-/* Machine-dependent code which would otherwise be in inflow.c and core.c,
- for GDB, the GNU debugger.
- Copyright (C) 1986, 1987 Free Software Foundation, Inc.
- This code is for the i860 cpu.
-
- GDB is distributed in the hope that it will be useful, but WITHOUT ANY
- WARRANTY. No author or distributor accepts responsibility to anyone
- for the consequences of using it or for whether it serves any
- particular purpose or works at all, unless he says so in writing.
- Refer to the GDB General Public License for full details.
-
- Everyone is granted permission to copy, modify and redistribute GDB,
- but only under the conditions described in the GDB General Public
- License. A copy of this license is supposed to have been given to you
- along with GDB so you can know your rights and responsibilities. It
- should be in a file named COPYING. Among other things, the copyright
- notice and this notice must be preserved on all copies.
-
- In other words, go ahead and share GDB, but don't try to stop
- anyone else from sharing it farther. Help stamp out software hoarding!
- */
-#include <stdio.h>
-#include <stdlib.h>
-#include <stdarg.h>
-
-
-#include "defs.h"
-#include "frame.h"
-#include "inferior.h"
-#include "obstack.h"
-#include "symtab.h"
-#include "value.h"
-#include "gdbcore.h"
-
-#include "i860-opcode.h"
-
-#include "breakpoint.h"
-#include "i860-break.h"
-#include "command.h"
-#include "target.h"
-
-#ifdef notdef
-#include <sys/types.h>
-#include <sys/param.h>
-#include <sys/dir.h>
-#endif
-
-#include <signal.h>
-#include <sys/ioctl.h>
-#include <fcntl.h>
-
-/* #include <sys/reg.h> */
-#include "i860_reg.h"
-
-#include <a.out.h>
-#include <sys/file.h>
-#include <core.h>
-
-#include <sys/user.h>
-#include <elf.h>
-#include <sys/elftypes.h>
-#include <sys/elf_860.h>
-#include <libelf.h>
-
-
-extern int print_insn();
-
-int btdebug = 0; /* change value to 1 to enable debugging code */
-int ansi_conformant;
-
-#define BTDEBUG if (btdebug) btdebug_message
-
-extern int errno;
-extern char registers[];
-CORE_ADDR get_saved_basereg();
-
-#define INSTRUCTION_LENGTH 4
-#define REGISTER_LENGTH 4
-#define ALIGN_ARG(size,len) ((size + (len-1))&(-len))
-#define NUM_FLOAT_ARG_REGS 8
-#define NUM_INT_ARG_REGS 12
-
-/* routine to print debugging messages */
-void btdebug_message(char *format, ...)
-{
- va_list arglist;
- va_start( arglist, format );
-
- if( btdebug )
- vfprintf (stderr, format, arglist );
- va_end ( arglist );
-}
-
-\f
-/* Peggy Fieland. Routine that attempts to find the start of the entry sequence
- for a routine. */
-/* maximum number of instrutions to search back */
-#define MAX_ROUTINE_SIZE 4096
-CORE_ADDR find_entry_start(pc)
-CORE_ADDR pc;
-{
- CORE_ADDR instr, top_pc;
- int i;
-
- top_pc = pc;
- for (i = 0; i < MAX_ROUTINE_SIZE; ++i)
-
- {
- instr = (unsigned)( adj_read_memory_integer (top_pc));
- /* Recognize "addu|adds -X,sp,sp" insn. */
-
- if ((instr & 0xEFFF0000) == 0x84420000)
- {
- return (top_pc);
- }
- top_pc -= INSTRUCTION_LENGTH;
- }
- return (0);
-}
-
-
-\f
-/* Written by Peggy Fieland (Margaret_Fieland@vos.stratus.com) */
-/* get the contents of a base register. Used for dwarf OP_BASEREG */
-/* At present, only OP_BASEREG generated is for R28. NOTE that for stuff based on R28,
- the value we want is the VALUE AT PROCEDURE INVOKATION, and thus is the frame we
- use to get the value is the caller's frame. */
-CORE_ADDR get_saved_basereg (frame, basereg)
-FRAME frame;
-int basereg;
-{
- CORE_ADDR addr;
- if (basereg == R28) /* Unconditionally ??? */
- {
- frame = get_prev_frame (frame);
- get_saved_register((char *) &addr, (int *) NULL, (CORE_ADDR *) NULL, frame,
- basereg, (enum lval_type *)NULL);
-
- }
- else
- get_saved_register((char *) &addr, (int *) NULL, (CORE_ADDR *) NULL, frame,
- basereg, (enum lval_type *)NULL);
-
- return (addr);
-}
-
-\f
-
-/* return nonzero if the routine containing pc has been
- * compiled with -g. We assume -g if the first instruction is
- * an addu|adds -X,sp and the second is st.l fp,XX(sp)
- *
- * based on skip_prologue();
- */
-
-static int g_routine(pc)
-
- CORE_ADDR pc;
-{
- CORE_ADDR instr;
- CORE_ADDR top_pc;
-
- top_pc = get_pc_function_start(pc);
- if (top_pc == NULL)
- top_pc = find_entry_start (pc);
-
- if (top_pc != NULL)
- {
- instr = (unsigned)( adj_read_memory_integer (top_pc));
- /* Recognize "addu|adds -X,sp,sp" insn. */
-
- if ((instr & 0xEFFF0000) == 0x84420000)
- {
- top_pc += INSTRUCTION_LENGTH;
- instr = (unsigned)(adj_read_memory_integer (top_pc));
-
- if( (instr & 0xFFE0F801) == 0x1C401801 ) /* st.l fp,X(sp) */
- return(1);
- }
- }
- return(0);
-}
-
-
-/* return the stack offset where the fp register is stored */
-static int find_fp_offset(pc)
-CORE_ADDR pc;
-{
- int fp_off,i;
- CORE_ADDR instr;
-
- /* look for the instruction and examine the offset */
-
- for (i=INSTRUCTION_LENGTH*1; i< INSTRUCTION_LENGTH*4; i+=INSTRUCTION_LENGTH){
- instr = (unsigned)(adj_read_memory_integer(pc+i));
- if( (instr & 0xFFE0F801) == 0x1C401801) { /* st.l fp,X(sp) */
-
- fp_off = SIGN_EXT16(((instr&0x001F0000) >> 5) |
- (instr&0x000007FE));
- return(fp_off);
- }
- }
- return(0);
-}
-
-
-/* return the stack offset where r1 (return linkage ) register is stored */
-static CORE_ADDR find_r1(pc,sp,fp)
-CORE_ADDR pc,sp, fp;
-{
- int r1_off,i;
- CORE_ADDR instr, ret_pc;
-
- /* look for the instruction and examine the offset */
-
- for (i=INSTRUCTION_LENGTH*1; i< INSTRUCTION_LENGTH*4; i+=INSTRUCTION_LENGTH)
- {
- instr = (unsigned)( adj_read_memory_integer(pc+i));
- if ((instr & 0xFFE0F801) == 0x1C400801)
- {
- /* st.l r1,X(sp) */
-
- r1_off = SIGN_EXT16(((instr&0x001F0000) >> 5) |
- (instr&0x000007FE));
- ret_pc = read_memory_integer(sp+r1_off,sizeof(long));
- return(ret_pc);
- }
- else if ((instr & 0xFFE0F801) == 0x1C600801)
- {
- /* st.l r1,X(fp) */
- r1_off = SIGN_EXT16(((instr&0x001F0000) >> 5) |
- (instr&0x000007FE));
- ret_pc = read_memory_integer(fp+r1_off,sizeof(long));
- return(ret_pc);
- }
- }
- return(0);
-}
-
-CORE_ADDR skip_prologue(CORE_ADDR);
-
-/* does routine starting at pc build a stack frame of any kind?? */
-static int has_a_frame(pc)
-CORE_ADDR pc;
-{
- if( skip_prologue(pc) != pc )return(1);
- else return(0);
-}
-
-
-/* written by Peggy Fieland Margaret_Fieland@vos.stratus.com
- Routine to validate the return register and the frame pointer
- This routine is called when the routine we are in doesn't have a frame
- In that case, we assume that the return address and frame pointer have
- not been touched. In the following routine, we try to range check them
- to see if they are valid. */
-
-static int valid_regs (rp, fp)
-CORE_ADDR rp, fp;
-{
- if ( ( (rp % 4) != 0) | ( (fp % 16) != 0) )
- return (0);
- else
- return (1);
-}
-/* get the pc and frame pointer (or sp )
- * for the routine that called us
- * when we (this_pc) is not within a -g routine
- * if caller is non g we return sp for fp
- */
-
-/* note this is written for Metaware version R2.1d compiler */
-/* Modified by Peggy Fieland Margaret_Fieland@vos.stratus.com */
-static int caller_pc(this_pc,this_sp,this_fp,to_pc,to_fp, called_from_frame_chain)
- CORE_ADDR this_pc,this_sp, this_fp;
- CORE_ADDR *to_pc, *to_fp;
- int called_from_frame_chain;
-{
- CORE_ADDR func_start;
- int sp_offset,offset;
- CORE_ADDR sp,pc,fp,instr;
-
- BTDEBUG("caller_pc %x sp = %x\n",this_pc,this_sp);
-
- func_start = get_pc_function_start(this_pc);
-
- if (func_start == NULL)
- func_start = find_entry_start (this_pc);
-
- BTDEBUG("caller_pc func_start %x\n", func_start);
-
- if ((func_start == NULL))
- {
- /* error in traceback */
- fprintf(stderr, "error, unable to find start of function\n");
- return(0);
-
- }
-
- if (func_start!= NULL)
- {
- if( has_a_frame(func_start) ){
-
- BTDEBUG("has_a_frame\n");
-
- /* if our caller has a preamble and
- * declares space for a stack frame
- * then we must work to find our return address
- */
- instr = (unsigned)( adj_read_memory_integer (func_start));
- /* Recognize "addu|adds -X,sp,sp" insn. */
-
- if ((instr & 0xEFFF0000) == 0x84420000)
- sp_offset=SIGN_EXT16(instr&0x0000FFFF);
- }
- else
- {
- /* if we get here, procedure doesn't have a frame. If we
- do anything weird, the frame pointer and return register have
- the values we want. Check them to see if they are valid. */
-
- CORE_ADDR temp_rp, temp_fp;
-
- /* temporary warning, since at the moment we don't have support for
- the shared library */
-
- temp_rp = read_register(RP_REGNUM);
- temp_fp = read_register(FP_REGNUM);
-
- if (!valid_regs(temp_rp, temp_fp))
- {
- fprintf(stderr,
- "error - unable to find return address, traceback terminating\n");
- return(0);
- }
- BTDEBUG("caller_pc no frame, using r1 %x and fp %x\n",
- temp_rp, temp_fp);
- *to_pc = temp_rp;
- *to_fp = temp_fp;
- return (1);
- }
-
- BTDEBUG("sp_offset = %d %x\n",sp_offset,sp_offset);
-
- pc = find_r1(func_start, this_sp, this_fp);
-
- if(pc == NULL)
- {
-
- /* r1 wasn't stored between pc and function start */
- pc = read_register (RP_REGNUM);
- }
-
- sp= this_sp - sp_offset;
-
- BTDEBUG("callers pc = %x sp = %x\n",pc,sp);
-
- /* our caller a -g routine ?
