On 3/9/2023 7:48 PM, Gupta, Pankaj wrote:
On 1/22/2023 3:46 AM, Tianyu Lan wrote:
From: Tianyu Lan <tiala@xxxxxxxxxxxxx>
+ UNWIND_HINT_IRET_REGS
+ ASM_CLAC
+ pushq $-1 /* ORIG_RAX: no syscall to restart */
+
+ testb $3, CS-ORIG_RAX(%rsp)
+ jnz .Lfrom_usermode_switch_stack_\@
+
+ call paranoid_entry
+
+ UNWIND_HINT_REGS
+
+ /*
+ * Switch off the IST stack to make it free for nested exceptions.
+ */
+ movq %rsp, %rdi /* pt_regs pointer */
+ call hv_switch_off_ist
+ movq %rax, %rsp /* Switch to new stack */
+
We need "ENCODE_FRAME_POINTER" similar to "vc_switch_off_ist" here as we
are switching stack?
Agree. Will add it into the next version. Thanks.
