Rizin
unix-like reverse engineering framework and cli tools
Functions
elf_dynamic.c File Reference
#include "elf_dynamic.h"

Go to the source code of this file.

Functions

static bool get_dt_info (RzBinElfDtDynamic *ptr, ut64 key, ut64 *info)
 
static bool get_dynamic_entry_aux (ELFOBJ *bin, ut64 offset, Elf_(Dyn) *entry)
 
static bool get_dynamic_entry (ELFOBJ *bin, ut64 offset, Elf_(Dyn) *entry)
 
static bool add_dt_dynamic_entry (RzBinElfDtDynamic *ptr, ut64 key, ut64 info)
 
static bool fill_dt_dynamic (ELFOBJ *bin, RzBinElfDtDynamic *ptr, ut64 offset, ut64 size)
 
static bool init_dt_dynamic (ELFOBJ *bin, RzBinElfDtDynamic *ptr)
 
RZ_BORROW RzVector *Elf_() rz_bin_elf_get_dt_needed (RZ_NONNULL ELFOBJ *bin)
 
RZ_OWN RzBinElfDtDynamic *Elf_() rz_bin_elf_dt_dynamic_new (RZ_NONNULL ELFOBJ *bin)
 
bool Elf_() rz_bin_elf_get_dt_info (RZ_NONNULL ELFOBJ *bin, ut64 key, RZ_OUT ut64 *info)
 
bool Elf_() rz_bin_elf_has_dt_dynamic (RZ_NONNULL ELFOBJ *bin)
 
void Elf_() rz_bin_elf_dt_dynamic_free (RzBinElfDtDynamic *ptr)
 

Function Documentation

◆ add_dt_dynamic_entry()

static bool add_dt_dynamic_entry ( RzBinElfDtDynamic *  ptr,
ut64  key,
ut64  info 
)
static

Definition at line 36 of file elf_dynamic.c.

36  {
37  if (key == DT_NEEDED) {
38  return !!rz_vector_push(&ptr->dt_needed, &info);
39  } else {
40  return ht_uu_insert(ptr->info, key, info);
41  }
42 }
info
RzBinInfo * info(RzBinFile *bf)
Definition: bin_ne.c:86
key
static static sync static getppid static getegid const char static filename char static len const char char static bufsiz static mask static vfork const void static prot static getpgrp const char static swapflags static arg static fd static protocol static who struct sockaddr static addrlen static backlog struct timeval struct timezone static tz const struct iovec static count static mode const void const struct sockaddr static tolen const char static pathname void static offset struct stat static buf void long static basep static whence static length const void static len key
Definition: sflib.h:118
DT_NEEDED
#define DT_NEEDED
Definition: common.h:538
rz_vector_push
RZ_API void * rz_vector_push(RzVector *vec, void *x)
Definition: vector.c:197
rz_bin_elf_dt_dynamic_t::info
HtUU * info
Definition: elf_dynamic.h:12
rz_bin_elf_dt_dynamic_t::dt_needed
RzVector dt_needed
Definition: elf_dynamic.h:13

References DT_NEEDED, rz_bin_elf_dt_dynamic_t::dt_needed, rz_bin_elf_dt_dynamic_t::info, info(), key, and rz_vector_push().

Referenced by fill_dt_dynamic().

◆ fill_dt_dynamic()

static bool fill_dt_dynamic ( ELFOBJ *  bin,
RzBinElfDtDynamic *  ptr,
ut64  offset,
ut64  size 
)
static

Definition at line 44 of file elf_dynamic.c.

