[LV] Status of the toolchain build scripts?

[Mikkel Lauritsen]

Jan-Benedict Glaw <jbglaw at lug-owl.de> wrote:

> I'm curious about it... Maybe give it a run with libefence
> LD_PRELOAD'ed?

Sure thing. That more or less sorted things out - the exact code writing
beyond the allocated area is clear (line 1083 in gas/app.c), but how it
got there I don't quite follow. I have included the backtrace below, and
as far as I can see it would require that the character 'e' was considered
a separator between parallel insns and screwing up the value of to just
before that.

I'll take a further look at it and see what I can come up with.

Best regards
  Mikkel

--- backtrace

(gdb) bt full
#0  0x08049999 in do_scrub_chars (get=0x805b460 <scrub_from_string>,
    tostart=0xb7d55f54 "\t.linefile 663\"arch/vax/kernel/signal.c\"1\n
mtpr $31,
$18\n\t.linefile 0\"\"2\n\t.linefile
78\"include/asm/thread_info.h\"1\n mfpr $0,%r0\n\t.linefile
0\"\"2\n\t.linefile
78\"include/asm/thr", tolen=172)
    at
/home/mikkel/linux-vax/build/build-20070617-191810-UTC-vax-linux-uclibc/s
rc/binutils/gas/app.c:1083
        to = <value optimized out>
        toend = 0xb7d56000 ""
        from = 0x0
        fromend = 0x80d6e2c "revious\n\t.linefile 0\"\"2\nrevious\n# 0
\"\" 2\nh
/vax/kernel/signal.c\"1\n 1:movb %r5,98(%r10)\n2:\n.section
fixup,\"ax\"\n3:movl $-14,%r5\n jmp 2b\n.previous \n.section
__ex_table,\"a\"\n
 .align 2\n .long 1b,3b\n.previou"...
        fromlen = <value optimized out>
        ch = 101
        ch2 = <value optimized out>
        quotechar = 34 '"'
#1  0x0805ee3b in read_a_source_file (name=0xbfe768a1
"/home/mikkel/signal4.asm"
)
    at
/home/mikkel/linux-vax/build/build-20070617-191810-UTC-vax-linux-uclibc/s
rc/binutils/gas/read.c:1071
        space = 172
        size = <value optimized out>
        c = <value optimized out>
        s = 0xb7fbeb37 "# 663 \"arch/vax/kernel/signal.c\" 1\n\tmtpr
$31,$18\n#
0 \"\" 2\n# 78 \"include/asm/thread_info.h\" 1\n\tmfpr $0,%r0\n#
0 \"\" 2\n# 78 \"include/asm/thread_info.h\" 1\n\tmfpr $0,%r0\n# 0 \"\"
2\n#NO_A
PP\n\tbicl2 $8191,%r0\n\tmo"...
        temp = <value optimized out>
        pop = <value optimized out>
        last_eol = 0x0
#2  0x0804aaf6 in perform_an_assembly_pass (argc=<value optimized out>,
argv=0xb
7ee6fec)
    at
/home/mikkel/linux-vax/build/build-20070617-191810-UTC-vax-linux-uclibc/s
rc/binutils/gas/as.c:1026
        saw_a_file = 1
        applicable = <value optimized out>
#3  0x0804b868 in main (argc=Cannot access memory at address 0x65
) at
/home/mikkel/linux-vax/build/build-20070617-191810-UTC-vax-linux-uclibc/src
/binutils/gas/as.c:1141
        keep_it = <value optimized out>
        __PRETTY_FUNCTION__ = "main"

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