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1291 lines
26 KiB
C
1291 lines
26 KiB
C
/* Simulator for the Hitachi SH architecture.
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Written by Steve Chamberlain of Cygnus Support.
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sac@cygnus.com
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This file is part of SH sim
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THIS SOFTWARE IS NOT COPYRIGHTED
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Cygnus offers the following for use in the public domain. Cygnus
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makes no warranty with regard to the software or it's performance
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and the user accepts the software "AS IS" with all faults.
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CYGNUS DISCLAIMS ANY WARRANTIES, EXPRESS OR IMPLIED, WITH REGARD TO
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THIS SOFTWARE INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#include "config.h"
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#include <signal.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include "sysdep.h"
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#include "bfd.h"
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#include "callback.h"
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#include "remote-sim.h"
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/* This file is local - if newlib changes, then so should this. */
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#include "syscall.h"
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#include <math.h>
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#ifdef _WIN32
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#include <float.h> /* Needed for _isnan() */
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#define isnan _isnan
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#endif
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#ifndef SIGBUS
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#define SIGBUS SIGSEGV
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#endif
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#ifndef SIGQUIT
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#define SIGQUIT SIGTERM
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#endif
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#ifndef SIGTRAP
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#define SIGTRAP 5
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#endif
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#define O_RECOMPILE 85
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#define DEFINE_TABLE
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#define DISASSEMBLER_TABLE
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#define SBIT(x) ((x)&sbit)
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#define R0 saved_state.asregs.regs[0]
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#define Rn saved_state.asregs.regs[n]
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#define Rm saved_state.asregs.regs[m]
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#define UR0 (unsigned int)(saved_state.asregs.regs[0])
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#define UR (unsigned int)R
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#define UR (unsigned int)R
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#define SR0 saved_state.asregs.regs[0]
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#define GBR saved_state.asregs.gbr
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#define VBR saved_state.asregs.vbr
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#define SSR saved_state.asregs.ssr
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#define SPC saved_state.asregs.spc
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#define MACH saved_state.asregs.mach
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#define MACL saved_state.asregs.macl
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#define M saved_state.asregs.sr.bits.m
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#define Q saved_state.asregs.sr.bits.q
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#define S saved_state.asregs.sr.bits.s
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#define FPSCR saved_state.asregs.fpscr
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#define FPUL saved_state.asregs.fpul
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#define GET_SR() (saved_state.asregs.sr.bits.t = T, saved_state.asregs.sr.word)
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#define SET_SR(x) {saved_state.asregs.sr.word = (x); T =saved_state.asregs.sr.bits.t;}
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#define PC pc
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#define C cycles
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static SIM_OPEN_KIND sim_kind;
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static char *myname;
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static int little_endian_p;
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int
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fail ()
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{
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abort ();
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}
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/* This function exists solely for the purpose of setting a breakpoint to
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catch simulated bus errors when running the simulator under GDB. */
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void
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bp_holder ()
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{
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}
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#define BUSERROR(addr, mask) \
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if (addr & ~mask) { saved_state.asregs.exception = SIGBUS; bp_holder (); }
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/* Define this to enable register lifetime checking.
