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784 lines
19 KiB
784 lines
19 KiB
// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) |
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/* Copyright (c) 2018 Facebook */ |
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|
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#include <ctype.h> |
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#include <stdio.h> /* for (FILE *) used by json_writer */ |
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#include <string.h> |
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#include <unistd.h> |
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#include <asm/byteorder.h> |
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#include <linux/bitops.h> |
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#include <linux/btf.h> |
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#include <linux/err.h> |
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#include <bpf/btf.h> |
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#include <bpf/bpf.h> |
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|
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#include "json_writer.h" |
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#include "main.h" |
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|
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#define BITS_PER_BYTE_MASK (BITS_PER_BYTE - 1) |
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#define BITS_PER_BYTE_MASKED(bits) ((bits) & BITS_PER_BYTE_MASK) |
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#define BITS_ROUNDDOWN_BYTES(bits) ((bits) >> 3) |
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#define BITS_ROUNDUP_BYTES(bits) \ |
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(BITS_ROUNDDOWN_BYTES(bits) + !!BITS_PER_BYTE_MASKED(bits)) |
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|
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static int btf_dumper_do_type(const struct btf_dumper *d, __u32 type_id, |
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__u8 bit_offset, const void *data); |
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|
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static int btf_dump_func(const struct btf *btf, char *func_sig, |
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const struct btf_type *func_proto, |
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const struct btf_type *func, int pos, int size); |
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|
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static int dump_prog_id_as_func_ptr(const struct btf_dumper *d, |
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const struct btf_type *func_proto, |
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__u32 prog_id) |
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{ |
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struct bpf_prog_info_linear *prog_info = NULL; |
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const struct btf_type *func_type; |
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const char *prog_name = NULL; |
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struct bpf_func_info *finfo; |
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struct btf *prog_btf = NULL; |
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struct bpf_prog_info *info; |
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int prog_fd, func_sig_len; |
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char prog_str[1024]; |
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|
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/* Get the ptr's func_proto */ |
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func_sig_len = btf_dump_func(d->btf, prog_str, func_proto, NULL, 0, |
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sizeof(prog_str)); |
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if (func_sig_len == -1) |
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return -1; |
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|
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if (!prog_id) |
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goto print; |
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|
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/* Get the bpf_prog's name. Obtain from func_info. */ |
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prog_fd = bpf_prog_get_fd_by_id(prog_id); |
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if (prog_fd == -1) |
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goto print; |
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|
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prog_info = bpf_program__get_prog_info_linear(prog_fd, |
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1UL << BPF_PROG_INFO_FUNC_INFO); |
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close(prog_fd); |
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if (IS_ERR(prog_info)) { |
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prog_info = NULL; |
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goto print; |
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} |
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info = &prog_info->info; |
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|
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if (!info->btf_id || !info->nr_func_info || |
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btf__get_from_id(info->btf_id, &prog_btf)) |
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goto print; |
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finfo = u64_to_ptr(info->func_info); |
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func_type = btf__type_by_id(prog_btf, finfo->type_id); |
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if (!func_type || !btf_is_func(func_type)) |
