Re: [patch] really-ptrace-single-step

[Fabiano Ramos]

Still not getting the desired result.
Which kernel is the patch based on?

On Tue, 2004-05-11 at 14:12, Davide Libenzi wrote:
> This patch lets a ptrace process on x86 to "see" the instruction 
> following the INT #80h op.
> 
> 
> 
> - Davide
> 
> 
> arch/i386/kernel/entry.S       |    2 +-
> include/asm-i386/thread_info.h |    2 +-
> 2 files changed, 2 insertions(+), 2 deletions(-)
> 
> 
> 
> 
> Index: arch/i386/kernel/entry.S
> ===================================================================
> RCS file: /usr/src/bkcvs/linux-2.5/arch/i386/kernel/entry.S,v
> retrieving revision 1.83
> diff -u -r1.83 entry.S
> --- arch/i386/kernel/entry.S	12 Apr 2004 20:29:12 -0000	1.83
> +++ arch/i386/kernel/entry.S	11 May 2004 06:35:29 -0000
> @@ -354,7 +354,7 @@
>  	# perform syscall exit tracing
>  	ALIGN
>  syscall_exit_work:
> -	testb $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT), %cl
> +	testb $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP), %cl
>  	jz work_pending
>  	sti				# could let do_syscall_trace() call
>  					# schedule() instead
> Index: include/asm-i386/thread_info.h
> ===================================================================
> RCS file: /usr/src/bkcvs/linux-2.5/include/asm-i386/thread_info.h,v
> retrieving revision 1.19
> diff -u -r1.19 thread_info.h
> --- include/asm-i386/thread_info.h	12 Apr 2004 20:29:12 -0000	1.19
> +++ include/asm-i386/thread_info.h	11 May 2004 06:34:47 -0000
> @@ -165,7 +165,7 @@
>  
>  /* work to do on interrupt/exception return */
>  #define _TIF_WORK_MASK \
> -  (0x0000FFFF & ~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT))
> +  (0x0000FFFF & ~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP))
>  #define _TIF_ALLWORK_MASK	0x0000FFFF	/* work to do on any return to u-space */
>  
>  /*
> -
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