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-rw-r--r--src/format/elf/e_elf.c128
-rw-r--r--src/format/elf/e_elf.h5
-rw-r--r--src/format/elf/elf-int.h23
-rw-r--r--src/format/elf/section.c3
4 files changed, 159 insertions, 0 deletions
diff --git a/src/format/elf/e_elf.c b/src/format/elf/e_elf.c
index f716846..3aa9394 100644
--- a/src/format/elf/e_elf.c
+++ b/src/format/elf/e_elf.c
@@ -35,6 +35,10 @@
+
+
+
+
/******************************************************************************
* *
* Paramètres : content = contenu binaire à parcourir. *
@@ -53,17 +57,39 @@ elf_format *load_elf(const uint8_t *content, off_t length)
elf_format *result; /* Structure à retourner */
bool test; /* Bilan d'une initialisation */
+
+ Elf32_Half i;
+ Elf32_Phdr phdr;
+
+ size_t count;
+
+
result = (elf_format *)calloc(1, sizeof(elf_format));
EXE_FORMAT(result)->content = content;
EXE_FORMAT(result)->length = length;
+ EXE_FORMAT(result)->get_def_parts = (get_def_parts_fc)get_elf_default_code_parts;
EXE_FORMAT(result)->find_section = (find_section_fc)find_elf_section;
EXE_FORMAT(result)->get_symbols = (get_symbols_fc)get_elf_symbols;
EXE_FORMAT(result)->resolve_symbol = (resolve_symbol_fc)resolve_elf_symbol;
memcpy(&result->header, content, sizeof(Elf32_Ehdr));
+ result->is_32b = true;
+
+
+ for (i = 0; i < result->header.e_phnum; i++)
+ {
+
+ memcpy(&phdr, &content[result->header.e_phoff + i * result->header.e_phentsize], result->header.e_phentsize);
+
+
+ printf(" seg [0x%08x] :: %d -> %d\n", phdr.p_type, phdr.p_offset, phdr.p_filesz);
+
+
+ }
+
test = read_elf_section_names(result);
@@ -74,6 +100,108 @@ elf_format *load_elf(const uint8_t *content, off_t length)
printf("ok ? %d\n", test);
+
+ return result;
+
+}
+
+
+
+
+
+/******************************************************************************
+* *
+* Paramètres : format = informations chargées à consulter. *
+* count = quantité de zones listées. [OUT] *
+* *
+* Description : Fournit les références aux zones de code à analyser. *
+* *
+* Retour : Zones de code à analyser. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+bin_part **get_elf_default_code_parts(const elf_format *format, size_t *count)
+{
+ bin_part **result; /* Tableau à retourner */
+ bin_part *part; /* Partie à intégrer à la liste*/
+ off_t offset; /* Position physique */
+ off_t size; /* Taille de la partie */
+ uint64_t voffset; /* Adresse virtuelle éventuelle*/
+ int i; /* Boucle de parcours */
+ Elf_Shdr shdr; /* En-tête de programme ELF */
+
+ result = NULL;
+ *count = 0;
+
+ if (format->sec_size > 0)
+ {
+ if (find_elf_section(format, ".init", &offset, &size, &voffset))
+ {
+ part = create_bin_part();
+
+ set_bin_part_name(part, ".init");
+ set_bin_part_values(part, offset, size, voffset);
+
+ result = (bin_part **)realloc(result, ++(*count) * sizeof(bin_part *));
+ result[*count - 1] = part;
+
+ }
+
+ if (find_elf_section(format, ".text", &offset, &size, &voffset))
+ {
+ part = create_bin_part();
+
+ set_bin_part_name(part, ".text");
+ set_bin_part_values(part, offset, size, voffset);
+
+ result = (bin_part **)realloc(result, ++(*count) * sizeof(bin_part *));