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The compiler generates "add #0,rn" insns to mark registers as invalid,
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the simulator uses this info to call fail if it finds a ref to an invalid
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register before a def
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#define PARANOID
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*/
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#ifdef PARANOID
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int valid[16];
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#define CREF(x) if(!valid[x]) fail();
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#define CDEF(x) valid[x] = 1;
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#define UNDEF(x) valid[x] = 0;
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#else
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#define CREF(x)
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#define CDEF(x)
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#define UNDEF(x)
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#endif
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static void parse_and_set_memory_size PARAMS ((char *str));
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static int IOMEM PARAMS ((int addr, int write, int value));
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static host_callback *callback;
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/* These variables are at file scope so that functions other than
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sim_resume can use the fetch/store macros */
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static int little_endian;
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#if 1
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static int maskl = ~0;
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static int maskw = ~0;
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#endif
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typedef union
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{
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struct
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{
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int regs[16];
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int pc;
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int pr;
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int gbr;
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int vbr;
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int mach;
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int macl;
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union
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{
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struct
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{
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unsigned int d0:22;
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unsigned int m:1;
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unsigned int q:1;
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unsigned int i:4;
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unsigned int d1:2;
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unsigned int s:1;
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unsigned int t:1;
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}
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bits;
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int word;
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}
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sr;
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int fpul;
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float fpscr;
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float fregs[16];
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int ssr;
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int spc;
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int bregs[16];
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int ticks;
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int stalls;
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int memstalls;
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int cycles;
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int insts;
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int prevlock;
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int thislock;
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int exception;
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int msize;
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#define PROFILE_FREQ 1
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#define PROFILE_SHIFT 2
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int profile;
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unsigned short *profile_hist;
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unsigned char *memory;
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}
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asregs;
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int asints[28];
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} saved_state_type;
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saved_state_type saved_state;
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static void INLINE
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wlat_little (memory, x, value, maskl)
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unsigned char *memory;
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{
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int v = value;
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unsigned char *p = memory + ((x) & maskl);
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BUSERROR(x, maskl);
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p[3] = v >> 24;
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p[2] = v >> 16;
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p[1] = v >> 8;
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p[0] = v;
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}
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static void INLINE