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goto print; |
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prog_name = btf__name_by_offset(prog_btf, func_type->name_off); |
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|
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print: |
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if (!prog_id) |
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snprintf(&prog_str[func_sig_len], |
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sizeof(prog_str) - func_sig_len, " 0"); |
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else if (prog_name) |
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snprintf(&prog_str[func_sig_len], |
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sizeof(prog_str) - func_sig_len, |
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" %s/prog_id:%u", prog_name, prog_id); |
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else |
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snprintf(&prog_str[func_sig_len], |
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sizeof(prog_str) - func_sig_len, |
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" <unknown_prog_name>/prog_id:%u", prog_id); |
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|
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prog_str[sizeof(prog_str) - 1] = '\0'; |
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jsonw_string(d->jw, prog_str); |
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btf__free(prog_btf); |
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free(prog_info); |
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return 0; |
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} |
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|
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static void btf_dumper_ptr(const struct btf_dumper *d, |
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const struct btf_type *t, |
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const void *data) |
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{ |
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unsigned long value = *(unsigned long *)data; |
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const struct btf_type *ptr_type; |
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__s32 ptr_type_id; |
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|
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if (!d->prog_id_as_func_ptr || value > UINT32_MAX) |
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goto print_ptr_value; |
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ptr_type_id = btf__resolve_type(d->btf, t->type); |
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if (ptr_type_id < 0) |
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goto print_ptr_value; |
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ptr_type = btf__type_by_id(d->btf, ptr_type_id); |
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if (!ptr_type || !btf_is_func_proto(ptr_type)) |
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goto print_ptr_value; |
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|
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if (!dump_prog_id_as_func_ptr(d, ptr_type, value)) |
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return; |
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print_ptr_value: |
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if (d->is_plain_text) |
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jsonw_printf(d->jw, "%p", (void *)value); |
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else |
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jsonw_printf(d->jw, "%lu", value); |
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} |
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|
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static int btf_dumper_modifier(const struct btf_dumper *d, __u32 type_id, |
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__u8 bit_offset, const void *data) |
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{ |
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int actual_type_id; |
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|
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actual_type_id = btf__resolve_type(d->btf, type_id); |
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if (actual_type_id < 0) |
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return actual_type_id; |
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|
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return btf_dumper_do_type(d, actual_type_id, bit_offset, data); |
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} |
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|
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static int btf_dumper_enum(const struct btf_dumper *d, |
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const struct btf_type *t, |
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const void *data) |
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{ |
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const struct btf_enum *enums = btf_enum(t); |
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__s64 value; |
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__u16 i; |
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|
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switch (t->size) { |
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case 8: |
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value = *(__s64 *)data; |
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break; |
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case 4: |
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value = *(__s32 *)data; |
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break; |
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case 2: |
