686 lines
15 KiB
C
686 lines
15 KiB
C
/*+M*************************************************************************
|
|
* Adaptec AIC7770/AIC7870 sequencer code assembler.
|
|
*
|
|
* Copyright (c) 1994 John Aycock
|
|
* The University of Calgary Department of Computer Science.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions, and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of Calgary
|
|
* Department of Computer Science and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* Comments are started by `#' and continue to the end of the line; lines
|
|
* may be of the form:
|
|
* <label>*
|
|
* <label>* <undef-sym> = <value>
|
|
* <label>* <opcode> <operand>*
|
|
*
|
|
* A <label> is an <undef-sym> ending in a colon. Spaces, tabs, and commas
|
|
* are token separators.
|
|
*
|
|
*-M*************************************************************************/
|
|
static char id[] = "$Id: aic7xxx_asm.c,v 1.11 1996/01/05 01:48:07 gibbs Exp $";
|
|
#include <ctype.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
|
|
#define MEMORY 448
|
|
#define MAXLINE 1024
|
|
#define MAXTOKEN 32
|
|
#define ADOTOUT "a.out"
|
|
#define NOVALUE -1
|
|
|
|
/*
|
|
* AIC-7770/AIC-7870 register definitions
|
|
*/
|
|
#define R_SINDEX 0x65
|
|
#define R_ALLONES 0x69
|
|
#define R_ALLZEROS 0x6a
|
|
#define R_NONE 0x6a
|
|
|
|
int debug;
|
|
int lineno, LC;
|
|
char *filename;
|
|
unsigned char M[MEMORY][4];
|
|
|
|
void
|
|
error(char *s)
|
|
{
|
|
fprintf(stderr, "%s: %s at line %d\n", filename, s, lineno);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
void *
|
|
Malloc(size_t size)
|
|
{
|
|
void *p = malloc(size);
|
|
if (!p)
|
|
error("out of memory");
|
|
return(p);
|
|
}
|
|
|
|
void *
|
|
Realloc(void *ptr, size_t size)
|
|
{
|
|
void *p = realloc(ptr, size);
|
|
if (!p)
|
|
error("out of memory");
|
|
return(p);
|
|
}
|
|
|
|
char *
|
|
Strdup(char *s)
|
|
{
|
|
char *p = (char *)Malloc(strlen(s) + 1);
|
|
strcpy(p, s);
|
|
return(p);
|
|
}
|
|
|
|
typedef struct sym_t {
|
|
struct sym_t *next; /* MUST BE FIRST */
|
|
char *name;
|
|
int value;
|
|
int npatch;
|
|
int *patch;
|
|
} sym_t;
|
|
|
|
sym_t *head;
|
|
|
|
void
|
|
define(char *name, int value)
|
|
{
|
|
sym_t *p, *q;
|
|
|
|
for (p = head, q = (sym_t *)&head; p; p = p->next) {
|
|
if (!strcmp(p->name, name))
|
|
error("redefined symbol");
|
|
q = p;
|
|
}
|
|
|
|
p = q->next = (sym_t *)Malloc(sizeof(sym_t));
