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path: root/tools/lib/bpf/btf_dump.c
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Diffstat (limited to 'tools/lib/bpf/btf_dump.c')
-rw-r--r--tools/lib/bpf/btf_dump.c185
1 files changed, 137 insertions, 48 deletions
diff --git a/tools/lib/bpf/btf_dump.c b/tools/lib/bpf/btf_dump.c
index 17db62b5002e..4221f73a74d0 100644
--- a/tools/lib/bpf/btf_dump.c
+++ b/tools/lib/bpf/btf_dump.c
@@ -77,9 +77,8 @@ struct btf_dump_data {
struct btf_dump {
const struct btf *btf;
- const struct btf_ext *btf_ext;
btf_dump_printf_fn_t printf_fn;
- struct btf_dump_opts opts;
+ void *cb_ctx;
int ptr_sz;
bool strip_mods;
bool skip_anon_defs;
@@ -138,7 +137,7 @@ static void btf_dump_printf(const struct btf_dump *d, const char *fmt, ...)
va_list args;
va_start(args, fmt);
- d->printf_fn(d->opts.ctx, fmt, args);
+ d->printf_fn(d->cb_ctx, fmt, args);
va_end(args);
}
@@ -146,21 +145,26 @@ static int btf_dump_mark_referenced(struct btf_dump *d);
static int btf_dump_resize(struct btf_dump *d);
struct btf_dump *btf_dump__new(const struct btf *btf,
- const struct btf_ext *btf_ext,
- const struct btf_dump_opts *opts,
- btf_dump_printf_fn_t printf_fn)
+ btf_dump_printf_fn_t printf_fn,
+ void *ctx,
+ const struct btf_dump_opts *opts)
{
struct btf_dump *d;
int err;
+ if (!OPTS_VALID(opts, btf_dump_opts))
+ return libbpf_err_ptr(-EINVAL);
+
+ if (!printf_fn)
+ return libbpf_err_ptr(-EINVAL);
+
d = calloc(1, sizeof(struct btf_dump));
if (!d)
return libbpf_err_ptr(-ENOMEM);
d->btf = btf;
- d->btf_ext = btf_ext;
d->printf_fn = printf_fn;
- d->opts.ctx = opts ? opts->ctx : NULL;
+ d->cb_ctx = ctx;
d->ptr_sz = btf__pointer_size(btf) ? : sizeof(void *);
d->type_names = hashmap__new(str_hash_fn, str_equal_fn, NULL);
@@ -305,6 +309,7 @@ static int btf_dump_mark_referenced(struct btf_dump *d)
switch (btf_kind(t)) {
case BTF_KIND_INT:
case BTF_KIND_ENUM:
+ case BTF_KIND_ENUM64:
case BTF_KIND_FWD:
case BTF_KIND_FLOAT:
break;
@@ -317,6 +322,7 @@ static int btf_dump_mark_referenced(struct btf_dump *d)
case BTF_KIND_FUNC:
case BTF_KIND_VAR:
case BTF_KIND_DECL_TAG:
+ case BTF_KIND_TYPE_TAG:
d->type_states[t->type].referenced = 1;
break;
@@ -524,6 +530,7 @@ static int btf_dump_order_type(struct btf_dump *d, __u32 id, bool through_ptr)
return 1;
}
case BTF_KIND_ENUM:
+ case BTF_KIND_ENUM64:
case BTF_KIND_FWD:
/*
* non-anonymous or non-referenced enums are top-level
@@ -560,6 +567,7 @@ static int btf_dump_order_type(struct btf_dump *d, __u32 id, bool through_ptr)
case BTF_KIND_VOLATILE:
case BTF_KIND_CONST:
case BTF_KIND_RESTRICT:
+ case BTF_KIND_TYPE_TAG:
return btf_dump_order_type(d, t->type, through_ptr);
case BTF_KIND_FUNC_PROTO: {
@@ -724,6 +732,7 @@ static void btf_dump_emit_type(struct btf_dump *d, __u32 id, __u32 cont_id)
tstate->emit_state = EMITTED;
break;
case BTF_KIND_ENUM:
+ case BTF_KIND_ENUM64:
if (top_level_def) {
btf_dump_emit_enum_def(d, id, t, 0);
btf_dump_printf(d, ";\n\n");
@@ -734,6 +743,7 @@ static void btf_dump_emit_type(struct btf_dump *d, __u32 id, __u32 cont_id)
case BTF_KIND_VOLATILE:
case BTF_KIND_CONST:
case BTF_KIND_RESTRICT:
+ case BTF_KIND_TYPE_TAG:
btf_dump_emit_type(d, t->type, cont_id);
break;
case BTF_KIND_ARRAY:
@@ -973,38 +983,81 @@ static void btf_dump_emit_enum_fwd(struct btf_dump *d, __u32 id,
btf_dump_printf(d, "enum %s", btf_dump_type_name(d, id));
}
-static void btf_dump_emit_enum_def(struct btf_dump *d, __u32 id,
- const struct btf_type *t,
- int lvl)
+static void btf_dump_emit_enum32_val(struct btf_dump *d,
+ const struct btf_type *t,
+ int lvl, __u16 vlen)
{
const struct btf_enum *v = btf_enum(t);
- __u16 vlen = btf_vlen(t);
+ bool is_signed = btf_kflag(t);
+ const char *fmt_str;
const char *name;
size_t dup_cnt;
int i;
+ for (i = 0; i < vlen; i++, v++) {
+ name = btf_name_of(d, v->name_off);
+ /* enumerators share namespace with typedef idents */
+ dup_cnt = btf_dump_name_dups(d, d->ident_names, name);
+ if (dup_cnt > 1) {
+ fmt_str = is_signed ? "\n%s%s___%zd = %d," : "\n%s%s___%zd = %u,";
+ btf_dump_printf(d, fmt_str, pfx(lvl + 1), name, dup_cnt, v->val);
+ } else {
+ fmt_str = is_signed ? "\n%s%s = %d," : "\n%s%s = %u,";
+ btf_dump_printf(d, fmt_str, pfx(lvl + 1), name, v->val);
+ }
+ }
+}
+
+static void btf_dump_emit_enum64_val(struct btf_dump *d,
+ const struct btf_type *t,
+ int lvl, __u16 vlen)
+{
+ const struct btf_enum64 *v = btf_enum64(t);
+ bool is_signed = btf_kflag(t);
+ const char *fmt_str;
+ const char *name;
+ size_t dup_cnt;
+ __u64 val;
+ int i;
+
+ for (i = 0; i < vlen; i++, v++) {
+ name = btf_name_of(d, v->name_off);
+ dup_cnt = btf_dump_name_dups(d, d->ident_names, name);
+ val = btf_enum64_value(v);
+ if (dup_cnt > 1) {
+ fmt_str = is_signed ? "\n%s%s___%zd = %lldLL,"
+ : "\n%s%s___%zd = %lluULL,";
+ btf_dump_printf(d, fmt_str,
+ pfx(lvl + 1), name, dup_cnt,
+ (unsigned long long)val);
+ } else {
+ fmt_str = is_signed ? "\n%s%s = %lldLL,"
+ : "\n%s%s = %lluULL,";
+ btf_dump_printf(d, fmt_str,
+ pfx(lvl + 1), name,
+ (unsigned long long)val);
+ }
+ }
+}
+static void btf_dump_emit_enum_def(struct btf_dump *d, __u32 id,
+ const struct btf_type *t,
+ int lvl)
+{
+ __u16 vlen = btf_vlen(t);
+
btf_dump_printf(d, "enum%s%s",
t->name_off ? " " : "",
btf_dump_type_name(d, id));
- if (vlen) {
- btf_dump_printf(d, " {");
- for (i = 0; i < vlen; i++, v++) {
- name = btf_name_of(d, v->name_off);
- /* enumerators share namespace with typedef idents */
- dup_cnt = btf_dump_name_dups(d, d->ident_names, name);
- if (dup_cnt > 1) {
- btf_dump_printf(d, "\n%s%s___%zu = %u,",
- pfx(lvl + 1), name, dup_cnt,
- (__u32)v->val);
- } else {
- btf_dump_printf(d, "\n%s%s = %u,",
- pfx(lvl + 1), name,
- (__u32)v->val);
- }
- }
- btf_dump_printf(d, "\n%s}", pfx(lvl));
- }
+ if (!vlen)
+ return;
