Loaded the executable part of an ELF file.

git-svn-id: svn://svn.gna.org/svn/chrysalide/trunk@10 abbe820e-26c8-41b2-8c08-b7b2b41f8b0a

2 files changed, 107 insertions, 0 deletions

diff --git a/src/format/elf/format_elf.c b/src/format/elf/format_elf.c
index f043d0a..b70eef5 100644
--- a/src/format/elf/format_elf.c
+++ b/src/format/elf/format_elf.c
@@ -22,3 +22,104 @@
 
 
 #include "elf.h"
+
+
+
+
+
+
+
+
+
+
+#include <ctype.h>
+#include <elf.h>
+#include <malloc.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+
+char *read_section_names(const uint8_t *content, Elf32_Off offset)
+{
+    char *result;
+    Elf32_Shdr section;
+
+    result = NULL;
+
+    memcpy(&section, &content[offset], sizeof(Elf32_Shdr));
+
+    result = (char *)calloc(section.sh_size + 1, sizeof(char));
+
+    memcpy(result, &content[section.sh_offset], section.sh_size);
+
+    return result;
+
+}
+
+
+bool find_target_section(const uint8_t *content, const char *target, const char *names, Elf32_Off offset, Elf32_Shdr *data)
+{
+    bool result;
+    Elf32_Shdr section;
+
+    result = false;
+
+    memcpy(&section, &content[offset], sizeof(Elf32_Shdr));
+
+    result = (strcmp(target, &names[section.sh_name]) == 0);
+
+    if (result)
+    {
+        printf("section: %s (0x%08x)\n", &names[section.sh_name], section.sh_addr);
+        *data = section;
+    }
+
+    return result;
+
+}
+
+
+
+bool find_text_data(const uint8_t *content, off_t *offset, off_t *size)
+{
+    bool result;
+    Elf32_Ehdr header;
+    char *names;
+    Elf32_Half i;
+    Elf32_Shdr data;
+
+    result = false;
+
+    memcpy(&header, content, sizeof(Elf32_Ehdr));
+
+    names = read_section_names(content, header.e_shoff + header.e_shentsize * header.e_shstrndx);
+    if (names == NULL)
+    {
+        fprintf(stderr, "no section header string table\n");
+        return NULL;
+    }
+
+    for (i = 0; i < header.e_shnum; i++)
+    {
+        if (i == header.e_shstrndx) continue;
+
+        if (find_target_section(content, ".text", names, header.e_shoff + header.e_shentsize * i, &data))
+        {
+            printf("Find it !\n");
+
+            *offset = data.sh_offset;
+            *size = data.sh_size;
+
+            result = true;
+
+        }
+
+    }
+
+    free(names);
+
+    return result;
+
+}
diff --git a/src/format/elf/format_elf.h b/src/format/elf/format_elf.h
index 894623a..feca71d 100644
--- a/src/format/elf/format_elf.h
+++ b/src/format/elf/format_elf.h
@@ -26,9 +26,15 @@
 
 
 
+#include <stdbool.h>
+#include <stdint.h>
+#include <sys/types.h>
 
 
 
+bool find_text_data(const uint8_t *content, off_t *, off_t *);
+
+
 
 
 #endif  /* _FORMAT_ELF_H */