#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
}
}
+static int
+cmdline_location()
+{
+ if (h8300smode)
+ return 0xffff00L;
+ else if (h8300hmode)
+ return 0x2ff00L;
+ else
+ return 0xff00L;
+}
+
static unsigned int
decode (int addr, unsigned char *data, decoded_inst *dst)
{
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;
+ case 0xcc:
+ dst->opcode = O (O_SYS_CMDLINE, SB);
+ break;
}
+ /* End of Processing for system calls. */
}
dst->next_pc = addr + len / 2;
}
p++;
}
+ wreg[i] = wreg[i + 8] = 0;
while (q < u)
{
if (*q == 0x2233)
}
q++;
}
+ if (wreg[i] == 0 || wreg[i + 8] == 0)
+ abort ();
cpu.regs[i] = 0;
lreg[i] = &cpu.regs[i];
}
goto condtrue;
goto next;
- case O (O_SYSCALL, SB):
+ /* Trap for Command Line setup. */
+ case O (O_SYS_CMDLINE, SB):
{
- char c = cpu.regs[2];
- sim_callback->write_stdout (sim_callback, &c, 1);
+ int i = 0; /* Loop counter. */
+ int j = 0; /* Loop counter. */
+ int ind_arg_len = 0; /* Length of each argument. */
+ int no_of_args = 0; /* The no. or cmdline args. */
+ int current_location = 0; /* Location of string. */
+ int old_sp = 0; /* The Initial Stack Pointer. */
+ int no_of_slots = 0; /* No. of slots required on the stack
+ for storing cmdline args. */
+ int sp_move = 0; /* No. of locations by which the stack needs
+ to grow. */
+ int new_sp = 0; /* The final stack pointer location passed
+ back. */
+ int *argv_ptrs; /* Pointers of argv strings to be stored. */
+ int argv_ptrs_location = 0; /* Location of pointers to cmdline
+ args on the stack. */
+ int char_ptr_size = 0; /* Size of a character pointer on
+ target machine. */
+ int addr_cmdline = 0; /* Memory location where cmdline has
+ to be stored. */
+ int size_cmdline = 0; /* Size of cmdline. */
+
+ /* Set the address of 256 free locations where command line is
+ stored. */
+ addr_cmdline = cmdline_location();
+ cpu.regs[0] = addr_cmdline;
+
+ /* Counting the no. of commandline arguments. */
+ for (i = 0; ptr_command_line[i] != NULL; i++)
+ continue;
+
+ /* No. of arguments in the command line. */
+ no_of_args = i;
+
+ /* Current location is just a temporary variable,which we are
+ setting to the point to the start of our commandline string. */
+ current_location = addr_cmdline;
+
+ /* Allocating space for storing pointers of the command line
+ arguments. */
+ argv_ptrs = (int *) malloc (sizeof (int) * no_of_args);
+
+ /* Setting char_ptr_size to the sizeof (char *) on the different
+ architectures. */
+ if (h8300hmode || h8300smode)
+ {
+ char_ptr_size = 4;
+ }
+ else
+ {
+ char_ptr_size = 2;
+ }
+
+ for (i = 0; i < no_of_args; i++)
+ {
+ ind_arg_len = 0;
+
+ /* The size of the commandline argument. */
+ ind_arg_len = (strlen (ptr_command_line[i]) + 1);
+
+ /* The total size of the command line string. */
+ size_cmdline += ind_arg_len;
+
+ /* As we have only 256 bytes, we need to provide a graceful
+ exit. Anyways, a program using command line arguments
+ where we cannot store all the command line arguments
+ given may behave unpredictably. */
+ if (size_cmdline >= 256)
+ {
+ cpu.regs[0] = 0;
+ goto next;
+ }
+ else
+ {
+ /* current_location points to the memory where the next
+ commandline argument is stored. */