+
+ btf_dump_printf(d, " {");
+ if (btf_is_enum(t))
+ btf_dump_emit_enum32_val(d, t, lvl, vlen);
+ else
+ btf_dump_emit_enum64_val(d, t, lvl, vlen);
+ btf_dump_printf(d, "\n%s}", pfx(lvl));
}
static void btf_dump_emit_fwd_def(struct btf_dump *d, __u32 id,
@@ -1154,6 +1207,7 @@ skip_mod:
case BTF_KIND_CONST:
case BTF_KIND_RESTRICT:
case BTF_KIND_FUNC_PROTO:
+ case BTF_KIND_TYPE_TAG:
id = t->type;
break;
case BTF_KIND_ARRAY:
@@ -1161,6 +1215,7 @@ skip_mod:
break;
case BTF_KIND_INT:
case BTF_KIND_ENUM:
+ case BTF_KIND_ENUM64:
case BTF_KIND_FWD:
case BTF_KIND_STRUCT:
case BTF_KIND_UNION:
@@ -1295,6 +1350,7 @@ static void btf_dump_emit_type_chain(struct btf_dump *d,
btf_dump_emit_struct_fwd(d, id, t);
break;
case BTF_KIND_ENUM:
+ case BTF_KIND_ENUM64:
btf_dump_emit_mods(d, decls);
/* inline anonymous enum */
if (t->name_off == 0 && !d->skip_anon_defs)
@@ -1322,6 +1378,11 @@ static void btf_dump_emit_type_chain(struct btf_dump *d,
case BTF_KIND_RESTRICT:
btf_dump_printf(d, " restrict");
break;
+ case BTF_KIND_TYPE_TAG:
+ btf_dump_emit_mods(d, decls);
+ name = btf_name_of(d, t->name_off);
+ btf_dump_printf(d, " __attribute__((btf_type_tag(\"%s\")))", name);
+ break;
case BTF_KIND_ARRAY: {
const struct btf_array *a = btf_array(t);
const struct btf_type *next_t;
@@ -1483,6 +1544,11 @@ static const char *btf_dump_resolve_name(struct btf_dump *d, __u32 id,
if (s->name_resolved)
return *cached_name ? *cached_name : orig_name;
+ if (btf_is_fwd(t) || (btf_is_enum(t) && btf_vlen(t) == 0)) {
+ s->name_resolved = 1;
+ return orig_name;
+ }
+
dup_cnt = btf_dump_name_dups(d, name_map, orig_name);
if (dup_cnt > 1) {
const size_t max_len = 256;
@@ -1839,14 +1905,16 @@ static int btf_dump_array_data(struct btf_dump *d,
{
const struct btf_array *array = btf_array(t);
const struct btf_type *elem_type;
- __u32 i, elem_size = 0, elem_type_id;
+ __u32 i, elem_type_id;
+ __s64 elem_size;
bool is_array_member;
elem_type_id = array->type;
elem_type = skip_mods_and_typedefs(d->btf, elem_type_id, NULL);
elem_size = btf__resolve_size(d->btf, elem_type_id);
if (elem_size <= 0) {
- pr_warn("unexpected elem size %d for array type [%u]\n", elem_size, id);
+ pr_warn("unexpected elem size %zd for array type [%u]\n",
+ (ssize_t)elem_size, id);
return -EINVAL;
}
@@ -1959,7 +2027,8 @@ static int btf_dump_get_enum_value(struct btf_dump *d,
__u32 id,
__s64 *value)
{
- /* handle unaligned enum value */
+ bool is_signed = btf_kflag(t);
+
if (!ptr_is_aligned(d->btf, id, data)) {
__u64 val;
int err;
@@ -1976,13 +2045,13 @@ static int btf_dump_get_enum_value(struct btf_dump *d,
*value = *(__s64 *)data;
return 0;
case 4:
- *value = *(__s32 *)data;
+ *value = is_signed ? (__s64)*(__s32 *)data : *(__u32 *)data;
return 0;
case 2:
- *value = *(__s16 *)data;
+ *value = is_signed ? *(__s16 *)data : *(__u16 *)data;
return 0;
case 1:
- *value = *(__s8 *)data;
