sim/ppc/emul_generic.c - native_client/nacl-gdb - Git at Google

 /*  This file is part of the program psim.

     Copyright (C) 1994-1997, Andrew Cagney <cagney@highland.com.au>

     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 2 of the License, or
     (at your option) any later version.

     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.

     You should have received a copy of the GNU General Public License
     along with this program; if not, write to the Free Software
     Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

     */


 #ifndef _EMUL_GENERIC_C_
 #define _EMUL_GENERIC_C_

 #include "emul_generic.h"

 #ifndef STATIC_INLINE_EMUL_GENERIC
 #define STATIC_INLINE_EMUL_GENERIC STATIC_INLINE
 #endif


 STATIC_INLINE_EMUL_GENERIC void
 emul_syscall_enter(emul_syscall *emul,
 		   int call,
 		   int arg0,
 		   cpu *processor,
 		   unsigned_word cia)
 {
   printf_filtered("%d:0x%lx:%s(",
 		  cpu_nr(processor) + 1,
 		  (long)cia,
 		  emul->syscall_descriptor[call].name);
 }


 STATIC_INLINE_EMUL_GENERIC void
 emul_syscall_exit(emul_syscall *emul,
 		  int call,
 		  int arg0,
 		  cpu *processor,
 		  unsigned_word cia)
 {
   int status = cpu_registers(processor)->gpr[3];
   int error = cpu_registers(processor)->gpr[0];
   printf_filtered(")=%d", status);
   if (error > 0 && error < emul->nr_error_names)
     printf_filtered("[%s]", emul->error_names[error]);
   printf_filtered("\n");
 }


 INLINE_EMUL_GENERIC unsigned64
 emul_read_gpr64(cpu *processor,
 		int g)
 {
   unsigned32 hi;
   unsigned32 lo;
   if (CURRENT_TARGET_BYTE_ORDER == BIG_ENDIAN) {
     hi = cpu_registers(processor)->gpr[g];
     lo = cpu_registers(processor)->gpr[g+1];
   }
   else {
     lo = cpu_registers(processor)->gpr[g];
     hi = cpu_registers(processor)->gpr[g+1];
   }
   return (INSERTED64(hi, 0, 31) | INSERTED64(lo, 32, 63));
 }


 INLINE_EMUL_GENERIC void
 emul_write_gpr64(cpu *processor,
 		 int g,
 		 unsigned64 val)
 {
   unsigned32 hi = EXTRACTED64(val, 0, 31);
   unsigned32 lo = EXTRACTED64(val, 32, 63);
   if (CURRENT_TARGET_BYTE_ORDER == BIG_ENDIAN) {
     cpu_registers(processor)->gpr[g] = hi;
     cpu_registers(processor)->gpr[g+1] = lo;
   }
   else {
     cpu_registers(processor)->gpr[g] = lo;
     cpu_registers(processor)->gpr[g+1] = hi;
   }
 }


 INLINE_EMUL_GENERIC char *
 emul_read_string(char *dest,
 		 unsigned_word addr,
 		 unsigned nr_bytes,
 		 cpu *processor,
 		 unsigned_word cia)
 {
   unsigned nr_moved = 0;
   if (addr == 0)
     return NULL;
   while (1) {
     dest[nr_moved] = vm_data_map_read_1(cpu_data_map(processor),
 					addr + nr_moved,
 					processor, cia);
     if (dest[nr_moved] == '\0' || nr_moved >= nr_bytes)
       break;
     nr_moved++;
   }
   dest[nr_moved] = '\0';
   return dest;
 }


 INLINE_EMUL_GENERIC void
 emul_write_status(cpu *processor,
 		  int status,
 		  int errno)
 {
   if (status == -1 && errno != 0) {
     cpu_registers(processor)->gpr[3] = errno;
     CR_SET(0, cr_i_summary_overflow);
   }
   else {
     cpu_registers(processor)->gpr[3] = status;
     CR_SET(0, 0);
   }
 }


 INLINE_EMUL_GENERIC void
 emul_write2_status(cpu *processor,
 		   int status1,
 		   int status2,
 		   int errno)
 {
   if (status1 == -1 && errno != 0) {
     cpu_registers(processor)->gpr[3] = errno;
     CR_SET(0, cr_i_summary_overflow);
   }
   else {
     cpu_registers(processor)->gpr[3] = status1;
     cpu_registers(processor)->gpr[4] = status2;
     CR_SET(0, 0);
   }
 }


