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    SubjectRe: Announce: kdb v4.4 is available for kernel 2.6.16
    On Sat, 1 Apr 2006, Dan Aloni wrote:
    >
    > Thanks for this new version, however I'm looking forward to see
    > kdb maintained also for the x86_64 architecture. Currently I have
    > got as far as forward-porting it to a level where it "works" except
    > for one annoying issue where setjmp/longjmp looks to be broken:
    >
    > Kernel configured with CONFIG_FRAME_POINTER=y,

    I've not tried latest kdb, but you should find the patch below still
    works (removing that unnecessary KDB_STATE_SET(LONGJMP) is probably
    irrelevant, just something I did on the way, and which does no harm).

    Hugh

    --- 2.6.13-kdb/arch/x86_64/kdb/kdbasupport.c 2005-09-09 12:34:43.000000000 +0100
    +++ fixed/arch/x86_64/kdb/kdbasupport.c 2005-08-30 15:10:20.000000000 +0100
    @@ -1035,14 +1004,15 @@ kdba_setjmp(kdb_jmp_buf *jb)
    {
    #if defined(CONFIG_FRAME_POINTER)
    __asm__("movq %rbx, (0*8)(%rdi);"
    - "movq %rbp, (1*8)(%rdi);"
    + "movq (%rsp), %rax;"
    + "movq %rax, (1*8)(%rdi);"
    "movq %r12, (2*8)(%rdi);"
    "movq %r13, (3*8)(%rdi);"
    "movq %r14, (4*8)(%rdi);"
    "movq %r15, (5*8)(%rdi);"
    "leaq 16(%rsp), %rdx;"
    "movq %rdx, (6*8)(%rdi);"
    - "movq (%rsp), %rax;"
    + "movq 8(%rsp), %rax;"
    "movq %rax, (7*8)(%rdi)");
    #else /* CONFIG_FRAME_POINTER */
    __asm__("movq %rbx, (0*8)(%rdi);"
    @@ -1056,7 +1026,6 @@ kdba_setjmp(kdb_jmp_buf *jb)
    "movq (%rsp), %rax;"
    "movq %rax, (7*8)(%rdi)");
    #endif /* CONFIG_FRAME_POINTER */
    - KDB_STATE_SET(LONGJMP);
    return 0;
    }

    -
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