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| author | Roland McGrath <roland@redhat.com> | 2008-07-09 11:38:07 +0200 |
|---|---|---|
| committer | Roland McGrath <roland@redhat.com> | 2008-07-16 21:15:17 +0200 |
| commit | d4d67150165df8bf1cc05e532f6efca96f907cab (patch) | |
| tree | 390d5951231c2a1d97d6453d70c42da7af49eeae /include/asm-x86/thread_info.h | |
| parent | x86 ptrace: unify TIF_SINGLESTEP (diff) | |
| download | linux-d4d67150165df8bf1cc05e532f6efca96f907cab.tar.xz linux-d4d67150165df8bf1cc05e532f6efca96f907cab.zip | |
x86 ptrace: unify syscall tracing
This unifies and cleans up the syscall tracing code on i386 and x86_64.
Using a single function for entry and exit tracing on 32-bit made the
do_syscall_trace() into some terrible spaghetti. The logic is clear and
simple using separate syscall_trace_enter() and syscall_trace_leave()
functions as on 64-bit.
The unification adds PTRACE_SYSEMU and PTRACE_SYSEMU_SINGLESTEP support
on x86_64, for 32-bit ptrace() callers and for 64-bit ptrace() callers
tracing either 32-bit or 64-bit tasks. It behaves just like 32-bit.
Changing syscall_trace_enter() to return the syscall number shortens
all the assembly paths, while adding the SYSEMU feature in a simple way.
Signed-off-by: Roland McGrath <roland@redhat.com>
Diffstat (limited to 'include/asm-x86/thread_info.h')
| -rw-r--r-- | include/asm-x86/thread_info.h | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/include/asm-x86/thread_info.h b/include/asm-x86/thread_info.h index fb8d3cdf143e..b2702a1eeac1 100644 --- a/include/asm-x86/thread_info.h +++ b/include/asm-x86/thread_info.h @@ -75,9 +75,7 @@ struct thread_info { #define TIF_NEED_RESCHED 3 /* rescheduling necessary */ #define TIF_SINGLESTEP 4 /* reenable singlestep on user return*/ #define TIF_IRET 5 /* force IRET */ -#ifdef CONFIG_X86_32 #define TIF_SYSCALL_EMU 6 /* syscall emulation active */ -#endif #define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */ #define TIF_SECCOMP 8 /* secure computing */ #define TIF_MCE_NOTIFY 10 /* notify userspace of an MCE */ @@ -100,11 +98,7 @@ struct thread_info { #define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP) #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) #define _TIF_IRET (1 << TIF_IRET) -#ifdef CONFIG_X86_32 #define _TIF_SYSCALL_EMU (1 << TIF_SYSCALL_EMU) -#else -#define _TIF_SYSCALL_EMU 0 -#endif #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) #define _TIF_SECCOMP (1 << TIF_SECCOMP) #define _TIF_MCE_NOTIFY (1 << TIF_MCE_NOTIFY) @@ -121,11 +115,20 @@ struct thread_info { #define _TIF_DS_AREA_MSR (1 << TIF_DS_AREA_MSR) #define _TIF_BTS_TRACE_TS (1 << TIF_BTS_TRACE_TS) +/* work to do in syscall_trace_enter() */ +#define _TIF_WORK_SYSCALL_ENTRY \ + (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_EMU | \ + _TIF_SYSCALL_AUDIT | _TIF_SECCOMP) + +/* work to do in syscall_trace_leave() */ +#define _TIF_WORK_SYSCALL_EXIT \ + (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | _TIF_SINGLESTEP) + /* work to do on interrupt/exception return */ #define _TIF_WORK_MASK \ (0x0000FFFF & \ ~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT| \ - _TIF_SECCOMP|_TIF_SYSCALL_EMU)) + _TIF_SINGLESTEP|_TIF_SECCOMP|_TIF_SYSCALL_EMU)) /* work to do on any return to user space */ #define _TIF_ALLWORK_MASK (0x0000FFFF & ~_TIF_SECCOMP) |