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-rw-r--r--sim/arm/wrapper.c467
1 files changed, 467 insertions, 0 deletions
diff --git a/sim/arm/wrapper.c b/sim/arm/wrapper.c
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+/* run front end support for arm
+ Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
+
+This file is part of ARM SIM.
+
+GNU CC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU CC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+/* This file provides the interface between the simulator and run.c and gdb
+ (when the simulator is linked with gdb).
+ All simulator interaction should go through this file. */
+
+#include <stdio.h>
+#include <stdarg.h>
+#include <bfd.h>
+#include <signal.h>
+#include "callback.h"
+#include "remote-sim.h"
+#include "armdefs.h"
+#include "armemu.h"
+#include "dbg_rdi.h"
+
+host_callback *sim_callback;
+
+static struct ARMul_State *state;
+
+/* Who is using the simulator. */
+static SIM_OPEN_KIND sim_kind;
+
+/* argv[0] */
+static char *myname;
+
+/* Memory size in bytes. */
+static int mem_size = (1 << 21);
+
+/* Non-zero to display start up banner, and maybe other things. */
+static int verbosity;
+
+/* Non-zero to set big endian mode. */
+static int big_endian;
+
+static void
+init ()
+{
+ static int done;
+
+ if (!done)
+ {
+ ARMul_EmulateInit();
+ state = ARMul_NewState ();
+ state->bigendSig = (big_endian ? HIGH : LOW);
+ ARMul_MemoryInit(state, mem_size);
+ ARMul_OSInit(state);
+ ARMul_CoProInit(state);
+ state->verbose = verbosity;
+ done = 1;
+ }
+}
+
+/* Set verbosity level of simulator.
+ This is not intended to produce detailed tracing or debugging information.
+ Just summaries. */
+/* FIXME: common/run.c doesn't do this yet. */
+
+void
+sim_set_verbose (v)
+ int v;
+{
+ verbosity = v;
+}
+
+/* Set the memory size to SIZE bytes.
+ Must be called before initializing simulator. */
+/* FIXME: Rename to sim_set_mem_size. */
+
+void
+sim_size (size)
+ int size;
+{
+ mem_size = size;
+}
+
+void
+ARMul_ConsolePrint (ARMul_State * state, const char *format,...)
+{
+ va_list ap;
+
+ if (state->verbose)
+ {
+ va_start (ap, format);
+ vprintf (format, ap);
+ va_end (ap);
+ }
+}
+
+ARMword
+ARMul_Debug (ARMul_State * state, ARMword pc, ARMword instr)
+{
+
+}
+
+int
+sim_write (sd, addr, buffer, size)
+ SIM_DESC sd;
+ SIM_ADDR addr;
+ unsigned char *buffer;
+ int size;
+{
+ int i;
+ init ();
+ for (i = 0; i < size; i++)
+ {
+ ARMul_WriteByte (state, 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 ();
+ for (i = 0; i < size; i++)
+ {
+ buffer[i] = ARMul_ReadByte (state, addr + i);
+ }
+ return size;
+}
+
+int
+sim_trace (sd)
+ SIM_DESC sd;
+{
+ (*sim_callback->printf_filtered) (sim_callback, "This simulator does not support tracing\n");
+ return 1;
+}
+
+int
+sim_stop (sd)
+ SIM_DESC sd;
+{
+ return 0;
+}
+
+void
+sim_resume (sd, step, siggnal)
+ SIM_DESC sd;
+ int step, siggnal;
+{
+ state->EndCondition = 0;
+
+ if (step)
+ {
+ state->Reg[15] = ARMul_DoInstr (state);
+ if (state->EndCondition == 0)
+ state->EndCondition = RDIError_BreakpointReached;
+ }
+ else
+ {
+#if 1 /* JGS */
+ state->NextInstr = RESUME; /* treat as PC change */
+#endif
+ state->Reg[15] = ARMul_DoProg (state);
+ }
+
+ FLUSHPIPE;
+}
+
+SIM_RC
+sim_create_inferior (sd, abfd, argv, env)
+ SIM_DESC sd;
+ struct _bfd *abfd;
+ char **argv;
+ char **env;
+{
+ int argvlen=0;
+ char **arg;
+
+ if (abfd != NULL)
+ ARMul_SetPC (state, bfd_get_start_address (abfd));
+ else
+ ARMul_SetPC (state, 0); /* ??? */
+
+#if 1 /* JGS */
+ /* We explicitly select a processor capable of supporting the ARM
+ 32bit mode, and then we force the simulated CPU into the 32bit
+ User mode: */
+ ARMul_SelectProcessor(state, ARM600);
+ ARMul_SetCPSR(state, USER32MODE);
+#endif
+
+ if (argv != NULL)
+ {
+ /*
+ ** Set up the command line (by laboriously stringing together the
+ ** environment carefully picked apart by our caller...)