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value = *(__s16 *)data; |
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break; |
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case 1: |
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value = *(__s8 *)data; |
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break; |
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default: |
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return -EINVAL; |
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} |
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for (i = 0; i < btf_vlen(t); i++) { |
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if (value == enums[i].val) { |
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jsonw_string(d->jw, |
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btf__name_by_offset(d->btf, |
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enums[i].name_off)); |
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return 0; |
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} |
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} |
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jsonw_int(d->jw, value); |
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return 0; |
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} |
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static bool is_str_array(const struct btf *btf, const struct btf_array *arr, |
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const char *s) |
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{ |
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const struct btf_type *elem_type; |
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const char *end_s; |
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|
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if (!arr->nelems) |
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return false; |
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|
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elem_type = btf__type_by_id(btf, arr->type); |
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/* Not skipping typedef. typedef to char does not count as |
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* a string now. |
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*/ |
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while (elem_type && btf_is_mod(elem_type)) |
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elem_type = btf__type_by_id(btf, elem_type->type); |
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|
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if (!elem_type || !btf_is_int(elem_type) || elem_type->size != 1) |
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return false; |
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if (btf_int_encoding(elem_type) != BTF_INT_CHAR && |
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strcmp("char", btf__name_by_offset(btf, elem_type->name_off))) |
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return false; |
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end_s = s + arr->nelems; |
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while (s < end_s) { |
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if (!*s) |
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return true; |
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if (*s <= 0x1f || *s >= 0x7f) |
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return false; |
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s++; |
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} |
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/* '\0' is not found */ |
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return false; |
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} |
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static int btf_dumper_array(const struct btf_dumper *d, __u32 type_id, |
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const void *data) |
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{ |
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const struct btf_type *t = btf__type_by_id(d->btf, type_id); |
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struct btf_array *arr = (struct btf_array *)(t + 1); |
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long long elem_size; |
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int ret = 0; |
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__u32 i; |
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|
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if (is_str_array(d->btf, arr, data)) { |
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jsonw_string(d->jw, data); |
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return 0; |
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} |
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elem_size = btf__resolve_size(d->btf, arr->type); |
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if (elem_size < 0) |
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return elem_size; |
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|
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jsonw_start_array(d->jw); |
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for (i = 0; i < arr->nelems; i++) { |
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ret = btf_dumper_do_type(d, arr->type, 0, |
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data + i * elem_size); |
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if (ret) |
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break; |
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} |
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jsonw_end_array(d->jw); |
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return ret; |
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} |
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static void btf_int128_print(json_writer_t *jw, const void *data, |