44  {
45  for (ut64 entry_offset = offset; entry_offset < offset + size; entry_offset += sizeof(Elf_(Dyn))) {
46  Elf_(Dyn) entry;
47  if (!get_dynamic_entry(bin, entry_offset, &entry)) {
48  return false;
49  }
50 
51  if (entry.d_tag == DT_NULL) {
52  break;
53  }
54 
55  if (get_dt_info(ptr, entry.d_tag, NULL)) {
56  RZ_LOG_WARN("DT_DYNAMIC entry (0x%" PFMT64x ") at 0x%" PFMT64x " was already handled.\n", (ut64)entry.d_tag, offset);
57  }
58 
59  if (!add_dt_dynamic_entry(ptr, entry.d_tag, entry.d_un.d_val)) {
60  return false;
61  }
62  }
63 
64  return true;
65 }
NULL
#define NULL
Definition: cris-opc.c:27
get_dt_info
static bool get_dt_info(RzBinElfDtDynamic *ptr, ut64 key, ut64 *info)
Definition: elf_dynamic.c:7
get_dynamic_entry
static bool get_dynamic_entry(ELFOBJ *bin, ut64 offset, Elf_(Dyn) *entry)
Definition: elf_dynamic.c:27
add_dt_dynamic_entry
static bool add_dt_dynamic_entry(RzBinElfDtDynamic *ptr, ut64 key, ut64 info)
Definition: elf_dynamic.c:36
Elf_
#define Elf_(name)
Definition: elf_specs.h:32
size
voidpf void uLong size
Definition: ioapi.h:138
offset
voidpf uLong offset
Definition: ioapi.h:144
DT_NULL
#define DT_NULL
Definition: common.h:537
RZ_LOG_WARN
#define RZ_LOG_WARN(fmtstr,...)
Definition: rz_log.h:56
PFMT64x
#define PFMT64x
Definition: rz_types.h:393
bin
Definition: malloc.c:26
entry
Definition: zipcmp.c:77
ut64
ut64(WINAPI *w32_GetEnabledXStateFeatures)()

References add_dt_dynamic_entry(), DT_NULL, Elf_, get_dt_info(), get_dynamic_entry(), NULL, PFMT64x, RZ_LOG_WARN, and ut64().

Referenced by init_dt_dynamic().

◆ get_dt_info()

static bool get_dt_info ( RzBinElfDtDynamic *  ptr,
ut64  key,
ut64 *  info 
)
static

Definition at line 7 of file elf_dynamic.c.

7  {
8  bool found = false;
9  ut64 tmp = ht_uu_find(ptr->info, key, &found);
10 
11  if (!found) {
12  return false;
13  }
14 
15  if (info) {
16  *info = tmp;
17  }
18 
19  return true;
20 }
found
RZ_API const KEY_TYPE bool * found
Definition: ht_inc.h:130
autogen_x86imm.tmp
tmp
Definition: autogen_x86imm.py:12

References found, rz_bin_elf_dt_dynamic_t::info, info(), key, autogen_x86imm::tmp, and ut64().

Referenced by fill_dt_dynamic(), and rz_bin_elf_get_dt_info().

◆ get_dynamic_entry()

static bool get_dynamic_entry ( ELFOBJ *  bin,
ut64  offset,
Elf_(Dyn) *  entry 
)
static

Definition at line 27 of file elf_dynamic.c.

27  {
28  if (!get_dynamic_entry_aux(bin, offset, entry)) {
29  RZ_LOG_WARN("Failed to read DT_DYNAMIC entry at 0x%" PFMT64x ".\n", offset);
30  return false;
31  }
32 
33  return true;
34 }
get_dynamic_entry_aux
static bool get_dynamic_entry_aux(ELFOBJ *bin, ut64 offset, Elf_(Dyn) *entry)
Definition: elf_dynamic.c:22

References get_dynamic_entry_aux(), PFMT64x, and RZ_LOG_WARN.

Referenced by fill_dt_dynamic().

◆ get_dynamic_entry_aux()

static bool get_dynamic_entry_aux ( ELFOBJ *  bin,
ut64  offset,
Elf_(Dyn) *  entry 
)
static

Definition at line 22 of file elf_dynamic.c.

22  {
23  return Elf_(rz_bin_elf_read_sword_sxword)(bin, &offset, &entry->d_tag) &&
24  Elf_(rz_bin_elf_read_addr)(bin, &offset, &entry->d_un.d_ptr);
25 }
rz_bin_elf_read_addr
bool Elf_() rz_bin_elf_read_addr(RZ_NONNULL ELFOBJ *bin, RZ_NONNULL RZ_INOUT ut64 *offset, RZ_NONNULL RZ_OUT Elf_(Addr) *result)
Definition: elf_misc.c:82
rz_bin_elf_read_sword_sxword
bool Elf_() rz_bin_elf_read_sword_sxword(RZ_NONNULL ELFOBJ *bin, RZ_NONNULL RZ_INOUT ut64 *offset, RZ_NONNULL RZ_OUT Elf_(Sword) *result)
Definition: elf_misc.c:131

References Elf_, rz_bin_elf_read_addr(), and rz_bin_elf_read_sword_sxword().

Referenced by get_dynamic_entry().

