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-rwxr-xr-xbfd/load.py126
-rw-r--r--bfd/test/makefile5
2 files changed, 120 insertions, 11 deletions
diff --git a/bfd/load.py b/bfd/load.py
index cb53722..4e85ca7 100755
--- a/bfd/load.py
+++ b/bfd/load.py
@@ -63,13 +63,14 @@ class CLIArgParser(object):
parser.add_argument("--dumpfuncasm", type=str, help="dump a functions assembly code")
parser.add_argument("--textasm", action='store_true', help="disassemble the text section", default=False)
parser.add_argument("--dynsecents", action='store_true', help="dynamic section entries", default=False)
- parser.add_argument("--reladynents", action='store_true', help=".rela.dyn entries", default=False)
+ parser.add_argument("--reladyn", action='store_true', help=".rela.dyn entries", default=False)
+ parser.add_argument("--relaplt", action='store_true', help=".rela.plt entries", default=False)
self.args = parser.parse_args()
if self.args.obj is None:
raise Exception("no object file provided. please specify an object with --obj.")
-def byte2int(value):
- return int.from_bytes(value, byteorder="little", signed=False)
+def byte2int(value,sign = False):
+ return int.from_bytes(value, byteorder="little", signed=sign)
def byte2hex(value):
return hex(int.from_bytes(value, byteorder="little", signed=False))
@@ -475,14 +476,34 @@ class X86_REL_TYPE:
R_386_PC8 = 15
R_386_SIZE32 = 16
+def get_x86_rel_type(val):
+ if val == X86_REL_TYPE.R_386_NONE: return "R_386_NONE"
+ elif val == X86_REL_TYPE.R_386_32: return "R_386_32"
+ elif val == X86_REL_TYPE.R_386_PC32: return "R_386_PC32"
+ elif val == X86_REL_TYPE.R_386_GOT32: return "R_386_GOT32"
+ elif val == X86_REL_TYPE.R_386_PLT32: return "R_386_PLT32"
+ elif val == X86_REL_TYPE.R_386_COPY: return "R_386_COPY"
+ elif val == X86_REL_TYPE.R_386_GLOB_DAT: return "R_386_GLOB_DAT"
+ elif val == X86_REL_TYPE.R_386_JMP_SLOT: return "R_386_JMP_SLOT"
+ elif val == X86_REL_TYPE.R_386_RELATIVE: return "R_386_RELATIVE"
+ elif val == X86_REL_TYPE.R_386_GOTOFF: return "R_386_GOTOFF"
+ elif val == X86_REL_TYPE.R_386_GOTPC: return "R_386_GOTPC"
+ elif val == X86_REL_TYPE.R_386_32PLT: return "R_386_32PLT"
+ elif val == X86_REL_TYPE.R_386_16: return "R_386_16"
+ elif val == X86_REL_TYPE.R_386_PC16: return "R_386_PC16"
+ elif val == X86_REL_TYPE.R_386_8: return "R_386_8"
+ elif val == X86_REL_TYPE.R_386_PC8: return "R_386_PC8"
+ elif val == X86_REL_TYPE.R_386_SIZE32: return "R_386_SIZE32"
+ else: return "UNKNOWN"
+
class X86_64_REL_TYPE:
R_AMD64_NONE = 0
R_AMD64_64 = 1
R_AMD64_PC32 = 2
- R_AMD6_GOT32 = 3
+ R_AMD64_GOT32 = 3
R_AMD64_PLT32 = 4
R_AMD64_COPY = 5
- R_AMD64_GLOV_DAT = 6
+ R_AMD64_GLOB_DAT = 6
R_AMD64_JUMP_SLOT = 7
R_AMD64_RELATIVE = 8
R_AMD64_GOTPCREL = 9
@@ -498,6 +519,30 @@ class X86_64_REL_TYPE:
R_AMD64_SIZE32 = 32
R_AMD64_SIZE64 = 33
+def get_x86_64_rel_type(val):
+ if val == X86_64_REL_TYPE.R_AMD64_NONE: return "R_386_NONE"
+ elif val == X86_64_REL_TYPE.R_AMD64_64: return "R_AMD64_64"