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bool is_plain_text) |
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{ |
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/* data points to a __int128 number. |
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* Suppose |
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* int128_num = *(__int128 *)data; |
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* The below formulas shows what upper_num and lower_num represents: |
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* upper_num = int128_num >> 64; |
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* lower_num = int128_num & 0xffffffffFFFFFFFFULL; |
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*/ |
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__u64 upper_num, lower_num; |
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#ifdef __BIG_ENDIAN_BITFIELD |
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upper_num = *(__u64 *)data; |
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lower_num = *(__u64 *)(data + 8); |
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#else |
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upper_num = *(__u64 *)(data + 8); |
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lower_num = *(__u64 *)data; |
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#endif |
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if (is_plain_text) { |
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if (upper_num == 0) |
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jsonw_printf(jw, "0x%llx", lower_num); |
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else |
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jsonw_printf(jw, "0x%llx%016llx", upper_num, lower_num); |
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} else { |
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if (upper_num == 0) |
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jsonw_printf(jw, "\"0x%llx\"", lower_num); |
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else |
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jsonw_printf(jw, "\"0x%llx%016llx\"", upper_num, lower_num); |
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} |
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} |
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static void btf_int128_shift(__u64 *print_num, __u16 left_shift_bits, |
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__u16 right_shift_bits) |
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{ |
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__u64 upper_num, lower_num; |
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|
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#ifdef __BIG_ENDIAN_BITFIELD |
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upper_num = print_num[0]; |
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lower_num = print_num[1]; |
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#else |
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upper_num = print_num[1]; |
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lower_num = print_num[0]; |
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#endif |
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/* shake out un-needed bits by shift/or operations */ |
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if (left_shift_bits >= 64) { |
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upper_num = lower_num << (left_shift_bits - 64); |
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lower_num = 0; |
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} else { |
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upper_num = (upper_num << left_shift_bits) | |
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(lower_num >> (64 - left_shift_bits)); |
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lower_num = lower_num << left_shift_bits; |
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} |
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if (right_shift_bits >= 64) { |
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lower_num = upper_num >> (right_shift_bits - 64); |
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upper_num = 0; |
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} else { |
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lower_num = (lower_num >> right_shift_bits) | |
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(upper_num << (64 - right_shift_bits)); |
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upper_num = upper_num >> right_shift_bits; |
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} |
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#ifdef __BIG_ENDIAN_BITFIELD |
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print_num[0] = upper_num; |
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print_num[1] = lower_num; |
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#else |
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print_num[0] = lower_num; |
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print_num[1] = upper_num; |
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#endif |
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} |
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static void btf_dumper_bitfield(__u32 nr_bits, __u8 bit_offset, |
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const void *data, json_writer_t *jw, |
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bool is_plain_text) |
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{ |
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int left_shift_bits, right_shift_bits; |
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__u64 print_num[2] = {}; |
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int bytes_to_copy; |
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int bits_to_copy; |
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|
