RE: PATCH : H8300 Simulator File I/O Implementation

["D.Venkatasubramanian, Noida" <dvenkat@noida.hcltech.com>]

[-- Attachment #1: Type: text/plain, Size: 5449 bytes --]

Hi All,

Attached are patches and some new files that should add 
basic File I/O support to the H8300 simulator. This work 
is in continuation of the message I posted earlier :

http://sources.redhat.com/ml/gdb-patches/2002-12/msg00679.html

Based on some suggestions from Kazu Hirata, I have made some 
changes. The patch to binutils has already been applied so I am 
not attaching the same. The file newlib_patch.txt contains the 
changes required in newlib/libc/sys/h8300hms/syscalls.c and 
newlib/libc/sys/h8300hms/Makefile.in. the file 
simulator_patch.txt contains the changes required in 
sim/h8300/compile.c.

Some changes that were to be made to include/opcode/h8300.h have 
already been applied, hence that is not attached.

A listing of the major changes made are listed at the end of the 
mail. Two files read.c and write.c in newlib/libc/sys/h8300hms/ 
may be removed.

Any suggestions on these patches and how it could be improved are 
welcome. Please apply the patches if they are found appropriate.

Thanks Kazu for your invaluable suggestions.

Thanks and Regards,

Venky



ChangeLog entries :

Simulator Directory : sim/h8300/

2002-12-31  D.Venkatasubramanian <dvenkat@noida.hcltech.com>

	* compile.c (decode): Added code for some more magic traps.
	* compile.c (sim_resume): Added support for File I/O system
	calls through callback to host_system.
	System calls provided support for :
	open, read, write, lseek, close, stat, fstat
	Only basic support for stat and fstat.

Newlib Directory : newlib

2002-12-31   D.Venkatasubramanian <dvenkat@noida.hcltech.com>

        * /libc/sys/h8300hms/syscalls.c: Removed functions _open,
        _lseek, _close, _stat, _fstat.
        * /libc/sys/h8300hms/read.c: Removed.
        * /libc/sys/h8300hms/write.c: Removed.
        * /libc/sys/h8300hms/open.S: Hand coded assembly for
        implementing _open removed from syscalls.c.
        * /libc/sys/h8300hms/read.S: Hand coded assembly for
        implementing _read removed from read.c.
        * /libc/sys/h8300hms/write.S: Hand coded assembly for
        implementing _write removed from write.c.
        * /libc/sys/h8300hms/lseek.S: Hand coded assembly for
        implementing _lseek removed from syscalls.c.
        * /libc/sys/h8300hms/close.S: Hand coded assembly for
        implementing _close removed from syscalls.c.
        * /libc/sys/h8300hms/fstat.S: Hand coded assembly for
        implementing _fstat removed from syscalls.c.
        * /libc/sys/h8300hms/stat.S: Hand coded assembly for
        implementing _stat removed from syscalls.c.



PS:

Major changes made :

1) In newlib, the functions _open, _read, etc. present in 
newlib/libc/sys/h8300hms/syscalls.c have been removed from there.

2) These functiong are implemented directly in assembly as 
suggested by Kazu Hirata. The sizeof integers on H8300H and H8300S 
depends on whether -mint32 was given or not during compilation. And, 
also, to make sure that the contents of r0, r1, r2 are propagated
unchanged to the syscall even if the compiler optimization is not
turned on, the functions are implemented in assembly.
These files should be added to newlib/libc/sys/h8300hms/ directory.

Assembly files included :
open.S - implementation of _open
read.S - implementation of _read
write.S - implementation of _write
lseek.S - implementation of _lseek
close.S - implementation of _close
fstat.S - implementation of _fstat
stat.S - implementation of _stat

Once syscalls.c is removed, we could combine all the functions into a 
single syscalls.S file.

3) Change has to be made to Makefile.in in newlib/libc/sys/h8300hms/ 
directory.

Instead of the earlier entry:

lib_a_SOURCES = syscalls.c write.c _exit.c read.c sbrk.c misc.c crt1.c

It has been changed to:

lib_a_SOURCES = syscalls.c open.s read.s write.s lseek.s close.s stat.s \
fstat.s _exit.c sbrk.c misc.c crt1.c

Somehow, I have to specify open.s instead of open.S, even though the 
assembly files are named as open.S etc. Is this correct?

