1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
|
#!/usr/bin/env python
import gdb
try:
from elftools.elf.elffile import ELFFile
from elftools.common.exceptions import ELFError
except ImportError:
gdb.write("The barebox helper requires pyelftools\n", gdb.STDERR)
exit(1)
class BBSymbols(gdb.Command):
def __init__(self):
super(BBSymbols, self).__init__("bb-load-symbols", gdb.COMMAND_FILES,
gdb.COMPLETE_FILENAME)
def invoke(self, argument, from_tty):
path = argument
f = open(path, 'rb')
try:
elf = ELFFile(f)
except ELFError:
gdb.write("Selected file is not an ELF file\n", gdb.STDERR)
return
section = elf.get_section_by_name(".symtab")
if section is None:
gdb.write("Section .symtab not found\n", gdb.STDERR)
return
symbol = section.get_symbol_by_name("pbl_barebox_break")
if not symbol:
gdb.write("Symbol pbl_barebox_break in section {} in file {} not found\n"
.format(section.name, self.path), gdb.STDERR)
return
symbol = symbol[0]
pc = gdb.parse_and_eval("$pc")
symbol_address = int(symbol.entry.st_value)
address = int(pc) - symbol_address + 1
gdb.execute("symbol-file")
gdb.execute("add-symbol-file {} {}".format(path, address))
BBSymbols()
class BBSkip(gdb.Command):
def __init__(self):
super(BBSkip, self).__init__("bb-skip-break", gdb.COMMAND_BREAKPOINTS)
def invoke(self, arg, from_tty):
pc = gdb.parse_and_eval("$pc")
nop_address = int(pc) + 2
gdb.execute("jump *{}".format(nop_address))
BBSkip()
|
