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authorAndi Kleen <ak@suse.de>2006-01-11 22:44:06 +0100
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-11 19:04:53 -0800
commitbf2fcc6fdfe4f4e92bb74f062c0a1be189f3a561 (patch)
tree0bcc33f681c7e8ce6596c9323d4a1026ede84994 /arch
parent2966387b481a11a90a7bed6600fc17b4253f6980 (diff)
[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.S5
-rw-r--r--arch/x86_64/kernel/asm-offsets.c1
-rw-r--r--arch/x86_64/kernel/entry.S1
3 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86_64/ia32/ia32entry.S b/arch/x86_64/ia32/ia32entry.S
index 8172e61c3f6..58f5bfb52c6 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 00a08d13230..cfb4f9cebea 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 45e0ab8a1fc..300555bc56b 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. */