* Frank Ch. Eigler (fche@xxxxxxxxxx) wrote: > > Perhaps you could post excerpts of "objdump -dr <file.o>", to see the > disassembly / relocations in question. > > - FChE Hi Frank, (this message follow up on http://listserv.shafik.org/pipermail/ltt-dev/2007-February/002212.html) compudj@amd64:~/obj/sparc$ PATH=/opt/crosstool/gcc-4.1.1-glibc-2.3.6/sparc-unknown-linux-gnu/bin sparc-unknown-linux-gnu-objdump -dr .tmp_kallsyms3.o .tmp_kallsyms3.o: file format elf32-sparc (that's all) By looking at what follows in more depth, it looks like the symbols I keep are relative to the beginning of the _text section and sparc would have a limit regarding this (maximum offset ? number of offsets relative to a symbol ?) Any insights are welcome, Mathieu link error : opt/crosstool/gcc-4.1.1-glibc-2.3.6/sparc-unknown-linux-gnu/bin/sparc-unknown-linux-gnu-ld -m elf32_sparc -T arch/sparc/kernel/vmlinux.lds arch/sparc/kernel/head.o arch/sparc/kernel/init_task.o init/built-in.o --start-group usr/built-in.o arch/sparc/kernel/built-in.o arch/sparc/mm/built-in.o arch/sparc/math-emu/built-in.o kernel/built-in.o mm/built-in.o fs/built-in.o ipc/built-in.o security/built-in.o crypto/built-in.o block/built-in.o lib/lib.a arch/sparc/prom/lib.a arch/sparc/lib/lib.a lib/built-in.o arch/sparc/prom/built-in.o arch/sparc/lib/built-in.o drivers/built-in.o sound/built-in.o net/built-in.o --end-group .tmp_kallsyms3.o arch/sparc/boot/btfix.o -o arch/sparc/boot/image .tmp_kallsyms3.o: In function `kallsyms_addresses': .tmp_kallsyms3.S:(.rodata+0x0): relocation truncated to fit: R_SPARC_32 against symbol `_text' defined in .text section in arch/sparc/boot/image .tmp_kallsyms3.S:(.rodata+0x8): relocation truncated to fit: R_SPARC_32 against symbol `_text' defined in .text section in arch/sparc/boot/image ... .tmp_kallsyms3.S:(.rodata+0x2c): additional relocation overflows omitted from the output make[2]: *** [arch/sparc/boot/image] Error 1 arch/sparc/kernel/vmlinux.lds ... OUTPUT_FORMAT("elf32-sparc", "elf32-sparc", "elf32-sparc") OUTPUT_ARCH(sparc) ENTRY(_start) jiffies = jiffies_64 + 4; SECTIONS { . = 0x10000 + SIZEOF_HEADERS; .text 0xf0004000 : { _text = .; *(.text) . = ALIGN(8); __sched_text_start = .; *(.sched.text) __sched_text_end = .; . = ALIGN(8); __lock_text_start = .; *(.spinlock.text) __lock_text_end = .; *(.gnu.warning) } =0 _etext = .; ... A look at .tmp_kallsyms3.S, symbol kallsyms_addresses which seems to cause linking error on sparc : #include <asm/types.h> #if BITS_PER_LONG == 64 #define PTR .quad #define ALGN .align 8 #else #define PTR .long #define ALGN .align 4 #endif .section .rodata, "a" .globl kallsyms_addresses ALGN kallsyms_addresses: PTR _text - 0xeffd7000 PTR 0x2d000 PTR _text - 0xeffd6fb8 PTR _text - 0xeffd6f50 PTR _text - 0xeffd6ed0 PTR _text - 0xeffd6eac PTR _text - 0xeffd6b84 PTR _text - 0xeffd6860 PTR _text - 0xeffd6830 PTR _text - 0xeffd6814 PTR _text - 0xeffd6794 PTR _text - 0xeffd6788 PTR _text - 0xeffd6778 PTR _text - 0xeffd6764 PTR _text - 0xeffd673c PTR _text - 0xeffd6714 PTR _text - 0xeffd66e4 PTR _text - 0xeffd66b4 PTR _text - 0xeffd66ac PTR _text - 0xeffd6698 PTR _text - 0xeffd6674 PTR _text - 0xeffd6650 PTR _text - 0xeffd63dc PTR _text - 0xeffd637c PTR _text - 0xeffd6304 PTR _text - 0xeffd6060 PTR _text - 0xeffd6034 PTR _text - 0xeffd6008 PTR _text - 0xeffd5ff8 ..... PTR _text - 0xeffbc7a0 PTR _text - 0xeffbc730 PTR 0x47930 PTR _text + 0 PTR _text + 0 PTR _text + 0 PTR _text + 0 PTR _text + 0 PTR _text + 0 PTR _text + 0 PTR _text + 0x10 PTR _text + 0x20 PTR _text + 0x30 PTR _text + 0x40 PTR _text + 0x50 PTR _text + 0x60 PTR _text + 0x70 PTR _text + 0x80 PTR _text + 0x90 PTR _text + 0xa0 PTR _text + 0xb0 PTR _text + 0xc0 PTR _text + 0x110 PTR _text + 0x120 PTR _text + 0x130 PTR _text + 0x140 PTR _text + 0x150 .... PTR _text + 0x1b67c4 PTR _text + 0x1b67d8 PTR 0xf01ba890 And by the way, I also add my own section to include/asm-generic/vmlinux.lds.h in RODATA : adds at line 124, kernel 2.6.20 : /* Kernel markers : pointers */ \ .markers : AT(ADDR(.markers) - LOAD_OFFSET) { \ VMLINUX_SYMBOL(__start___markers) = .; \ *(.markers) \ VMLINUX_SYMBOL(__stop___markers) = .; \ } \ -- Mathieu Desnoyers Computer Engineering Graduate Student, École Polytechnique de Montréal OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68 - To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