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wwat_little (memory, x, value, maskw)
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unsigned char *memory;
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{
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int v = value;
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unsigned char *p = memory + ((x) & maskw);
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BUSERROR(x, maskw);
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p[1] = v >> 8;
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p[0] = v;
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}
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static void INLINE
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wbat_any (memory, x, value, maskb)
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unsigned char *memory;
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{
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unsigned char *p = memory + (x & maskb);
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if (x > 0x5000000)
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IOMEM (x, 1, value);
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BUSERROR(x, maskb);
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p[0] = value;
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}
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static void INLINE
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wlat_big (memory, x, value, maskl)
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unsigned char *memory;
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{
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int v = value;
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unsigned char *p = memory + ((x) & maskl);
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BUSERROR(x, maskl);
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p[0] = v >> 24;
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p[1] = v >> 16;
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p[2] = v >> 8;
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p[3] = v;
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}
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static void INLINE
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wwat_big (memory, x, value, maskw)
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unsigned char *memory;
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{
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int v = value;
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unsigned char *p = memory + ((x) & maskw);
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BUSERROR(x, maskw);
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p[0] = v >> 8;
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p[1] = v;
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}
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static void INLINE
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wbat_big (memory, x, value, maskb)
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unsigned char *memory;
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{
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unsigned char *p = memory + (x & maskb);
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BUSERROR(x, maskb);
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if (x > 0x5000000)
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IOMEM (x, 1, value);
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p[0] = value;
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}
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/* Read functions */
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static int INLINE
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rlat_little (memory, x, maskl)
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unsigned char *memory;
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{
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unsigned char *p = memory + ((x) & maskl);
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BUSERROR(x, maskl);
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return (p[3] << 24) | (p[2] << 16) | (p[1] << 8) | p[0];
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}
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static int INLINE
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rwat_little (memory, x, maskw)
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unsigned char *memory;
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{
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unsigned char *p = memory + ((x) & maskw);
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BUSERROR(x, maskw);
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return (p[1] << 8) | p[0];
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}
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static int INLINE
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rbat_any (memory, x, maskb)
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unsigned char *memory;
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{
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unsigned char *p = memory + ((x) & maskb);
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BUSERROR(x, maskb);
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return p[0];
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}
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static int INLINE
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rlat_big (memory, x, maskl)
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unsigned char *memory;
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{
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unsigned char *p = memory + ((x) & maskl);
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BUSERROR(x, maskl);
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return (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3];
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}
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static int INLINE
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rwat_big (memory, x, maskw)
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unsigned char *memory;