4) Files read.c and write.c are rendered redundant and hence should be 
removed.


Reading specs from
/export/venkat/gcc_release/h8300-elf/tools/bin/../lib/gcc-lib/h8300-elf/3.3/
specs
Configured with: /home/venkat/gcc_3_3/combined/configure
--prefix=/export/venkat/gcc_release/h8300-elf/tools/ --target=h8300-elf
--with-newlib --enable-languages=c,c++ --with-gnu-ld --with-gnu-as
--with-ld=/export/venkat/gcc_release/h8300-elf/tools/h8300-elf/bin/ld
--with-as=/export/venkat/gcc_release/h8300-elf/tools/h8300-elf/bin/as
--with-headers=/home/venkat/gcc_3_3/combined/newlib/libc/include/ :
(reconfigured) /home/venkat/gcc_3_3/combined/configure
--prefix=/export/venkat/gcc_release/h8300-elf/tools/ --target=h8300-elf
--with-newlib --enable-languages=c,c++ --with-gnu-ld --with-gnu-as
--with-ld=/export/venkat/gcc_release/h8300-elf/tools/h8300-elf/bin/ld
--with-as=/export/venkat/gcc_release/h8300-elf/tools/h8300-elf/bin/as
--with-headers=/home/venkat/gcc_3_3/combined/newlib/libc/include/ :
(reconfigured) /home/venkat/gcc_3_3/combined/configure
--prefix=/export/venkat/gcc_release/h8300-elf/tools/ --target=h8300-elf
--with-newlib --enable-languages=c,c++ --with-gnu-ld --with-gnu-as
--with-ld=/export/venkat/gcc_release/h8300-elf/tools/h8300-elf/bin/ld
--with-as=/export/venkat/gcc_release/h8300-elf/tools/h8300-elf/bin/as
--with-headers=/home/venkat/gcc_3_3/combined/newlib/libc/include/
Thread model: single
gcc version 3.3 20020925 (experimental)


[-- Attachment #2: close.S --]
[-- Type: application/octet-stream, Size: 273 bytes --]

#if defined(__H8300H__)
	.h8300h
#endif
#if defined(__H8300S__)
	.h8300s
#endif

	.section .text
	.align 2
	.global __close
__close:
#if defined(__H8300H__) || defined(__H8300S__)
#if __INT_MAX__ == 32767
	extu.l er0
#endif
#endif
	jsr @@0xc9
	rts
	.end

[-- Attachment #3: fstat.S --]
[-- Type: application/octet-stream, Size: 284 bytes --]

#if defined(__H8300H__)
	.h8300h
#endif
#if defined(__H8300S__)
	.h8300s
#endif

	.section .text
	.align 2
	.global __fstat
__fstat:
#if defined(__H8300H__) || defined(__H8300S__)
#if __INT_MAX__ == 32767
	extu.l	er0
#endif
#endif
	jsr @@0xcb
	rts
	.end
									

[-- Attachment #4: lseek.S --]
[-- Type: application/octet-stream, Size: 286 bytes --]

#if defined(__H8300H__)
	.h8300h
#endif
#if defined(__H8300S__)
	.h8300s
#endif

	.section .text
	.align 2
	.global __lseek
__lseek:
#if defined(__H8300H__) || defined(__H8300S__)
#if __INT_MAX__ == 32767
	extu.l er0
	extu.l er2
#endif
#endif
	jsr @@0xc8
	rts
	.end

[-- Attachment #5: open.S --]
[-- Type: application/octet-stream, Size: 168 bytes --]

#if defined(__H8300H__)
	.h8300h
#endif
#if defined(__H8300S__)
	.h8300s
#endif

	.section .text
	.align 2
	.global __open
__open:
	jsr @@0xc5
	rts
	.end

[-- Attachment #6: read.S --]
[-- Type: application/octet-stream, Size: 283 bytes --]

#if defined(__H8300H__)
	.h8300h
#endif
#if defined(__H8300S__)
	.h8300s
#endif

	.section .text
	.align 2
	.global __read
__read:
#if defined(__H8300H__) || defined(__H8300S__)
#if __INT_MAX__ == 32767
	extu.l  er0
#endif
#endif
	jsr @@0xc6
	rts
	.end
									