 INLINE_EMUL_GENERIC unsigned_word
 emul_read_word(unsigned_word addr,
 	       cpu *processor,
 	       unsigned_word cia)
 {
   return vm_data_map_read_word(cpu_data_map(processor),
 			       addr,
 			       processor, cia);
 }


 INLINE_EMUL_GENERIC void
 emul_write_word(unsigned_word addr,
 		unsigned_word buf,
 		cpu *processor,
 		unsigned_word cia)
 {
   vm_data_map_write_word(cpu_data_map(processor),
 			 addr,
 			 buf,
 			 processor, cia);
 }


 INLINE_EMUL_GENERIC void
 emul_write_buffer(const void *source,
 		  unsigned_word addr,
 		  unsigned nr_bytes,
 		  cpu *processor,
 		  unsigned_word cia)
 {
   int nr_moved;
   for (nr_moved = 0; nr_moved < nr_bytes; nr_moved++) {
     vm_data_map_write_1(cpu_data_map(processor),
 			addr + nr_moved,
 			((const char*)source)[nr_moved],
 			processor, cia);
   }
 }


 INLINE_EMUL_GENERIC void
 emul_read_buffer(void *dest,
 		 unsigned_word addr,
 		 unsigned nr_bytes,
 		 cpu *processor,
 		 unsigned_word cia)
 {
   int nr_moved;
   for (nr_moved = 0; nr_moved < nr_bytes; nr_moved++) {
     ((char*)dest)[nr_moved] = vm_data_map_read_1(cpu_data_map(processor),
 						 addr + nr_moved,
 						 processor, cia);
   }
 }


 INLINE_EMUL_GENERIC void
 emul_do_system_call(os_emul_data *emul_data,
 		    emul_syscall *emul,
 		    unsigned call,
 		    const int arg0,
 		    cpu *processor,
 		    unsigned_word cia)
 {
   emul_syscall_handler *handler = NULL;
   if (call >= emul->nr_system_calls)
     error("do_call() os_emul call %d out-of-range\n", call);

   handler = emul->syscall_descriptor[call].handler;
   if (handler == NULL) {
     if (emul->syscall_descriptor[call].name) {
       error("do_call() unimplemented call %s\n", emul->syscall_descriptor[call].name);
     } else {
       error("do_call() unimplemented call %d\n", call);
     }
   }

   if (WITH_TRACE && ppc_trace[trace_os_emul])
     emul_syscall_enter(emul, call, arg0, processor, cia);

   cpu_registers(processor)->gpr[0] = 0; /* default success */
   handler(emul_data, call, arg0, processor, cia);

   if (WITH_TRACE && ppc_trace[trace_os_emul])
     emul_syscall_exit(emul, call, arg0, processor, cia);
 }


 /* default size for the first bank of memory */

 #ifndef OEA_MEMORY_SIZE
 #define OEA_MEMORY_SIZE 0x100000
 #endif


 /* Add options to the device tree */

 INLINE_EMUL_GENERIC void
 emul_add_tree_options(device *tree,
 		      bfd *image,
 		      const char *emul,
 		      const char *env,
 		      int oea_interrupt_prefix)
 {
   int little_endian = 0;

   /* sort out little endian */
   if (tree_find_property(tree, "/options/little-endian?"))
     little_endian = tree_find_boolean_property(tree, "/options/little-endian?");
   else {
 #ifdef bfd_little_endian	/* new bfd */
     little_endian = (image != NULL && bfd_little_endian(image));
 #else
     little_endian = (image != NULL &&
 		     !image->xvec->byteorder_big_p);
 #endif
     tree_parse(tree, "/options/little-endian? %s",
 	       little_endian ? "true" : "false");
   }

   /* misc other stuff */
   tree_parse(tree, "/openprom/options/oea-memory-size 0x%x",
 	     OEA_MEMORY_SIZE);
   tree_parse(tree, "/openprom/options/oea-interrupt-prefix %d",
 	     oea_interrupt_prefix);
   tree_parse(tree, "/openprom/options/smp 1");
   tree_parse(tree, "/openprom/options/env %s", env);
   tree_parse(tree, "/openprom/options/os-emul %s", emul);
   tree_parse(tree, "/openprom/options/strict-alignment? %s",
 	     (WITH_ALIGNMENT == STRICT_ALIGNMENT)
 	     ? "true" : "false");
   tree_parse(tree, "/openprom/options/floating-point? %s",
 	     WITH_FLOATING_POINT ? "true" : "false");
   tree_parse(tree, "/openprom/options/use-stdio? %s",
 	     ((WITH_STDIO == DO_USE_STDIO
 	       || WITH_STDIO == 0)
 	      ? "true" : "false"));
   tree_parse(tree, "/openprom/options/model \"%s",
 	     model_name[WITH_DEFAULT_MODEL]);
   tree_parse(tree, "/openprom/options/model-issue %d",
 	     MODEL_ISSUE_IGNORE);

