#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
dst->opcode = q->how;
dst->cycles = q->time;
- /* And a jsr to 0xc4 is turned into a magic trap. */
+ /* And a jsr to these locations are turned into magic
+ traps. */
if (dst->opcode == O (O_JSR, SB))
{
- if (dst->src.literal == 0xc4)
+ switch (dst->src.literal)
{
- dst->opcode = O (O_SYSCALL, SB);
+ 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;
goto condtrue;
goto next;
- case O (O_SYSCALL, SB):
+ /* System call processing starts. */
+ case O (O_SYS_OPEN, SB):
{
- char c = cpu.regs[2];
- sim_callback->write_stdout (sim_callback, &c, 1);
+ 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 = 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,
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