpspace[count++] = trace_word;
+ if (trace_addr == last_pc)
+ break;
+ if (count > 65535)
+ break;
+ }
+
+ /* Move the data to the host-side trace buffer, adjusting counts to
+ include the last instruction executed and transforming the address
+ into something that GDB likes. */
+
+ for (i = 0; i < count; ++i)
+ {
+ trace_word = tmpspace[i];
+ next_word = ((i == 0) ? 0 : tmpspace[i - 1]);
+ trace_addr = trace_word & 0xffff;
+ next_cnt = (next_word >> 24) & 0xff;
+ j = trace_data.size + count - i - 1;
+ trace_data.addrs[j] = (trace_addr << 2) + 0x1000000;
+ trace_data.counts[j] = next_cnt + 1;
+ }
+
+ oldsize = trace_data.size;
+ trace_data.size += count;
+
+ free (tmpspace);
+
+ if (trace_display)
+ display_trace (oldsize, trace_data.size);
+}
+
+static void
+tdisassemble_command (arg, from_tty)
+ char *arg;
+ int from_tty;
+{
+ int i, count;
+ CORE_ADDR low, high;
+ char *space_index;
+
+ if (!arg)
+ {
+ low = 0;
+ high = trace_data.size;
+ }
+ else if (!(space_index = (char *) strchr (arg, ' ')))
+ {
+ low = parse_and_eval_address (arg);
+ high = low + 5;
+ }
+ else
+ {
+ /* Two arguments. */
+ *space_index = '\0';
+ low = parse_and_eval_address (arg);
+ high = parse_and_eval_address (space_index + 1);
+ if (high < low)
+ high = low;
+ }
+
+ printf_filtered ("Dump of trace from %d to %d:\n", low, high);
+
+ display_trace (low, high);
+
+ printf_filtered ("End of trace dump.\n");
+ gdb_flush (gdb_stdout);
+}
+
+static void
+display_trace (low, high)
+ int low, high;
+{
+ int i, count, trace_show_source, first, suppress;
+ CORE_ADDR next_address;
+
+ trace_show_source = default_trace_show_source;
+ if (!have_full_symbols () && !have_partial_symbols())
+ {
+ trace_show_source = 0;
+ printf_filtered ("No symbol table is loaded. Use the \"file\" command.\n");
+ printf_filtered ("Trace will not display any source.\n");
+ }
+
+ first = 1;
+ suppress = 0;
+ for (i = low; i < high; ++i)
+ {
+ next_address = trace_data.addrs[i];
+ count = trace_data.counts[i];
+ while (count-- > 0)
+ {
+ QUIT;
+ if (trace_show_source)
+ {
+ struct symtab_and_line sal, sal_prev;
+
+ sal_prev = find_pc_line (next_address - 4, 0);
+ sal = find_pc_line (next_address, 0);
+
+ if (sal.symtab)
+ {
+ if (first || sal.line != sal_prev.line)
+ print_source_lines (sal.symtab, sal.line, sal.line + 1, 0);
+ suppress = 0;
+ }
+ else
+ {
+ if (!suppress)
+ /* FIXME-32x64--assumes sal.pc fits in long. */
+ printf_filtered ("No source file for address %s.\n",
+ local_hex_string((unsigned long) sal.pc));
+ suppress = 1;
+ }
+ }
+ first = 0;
+ print_address (next_address, gdb_stdout);
+ printf_filtered (":");
+ printf_filtered ("\t");
+ wrap_here (" ");
+ next_address = next_address + print_insn (next_address, gdb_stdout);
+ printf_filtered ("\n");
+ gdb_flush (gdb_stdout);
+ }
+ }
+}
+
+extern void (*target_resume_hook) PARAMS ((void));
+extern void (*target_wait_loop_hook) PARAMS ((void));
+
+void
+_initialize_d30v_tdep ()
+{
+ tm_print_insn = print_insn_d30v;
+
+ target_resume_hook = d30v_eva_prepare_to_trace;
+ target_wait_loop_hook = d30v_eva_get_trace_data;
+
+ add_com ("trace", class_support, trace_command,
+ "Enable tracing of instruction execution.");
+
+ add_com ("untrace", class_support, untrace_command,
+ "Disable tracing of instruction execution.");
+
+ add_com ("tdisassemble", class_vars, tdisassemble_command,
+ "Disassemble the trace buffer.\n\
+Two optional arguments specify a range of trace buffer entries\n\
+as reported by info trace (NOT addresses!).");
+
+ add_info ("trace", trace_info,
+ "Display info about the trace data buffer.");
+
+ add_show_from_set (add_set_cmd ("tracedisplay", no_class,
+ var_integer, (char *)&trace_display,
+ "Set automatic display of trace.\n", &setlist),
+ &showlist);
+ add_show_from_set (add_set_cmd ("tracesource", no_class,
+ var_integer, (char *)&default_trace_show_source,
+ "Set display of source code with trace.\n", &setlist),
+ &showlist);
+
+}
projects / thirdparty / binutils-gdb.git / commitdiff