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{
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unsigned char *p = memory + ((x) & maskw);
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BUSERROR(x, maskw);
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return (p[0] << 8) | p[1];
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}
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#define RWAT(x) (little_endian ? rwat_little(memory, x, maskw): rwat_big(memory, x, maskw))
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#define RLAT(x) (little_endian ? rlat_little(memory, x, maskl): rlat_big(memory, x, maskl))
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#define RBAT(x) (rbat_any (memory, x, maskb))
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#define WWAT(x,v) (little_endian ? wwat_little(memory, x, v, maskw): wwat_big(memory, x, v, maskw))
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#define WLAT(x,v) (little_endian ? wlat_little(memory, x, v, maskl): wlat_big(memory, x, v, maskl))
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#define WBAT(x,v) (wbat_any (memory, x, v, maskb))
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#define RUWAT(x) (RWAT(x) & 0xffff)
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#define RSWAT(x) ((short)(RWAT(x)))
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#define RSBAT(x) (SEXT(RBAT(x)))
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#define MA() ((pc & 3) != 0 ? ++memstalls : 0)
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#define SEXT(x) (((x&0xff) ^ (~0x7f))+0x80)
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#define SEXTW(y) ((int)((short)y))
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#define SL(TEMPPC) iword= RUWAT(TEMPPC); goto top;
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int empty[16];
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#define L(x) thislock = x;
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#define TL(x) if ((x) == prevlock) stalls++;
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#define TB(x,y) if ((x) == prevlock || (y)==prevlock) stalls++;
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#if defined(__GO32__) || defined(_WIN32)
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int sim_memory_size = 19;
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#else
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int sim_memory_size = 24;
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#endif
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static int sim_profile_size = 17;
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static int nsamples;
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#undef TB
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#define TB(x,y)
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#define SMR1 (0x05FFFEC8) /* Channel 1 serial mode register */
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#define BRR1 (0x05FFFEC9) /* Channel 1 bit rate register */
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#define SCR1 (0x05FFFECA) /* Channel 1 serial control register */
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#define TDR1 (0x05FFFECB) /* Channel 1 transmit data register */
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#define SSR1 (0x05FFFECC) /* Channel 1 serial status register */
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#define RDR1 (0x05FFFECD) /* Channel 1 receive data register */
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#define SCI_RDRF 0x40 /* Recieve data register full */
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#define SCI_TDRE 0x80 /* Transmit data register empty */
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static int
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IOMEM (addr, write, value)
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int addr;
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int write;
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int value;
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{
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if (write)
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{
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switch (addr)
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{
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case TDR1:
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if (value != '\r')
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{
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putchar (value);
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fflush (stdout);
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}
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break;
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}
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}
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else
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{
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switch (addr)
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{
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case RDR1:
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return getchar ();
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}
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}
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return 0;
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}
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static int
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get_now ()
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{
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return time ((long *) 0);
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}
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static int
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now_persec ()
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{
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return 1;
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}
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static FILE *profile_file;
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static void