[-- Attachment #7: stat.S --]
[-- Type: application/octet-stream, Size: 179 bytes --]

#if defined(__H8300H__)
	.h8300h
#endif
#if defined(__H8300S__)
	.h8300s
#endif

	.section .text
	.align 2
	.global __stat
__stat:
	jsr @@0xca
	rts
	.end
									

[-- Attachment #8: write.S --]
[-- Type: application/octet-stream, Size: 275 bytes --]

#if defined(__H8300H__)
	.h8300h
#endif

#if defined(__H8300S__)
	.h8300s
#endif

	.section .text
	.align 2
	.global __write
__write:
#if defined(__H8300H__) || defined(__H8300S__)
#if __INT_MAX__ == 32767
	extu.l	er0
#endif
#endif
	jsr @@0xc7
	rts
	.end

[-- Attachment #9: simulator_patch.txt --]
[-- Type: text/plain, Size: 11449 bytes --]

*** sim/h8300/compile.c.original	Thu Dec 26 17:15:41 2002
--- sim/h8300/compile.c.modified	Tue Dec 31 14:11:58 2002
***************
*** 35,40 ****
--- 35,42 ----
  #include "gdb/callback.h"
  #include "gdb/remote-sim.h"
  #include "gdb/sim-h8300.h"
+ #include "sys/stat.h"
+ #include "sys/types.h"
  
  #ifndef SIGTRAP
  # define SIGTRAP 5
*************** decode (addr, data, dst)
*** 452,461 ****
  
  		  if (dst->opcode == O (O_JSR, SB))
  		    {
! 		      if (dst->src.literal == 0xc4)
  			{
! 			  dst->opcode = O (O_SYSCALL, SB);
  			}
  		    }
  
  		  dst->next_pc = addr + len / 2;
--- 454,484 ----
  
  		  if (dst->opcode == O (O_JSR, SB))
  		    {
! 		      switch (dst->src.literal)
  			{
! 			case 0xc5:
! 			  dst->opcode = O (O_SYS_OPEN, SB);
! 			  break;
! 			case 0xc6:
! 			  dst->opcode = O (O_SYS_READ, SB);
! 			  break;
! 			case 0xc7:
! 			  dst->opcode = O (O_SYS_WRITE, SB);
! 			  break;
! 			case 0xc8:
! 			  dst->opcode = O (O_SYS_LSEEK, SB);
! 			  break;
! 			case 0xc9:
! 			  dst->opcode = O (O_SYS_CLOSE, SB);
! 			  break;
! 			case 0xca:
! 			  dst->opcode = O (O_SYS_STAT, SB);
! 			  break;
! 			case 0xcb:
! 			  dst->opcode = O (O_SYS_FSTAT, SB);
! 			  break;
  			}
+ 		      /* End of Processing for system calls.  */
  		    }
  
  		  dst->next_pc = addr + len / 2;
*************** sim_resume (sd, step, siggnal)
*** 1392,1403 ****
  	    goto condtrue;
  	  goto next;
  
! 	case O (O_SYSCALL, SB):
  	  {
! 	    char c = cpu.regs[2];
! 	    sim_callback->write_stdout (sim_callback, &c, 1);
  	  }
  	  goto next;
  
  	  ONOT (O_NOT, rd = ~rd; v = 0;);
  	  OSHIFTS (O_SHLL,
--- 1415,1704 ----
  	    goto condtrue;
  	  goto next;
  