- * if he is we have to find his real fp
- * else provide the sp as his fp
- */
-
- if( g_routine(pc) ){
-
- BTDEBUG("caller_a_g\n");
-
- if( ! (offset = find_fp_offset(func_start)) ) {
- fprintf(stderr, "error - unable to find caller frame for routine at 0x%x, "
- "traceback terminating\n", func_start);
- return(0);
- }
- BTDEBUG("offset = %x %d\n",offset,offset);
-
- fp = read_memory_integer(this_sp+offset,sizeof(long));
- *to_pc = CLEAN_PC(pc);
- *to_fp = fp;
- return(1);
- }else
- *to_pc = CLEAN_PC(pc);
- *to_fp = sp;
- return(1);
- } else {
-/* pc = read_register(RP_REGNUM); */
-/* pc = 0; */
- /* if we get here, procedure doesn't have a frame. If we didn't
- do anything weird, the frame pointer and return register have
- the values we want. Check them to see if they are valid. */
-
- CORE_ADDR temp_rp, temp_fp;
-
- temp_rp = read_register(RP_REGNUM);
- temp_fp = read_register(FP_REGNUM);
-
- if (!valid_regs(temp_rp, temp_fp))
- {
- fprintf(stderr,
- "error - unable to find return address, traceback terminating\n");
-
- return(0);
- }
- BTDEBUG("caller_pc no frame, using r1 %x and fp %x\n",
- temp_rp, temp_fp);
- *to_pc = temp_rp;
- *to_fp = temp_fp;
- return (1);
- }
-}
-
-/*
- ** Figure out address to place next breakpoint. Avoid tricky spots,
- ** ie. delayed instruction slots etc.
- ** Need to upgrade this later to allow delayed instruction breakpoints
- ** with fix-up work done AFTER breakpoint.
- ** Note that this routine DOES deal with dual instruction mode
- */
-#define BIM 0x8008
-
-static branch_type
- place_brk (addr, mode, brk)
-CORE_ADDR addr;
-int mode;
-struct breakpoint *brk;
-{
- CORE_ADDR instr;
- CORE_ADDR nextadr, prevadr;
- int val = not_branch;
- long offset; /* Must be signed for sign-extend */
- prevadr = nextadr = 0;
-
- brk->address1 = 0;
-
- if (mode == SINGLE_STEP_MODE)
- {
- if (INDIM || ENDIM)
- {
- nextadr = brk->address = (addr + INSTRUCTION_LENGTH*2);
- instr = (unsigned)(adj_read_memory_integer ((addr + INSTRUCTION_LENGTH)));
- brk->mode = DIM;
- }
- else
- {
- nextadr = brk->address = (addr + INSTRUCTION_LENGTH);
- instr = (unsigned)(adj_read_memory_integer (addr));
- if (STDIM)
- brk->mode = DIM;
- else
- brk->mode = SIM;
- }
-
-
- /*
- ** For br/call one more sequential instruction gets executed and then we
- ** continue at the current addr + offset. We are definitely going to
- ** the dest. We are NOT allowed to place a breakpoint in the "delay"
- ** slot - (the next sequential instruction) so we only place 1 breakpoint
- ** at the destination.
- ** For the bc/bnc the next instruction executed is EITHER the next sequential
- ** or the destination of the branch, we therefore place 2 breakpoints one
- ** at each location.
- ** For the bc.t/bnc.t either 1 more sequential instruction is performed
- ** followed by a branch (like br/call) OR we skip the sequential
- ** instruction and keep going. We therefore place a breakpoint at the
- ** destination of the branch AND the second sequential instruction after
- ** the branch. Again a breakpoint is NOT allowed in the "delay slot"
- */
- if ((instr & 0xE0000000) == 0x60000000 && /* CTRL format */
- (instr & 0xF8000000) != 0x60000000) /* not pfld.y */
- {
- if ((instr & 0xF8000000) == 0x68000000) /* br or call */
- val = uncond_d;
- else if ((instr & 0xF4000000) == 0x74000000) /* bc.t/bnc.t */
- val = cond_d;
- else if ((instr & 0xF4000000) == 0x70000000) /* bc or bnc */
- val = cond;
- offset = (instr & 0x03ffffff);
- if (offset & 0x02000000) /*?sign extend*/
- offset |= 0xFC000000;
- if (val == uncond_d) /* br/call*/
- prevadr = 0;
- else if (val == cond_d) /* bc.t/bnc.t */
- {
- if ((INDIM) && !(ENDIM))
- prevadr = nextadr + (2*INSTRUCTION_LENGTH);
- else
- prevadr = nextadr + INSTRUCTION_LENGTH;
- } else { /* bc /bnc */
- if ((INDIM) && !(ENDIM))
- prevadr = nextadr;
- else
- prevadr = nextadr;
- }
- nextadr += (offset << 2);
- }
- /*
- ** We treat the bri/calli the same way as the br/call case.
- */
- else if ((instr & 0xFC00003F) == 0x4C000002 || /* calli */
- (instr & 0xFC000000) == 0x40000000) /* bri */
- {
- val = uncond_d;
- offset = ((instr & 0x0000F800) >> 11);
- nextadr = (read_register(offset + R0) & 0xFFFFFFFC);
- prevadr = 0;
- }
- /*
- ** We treat the bte/btne the same way as the bc/bnc case.
- */
- else if ((instr & 0xF0000000) == 0x50000000) /* bte/btne */
- {
- val = cond;
- offset = SIGN_EXT16(((instr & 0x001F0000) >> 5) |
- (instr & 0x000007FF));
- if ((INDIM) && !(ENDIM))
- prevadr = nextadr;
- else
- prevadr = nextadr;
-
- nextadr += (offset << 2);
- }
- /*
- ** We treat the bte/btne the same way as the bc/bnc case.
- ** With the caveat that the 2 breakpoints may turn out to be at the same
- ** address in which case we ignore one of them.
- */
- else if ((instr & 0xFC000000) == 0xB4000000) /* bla */
- {
- val = cond_d;
- offset = SIGN_EXT16(((instr & 0x001F0000) >> 5) |
- (instr & 0x000007FF));
- if ((INDIM) && !(ENDIM))
- {
- prevadr = nextadr + 2*INSTRUCTION_LENGTH;
- } else {
- prevadr = nextadr + INSTRUCTION_LENGTH;
- }
- nextadr += (offset << 2);
- if (prevadr == nextadr) prevadr = 0;
- }
- } else {
- int adjust = 0;
-
- nextadr = addr;
-
- if (ISDIM(FOPADR(addr)))
- {
- if (ISDIM(FOPADR(nextadr- INSTRUCTION_LENGTH*2)))
- {
- instr = (unsigned)(adj_read_memory_integer(CORADR(addr
- -(INSTRUCTION_LENGTH*2))));
- brk->mode = DIM;
- } else {
- instr = (unsigned)(adj_read_memory_integer(addr-INSTRUCTION_LENGTH));
- brk->mode = RIM;
- }
- } else {
- if (ISDIM(addr-INSTRUCTION_LENGTH))
- {
- instr = (unsigned)(adj_read_memory_integer(addr-INSTRUCTION_LENGTH));
- brk->mode = BIM;
- } else {
- instr = (unsigned)(adj_read_memory_integer (addr-INSTRUCTION_LENGTH));
- brk->mode = SIM;
- }
- }
-
- /* examine the PREVIOUS instruction to determine if we are in a branch delay
- slot. If we are, dont set a break here -- set it on the previous instruction.