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swap (memory, n)
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unsigned char *memory;
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int n;
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{
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WLAT (0, n);
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}
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static void
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swap16 (memory, n)
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unsigned char *memory;
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int n;
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{
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WWAT (0, n);
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}
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static void
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swapout (n)
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int n;
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{
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if (profile_file)
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{
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char b[4];
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swap (b, n);
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fwrite (b, 4, 1, profile_file);
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}
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}
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static void
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swapout16 (n)
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int n;
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{
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char b[4];
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swap16 (b, n);
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fwrite (b, 2, 1, profile_file);
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}
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/* Turn a pointer in a register into a pointer into real memory. */
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static char *
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ptr (x)
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int x;
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{
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return (char *) (x + saved_state.asregs.memory);
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}
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/* Simulate a monitor trap, put the result into r0 and errno into r1 */
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static void
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trap (i, regs, memory, maskl, maskw, little_endian)
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int i;
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int *regs;
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unsigned char *memory;
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{
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switch (i)
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{
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case 1:
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printf ("%c", regs[0]);
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break;
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case 2:
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saved_state.asregs.exception = SIGQUIT;
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break;
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case 3: /* FIXME: for backwards compat, should be removed */
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case 34:
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{
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extern int errno;
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int perrno = errno;
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errno = 0;
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switch (regs[4])
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{
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#if !defined(__GO32__) && !defined(_WIN32)
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case SYS_fork:
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regs[0] = fork ();
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break;
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case SYS_execve:
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regs[0] = execve (ptr (regs[5]), (char **)ptr (regs[6]), (char **)ptr (regs[7]));
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break;
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case SYS_execv:
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regs[0] = execve (ptr (regs[5]),(char **) ptr (regs[6]), 0);
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break;
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case SYS_pipe:
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{
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char *buf;
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int host_fd[2];
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buf = ptr (regs[5]);
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regs[0] = pipe (host_fd);
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WLAT (buf, host_fd[0]);
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buf += 4;
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WLAT (buf, host_fd[1]);
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}
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break;
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case SYS_wait:
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regs[0] = wait (ptr (regs[5]));
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break;
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#endif
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case SYS_read:
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regs[0] = callback->read (callback, regs[5], ptr (regs[6]), regs[7]);
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break;
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case SYS_write:
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if (regs[5] == 1)
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regs[0] = (int)callback->write_stdout (callback, ptr(regs[6]), regs[7]);
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else
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regs[0] = (int)callback->write (callback, regs[5], ptr (regs[6]), regs[7]);
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break;
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case SYS_lseek:
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regs[0] = callback->lseek (callback,regs[5], regs[6], regs[7]);
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break;
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case SYS_close:
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regs[0] = callback->close (callback,regs[5]);
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break;
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case SYS_open:
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regs[0] = callback->open (callback,ptr (regs[5]), regs[6]);
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break;
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case SYS_exit:
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/* EXIT - caller can look in r5 to work out the reason */
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saved_state.asregs.exception = SIGQUIT;
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regs[0] = regs[5];
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break;
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case SYS_stat: /* added at hmsi */
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/* stat system call */
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{
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struct stat host_stat;
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char *buf;
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regs[0] = stat (ptr (regs[5]), &host_stat);
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buf = ptr (regs[6]);
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WWAT (buf, host_stat.st_dev);
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buf += 2;
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WWAT (buf, host_stat.st_ino);
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buf += 2;
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WLAT (buf, host_stat.st_mode);
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buf += 4;
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WWAT (buf, host_stat.st_nlink);
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buf += 2;
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WWAT (buf, host_stat.st_uid);
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buf += 2;
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WWAT (buf, host_stat.st_gid);
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buf += 2;
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WWAT (buf, host_stat.st_rdev);
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buf += 2;
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WLAT (buf, host_stat.st_size);
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buf += 4;
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WLAT (buf, host_stat.st_atime);
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buf += 4;
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WLAT (buf, 0);
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buf += 4;
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WLAT (buf, host_stat.st_mtime);
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buf += 4;
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WLAT (buf, 0);
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buf += 4;
|
|
WLAT (buf, host_stat.st_ctime);
|
|
buf += 4;
|
|
WLAT (buf, 0);
|
|
buf += 4;
|
|
WLAT (buf, 0);
|
|
buf += 4;
|
|
WLAT (buf, 0);
|
|
buf += 4;
|
|
}
|
|
break;
|
|
|
|
#ifndef _WIN32
|
|
case SYS_chown:
|
|
regs[0] = chown (ptr (regs[5]), regs[6], regs[7]);
|
|
break;
|
|
#endif /* _WIN32 */
|
|
case SYS_chmod:
|
|
regs[0] = chmod (ptr (regs[5]), regs[6]);
|
|
break;
|
|
case SYS_utime:
|
|
/* Cast the second argument to void *, to avoid type mismatch
|
|
if a prototype is present. */
|
|
regs[0] = utime (ptr (regs[5]), (void *) ptr (regs[6]));
|
|
break;
|
|
default:
|
|
abort ();
|
|
}
|
|
regs[1] = callback->get_errno (callback);
|
|
errno = perrno;
|
|
}
|
|
break;
|
|
|
|
case 0xc3:
|
|
case 255:
|
|
saved_state.asregs.exception = SIGTRAP;
|
|
break;
|
|
}
|
|
|
|
}
|
|
|
|
void
|
|
control_c (sig, code, scp, addr)
|
|
int sig;
|
|
int code;
|
|
char *scp;
|
|
char *addr;
|
|
{
|
|
saved_state.asregs.exception = SIGINT;
|
|
}
|
|
|
|
static int
|
|
div1 (R, iRn2, iRn1, T)
|
|
int *R;
|
|
int iRn1;
|
|
int iRn2;
|
|
int T;
|
|
{
|
|
unsigned long tmp0;
|
|
unsigned char old_q, tmp1;
|
|
|
|
old_q = Q;
|
|
Q = (unsigned char) ((0x80000000 & R[iRn1]) != 0);
|
|
R[iRn1] <<= 1;
|
|
R[iRn1] |= (unsigned long) T;
|
|
|
|
switch (old_q)
|
|
{
|
|
case 0:
|
|
switch (M)
|
|
{
|
|
case 0:
|
|
tmp0 = R[iRn1];
|
|
R[iRn1] -= R[iRn2];
|
|
tmp1 = (R[iRn1] > tmp0);
|
|
switch (Q)
|
|
{
|
|
case 0:
|
|
Q = tmp1;
|
|
break;
|
|
case 1:
|
|
Q = (unsigned char) (tmp1 == 0);
|
|
break;
|
|
}
|
|
break;
|
|
case 1:
|
|
tmp0 = R[iRn1];
|
|
R[iRn1] += R[iRn2];
|
|
tmp1 = (R[iRn1] < tmp0);
|
|
switch (Q)
|
|
{
|
|
case 0:
|
|
Q = (unsigned char) (tmp1 == 0);
|
|
break;
|
|
case 1:
|
|
Q = tmp1;
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
break;
|
|
case 1:
|
|
switch (M)
|
|
{
|
|
case 0:
|
|
tmp0 = R[iRn1];
|
|
R[iRn1] += R[iRn2];
|
|
tmp1 = (R[iRn1] < tmp0);
|
|
switch (Q)
|
|
{
|
|
case 0:
|
|
Q = tmp1;
|
|
break;
|
|
case 1:
|
|
Q = (unsigned char) (tmp1 == 0);
|
|
break;
|
|
}
|
|
break;
|
|
case 1:
|
|
tmp0 = R[iRn1];
|
|
R[iRn1] -= R[iRn2];
|
|
tmp1 = (R[iRn1] > tmp0);
|
|
switch (Q)
|
|
{
|
|
case 0:
|
|
Q = (unsigned char) (tmp1 == 0);
|
|
break;
|
|
case 1:
|
|
Q = tmp1;
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
T = (Q == M);
|
|
return T;
|
|
}
|
|
|
|
static void
|
|
dmul (sign, rm, rn)
|
|
int sign;
|
|
unsigned int rm;
|
|
unsigned int rn;
|
|
{
|
|
unsigned long RnL, RnH;
|
|
unsigned long RmL, RmH;
|
|
