Hi Andreas,
FWIW: when stripping the new kernel, I get this warning:
BFD: st7CwWnM: warning: allocated section `.init_end' not in segment
This is actually your problem. The .init_end section is kind of special
because it only contains an ALIGN. What do you get from running
"readelf -l vmlinux"?
Current LD script:
schmitz@xplor:/org/kernel/linux2.6-m68k-git/linux-m68k$ readelf -l
vmlinux-newlds
Elf file type is EXEC (Executable file)
Entry point 0x2000
There are 2 program headers, starting at offset 52
Program Headers:
Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align
LOAD 0x000000 0x00000000 0x00000000 0x2d3240 0x2f0d14 RWE 0x2000
LOAD 0x2d5000 0x002f1000 0x002f1000 0x1aed0 0x1aed0 RWE 0x2000
Section to Segment mapping:
Segment Sections...
00 .text __ex_table .rodata __ksymtab __ksymtab_gpl __ksymtab_strings __param .data .bss
01 .init.text .init.data .m68k_fixup
Old (working) LD script:
schmitz@xplor:/org/kernel/linux2.6-m68k-git/linux-m68k$ readelf -l
vmlinux-oldlds
Elf file type is EXEC (Executable file)
Entry point 0x2000
There are 2 program headers, starting at offset 52
Program Headers:
Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align
LOAD 0x000000 0x00000000 0x00000000 0x2d0240 0x2edd14 RWE 0x2000
LOAD 0x2d2000 0x002ee000 0x002ee000 0x20000 0x20000 RWE 0x2000
Section to Segment mapping:
Segment Sections...
00 .text __ex_table .rodata __ksymtab __ksymtab_gpl __ksymtab_strings __param .data .bss
01 .init.text .init.data .init.setup .initcall.init .con_initcall.init .m68k_fixup .init.ramfs .data.init_task
Looks like the size of the BSS segment is not aligned in the broken case.
Putting this into the script:
--- arch/m68k/kernel/vmlinux-std.lds.org 2010-01-09 11:01:05.000000000
+1300
+++ arch/m68k/kernel/vmlinux-std.lds 2010-01-11 09:40:24.000000000 +1300
@@ -51,6 +51,10 @@
__init_end = .;
}
+ . = . + 0x1000;
+
+ . = ALIGN(8192);
+
_end = . ;
STABS_DEBUG
does place both __init_end and _end on separate aligned boundaries but leaves
the end of the actual BSS unaligned.
Geert's kernel has this readelf output:
schmitz@xplor:/org/m68k/aranym$ readelf -l
vmlinux-2.6.33-rc2-atari-00203-gdd8abd9
Elf file type is EXEC (Executable file)
Entry point 0x2000
There are 2 program headers, starting at offset 52
Program Headers:
Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align
LOAD 0x000000 0x00000000 0x00000000 0x2de440 0x2fb450 RWE 0x2000
LOAD 0x2e0000 0x002fc000 0x002fc000 0x1cf4c 0x1d000 RWE 0x2000
Section to Segment mapping:
Segment Sections...
00 .text __ex_table .rodata __ksymtab __ksymtab_gpl __ksymtab_strings __param .data .bss
01 .init.text .init.data .m68k_fixup .notes .init_end
The end of the BSS in memory is aligned here.
What is needed in the script to force this alignment? How do I place a null byte
right at __init_end ??
Thanks,
Michael
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