- This code also accounts for dual instruction mode */
- if ((instr & 0xE0000000) == 0x60000000 &&
- (instr & 0xF8000000) != 0x60000000) /* not pfld.y */
- {
- adjust++;
- /* br /call */
- /* bc /bnc */
- /* bc.t /bnc.t*/
- if ((instr & 0xF8000000) == 0x68000000) /* br or call */
- BTDEBUG(" Breakpoint adjusted to avoid br/call delay slot and multiple breakpoints\n");
-
- if ((instr & 0xF4000000) == 0x74000000) /* bc.t or bnc.t */
- BTDEBUG(" Breakpoint adjusted to avoid bc.t/bnc.t delay slot and"
- "multiple breakpoints\n");
-
- /* it IS really OK to set a break on the instruction AFTER the conditional branch
- -- it DOESN't have a delay slot */
- if ((instr & 0xF4000000) == 0x70000000) /* bc / bnc */
- adjust = 0;
- } else if
- ((instr & 0xFC00003F) == 0x4C000002 || /* bri/ calli */
- (instr & 0xFC000000) == 0x40000000)
- {
- adjust++;
- BTDEBUG(" Breakpoint adjusted to avoid calli/bri delay slot and"
- " multiple breakpoints\n");
- } else if
- ((instr & 0xF0000000) == 0x50000000) /* bte - btne */
- {
- /* it's OK to set a break here -- we are NOT in aa branch delay slot */
- /*
- adjust++;
- printf(" Breakpoint adjusted to avoid bte/btne multiple breakpoints\n");
- */
- adjust = 0;
- } else if
- ((instr & 0xFC000000) == 0xB4000000)
- {
- adjust++;
- BTDEBUG(" Breakpoint adjusted to avoid bla delay slot and"
- " multiple breakpoints\n");
- }
- if (adjust != 0)
- {
- if (brk->mode == DIM)
- {
- nextadr -= INSTRUCTION_LENGTH*2;
- nextadr = CORADR(nextadr);
- }
- else
- nextadr -= INSTRUCTION_LENGTH;
- }
-
- }
-
- if (brk->mode == RIM)
- brk->mode = DIM;
- if (brk->mode == BIM)
- brk->mode = SIM;
-
- if (nextadr != NULL)
- {
- if (brk->mode == DIM)
- {
- brk->act_addr[0] = CORADR(nextadr);
- brk->act_addr[1] = FOPADR(nextadr);
- } else {
- brk->act_addr[0] = nextadr;
- brk->act_addr[1] = 0;
- }
- }
-
- if (prevadr != NULL)
- {
- brk->address1 = prevadr;
- if (brk->mode == DIM)
- {
- brk->act_addr[2] = CORADR(prevadr);
- brk->act_addr[3] = FOPADR(prevadr);
- } else {
- brk->act_addr[2] = prevadr;
- brk->act_addr[3] = 0;
- }
- } else {
- brk->act_addr[2] = brk->act_addr[3] = 0;
- }
- return val;
-}
-
-/* This routine checks to see if r1 has been stored into the frame between
- the addresses prologue_start and prologue_end. Recognize stores of r1
- relative to both the sp and fp registers. */
-static int has_stored_r1(CORE_ADDR prologue_start, CORE_ADDR prologue_end)
-{
- CORE_ADDR instr;
- CORE_ADDR addr;
-
- BTDEBUG("has_stored_r1, prologue_start %x, prologue_end %x\n",
- prologue_start, prologue_end);
-
- for (addr = prologue_start; addr <= prologue_end; addr += INSTRUCTION_LENGTH)
- {
-
- instr = (unsigned)(adj_read_memory_integer (addr));
- if ((instr & 0xFFE0F801) == 0x1C400801 /* st.l r1,X(sp) */
- || (instr & 0xFFE0F801) == 0x1C600801) /* st.l r1,X(fp) */
- return (1);
- }
- return 0;
-}
-/* This is used when GDB is exiting. It gives less chance of error.*/
-
-
-/* Simulate single-step ptrace call for sun4. Code written by Gary
- Beihl (beihl@mcc.com). */
-/* Modified for i860 by Jim Hanko (hanko@orc.olivetti.com) */
-
-
-static struct breakpoint brk;
-typedef char binsn_quantum[sizeof break_insn];
-
-/* Non-zero if we just simulated a single-step ptrace call. This is
- needed because we cannot remove the breakpoints in the inferior
- process until after the `wait' in `wait_for_inferior'. Used for
- i860. */
-
-int one_stepped;
-
-/* single_step() is called just before we want to resume the inferior,
- if we want to single-step it but there is no hardware or kernel single-step
- support. We find all the possible targets of the coming instruction and
- breakpoint them.
-
- single_step is also called just after the inferior stops. If we had
- set up a simulated single-step, we undo our damage. */
-/* Note that we don't need the parameter, but it's dictated as part of the interface. */
-void
- single_step (signal)
-int signal;
-{
- CORE_ADDR pc;
- branch_type place_brk();
- int *shadow0, *shadow1, *shadow2, *shadow3;
-
- shadow0 = (int *) &brk.shadow_contents[0];
- shadow1 = (int *) &brk.shadow_contents[4];
- shadow2 = (int *) &brk.shadow_contents[8];
- shadow3 = (int *) &brk.shadow_contents[12];
- pc = read_register (PC_REGNUM);
-
- if (!one_stepped)
- {
- brk.address = pc;
- place_brk (pc, SINGLE_STEP_MODE, &brk);
- *shadow0 = *shadow1 = *shadow2 = *shadow3 = 0;
-
- if (brk.mode == DIM)
- {
- if (btdebug != 0)
- {
- btdebug_message(" DIM1 -> %x : ", brk.act_addr[3]);
- print_insn( brk.act_addr[3], stderr);
- btdebug_message("\t -|- %x : ", brk.act_addr[2]);
- print_insn( brk.act_addr[2], stderr);
- btdebug_message("\n");
- }
- if (( brk.address1 != NULL))
- {
- adj_read_memory (brk.act_addr[2], shadow2,
- INSTRUCTION_LENGTH);
- adj_write_memory (brk.act_addr[2], break_insn, INSTRUCTION_LENGTH);
- adj_read_memory (brk.act_addr[3], shadow3,
- INSTRUCTION_LENGTH);
- /* adj_write_memory (brk.act_addr[3], float_insn,
- INSTRUCTION_LENGTH); */
-
- }
- if (btdebug != 0)
- {
- if ( brk.address1 != 0)
- btdebug_message(" DIM2 ->");
- else
- btdebug_message(" DIM1 ->");
-
- btdebug_message(" %x : ", brk.act_addr[1]);
- print_insn( brk.act_addr[1], stderr);
- btdebug_message("\t -|- %x : ", brk.act_addr[0]);
- print_insn( brk.act_addr[0], stderr);
- btdebug_message("\n");
- }
-
- adj_read_memory (brk.act_addr[0], shadow0,
- INSTRUCTION_LENGTH);
- adj_write_memory (brk.act_addr[0], break_insn,
- INSTRUCTION_LENGTH);
- adj_read_memory (brk.act_addr[1], shadow1,
- INSTRUCTION_LENGTH);
- /* adj_write_memory (brk.act_addr[1], float_insn,
- INSTRUCTION_LENGTH); */
-
- }
- else {
- if (brk.address1 != NULL)
- {
- if (btdebug)
- {
- btdebug_message(" SIM1 ->");
- btdebug_message(" %x : ", brk.act_addr[2]);
- print_insn( brk.act_addr[2], stderr);
- btdebug_message("\n");
- }
- adj_read_memory (brk.act_addr[2], shadow2,
- INSTRUCTION_LENGTH);
- adj_write_memory (brk.act_addr[2], break_insn, INSTRUCTION_LENGTH);
- }
- if (btdebug)
- {
- if ( brk.address1 != NULL)
- btdebug_message(" SIM2 ->");
- else
- btdebug_message(" SIM1 ->");
-
- btdebug_message(" %x : ", brk.act_addr[0]);
- print_insn( brk.act_addr[0], stderr);
- btdebug_message("\n");
- }
- adj_read_memory (brk.act_addr[0], shadow0,
- INSTRUCTION_LENGTH);
- adj_write_memory (brk.act_addr[0], break_insn,INSTRUCTION_LENGTH);
- }
-
- /* Let it go */
- one_stepped = 1;
- return;
- }
- else
- {
- /* Remove breakpoints */
- if (brk.mode == DIM)
- {
- adj_write_memory (brk.act_addr[0], shadow0,
- INSTRUCTION_LENGTH);
- adj_write_memory (brk.act_addr[1], shadow1,
- INSTRUCTION_LENGTH);
- } else {
- adj_write_memory (brk.act_addr[0], shadow0,
- INSTRUCTION_LENGTH);
- }
-
- if (brk.address1 != NULL)
- {
- if (brk.mode == DIM)
- {
- adj_write_memory (brk.act_addr[2], shadow2,
- INSTRUCTION_LENGTH);
- adj_write_memory (brk.act_addr[3], shadow3,
- INSTRUCTION_LENGTH);
- } else {
- adj_write_memory (brk.act_addr[2], shadow2,
- INSTRUCTION_LENGTH);
- }
- }
- one_stepped = 0;
- }
-}
-
-
-
-/* Written for i860 by Jim Hanko (hanko@orc.olivetti.com) */
-/* This code was based on SPARC code written by Gary Beihl (beihl@mcc.com),
- by Michael Tiemann (tiemann@corto.inria.fr). */
-/* This routine returns the first memory address following the prologue code,
- if there is a prologue. */
-
-struct command_line *get_breakpoint_commands ();
-
-CORE_ADDR
- skip_prologue (pc)
-CORE_ADDR pc;
-{
- CORE_ADDR instr;
- int regno;
-
- instr = (unsigned)(adj_read_memory_integer (pc));
-
- /* Recognize "addu|adds -X,sp,sp" insn. */
- if ((instr & 0xEFFF0000) == 0x84420000)
- {
- pc += INSTRUCTION_LENGTH;
- instr = (unsigned)(adj_read_memory_integer (pc));