+ result[*count - 1] = part;
+
+ }
+
+ if (find_elf_section(format, ".fini", &offset, &size, &voffset))
+ {
+ part = create_bin_part();
+
+ set_bin_part_name(part, ".fini");
+ set_bin_part_values(part, offset, size, voffset);
+
+ result = (bin_part **)realloc(result, ++(*count) * sizeof(bin_part *));
+ result[*count - 1] = part;
+
+ }
+
+ }
+
+ /* Si aucune section n'a été trouvée... */
+
+ if (*count == 0)
+ for (i = 0; i < format->header.e_shnum; i++)
+ {
+ offset = format->header.e_shoff + format->header.e_shentsize * i;
+ if ((offset + format->header.e_shentsize) >= EXE_FORMAT(format)->length) break;
+
+ memcpy(&shdr, &EXE_FORMAT(format)->content[offset], format->header.e_shentsize);
+
+ if (ELF_SHDR(format, shdr, sh_flags) & SHF_EXECINSTR)
+ {
+ part = create_bin_part();
+
+ /* TODO : nom */
+
+ set_bin_part_values(part, ELF_SHDR(format, shdr, sh_offset),
+ ELF_SHDR(format, shdr, sh_size),
+ ELF_SHDR(format, shdr, sh_addr));
+
+ result = (bin_part **)realloc(result, ++(*count) * sizeof(bin_part *));
+ result[*count - 1] = part;
+
+ }
+
+ }
+
return result;
}
diff --git a/src/format/elf/e_elf.h b/src/format/elf/e_elf.h
index e101fc6..b11fb24 100644
--- a/src/format/elf/e_elf.h
+++ b/src/format/elf/e_elf.h
@@ -42,6 +42,11 @@ typedef struct _elf_format elf_format;
/* Prend en charge un nouvel ELF. */
elf_format *load_elf(const uint8_t *, off_t);
+
+
+/* Fournit les références aux zones de code à analyser. */
+bin_part **get_elf_default_code_parts(const elf_format *, size_t *);
+
/* Récupère tous les symboles présents dans le contenu binaire. */
size_t get_elf_symbols(const elf_format *, char ***, SymbolType **, uint64_t **);
diff --git a/src/format/elf/elf-int.h b/src/format/elf/elf-int.h
index 2ec33c3..f366c71 100644
--- a/src/format/elf/elf-int.h
+++ b/src/format/elf/elf-int.h
@@ -50,6 +50,7 @@ struct _elf_format
exe_format dummy; /* A laisser en premier */
Elf32_Ehdr header; /* En-tête du format */
+ bool is_32b; /* Format du binaire */
char *sec_names; /* Noms des sections */
size_t sec_size; /* Taille de ces définitions */
@@ -61,6 +62,28 @@ struct _elf_format
+/* En-tête de section ELF */
+typedef union _Elf_Shdr
+{
+ Elf32_Shdr section32; /* Version 32 bits */
+ Elf64_Shdr section64; /* Version 64 bits */
+
+} Elf_Shdr;
+
+#define ELF_SHDR(fmt, sec, fld) (fmt->is_32b ? sec.section32.fld : sec.section64.fld)
+
+
+/* En-tête de programme ELF */
+typedef union _Elf_Phdr
+{
+ Elf32_Phdr header32; /* Version 32 bits */
+ Elf64_Phdr header64; /* Version 64 bits */
+
+} Elf_Phdr;
+
+#define ELF_PHDR(fmt, hdr, fld) (fmt->is_32b ? hdr.header32.fld : hdr.header64.fld)
+
+
#endif /* _FORMAT_ELF_ELF_INT_H */
diff --git a/src/format/elf/section.c b/src/format/elf/section.c
index a055f47..f16e002 100644
--- a/src/format/elf/section.c
+++ b/src/format/elf/section.c
@@ -130,6 +130,9 @@ bool find_elf_section(const elf_format *format, const char *target, off_t *offse
Elf32_Half i;
Elf32_Shdr data;
+ /* Si on perd notre temps... */
+ if (format->sec_size == 0) return false;
+
result = false;
for (i = 0; i < format->header.e_shnum; i++)
generated by cgit v0.11.2-87-g4458 at 2024-06-01 16:41:55 (GMT)