On Fri, Jan 16, 2015 at 8:12 PM, Matthew Fortune
<Matthew.Fortune@xxxxxxxxxx> wrote:
>> On Fri, Jan 16, 2015 at 6:59 PM, Manuel Lauss <manuel.lauss@xxxxxxxxx>
>> wrote:
>> > Hi Paul,
>> >
>> > Your patch commit 90cee759f08a6b7a8daab9977d3e163ebbcac220
>> > ("MIPS: ELF: Set FP mode according to .MIPS.abiflags") completely
>> > breaks my pure soft-float o32 userland:
>> >
>> > [...]
>> > Freeing unused kernel memory: 244K (80993000 - 809d0000) Failed to
>> > execute /usr/lib/systemd/systemd (error -84). Attempting defaults...
>> > Starting init: /sbin/init exists but couldn't execute it (error -84)
>> > sh: cannot set terminal process group (-1): Inappropriate ioctl for
>> > device
>> > sh: no job control in this shell
>> > sh-4.3# ls
>> > sh: /bin/ls: Accessing a corrupted shared library sh-4.3#
>> >
>> > I've recently rebuilt bash, ncurses, readline and glibc-2.20 (with
>> > binutils 2.25+) to track down another userland issue, so that may
>> > explain why at least sh is able to run.
>>
>> Although ls and all its dependencies have the following soft-float abi
>> tag:
>> Displaying notes found at file offset 0x00000164 with length 0x00000020:
>> Owner Data size Description
>> GNU 0x00000010 NT_GNU_ABI_TAG (ABI version tag)
>> OS: Linux, ABI: 2.6.32
>> Attribute Section: gnu
>> File Attributes
>> Tag_GNU_MIPS_ABI_FP: Soft float
>
> Can you provide the output of readelf -hl for 'ls', 'init' and whatever is
> listed as the interpreter for those executables in the header output shown
> like:
>
> INTERP 0x0000000000000238 0x0000000000400238 0x0000000000400238
> 0x000000000000001c 0x000000000000001c R 1
> [Requesting program interpreter: /lib64/ld-linux-x86-64.so.2]
Here's the output, identical on all tested binaries and libs:
# readelf -hl /bin/ls
ELF Header:
Magic: 7f 45 4c 46 01 01 01 00 00 00 00 00 00 00 00 00
Class: ELF32
Data: 2's complement, little endian
Version: 1 (current)
OS/ABI: UNIX - System V
ABI Version: 0
Type: EXEC (Executable file)
Machine: MIPS R3000
Version: 0x1
Entry point address: 0x403f20
Start of program headers: 52 (bytes into file)
Start of section headers: 131784 (bytes into file)
Flags: 0x50001005, noreorder, cpic, o32, mips32
Size of this header: 52 (bytes)
Size of program headers: 32 (bytes)
Number of program headers: 9
Size of section headers: 40 (bytes)
Number of section headers: 33
Section header string table index: 32
Program Headers:
Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align
PHDR 0x000034 0x00400034 0x00400034 0x00120 0x00120 R E 0x4
INTERP 0x000154 0x00400154 0x00400154 0x0000d 0x0000d R 0x1
[Requesting program interpreter: /lib/ld.so.1]
REGINFO 0x000184 0x00400184 0x00400184 0x00018 0x00018 R 0x4
LOAD 0x000000 0x00400000 0x00400000 0x1d290 0x1d290 R E 0x10000
LOAD 0x01e000 0x0042e000 0x0042e000 0x00378 0x00fb0 RW 0x10000
DYNAMIC 0x00019c 0x0040019c 0x0040019c 0x00140 0x00140 R 0x4
NOTE 0x000164 0x00400164 0x00400164 0x00020 0x00020 R 0x4
GNU_EH_FRAME 0x01cb30 0x0041cb30 0x0041cb30 0x0002c 0x0002c R 0x4
NULL 0x000000 0x00000000 0x00000000 0x00000 0x00000 0x4
Section to Segment mapping:
Segment Sections...
00
01 .interp
02 .reginfo
03 .interp .note.ABI-tag .reginfo .dynamic .hash .dynsym
.dynstr .gnu.version .gnu.version_r .rel.dyn .rel.plt .init .text
.MIPS.stubs .fini .rodata .eh_frame_hdr .eh_frame .plt
04 .init_array .fini_array .jcr .got.plt .data .rld_map .got .sdata .bss
05 .dynamic
06 .note.ABI-tag
07 .eh_frame_hdr
08
# readelf -hl /usr/lib/systemd/systemd
ELF Header:
Magic: 7f 45 4c 46 01 01 01 00 00 00 00 00 00 00 00 00
Class: ELF32
Data: 2's complement, little endian
Version: 1 (current)
OS/ABI: UNIX - System V
ABI Version: 0
Type: DYN (Shared object file)
Machine: MIPS R3000
Version: 0x1
Entry point address: 0x165a0
Start of program headers: 52 (bytes into file)
Start of section headers: 1574780 (bytes into file)
Flags: 0x50001005, noreorder, cpic, o32, mips32
Size of this header: 52 (bytes)
Size of program headers: 32 (bytes)
Number of program headers: 10
Size of section headers: 40 (bytes)
Number of section headers: 32
Section header string table index: 31
Program Headers:
Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align
PHDR 0x000034 0x00000034 0x00000034 0x00140 0x00140 R 0x4
INTERP 0x000174 0x00000174 0x00000174 0x0000d 0x0000d R 0x1
[Requesting program interpreter: /lib/ld.so.1]
LOAD 0x000000 0x00000000 0x00000000 0x148bf8 0x148bf8 R E 0x10000
LOAD 0x14ef68 0x0015ef68 0x0015ef68 0x1a788 0x1b06c RW 0x10000
NULL 0x000000 0x00000000 0x00000000 0x00000 0x00000 0
DYNAMIC 0x15feb0 0x0016feb0 0x0016feb0 0x00150 0x00150 RW 0x4
NOTE 0x000184 0x00000184 0x00000184 0x00020 0x00020 R 0x4
GNU_EH_FRAME 0x148bd4 0x00148bd4 0x00148bd4 0x00024 0x00024 R 0x4
TLS 0x14ef68 0x0015ef68 0x0015ef68 0x00008 0x00061 R 0x8
GNU_RELRO 0x14ef68 0x0015ef68 0x0015ef68 0x11098 0x11098 RW 0x8
