| Summary: | Elf loader unable to load shared libraries(m68k/coldfire/m5485). | ||
|---|---|---|---|
| Product: | uClibc | Reporter: | Marius Groleo <groleo> |
| Component: | Shared Library Support | Assignee: | unassigned |
| Status: | RESOLVED FIXED | ||
| Severity: | critical | CC: | uclibc-cvs |
| Priority: | P5 | ||
| Version: | 0.9.30.1 | ||
| Target Milestone: | 0.9.31 | ||
| Hardware: | Other | ||
| OS: | Linux | ||
| Host: | i486-pc-linux-gnu | Target: | m68k-unknown-linux-uclibc |
| Build: | |||
| Attachments: |
ld.so generated output.
patch to add debugging _dl_dprintf calls in dl-elf.c |
||
Created attachment 175 [details]
patch to add debugging _dl_dprintf calls in dl-elf.c
This should be fixed on master. Please confirm. Fix confirmed. |
Created attachment 173 [details] ld.so generated output. Hi, I'm currently having trouble getting uClibc 0.9.30.1 to work on m68k/m5485 processor. It gets stuck when trying to load the first shared library, libgcc_s.so. In my attempt to debug the problem I added _dl_dprintf calls. All the debug lines are prefixed by filename and line. I tried to watch the trace of any parameter used in any _dl_mmap call. I identified these parameters as being(sorry for the long list): minvma, maxvma, libaddr, status, piclibc, mmap protection flags, tryaddr, piclib2map, ppnt->p_vaddr, dynamic_addr, lib_loadaddr. The first mapping is done here[ldso/ldso/dl-elf.c:468 libaddr=status'0x80016000'] requesting 0xe000 bytes. The second mapping is tried here[ldso/ldso/dl-elf.c:586 status'0xffffffff'] but fails. The reason why I *think* it fails is overlapping memory areas. Here, ldso/ldso/dl-elf.c:563 tryaddr'0x80023000' the address where a mapping is needed is 0x80023000, but if you add 0x80016000(the first mapping) with 0xE000 you get 0x80024000, which overlaps over the second solicited address(0x80023000). Attached you will find the debug.log and the _dl_dprintf patch for ldso/ldso/dl-elf.c. mariusn ~ > m68k-unknown-linux-uclibc-readelf -l ./libgcc_s.so.2 Elf file type is DYN (Shared object file) Entry point 0x20d4 There are 5 program headers, starting at offset 52 Program Headers: Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align LOAD 0x000000 0x00000000 0x00000000 0x0b108 0x0b108 R E 0x2000 LOAD 0x00b108 0x0000d108 0x0000d108 0x00264 0x003b8 RW 0x2000 DYNAMIC 0x00b11c 0x0000d11c 0x0000d11c 0x000d0 0x000d0 RW 0x4 GNU_EH_FRAME 0x00a59c 0x0000a59c 0x0000a59c 0x001cc 0x001cc R 0x4 GNU_STACK 0x000000 0x00000000 0x00000000 0x00000 0x00000 RWE 0x4 Section to Segment mapping: Segment Sections... 00 .hash .dynsym .dynstr .gnu.version .gnu.version_d .rela.dyn .rela.plt .init .plt .text .fini .rodata .eh_frame_hdr .eh_frame 01 .ctors .dtors .jcr .dynamic .got .data .bss 02 .dynamic 03 .eh_frame_hdr 04 Many thanks.