+ */
+ /* Free any old stuff */
+ if (state->CommandLine != NULL)
+ {
+ free(state->CommandLine);
+ state->CommandLine = NULL;
+ }
+
+ /* See how much we need */
+ for (arg = argv; *arg != NULL; arg++)
+ argvlen += strlen(*arg)+1;
+
+ /* allocate it... */
+ state->CommandLine = malloc(argvlen+1);
+ if (state->CommandLine != NULL)
+ {
+ arg = argv;
+ state->CommandLine[0]='\0';
+ for (arg = argv; *arg != NULL; arg++)
+ {
+ strcat(state->CommandLine, *arg);
+ strcat(state->CommandLine, " ");
+ }
+ }
+ }
+
+ if (env != NULL)
+ {
+ /* Now see if there's a MEMSIZE spec in the environment */
+ while (*env)
+ {
+ if (strncmp(*env, "MEMSIZE=", sizeof("MEMSIZE=")-1)==0)
+ {
+ unsigned long top_of_memory;
+ char *end_of_num;
+
+ /* Set up memory limit */
+ state->MemSize = strtoul(*env + sizeof("MEMSIZE=")-1, &end_of_num, 0);
+ }
+ env++;
+ }
+ }
+
+ return SIM_RC_OK;
+}
+
+void
+sim_info (sd, verbose)
+ SIM_DESC sd;
+ int verbose;
+{
+}
+
+
+static int
+frommem (state, memory)
+ struct ARMul_State *state;
+ unsigned char *memory;
+{
+ if (state->bigendSig == HIGH)
+ {
+ return (memory[0] << 24)
+ | (memory[1] << 16)
+ | (memory[2] << 8)
+ | (memory[3] << 0);
+ }
+ else
+ {
+ return (memory[3] << 24)
+ | (memory[2] << 16)
+ | (memory[1] << 8)
+ | (memory[0] << 0);
+ }
+}
+
+
+static void
+tomem (state, memory, val)
+ struct ARMul_State *state;
+ unsigned char *memory;
+ int val;
+{
+ if (state->bigendSig == HIGH)
+ {
+ memory[0] = val >> 24;
+ memory[1] = val >> 16;
+ memory[2] = val >> 8;
+ memory[3] = val >> 0;
+ }
+ else
+ {
+ memory[3] = val >> 24;
+ memory[2] = val >> 16;
+ memory[1] = val >> 8;
+ memory[0] = val >> 0;
+ }
+}
+
+int
+sim_store_register (sd, rn, memory, length)
+ SIM_DESC sd;
+ int rn;
+ unsigned char *memory;
+ int length;
+{
+ init ();
+ ARMul_SetReg(state, state->Mode, rn, frommem (state, memory));
+ return -1;
+}
+
+int
+sim_fetch_register (sd, rn, memory, length)
+ SIM_DESC sd;
+ int rn;
+ unsigned char *memory;
+ int length;
+{
+ ARMword regval;
+
+ init ();
+ if (rn < 16)
+ regval = ARMul_GetReg(state, state->Mode, rn);
+ else if (rn == 25) /* FIXME: use PS_REGNUM from gdb/config/arm/tm-arm.h */
+ regval = ARMul_GetCPSR(state);
+ else
+ regval = 0; /* FIXME: should report an error */
+ tomem (state, memory, regval);
+ return -1;
+}
+
+SIM_DESC
+sim_open (kind, ptr, abfd, argv)
+ SIM_OPEN_KIND kind;
+ host_callback *ptr;
+ struct _bfd *abfd;
+ char **argv;
+{
+ sim_kind = kind;
+ myname = argv[0];
+ sim_callback = ptr;
+
+ /* Decide upon the endian-ness of the processor.
+ If we can, get the information from the bfd itself.
+ Otherwise look to see if we have been given a command
+ line switch that tells us. Otherwise default to little endian. */
+ if (abfd != NULL)
+ big_endian = bfd_big_endian (abfd);
+ else if (argv[1] != NULL)
+ {
+ int i;
+
+ /* Scan for endian-ness switch. */
+ for (i = 0; (argv[i] != NULL) && (argv[i][0] != 0); i++)
+ if (argv[i][0] == '-' && argv[i][1] == 'E')
+ {
+ char c;
+
+ if ((c = argv[i][2]) == 0)
+ {
+ ++i;
+ c = argv[i][0];
+ }
+
+ switch (c)
+ {
+ case 0:
+ sim_callback->printf_filtered
+ (sim_callback, "No argument to -E option provided\n");
+ break;
+
+ case 'b':
+ case 'B':
+ big_endian = 1;
+ break;
+
+ case 'l':
+ case 'L':
+ big_endian = 0;
+ break;
+
+ default:
+ sim_callback->printf_filtered
+ (sim_callback, "Unrecognised argument to -E option\n");
+ break;
+ }
+ }
+ }
+
+ return (SIM_DESC) 1;
+}
+
+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, sim_callback, prog, abfd,
+ sim_kind == SIM_OPEN_DEBUG,
+ 0, sim_write);
+ if (prog_bfd == NULL)
+ return SIM_RC_FAIL;
+ ARMul_SetPC (state, bfd_get_start_address (prog_bfd));
+ if (abfd == NULL)
+ bfd_close (prog_bfd);
+ return SIM_RC_OK;
+}
+
+void
+sim_stop_reason (sd, reason, sigrc)
+ SIM_DESC sd;
+ enum sim_stop *reason;
+ int *sigrc;
+{
+ if (state->EndCondition == 0)
+ {
+ *reason = sim_exited;
+ *sigrc = state->Reg[0] & 255;
+ }
+ else
+ {
+ *reason = sim_stopped;
+ if (state->EndCondition == RDIError_BreakpointReached)
+ *sigrc = SIGTRAP;
+ else
+ *sigrc = 0;
+ }
+}
+
+void
+sim_do_command (sd, cmd)
+ SIM_DESC sd;
+ char *cmd;
+{
+ (*sim_callback->printf_filtered) (sim_callback, "This simulator does not accept any commands.\n");
+}
+
+
+void
+sim_set_callbacks (ptr)
+ host_callback *ptr;
+{
+ sim_callback = ptr;
+}
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