From bf174226850a93081729230f70a106f28ee3afde Mon Sep 17 00:00:00 2001 From: "D.Venkatasubramanian" Date: Fri, 14 Mar 2003 04:12:01 +0000 Subject: [PATCH] File I/O Support added. 2003-03-14 D.Venkatasubramanian * 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. --- sim/h8300/ChangeLog | 9 ++ sim/h8300/compile.c | 313 +++++++++++++++++++++++++++++++++++++++++++++++++++- 2 files changed, 316 insertions(+), 6 deletions(-) diff --git a/sim/h8300/ChangeLog b/sim/h8300/ChangeLog index 0e62569..6526a55 100644 --- a/sim/h8300/ChangeLog +++ b/sim/h8300/ChangeLog @@ -1,3 +1,12 @@ +2003-03-14 D.Venkatasubramanian + + * 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. + 2003-02-27 Andrew Cagney * compile.c (sim_open, sim_create_inferior): Rename _bfd to bfd. diff --git a/sim/h8300/compile.c b/sim/h8300/compile.c index cd60b86..eb2a03f 100644 --- a/sim/h8300/compile.c +++ b/sim/h8300/compile.c @@ -35,6 +35,8 @@ #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 @@ -447,14 +449,36 @@ 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; } + /* End of Processing for system calls. */ } dst->next_pc = addr + len / 2; @@ -1386,12 +1410,289 @@ sim_resume (SIM_DESC sd, int step, int siggnal) 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, -- 2.7.4