! 	  /* System call processing starts.  */
! 	case O (O_SYS_OPEN, SB):
  	  {
! 	    int len = 0;	/* Length of filename.  */
! 	    char *filename;	/* Filename would go here.  */
! 	    char temp_char;	/* Temporary character */
! 	    int mode = 0;	/* Mode bits for the file.  */
! 	    int open_return;	/* Return value of open, file descriptor.  */
! 	    int i;		/* Loop counter */
! 	    int filename_ptr;	/* Pointer to filename in cpu memory.  */
! 
! 	    /* Setting filename_ptr to first argument of open.  */
! 	    filename_ptr = h8300hmode ? GET_L_REG (0) : GET_W_REG (0);
! 
! 	    /* Trying to get mode.  */
! 	    if (h8300hmode || h8300smode)
! 	      {
! 		mode = GET_MEMORY_L (cpu.regs[7] + 4);
! 	      }
! 	    else
! 	      {
! 		mode = GET_MEMORY_W (cpu.regs[7] + 2);
! 	      }
! 
! 	    /* Trying to find the length of the filename.  */
! 	    temp_char = GET_MEMORY_B (cpu.regs[0]);
! 
! 	    len = 1;
! 	    while (temp_char != '\0')
! 	      {
! 		temp_char = GET_MEMORY_B (filename_ptr + len);
! 		len++;
! 	      }
! 
! 	    /* Allocating space for the filename.  */
! 	    filename = (char *) malloc (sizeof (char) * len);
! 
! 	    /* String copying the filename from memory.  */
! 	    for (i = 0; i < len; i++)
! 	      {
! 		temp_char = GET_MEMORY_B (filename_ptr + i);
! 		filename[i] = temp_char;
! 	      }
! 
! 	    /* Callback to open and return the file descriptor.  */
! 	    open_return = sim_callback->open (sim_callback, filename, mode);
! 
! 	    /* Return value in register 0.  */
! 	    cpu.regs[0] = open_return;
! 
! 	    /* Freeing memory used for filename. */
! 	    free (filename);
! 	  }
! 	  goto next;
! 
! 	case O (O_SYS_READ, SB):
! 	  {
! 	    char *char_ptr;	/* Where characters read would be stored.  */
! 	    int fd;		/* File descriptor */
! 	    int buf_size;	/* BUF_SIZE parameter in read.  */
! 	    int i = 0;		/* Temporary Loop counter */
! 	    int read_return = 0;	/* Return value from callback to
! 					   read.  */
! 
! 	    fd = h8300hmode ? GET_L_REG (0) : GET_W_REG (0);
! 	    buf_size = h8300hmode ? GET_L_REG (2) : GET_W_REG (2);
! 
! 	    char_ptr = (char *) malloc (sizeof (char) * buf_size);
! 
! 	    /* Callback to read and return the no. of characters read.  */
! 	    read_return =
! 	      sim_callback->read (sim_callback, fd, char_ptr, buf_size);
! 
! 	    /* The characters read are stored in cpu memory.  */
! 	    for (i = 0; i < buf_size; i++)
! 	      {
! 		SET_MEMORY_B ((cpu.regs[1] + (sizeof (char) * i)),
! 			      *(char_ptr + (sizeof (char) * i)));
! 	      }
! 
! 	    /* Return value in Register 0.  */
! 	    cpu.regs[0] = read_return;
! 
! 	    /* Freeing memory used as buffer.  */
! 	    free (char_ptr);
! 	  }
! 	  goto next;
! 
! 	case O (O_SYS_WRITE, SB):
! 	  {
! 	    int fd;		/* File descriptor */
! 	    char temp_char;	/* Temporary character */
! 	    int len;		/* Length of write, Parameter II to write.  */
! 	    int char_ptr;	/* Character Pointer, Parameter I of write.  */
! 	    char *ptr;		/* Where characters to be written are stored. 
! 				 */
! 	    int write_return;	/* Return value from callback to write.  */