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bits_to_copy = bit_offset + nr_bits; |
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bytes_to_copy = BITS_ROUNDUP_BYTES(bits_to_copy); |
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memcpy(print_num, data, bytes_to_copy); |
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#if defined(__BIG_ENDIAN_BITFIELD) |
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left_shift_bits = bit_offset; |
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#elif defined(__LITTLE_ENDIAN_BITFIELD) |
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left_shift_bits = 128 - bits_to_copy; |
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#else |
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#error neither big nor little endian |
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#endif |
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right_shift_bits = 128 - nr_bits; |
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|
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btf_int128_shift(print_num, left_shift_bits, right_shift_bits); |
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btf_int128_print(jw, print_num, is_plain_text); |
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} |
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|
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static void btf_dumper_int_bits(__u32 int_type, __u8 bit_offset, |
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const void *data, json_writer_t *jw, |
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bool is_plain_text) |
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{ |
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int nr_bits = BTF_INT_BITS(int_type); |
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int total_bits_offset; |
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|
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/* bits_offset is at most 7. |
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* BTF_INT_OFFSET() cannot exceed 128 bits. |
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*/ |
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total_bits_offset = bit_offset + BTF_INT_OFFSET(int_type); |
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data += BITS_ROUNDDOWN_BYTES(total_bits_offset); |
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bit_offset = BITS_PER_BYTE_MASKED(total_bits_offset); |
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btf_dumper_bitfield(nr_bits, bit_offset, data, jw, |
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is_plain_text); |
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} |
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|
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static int btf_dumper_int(const struct btf_type *t, __u8 bit_offset, |
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const void *data, json_writer_t *jw, |
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bool is_plain_text) |
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{ |
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__u32 *int_type; |
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__u32 nr_bits; |
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|
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int_type = (__u32 *)(t + 1); |
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nr_bits = BTF_INT_BITS(*int_type); |
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/* if this is bit field */ |
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if (bit_offset || BTF_INT_OFFSET(*int_type) || |
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BITS_PER_BYTE_MASKED(nr_bits)) { |
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btf_dumper_int_bits(*int_type, bit_offset, data, jw, |
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is_plain_text); |
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return 0; |
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} |
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|
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if (nr_bits == 128) { |
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btf_int128_print(jw, data, is_plain_text); |
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return 0; |
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} |
|
|
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switch (BTF_INT_ENCODING(*int_type)) { |
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case 0: |
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if (BTF_INT_BITS(*int_type) == 64) |
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jsonw_printf(jw, "%llu", *(__u64 *)data); |
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else if (BTF_INT_BITS(*int_type) == 32) |
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jsonw_printf(jw, "%u", *(__u32 *)data); |
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else if (BTF_INT_BITS(*int_type) == 16) |
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jsonw_printf(jw, "%hu", *(__u16 *)data); |
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else if (BTF_INT_BITS(*int_type) == 8) |
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jsonw_printf(jw, "%hhu", *(__u8 *)data); |
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else |
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btf_dumper_int_bits(*int_type, bit_offset, data, jw, |
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is_plain_text); |
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break; |
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case BTF_INT_SIGNED: |
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if (BTF_INT_BITS(*int_type) == 64) |
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jsonw_printf(jw, "%lld", *(long long *)data); |
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else if (BTF_INT_BITS(*int_type) == 32) |