◆ init_dt_dynamic()

static bool init_dt_dynamic ( ELFOBJ *  bin,
RzBinElfDtDynamic *  ptr 
)
static

Definition at line 67 of file elf_dynamic.c.

67  {
68  RzBinElfSegment *segment = Elf_(rz_bin_elf_get_segment_with_type)(bin, PT_DYNAMIC);
69  if (!segment) {
70  RZ_LOG_WARN("No PT_DYNAMIC segment in the ELF binary.\n")
71  return false;
72  }
73 
74  if (!segment->is_valid) {
75  RZ_LOG_WARN("The PT_DYNAMIC segment is invalid.\n");
76  return false;
77  }
78 
79  ut64 offset = Elf_(rz_bin_elf_v2p)(bin, segment->data.p_vaddr);
80  if (offset == UT64_MAX) {
81  RZ_LOG_INFO("Failed to convert PT_DYNAMIC segment p_vaddr to a physical offset.\n")
82  return false;
83  }
84 
85  return fill_dt_dynamic(bin, ptr, offset, segment->data.p_filesz);
86 }
is_valid
static bool is_valid(arm_reg reg)
Definition: analysis_arm_cs.c:1508
false
#define false
Definition: demangler_util.h:14
rz_bin_elf_v2p
ut64 Elf_() rz_bin_elf_v2p(RZ_NONNULL ELFOBJ *bin, ut64 vaddr)
Convert a virtual address to the physical address.
Definition: elf.c:429
RzBinElfSegment
RzBinElfSegment
Definition: elf.h:131
rz_bin_elf_get_segment_with_type
RZ_BORROW RzBinElfSegment *Elf_() rz_bin_elf_get_segment_with_type(RZ_NONNULL ELFOBJ *bin, Elf_(Word) type)
Definition: elf_segments.c:120
fill_dt_dynamic
static bool fill_dt_dynamic(ELFOBJ *bin, RzBinElfDtDynamic *ptr, ut64 offset, ut64 size)
Definition: elf_dynamic.c:44
PT_DYNAMIC
#define PT_DYNAMIC
Definition: common.h:304
RZ_LOG_INFO
#define RZ_LOG_INFO(fmtstr,...)
Definition: rz_log.h:54
UT64_MAX
#define UT64_MAX
Definition: rz_types_base.h:86
if
if(dbg->bits==RZ_SYS_BITS_64)
Definition: windows-arm64.h:4

References Elf_, fill_dt_dynamic(), PT_DYNAMIC, rz_bin_elf_get_segment_with_type(), rz_bin_elf_v2p(), RZ_LOG_INFO, RZ_LOG_WARN, RzBinElfSegment, ut64(), and UT64_MAX.

Referenced by rz_bin_elf_dt_dynamic_new().

◆ rz_bin_elf_dt_dynamic_free()

void Elf_() rz_bin_elf_dt_dynamic_free ( RzBinElfDtDynamic *  ptr)

Definition at line 135 of file elf_dynamic.c.

135  {
136  if (!ptr) {
137  return;
138  }
139 
140  ht_uu_free(ptr->info);
141  rz_vector_fini(&ptr->dt_needed);
142  free(ptr);
143 }
free
RZ_API void Ht_() free(HtName_(Ht) *ht)
Definition: ht_inc.c:130
rz_vector_fini
RZ_API void rz_vector_fini(RzVector *vec)
Definition: vector.c:61

References free(), and rz_vector_fini().

Referenced by rz_bin_elf_dt_dynamic_new(), and rz_bin_elf_free().

◆ rz_bin_elf_dt_dynamic_new()

RZ_OWN RzBinElfDtDynamic* Elf_() rz_bin_elf_dt_dynamic_new ( RZ_NONNULL ELFOBJ *  bin)

Definition at line 98 of file elf_dynamic.c.

