On Sat, Apr 01, 2006 at 08:04:30PM +0300, Dan Aloni wrote:
> > Current versions are :-
> >
> > kdb-v4.4-2.6.16-common-1.bz2
> > kdb-v4.4-2.6.16-i386-1.bz2
> > kdb-v4.4-2.6.16-ia64-1.bz2
>
> 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:
Problem is due to the mixed C/asm implementation of setjmp/longjmp.
Replace that with one written entirely in assemply and it will work.
Here's mine:
/* setjmp / longjmp for the kernel.
* Inspired by the glibc version.
*/
.text
.globl __kernel_setjmp
.p2align 4
__kernel_setjmp:
movq %rbx,0x0(%rdi)
movq %rbp,0x8(%rdi)
movq %r12,0x10(%rdi)
movq %r13,0x18(%rdi)
movq %r14,0x20(%rdi)
movq %r15,0x28(%rdi)
leaq 0x8(%rsp),%rdx
movq %rdx,0x30(%rdi)
movq (%rsp),%rax
movq %rax,0x38(%rdi)
xorq %rax,%rax
ret
.globl __kernel_longjmp
__kernel_longjmp:
movq 0x0(%rdi),%rbx
movq 0x8(%rdi),%rbp
movq 0x10(%rdi),%r12
movq 0x18(%rdi),%r13
movq 0x20(%rdi),%r14
movq 0x28(%rdi),%r15
test %esi,%esi
mov $1,%eax
cmove %eax,%esi
mov %esi,%eax
movq 0x38(%rdi),%rdx
movq 0x30(%rdi),%rsp
jmpq *%rdx
-
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