   /* useful options */
 }

 INLINE_EMUL_GENERIC void
 emul_add_tree_hardware(device *root)
 {
   int i;
   int nr_cpus = tree_find_integer_property(root, "/openprom/options/smp");

   /* sanity check the number of processors */
   if (nr_cpus > MAX_NR_PROCESSORS)
     error("Specified number of processors (%d) exceeds the number configured (%d).\n",
 	  nr_cpus, MAX_NR_PROCESSORS);

   /* set the number of address cells (1 or 2) */
   tree_parse(root, "#address-cells %d", WITH_TARGET_WORD_BITSIZE / 32);

   /* add some memory */
   if (tree_find_device(root, "/memory") == NULL) {
     unsigned_word memory_size =
       tree_find_integer_property(root, "/openprom/options/oea-memory-size");
     const unsigned_word avail_start = 0x3000;
     tree_parse(root, "/memory@0/reg 0x0 0x%lx",
 	       (unsigned long)memory_size);
     /* reserve the first 0x3000 for the PowerPC interrupt table */
     tree_parse(root, "/memory@0/available 0x%lx  0x%lx",
 	       (unsigned long)avail_start,
 	       (unsigned long)memory_size - avail_start);
   }

   /* our processors */
   for (i = 0; i < nr_cpus; i++) {
     tree_parse(root, "/cpus/cpu@%d/cpu-nr %d", i, i);
   }

   /* the debugging pal - hide it in the openprom and don't attach it
      to any bus */
   tree_parse(root, "/openprom/pal");

   /* chosen etc */
   tree_parse(root, "/chosen/stdin */openprom/pal");
   tree_parse(root, "/chosen/stdout !/chosen/stdin");
   tree_parse(root, "/chosen/memory */memory");
 }

 #endif /* _EMUL_GENERIC_C_ */
	/* This file is part of the program psim.

	Copyright (C) 1994-1997, Andrew Cagney <cagney@highland.com.au>

	This program is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation; either version 2 of the License, or
	(at your option) any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with this program; if not, write to the Free Software
	Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

	*/


	#ifndef _EMUL_GENERIC_C_
	#define _EMUL_GENERIC_C_

	#include "emul_generic.h"

	#ifndef STATIC_INLINE_EMUL_GENERIC
	#define STATIC_INLINE_EMUL_GENERIC STATIC_INLINE
	#endif


	STATIC_INLINE_EMUL_GENERIC void
	emul_syscall_enter(emul_syscall *emul,
	int call,
	int arg0,
	cpu *processor,
	unsigned_word cia)
	{
	printf_filtered("%d:0x%lx:%s(",
	cpu_nr(processor) + 1,
	(long)cia,
	emul->syscall_descriptor[call].name);
	}


	STATIC_INLINE_EMUL_GENERIC void
	emul_syscall_exit(emul_syscall *emul,
	int call,
	int arg0,
	cpu *processor,
	unsigned_word cia)
	{
	int status = cpu_registers(processor)->gpr[3];
	int error = cpu_registers(processor)->gpr[0];
	printf_filtered(")=%d", status);
	if (error > 0 && error < emul->nr_error_names)
	printf_filtered("[%s]", emul->error_names[error]);
	printf_filtered("\n");
	}


	INLINE_EMUL_GENERIC unsigned64
	emul_read_gpr64(cpu *processor,
	int g)
	{
	unsigned32 hi;
	unsigned32 lo;
	if (CURRENT_TARGET_BYTE_ORDER == BIG_ENDIAN) {
	hi = cpu_registers(processor)->gpr[g];
	lo = cpu_registers(processor)->gpr[g+1];
	}
	else {
	lo = cpu_registers(processor)->gpr[g];
	hi = cpu_registers(processor)->gpr[g+1];
	}
	return (INSERTED64(hi, 0, 31) \| INSERTED64(lo, 32, 63));
	}


