search for: trace_irqs_off

...*/ - sti + ENABLE_INTERRUPTS(CLBR_NONE) movl %ebp,%ebp /* zero extension */ pushq $__USER32_DS CFI_ADJUST_CFA_OFFSET 8 @@ -123,7 +130,7 @@ sysenter_do_call: call *ia32_sys_call_table(,%rax,8) movq %rax,RAX-ARGOFFSET(%rsp) GET_THREAD_INFO(%r10) - cli + DISABLE_INTERRUPTS(CLBR_NONE) TRACE_IRQS_OFF testl $_TIF_ALLWORK_MASK,threadinfo_flags(%r10) jnz int_ret_from_sys_call @@ -141,7 +148,7 @@ sysenter_do_call: CFI_REGISTER rip,rdx TRACE_IRQS_ON swapgs - sti /* sti only takes effect after the next instruction */ + ENABLE_INTERRUPTS(CLBR_NONE) /* sti only takes effect after the next...

...*/ - sti + ENABLE_INTERRUPTS(CLBR_NONE) movl %ebp,%ebp /* zero extension */ pushq $__USER32_DS CFI_ADJUST_CFA_OFFSET 8 @@ -123,7 +130,7 @@ sysenter_do_call: call *ia32_sys_call_table(,%rax,8) movq %rax,RAX-ARGOFFSET(%rsp) GET_THREAD_INFO(%r10) - cli + DISABLE_INTERRUPTS(CLBR_NONE) TRACE_IRQS_OFF testl $_TIF_ALLWORK_MASK,threadinfo_flags(%r10) jnz int_ret_from_sys_call @@ -141,7 +148,7 @@ sysenter_do_call: CFI_REGISTER rip,rdx TRACE_IRQS_ON swapgs - sti /* sti only takes effect after the next instruction */ + ENABLE_INTERRUPTS(CLBR_NONE) /* sti only takes effect after the next...

...aight * and short: */ - sti + ENABLE_INTERRUPTS(CLBR_NONE) SAVE_ARGS 8,1 movq %rax,ORIG_RAX-ARGOFFSET(%rsp) movq %rcx,RIP-ARGOFFSET(%rsp) @@ -245,7 +253,7 @@ ret_from_sys_call: /* edi: flagmask */ sysret_check: GET_THREAD_INFO(%rcx) - cli + DISABLE_INTERRUPTS(CLBR_NONE) TRACE_IRQS_OFF movl threadinfo_flags(%rcx),%edx andl %edi,%edx @@ -261,7 +269,7 @@ sysret_check: /*CFI_REGISTER rflags,r11*/ movq %gs:pda_oldrsp,%rsp swapgs - sysretq + SYSRETQ CFI_RESTORE_STATE /* Handle reschedules */ @@ -270,7 +278,7 @@ sysret_careful: bt $TIF_NEED_RESCHED,%edx jnc sysret...

...aight * and short: */ - sti + ENABLE_INTERRUPTS(CLBR_NONE) SAVE_ARGS 8,1 movq %rax,ORIG_RAX-ARGOFFSET(%rsp) movq %rcx,RIP-ARGOFFSET(%rsp) @@ -245,7 +253,7 @@ ret_from_sys_call: /* edi: flagmask */ sysret_check: GET_THREAD_INFO(%rcx) - cli + DISABLE_INTERRUPTS(CLBR_NONE) TRACE_IRQS_OFF movl threadinfo_flags(%rcx),%edx andl %edi,%edx @@ -261,7 +269,7 @@ sysret_check: /*CFI_REGISTER rflags,r11*/ movq %gs:pda_oldrsp,%rsp swapgs - sysretq + SYSRETQ CFI_RESTORE_STATE /* Handle reschedules */ @@ -270,7 +278,7 @@ sysret_careful: bt $TIF_NEED_RESCHED,%edx jnc sysret...

Hi Andrew, This series of patches lays the basic ground work for the paravirtualized kernel patches coming later on. I think this lot is ready for the rough-and-tumble world of the -mm tree. The main change from the last posting is that all the page-table related patches have been moved out, and will be posted separately. Also, the off-by-one in reserving the top of address space has been

Hi Andrew, This series of patches lays the basic ground work for the paravirtualized kernel patches coming later on. I think this lot is ready for the rough-and-tumble world of the -mm tree. The main change from the last posting is that all the page-table related patches have been moved out, and will be posted separately. Also, the off-by-one in reserving the top of address space has been

OK, this is the revised paravirt.h (Andi has seen this before), then the second is the binary patching stuff. More things get added to the paravirt struct in future patches, but this basic stuff hasn't changed for some time. ==== This patch does the dumbest possible replacement of paravirtualized instructions: calls through a "paravirt_ops" structure. Currently these are function

