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FFI: Improve ld script detection in ffi.load().

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This commit is contained in:
Mike Pall 2011-11-25 11:19:59 +01:00
parent 923738459d
commit c2dcf39ee3
1 changed files with 23 additions and 9 deletions
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32
src/lj_clib.c
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@ -60,25 +60,39 @@ static const char *clib_extname(lua_State *L, const char *name)
return name; return name;
} }
/* Check for a recognized ld script line. */
static const char *clib_check_lds(lua_State *L, const char *buf)
{
char *p, *e;
if ((!strncmp(buf, "GROUP", 5) || !strncmp(buf, "INPUT", 5)) &&
(p = strchr(buf, '('))) {
while (*++p == ' ') ;
for (e = p; *e && *e != ' ' && *e != ')'; e++) ;
return strdata(lj_str_new(L, p, e-p));
}
return NULL;
}
/* Quick and dirty solution to resolve shared library name from ld script. */ /* Quick and dirty solution to resolve shared library name from ld script. */
static const char *clib_resolve_lds(lua_State *L, const char *name) static const char *clib_resolve_lds(lua_State *L, const char *name)
{ {
FILE *fp = fopen(name, "r"); FILE *fp = fopen(name, "r");
const char *p = NULL;
if (fp) { if (fp) {
char *p, *e, buf[256]; char buf[256];
if (fgets(buf, sizeof(buf), fp) && !strncmp(buf, "/* GNU ld script", 16)) { if (fgets(buf, sizeof(buf), fp)) {
while (fgets(buf, sizeof(buf), fp)) { if (!strncmp(buf, "/* GNU ld script", 16)) { /* ld script magic? */
if (!strncmp(buf, "GROUP", 5) && (p = strchr(buf, '('))) { while (fgets(buf, sizeof(buf), fp)) { /* Check all lines. */
while (*++p == ' ') ; p = clib_check_lds(L, buf);
for (e = p; *e && *e != ' ' && *e != ')'; e++) ; if (p) break;
fclose(fp);
return strdata(lj_str_new(L, p, e-p));
} }
} else { /* Otherwise check only the first line. */
p = clib_check_lds(L, buf);
} }
} }
fclose(fp); fclose(fp);
} }
return NULL; return p;
} }
static void *clib_loadlib(lua_State *L, const char *name, int global) static void *clib_loadlib(lua_State *L, const char *name, int global)