	INLINE_EMUL_GENERIC void
	emul_write_gpr64(cpu *processor,
	int g,
	unsigned64 val)
	{
	unsigned32 hi = EXTRACTED64(val, 0, 31);
	unsigned32 lo = EXTRACTED64(val, 32, 63);
	if (CURRENT_TARGET_BYTE_ORDER == BIG_ENDIAN) {
	cpu_registers(processor)->gpr[g] = hi;
	cpu_registers(processor)->gpr[g+1] = lo;
	}
	else {
	cpu_registers(processor)->gpr[g] = lo;
	cpu_registers(processor)->gpr[g+1] = hi;
	}
	}


	INLINE_EMUL_GENERIC char *
	emul_read_string(char *dest,
	unsigned_word addr,
	unsigned nr_bytes,
	cpu *processor,
	unsigned_word cia)
	{
	unsigned nr_moved = 0;
	if (addr == 0)
	return NULL;
	while (1) {
	dest[nr_moved] = vm_data_map_read_1(cpu_data_map(processor),
	addr + nr_moved,
	processor, cia);
	if (dest[nr_moved] == '\0' \|\| nr_moved >= nr_bytes)
	break;
	nr_moved++;
	}
	dest[nr_moved] = '\0';
	return dest;
	}


	INLINE_EMUL_GENERIC void
	emul_write_status(cpu *processor,
	int status,
	int errno)
	{
	if (status == -1 && errno != 0) {
	cpu_registers(processor)->gpr[3] = errno;
	CR_SET(0, cr_i_summary_overflow);
	}
	else {
	cpu_registers(processor)->gpr[3] = status;
	CR_SET(0, 0);
	}
	}


	INLINE_EMUL_GENERIC void
	emul_write2_status(cpu *processor,
	int status1,
	int status2,
	int errno)
	{
	if (status1 == -1 && errno != 0) {
	cpu_registers(processor)->gpr[3] = errno;
	CR_SET(0, cr_i_summary_overflow);
	}
	else {
	cpu_registers(processor)->gpr[3] = status1;
	cpu_registers(processor)->gpr[4] = status2;
	CR_SET(0, 0);
	}
	}


	INLINE_EMUL_GENERIC unsigned_word
	emul_read_word(unsigned_word addr,
	cpu *processor,
	unsigned_word cia)
	{
	return vm_data_map_read_word(cpu_data_map(processor),
	addr,
	processor, cia);
	}


	INLINE_EMUL_GENERIC void
	emul_write_word(unsigned_word addr,
	unsigned_word buf,
	cpu *processor,
	unsigned_word cia)
	{
	vm_data_map_write_word(cpu_data_map(processor),
	addr,
	buf,
	processor, cia);
	}


	INLINE_EMUL_GENERIC void
	emul_write_buffer(const void *source,
	unsigned_word addr,
	unsigned nr_bytes,
	cpu *processor,
	unsigned_word cia)
	{
	int nr_moved;
	for (nr_moved = 0; nr_moved < nr_bytes; nr_moved++) {
	vm_data_map_write_1(cpu_data_map(processor),
	addr + nr_moved,
	((const char*)source)[nr_moved],
	processor, cia);
	}
	}


	INLINE_EMUL_GENERIC void
	emul_read_buffer(void *dest,
	unsigned_word addr,
	unsigned nr_bytes,
	cpu *processor,
	unsigned_word cia)
	{
	int nr_moved;
	for (nr_moved = 0; nr_moved < nr_bytes; nr_moved++) {
	((char*)dest)[nr_moved] = vm_data_map_read_1(cpu_data_map(processor),
	addr + nr_moved,
	processor, cia);
	}
	}


	INLINE_EMUL_GENERIC void
	emul_do_system_call(os_emul_data *emul_data,
	emul_syscall *emul,
	unsigned call,
	const int arg0,
	cpu *processor,
	unsigned_word cia)
	{
	emul_syscall_handler *handler = NULL;
	if (call >= emul->nr_system_calls)
	error("do_call() os_emul call %d out-of-range\n", call);

	handler = emul->syscall_descriptor[call].handler;
	if (handler == NULL) {
	if (emul->syscall_descriptor[call].name) {
	error("do_call() unimplemented call %s\n", emul->syscall_descriptor[call].name);
	} else {
	error("do_call() unimplemented call %d\n", call);
	}
	}

	if (WITH_TRACE && ppc_trace[trace_os_emul])
	emul_syscall_enter(emul, call, arg0, processor, cia);

	cpu_registers(processor)->gpr[0] = 0; /* default success */
	handler(emul_data, call, arg0, processor, cia);

	if (WITH_TRACE && ppc_trace[trace_os_emul])
	emul_syscall_exit(emul, call, arg0, processor, cia);
	}