|
|
p->next = NULL;
|
|
p->name = Strdup(name);
|
|
p->value = value;
|
|
p->npatch = 0;
|
|
p->patch = NULL;
|
|
|
|
if (debug) {
|
|
fprintf(stderr, "\"%s\" ", p->name);
|
|
if (p->value != NOVALUE)
|
|
fprintf(stderr, "defined as 0x%x\n", p->value);
|
|
else
|
|
fprintf(stderr, "undefined\n");
|
|
}
|
|
}
|
|
|
|
sym_t *
|
|
lookup(char *name)
|
|
{
|
|
sym_t *p;
|
|
|
|
for (p = head; p; p = p->next)
|
|
if (!strcmp(p->name, name))
|
|
return(p);
|
|
return(NULL);
|
|
}
|
|
|
|
void
|
|
patch(sym_t *p, int location)
|
|
{
|
|
p->npatch += 1;
|
|
p->patch = (int *)Realloc(p->patch, p->npatch * sizeof(int *));
|
|
|
|
p->patch[p->npatch - 1] = location;
|
|
}
|
|
|
|
void backpatch(void)
|
|
{
|
|
int i;
|
|
sym_t *p;
|
|
|
|
for (p = head; p; p = p->next) {
|
|
|
|
if (p->value == NOVALUE) {
|
|
fprintf(stderr,
|
|
"%s: undefined symbol \"%s\"\n",
|
|
filename, p->name);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
if (p->npatch) {
|
|
if (debug)
|
|
fprintf(stderr,
|
|
"\"%s\" (0x%x) patched at",
|
|
p->name, p->value);
|
|
|
|
for (i = 0; i < p->npatch; i++) {
|
|
M[p->patch[i]][0] &= ~1;
|
|
M[p->patch[i]][0] |= ((p->value >> 8) & 1);
|
|
M[p->patch[i]][1] = p->value & 0xff;
|
|
|
|
if (debug)
|
|
fprintf(stderr, " 0x%x", p->patch[i]);
|
|
}
|
|
|
|
if (debug)
|
|
fputc('\n', stderr);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Output words in byte-reversed order (least significant first)
|
|
* since the sequencer RAM is loaded that way.
|
|
*/
|
|
void
|
|
output(FILE *fp)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < LC; i++)
|
|
fprintf(fp, "\t0x%02x, 0x%02x, 0x%02x, 0x%02x,\n",
|
|
M[i][3],
|
|
M[i][2],
|
|
M[i][1],
|
|
M[i][0]);
|
|
printf("%d out of %d instructions used.\n", LC, MEMORY);
|
|
}
|
|
|
|
char **
|
|
getl(int *n)
|
|
{
|
|
int i;
|
|
char *p, *quote;
|
|
static char buf[MAXLINE];
|
|
static char *a[MAXTOKEN];
|
|
|
|
i = 0;
|
|
|
|
while (fgets(buf, sizeof(buf), stdin)) {
|
|
|
|
lineno += 1;
|
|
|
|
if (buf[strlen(buf)-1] != '\n')
|
|
error("line too long");
|
|
|
|
p = strchr(buf, '#');
|
|
if (p)
|
|
*p = '\0';
|
|
p = buf;
|
|
rescan:
|
|
quote = strchr(p, '\"');
|
|
if (quote)
|
|
*quote = '\0';
|
|
for (p = strtok(p, ", \t\n"); p; p = strtok(NULL, ", \t\n"))
|
|
if (i < MAXTOKEN-1)
|
|
a[i++] = p;
|
|
else
|
|
error("too many tokens");
|
|
if (quote) {
|
|
quote++;
|
|
p = strchr(quote, '\"');
|
|
if (!p)
