Overlapping program headers/segments
Max Larsson
max.larsson@gmx.de
Sun Sep 24 18:32:04 GMT 2023
Hi everyone,
I'm about to (re-)port binutils (mainly the the linker ld) to the amigaos ppc architecture using
elf format.
Now I've stumble over a problem, where I need to help, how to fix it.
What I have done so far, is to put the .rodata section in its own segment via defining a target
specific method for 'elf_backend_modify_segment'. How to do it, I copied/looked/adapted from
elfxx-mips.c:_bfd_mips_elf_modify_segment_map That works as expected.
But The result is that the program headers overlap. Like this:
Program Headers:
Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align
LOAD 0x000000 0x10000000 0x10000000 0x02034 0x02034 R E 0x10000
LOAD 0x020000 0x10010000 0x10010000 0x000f0 0x000f0 RW 0x10000
DYNAMIC 0x020028 0x10010028 0x10010028 0x000b8 0x000b8 RW 0x4
LOAD 0x012000 0x10002000 0x10002000 0x00031 0x00031 R 0x10000
Section to Segment mapping:
Segment Sections...
00 .hash .dynsym .dynstr .rela.dyn .rela.got2 .rela.plt .text .plt
01 .init_array .fini_array .got2 .dynamic .got
02 .dynamic
03 .rodata
You see, if you take the Virt-/PhysAddr and add the MemSize from the first
program header the result is 0x10002034, which is greater than the Virt-/PhysAddr
of the last program header 0x10002000.
So my question why do I get such a result, and how can I avoid it?
best regards
Max Larsson
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