Hojun-Cho
1657bdeda3
C bootstrap (phases 0-9):
cmd/wwc, cmd/6c, cmd/6a, cmd/6l, cmd/ww, rt, lib/*.
ww-side self-host (phase 10):
selfhost/cmd/wwc — ww-cgen frontend; bootstrap fixed point.
selfhost/cmd/6a — assembler; byte-identical to C 6a (test 991).
selfhost/cmd/6l — linker w/ archive (.a) support; byte-identical
to C 6l (test 992).
selfhost/cmd/ww — driver (build/run/version); byte-identical to
C ww (test 993).
make test: 15/15. make bootstrap: ww2.s == ww3.s, ww2.o == ww3.o,
ww2 == ww3 byte-identical, with the full ww-tooled chain.
94 lines
1.9 KiB
C
94 lines
1.9 KiB
C
/*
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* 6c — amd64 compiler driver. Reads a .ww source file, runs the
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* libwwc frontend (lex → parse → check), then walks the typed AST
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* via cgen.c and writes Plan 9-flavoured amd64 asm to stdout (or
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* the file given by -o).
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*/
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#include "gc.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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static int
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slurp(const char *path, char **outbuf, u64 *outlen)
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{
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FILE *f = fopen(path, "rb");
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if (f == NULL) return -1;
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fseek(f, 0, SEEK_END);
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long n = ftell(f);
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fseek(f, 0, SEEK_SET);
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if (n < 0) { fclose(f); return -1; }
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char *b = malloc((size_t)n + 1);
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if (b == NULL) { fclose(f); return -1; }
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if (fread(b, 1, (size_t)n, f) != (size_t)n) { free(b); fclose(f); return -1; }
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b[n] = '\0';
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fclose(f);
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*outbuf = b;
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*outlen = (u64)n;
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return 0;
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}
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int
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main(int argc, char **argv)
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{
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const char *src = NULL;
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const char *out = NULL;
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for (int i = 1; i < argc; i++) {
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const char *a = argv[i];
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if (strcmp(a, "-o") == 0 && i + 1 < argc) {
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out = argv[++i];
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} else if (a[0] == '-') {
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fprintf(stderr, "6c: unknown flag %s\n", a);
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return 2;
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} else if (src == NULL) {
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src = a;
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} else {
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fprintf(stderr, "6c: only one input supported\n");
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return 2;
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}
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}
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if (src == NULL) {
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fputs("usage: 6c [-o out.s] file.ww\n", stderr);
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return 2;
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}
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char *buf;
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u64 len;
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if (slurp(src, &buf, &len) < 0) {
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fprintf(stderr, "6c: %s: cannot read\n", src);
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return 1;
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}
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Arena *a = newarena();
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Lex l;
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Parser p;
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Checker c;
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Cg cg;
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lexinit(&l, a, src, buf, len);
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parserinit(&p, a, &l);
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Node *file = parsefile(&p);
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if (l.errs || p.errs) return 1;
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check_init(&c, a);
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check_file(&c, file);
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if (c.errs) return 1;
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FILE *of = stdout;
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if (out) {
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of = fopen(out, "wb");
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if (of == NULL) {
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fprintf(stderr, "6c: cannot open %s\n", out);
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return 1;
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}
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}
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cg_init(&cg, a);
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cg_file(&cg, of, file);
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if (of != stdout) fclose(of);
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freearena(a);
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free(buf);
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return 0;
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}
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