	/* default size for the first bank of memory */

	#ifndef OEA_MEMORY_SIZE
	#define OEA_MEMORY_SIZE 0x100000
	#endif


	/* Add options to the device tree */

	INLINE_EMUL_GENERIC void
	emul_add_tree_options(device *tree,
	bfd *image,
	const char *emul,
	const char *env,
	int oea_interrupt_prefix)
	{
	int little_endian = 0;

	/* sort out little endian */
	if (tree_find_property(tree, "/options/little-endian?"))
	little_endian = tree_find_boolean_property(tree, "/options/little-endian?");
	else {
	#ifdef bfd_little_endian /* new bfd */
	little_endian = (image != NULL && bfd_little_endian(image));
	#else
	little_endian = (image != NULL &&
	!image->xvec->byteorder_big_p);
	#endif
	tree_parse(tree, "/options/little-endian? %s",
	little_endian ? "true" : "false");
	}

	/* misc other stuff */
	tree_parse(tree, "/openprom/options/oea-memory-size 0x%x",
	OEA_MEMORY_SIZE);
	tree_parse(tree, "/openprom/options/oea-interrupt-prefix %d",
	oea_interrupt_prefix);
	tree_parse(tree, "/openprom/options/smp 1");
	tree_parse(tree, "/openprom/options/env %s", env);
	tree_parse(tree, "/openprom/options/os-emul %s", emul);
	tree_parse(tree, "/openprom/options/strict-alignment? %s",
	(WITH_ALIGNMENT == STRICT_ALIGNMENT)
	? "true" : "false");
	tree_parse(tree, "/openprom/options/floating-point? %s",
	WITH_FLOATING_POINT ? "true" : "false");
	tree_parse(tree, "/openprom/options/use-stdio? %s",
	((WITH_STDIO == DO_USE_STDIO
	\|\| WITH_STDIO == 0)
	? "true" : "false"));
	tree_parse(tree, "/openprom/options/model \"%s",
	model_name[WITH_DEFAULT_MODEL]);
	tree_parse(tree, "/openprom/options/model-issue %d",
	MODEL_ISSUE_IGNORE);

	/* useful options */
	}

	INLINE_EMUL_GENERIC void
	emul_add_tree_hardware(device *root)
	{
	int i;
	int nr_cpus = tree_find_integer_property(root, "/openprom/options/smp");

	/* sanity check the number of processors */
	if (nr_cpus > MAX_NR_PROCESSORS)
	error("Specified number of processors (%d) exceeds the number configured (%d).\n",
	nr_cpus, MAX_NR_PROCESSORS);

	/* set the number of address cells (1 or 2) */
	tree_parse(root, "#address-cells %d", WITH_TARGET_WORD_BITSIZE / 32);

	/* add some memory */
	if (tree_find_device(root, "/memory") == NULL) {
	unsigned_word memory_size =
	tree_find_integer_property(root, "/openprom/options/oea-memory-size");
	const unsigned_word avail_start = 0x3000;
	tree_parse(root, "/memory@0/reg 0x0 0x%lx",
	(unsigned long)memory_size);
	/* reserve the first 0x3000 for the PowerPC interrupt table */
	tree_parse(root, "/memory@0/available 0x%lx 0x%lx",
	(unsigned long)avail_start,
	(unsigned long)memory_size - avail_start);
	}

	/* our processors */
	for (i = 0; i < nr_cpus; i++) {
	tree_parse(root, "/cpus/cpu@%d/cpu-nr %d", i, i);
	}

	/* the debugging pal - hide it in the openprom and don't attach it
	to any bus */
	tree_parse(root, "/openprom/pal");

	/* chosen etc */
	tree_parse(root, "/chosen/stdin */openprom/pal");
	tree_parse(root, "/chosen/stdout !/chosen/stdin");
	tree_parse(root, "/chosen/memory */memory");
	}

	#endif /* _EMUL_GENERIC_C_ */