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From c3476c3207efef576a185a047e6596b3b0cbcb42 Mon Sep 17 00:00:00 2001
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From: Tzu-ping Chung <uranusjr@gmail.com>
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Date: Wed, 20 Apr 2022 10:00:07 +0800
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Subject: [PATCH 1/2] Correctly parse ELF for musllinux on Big Endian
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---
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packaging/_musllinux.py | 8 +++++---
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1 file changed, 5 insertions(+), 3 deletions(-)
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diff --git a/packaging/_musllinux.py b/packaging/_musllinux.py
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index 8ac3059b..d5d3e044 100644
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--- a/packaging/_musllinux.py
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+++ b/packaging/_musllinux.py
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@@ -39,9 +39,11 @@ def _parse_ld_musl_from_elf(f: IO[bytes]) -> Optional[str]:
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# p_fmt: Format for section header.
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# p_idx: Indexes to find p_type, p_offset, and p_filesz.
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e_fmt, p_fmt, p_idx = {
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- 1: ("IIIIHHH", "IIIIIIII", (0, 1, 4)), # 32-bit.
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- 2: ("QQQIHHH", "IIQQQQQQ", (0, 2, 5)), # 64-bit.
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- }[ident[4]]
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+ (1, 1): ("
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+ (1, 2): (">IIIIHHH", ">IIIIIIII", (0, 1, 4)), # 32-bit MSB.
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+ (2, 1): ("
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+ (2, 2): (">QQQIHHH", ">IIQQQQQQ", (0, 2, 5)), # 64-bit MSB.
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+ }[(ident[4], ident[5])]
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except KeyError:
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return None
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else:
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From a339dd3374b334a1a999481f3014f68a7389dacc Mon Sep 17 00:00:00 2001
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From: Tzu-ping Chung <uranusjr@gmail.com>
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Date: Sun, 29 May 2022 11:55:30 +0800
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Subject: [PATCH 2/2] Always use LSB to parse binary in tests
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---
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tests/test_musllinux.py | 9 +++++----
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1 file changed, 5 insertions(+), 4 deletions(-)
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diff --git a/tests/test_musllinux.py b/tests/test_musllinux.py
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index d2c87ca1..2623bdbc 100644
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--- a/tests/test_musllinux.py
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+++ b/tests/test_musllinux.py
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@@ -101,14 +101,15 @@ def test_parse_ld_musl_from_elf_no_interpreter_section():
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with BIN_MUSL_X86_64.open("rb") as f:
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data = f.read()
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- # Change all sections to *not* PT_INTERP.
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- unpacked = struct.unpack("16BHHIQQQIHHH", data[:58])
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+ # Change all sections to *not* PT_INTERP. We are explicitly using LSB rules
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+ # because the binaries are in LSB.
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+ unpacked = struct.unpack("<16BHHIQQQIHHH", data[:58])
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*_, e_phoff, _, _, _, e_phentsize, e_phnum = unpacked
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for i in range(e_phnum + 1):
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sb = e_phoff + e_phentsize * i
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se = sb + 56
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- section = struct.unpack("IIQQQQQQ", data[sb:se])
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- data = data[:sb] + struct.pack("IIQQQQQQ", 0, *section[1:]) + data[se:]
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+ section = struct.unpack("
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+ data = data[:sb] + struct.pack("
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assert _parse_ld_musl_from_elf(io.BytesIO(data)) is None
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