ref: 18413bd79d3df58176c3897d2877148913b448e7
dir: /6/gen.c/
#include <stdlib.h> #include <stdio.h> #include <stdarg.h> #include <inttypes.h> #include <ctype.h> #include <string.h> #include <assert.h> #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <unistd.h> #include "parse.h" #include "mi.h" #include "asm.h" #include "../config.h" static int islocal(Node *dcl) { if (dcl->decl.vis != Visintern) return 0; if (dcl->decl.isimport || dcl->decl.isextern) return 0; return 1; } static int nextlbl; char *genlocallblstr(char *buf, size_t sz) { if (asmsyntax == Plan9) snprintf(buf, 128, ".L%d<>", nextlbl++); else snprintf(buf, 128, ".L%d", nextlbl++); return buf; } char *genlblstr(char *buf, size_t sz) { snprintf(buf, 128, ".L%d", nextlbl++); return buf; } /* * For x86, the assembly names are generated as follows: * local symbols: .name * un-namespaced symbols: <symprefix>name * namespaced symbols: <symprefix>namespace$name * local symbols on plan9 have the file-unique suffix '<>' appended */ char *asmname(Node *dcl) { char buf[1024]; char *vis, *pf, *ns, *name, *sep; Node *n; n = dcl->decl.name; pf = Symprefix; ns = n->name.ns; name = n->name.name; vis = ""; sep = ""; if (asmsyntax == Plan9) if (islocal(dcl)) vis = "<>"; if (!ns || !ns[0]) ns = ""; else sep = "$"; if (name[0] == '.') pf = ""; snprintf(buf, sizeof buf, "%s%s%s%s%s", pf, ns, sep, name, vis); return strdup(buf); } void gen(Node *file, char *out) { switch (asmsyntax) { case Plan9: genp9(file, out); break; case Gnugas: gengas(file, out); break; default: die("unknown target"); break; } }