- }
- else
- return(pc); /* No frame! */
-
- /* Recognize store of return addr and frame pointer into frame */
- for (; ;)
- {
- if ((instr & 0xFFE0F801) == 0x1C400801 || /* st.l r1,X(sp) */
- (instr & 0xFFE0F801) == 0x1C401801) /* st.l fp,X(sp) */
- {
- pc += INSTRUCTION_LENGTH;
- instr = (unsigned)(adj_read_memory_integer (pc));
- }
- else
- break;
- }
-
- /* Recognize "addu|adds X,sp,fp" insn. */
- if ((instr & 0xEFFF0000) == 0x84430000)
- {
- pc += INSTRUCTION_LENGTH;
- instr = (unsigned)(adj_read_memory_integer (pc));
- }
-
- /* Now recognize stores into the frame from the registers. */
-
- for (; ;)
- {
- if ((instr & 0xFFA00003) == 0x1C200001 || /* st.l rn,X(fp|sp) */
- (instr & 0xFFA00001) == 0x4C200000) /* fst.y fn,X(fp|sp) */
- {
- regno = (instr >> 11) & 0x1f;
- if (regno == 0) /* source reg == 0? quit */
- break;
- pc += INSTRUCTION_LENGTH;
- instr = (unsigned)(adj_read_memory_integer (pc));
- }
- else
- break;
- }
-
- return(pc);
-}
-
-#if 0
-/* This routine is uncalled. Remove it sometime. */
-/* Set *nextpc to branch target if we find a branch. If it is not a branch,
- set it to the next instruction (addr + 4) */
-
-
-branch_type
- isabranch (addr, nextpc)
-CORE_ADDR addr, *nextpc;
-{
- CORE_ADDR instr;
- branch_type val = not_branch;
- long offset; /* Must be signed for sign-extend */
-
- BTDEBUG(" isabranch\n");
- *nextpc = addr;
- instr = (unsigned)(adj_read_memory_integer (addr));
-
- if ((instr & 0xE0000000) == 0x60000000 && /* CTRL format */
- (instr & 0xF8000000) != 0x60000000) /* not pfld.y */
- {
- if ((instr & 0xF8000000) == 0x68000000) /* br or call */
- val = uncond_d;
- else if ((instr & 0xF4000000) == 0x74000000) /* bc.t or bnc.t */
- val = cond_d;
- else if ((instr & 0xF4000000) == 0x70000000) /* bc or bnc */
- val = cond;
-
- offset = (instr & 0x03ffffff);
- if (offset & 0x02000000) /* sign extend? */
- offset |= 0xFC000000;
- *nextpc = addr + 4 + (offset << 2);
- }
- else if ((instr & 0xFC00003F) == 0x4C000002 || /* calli */
- (instr & 0xFC000000) == 0x40000000) /* bri */
- {
- val = uncond_d;
- offset = ((instr & 0x0000F800) >> 11);
- *nextpc = (read_register(offset) & 0xFFFFFFFC);
- }
- else if ((instr & 0xF0000000) == 0x50000000) /* bte or btne */
- {
- val = cond;
-
- offset = SIGN_EXT16(((instr & 0x001F0000) >> 5) | (instr & 0x000007FF));
- *nextpc = addr + 4 + (offset << 2);
- }
- else if ((instr & 0xFC000000) == 0xB4000000) /* bla */
- {
- val = cond_d;
-
- offset = SIGN_EXT16(((instr & 0x001F0000) >> 5) | (instr & 0x000007FF));
- *nextpc = addr + 4 + (offset << 2);
- }
-
- BTDEBUG(" Final addr - %x\n", *nextpc);
- /*BTDEBUG("isabranch ret: %d\n",val); */
- return val;
-}
-#endif
-
-/* set in call_function() [valops.c] to the address of the "call dummy" code
- so dummy frames can be easily recognized; also used in wait_for_inferior()
- [infrun.c]. When not used, it points into the ABI's 'reserved area' */
-
-CORE_ADDR call_dummy_set = 0; /* true if dummy call being done */
-CORE_ADDR call_dummy_start; /* address of call dummy code */
-
-/* this routine routine gets the values of the registers stored in the frame
- and stores their values into the frame_saved_regs structure. */
-
-void
-frame_find_saved_regs(frame_info, frame_saved_regs)
- struct frame_info *frame_info;
- struct frame_saved_regs *frame_saved_regs;
-{
- register CORE_ADDR pc;
- CORE_ADDR instr;
- long offset, spdelta = 0;
- int i, size, reg;
- int r1_off = -1, fp_off = -1;
- int framesize;
-
- bzero (frame_saved_regs, sizeof(*frame_saved_regs));
-
- if (call_dummy_set && frame_info->pc >= call_dummy_start &&
- frame_info->pc <= call_dummy_start + CALL_DUMMY_LENGTH)
- {
- /* DUMMY frame - all registers stored in order at fp; old sp is
- at fp + NUM_REGS*4 */
-
- for (i = 1; i < NUM_REGS; i++) /* skip reg 0 */
- /* the register numbers used in the instruction and the ones used to index
- the regs array are not the same -- compensate */
- frame_saved_regs->regs[i+R0] = frame_info->frame + i*REGISTER_LENGTH;
-
- call_dummy_set = 0;
- return;
- }
-
- pc = get_pc_function_start (frame_info->pc);
- if (pc == NULL)
- pc = find_entry_start (frame_info->pc);
-
- if (pc != NULL)
- {
- instr = (unsigned)(adj_read_memory_integer (pc));
- /* Recognize "addu|adds -X,sp,sp" insn. */
- if ((instr & 0xEFFF0000) == 0x84420000)
- {
- framesize = -SIGN_EXT16(instr & 0x0000FFFF);
- pc += INSTRUCTION_LENGTH;
- instr = (unsigned)(adj_read_memory_integer (pc));
- }
- }
- else
- goto punt; /* No frame! */
-
- /* Recognize store of return addr and frame pointer into frame */
- for (; ;)
- {
- if ((instr & 0xFFE0F801) == 0x1C400801) /* st.l r1,X(sp) */
- {
- r1_off = SIGN_EXT16(((instr&0x001F0000) >> 5) | (instr&0x000007FE));
- pc += INSTRUCTION_LENGTH;
- instr = (unsigned)(adj_read_memory_integer (pc));
- }
- else if ((instr & 0xFFE0F801) == 0x1C401801) /* st.l fp,X(sp) */
- {
- fp_off = SIGN_EXT16(((instr&0x001F0000) >> 5) | (instr&0x000007FE));
- pc += INSTRUCTION_LENGTH;
- instr = (unsigned)(adj_read_memory_integer (pc));
- }
- else
- break;
- }
-
- /* Recognize "addu|adds X,sp,fp" insn. */
- if ((instr & 0xEFFF0000) == 0x84430000)
- {
- spdelta = SIGN_EXT16(instr & 0x0000FFFF);
- pc += INSTRUCTION_LENGTH;
- instr = (unsigned)(adj_read_memory_integer (pc));
- }
-
- /* Now recognize stores into the frame from the registers. */
-
- for (; ;)
- {
- if ((instr & 0xFFC00003) == 0x1C400001) /* st.l rn,X(fp|sp) */
- {
- offset = SIGN_EXT16(((instr&0x001F0000) >> 5) | (instr&0x000007FE));
- reg = (instr >> 11) & 0x1F;
- if (reg == 0)
- break;
- if ((instr & 0x00200000) == 0) /* was this using sp? */
- if (spdelta != 0) /* and we know sp-fp delta */
- offset -= spdelta; /* if so, adjust the offset */
- else
- break; /* if not, give up */
-
-
- /* Handle the case where the return address is stored after the fp
- is adjusted */
-
- if (reg == 1)
- frame_saved_regs->regs[PC_REGNUM] = frame_info->frame + offset;
- else
- frame_saved_regs->regs[reg+R0] = frame_info->frame + offset;
-
- pc += INSTRUCTION_LENGTH;
- instr = (unsigned)(adj_read_memory_integer (pc));
- }
- else if ((instr & 0xFFC00001) == 0x2C400000) /* fst.y fn,X(fp|sp) */
- {
- /*
- * The number of words in a floating store based on 3 LSB of instr
- */
- static int fst_sizes[] = {2, 0, 1, 0, 4, 0, 1, 0};
-
- size = fst_sizes[instr & 7];
- reg = ((instr >> 16) & 0x1F) + FP0_REGNUM;
- if (reg == 0)
- break;
-
- if (size > 1) /* align the offset */
- offset = SIGN_EXT16(instr & 0x0000FFF8); /* drop 3 bits */
- else
- offset = SIGN_EXT16(instr & 0x0000FFFC); /* drop 2 bits */
-
- if ((instr & 0x00200000) == 0) /* was this using sp? */
- if (spdelta != 0) /* and we know sp-fp delta */
- offset -= spdelta; /* if so, adjust the offset */
- else
- break; /* if not, give up */
-
- for (i = 0; i < size; i++)
- {
- frame_saved_regs->regs[reg] = frame_info->frame + offset;
-
- offset += REGISTER_LENGTH;
- reg++;
- }
-
- pc += INSTRUCTION_LENGTH;
- instr = (unsigned)(adj_read_memory_integer (pc));
- }
- else
- break;
- }
-
- punt: ;
- if (framesize != 0 && spdelta != 0)
- frame_saved_regs->regs[SP_REGNUM] = frame_info->frame+(framesize-spdelta);
- else
- frame_saved_regs->regs[SP_REGNUM] = frame_info->frame + 8;
-
- if ((spdelta != 0) && fp_off != -1)
- frame_saved_regs->regs[FP_REGNUM] = frame_info->frame - spdelta + fp_off;
- else
- frame_saved_regs->regs[FP_REGNUM] = frame_info->frame;
-
- if ((spdelta != 0) && r1_off != -1)
- frame_saved_regs->regs[PC_REGNUM] = frame_info->frame - spdelta + r1_off;
- else
- frame_saved_regs->regs[PC_REGNUM] = frame_info->frame + 4;
-}
-
-
-/* get the frame pointer of the caller.