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jsonw_printf(jw, "%d", *(int *)data); |
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else if (BTF_INT_BITS(*int_type) == 16) |
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jsonw_printf(jw, "%hd", *(short *)data); |
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else if (BTF_INT_BITS(*int_type) == 8) |
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jsonw_printf(jw, "%hhd", *(char *)data); |
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else |
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btf_dumper_int_bits(*int_type, bit_offset, data, jw, |
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is_plain_text); |
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break; |
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case BTF_INT_CHAR: |
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if (isprint(*(char *)data)) |
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jsonw_printf(jw, "\"%c\"", *(char *)data); |
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else |
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if (is_plain_text) |
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jsonw_printf(jw, "0x%hhx", *(char *)data); |
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else |
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jsonw_printf(jw, "\"\\u00%02hhx\"", |
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*(char *)data); |
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break; |
|
case BTF_INT_BOOL: |
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jsonw_bool(jw, *(int *)data); |
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break; |
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default: |
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/* shouldn't happen */ |
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return -EINVAL; |
|
} |
|
|
|
return 0; |
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} |
|
|
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static int btf_dumper_struct(const struct btf_dumper *d, __u32 type_id, |
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const void *data) |
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{ |
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const struct btf_type *t; |
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struct btf_member *m; |
|
const void *data_off; |
|
int kind_flag; |
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int ret = 0; |
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int i, vlen; |
|
|
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t = btf__type_by_id(d->btf, type_id); |
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if (!t) |
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return -EINVAL; |
|
|
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kind_flag = BTF_INFO_KFLAG(t->info); |
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vlen = BTF_INFO_VLEN(t->info); |
|
jsonw_start_object(d->jw); |
|
m = (struct btf_member *)(t + 1); |
|
|
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for (i = 0; i < vlen; i++) { |
|
__u32 bit_offset = m[i].offset; |
|
__u32 bitfield_size = 0; |
|
|
|
if (kind_flag) { |
|
bitfield_size = BTF_MEMBER_BITFIELD_SIZE(bit_offset); |
|
bit_offset = BTF_MEMBER_BIT_OFFSET(bit_offset); |
|
} |
|
|
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jsonw_name(d->jw, btf__name_by_offset(d->btf, m[i].name_off)); |
|
data_off = data + BITS_ROUNDDOWN_BYTES(bit_offset); |
|
if (bitfield_size) { |
|
btf_dumper_bitfield(bitfield_size, |
|
BITS_PER_BYTE_MASKED(bit_offset), |
|
data_off, d->jw, d->is_plain_text); |
|
} else { |
|
ret = btf_dumper_do_type(d, m[i].type, |
|
BITS_PER_BYTE_MASKED(bit_offset), |
|
data_off); |
|
if (ret) |
|
break; |
|
} |
|
} |
|
|
|
jsonw_end_object(d->jw); |
|
|
|
return ret; |
|
} |
|
|
|
static int btf_dumper_var(const struct btf_dumper *d, __u32 type_id, |
|
__u8 bit_offset, const void *data) |
|
{ |
|
const struct btf_type *t = btf__type_by_id(d->btf, type_id); |
|
int ret; |
|
|
|
jsonw_start_object(d->jw); |
|
jsonw_name(d->jw, btf__name_by_offset(d->btf, t->name_off)); |
|
ret = btf_dumper_do_type(d, t->type, bit_offset, data); |
|
jsonw_end_object(d->jw); |
|
|
|
return ret; |
|
} |
|
|
|
static int btf_dumper_datasec(const struct btf_dumper *d, __u32 type_id, |
|
const void *data) |
|
{ |
|
struct btf_var_secinfo *vsi; |
|
const struct btf_type *t; |
|
int ret = 0, i, vlen; |
|
|
|
t = btf__type_by_id(d->btf, type_id); |
|
if (!t) |
|
return -EINVAL; |
|
|
|
vlen = BTF_INFO_VLEN(t->info); |
|
vsi = (struct btf_var_secinfo *)(t + 1); |
|
|
|
jsonw_start_object(d->jw); |
|
jsonw_name(d->jw, btf__name_by_offset(d->btf, t->name_off)); |
|
jsonw_start_array(d->jw); |
|
for (i = 0; i < vlen; i++) { |
|
ret = btf_dumper_do_type(d, vsi[i].type, 0, data + vsi[i].offset); |
|
if (ret) |
|
break; |
|
} |
|
jsonw_end_array(d->jw); |
|
jsonw_end_object(d->jw); |
|
|
|
return ret; |
|
} |
|
|
|
static int btf_dumper_do_type(const struct btf_dumper *d, __u32 type_id, |
|
__u8 bit_offset, const void *data) |
|
{ |
|
const struct btf_type *t = btf__type_by_id(d->btf, type_id); |
|
|
|
switch (BTF_INFO_KIND(t->info)) { |
|
case BTF_KIND_INT: |
|
return btf_dumper_int(t, bit_offset, data, d->jw, |
|
d->is_plain_text); |
|
case BTF_KIND_STRUCT: |
|
case BTF_KIND_UNION: |
|
return btf_dumper_struct(d, type_id, data); |
|
case BTF_KIND_ARRAY: |
|
return btf_dumper_array(d, type_id, data); |
|
case BTF_KIND_ENUM: |
|
return btf_dumper_enum(d, t, data); |
|
case BTF_KIND_PTR: |
|
btf_dumper_ptr(d, t, data); |
|
return 0; |
|
case BTF_KIND_UNKN: |
|
jsonw_printf(d->jw, "(unknown)"); |
|
return 0; |
|
case BTF_KIND_FWD: |
|
/* map key or value can't be forward */ |
|
jsonw_printf(d->jw, "(fwd-kind-invalid)"); |
|
return -EINVAL; |
|
case BTF_KIND_TYPEDEF: |
|
case BTF_KIND_VOLATILE: |
|
case BTF_KIND_CONST: |
|
case BTF_KIND_RESTRICT: |
|