! 	    int i = 0;		/* Loop counter */
! 
! 	    fd = h8300hmode ? GET_L_REG (0) : GET_W_REG (0);
! 	    char_ptr = h8300hmode ? GET_L_REG (1) : GET_W_REG (1);
! 	    len = h8300hmode ? GET_L_REG (2) : GET_W_REG (2);
! 
! 	    /* Allocating space for the characters to be written.  */
! 	    ptr = (char *) malloc (sizeof (char) * len);
! 
! 	    /* Fetching the characters from cpu memory.  */
! 	    for (i = 0; i < len; i++)
! 	      {
! 		temp_char = GET_MEMORY_B (char_ptr + i);
! 		ptr[i] = temp_char;
! 	      }
! 
! 	    /* Callback write and return the no. of characters written.  */
! 	    write_return = sim_callback->write (sim_callback, fd, ptr, len);
! 
! 	    /* Return value in Register 0.  */
! 	    cpu.regs[0] = write_return;
! 
! 	    /* Freeing memory used as buffer.  */
! 	    free (ptr);
! 	  }
! 	  goto next;
! 
! 	case O (O_SYS_LSEEK, SB):
! 	  {
! 	    int fd;		/* File descriptor */
! 	    int offset;		/* Offset */
! 	    int origin;		/* Origin */
! 	    int lseek_return;	/* Return value from callback to lseek.  */
! 
! 	    fd = h8300hmode ? GET_L_REG (0) : GET_W_REG (0);
! 	    offset = h8300hmode ? GET_L_REG (1) : GET_W_REG (1);
! 	    origin = h8300hmode ? GET_L_REG (2) : GET_W_REG (2);
! 
! 	    /* Callback lseek and return offset.  */
! 	    lseek_return =
! 	      sim_callback->lseek (sim_callback, fd, offset, origin);
! 
! 	    /* Return value in register 0.  */
! 	    cpu.regs[0] = lseek_return;
! 	  }
! 	  goto next;
! 
! 	case O (O_SYS_CLOSE, SB):
! 	  {
! 	    int fd;		/* File descriptor */
! 	    int close_return;	/* Return value from callback to close.  */
! 
! 	    fd = h8300hmode ? GET_L_REG (0) : GET_W_REG (0);
! 
! 	    /* Callback close and return.  */
! 	    close_return = sim_callback->close (sim_callback, fd);
! 
! 	    /* Return value in register 0.  */
! 	    cpu.regs[0] = close_return;
! 	  }
! 	  goto next;
! 
! 	case O (O_SYS_FSTAT, SB):
! 	  {
! 	    int fd;		/* File descriptor */
! 	    struct stat stat_rec;	/* Stat record */
! 	    int fstat_return;	/* Return value from callback to stat.  */
! 	    int stat_ptr;	/* Pointer to stat record.  */
! 	    char *temp_stat_ptr;	/* Temporary stat_rec pointer.  */
! 
! 	    fd = h8300hmode ? GET_L_REG (0) : GET_W_REG (0);
! 
! 	    /* Setting stat_ptr to second argument of stat.  */
! 	    /* stat_ptr = cpu.regs[1]; */
! 	    stat_ptr = h8300hmode ? GET_L_REG (1) : GET_W_REG (1);
! 
! 	    /* Callback stat and return.  */
! 	    fstat_return = sim_callback->fstat (sim_callback, fd, &stat_rec);
! 
! 	    /* Have stat_ptr point to starting of stat_rec.  */
! 	    temp_stat_ptr = (char *) (&stat_rec);
! 
! 	    /* Setting up the stat structure returned.  */
! 	    SET_MEMORY_W (stat_ptr, stat_rec.st_dev);
! 	    stat_ptr += 2;
! 	    SET_MEMORY_W (stat_ptr, stat_rec.st_ino);
! 	    stat_ptr += 2;
! 	    SET_MEMORY_L (stat_ptr, stat_rec.st_mode);
! 	    stat_ptr += 4;
! 	    SET_MEMORY_W (stat_ptr, stat_rec.st_nlink);
! 	    stat_ptr += 2;
! 	    SET_MEMORY_W (stat_ptr, stat_rec.st_uid);
! 	    stat_ptr += 2;
! 	    SET_MEMORY_W (stat_ptr, stat_rec.st_gid);