- * note that only routines that have been compiled with
- * -g have full (XX)fp style stack frames
- * if we are not returning to a non -g caller then we
- * return the sp at entry to us as it is the caller's
- * frame reference.
- */
-
-frame_chain(thisframe)
- FRAME thisframe;
-{
- CORE_ADDR fp, pc;
- CORE_ADDR func_start;
- CORE_ADDR instr;
- int offset;
- CORE_ADDR thisfp = thisframe->frame;
- struct frame_saved_regs fsr;
- CORE_ADDR thissp;
-
- /* get the frame pointer actually sp for a non -g
- * for the routine that called us routine
- */
-
- BTDEBUG("FRAME_CHAIN(%x)\n",thisframe);
-
- if ( !read_memory_integer (thisframe->frame,sizeof(long)) )
- {
- return (0);
- }
-
- if( ! g_routine(thisframe->pc) ){
- thissp = get_saved_basereg (thisframe, SP_REGNUM);
-
- BTDEBUG( "non g at %x\n",thisframe->pc);
- caller_pc(thisframe->pc, thissp, thisfp,&pc,&fp, 1);
- BTDEBUG("caller_pc returned %x %x \n",pc,fp);
- return(fp);
-
- }/* else a -g routine */
-
-
- fp = read_memory_integer (thisfp, sizeof(long));
-
- if (fp < thisfp || fp > (unsigned) STACK_END_ADDR)
- {
- /* handle the Metaware-type pseudo-frame */
-
- func_start = get_pc_function_start(thisframe->pc);
- if (func_start == NULL)
- func_start = find_entry_start (thisframe->pc);
-
- if (func_start != NULL)
- {
-
- instr = (unsigned)(adj_read_memory_integer (func_start));
- /* Recognize "addu|adds -X,sp,sp" insn. */
- if ((instr & 0xEFFF0000) == 0x84420000)
- offset = SIGN_EXT16(instr & 0x0000FFFF);
-
- }
-
- fp = 0;
- if (offset < 0)
- fp = thisfp - offset;
- }
- BTDEBUG("frame_chain returned %d\n",fp);
- return(fp);
-}
-
-/* This function returns 1 if there is no stored r1, 0 otherwise.
- The function returns 1 if the pc is in a function prologue,
- or the function prologue didn't save the return pointer in
- the stack frame, 0 otherwise */
-
-int no_stored_rp(CORE_ADDR pc)
-{
- CORE_ADDR func_start, prologue_end;
-
- func_start = get_pc_function_start(pc);
- if (func_start == NULL)
- func_start = find_entry_start (pc);
-
- if (func_start != NULL)
- {
- prologue_end = func_start;
- SKIP_PROLOGUE(prologue_end);
- if ( (pc >= func_start) && (pc <= prologue_end))
- {
- BTDEBUG("no_stored_rp: pc %x is in prologue \n",pc);
- return 1;
- }
- /* otherwise, see if the entry sequence stored the return pointer.
- If it didn't, return 1 */
- /* Some procedures , at least, store the return pointer AFTER
- the prologue sequence, so check for stores from function start to
- present pc value. */
- if (!has_stored_r1(func_start, pc))
- {
- BTDEBUG("no_stored_rp, for pc %x, prologue didn't store r1\n",pc);
- return 1;
- }
- }
- BTDEBUG("no_stored_rp for pc %x return pointer was stored \n", pc);
-
- return 0;
-}
-
-/* get the PC of the caller */
-CORE_ADDR frame_saved_pc(frame_struct)
-FRAME frame_struct;
-{
- CORE_ADDR frame;
- CORE_ADDR pc;
- CORE_ADDR pc1;
- CORE_ADDR sp ;
- CORE_ADDR fp;
- struct frame_saved_regs fsr;
-
- frame = frame_struct->frame;
- pc = frame_struct->pc;
-
-
- BTDEBUG("frame_saved_pc input: frame %x, pc %x",
- frame, pc);
-
- /* First see if this is the current frame. If it is, return the value in r1,
- as it may not have been stored */
-
- fp = read_register(FP_REGNUM);
-
- /* check to see if we are in an entry sequence, where the return pointer has not yet been stored */
- if (fp == frame && no_stored_rp(pc))
- {
- pc = read_register(RP_REGNUM);
- frame_struct->rp = pc;
- }
- else if( ! g_routine(pc) )
- {
- sp = get_saved_basereg (frame_struct, SP_REGNUM);
-
- caller_pc(pc,sp,frame_struct->frame, &pc,&frame, 0);
- }
- else
- {
-
- pc = read_memory_integer (frame + 4, sizeof(long));
-
- if (inside_entry_file(pc))
- {
-
- BTDEBUG("pc %x outside entry file \n",pc);
-
- pc1 = read_memory_integer (frame, sizeof(long));
-
- if (!inside_entry_file(pc1))
- pc = pc1;
- else
- pc = 0;
- }
- }
- BTDEBUG(" returning pc %x\n", CLEAN_PC(pc));
- return(CLEAN_PC(pc));
-
- }
-
-/* Pass arguments to a function in the inferior process - ABI compliant
- Modified by Peggy Fieland (Margaret_Fieland@vos.stratus.com) to account
- for newer ABI conventions. Note that now, unfortunately, we MUST KNOW
- if we expect a float or a double. For now, we will assume that the
- caller of this routine has the types of these arguments correct....
- NOTE THAT THIS ROUTINE DOES NO ARGUMENT COERCION -- it's all in the
- caller.
- Modified by Peggy Fieland to handle memory argument lists.