unsigned long temp0, temp1, temp2, temp3;
|
|
unsigned long Res2, Res1, Res0;
|
|
|
|
RnL = rn & 0xffff;
|
|
RnH = (rn >> 16) & 0xffff;
|
|
RmL = rm & 0xffff;
|
|
RmH = (rm >> 16) & 0xffff;
|
|
temp0 = RmL * RnL;
|
|
temp1 = RmH * RnL;
|
|
temp2 = RmL * RnH;
|
|
temp3 = RmH * RnH;
|
|
Res2 = 0;
|
|
Res1 = temp1 + temp2;
|
|
if (Res1 < temp1)
|
|
Res2 += 0x00010000;
|
|
temp1 = (Res1 << 16) & 0xffff0000;
|
|
Res0 = temp0 + temp1;
|
|
if (Res0 < temp0)
|
|
Res2 += 1;
|
|
Res2 += ((Res1 >> 16) & 0xffff) + temp3;
|
|
|
|
if (sign)
|
|
{
|
|
if (rn & 0x80000000)
|
|
Res2 -= rm;
|
|
if (rm & 0x80000000)
|
|
Res2 -= rn;
|
|
}
|
|
|
|
MACH = Res2;
|
|
MACL = Res0;
|
|
}
|
|
|
|
static void
|
|
macw (regs, memory, n, m)
|
|
int *regs;
|
|
unsigned char *memory;
|
|
int m, n;
|
|
{
|
|
long tempm, tempn;
|
|
long prod, macl, sum;
|
|
|
|
tempm=RSWAT(regs[m]); regs[m]+=2;
|
|
tempn=RSWAT(regs[n]); regs[n]+=2;
|
|
|
|
macl = MACL;
|
|
prod = (long)(short) tempm * (long)(short) tempn;
|
|
sum = prod + macl;
|
|
if (S)
|
|
{
|
|
if ((~(prod ^ macl) & (sum ^ prod)) < 0)
|
|
{
|
|
/* MACH's lsb is a sticky overflow bit. */
|
|
MACH |= 1;
|
|
/* Store the smallest negative number in MACL if prod is
|
|
negative, and the largest positive number otherwise. */
|
|
sum = 0x7fffffff + (prod < 0);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
long mach;
|
|
/* Add to MACH the sign extended product, and carry from low sum. */
|
|
mach = MACH + (-(prod < 0)) + ((unsigned long) sum < prod);
|
|
/* Sign extend at 10:th bit in MACH. */
|
|
MACH = (mach & 0x1ff) | -(mach & 0x200);
|
|
}
|
|
MACL = sum;
|
|
}
|
|
|
|
/* Set the memory size to the power of two provided. */
|
|
|
|
void
|
|
sim_size (power)
|
|
int power;
|
|
|
|
{
|
|
saved_state.asregs.msize = 1 << power;
|
|
|
|
sim_memory_size = power;
|
|
|
|
if (saved_state.asregs.memory)
|
|
{
|
|
free (saved_state.asregs.memory);
|
|
}
|
|
|
|
saved_state.asregs.memory =
|
|
(unsigned char *) calloc (64, saved_state.asregs.msize / 64);
|
|
|
|
if (!saved_state.asregs.memory)
|
|
{
|
|
fprintf (stderr,
|
|
"Not enough VM for simulation of %d bytes of RAM\n",
|
|
saved_state.asregs.msize);
|
|
|
|
saved_state.asregs.msize = 1;
|
|
saved_state.asregs.memory = (unsigned char *) calloc (1, 1);
|
|
}
|
|
}
|
|
|
|
static void
|
|
set_static_little_endian (x)
|
|
int x;
|
|
{
|
|
little_endian = x;
|
|
}
|
|
|
|
static void
|
|
init_pointers ()
|
|
{
|
|
int little_endian = little_endian_p;
|
|
|
|
set_static_little_endian (little_endian);
|
|
|
|
if (saved_state.asregs.msize != 1 << sim_memory_size)
|
|
{
|
|
sim_size (sim_memory_size);
|
|
}
|
|
|
|
if (saved_state.asregs.profile && !profile_file)
|
|
{
|
|
profile_file = fopen ("gmon.out", "wb");
|
|
/* Seek to where to put the call arc data */
|
|
nsamples = (1 << sim_profile_size);
|
|
|
|
fseek (profile_file, nsamples * 2 + 12, 0);
|
|
|
|
if (!profile_file)
|
|
{
|
|
fprintf (stderr, "Can't open gmon.out\n");
|
|
}
|
|
else
|
|
{
|
|
saved_state.asregs.profile_hist =
|
|
(unsigned short *) calloc (64, (nsamples * sizeof (short) / 64));
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
dump_profile ()
|
|
{
|
|
unsigned int minpc;
|
|
unsigned int maxpc;
|
|
unsigned short *p;
|
|
int i;
|
|
|
|
p = saved_state.asregs.profile_hist;
|
|
minpc = 0;
|
|
maxpc = (1 << sim_profile_size);
|
|
|
|
fseek (profile_file, 0L, 0);
|
|
swapout (minpc << PROFILE_SHIFT);
|
|
swapout (maxpc << PROFILE_SHIFT);
|
|
swapout (nsamples * 2 + 12);
|
|
for (i = 0; i < nsamples; i++)
|
|
swapout16 (saved_state.asregs.profile_hist[i]);
|
|
|
|
}
|
|
|
|
static void
|
|
gotcall (from, to)
|
|
int from;
|
|
int to;
|
|
{
|
|
swapout (from);
|
|
swapout (to);
|
|
swapout (1);
|
|
}
|
|
|
|
#define MMASKB ((saved_state.asregs.msize -1) & ~0)
|
|
|
|
int
|
|
sim_stop (sd)
|
|
SIM_DESC sd;
|
|
{
|
|
saved_state.asregs.exception = SIGINT;
|
|
return 1;
|
|
}
|
|
|
|
void
|
|
sim_resume (sd, step, siggnal)
|
|
SIM_DESC sd;
|
|
int step, siggnal;
|
|
{
|
|
register unsigned int pc;
|
|
register int cycles = 0;
|
|
register int stalls = 0;
|
|
register int memstalls = 0;
|
|
register int insts = 0;
|
|
register int prevlock;
|
|
register int thislock;
|
|
register unsigned int doprofile;
|
|
register int pollcount = 0;
|
|
register int little_endian = little_endian_p;
|
|
|
|
int tick_start = get_now ();
|
|
void (*prev) ();
|
|
extern unsigned char sh_jump_table0[];
|
|
|
|
register unsigned char *jump_table = sh_jump_table0;
|
|
|
|
register int *R = &(saved_state.asregs.regs[0]);
|
|
register float *F = &(saved_state.asregs.fregs[0]);
|
|
register int T;
|
|
register int PR;
|
|
|
|
register int maskb = ((saved_state.asregs.msize - 1) & ~0);
|
|
register int maskw = ((saved_state.asregs.msize - 1) & ~1);
|
|
register int maskl = ((saved_state.asregs.msize - 1) & ~3);
|
|
register unsigned char *memory;
|
|
register unsigned int sbit = ((unsigned int) 1 << 31);
|
|
|
|
prev = signal (SIGINT, control_c);
|
|
|
|
init_pointers ();
|
|
|
|
memory = saved_state.asregs.memory;
|
|
|
|
if (step)
|
|
{
|
|
saved_state.asregs.exception = SIGTRAP;
|
|
}
|
|
else
|
|
{
|
|
saved_state.asregs.exception = 0;
|
|
}
|
|
|
|
pc = saved_state.asregs.pc;
|
|
PR = saved_state.asregs.pr;
|
|
T = saved_state.asregs.sr.bits.t;
|
|
prevlock = saved_state.asregs.prevlock;
|
|
thislock = saved_state.asregs.thislock;
|
|
doprofile = saved_state.asregs.profile;
|
|
|
|
/* If profiling not enabled, disable it by asking for
|
|
profiles infrequently. */
|
|
if (doprofile == 0)
|
|
doprofile = ~0;
|
|
|
|
do
|
|
{
|
|
register unsigned int iword = RUWAT (pc);
|
|
register unsigned int ult;
|
|
#ifndef ACE_FAST
|
|
insts++;
|
|
#endif
|
|
top:
|
|
|
|
#include "code.c"
|
|
|
|
|
|
pc += 2;
|
|
|
|
pollcount++;
|
|
if (pollcount > 1000)
|
|
{
|
|
pollcount = 0;
|
|
if ((*callback->poll_quit) != NULL
|
|
&& (*callback->poll_quit) (callback))
|
|
{
|
|
sim_stop (sd);
|
|
}
|
|
}
|
|
|
|
#ifndef ACE_FAST
|
|
prevlock = thislock;
|
|
thislock = 30;
|
|
cycles++;
|
|
|
|
if (cycles >= doprofile)
|
|
{
|
|
|
|
saved_state.asregs.cycles += doprofile;
|
|
cycles -= doprofile;
|
|
if (saved_state.asregs.profile_hist)
|
|
{
|
|
int n = pc >> PROFILE_SHIFT;
|
|
if (n < nsamples)
|
|
{
|
|
int i = saved_state.asregs.profile_hist[n];
|
|
if (i < 65000)
|
|
saved_state.asregs.profile_hist[n] = i + 1;
|
|
}
|
|
