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elf_mem_map: add declaration position in --map

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Yuri D'Elia 2021-06-05 20:36:19 +02:00 committed by DRracer
parent d1720cba51
commit 7bdee552ce
1 changed files with 20 additions and 7 deletions
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27
tools/elf_mem_map
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@ -10,7 +10,7 @@ EEPROM_OFFSET = 0x810000
FILL_BYTE = b'\0'
Entry = namedtuple('Entry', ['name', 'loc', 'size'])
Entry = namedtuple('Entry', ['name', 'loc', 'size', 'declpos'])
Member = namedtuple('Member', ['name', 'off', 'size'])
@ -160,6 +160,8 @@ def get_elf_globals(path, expand_structs, struct_gaps=True):
grefs = []
for CU in dwarfinfo.iter_CUs():
file_entries = dwarfinfo.line_program_for_CU(CU).header["file_entry"]
for DIE in CU.iter_DIEs():
# handle only variable types
if DIE.tag != 'DW_TAG_variable':
@ -196,6 +198,16 @@ def get_elf_globals(path, expand_structs, struct_gaps=True):
continue
byte_size = size[1]
# location of main definition
declpos = ''
if 'DW_AT_decl_file' in DIE.attributes and \
'DW_AT_decl_line' in DIE.attributes:
line = DIE.attributes['DW_AT_decl_line'].value
fname = DIE.attributes['DW_AT_decl_file'].value
if fname and fname - 1 < len(file_entries):
fname = file_entries[fname-1].name.decode('ascii')
declpos = '{}:{}'.format(fname, line)
# fetch array dimensions (if known)
array_dim = get_array_dims(DIE)
@ -208,17 +220,18 @@ def get_elf_globals(path, expand_structs, struct_gaps=True):
else:
for member in members:
grefs.append(Entry(entry.name + '.' + member.name,
entry.loc + member.off, member.size))
entry.loc + member.off, member.size,
entry.declpos))
if byte_size == 1 and len(array_dim) > 1:
# likely string, remove one dimension
byte_size *= array_dim.pop()
if len(array_dim) == 0 or (len(array_dim) == 1 and array_dim[0] == 1):
# plain entry
expand_members(Entry(name, loc, byte_size), members)
expand_members(Entry(name, loc, byte_size, declpos), members)
elif len(array_dim) == 1 and byte_size == 1:
# likely string, avoid expansion
grefs.append(Entry(name + '[]', loc, array_dim[0]))
grefs.append(Entry(name + '[]', loc, array_dim[0], declpos))
else:
# expand array entries
array_pos = loc
@ -229,7 +242,7 @@ def get_elf_globals(path, expand_structs, struct_gaps=True):
for d in range(len(array_dim)):
sfx += '[{}]'.format(str(array_loc[d]).rjust(len(str(array_dim[d]-1)), '0'))
expand_members(Entry(name + sfx, array_pos, byte_size), members)
expand_members(Entry(name + sfx, array_pos, byte_size, declpos), members)
# advance
if array_inc(array_loc, array_dim):
@ -316,9 +329,9 @@ def annotate_refs(grefs, addr, data, width, gaps=True, overlaps=True):
def print_map(grefs):
print('OFFSET\tSIZE\tNAME')
print('OFFSET\tSIZE\tNAME\tDECLPOS')
for entry in grefs:
print('{:x}\t{}\t{}'.format(entry.loc, entry.size, entry.name))
print('{:x}\t{}\t{}\t{}'.format(entry.loc, entry.size, entry.name, entry.declpos))
def main():