|
|
error("unterminated string constant");
|
|
else if (i < MAXTOKEN-1) {
|
|
a[i++] = quote;
|
|
*p = '\0';
|
|
p++;
|
|
}
|
|
else
|
|
error("too many tokens");
|
|
goto rescan;
|
|
}
|
|
if (i) {
|
|
*n = i;
|
|
return(a);
|
|
}
|
|
}
|
|
return(NULL);
|
|
}
|
|
|
|
#define A 0x8000 /* `A'ccumulator ok */
|
|
#define I 0x4000 /* use as immediate value */
|
|
#define SL 0x2000 /* shift left */
|
|
#define SR 0x1000 /* shift right */
|
|
#define RL 0x0800 /* rotate left */
|
|
#define RR 0x0400 /* rotate right */
|
|
#define LO 0x8000 /* lookup: ori-{jmp,jc,jnc,call} */
|
|
#define LA 0x4000 /* lookup: and-{jz,jnz} */
|
|
#define LX 0x2000 /* lookup: xor-{je,jne} */
|
|
#define NA -1 /* not applicable */
|
|
|
|
struct {
|
|
char *name;
|
|
int n; /* number of operands, including opcode */
|
|
unsigned int op; /* immediate or L?|pos_from_0 */
|
|
unsigned int dest; /* NA, pos_from_0, or I|immediate */
|
|
unsigned int src; /* NA, pos_from_0, or I|immediate */
|
|
unsigned int imm; /* pos_from_0, A|pos_from_0, or I|immediate */
|
|
unsigned int addr; /* NA or pos_from_0 */
|
|
int fmt; /* instruction format - 1, 2, or 3 */
|
|
} instr[] = {
|
|
/*
|
|
* N OP DEST SRC IMM ADDR FMT
|
|
*/
|
|
{ "mov", 3, 1, 1, 2, I|0xff, NA, 1 },
|
|
{ "mov", 4, LO|2, NA, 1, I|0, 3, 3 },
|
|
{ "mvi", 3, 0, 1, I|R_ALLZEROS, A|2, NA, 1 },
|
|
{ "mvi", 4, LO|2, NA, I|R_ALLZEROS, 1, 3, 3 },
|
|
{ "not", 2, 2, 1, 1, I|0xff, NA, 1 },
|
|
{ "and", 3, 1, 1, 1, A|2, NA, 1 },
|
|
{ "and", 4, 1, 1, 3, A|2, NA, 1 },
|
|
{ "or", 3, 0, 1, 1, A|2, NA, 1 },
|
|
{ "or", 4, 0, 1, 3, A|2, NA, 1 },
|
|
{ "or", 5, LO|3, NA, 1, 2, 4, 3 },
|
|
{ "xor", 3, 2, 1, 1, A|2, NA, 1 },
|
|
{ "xor", 4, 2, 1, 3, A|2, NA, 1 },
|
|
{ "nop", 1, 1, I|R_NONE, I|R_ALLZEROS, I|0xff, NA, 1 },
|
|
{ "inc", 2, 3, 1, 1, I|1, NA, 1 },
|
|
{ "inc", 3, 3, 1, 2, I|1, NA, 1 },
|
|
{ "dec", 2, 3, 1, 1, I|0xff, NA, 1 },
|
|
{ "dec", 3, 3, 1, 2, I|0xff, NA, 1 },
|
|
{ "jmp", 2, LO|0, NA, I|R_SINDEX, I|0, 1, 3 },
|
|
{ "jc", 2, LO|0, NA, I|R_SINDEX, I|0, 1, 3 },
|
|
{ "jnc", 2, LO|0, NA, I|R_SINDEX, I|0, 1, 3 },
|
|
{ "call", 2, LO|0, NA, I|R_SINDEX, I|0, 1, 3 },
|
|
{ "test", 5, LA|3, NA, 1, A|2, 4, 3 },
|
|
{ "cmp", 5, LX|3, NA, 1, A|2, 4, 3 },
|
|
{ "ret", 1, 1, I|R_NONE, I|R_ALLZEROS, I|0xff, NA, 1 },
|
|
{ "ret", 1, 1, I|R_NONE, I|R_ALLZEROS, I|0xff, NA, 1 },
|
|
{ "clc", 1, 3, I|R_NONE, I|R_ALLZEROS, I|1, NA, 1 },
|
|