98  {
99  RzBinElfDtDynamic *result = RZ_NEW0(RzBinElfDtDynamic);
100  if (!result) {
101  return NULL;
102  }
103 
104  result->info = ht_uu_new0();
105  if (!result->info) {
106  Elf_(rz_bin_elf_dt_dynamic_free)(result);
107  return NULL;
108  }
109 
110  rz_vector_init(&result->dt_needed, sizeof(ut64), NULL, NULL);
111 
112  if (!init_dt_dynamic(bin, result)) {
113  Elf_(rz_bin_elf_dt_dynamic_free)(result);
114  return NULL;
115  }
116 
117  return result;
118 }
init_dt_dynamic
static bool init_dt_dynamic(ELFOBJ *bin, RzBinElfDtDynamic *ptr)
Definition: elf_dynamic.c:67
rz_bin_elf_dt_dynamic_free
void Elf_() rz_bin_elf_dt_dynamic_free(RzBinElfDtDynamic *ptr)
Definition: elf_dynamic.c:135
RZ_NEW0
#define RZ_NEW0(x)
Definition: rz_types.h:284
rz_vector_init
RZ_API void rz_vector_init(RzVector *vec, size_t elem_size, RzVectorFree free, void *free_user)
Definition: vector.c:33
rz_bin_elf_dt_dynamic_t
Definition: elf_dynamic.h:11

References rz_bin_elf_dt_dynamic_t::dt_needed, Elf_, rz_bin_elf_dt_dynamic_t::info, init_dt_dynamic(), NULL, rz_bin_elf_dt_dynamic_free(), RZ_NEW0, rz_vector_init(), and ut64().

Referenced by init_dt_dynamic_aux().

◆ rz_bin_elf_get_dt_info()

bool Elf_() rz_bin_elf_get_dt_info ( RZ_NONNULL ELFOBJ *  bin,
ut64  key,
RZ_OUT ut64 *  info 
)

Definition at line 120 of file elf_dynamic.c.

120  {
121  rz_return_val_if_fail(bin, false);
122 
123  if (!Elf_(rz_bin_elf_has_dt_dynamic)(bin)) {
124  return false;
125  }
126 
127  return get_dt_info(bin->dt_dynamic, key, info);
128 }
rz_bin_elf_has_dt_dynamic
bool Elf_() rz_bin_elf_has_dt_dynamic(RZ_NONNULL ELFOBJ *bin)
Definition: elf_dynamic.c:130
rz_return_val_if_fail
#define rz_return_val_if_fail(expr, val)
Definition: rz_assert.h:108

References Elf_, get_dt_info(), info(), key, rz_bin_elf_has_dt_dynamic(), and rz_return_val_if_fail.

Referenced by create_section_plt(), Elf_(), elf_is_bind_now(), get_dynamic_elf_symbols(), get_gnu_verneed(), get_gnu_versym(), get_import_addr_arm(), get_import_addr_mips(), get_import_addr_ppc(), get_import_addr_riscv(), get_import_addr_x86(), get_import_addr_x86_manual(), get_main_offset_mips(), get_plt_name(), get_relocs_entry_from_dt_dynamic(), get_relocs_entry_from_dt_dynamic_aux(), get_sections_from_dt_dynamic(), get_versym_entry_sdb_from_verdef(), get_versym_entry_sdb_from_verneed(), has_dt_rpath_entry(), init_dynstr_aux(), rz_bin_elf_get_fini_offset(), rz_bin_elf_get_gnu_hash_table(), rz_bin_elf_get_hash_table(), rz_bin_elf_get_init_offset(), and rz_bin_elf_get_num_relocs_dynamic_plt().

◆ rz_bin_elf_get_dt_needed()

RZ_BORROW RzVector* Elf_() rz_bin_elf_get_dt_needed ( RZ_NONNULL ELFOBJ *  bin)

Definition at line 88 of file elf_dynamic.c.

88  {
89  rz_return_val_if_fail(bin, NULL);
90 
91  if (!Elf_(rz_bin_elf_has_dt_dynamic)(bin)) {
92  return NULL;
93  }
94 
95  return &bin->dt_dynamic->dt_needed;
96 }

References Elf_, NULL, rz_bin_elf_has_dt_dynamic(), and rz_return_val_if_fail.

Referenced by rz_bin_elf_get_libs().

◆ rz_bin_elf_has_dt_dynamic()

bool Elf_() rz_bin_elf_has_dt_dynamic ( RZ_NONNULL ELFOBJ *  bin)

Definition at line 130 of file elf_dynamic.c.

130  {
131  rz_return_val_if_fail(bin, false);
132  return bin->dt_dynamic;
133 }

References rz_return_val_if_fail.

Referenced by get_import_addr(), get_relocs_entry_from_dt_dynamic(), rz_bin_elf_get_dt_info(), rz_bin_elf_get_dt_needed(), rz_bin_elf_get_fini_offset(), rz_bin_elf_get_init_offset(), and rz_bin_elf_get_libs().