+ argv_ptrs[i] = current_location;
+ for (j = 0; j < ind_arg_len; j++)
+ {
+ SET_MEMORY_B ((current_location +
+ (sizeof (char) * j)),
+ *(ptr_command_line[i] +
+ sizeof (char) * j));
+ }
+
+ /* Setting current_location to the starting of next
+ argument. */
+ current_location += ind_arg_len;
+ }
+ }
+
+ /* This is the original position of the stack pointer. */
+ old_sp = cpu.regs[7];
+
+ /* We need space from the stack to store the pointers to argvs. */
+ /* As we will infringe on the stack, we need to shift the stack
+ pointer so that the data is not overwritten. We calculate how
+ much space is required. */
+ sp_move = (no_of_args) * (char_ptr_size);
+
+ /* The final position of stack pointer, we have thus taken some
+ space from the stack. */
+ new_sp = old_sp - sp_move;
+
+ /* Temporary variable holding value where the argv pointers need
+ to be stored. */
+ argv_ptrs_location = new_sp;
+
+ /* The argv pointers are stored at sequential locations. As per
+ the H8300 ABI. */
+ for (i = 0; i < no_of_args; i++)
+ {
+ /* Saving the argv pointer. */
+ if (h8300hmode || h8300smode)
+ {
+ SET_MEMORY_L (argv_ptrs_location, argv_ptrs[i]);
+ }
+ else
+ {
+ SET_MEMORY_W (argv_ptrs_location, argv_ptrs[i]);
+ }
+
+ /* The next location where the pointer to the next argv
+ string has to be stored. */
+ argv_ptrs_location += char_ptr_size;
+ }
+
+ /* Required by POSIX, Setting 0x0 at the end of the list of argv
+ pointers. */
+ if (h8300hmode || h8300smode)
+ {
+ SET_MEMORY_L (old_sp, 0x0);
+ }
+ else
+ {
+ SET_MEMORY_W (old_sp, 0x0);
+ }
+
+ /* Freeing allocated memory. */
+ free (argv_ptrs);
+ for (i = 0; i <= no_of_args; i++)
+ {
+ free (ptr_command_line[i]);
+ }
+ free (ptr_command_line);
+
+ /* The no. of argv arguments are returned in Reg 0. */
+ cpu.regs[0] = no_of_args;
+ /* The Pointer to argv in Register 1. */
+ cpu.regs[1] = new_sp;
+ /* Setting the stack pointer to the new value. */
+ cpu.regs[7] = new_sp;
+ }
+ 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 = 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,
c = rd & hm; v = 0; rd <<= 1,
OBITOP (O_BIAND, 1, 0, c = !(ea & m) && C);
OBITOP (O_BOR, 1, 0, c = (ea & m) || C);
OBITOP (O_BIOR, 1, 0, c = !(ea & m) || C);
- OBITOP (O_BXOR, 1, 0, c = (ea & m) != C);
+ OBITOP (O_BXOR, 1, 0, c = ((ea & m) != 0) != C);
OBITOP (O_BIXOR, 1, 0, c = !(ea & m) != C);
#define MOP(bsize, signed) \
goto next;
}
case O (O_EXTS, SW):
- rd = GET_B_REG (code->src.reg + 8) & 0xff; /* Yes, src, not dst. */
+ rd = GET_W_REG (code->src.reg) & 0xff; /* Yes, src, not dst. */
ea = rd & 0x80 ? -256 : 0;
res = rd + ea;
goto log16;
res = rd + ea;
goto log32;
case O (O_EXTU, SW):
- rd = GET_B_REG (code->src.reg + 8) & 0xff;
+ rd = GET_W_REG (code->src.reg) & 0xff;
ea = 0;
res = rd + ea;
goto log16;
}
goto next;
+ case O (O_DAA, SB):
+ /* Decimal Adjust Addition. This is for BCD arithmetic. */
+ res = GET_B_REG (code->src.reg);
+ if (!c && (0 <= (res >> 4) && (res >> 4) <= 9)
+ && !h && (0 <= (res & 0xf) && (res & 0xf) <= 9))
+ res = res; /* Value added == 0. */
+ else if (!c && (0 <= (res >> 4) && (res >> 4) <= 8)
+ && !h && (10 <= (res & 0xf) && (res & 0xf) <= 15))
