static int parse_bool_option(struct isl_arg *decl, char **arg,
struct isl_prefixes *prefixes, void *opt)
{
const char *name;
unsigned *p = (unsigned *)(((char *)opt) + decl->offset);
int next_prefix;
if (skip_name(decl, arg[0], prefixes, 0, NULL)) {
if ((decl->flags & ISL_ARG_BOOL_ARG) && arg[1]) {
char *endptr;
int val = strtol(arg[1], &endptr, 0);
if (*endptr == '\0' && (val == 0 || val == 1)) {
if (decl->offset != (size_t) -1)
*p = val;
if (decl->u.b.set)
decl->u.b.set(opt, val);
return 2;
}
}
if (decl->offset != (size_t) -1)
*p = 1;
if (decl->u.b.set)
decl->u.b.set(opt, 1);
return 1;
}
if (!decl->long_name)
return 0;
name = skip_dash_dash(decl, arg[0]);
if (!name)
return 0;
next_prefix = 0;
name = skip_prefixes(name, prefixes, &next_prefix);
if (strncmp(name, "no-", 3))
return 0;
name += 3;
name = skip_prefixes(name, prefixes, &next_prefix);
if (match_long_name(decl, name, name + strlen(name))) {
if (decl->offset != (size_t) -1)
*p = 0;
if (decl->u.b.set)
decl->u.b.set(opt, 0);
return 1;
}
return 0;
}
/*
* Returns non-zero if opcode modifies the interrupt flag.
*/
static int __kprobes is_IF_modifier(kprobe_opcode_t *insn)
{
/* Skip prefixes */
insn = skip_prefixes(insn);
switch (*insn) {
case 0xfa: /* cli */
case 0xfb: /* sti */
case 0xcf: /* iret/iretd */
case 0x9d: /* popf/popfd */
return 1;
}
return 0;
}
static const char *skip_name(struct isl_arg *decl, const char *arg,
struct isl_prefixes *prefixes, int need_argument, int *has_argument)
{
const char *equal;
const char *name;
const char *end;
if (arg[0] == '-' && arg[1] && arg[1] == decl->short_name) {
if (need_argument && !arg[2])
return NULL;
if (has_argument)
*has_argument = arg[2] != '\0';
return arg + 2;
}
if (!decl->long_name)
return NULL;
name = skip_dash_dash(decl, arg);
if (!name)
return NULL;
equal = strchr(name, '=');
if (need_argument && !equal)
return NULL;
if (has_argument)
*has_argument = !!equal;
end = equal ? equal : name + strlen(name);
name = skip_prefixes(name, prefixes, NULL);
if (!match_long_name(decl, name, end))
return NULL;
return equal ? equal + 1 : end;
}
