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sim: sh: convert to nrun

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A lot of cpu state is stored in global variables, as is memory handling.
The sim_size support needs unwinding at some point.  But at least this
is an improvement on the status quo.
This commit is contained in:
Mike Frysinger
2015-03-28 17:36:03 -04:00
parent 5fa71a1b13
commit 62454d3da2
5 changed files with 260 additions and 227 deletions
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278
sim/sh/interp.c
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@ -67,7 +67,10 @@
#include "gdb/callback.h"
#include "gdb/remote-sim.h"
#include "gdb/sim-sh.h"
#include "run-sim.h"
#include "sim-main.h"
#include "sim-base.h"
#include "sim-options.h"
/* This file is local - if newlib changes, then so should this. */
#include "syscall.h"
@ -91,9 +94,11 @@
#define SIGTRAP 5
#endif
extern unsigned short sh_jump_table[], sh_dsp_table[0x1000], ppi_table[];
/* TODO: Stop using these names. */
#undef SEXT
#undef SEXT32
int sim_write (SIM_DESC sd, SIM_ADDR addr, const unsigned char *buffer, int size);
extern unsigned short sh_jump_table[], sh_dsp_table[0x1000], ppi_table[];
#define O_RECOMPILE 85
#define DEFINE_TABLE
@ -103,108 +108,7 @@ int sim_write (SIM_DESC sd, SIM_ADDR addr, const unsigned char *buffer, int size
for a quit. */
#define POLL_QUIT_INTERVAL 0x60000
typedef struct
{
int regs[20];
} regstacktype;
typedef union
{
struct
{
int regs[16];
int pc;
/* System registers. For sh-dsp this also includes A0 / X0 / X1 / Y0 / Y1
which are located in fregs, i.e. strictly speaking, these are
out-of-bounds accesses of sregs.i . This wart of the code could be
fixed by making fregs part of sregs, and including pc too - to avoid
alignment repercussions - but this would cause very onerous union /
structure nesting, which would only be managable with anonymous
unions and structs. */
union
{
struct
{
int mach;
int macl;
int pr;
int dummy3, dummy4;
int fpul; /* A1 for sh-dsp - but only for movs etc. */
int fpscr; /* dsr for sh-dsp */
} named;
int i[7];
} sregs;
/* sh3e / sh-dsp */
union fregs_u
{
float f[16];
double d[8];
int i[16];
}
fregs[2];
/* Control registers; on the SH4, ldc / stc is privileged, except when
accessing gbr. */
union
{
struct
{
int sr;
int gbr;
int vbr;
int ssr;
int spc;
int mod;
/* sh-dsp */
int rs;
int re;
/* sh3 */
int bank[8];
int dbr; /* debug base register */
int sgr; /* saved gr15 */
int ldst; /* load/store flag (boolean) */
int tbr;
int ibcr; /* sh2a bank control register */
int ibnr; /* sh2a bank number register */
} named;
int i[16];
} cregs;
unsigned char *insn_end;
int ticks;
int stalls;
int memstalls;
int cycles;
int insts;
int prevlock;
int thislock;
int exception;
int end_of_registers;
int msize;
#define PROFILE_FREQ 1
#define PROFILE_SHIFT 2
int profile;
unsigned short *profile_hist;
unsigned char *memory;
int xyram_select, xram_start, yram_start;
unsigned char *xmem;
unsigned char *ymem;
unsigned char *xmem_offset;
unsigned char *ymem_offset;
unsigned long bfd_mach;
regstacktype *regstack;
}
asregs;
int asints[40];
} saved_state_type;
/* TODO: Move into sim_cpu. */
saved_state_type saved_state;
struct loop_bounds { unsigned char *start, *end; };
@ -212,20 +116,15 @@ struct loop_bounds { unsigned char *start, *end; };
/* These variables are at file scope so that functions other than
sim_resume can use the fetch/store macros */
static int target_little_endian;
#define target_little_endian (CURRENT_TARGET_BYTE_ORDER == LITTLE_ENDIAN)
static int global_endianw, endianb;
static int target_dsp;
static int host_little_endian;
#define host_little_endian (CURRENT_HOST_BYTE_ORDER == LITTLE_ENDIAN)
static char **prog_argv;
static int maskw = 0;
static int maskl = 0;
static SIM_OPEN_KIND sim_kind;
static char *myname;
static int tracing = 0;
/* Short hand definitions of the registers */
#define SBIT(x) ((x)&sbit)
@ -1687,7 +1586,7 @@ mcalloc (size_t nmemb, size_t size)
/* Set the memory size to the power of two provided. */
void
static void
sim_size (int power)
{
sim_memory_size = power;
@ -1809,10 +1708,6 @@ init_dsp (struct bfd *abfd)
static void
init_pointers (void)
{
host_little_endian = 0;
* (char*) &host_little_endian = 1;
host_little_endian &= 1;
if (saved_state.asregs.msize != 1 << sim_memory_size)
{
sim_size (sim_memory_size);
@ -1869,13 +1764,6 @@ gotcall (int from, int to)
