Sign Up
Log In
Log In
or
Sign Up
Places
All Projects
Status Monitor
Collapse sidebar
openSUSE:12.2
xen
25098-x86-emul-lock-UD.patch
Overview
Repositories
Revisions
Requests
Users
Attributes
Meta
File 25098-x86-emul-lock-UD.patch of Package xen
# HG changeset patch # User Andrew Cooper <andrew.cooper3@citrix.com> # Date 1332535516 0 # Node ID 2e45b26bc412099a2b8f009bcf111e4b6c23847b # Parent 2ca43b65718fbe2d3f9ea36132e139ef774d9a11 x86_emulate: raise #UD rather than #GP on invalid use of LOCK prefix From: Andrew Cooper <andrew.cooper3@citrix.com> Signed-off-by: Keir Fraser <keir@xen.org> Committed-by: Keir Fraser <keir@xen.org> # HG changeset patch # User Keir Fraser <keir@xen.org> # Date 1332535908 0 # Node ID 4bd752a4cdf323c41c50f8cd6286f566d67adeae # Parent 2e45b26bc412099a2b8f009bcf111e4b6c23847b x86_emulate: Do not push an error code onto a #UD exception stack Signed-off-by: Keir Fraser <keir@xen.org> --- a/xen/arch/x86/x86_emulate/x86_emulate.c +++ b/xen/arch/x86/x86_emulate/x86_emulate.c @@ -1353,7 +1353,7 @@ x86_emulate( } /* Lock prefix is allowed only on RMW instructions. */ - generate_exception_if((d & Mov) && lock_prefix, EXC_GP, 0); + generate_exception_if((d & Mov) && lock_prefix, EXC_UD, -1); /* ModRM and SIB bytes. */ if ( d & ModRM ) @@ -1572,12 +1572,12 @@ x86_emulate( lock_prefix && ((b < 0x20) || (b > 0x23)) && /* MOV CRn/DRn */ (b != 0xc7), /* CMPXCHG{8,16}B */ - EXC_GP, 0); + EXC_UD, -1); dst.type = OP_NONE; break; case DstReg: - generate_exception_if(lock_prefix, EXC_GP, 0); + generate_exception_if(lock_prefix, EXC_UD, -1); dst.type = OP_REG; if ( d & ByteOp ) { @@ -1633,7 +1633,7 @@ x86_emulate( dst = ea; if ( dst.type == OP_REG ) { - generate_exception_if(lock_prefix, EXC_GP, 0); + generate_exception_if(lock_prefix, EXC_UD, -1); switch ( dst.bytes ) { case 1: dst.val = *(uint8_t *)dst.reg; break; @@ -3645,14 +3645,14 @@ x86_emulate( struct segment_register cs = { 0 }, ss = { 0 }; int rc; - generate_exception_if(in_realmode(ctxt, ops), EXC_UD, 0); - generate_exception_if(!in_protmode(ctxt, ops), EXC_UD, 0); + generate_exception_if(in_realmode(ctxt, ops), EXC_UD, -1); + generate_exception_if(!in_protmode(ctxt, ops), EXC_UD, -1); /* Inject #UD if syscall/sysret are disabled. */ fail_if(ops->read_msr == NULL); if ( (rc = ops->read_msr(MSR_EFER, &msr_content, ctxt)) != 0 ) goto done; - generate_exception_if((msr_content & EFER_SCE) == 0, EXC_UD, 0); + generate_exception_if((msr_content & EFER_SCE) == 0, EXC_UD, -1); if ( (rc = ops->read_msr(MSR_STAR, &msr_content, ctxt)) != 0 ) goto done;
Locations
Projects
Search
Status Monitor
Help
OpenBuildService.org
Documentation
API Documentation
Code of Conduct
Contact
Support
@OBShq
Terms
openSUSE Build Service is sponsored by
The Open Build Service is an
openSUSE project
.
Sign Up
Log In
Places
Places
All Projects
Status Monitor