- */
-
-#define IS_EVEN_REG(fl) (((fl - FP0_REGNUM)%2) == 0)
-CORE_ADDR
-pass_function_arguments(args, nargs, struct_return, struct_addr, sp)
- value *args;
- int nargs;
- int struct_return;
- CORE_ADDR struct_addr;
- CORE_ADDR sp;
-{
- int ireg = (struct_return) ? R17 : R16;
- int freg = F8;
- int i;
- struct type *type;
- value arg;
- signed long tmp;
- unsigned long ul_tmp;
- signed short s_tmp;
- unsigned short us_tmp;
- signed char c_tmp;
- unsigned char uc_tmp;
- CORE_ADDR arg_ptr;
- int len;
-
- if (struct_return)
- {
- write_register(R16, struct_addr);
- }
-
- arg_ptr = sp; /* Space was allocated for memory argument list in i860_arg_coerce */
-
- /* Loop through the arguments, putting the values in a register or memory as appropriate. */
-
- for (i = 0; i < nargs; i++)
- {
- arg = args[i];
- type = VALUE_TYPE(arg);
- len = TYPE_LENGTH(type);
- if (type == builtin_type_double)
- {
- /* see ABI . Note freg MUST BE INCREMENTED even if arg goes into the
- memory argument list for this code to work correctly for subsequent
- arguments. */
- if (!IS_EVEN_REG(freg))
- freg += 1;
- /* see if argument can be put in a register, or whether it must go
- into the memory argument list */
- if (freg < F8 + NUM_FLOAT_ARG_REGS)
- {
- /* It can go in a register */
- bcopy(VALUE_CONTENTS(arg), &tmp, sizeof(double));
- write_register_bytes(REGISTER_BYTE(freg), (char *) &tmp, TYPE_LENGTH(type));
- freg += 2;
- }
- else
- {
- /* It goes into memory argument list */
- arg_ptr = ALIGN_ARG( arg_ptr, sizeof(double));
- write_memory (arg_ptr, VALUE_CONTENTS (arg), len);
- arg_ptr += len;
- }
-
- }
- else if (type == builtin_type_float)
- {
- if (freg < F8 + NUM_FLOAT_ARG_REGS)
- {
- /* It can go in a register */
- bcopy(VALUE_CONTENTS(arg), &tmp, sizeof(long));
- write_register_bytes (REGISTER_BYTE(freg), (char *) &tmp, TYPE_LENGTH(type));
- freg++;
- }
- else
- {
- /* It goes into the memory argument list */
- arg_ptr = ALIGN_ARG(arg_ptr, sizeof(float));
- write_memory (arg_ptr, VALUE_CONTENTS (arg), len);
- arg_ptr += len;
- }
- }
- else
- {
- /* All structs are passed by value, and hence they all go into the memory
- argument list (see ABI); otherwise, as above, see if we have run
- out of registers */
-
- /* Cast value correctly so we can load it into a register or into the
- memory argument list -- see ABI */
- if (TYPE_LENGTH(type) < sizeof(long))
- {
- if (TYPE_FLAGS(type) & TYPE_FLAG_UNSIGNED)
- arg = value_cast(builtin_type_unsigned_int, arg);
- else
- arg = value_cast (builtin_type_int, arg);
- type = VALUE_TYPE(arg);
- len = TYPE_LENGTH(type);
- }
-
- if ((TYPE_CODE(type) == TYPE_CODE_STRUCT) || (ireg >= R16 + NUM_INT_ARG_REGS))
- {
- /* It goes into the memory argument list. Minimum alignment requirements
- are on a 4-byte boundary */
-
- if ((TYPE_CODE(type) == TYPE_CODE_INT) ||
- (TYPE_CODE(type) == TYPE_CODE_ENUM) ||
- (TYPE_CODE(type) == TYPE_CODE_CHAR) ||
- (TYPE_CODE(type) == TYPE_CODE_BOOL))
- arg_ptr = ALIGN_ARG(arg_ptr, len);
- else
- arg_ptr = ALIGN_ARG (arg_ptr, sizeof(long)); /* align on 4-byte boundary */
- write_memory (arg_ptr, VALUE_CONTENTS (arg), len);
- arg_ptr += len;
- }
- else
- {
-
- bcopy(VALUE_CONTENTS(arg), &tmp, sizeof(long));
- write_register(ireg, tmp);
- ireg++;
- }
-
- }
- }
-
-
- return (sp);
-
-}
-
-
-#define SPACES " "
-#define P_SPACES " "
-#define BYTE 0xff
-
-int screen_lines=24;
-
-char *spec_reg[] = {
- "fsr", "db", "dirbase", "fir", "psr", "epsr",
-};
-
-char *doro_reg[] = {
- "scp", "cbsp", "pt_cs", "intmsk", "intack",
-};
-#define NREGS 32
-
-
-get_reg(regno)
-{
- char raw_buffer[32];
- int addr;
- int virtual_buffer;
-
- /* NOTE that only integer and floating point registers can be relative to a frame */
-
- if ((regno >= R0) && (regno <= F31)) /* user register */
- read_relative_register_raw_bytes (regno, raw_buffer);
- else
- bcopy (®isters[regno << 2], raw_buffer, sizeof (long));
-
- REGISTER_CONVERT_TO_VIRTUAL (addr, raw_buffer, &virtual_buffer);
- return(virtual_buffer);
-}
-
-
-#if 0
-/* This routine is uncalled. Remove it sometime. */
-
-/*
- ** Figure out whether we are in a delayed slot and if so then take necessary
- ** action to resume properly - remember trap pre-empts instruction
- */
-int
- wasabranch (addr, nextpc, ss)
-CORE_ADDR addr, *nextpc;
-int ss;
-{
- CORE_ADDR nextadr, instr;
- int val = not_branch;
- long offset; /* Must be signed for sign-extend */
-
- if (ss)
- {
- if (INDIM)
- {
- nextadr = CORADR((int)(addr + INSTRUCTION_LENGTH*2));
- instr = (unsigned)(adj_read_memory_integer (CORADR(addr)));
- }
- else
- {
- nextadr = addr + INSTRUCTION_LENGTH;
- instr = (unsigned)(adj_read_memory_integer (addr));
- }
- } else {
- if (ISDIM(addr))
- {
- nextadr = CORADR(addr);
- instr = (unsigned)(adj_read_memory_integer (nextadr));
- }
- else
- {
- nextadr = addr;
- instr = (unsigned)(adj_read_memory_integer (addr));
- }
- }
-
-
- if ((instr & 0xE0000000) == 0x60000000 && /* CTRL format */
- (instr & 0xF8000000) != 0x60000000) /* not pfld.y */
- {
- if ((instr & 0xF8000000) == 0x68000000) /* br or call */
- val = uncond_d;
- else if ((instr & 0xF4000000) == 0x74000000) /* bc.t or bnc.t */
- val = cond_d;
- else if ((instr & 0xF4000000) == 0x70000000) /* bc or bnc */
- val = cond;
-
- offset = (instr & 0x03ffffff);
- if (offset & 0x02000000) /* sign extend? */
- offset |= 0xFC000000;
- nextadr += (offset << 2);
- }
- else if ((instr & 0xFC00003F) == 0x4C000002 || /* calli */
- (instr & 0xFC000000) == 0x40000000) /* bri */
- {
- if (ss)
- {
- val = uncond_d;
- offset = ((instr & 0x0000F800) >> 11);
- nextadr = (read_register(offset) & 0xFFFFFFFC);
- } else {
- val = uncond_d;
- }
- }
- else if ((instr & 0xF0000000) == 0x50000000) /* bte or btne */
- {
- val = cond;
-
- offset = SIGN_EXT16(((instr & 0x001F0000) >> 5) | (instr & 0x000007FF));
- nextadr += (offset << 2);
- }
- else if ((instr & 0xFC000000) == 0xB4000000) /* bla */
- {
- val = cond_d;
-
- offset = SIGN_EXT16(((instr & 0x001F0000) >> 5) | (instr & 0x000007FF));
- nextadr += (offset << 2);
- }
-
- *nextpc = nextadr;
- return val;
-}
-#endif
-
-
-/* i860-specific routine to print the register set. Note that we ALWAYS print information
- on the floating point registers, so we ignore the parameter fpregs.
- NOTE also that only integer and floating point registers can be relative to a frame --
- see subroutine get_reg (above ) */
-
-void i860_do_registers_info(regnum,fpregs)
- int regnum;
- int fpregs;
-{
- register int i;
- unsigned int val;
- unsigned int j,k;
-
-
- if (regnum == -1)
- printf_filtered (
- "Register Contents (relative to selected stack frame)\n\n");
-
- if (regnum != -1) /* print one register */
- {
- val = get_reg(regnum);
- printf("%-4s 0x%08x\t", reg_names[regnum], val);
- printf("\n\t"); fflush(stdout);
- }
- else /* print all registers */
- {
-
- printf("\n Control/Status Registers :- \n\t");
- for (j=0; j<=DB; j++)
- {
- val = get_reg(j);
- printf("%-4s 0x%08x\t", reg_names[j], val);
- }
- printf("\n\t"); fflush(stdout);
-
- /* EPSR */
- val = get_reg(EPSR);
- printf("%-4s 0x%08x\t", reg_names[EPSR], val);
-
- /* FSR */
- val = get_reg(FSR);
- printf("%-4s 0x%08x\t", reg_names[FSR], val);
-
- /* CCR */
- val = get_reg(CCR);
- printf("%-4s 0x%08x\t", reg_names[CCR], val);
- /* BEAR*/
- val = get_reg(BEAR);
- printf("%-4s 0x%08x\t", reg_names[BEAR], val);
-
-
-#ifdef JIM_ADD_PRIV
- for (j=P0; j<=P3; j++)
- {
- val = get_reg(j);
- printf("%-4s 0x%08x\t", reg_names[j], val);
- }
-#endif
-
- printf("\n Integer Registers :- \n\t");
- for (j=R0; j<=R31; j++)
- {
- if (j != IREGS && (j % REGISTER_LENGTH == 0))
- {
- printf("\n\t"); fflush(stdout);
- }
- val = get_reg(j);
- printf("%-4s 0x%08x\t", reg_names[j], val);
- }
-
- printf("\n Floating Registers :- \n\t");
- for (j=F0; j<=F31; j++)
- {
- if (j != FREGS && (j % REGISTER_LENGTH == 0))
- {
- printf("\n\t"); fflush(stdout);
- }
- val = get_reg(j);
- printf("%-4s 0x%08x\t", reg_names[j], val);
- }
-
- printf("\n Special Registers :- \n\t");
- for (j=SPC_KI; j<=SPC_MERGE; j+=2)
- {
- unsigned int valh;
- if (j == SPC_T)
- {
- printf("\n\t"); fflush(stdout);
- }
- val = get_reg(j);
- valh = get_reg(j+1);
- printf("%-6s 0x%08x %08x\t", reg_names[j], val,valh);
- }
-
- printf("\n Graphics Pipeline :- \n");
- {
- unsigned int valh;
- j = PSV_I1;
- val = get_reg(j);
- valh = get_reg(j+1);
- printf("\t\t\t%-8s 0x%08x %08x \n", reg_names[j], val,valh);
- }
-
- printf(" Memory Load Pipeline :- \n");
- for (j=PSV_L1; j<=PSV_L3; j+=REGISTER_LENGTH)
- {
- unsigned int valh, val2,val3;
-
- val = get_reg(j);
- valh = get_reg(j+1);
- val2 = get_reg(j+2);
- val3 = get_reg(j+3);
-
- printf("\t\t%-8s 0x%08x %08x %08x %08x\n", reg_names[j],
- val,valh,val2,val3);
- }
-
- printf("\n Adder Pipeline :-\t\tMultiplier Pipeline :-\t\tFSR results :-\n");
- for (i=PSV_FSR1,j=PSV_A1,k=PSV_M1; j<=PSV_A3; i++,j+=2,k+=2)
- {
- unsigned int valh,val2,val3,val4;
-
- val4 = get_reg(i);
- val = get_reg(j);
- valh = get_reg(j+1);
- val2 = get_reg(k);
- val3 = get_reg(k+1);
-
- printf(" %-4s 0x%08x %08x\t", reg_names[j], val,valh);
- printf("%-4s 0x%08x %08x\t", reg_names[k], val2,val3);
- printf("%-4s 0x%08x\n", reg_names[i], val4);
- }
-
- }
-
-
-}
-
-
-
-/* The following set of routines was adapted from existing code previously
- in an i860-specific version of breakpoint.c by Peggy Fieland
- (Margaret_Fieland@vos.stratus.com) */
-/* routines to set a data breakpoint by setting the value in the DB register.