! 	    stat_ptr += 2;
! 	    SET_MEMORY_W (stat_ptr, stat_rec.st_rdev);
! 	    stat_ptr += 2;
! 	    SET_MEMORY_L (stat_ptr, stat_rec.st_size);
! 	    stat_ptr += 4;
! 	    SET_MEMORY_L (stat_ptr, stat_rec.st_atime);
! 	    stat_ptr += 8;
! 	    SET_MEMORY_L (stat_ptr, stat_rec.st_mtime);
! 	    stat_ptr += 8;
! 	    SET_MEMORY_L (stat_ptr, stat_rec.st_ctime);
! 
! 	    /* Return value in register 0.  */
! 	    cpu.regs[0] = fstat_return;
! 	  }
! 	  goto next;
! 
! 	case O (O_SYS_STAT, SB):
! 	  {
! 	    int len = 0;	/* Length of filename.  */
! 	    char *filename;	/* Filename would go here.  */
! 	    char temp_char;	/* Temporary character */
! 	    int filename_ptr;	/* Pointer to filename in cpu memory.  */
! 	    struct stat stat_rec;	/* Stat record */
! 	    int stat_return;	/* Return value from callback to stat */
! 	    int stat_ptr;	/* Pointer to stat record.  */
! 	    char *temp_stat_ptr;	/* Temporary stat_rec pointer.  */
! 	    int i = 0;		/* Loop Counter */
! 
! 	    /* Setting filename_ptr to first argument of open.  */
! 	    filename_ptr = h8300hmode ? GET_L_REG (0) : GET_W_REG (0);
! 
! 	    /* Trying to find the length of the filename.  */
! 	    temp_char = GET_MEMORY_B (cpu.regs[0]);
! 
! 	    len = 1;
! 	    while (temp_char != '\0')
! 	      {
! 		temp_char = GET_MEMORY_B (filename_ptr + len);
! 		len++;
! 	      }
! 
! 	    /* Allocating space for the filename.  */
! 	    filename = (char *) malloc (sizeof (char) * len);
! 
! 	    /* String copying the filename from memory.  */
! 	    for (i = 0; i < len; i++)
! 	      {
! 		temp_char = GET_MEMORY_B (filename_ptr + i);
! 		filename[i] = temp_char;
! 	      }
! 
! 	    /* Setting stat_ptr to second argument of stat.  */
! 	    /* stat_ptr = cpu.regs[1]; */
! 	    stat_ptr = h8300hmode ? GET_L_REG (1) : GET_W_REG (1);
! 
! 	    /* Callback stat and return.  */
! 	    stat_return =
! 	      sim_callback->stat (sim_callback, filename, &stat_rec);
! 
! 	    /* Have stat_ptr point to starting of stat_rec.  */
! 	    temp_stat_ptr = (char *) (&stat_rec);
! 
! 	    /* Freeing memory used for filename.  */
! 	    free (filename);
! 
! 	    /* Setting up the stat structure returned.  */
! 	    SET_MEMORY_W (stat_ptr, stat_rec.st_dev);
! 	    stat_ptr += 2;
! 	    SET_MEMORY_W (stat_ptr, stat_rec.st_ino);
! 	    stat_ptr += 2;
! 	    SET_MEMORY_L (stat_ptr, stat_rec.st_mode);
! 	    stat_ptr += 4;
! 	    SET_MEMORY_W (stat_ptr, stat_rec.st_nlink);
! 	    stat_ptr += 2;
! 	    SET_MEMORY_W (stat_ptr, stat_rec.st_uid);
! 	    stat_ptr += 2;
! 	    SET_MEMORY_W (stat_ptr, stat_rec.st_gid);
! 	    stat_ptr += 2;
! 	    SET_MEMORY_W (stat_ptr, stat_rec.st_rdev);
! 	    stat_ptr += 2;
! 	    SET_MEMORY_L (stat_ptr, stat_rec.st_size);
! 	    stat_ptr += 4;
! 	    SET_MEMORY_L (stat_ptr, stat_rec.st_atime);
! 	    stat_ptr += 8;
! 	    SET_MEMORY_L (stat_ptr, stat_rec.st_mtime);
! 	    stat_ptr += 8;
! 	    SET_MEMORY_L (stat_ptr, stat_rec.st_ctime);
! 
! 	    /* Return value in register 0.  */
! 	    cpu.regs[0] = stat_return;
  	  }
  	  goto next;
+ 	  /* End of system call processing.  */
  