return btf_dumper_modifier(d, type_id, bit_offset, data); |
|
case BTF_KIND_VAR: |
|
return btf_dumper_var(d, type_id, bit_offset, data); |
|
case BTF_KIND_DATASEC: |
|
return btf_dumper_datasec(d, type_id, data); |
|
default: |
|
jsonw_printf(d->jw, "(unsupported-kind"); |
|
return -EINVAL; |
|
} |
|
} |
|
|
|
int btf_dumper_type(const struct btf_dumper *d, __u32 type_id, |
|
const void *data) |
|
{ |
|
return btf_dumper_do_type(d, type_id, 0, data); |
|
} |
|
|
|
#define BTF_PRINT_ARG(...) \ |
|
do { \ |
|
pos += snprintf(func_sig + pos, size - pos, \ |
|
__VA_ARGS__); \ |
|
if (pos >= size) \ |
|
return -1; \ |
|
} while (0) |
|
#define BTF_PRINT_TYPE(type) \ |
|
do { \ |
|
pos = __btf_dumper_type_only(btf, type, func_sig, \ |
|
pos, size); \ |
|
if (pos == -1) \ |
|
return -1; \ |
|
} while (0) |
|
|
|
static int __btf_dumper_type_only(const struct btf *btf, __u32 type_id, |
|
char *func_sig, int pos, int size) |
|
{ |
|
const struct btf_type *proto_type; |
|
const struct btf_array *array; |
|
const struct btf_var *var; |
|
const struct btf_type *t; |
|
|
|
if (!type_id) { |
|
BTF_PRINT_ARG("void "); |
|
return pos; |
|
} |
|
|
|
t = btf__type_by_id(btf, type_id); |
|
|
|
switch (BTF_INFO_KIND(t->info)) { |
|
case BTF_KIND_INT: |
|
case BTF_KIND_TYPEDEF: |
|
case BTF_KIND_FLOAT: |
|
BTF_PRINT_ARG("%s ", btf__name_by_offset(btf, t->name_off)); |
|
break; |
|
case BTF_KIND_STRUCT: |
|
BTF_PRINT_ARG("struct %s ", |
|
btf__name_by_offset(btf, t->name_off)); |
|
break; |
|
case BTF_KIND_UNION: |
|
BTF_PRINT_ARG("union %s ", |
|
btf__name_by_offset(btf, t->name_off)); |
|
break; |
|
case BTF_KIND_ENUM: |
|
BTF_PRINT_ARG("enum %s ", |
|
btf__name_by_offset(btf, t->name_off)); |
|
break; |
|
case BTF_KIND_ARRAY: |
|
array = (struct btf_array *)(t + 1); |
|
BTF_PRINT_TYPE(array->type); |
|
BTF_PRINT_ARG("[%d]", array->nelems); |
|
break; |
|
case BTF_KIND_PTR: |
|
BTF_PRINT_TYPE(t->type); |
|
BTF_PRINT_ARG("* "); |
|
break; |
|
case BTF_KIND_FWD: |
|
BTF_PRINT_ARG("%s %s ", |
|
BTF_INFO_KFLAG(t->info) ? "union" : "struct", |
|
btf__name_by_offset(btf, t->name_off)); |
|
break; |
|
case BTF_KIND_VOLATILE: |
|
BTF_PRINT_ARG("volatile "); |
|
BTF_PRINT_TYPE(t->type); |
|
break; |
|
case BTF_KIND_CONST: |
|
BTF_PRINT_ARG("const "); |
|
BTF_PRINT_TYPE(t->type); |
|
break; |
|
case BTF_KIND_RESTRICT: |
|
BTF_PRINT_ARG("restrict "); |
|
BTF_PRINT_TYPE(t->type); |
|
break; |
|
case BTF_KIND_FUNC_PROTO: |
|
pos = btf_dump_func(btf, func_sig, t, NULL, pos, size); |
|
if (pos == -1) |
|
return -1; |
|
break; |
|
case BTF_KIND_FUNC: |
|
proto_type = btf__type_by_id(btf, t->type); |
|
pos = btf_dump_func(btf, func_sig, proto_type, t, pos, size); |
|
if (pos == -1) |
|
return -1; |
|
break; |
|
case BTF_KIND_VAR: |
|
var = (struct btf_var *)(t + 1); |
|
if (var->linkage == BTF_VAR_STATIC) |
|
BTF_PRINT_ARG("static "); |
|
BTF_PRINT_TYPE(t->type); |
|
BTF_PRINT_ARG(" %s", |
|
btf__name_by_offset(btf, t->name_off)); |
|
break; |
|
case BTF_KIND_DATASEC: |
|
BTF_PRINT_ARG("section (\"%s\") ", |
|
btf__name_by_offset(btf, t->name_off)); |
|
break; |
|
case BTF_KIND_UNKN: |
|
default: |
|
return -1; |
|
} |
|
|
|
return pos; |
|
} |
|
|
|
static int btf_dump_func(const struct btf *btf, char *func_sig, |
|
const struct btf_type *func_proto, |
|
const struct btf_type *func, int pos, int size) |
|
{ |
|
int i, vlen; |
|
|
|
BTF_PRINT_TYPE(func_proto->type); |
|
if (func) |
|
BTF_PRINT_ARG("%s(", btf__name_by_offset(btf, func->name_off)); |
|
else |
|
BTF_PRINT_ARG("("); |
|
vlen = BTF_INFO_VLEN(func_proto->info); |
|
for (i = 0; i < vlen; i++) { |
|
struct btf_param *arg = &((struct btf_param *)(func_proto + 1))[i]; |
|
|
|
if (i) |
|
BTF_PRINT_ARG(", "); |
|
if (arg->type) { |
|
BTF_PRINT_TYPE(arg->type); |
|
if (arg->name_off) |
|
BTF_PRINT_ARG("%s", |
|
btf__name_by_offset(btf, arg->name_off)); |
|
else if (pos && func_sig[pos - 1] == ' ') |
|
/* Remove unnecessary space for |
|
* FUNC_PROTO that does not have |
|
* arg->name_off |
|
*/ |
|
func_sig[--pos] = '\0'; |
|
} else { |
|
BTF_PRINT_ARG("..."); |
|
} |
|
} |
|
BTF_PRINT_ARG(")"); |
|
|
|
return pos; |
|
} |
|
|
|
void btf_dumper_type_only(const struct btf *btf, __u32 type_id, char *func_sig, |
|
int size) |
|
{ |
|
int err; |
|
|
|
func_sig[0] = '\0'; |
|
if (!btf) |
|
return; |
|
|
|
err = __btf_dumper_type_only(btf, type_id, func_sig, 0, size); |
|
if (err < 0) |
|
func_sig[0] = '\0'; |
|
} |
|
|
|
static const char *ltrim(const char *s) |
|
{ |
|
while (isspace(*s)) |
|
s++; |
|
|
|
return s; |
|
} |
|
|
|
void btf_dump_linfo_plain(const struct btf *btf, |
|
const struct bpf_line_info *linfo, |
|
const char *prefix, bool linum) |
|
{ |
|
const char *line = btf__name_by_offset(btf, linfo->line_off); |
|
|
|
if (!line) |
|
return; |
|
line = ltrim(line); |
|
|
|
if (!prefix) |
|
prefix = ""; |
|
|
|
if (linum) { |
|
const char *file = btf__name_by_offset(btf, linfo->file_name_off); |
|
|
|
/* More forgiving on file because linum option is |
|
* expected to provide more info than the already |
|
* available src line. |
|
*/ |
|
if (!file) |
|
file = ""; |
|
|
|
printf("%s%s [file:%s line_num:%u line_col:%u]\n", |
|
prefix, line, file, |
|
BPF_LINE_INFO_LINE_NUM(linfo->line_col), |
|
BPF_LINE_INFO_LINE_COL(linfo->line_col)); |
|
} else { |
|
printf("%s%s\n", prefix, line); |
|
} |
|
} |
|
|
|
void btf_dump_linfo_json(const struct btf *btf, |
|
const struct bpf_line_info *linfo, bool linum) |
|
{ |
|
const char *line = btf__name_by_offset(btf, linfo->line_off); |
|
|
|
if (line) |
|
jsonw_string_field(json_wtr, "src", ltrim(line)); |
|
|
|
if (linum) { |
|
const char *file = btf__name_by_offset(btf, linfo->file_name_off); |
|
|
|
if (file) |
|
jsonw_string_field(json_wtr, "file", file); |
|
|
|
if (BPF_LINE_INFO_LINE_NUM(linfo->line_col)) |
|
jsonw_int_field(json_wtr, "line_num", |
|
BPF_LINE_INFO_LINE_NUM(linfo->line_col)); |
|
|
|
if (BPF_LINE_INFO_LINE_COL(linfo->line_col)) |
|
jsonw_int_field(json_wtr, "line_col", |
|
BPF_LINE_INFO_LINE_COL(linfo->line_col)); |
|
} |
|
}
|
|
|