- Note that "hitting" the breakpoint will generate a data access trap. We
- do not have a special trap handler. */
-unsigned int dbrkval, dbrkmod;
-void i860_dbrk_breakpoint()
-{
- BTDEBUG("i860_dbrk_breakpoint was called , dbrkval %x\n", dbrkval);
-
- if (dbrkval != 0)
- {
- *(int *)®isters[DB<<2] = dbrkval;
- }
- else
- {
- *(int *)®isters[DB<<2] = 0;
- }
-
- *(int *)®isters[PSR<<2] &= ~3;
- *(int *)®isters[PSR<<2] |= dbrkmod;
-
- store_inferior_registers(DB);
- store_inferior_registers(PSR);
-
-}
-
-/* set a "read" data breakpoint. */
-void
-d_ro_break_command(char *arg, int num)
-{
- dbrkval = strtoul(arg, NULL, 0);
- dbrkmod = 0x01;
- BTDEBUG(" ro_dbreak - %x %x\n", dbrkval, dbrkmod);
-}
-
-/* set a "write" data breakpoint. */
-void
-d_wo_break_command(char *arg, int num)
-{
- dbrkval = strtoul(arg, NULL, 0);
- dbrkmod = 0x02;
- BTDEBUG(" wo_dbreak - %x %x\n", dbrkval, dbrkmod);
-}
-
-/* set a "read/write" data breakpoint. */
-void
-d_rw_break_command(char *arg, int num)
-{
- dbrkval = strtoul(arg, NULL, 0);
- dbrkmod = 0x03;
- BTDEBUG(" rw_dbreak - %x %x\n", dbrkval, dbrkmod);
- }
-
-/* clear data breakpoint. */
- void clear_dbreak(char *arg, int num)
- {
- dbrkval = 0;
- dbrkmod = 0;
- }
-
-/* i860-specific breakpoint initialization. Includes adding the
-i860-specific data breakpoint commands. */
-void i860_init_breakpoints()
-{
- dbrkval = dbrkmod = 0;
- add_com ("dbro", class_breakpoint, d_ro_break_command,
- "Set a data breakpoint READ ONLY, 32-bit data element.");
- add_com ("dbwo", class_breakpoint, d_wo_break_command,
- "Set a data breakpoint WRITE ONLY, 32-bit data element.");
- add_com ("dbrw", class_breakpoint, d_rw_break_command,
- "Set a data breakpoint READ/WRITE, 32-bit data element.");
- add_com ("dclear", class_breakpoint, clear_dbreak,
- "clear the current data breakpoint.");
- add_com_alias ("dc", "dclear", class_breakpoint, 1);
-
-}
-
-/* i860-specific code to insert a breakpoint. */
-int i860_insert_breakpoint(b)
-struct breakpoint *b;
-{
- int val;
- int *shadow0, *shadow1, *shadow2, *shadow3;
-
- shadow0 = (int *)&b->shadow_contents[0];
- shadow1 = (int *)&b->shadow_contents[4];
- shadow2 = (int *)&b->shadow_contents[8];
- shadow3 = (int *)&b->shadow_contents[12];
-
- place_brk( b->address, BREAK_MODE, b );
-
- if (b->mode == DIM)
- {
-
- adj_read_memory (b->act_addr[0], shadow0, INSTRUCTION_LENGTH);
- val = adj_write_memory (b->act_addr[0], break_insn, INSTRUCTION_LENGTH);
- if (val != 0 ) return val;
- adj_read_memory (b->act_addr[1], shadow1, INSTRUCTION_LENGTH);
- /* val = adj_write_memory (b->act_addr[1], float_insn, INSTRUCTION_LENGTH); */
- if (val != 0) return val;
- }
- else
- {
- adj_read_memory (b->act_addr[0], shadow0, INSTRUCTION_LENGTH);
- val = adj_write_memory (b->act_addr[0], break_insn, INSTRUCTION_LENGTH);
- }
- if (b->address1 != 0)
- {
- if (b->mode == DIM)
- {
-
- adj_read_memory (b->act_addr[2], shadow2, INSTRUCTION_LENGTH);
- val = adj_write_memory (b->act_addr[2], break_insn, INSTRUCTION_LENGTH);
- if (val) return val;
- adj_read_memory (b->act_addr[3], shadow3, INSTRUCTION_LENGTH);
- /* val = adj_write_memory (b->act_addr[3], float_insn, INSTRUCTION_LENGTH); */
- if (val != 0) return val;
- }
- else
- {
- adj_read_memory (b->act_addr[2], shadow0, INSTRUCTION_LENGTH);
- val = adj_write_memory (b->act_addr[2], break_insn, INSTRUCTION_LENGTH);
- }
- }
- if (val != 0)
- return val;
-
- b->inserted = 1;
- return 0;
-}
-
-int i860_remove_breakpoint(b)
-struct breakpoint *b;
-{
- int val;
- int *shadow0, *shadow1, *shadow2, *shadow3;
-
- shadow0 = (int *)&b->shadow_contents[0];
- shadow1 = (int *)&b->shadow_contents[4];
- shadow2 = (int *)&b->shadow_contents[8];
- shadow3 = (int *)&b->shadow_contents[12];
-
-
- if (b->inserted)
- {
- if (b->mode == DIM)
- {
- val =adj_write_memory (b->act_addr[0], shadow0,
- INSTRUCTION_LENGTH);
- val =adj_write_memory (b->act_addr[1],shadow1,
- INSTRUCTION_LENGTH);
- if (b->address1 != NULL)
- {
- val =adj_write_memory (b->act_addr[2],shadow2,
- INSTRUCTION_LENGTH);
- val =adj_write_memory (b->act_addr[3], shadow3,
- INSTRUCTION_LENGTH);
- }
- }
- else
- {
- val =adj_write_memory (b->act_addr[0], shadow0,
- INSTRUCTION_LENGTH);
- if (b->address1 != NULL)
- {
- val =adj_write_memory (b->act_addr[2],shadow0,
- INSTRUCTION_LENGTH);
- }
- }
- if (val != 0)
- return val;
- b->inserted = 0;
- }
-
- return 0;
-
-
-}
-
-
-#ifdef USE_PROC_FS /* Target dependent support for /proc */
-
-#include <sys/procfs.h>
-
-/* The following routines were added by Peggy Fieland (Margaret_Fieland@vos.stratus.com)
-They were adapted from the m-68k versions of the routines .*/
-
-/* Given a pointer to a floating point register set in /proc format
- (fpregset_t *), unpack the register contents and supply them as gdb's
- idea of the current floating point register values. */
-
-void
-supply_fpregset (fpregsetp)
-fpregset_t *fpregsetp;
-{
- register int regno;
-
- BTDEBUG("supply_fregset called \n");
-
- for (regno = F0 ; regno <= F31 ; regno++)
- {
- supply_register (regno, (char *) &(fpregsetp -> fpu.r_freg[regno-F0]));
- }
-}
-
-/* Given a pointer to a floating point register set in /proc format
- (fpregset_t *), update the register specified by REGNO from gdb's idea
- of the current floating point register set. If REGNO is -1, update
- them all. */
-
-void
-fill_fpregset (fpregsetp, regno)
-fpregset_t *fpregsetp;
-int regno;
-{
- int regi;
- char *to;
- char *from;
- extern char registers[];
- BTDEBUG("fill_fregset regno %d\n",regno);
-
- for (regi = F0 ; regi <= F31 ; regi++)
- {
- if ((regno == -1) || (regno == regi))
- {
- from = (char *) ®isters[REGISTER_BYTE (regi)];
- to = (char *) &(fpregsetp -> fpu.r_freg[regi-F0]);
- bcopy (from, to, REGISTER_RAW_SIZE (regno));
- }
- }
-}
-
-
-/* Given a pointer to a general register set in /proc format (gregset_t *),
- unpack the register contents and supply them as gdb's idea of the current
- register values. */
-
-void
-supply_gregset (gregsetp)
-gregset_t *gregsetp;
-{
- register int regno;
- register greg_t *regp = (greg_t *) gregsetp;
-
- BTDEBUG("supply_gregset called \n");
-
- for (regno = 0 ; regno <= R31 ; regno++)
- {
- supply_register (regno, (char *) (regp + regno));
- }
-}
-
-/* Given a pointer to a general register set in /proc format (gregset_t *),
- update the register specified by REGNO from gdb's idea
- of the current general register set. If REGNO is -1, update
- them all. */
-
-void
-fill_gregset (gregsetp, regno)
-gregset_t *gregsetp;
-int regno;
-{
- int regi;
- extern char registers[];
- register greg_t *regp = (greg_t *) gregsetp;
- BTDEBUG("fill_gregset regno %d \n",regno);
-
- for (regi = 0 ; regi <= R31 ; regi++)
- {
- if ((regno == -1) || (regno == regi))
- {
- *(regp + regi) = *(int *) ®isters[REGISTER_BYTE (regi)];