{ "clc", 4, 3, 2, I|R_ALLZEROS, A|3, NA, 1 },
|
|
{ "stc", 2, 3, 1, I|R_ALLONES, I|1, NA, 1 },
|
|
{ "add", 3, 3, 1, 1, A|2, NA, 1 },
|
|
{ "add", 4, 3, 1, 3, A|2, NA, 1 },
|
|
{ "adc", 3, 4, 1, 1, A|2, NA, 1 },
|
|
{ "adc", 4, 4, 1, 3, A|2, NA, 1 },
|
|
{ "shl", 3, 5, 1, 1, SL|2, NA, 2 },
|
|
{ "shl", 4, 5, 1, 2, SL|3, NA, 2 },
|
|
{ "shr", 3, 5, 1, 1, SR|2, NA, 2 },
|
|
{ "shr", 4, 5, 1, 2, SR|3, NA, 2 },
|
|
{ "rol", 3, 5, 1, 1, RL|2, NA, 2 },
|
|
{ "rol", 4, 5, 1, 2, RL|3, NA, 2 },
|
|
{ "ror", 3, 5, 1, 1, RR|2, NA, 2 },
|
|
{ "ror", 4, 5, 1, 2, RR|3, NA, 2 },
|
|
/*
|
|
* Extensions (note also that mvi allows A)
|
|
*/
|
|
{ "clr", 2, 1, 1, I|R_ALLZEROS, I|0xff, NA, 1 },
|
|
{ 0, 0, 0, 0, 0, 0, 0, 0 }
|
|
};
|
|
|
|
int
|
|
eval_operand(char **a, int spec)
|
|
{
|
|
int i;
|
|
unsigned int want = spec & (LO|LA|LX);
|
|
|
|
static struct {
|
|
unsigned int what;
|
|
char *name;
|
|
int value;
|
|
} jmptab[] = {
|
|
{ LO, "jmp", 8 },
|
|
{ LO, "jc", 9 },
|
|
{ LO, "jnc", 10 },
|
|
{ LO, "call", 11 },
|
|
{ LA, "jz", 15 },
|
|
{ LA, "jnz", 13 },
|
|
{ LX, "je", 14 },
|
|
{ LX, "jne", 12 },
|
|
};
|
|
|
|
spec &= ~(LO|LA|LX);
|
|
|
|
for (i = 0; i < sizeof(jmptab)/sizeof(jmptab[0]); i++)
|
|
if (jmptab[i].what == want &&
|
|
!strcmp(jmptab[i].name, a[spec]))
|
|
{
|
|
return(jmptab[i].value);
|
|
}
|
|
|
|
if (want)
|
|
error("invalid jump");
|
|
|
|
return(spec); /* "case 0" - no flags set */
|
|
}
|
|
|
|
int
|
|
eval_sdi(char **a, int spec)
|
|
{
|
|
sym_t *p;
|
|
unsigned val;
|
|
|
|
if (spec == NA)
|
|
return(NA);
|
|
|
|
switch (spec & (A|I|SL|SR|RL|RR)) {
|
|
case SL:
|
|
case SR:
|
|
case RL:
|
|
case RR:
|
|
if (isdigit(*a[spec &~ (SL|SR|RL|RR)]))
|
|
val = strtol(a[spec &~ (SL|SR|RL|RR)], NULL, 0);
|
|
else {
|
|
p = lookup(a[spec &~ (SL|SR|RL|RR)]);
|
|
if (!p)
|
|
error("undefined symbol used");
|
|
val = p->value;
|
|
}
|
|
|
|
switch (spec & (SL|SR|RL|RR)) { /* blech */
|
|
case SL:
|
|
if (val > 7)
|
|
return(0xf0);
|
|
return(((val % 8) << 4) |
|
|
(val % 8));
|
|
case SR:
|
|
if (val > 7)
|
|
return(0xf0);
|
|
return(((val % 8) << 4) |
|
|
(1 << 3) |
|
|
((8 - (val % 8)) % 8));
|
|
case RL:
|
|
return(val % 8);
|
|
case RR:
|
|
return((8 - (val % 8)) % 8);
|
|
}
|
|
case I:
|
|
return(spec &~ I);
|
|
case A:
|
|
/*
|
|
* An immediate field of zero selects
|
|
* the accumulator. Vigorously object
|
|
* if zero is given otherwise - it's
|
|
* most likely an error.