  	  ONOT (O_NOT, rd = ~rd; v = 0;);
  	  OSHIFTS (O_SHLL,

[-- Attachment #10: newlib_patch.txt --]
[-- Type: text/plain, Size: 2541 bytes --]

*** newlib/libc/sys/h8300hms/syscalls.c.original	Sat Dec 28 16:37:10 2002
--- newlib/libc/sys/h8300hms/syscalls.c.modified	Tue Dec 31 14:15:44 2002
***************
*** 1,47 ****
  /* Operating system stubs, set up for the MRI simulator */
  
  #include <_ansi.h>
- #include <sys/types.h>
- #include <sys/stat.h>
  #include <errno.h>
  
  
- int _DEFUN(_lseek,(file, ptr, dir),
- 	  int file _AND
- 	  int ptr _AND
- 	  int dir)
- {
-   return 0;
- }
- 
- int _DEFUN(_close,(file),
- 	  int file)
- {
-   return -1;
- }
- 
  int isatty(file)
       int file;
  {
    return 1;
  }
  
- int _DEFUN(_fstat,(file, st),
- 	  int file _AND
- 	  struct stat *st)
- {
-   st->st_mode = S_IFCHR;
-   return 0;
- }
- 
- int
- _open (path, flags)
-      const char *path;
-      int flags;
- {
-   return 0;
- }
- 
  int
  _unlink (path)
       const char *path;
--- 1,16 ----
  /* Operating system stubs, set up for the MRI simulator */
  
  #include <_ansi.h>
  #include <errno.h>
+ #include "sys/syscall.h"
  
  
  int isatty(file)
       int file;
  {
    return 1;
  }
  
  int
  _unlink (path)
       const char *path;
*** newlib/libc/sys/h8300hms/Makefile.in.original	Mon Dec 30 16:07:12 2002
--- newlib/libc/sys/h8300hms/Makefile.in.modified	Tue Dec 31 14:29:23 2002
*************** INCLUDES = $(NEWLIB_CFLAGS) $(CROSS_CFLA
*** 89,95 ****
  
  noinst_LIBRARIES = lib.a
  
! lib_a_SOURCES = syscalls.c write.c _exit.c read.c sbrk.c misc.c crt1.c
  
  ACLOCAL_AMFLAGS = -I ../../..
  CONFIG_STATUS_DEPENDENCIES = $(newlib_basedir)/configure.host
--- 89,96 ----
  
  noinst_LIBRARIES = lib.a
  
! lib_a_SOURCES = syscalls.c open.s read.s write.s lseek.s close.s stat.s \
! fstat.s _exit.c sbrk.c misc.c crt1.c
  
  ACLOCAL_AMFLAGS = -I ../../..
  CONFIG_STATUS_DEPENDENCIES = $(newlib_basedir)/configure.host
*************** DEFS = @DEFS@ -I. -I$(srcdir) 
*** 103,109 ****
  CPPFLAGS = @CPPFLAGS@
  LIBS = @LIBS@
  lib_a_LIBADD = 
! lib_a_OBJECTS =  syscalls.o write.o _exit.o read.o sbrk.o misc.o crt1.o
  CFLAGS = @CFLAGS@
  COMPILE = $(CC) $(DEFS) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
  CCLD = $(CC)
--- 104,111 ----
  CPPFLAGS = @CPPFLAGS@
  LIBS = @LIBS@
  lib_a_LIBADD = 
! lib_a_OBJECTS = syscalls.o open.o read.o write.o lseek.o close.o stat.o \
! fstat.o _exit.o sbrk.o misc.o crt1.o
  CFLAGS = @CFLAGS@
  COMPILE = $(CC) $(DEFS) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
  CCLD = $(CC)

[-- Attachment #11: ChangeLog.txt --]
[-- Type: text/plain, Size: 1314 bytes --]

2002-12-31  D.Venkatasubramanian <dvenkat@noida.hcltech.com>

	* compile.c (decode): Added code for some more magic traps.
	* compile.c (sim_resume): Added support for File I/O system
	calls through callback to host_system.
	System calls provided support for :
	open, read, write, lseek, close, stat, fstat
	Only basic support for stat and fstat.


2002-12-31   D.Venkatasubramanian <dvenkat@noida.hcltech.com>

	* /libc/sys/h8300hms/syscalls.c: Removed functions _open, 
	_lseek, _close, _stat, _fstat.
	* /libc/sys/h8300hms/read.c: Removed.
	* /libc/sys/h8300hms/write.c: Removed.
	* /libc/sys/h8300hms/open.S: Hand coded assembly for 
	implementing _open removed from syscalls.c.
	* /libc/sys/h8300hms/read.S: Hand coded assembly for 
	implementing _read removed from read.c.
	* /libc/sys/h8300hms/write.S: Hand coded assembly for 
	implementing _write removed from write.c.
	* /libc/sys/h8300hms/lseek.S: Hand coded assembly for 
	implementing _lseek removed from syscalls.c.
	* /libc/sys/h8300hms/close.S: Hand coded assembly for 
	implementing _close removed from syscalls.c.
	* /libc/sys/h8300hms/fstat.S: Hand coded assembly for 
	implementing _fstat removed from syscalls.c.
	* /libc/sys/h8300hms/stat.S: Hand coded assembly for 
	implementing _stat removed from syscalls.c.