+ elif val == X86_64_REL_TYPE.R_AMD64_PC32: return "R_AMD64_PC32"
+ elif val == X86_64_REL_TYPE.R_AMD64_GOT32: return "R_AMD64_GOT32"
+ elif val == X86_64_REL_TYPE.R_AMD64_PLT32: return "R_AMD64_PLT32"
+ elif val == X86_64_REL_TYPE.R_AMD64_COPY: return "R_AMD64_COPY"
+ elif val == X86_64_REL_TYPE.R_AMD64_GLOB_DAT: return "R_AMD64_GLOB_DAT"
+ elif val == X86_64_REL_TYPE.R_AMD64_JUMP_SLOT: return "R_AMD64_JUMP_SLOT"
+ elif val == X86_64_REL_TYPE.R_AMD64_RELATIVE: return "R_AMD64_RELATIVE"
+ elif val == X86_64_REL_TYPE.R_AMD64_GOTPCREL: return "R_AMD64_GOTPCREL"
+ elif val == X86_64_REL_TYPE.R_AMD64_32: return "R_AMD64_32"
+ elif val == X86_64_REL_TYPE.R_AMD64_32S: return "R_AMD64_32S"
+ elif val == X86_64_REL_TYPE.R_AMD64_16: return "R_AMD64_16"
+ elif val == X86_64_REL_TYPE.R_AMD64_PC16: return "R_AMD64_PC16"
+ elif val == X86_64_REL_TYPE.R_AMD64_8: return "R_AMD64_8"
+ elif val == X86_64_REL_TYPE.R_AMD64_PC8: return "R_AMD64_PC8"
+ elif val == X86_64_REL_TYPE.R_AMD64_PC64: return "R_AMD64_PC64"
+ elif val == X86_64_REL_TYPE.R_AMD64_GOTOFF64: return "R_AMD64_GOTOFF64"
+ elif val == X86_64_REL_TYPE.R_AMD64_GOTPC32: return "R_AMD64_GOTPC32"
+ elif val == X86_64_REL_TYPE.R_AMD64_SIZE32: return "R_AMD64_SIZE32"
+ elif val == X86_64_REL_TYPE.R_AMD64_SIZE64: return "R_AMD64_SIZE64"
+ else: return "UNKNOWN"
+
class ELF_ST_BIND:
STB_LOCAL = 0
STB_GLOBAL = 1
@@ -669,6 +714,8 @@ class ELF(object):
self.dyn_section_ents = []
self.rela_dyn = []
self.rela_dyn_ents = []
+ self.rela_plt = []
+ self.rela_plt_ents = []
def init(self, size):
self.size = size
@@ -703,7 +750,9 @@ class ELF(object):
self.pop_text_section()
self.get_ph_dyn_entries()
self.pop_dynamic_entries(".dynamic", self.dyn_section_ents)
- self.pop_dynamic_entries(".rela.dyn", self.rela_dyn_ents)
+ self.pop_rela(".rela.plt", self.rela_plt, self.rela_plt_ents)
+ self.pop_rela(".rela.dyn", self.rela_dyn, self.rela_dyn_ents)
+ #self.pop_rel()
def read_ELF_H(self, size):
self.elfhdr.ei_mag = self.so.read(4)
@@ -1027,14 +1076,30 @@ class ELF(object):
print(line)
def dump_dyn_sec_ents(self, who):
- header = ["type_string", "tag", "value"]
+ header = ["type_string", "tag", "value", "value(hex)"]
tag_string_list = [entry["type_string"] for entry in who]
tag_list = [entry["tag"] for entry in who]
value_list = [entry["value"] for entry in who]
- lines = ffs(2, header, True, tag_string_list, tag_list, value_list)
+ value_list_hex = [hex(entry["value"]) for entry in who]
+ lines = ffs(2, header, True, tag_string_list, tag_list, value_list, value_list_hex)
for line in lines:
print(line)
+ def dump_rela(self, to_dump):
+ header = ["r_offset", "r_info", "r_addend"]
+ r_offset_list = [entry["r_offset"] for entry in to_dump]
+ r_info_list = [entry["r_info"] for entry in to_dump]
+ addend_list = [entry["r_addend"] for entry in to_dump]
+ lines = ffs(2, header, True, r_offset_list, r_info_list, addend_list)
+ for line in lines: print(line)
+
+ def dump_rel(self, to_dump):
+ header = ["r_offset", "r_info"]