+ res = res + 0x6; /* Value added == 6. */
+ else if (!c && (0 <= (res >> 4) && (res >> 4) <= 9)
+ && h && (0 <= (res & 0xf) && (res & 0xf) <= 3))
+ res = res + 0x6; /* Value added == 6. */
+ else if (!c && (10 <= (res >> 4) && (res >> 4) <= 15)
+ && !h && (0 <= (res & 0xf) && (res & 0xf) <= 9))
+ res = res + 0x60; /* Value added == 60. */
+ else if (!c && (9 <= (res >> 4) && (res >> 4) <= 15)
+ && !h && (10 <= (res & 0xf) && (res & 0xf) <= 15))
+ res = res + 0x66; /* Value added == 66. */
+ else if (!c && (10 <= (res >> 4) && (res >> 4) <= 15)
+ && h && (0 <= (res & 0xf) && (res & 0xf) <= 3))
+ res = res + 0x66; /* Value added == 66. */
+ else if (c && (1 <= (res >> 4) && (res >> 4) <= 2)
+ && !h && (0 <= (res & 0xf) && (res & 0xf) <= 9))
+ res = res + 0x160; /* Value added == 60, plus 'carry'. */
+ else if (c && (1 <= (res >> 4) && (res >> 4) <= 2)
+ && !h && (10 <= (res & 0xf) && (res & 0xf) <= 15))
+ res = res + 0x166; /* Value added == 66, plus 'carry'. */
+ else if (c && (1 <= (res >> 4) && (res >> 4) <= 3)
+ && h && (0 <= (res & 0xf) && (res & 0xf) <= 3))
+ res = res + 0x166; /* Value added == 66, plus 'carry'. */
+
+ goto alu8;
+
+ case O (O_DAS, SB):
+ /* Decimal Adjust Subtraction. This is for BCD arithmetic. */
+ res = GET_B_REG (code->src.reg); /* FIXME fetch, fetch2... */
+ if (!c && (0 <= (res >> 4) && (res >> 4) <= 9)
+ && !h && (0 <= (res & 0xf) && (res & 0xf) <= 9))
+ res = res; /* Value added == 0. */
+ else if (!c && (0 <= (res >> 4) && (res >> 4) <= 8)
+ && h && (6 <= (res & 0xf) && (res & 0xf) <= 15))
+ res = res + 0xfa; /* Value added == 0xfa. */
+ else if (c && (7 <= (res >> 4) && (res >> 4) <= 15)
+ && !h && (0 <= (res & 0xf) && (res & 0xf) <= 9))
+ res = res + 0xa0; /* Value added == 0xa0. */
+ else if (c && (6 <= (res >> 4) && (res >> 4) <= 15)
+ && h && (6 <= (res & 0xf) && (res & 0xf) <= 15))
+ res = res + 0x9a; /* Value added == 0x9a. */
+
+ goto alu8;
+
default:
illegal:
cpu.state = SIM_STATE_STOPPED;
SIM_DESC
sim_open (SIM_OPEN_KIND kind,
struct host_callback_struct *ptr,
- struct _bfd *abfd,
+ struct bfd *abfd,
char **argv)
{
/* FIXME: Much of the code in sim_load can be moved here. */
}
SIM_RC
-sim_create_inferior (SIM_DESC sd, struct _bfd *abfd, char **argv, char **env)
+sim_create_inferior (SIM_DESC sd, struct bfd *abfd, char **argv, char **env)
{
+ int i = 0;
+ int len_arg = 0;
+ int no_of_args = 0;
+
if (abfd != NULL)
cpu.pc = bfd_get_start_address (abfd);
else
cpu.pc = 0;
+
+ /* Command Line support. */
+ if (argv != NULL)
+ {
+ /* Counting the no. of commandline arguments. */
+ for (no_of_args = 0; argv[no_of_args] != NULL; no_of_args++)
+ continue;
+
+ /* Allocating memory for the argv pointers. */
+ ptr_command_line = (char **) malloc ((sizeof (char *))
+ * (no_of_args + 1));
+
+ for (i = 0; i < no_of_args; i++)
+ {
+ /* Calculating the length of argument for allocating memory. */
+ len_arg = strlen (argv[i] + 1);
+ ptr_command_line[i] = (char *) malloc (sizeof (char) * len_arg);
+ /* Copying the argument string. */
+ ptr_command_line[i] = (char *) strdup (argv[i]);
+ }
+ ptr_command_line[i] = NULL;
+ }
+
return SIM_RC_OK;
}
projects / binutils-gdb.git / blobdiff