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| author | Andi Kleen | 2006-01-11 22:44:06 +0100 |
|---|---|---|
| committer | Linus Torvalds | 2006-01-12 04:04:53 +0100 |
| commit | bf2fcc6fdfe4f4e92bb74f062c0a1be189f3a561 (patch) | |
| tree | 0bcc33f681c7e8ce6596c9323d4a1026ede84994 /arch | |
| parent | [PATCH] x86_64: Implement compat code for sg driver SG_GET_REQUEST_TABLE ioctl (diff) | |
| download | kernel-qcow2-linux-bf2fcc6fdfe4f4e92bb74f062c0a1be189f3a561.tar.gz kernel-qcow2-linux-bf2fcc6fdfe4f4e92bb74f062c0a1be189f3a561.tar.xz kernel-qcow2-linux-bf2fcc6fdfe4f4e92bb74f062c0a1be189f3a561.zip | |
[PATCH] x86_64: Implement is_compat_task the right way
By setting a flag during a 32bit system call only
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86_64/ia32/ia32entry.S | 5 | ||||
| -rw-r--r-- | arch/x86_64/kernel/asm-offsets.c | 1 | ||||
| -rw-r--r-- | arch/x86_64/kernel/entry.S | 1 |
3 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86_64/ia32/ia32entry.S b/arch/x86_64/ia32/ia32entry.S index 8172e61c3f6f..58f5bfb52c63 100644 --- a/arch/x86_64/ia32/ia32entry.S +++ b/arch/x86_64/ia32/ia32entry.S @@ -104,6 +104,7 @@ ENTRY(ia32_sysenter_target) .quad 1b,ia32_badarg .previous GET_THREAD_INFO(%r10) + orl $TS_COMPAT,threadinfo_status(%r10) testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP),threadinfo_flags(%r10) CFI_REMEMBER_STATE jnz sysenter_tracesys @@ -117,6 +118,7 @@ sysenter_do_call: cli testl $_TIF_ALLWORK_MASK,threadinfo_flags(%r10) jnz int_ret_from_sys_call + andl $~TS_COMPAT,threadinfo_status(%r10) /* clear IF, that popfq doesn't enable interrupts early */ andl $~0x200,EFLAGS-R11(%rsp) RESTORE_ARGS 1,24,1,1,1,1 @@ -203,6 +205,7 @@ ENTRY(ia32_cstar_target) .quad 1b,ia32_badarg .previous GET_THREAD_INFO(%r10) + orl $TS_COMPAT,threadinfo_status(%r10) testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP),threadinfo_flags(%r10) CFI_REMEMBER_STATE jnz cstar_tracesys @@ -216,6 +219,7 @@ cstar_do_call: cli testl $_TIF_ALLWORK_MASK,threadinfo_flags(%r10) jnz int_ret_from_sys_call + andl $~TS_COMPAT,threadinfo_status(%r10) RESTORE_ARGS 1,-ARG_SKIP,1,1,1 movl RIP-ARGOFFSET(%rsp),%ecx CFI_REGISTER rip,rcx @@ -288,6 +292,7 @@ ENTRY(ia32_syscall) this could be a problem. */ SAVE_ARGS 0,0,1 GET_THREAD_INFO(%r10) + orl $TS_COMPAT,threadinfo_status(%r10) testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP),threadinfo_flags(%r10) jnz ia32_tracesys ia32_do_syscall: diff --git a/arch/x86_64/kernel/asm-offsets.c b/arch/x86_64/kernel/asm-offsets.c index 00a08d13230a..cfb4f9cebea4 100644 --- a/arch/x86_64/kernel/asm-offsets.c +++ b/arch/x86_64/kernel/asm-offsets.c @@ -33,6 +33,7 @@ int main(void) ENTRY(flags); ENTRY(addr_limit); ENTRY(preempt_count); + ENTRY(status); BLANK(); #undef ENTRY #define ENTRY(entry) DEFINE(pda_ ## entry, offsetof(struct x8664_pda, entry)) diff --git a/arch/x86_64/kernel/entry.S b/arch/x86_64/kernel/entry.S index 45e0ab8a1fca..300555bc56b3 100644 --- a/arch/x86_64/kernel/entry.S +++ b/arch/x86_64/kernel/entry.S @@ -313,6 +313,7 @@ int_with_check: movl threadinfo_flags(%rcx),%edx andl %edi,%edx jnz int_careful + andl $~TS_COMPAT,threadinfo_status(%rcx) jmp retint_swapgs /* Either reschedule or signal or syscall exit tracking needed. */ |