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Hi,
Two problems
First one,
when building kernel and LKMs,
WARNING: vmlinux - Section mismatch: reference to
.init.text: from .plt after '' (at offset 0x8347e44)
WARNING: vmlinux - Section mismatch: reference to .init: from .plt after '' (at offset 0x8347e64) WARNING: vmlinux - Section mismatch: reference to .init.setup: from .plt after '' (at offset 0x8347ea4) WARNING: vmlinux - Section mismatch: reference to .init.text:nosmp from .plt after '' (at offset 0x8347f20) WARNING: vmlinux - Section mismatch: reference to .init.setup:__setup_nosmp from .plt after '' (at offset 0x8347f28) WARNING: vmlinux - Section mismatch: reference to .init.text:maxcpus from .plt after '' (at offset 0x8347f2c) ...
...
So when gdb loads LKM symbols, it seems .init.text and
.exit.text sections overlapped with .text section.
Second one,
when run uml compiled with "-g" and without
"-O2",
uml crashed
VFS: Mounted root (ext2 filesystem).
Stub registers - 0 - 0 1 - 0 2 - 0 3 - 0 4 - 0 5 - bffffd1c 6 - e 7 - 7b 8 - 7b 9 - 0 10 - 0 11 - ffffffff 12 - bfdb8f9a 13 - 73 14 - 10282 15 - bffffd04 16 - 7b Kernel panic - not syncing: get_skas_faultinfo : failed to wait for SIGUSR1/SIGTRAP, pid = 7760, n = 7760, errno = 0, status = 0xb7f EIP: 0073:[<400007b0>] CPU: 0 Not tainted ESP: 007b:bf9fa530 EFLAGS: 00010246 Not tainted EAX: 00000000 EBX: 00000000 ECX: 00000000 EDX: 00000000 ESI: 00000000 EDI: 00000000 EBP: 00000000 DS: 007b ES: 007b 088a7b18: [<08082abb>] show_regs+0x123/0x125 088a7b34: [<08066441>] panic_exit+0x3e/0x60 088a7b4c: [<080a5bed>] notifier_call_chain+0x3c/0x64 088a7b6c: [<080a5ca9>] atomic_notifier_call_chain+0x1f/0x27 088a7b84: [<0808cf37>] panic+0x7d/0x126 088a7ba8: [<0807c293>] wait_stub_done+0x1e4/0x1e6 088a7c28: [<0807c321>] get_skas_faultinfo+0x8c/0xaa 088a7c44: [<0807d646>] user_signal+0x57/0x81 088a7c60: [<0807cae7>] userspace+0x211/0x2c2 088a7cc8: [<08066deb>] new_thread_handler+0x1aa/0x1b8 088a7d20: [<006c2a48>] 0x6c2a48 |
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