+ *value = is_signed ? *(__s8 *)data : *(__u8 *)data;
return 0;
default:
pr_warn("unexpected size %d for enum, id:[%u]\n", t->size, id);
@@ -1995,7 +2064,7 @@ static int btf_dump_enum_data(struct btf_dump *d,
__u32 id,
const void *data)
{
- const struct btf_enum *e;
+ bool is_signed;
__s64 value;
int i, err;
@@ -2003,14 +2072,31 @@ static int btf_dump_enum_data(struct btf_dump *d,
if (err)
return err;
- for (i = 0, e = btf_enum(t); i < btf_vlen(t); i++, e++) {
- if (value != e->val)
- continue;
- btf_dump_type_values(d, "%s", btf_name_of(d, e->name_off));
- return 0;
- }
+ is_signed = btf_kflag(t);
+ if (btf_is_enum(t)) {
+ const struct btf_enum *e;
+
+ for (i = 0, e = btf_enum(t); i < btf_vlen(t); i++, e++) {
+ if (value != e->val)
+ continue;
+ btf_dump_type_values(d, "%s", btf_name_of(d, e->name_off));
+ return 0;
+ }
- btf_dump_type_values(d, "%d", value);
+ btf_dump_type_values(d, is_signed ? "%d" : "%u", value);
+ } else {
+ const struct btf_enum64 *e;
+
+ for (i = 0, e = btf_enum64(t); i < btf_vlen(t); i++, e++) {
+ if (value != btf_enum64_value(e))
+ continue;
+ btf_dump_type_values(d, "%s", btf_name_of(d, e->name_off));
+ return 0;
+ }
+
+ btf_dump_type_values(d, is_signed ? "%lldLL" : "%lluULL",
+ (unsigned long long)value);
+ }
return 0;
}
@@ -2070,6 +2156,7 @@ static int btf_dump_type_data_check_overflow(struct btf_dump *d,
case BTF_KIND_FLOAT:
case BTF_KIND_PTR:
case BTF_KIND_ENUM:
+ case BTF_KIND_ENUM64:
if (data + bits_offset / 8 + size > d->typed_dump->data_end)
return -E2BIG;
break;
@@ -2174,6 +2261,7 @@ static int btf_dump_type_data_check_zero(struct btf_dump *d,
return -ENODATA;
}
case BTF_KIND_ENUM:
+ case BTF_KIND_ENUM64:
err = btf_dump_get_enum_value(d, t, data, id, &value);
if (err)
return err;
@@ -2194,7 +2282,7 @@ static int btf_dump_dump_type_data(struct btf_dump *d,
__u8 bits_offset,
__u8 bit_sz)
{
- int size, err;
+ int size, err = 0;
size = btf_dump_type_data_check_overflow(d, t, id, data, bits_offset);
if (size < 0)
@@ -2246,6 +2334,7 @@ static int btf_dump_dump_type_data(struct btf_dump *d,
err = btf_dump_struct_data(d, t, id, data);
break;
case BTF_KIND_ENUM:
+ case BTF_KIND_ENUM64:
/* handle bitfield and int enum values */
if (bit_sz) {
__u64 print_num;
@@ -2296,11 +2385,11 @@ int btf_dump__dump_type_data(struct btf_dump *d, __u32 id,
d->typed_dump->indent_lvl = OPTS_GET(opts, indent_level, 0);
/* default indent string is a tab */
- if (!opts->indent_str)
+ if (!OPTS_GET(opts, indent_str, NULL))
d->typed_dump->indent_str[0] = '\t';
else
- strncat(d->typed_dump->indent_str, opts->indent_str,
- sizeof(d->typed_dump->indent_str) - 1);
+ libbpf_strlcpy(d->typed_dump->indent_str, opts->indent_str,
+ sizeof(d->typed_dump->indent_str));
d->typed_dump->compact = OPTS_GET(opts, compact, false);
d->typed_dump->skip_names = OPTS_GET(opts, skip_names, false);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.