[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v3] x86/vm_event: add gdtr_base to the vm_event structure
Receiving this register is useful for introspecting 32-bit Windows when the event being trapped happened while in ring3. Signed-off-by: Tamas K Lengyel <tamas@xxxxxxxxxxxxx> Cc: Razvan Cojocaru <rcojocaru@xxxxxxxxxxxxxxx> Cc: Tamas K Lengyel <tamas@xxxxxxxxxxxxx> Cc: Jan Beulich <jbeulich@xxxxxxxx> Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx> Cc: Wei Liu <wei.liu2@xxxxxxxxxx> Cc: Roger Pau Monne <roger.pau@xxxxxxxxxx> --- v2: add gdtr limit v3: use uint32_t to fit the 20 bits --- xen/arch/x86/vm_event.c | 6 ++++++ xen/include/public/vm_event.h | 5 +++-- 2 files changed, 9 insertions(+), 2 deletions(-) diff --git a/xen/arch/x86/vm_event.c b/xen/arch/x86/vm_event.c index 51c3493b1d..52c2a71fa0 100644 --- a/xen/arch/x86/vm_event.c +++ b/xen/arch/x86/vm_event.c @@ -179,6 +179,11 @@ static void vm_event_pack_segment_register(enum x86_segment segment, reg->es_sel = seg.sel; break; + case x86_seg_gdtr: + reg->gdtr_base = seg.base; + reg->gdtr_limit = seg.limit; + break; + default: ASSERT_UNREACHABLE(); } @@ -238,6 +243,7 @@ void vm_event_fill_regs(vm_event_request_t *req) vm_event_pack_segment_register(x86_seg_ss, &req->data.regs.x86); vm_event_pack_segment_register(x86_seg_ds, &req->data.regs.x86); vm_event_pack_segment_register(x86_seg_es, &req->data.regs.x86); + vm_event_pack_segment_register(x86_seg_gdtr, &req->data.regs.x86); req->data.regs.x86.shadow_gs = ctxt.shadow_gs; req->data.regs.x86.dr6 = ctxt.dr6; diff --git a/xen/include/public/vm_event.h b/xen/include/public/vm_event.h index b2bafc0d77..448c7d5ab9 100644 --- a/xen/include/public/vm_event.h +++ b/xen/include/public/vm_event.h @@ -29,7 +29,7 @@ #include "xen.h" -#define VM_EVENT_INTERFACE_VERSION 0x00000004 +#define VM_EVENT_INTERFACE_VERSION 0x00000005 #if defined(__XEN__) || defined(__XEN_TOOLS__) @@ -198,6 +198,7 @@ struct vm_event_regs_x86 { uint64_t msr_efer; uint64_t msr_star; uint64_t msr_lstar; + uint64_t gdtr_base; uint32_t cs_base; uint32_t ss_base; uint32_t ds_base; @@ -211,13 +212,13 @@ struct vm_event_regs_x86 { struct vm_event_x86_selector_reg fs; struct vm_event_x86_selector_reg gs; uint64_t shadow_gs; + uint32_t gdtr_limit; uint16_t cs_sel; uint16_t ss_sel; uint16_t ds_sel; uint16_t es_sel; uint16_t fs_sel; uint16_t gs_sel; - uint32_t _pad; }; /* -- 2.20.1 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxxx https://lists.xenproject.org/mailman/listinfo/xen-devel
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