- }
-
- }
-}
-#endif
-
-
-/* Push an empty stack frame, to record the current PC, etc. */
-/* We have this frame with fp pointing to a block where all GDB-visible
- registers are stored in the order GDB knows them, and sp at the next
- alignment point below fp. Note: fp + NUM_REGS*4 was the old sp
- */
-extern CORE_ADDR text_end;
-CORE_ADDR dummy_start_addr;
-void i860_push_frame()
-{
- register CORE_ADDR old_fp = read_register(FP_REGNUM);
- register CORE_ADDR old_sp = read_register(SP_REGNUM);
- register CORE_ADDR fp ;
- extern char registers[];
-
- fp = old_sp - REGISTER_BYTES;
- write_memory(fp, registers, REGISTER_BYTES); /* write out old register values */
- /* reset FP and SP */
- write_register(FP_REGNUM, fp);
- write_register(SP_REGNUM, (fp &~ 15)); /* re-align */
- call_dummy_set = 1;
-}
-/* Discard from the stack the innermost frame,
- restoring all saved registers. */
-
-void i860_pop_frame()
-{ register FRAME frame = get_current_frame ();
- register CORE_ADDR fp;
- struct frame_info *fi;
- int i;
-
- fi = get_frame_info (frame);
- fp = fi->frame;
-
- if (call_dummy_set && fi -> pc >= call_dummy_start &&
- fi -> pc <= call_dummy_start + CALL_DUMMY_LENGTH)
- {
-
- read_memory(fp, registers, REGISTER_BYTES);
-
- target_store_registers(-1);
-
- {
- /* since we stomped on code that will be executed when we exit the program,
- restore it. */
- extern REGISTER_TYPE call_save_code[4];
-
- write_memory (call_dummy_start, (char *) call_save_code, 16);
-
- }
- call_dummy_set = 0;
- }
- else
- {
- register int regnum;
- struct frame_saved_regs fsr;
- char raw_buffer[12];
-
- get_frame_saved_regs (fi, &fsr);
- for (regnum = FP0_REGNUM + 31; regnum >= FP0_REGNUM; regnum--)
- if (fsr.regs[regnum])
- write_register (regnum, read_memory_integer (fsr.regs[regnum], 4));
- for (regnum = R31; regnum >= 1; regnum--)
- if (fsr.regs[regnum])
- if (regnum != SP_REGNUM)
- write_register (regnum, read_memory_integer (fsr.regs[regnum], 4));
- else
- write_register (SP_REGNUM, fsr.regs[SP_REGNUM]);
- if (fsr.regs[PS_REGNUM])
- write_register (PS_REGNUM, read_memory_integer (fsr.regs[PS_REGNUM], 4));
- if (fsr.regs[FPS_REGNUM])
- write_register (FPS_REGNUM, read_memory_integer (fsr.regs[FPS_REGNUM],4));
- if (fsr.regs[PC_REGNUM])
- write_register (PC_REGNUM,CLEAN_PC( read_memory_integer (fsr.regs[PC_REGNUM], 4)));
- }
-
- flush_cached_frames ();
-
- set_current_frame (create_new_frame (read_register (FP_REGNUM),
- read_pc ()));
-
-}
-
-CORE_ADDR i860_arg_coerce(nargs, args, struct_return, sp)
- int nargs;
- value *args;
- int struct_return;
- CORE_ADDR sp;
-{
-
- register int scalar;
- register enum type_code code2;
- register struct type *type;
- int i;
- value arg;
- int num_int_args = 0;
- int num_float_args = 0;
- int size = 0;
- CORE_ADDR arg_ptr;
-
- /* if we return a structure, it's address is in R16, and thus it uses up one of the integer
- argument registers. See the ABI. */
- if (struct_return)
- num_int_args += 1;
-
- /* loop to do the right thing with all the arguments and calculate the size of the memory
- argument list. We keep count of the number of integer and the number of float parameters,
- as well as the size of the memory argument list. */
-
- for (i = 0; i < nargs; i++)
- {
-
- /* NOTE that this is all hunky dory in spite of the fact that we don't actually
- have the signature of the called procedure EXCEPT if we are passing in floats!
- This is true, since registers are 4 bytes, and the minimum alignment in the
- memory argument list is 4 bytes. See the ABI for more gory details. The switch
- "ansi-conformant" is an attempt to get around this problem. */
-
- code2 = TYPE_CODE (VALUE_TYPE(args[i]));
-
- /* Only coerce if we've got switch "ansi-conformant" off.
- Actually, it's OK ( and probably helpful) to coerce ALL integer arguments
- (see comment above), but never mind, we make them the right size in
- pass_function_arguments. */
-
- if ((!ansi_conformant) && (code2 != TYPE_CODE_STRUCT))
- value_arg_coerce(args[i]);
-
- arg = args[i];
- type = VALUE_TYPE(args[i]);
-
- /* All structures are passed by value in the memory argument list. */
- if (code2 == TYPE_CODE_STRUCT)
- {
- size = ALIGN_ARG(size, sizeof(long));
- size += TYPE_LENGTH(type);
- }
- else if (type == builtin_type_float)
- {
- num_float_args += 1;
- if (num_float_args > NUM_FLOAT_ARG_REGS)
- {
- size = ALIGN_ARG(size, TYPE_LENGTH(type)) ;
- size += TYPE_LENGTH(type);
- }
- }
- else if (type == builtin_type_double)
- {
- /* floating register alignment -- see ABI */
- if ((num_float_args%2) != 0)
- num_float_args += 1;
-
- num_float_args += 2; /* use up two registers */
-
- if (num_float_args > NUM_FLOAT_ARG_REGS)
- {
- size = ALIGN_ARG(size, TYPE_LENGTH(type)) ;
- size += TYPE_LENGTH(type);
- }
- }
- else
- {
- int len = max (sizeof(long), TYPE_LENGTH(type));
-
- num_int_args += 1;
-
- if (num_int_args > NUM_INT_ARG_REGS)
- {
- /* see ABI -- in-memory arguments have AT LEAST word alignment */
- if ((TYPE_CODE(type) == TYPE_CODE_INT) ||
- (TYPE_CODE(type) == TYPE_CODE_ENUM) ||
- (TYPE_CODE(type) == TYPE_CODE_CHAR) ||
- (TYPE_CODE(type) == TYPE_CODE_BOOL))
- size = ALIGN_ARG(size, len);
- else
- size = ALIGN_ARG(size, sizeof(long));
- size += len;
- }
- }
-
- }
-
-
- /* recalculate the stack pointer, leaving enough space for the memory argument list and
- realigning the stack pointer. */
- if (size != 0)
- {
- arg_ptr = sp - size;
-
- arg_ptr = arg_ptr & (-16); /* realign stack */
- write_register (R28,arg_ptr);
- sp = arg_ptr;
- }
-
-return (sp);
-
-}
-void i860_extract_return_value(type,regbuf,valbuf)
-struct type *type;
-char regbuf[REGISTER_BYTES];
-char *valbuf;
-{
- register int len = TYPE_LENGTH (type);
- double tmp_db;
- float tmp_flt;
-
- if ((TYPE_CODE(type) == TYPE_CODE_FLT))
- {
- if (len == sizeof (float))
- {
- /* FIXME
- NOTE that this assumes that the function declaration was ANSI_CONFORMANT --
- at the present time I can't think of ANY WAY to disambiguate the two following
- cases:
- float really_does_return_a_float(float ff)
- { ...}
- and
- float actually_returns_a_double(ff)
- float ff;
- {...}
- */
- bcopy ((char *) (regbuf) + REGISTER_BYTE(ADJ_FREG(F8)), (valbuf), TYPE_LENGTH (type)) ;
- }
- else
- bcopy ((char *) (regbuf) + REGISTER_BYTE(F8), (valbuf), TYPE_LENGTH (type)) ;
- }
- else
- bcopy ((char *) (regbuf) + REGISTER_BYTE(R16), (valbuf), TYPE_LENGTH (type));
-
-}
-void i860_store_return_value(type,valbuf)
-struct type *type;
-char *valbuf;
-{
- register int len = TYPE_LENGTH (type);
- double tmp_db;
-
- if ((TYPE_CODE(type) == TYPE_CODE_FLT) )
- {
- write_register_bytes (REGISTER_BYTE (F8), valbuf, len);
- }
- else
- write_register_bytes (REGISTER_BYTE (R16), valbuf, TYPE_LENGTH (type));
-
-}
-
projects / deliverable / binutils-gdb.git / blobdiff