diff options
| author | kib <kib@FreeBSD.org> | 2010-06-23 20:44:07 +0000 |
|---|---|---|
| committer | kib <kib@FreeBSD.org> | 2010-06-23 20:44:07 +0000 |
| commit | 8dcd1daee8fe0803727673a014545c545bf684e4 (patch) | |
| tree | 6f2a6ce8d3aa678205f3ae8e8fe722441473ab3e /sys/i386 | |
| parent | 1cd81ae69301b363e554de070b5f1f28f5b93d17 (diff) | |
| download | FreeBSD-src-8dcd1daee8fe0803727673a014545c545bf684e4.zip FreeBSD-src-8dcd1daee8fe0803727673a014545c545bf684e4.tar.gz | |
Clear DF bit in eflags/rflags on the kernel entry. The i386 and amd64
ABI specifies the DF should be zero, and newer compilers do not clear
DF before using DF-sensitive instructions.
The DF clearing for signal handlers was done some time ago.
MFC after: 1 week
Diffstat (limited to 'sys/i386')
| -rw-r--r-- | sys/i386/i386/apic_vector.s | 8 | ||||
| -rw-r--r-- | sys/i386/i386/atpic_vector.s | 1 | ||||
| -rw-r--r-- | sys/i386/i386/exception.s | 3 |
3 files changed, 12 insertions, 0 deletions
diff --git a/sys/i386/i386/apic_vector.s b/sys/i386/i386/apic_vector.s index e3000e1..cbe3871 100644 --- a/sys/i386/i386/apic_vector.s +++ b/sys/i386/i386/apic_vector.s @@ -56,6 +56,7 @@ IDTVEC(vec_name) ; \ PUSH_FRAME ; \ SET_KERNEL_SREGS ; \ + cld ; \ FAKE_MCOUNT(TF_EIP(%esp)) ; \ movl lapic, %edx ; /* pointer to local APIC */ \ movl LA_ISR + 16 * (index)(%edx), %eax ; /* load ISR */ \ @@ -103,6 +104,7 @@ IDTVEC(spuriousint) IDTVEC(timerint) PUSH_FRAME SET_KERNEL_SREGS + cld FAKE_MCOUNT(TF_EIP(%esp)) pushl %esp call lapic_handle_timer @@ -118,6 +120,7 @@ IDTVEC(timerint) IDTVEC(cmcint) PUSH_FRAME SET_KERNEL_SREGS + cld FAKE_MCOUNT(TF_EIP(%esp)) call lapic_handle_cmc MEXITCOUNT @@ -131,6 +134,7 @@ IDTVEC(cmcint) IDTVEC(errorint) PUSH_FRAME SET_KERNEL_SREGS + cld FAKE_MCOUNT(TF_EIP(%esp)) call lapic_handle_error MEXITCOUNT @@ -302,6 +306,7 @@ IDTVEC(invlcache) IDTVEC(ipi_intr_bitmap_handler) PUSH_FRAME SET_KERNEL_SREGS + cld movl lapic, %edx movl $0, LA_EOI(%edx) /* End Of Interrupt to APIC */ @@ -320,6 +325,7 @@ IDTVEC(ipi_intr_bitmap_handler) IDTVEC(cpustop) PUSH_FRAME SET_KERNEL_SREGS + cld movl lapic, %eax movl $0, LA_EOI(%eax) /* End Of Interrupt to APIC */ @@ -339,6 +345,7 @@ IDTVEC(cpustop) IDTVEC(rendezvous) PUSH_FRAME SET_KERNEL_SREGS + cld #ifdef COUNT_IPIS movl PCPU(CPUID), %eax @@ -360,6 +367,7 @@ IDTVEC(rendezvous) IDTVEC(lazypmap) PUSH_FRAME SET_KERNEL_SREGS + cld call pmap_lazyfix_action diff --git a/sys/i386/i386/atpic_vector.s b/sys/i386/i386/atpic_vector.s index 0e4e1b6..a477aee 100644 --- a/sys/i386/i386/atpic_vector.s +++ b/sys/i386/i386/atpic_vector.s @@ -49,6 +49,7 @@ IDTVEC(vec_name) ; \ PUSH_FRAME ; \ SET_KERNEL_SREGS ; \ + cld ; \ ; \ FAKE_MCOUNT(TF_EIP(%esp)) ; \ pushl %esp ; \ diff --git a/sys/i386/i386/exception.s b/sys/i386/i386/exception.s index 9db9532..575b98d 100644 --- a/sys/i386/i386/exception.s +++ b/sys/i386/i386/exception.s @@ -159,6 +159,7 @@ alltraps: pushl %fs alltraps_with_regs_pushed: SET_KERNEL_SREGS + cld FAKE_MCOUNT(TF_EIP(%esp)) calltrap: pushl %esp @@ -233,6 +234,7 @@ IDTVEC(lcall_syscall) pushl %es pushl %fs SET_KERNEL_SREGS + cld FAKE_MCOUNT(TF_EIP(%esp)) pushl %esp call syscall @@ -256,6 +258,7 @@ IDTVEC(int0x80_syscall) pushl %es pushl %fs SET_KERNEL_SREGS + cld FAKE_MCOUNT(TF_EIP(%esp)) pushl %esp call syscall |