|
|
*/
|
|
spec &= ~A;
|
|
if (!strcmp("A", a[spec]))
|
|
return(0);
|
|
if (isdigit(*a[spec]) &&
|
|
strtol(a[spec], NULL, 0) == 0)
|
|
{
|
|
error("immediate value of zero selects accumulator");
|
|
}
|
|
/* falls through */
|
|
case 0:
|
|
if (isdigit(*a[spec]))
|
|
return(strtol(a[spec], NULL, 0));
|
|
p = lookup(a[spec]);
|
|
if (p)
|
|
return(p->value);
|
|
error("undefined symbol used");
|
|
}
|
|
|
|
return(NA); /* shut the compiler up */
|
|
}
|
|
|
|
int
|
|
eval_addr(char **a, int spec)
|
|
{
|
|
sym_t *p;
|
|
|
|
if (spec == NA)
|
|
return(NA);
|
|
if (isdigit(*a[spec]))
|
|
return(strtol(a[spec], NULL, 0));
|
|
|
|
p = lookup(a[spec]);
|
|
|
|
if (p) {
|
|
if (p->value != NOVALUE)
|
|
return(p->value);
|
|
patch(p, LC);
|
|
} else {
|
|
define(a[spec], NOVALUE);
|
|
p = lookup(a[spec]);
|
|
patch(p, LC);
|
|
}
|
|
|
|
return(NA); /* will be patched in later */
|
|
}
|
|
|
|
int
|
|
crack(char **a, int n)
|
|
{
|
|
int i;
|
|
int I_imm, I_addr;
|
|
int I_op, I_dest, I_src, I_ret;
|
|
|
|
/*
|
|
* Check for "ret" at the end of the line; remove
|
|
* it unless it's "ret" alone - we still want to
|
|
* look it up in the table.
|
|
*/
|
|
I_ret = (strcmp(a[n-1], "ret") ? 0 : !0);
|
|
if (I_ret && n > 1)
|
|
n -= 1;
|
|
|
|
for (i = 0; instr[i].name; i++) {
|
|
/*
|
|
* Look for match in table given constraints,
|
|
* currently just the name and the number of
|
|
* operands.
|
|
*/
|
|
if (!strcmp(instr[i].name, *a) && instr[i].n == n)
|
|
break;
|
|
}
|
|
if (!instr[i].name)
|
|
error("unknown opcode or wrong number of operands");
|
|
|
|
I_op = eval_operand(a, instr[i].op);
|
|
I_src = eval_sdi(a, instr[i].src);
|
|
I_imm = eval_sdi(a, instr[i].imm);
|
|
I_dest = eval_sdi(a, instr[i].dest);
|
|
I_addr = eval_addr(a, instr[i].addr);
|
|
|
|
if( LC >= MEMORY )
|
|
error("Memory exhausted!\n");
|
|
|
|
switch (instr[i].fmt) {
|
|
case 1:
|
|
case 2:
|
|
M[LC][0] = (I_op << 1) | I_ret;
|
|
M[LC][1] = I_dest;
|
|
M[LC][2] = I_src;
|
|
M[LC][3] = I_imm;
|
|
break;
|
|
case 3:
|
|
if (I_ret)
|
|
error("illegal use of \"ret\"");
|
|
M[LC][0] = (I_op << 1) | ((I_addr >> 8) & 1);
|
|
M[LC][1] = I_addr & 0xff;
|
|
M[LC][2] = I_src;
|
|
M[LC][3] = I_imm;
|
|
break;
|
|
}
|
|
|
|
return (1); /* no two-byte instructions yet */
|
|
}
|
|
|
|
#undef SL
|
|
#undef SR
|
|
#undef RL
|
|
#undef RR
|
|
#undef LX
|
|
#undef LA
|
|
#undef LO
|
|
#undef I
|
|
#undef A
|
|
|
|
void
|
|
assemble(FILE *ofile)
|
|
{
|
|
int n;
|
|
char **a;
|
|
sym_t *p;
|
|
|
|
while ((a = getl(&n))) {
|
|
|
|
while (a[0][strlen(*a)-1] == ':') {
|
|
a[0][strlen(*a)-1] = '\0';
|
|
p = lookup(*a);
|
|
if (p)
|
|
p->value = LC;
|
|
else
|
|
define(*a, LC);
|
|
a += 1;
|
|
n -= 1;
|
|
}
|
|
|
|
