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kernel: fix 64-bit for kobject generation

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We need a format code for struct packing that fits in
a pointer value, "I" is fixed at 32-bit.

The conversion of string to pointer value now prints
8 bytes. This works for 32-bit since the leading
4 digits are always zero.

The replaced length check uses sizeof(void *) and not 4.

Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
This commit is contained in:
Andrew Boie 2019-11-18 17:06:13 -08:00 • committed by Andrew Boie
commit f290ab595c
3 changed files with 33 additions and 9 deletions
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20
scripts/elf_helper.py
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@ -353,6 +353,19 @@ def analyze_typedef(die):
type_env[die.offset] = type_env[type_offset]
def unpack_pointer(elf, data, offset):
endian_code = "<" if elf.little_endian else ">"
if elf.elfclass == 32:
size_code = "I"
size = 4
else:
size_code = "Q"
size = 8
return struct.unpack(endian_code + size_code,
data[offset:offset + size])[0]
def addr_deref(elf, addr):
for section in elf.iter_sections():
start = section['sh_addr']
@ -361,14 +374,15 @@ def addr_deref(elf, addr):
if start <= addr < end:
data = section.data()
offset = addr - start
return struct.unpack("<I" if elf.little_endian else ">I",
data[offset:offset + 4])[0]
return unpack_pointer(elf, data, offset)
return 0
def device_get_api_addr(elf, addr):
return addr_deref(elf, addr + 4)
# Read device->driver API
offset = 4 if elf.elfclass == 32 else 8
return addr_deref(elf, addr + offset)
def get_filename_lineno(die):