+ r_offset_list = [entry["r_offset"] for entry in to_dump]
+ r_info_list = [entry["r_info"] for entry in to_dump]
+ lines = ffs(2, header, True, r_offset_list, r_info_list)
+ for line in lines: print(line)
+
def get_st_entry_symbol_string(self, index, section_name):
symbol = []
for i in range(0, byte2int(self.elfhdr.e_shnum)):
@@ -1105,6 +1170,48 @@ class ELF(object):
struct_to_pop.append(dummy)
dummy = {}
+ def pop_rela(self, section_name, section_whole, to_pop):
+ size = int()
+ entsize = int()
+ dummy = {}
+ step = int()
+ if self.size == 64: step = 8
+ if self.size == 32: step = 4
+ for section in self.shhdr:
+ name = self.read_section_name(byte2int(section.sh_name))
+ if name == section_name:
+ self.so.seek(byte2int(section.sh_offset))
+ section_whole = self.so.read(byte2int(section.sh_size))
+ size = byte2int(section.sh_size)
+ entsize = byte2int(section.sh_entsize)
+ for i in range(0, int(size/entsize)):
+ dummy["r_offset"] = byte2int(section_whole[i*entsize:i*entsize+step])
+ dummy["r_info"] = byte2int(section_whole[i*entsize+step:i*entsize+(step*2)])
+ dummy["r_addend"] = byte2int(section_whole[i*entsize+(step*2):i*entsize+(step*3)], sign=True)
+ to_pop.append(dummy)
+ dummy = {}
+
+ def pop_rel(self, section_name, section_whole, to_pop):
+ size = int()
+ entsize = int()
+ dummy = {}
+ step = int()
+ if self.size == 64: step = 8
+ if self.size == 32: step = 4
+ for section in self.shhdr:
+ name = self.read_section_name(byte2int(section.sh_name))
+ if name == section_name:
+ self.so.seek(byte2int(section.sh_offset))
+ section_whole = self.so.read(byte2int(section.sh_size))
+ size = byte2int(section.sh_size)
+ entsize = byte2int(section.sh_entsize)
+ for i in range(0, int(size/entsize)):
+ dummy["r_offset"] = byte2int(section_whole[i*entsize:i*entsize+step])
+ dummy["r_info"] = byte2int(section_whole[i*entsize+step:i*entsize+(step*2)])
+ to_pop.append(dummy)
+ dummy = {}
+
+
class obj_loader():
def __init__(self, bytes):
self.memory = bytes()
@@ -1266,7 +1373,8 @@ def premain(argparser):
for i in md.disasm(bytes(elf.text_section), 0x0):
print(hex(i.address).ljust(7), i.mnemonic.ljust(7), i.op_str)
elif argparser.args.dynsecents: elf.dump_dyn_sec_ents(elf.dyn_section_ents)
- elif argparser.args.reladynents: elf.dump_dyn_sec_ents(elf.rela_dyn_ents)
+ elif argparser.args.reladyn: elf.dump_rela(elf.rela_dyn_ents)
+ elif argparser.args.relaplt: elf.dump_rela(elf.rela_plt_ents)
else: print("why even bother if you were not gonna type anythng decent in?")
def main():
diff --git a/bfd/test/makefile b/bfd/test/makefile
index 3512579..eb8576f 100644
--- a/bfd/test/makefile
+++ b/bfd/test/makefile
@@ -1,7 +1,8 @@
##################################VARS#################################
-CC=clang
-CC_FLAGS=-fpic -O0
+CC?=gcc
+CC=gcc
+CC_FLAGS=-fpic -O0 -g -v --debug
LD_FLAGS= -l bfd
TARGET=test
##################################RULES################################
generated by cgit v1.2.3 (git 2.25.1) at 2024-09-19 16:19:20 +0000