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
while (!saved_state.asregs.exception);
|
|
|
|
if (saved_state.asregs.exception == SIGILL
|
|
|| saved_state.asregs.exception == SIGBUS)
|
|
{
|
|
pc -= 2;
|
|
}
|
|
|
|
saved_state.asregs.ticks += get_now () - tick_start;
|
|
saved_state.asregs.cycles += cycles;
|
|
saved_state.asregs.stalls += stalls;
|
|
saved_state.asregs.memstalls += memstalls;
|
|
saved_state.asregs.insts += insts;
|
|
saved_state.asregs.pc = pc;
|
|
saved_state.asregs.sr.bits.t = T;
|
|
saved_state.asregs.pr = PR;
|
|
|
|
saved_state.asregs.prevlock = prevlock;
|
|
saved_state.asregs.thislock = thislock;
|
|
|
|
if (profile_file)
|
|
{
|
|
dump_profile ();
|
|
}
|
|
|
|
signal (SIGINT, prev);
|
|
}
|
|
|
|
int
|
|
sim_write (sd, addr, buffer, size)
|
|
SIM_DESC sd;
|
|
SIM_ADDR addr;
|
|
unsigned char *buffer;
|
|
int size;
|
|
{
|
|
int i;
|
|
|
|
init_pointers ();
|
|
|
|
for (i = 0; i < size; i++)
|
|
{
|
|
saved_state.asregs.memory[MMASKB & (addr + i)] = buffer[i];
|
|
}
|
|
return size;
|
|
}
|
|
|
|
int
|
|
sim_read (sd, addr, buffer, size)
|
|
SIM_DESC sd;
|
|
SIM_ADDR addr;
|
|
unsigned char *buffer;
|
|
int size;
|
|
{
|
|
int i;
|
|
|
|
init_pointers ();
|
|
|
|
for (i = 0; i < size; i++)
|
|
{
|
|
buffer[i] = saved_state.asregs.memory[MMASKB & (addr + i)];
|
|
}
|
|
return size;
|
|
}
|
|
|
|
void
|
|
sim_store_register (sd, rn, memory)
|
|
SIM_DESC sd;
|
|
int rn;
|
|
unsigned char *memory;
|
|
{
|
|
init_pointers ();
|
|
saved_state.asregs.regs[rn] = RLAT(0);
|
|
}
|
|
|
|
void
|
|
sim_fetch_register (sd, rn, memory)
|
|
SIM_DESC sd;
|
|
int rn;
|
|
unsigned char *memory;
|
|
{
|
|
init_pointers ();
|
|
WLAT (0, saved_state.asregs.regs[rn]);
|
|
}
|
|
|
|
int
|
|
sim_trace (sd)
|
|
SIM_DESC sd;
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
sim_stop_reason (sd, reason, sigrc)
|
|
SIM_DESC sd;
|
|
enum sim_stop *reason;
|
|
int *sigrc;
|
|
{
|
|
/* The SH simulator uses SIGQUIT to indicate that the program has
|
|
exited, so we must check for it here and translate it to exit. */
|
|
if (saved_state.asregs.exception == SIGQUIT)
|
|
{
|
|
*reason = sim_exited;
|
|
*sigrc = saved_state.asregs.regs[5];
|
|
}
|
|
else
|
|
{
|
|
*reason = sim_stopped;
|
|
*sigrc = saved_state.asregs.exception;
|
|
}
|
|
}
|
|
|
|
void
|
|
sim_info (sd, verbose)
|
|
SIM_DESC sd;
|
|
int verbose;
|
|
{
|
|
double timetaken = (double) saved_state.asregs.ticks / (double) now_persec ();
|
|
double virttime = saved_state.asregs.cycles / 36.0e6;
|
|
|
|
callback->printf_filtered (callback, "\n\n# instructions executed %10d\n",
|
|
saved_state.asregs.insts);
|
|
callback->printf_filtered (callback, "# cycles %10d\n",
|
|
saved_state.asregs.cycles);
|
|
callback->printf_filtered (callback, "# pipeline stalls %10d\n",
|
|
saved_state.asregs.stalls);
|
|
callback->printf_filtered (callback, "# misaligned load/store %10d\n",
|
|
saved_state.asregs.memstalls);
|
|
callback->printf_filtered (callback, "# real time taken %10.4f\n",
|
|
timetaken);
|
|
callback->printf_filtered (callback, "# virtual time taken %10.4f\n",
|
|
virttime);
|
|
callback->printf_filtered (callback, "# profiling size %10d\n",
|
|
sim_profile_size);
|
|
callback->printf_filtered (callback, "# profiling frequency %10d\n",
|
|
saved_state.asregs.profile);
|
|
callback->printf_filtered (callback, "# profile maxpc %10x\n",
|
|
(1 << sim_profile_size) << PROFILE_SHIFT);
|
|
|
|
if (timetaken != 0)
|
|
{
|
|
callback->printf_filtered (callback, "# cycles/second %10d\n",
|
|
(int) (saved_state.asregs.cycles / timetaken));
|
|
callback->printf_filtered (callback, "# simulation ratio %10.4f\n",
|
|
virttime / timetaken);
|
|
}
|
|
}
|
|
|
|
void
|
|
sim_set_profile (n)
|
|
int n;
|
|
{
|
|
saved_state.asregs.profile = n;
|
|
}
|
|
|
|
void
|
|
sim_set_profile_size (n)
|
|
int n;
|
|
{
|
|
sim_profile_size = n;
|
|
}
|
|
|
|
SIM_DESC
|
|
sim_open (kind,argv)
|
|
SIM_OPEN_KIND kind;
|
|
char **argv;
|
|
{
|
|
char **p;
|
|
|
|
sim_kind = kind;
|
|
myname = argv[0];
|
|
|
|
for (p = argv + 1; *p != NULL; ++p)
|
|
{
|
|
if (strcmp (*p, "-E") == 0)
|
|
little_endian_p = strcmp (*++p, "big") != 0;
|
|
else if (isdigit (**p))
|
|
parse_and_set_memory_size (*p);
|
|
}
|
|
|
|
/* fudge our descriptor for now */
|
|
return (SIM_DESC) 1;
|
|
}
|
|
|
|
static void
|
|
parse_and_set_memory_size (str)
|
|
char *str;
|
|
{
|
|
int n;
|
|
|
|
n = strtol (str, NULL, 10);
|
|
if (n > 0 && n <= 24)
|
|
sim_memory_size = n;
|
|
else
|
|
callback->printf_filtered (callback, "Bad memory size %d; must be 1 to 24, inclusive\n", n);
|
|
}
|
|
|
|
void
|
|
sim_close (sd, quitting)
|
|
SIM_DESC sd;
|
|
int quitting;
|
|
{
|
|
/* nothing to do */
|
|
}
|
|
|
|
SIM_RC
|
|
sim_load (sd, prog, abfd, from_tty)
|
|
SIM_DESC sd;
|
|
char *prog;
|
|
bfd *abfd;
|
|
int from_tty;
|
|
{
|
|
extern bfd *sim_load_file (); /* ??? Don't know where this should live. */
|
|
bfd *prog_bfd;
|
|
|
|
prog_bfd = sim_load_file (sd, myname, callback, prog, abfd,
|
|
sim_kind == SIM_OPEN_DEBUG);
|
|
if (prog_bfd == NULL)
|
|
return SIM_RC_FAIL;
|
|
saved_state.asregs.pc = bfd_get_start_address (prog_bfd);
|
|
if (abfd == NULL)
|
|
bfd_close (prog_bfd);
|
|
return SIM_RC_OK;
|
|
}
|
|
|
|
SIM_RC
|
|
sim_create_inferior (sd, argv, env)
|
|
SIM_DESC sd;
|
|
char **argv;
|
|
char **env;
|
|
{
|
|
return SIM_RC_OK;
|
|
}
|
|
|
|
void
|
|
sim_kill (sd)
|
|
SIM_DESC sd;
|
|
{
|
|
/* nothing to do */
|
|
}
|
|
|
|
void
|
|
sim_do_command (sd, cmd)
|
|
SIM_DESC sd;
|
|
char *cmd;
|
|
{
|
|
char *sms_cmd = "set-memory-size";
|
|
int cmdsize;
|
|
|
|
if (cmd == NULL || *cmd == '\0')
|
|
{
|
|
cmd = "help";
|
|
}
|
|
|
|
cmdsize = strlen (sms_cmd);
|
|
if (strncmp (cmd, sms_cmd, cmdsize) == 0 && strchr (" \t", cmd[cmdsize]) != NULL)
|
|
{
|
|
parse_and_set_memory_size (cmd + cmdsize + 1);
|
|
}
|
|
else if (strcmp (cmd, "help") == 0)
|
|
{
|
|
(callback->printf_filtered) (callback, "List of SH simulator commands:\n\n");
|
|
(callback->printf_filtered) (callback, "set-memory-size <n> -- Set the number of address bits to use\n");
|
|
(callback->printf_filtered) (callback, "\n");
|
|
}
|
|
else
|
|
{
|
|
(callback->printf_filtered) (callback, "Error: \"%s\" is not a valid SH simulator command.\n", cmd);
|
|
}
|
|
}
|
|
|
|
void
|
|
sim_set_callbacks (sd, p)
|
|
SIM_DESC sd;
|
|
host_callback *p;
|
|
{
|
|
callback = p;
|
|
}
|