lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

[PATCH] Uml support: reorganize PTRACE_SYSEMU support

Browse Source 
With this patch, we change the way we handle switching from PTRACE_SYSEMU to
PTRACE_{SINGLESTEP,SYSCALL}, to free TIF_SYSCALL_EMU from double use as a
preparation for PTRACE_SYSEMU_SINGLESTEP extension, without changing the
behavior of the host kernel.

Signed-off-by: Bodo Stroesser <bstroesser@fujitsu-siemens.com>
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Bodo Stroesser
2005-09-03 15:57:19 -07:00
committed by Linus Torvalds
parent ed75e8d580
commit c8c86cecd1
2 changed files with 21 additions and 30 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
arch/i386/kernel/entry.S
View File

@@ -339,12 +339,18 @@ syscall_trace_entry:
xorl %edx,%edx
call do_syscall_trace
cmpl $0, %eax
jne syscall_exit # ret != 0 -> running under PTRACE_SYSEMU,
jne syscall_skip # ret != 0 -> running under PTRACE_SYSEMU,
# so must skip actual syscall
movl ORIG_EAX(%esp), %eax
cmpl $(nr_syscalls), %eax
jnae syscall_call
jmp syscall_exit
syscall_skip:
cli # make sure we don't miss an interrupt
# setting need_resched or sigpending
# between sampling and the iret
movl TI_flags(%ebp), %ecx
jmp work_pending
# perform syscall exit tracing
ALIGN