if (!n) /* line was all labels */
|
|
continue;
|
|
|
|
if (n == 3 && !strcmp("VERSION", *a))
|
|
fprintf(ofile, "#define %s \"%s\"\n", a[1], a[2]);
|
|
else {
|
|
if (n == 3 && !strcmp("=", a[1]))
|
|
define(*a, strtol(a[2], NULL, 0));
|
|
else
|
|
LC += crack(a, n);
|
|
}
|
|
}
|
|
|
|
backpatch();
|
|
output(ofile);
|
|
|
|
if (debug)
|
|
output(stderr);
|
|
}
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
int c;
|
|
int pid;
|
|
int ifile;
|
|
FILE *ofile;
|
|
int fd[2];
|
|
|
|
ofile = NULL;
|
|
while ((c = getopt(argc, argv, "dho:vD:")) != EOF) {
|
|
switch (c) {
|
|
case 'd':
|
|
debug = !0;
|
|
break;
|
|
case 'D':
|
|
{
|
|
char *p;
|
|
if ((p = strchr(optarg, '=')) != NULL) {
|
|
*p = '\0';
|
|
define(optarg, strtol(p + 1, NULL, 0));
|
|
}
|
|
else
|
|
define(optarg, 1);
|
|
break;
|
|
}
|
|
case 'o':
|
|
|
|
if ((ofile = fopen(optarg, "w")) == NULL) {
|
|
perror(optarg);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
break;
|
|
case 'h':
|
|
printf("usage: %s [-d] [-Dname] [-ooutput] input\n",
|
|
*argv);
|
|
exit(EXIT_SUCCESS);
|
|
break;
|
|
case 'v':
|
|
printf("%s\n", id);
|
|
exit(EXIT_SUCCESS);
|
|
break;
|
|
default:
|
|
exit(EXIT_FAILURE);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (argc - optind != 1) {
|
|
fprintf(stderr, "%s: must have one input file\n", *argv);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
filename = argv[optind];
|
|
|
|
|
|
if ((ifile = open(filename, O_RDONLY)) < 0) {
|
|
perror(filename);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
if (!ofile) {
|
|
if ((ofile = fopen(ADOTOUT, "w")) == NULL) {
|
|
perror(ADOTOUT);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
}
|
|
|
|
if (pipe(fd) < 0) {
|
|
perror("pipe failed");
|
|
exit(1);
|
|
}
|
|
|
|
if ((pid = fork()) < 0 ) {
|
|
perror("fork failed");
|
|
exit(1);
|
|
}
|
|
else if (pid > 0) { /* Parent */
|
|
close(fd[1]); /* Close write end */
|
|
if (fd[0] != STDIN_FILENO) {
|
|
if (dup2(fd[0], STDIN_FILENO) != STDIN_FILENO) {
|
|
perror("dup2 error on stdin");
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
close(fd[0]);
|
|
}
|
|
assemble(ofile);
|
|
exit(EXIT_SUCCESS);
|
|
}
|
|
else { /* Child */
|
|
close(fd[0]); /* Close Read end */
|
|
if (fd[1] != STDOUT_FILENO) {
|
|
if (dup2(fd[1], STDOUT_FILENO) != STDOUT_FILENO) {
|
|
perror("dup2 error on stdout");
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
close(fd[1]);
|
|
}
|
|
if (ifile != STDIN_FILENO) {
|
|
if (dup2(ifile, STDIN_FILENO) != STDIN_FILENO) {
|
|
perror("dup2 error on stdin");
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
close(ifile);
|
|
}
|
|
execl("/usr/bin/cpp", "/usr/bin/cpp", "-P", "-", "-", NULL);
|
|
}
|
|
return(EXIT_SUCCESS);
|
|
}
|