#define MMASKB ((saved_state.asregs.msize -1) & ~0)
int
sim_stop (SIM_DESC sd)
{
raise_exception (SIGINT);
return 1;
}
void
sim_resume (SIM_DESC sd, int step, int siggnal)
{
@ -1968,9 +1856,6 @@ sim_resume (SIM_DESC sd, int step, int siggnal)
insts++;
#endif
top:
if (tracing)
fprintf (stderr, "PC: %08lx, insn: %04x\n",
(unsigned long) PH2T (insn_ptr), iword);
#include "code.c"
@ -2436,15 +2321,6 @@ sim_fetch_register (SIM_DESC sd, int rn, unsigned char *memory, int length)
return length;
}
int
sim_trace (SIM_DESC sd)
{
tracing = 1;
sim_resume (sd, 0, 0);
tracing = 0;
return 1;
}
void
sim_stop_reason (SIM_DESC sd, enum sim_stop *reason, int *sigrc)
{
@ -2497,23 +2373,19 @@ sim_info (SIM_DESC sd, int verbose)
}
}
void
sim_set_profile (int n)
static void
free_state (SIM_DESC sd)
{
saved_state.asregs.profile = n;
}
void
sim_set_profile_size (int n)
{
sim_profile_size = n;
if (STATE_MODULES (sd) != NULL)
sim_module_uninstall (sd);
sim_cpu_free_all (sd);
sim_state_free (sd);
}
SIM_DESC
sim_open (SIM_OPEN_KIND kind, host_callback *cb, struct bfd *abfd, char **argv)
{
char **p;
int endian_set = 0;
int i;
union
{
@ -2523,32 +2395,65 @@ sim_open (SIM_OPEN_KIND kind, host_callback *cb, struct bfd *abfd, char **argv)
}
mem_word;
sim_kind = kind;
myname = argv[0];
SIM_DESC sd = sim_state_alloc (kind, cb);
SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
callback = cb;
/* The cpu data is kept in a separately allocated chunk of memory. */
if (sim_cpu_alloc_all (sd, 1, /*cgen_cpu_max_extra_bytes ()*/0) != SIM_RC_OK)
{
free_state (sd);
return 0;
}
if (sim_pre_argv_init (sd, argv[0]) != SIM_RC_OK)
{
free_state (sd);
return 0;
}
/* getopt will print the error message so we just have to exit if this fails.
FIXME: Hmmm... in the case of gdb we need getopt to call
print_filtered. */
if (sim_parse_args (sd, argv) != SIM_RC_OK)
{
free_state (sd);
return 0;
}
/* Check for/establish the a reference program image. */
if (sim_analyze_program (sd,
(STATE_PROG_ARGV (sd) != NULL
? *STATE_PROG_ARGV (sd)
: NULL), abfd) != SIM_RC_OK)
{
free_state (sd);
return 0;
}
/* Configure/verify the target byte order and other runtime
configuration options. */
if (sim_config (sd) != SIM_RC_OK)
{
sim_module_uninstall (sd);
return 0;
}
if (sim_post_argv_init (sd) != SIM_RC_OK)
{
/* Uninstall the modules to avoid memory leaks,
file descriptor leaks, etc. */
sim_module_uninstall (sd);
return 0;
}
for (p = argv + 1; *p != NULL; ++p)
{
if (strcmp (*p, "-E") == 0)
{
++p;
if (*p == NULL)
{
/* FIXME: This doesn't use stderr, but then the rest of the
file doesn't either. */
callback->printf_filtered (callback, "Missing argument to `-E'.\n");
return 0;
}
target_little_endian = strcmp (*p, "big") != 0;
endian_set = 1;
}
else if (isdigit (**p))
if (isdigit (**p))
parse_and_set_memory_size (*p);
}
if (abfd != NULL && ! endian_set)
target_little_endian = ! bfd_big_endian (abfd);
if (abfd)
init_dsp (abfd);
@ -2560,8 +2465,7 @@ sim_open (SIM_OPEN_KIND kind, host_callback *cb, struct bfd *abfd, char **argv)
mem_word.c[i] = i;
endianb = mem_word.i >> (target_little_endian ? 0 : 24) & 0xff;
/* fudge our descriptor for now */
return (SIM_DESC) 1;
return sd;
}
static void
@ -2582,31 +2486,6 @@ sim_close (SIM_DESC sd, int quitting)
/* nothing to do */
}
SIM_RC
sim_load (SIM_DESC sd, const 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,
0, sim_write);
/* Set the bfd machine type. */
if (prog_bfd)
saved_state.asregs.bfd_mach = bfd_get_mach (prog_bfd);
else if (abfd)
saved_state.asregs.bfd_mach = bfd_get_mach (abfd);
else
saved_state.asregs.bfd_mach = 0;
if (prog_bfd == NULL)
return SIM_RC_FAIL;
if (abfd == NULL)
bfd_close (prog_bfd);
return SIM_RC_OK;
}
SIM_RC
sim_create_inferior (SIM_DESC sd, struct bfd *prog_bfd, char **argv, char **env)
{
@ -2622,6 +2501,9 @@ sim_create_inferior (SIM_DESC sd, struct bfd *prog_bfd, char **argv, char **env)
if (prog_bfd != NULL)
saved_state.asregs.bfd_mach = bfd_get_mach (prog_bfd);
if (prog_bfd != NULL)
init_dsp (prog_bfd);
/* Record the program's arguments. */
prog_argv = argv;
@ -2657,15 +2539,3 @@ sim_do_command (SIM_DESC sd, const char *cmd)
(callback->printf_filtered) (callback, "Error: \"%s\" is not a valid SH simulator command.\n", cmd);
}
}
void
sim_set_callbacks (host_callback *p)
{
callback = p;
}
char **
sim_complete_command (SIM_DESC sd, const char *text, const char *word)
{
return NULL;
}