...kernel/entry_32.S index 2c63407..985f7b3 100644 --- a/arch/x86/kernel/entry_32.S +++ b/arch/x86/kernel/entry_32.S @@ -1042,7 +1042,7 @@ ENTRY(xen_sysenter_target) ENTRY(xen_hypervisor_callback) CFI_STARTPROC - pushl_cfi $0 + pushl_cfi $-1 /* orig_ax = -1 => not a system call */ SAVE_ALL TRACE_IRQS_OFF @@ -1084,14 +1084,16 @@ ENTRY(xen_failsafe_callback) 2: mov 8(%esp),%es 3: mov 12(%esp),%fs 4: mov 16(%esp),%gs + /* EAX == 0 => Category 1 (Bad segment) + EAX != 0 => Category 2 (Bad IRET) */ testl %eax,%eax popl_cfi %eax lea 16(%esp),%esp CFI_ADJUST_CFA_OFFSET -16 jz 5f...

[ REPOST: Apologies to anyone who has seen this before. It didn't make it onto any of the lists it should have. -J ] Hi Andrew, This series of patches lays the basic ground work for the paravirtualized kernel patches coming later on. I think this lot is ready for the rough-and-tumble world of the -mm tree. For the most part, these patches do nothing or very little. The patches should

[ REPOST: Apologies to anyone who has seen this before. It didn't make it onto any of the lists it should have. -J ] Hi Andrew, This series of patches lays the basic ground work for the paravirtualized kernel patches coming later on. I think this lot is ready for the rough-and-tumble world of the -mm tree. For the most part, these patches do nothing or very little. The patches should

The following patches introduce the core infrastructure needed to paravirtualize the 32-bit x86 Linux kernel. This is done by moving virtualization sensitive insn's or code paths to a function table, paravirt_ops. This structure can be populated with hypervisor specific calls or native stubs and currently support running on bare metal, VMI, Xen, or Lhype. These patches apply to

The following patches introduce the core infrastructure needed to paravirtualize the 32-bit x86 Linux kernel. This is done by moving virtualization sensitive insn's or code paths to a function table, paravirt_ops. This structure can be populated with hypervisor specific calls or native stubs and currently support running on bare metal, VMI, Xen, or Lhype. These patches apply to

...ND(async_page_fault) #endif -/* - * End of kprobes section - */ - .popsection diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S index e21b078..c48f8f9 100644 --- a/arch/x86/kernel/entry_64.S +++ b/arch/x86/kernel/entry_64.S @@ -487,8 +487,6 @@ ENDPROC(native_usergs_sysret64) TRACE_IRQS_OFF .endm -/* save complete stack frame */ - .pushsection .kprobes.text, "ax" ENTRY(save_paranoid) XCPT_FRAME 1 RDI+8 cld @@ -517,7 +515,6 @@ ENTRY(save_paranoid) 1: ret CFI_ENDPROC END(save_paranoid) - .popsection /* * A newly forked process directly context switches into t...

..., thread_info, cpu); BLANK(); OFFSET(GDS_size, Xgt_desc_struct, size); =================================================================== --- a/arch/i386/kernel/entry.S +++ b/arch/i386/kernel/entry.S @@ -1030,7 +1030,21 @@ ENTRY(xen_hypervisor_callback) CFI_ADJUST_CFA_OFFSET 4 SAVE_ALL TRACE_IRQS_OFF - mov %esp, %eax + + /* Check to see if we got the event in the critical + region in xen_iret_direct, after we've reenabled + events and checked for pending events. This simulates + iret instruction's behaviour where it delivers a + pending interrupt when enabling interrupts. *...

..., thread_info, cpu); BLANK(); OFFSET(GDS_size, Xgt_desc_struct, size); =================================================================== --- a/arch/i386/kernel/entry.S +++ b/arch/i386/kernel/entry.S @@ -1030,7 +1030,21 @@ ENTRY(xen_hypervisor_callback) CFI_ADJUST_CFA_OFFSET 4 SAVE_ALL TRACE_IRQS_OFF - mov %esp, %eax + + /* Check to see if we got the event in the critical + region in xen_iret_direct, after we've reenabled + events and checked for pending events. This simulates + iret instruction's behaviour where it delivers a + pending interrupt when enabling interrupts. *...

..., thread_info, cpu); BLANK(); OFFSET(GDS_size, Xgt_desc_struct, size); =================================================================== --- a/arch/i386/kernel/entry.S +++ b/arch/i386/kernel/entry.S @@ -1030,7 +1030,21 @@ ENTRY(xen_hypervisor_callback) CFI_ADJUST_CFA_OFFSET 4 SAVE_ALL TRACE_IRQS_OFF - mov %esp, %eax + + /* Check to see if we got the event in the critical + region in xen_iret_direct, after we've reenabled + events and checked for pending events. This simulates + iret instruction's behaviour where it delivers a + pending interrupt when enabling interrupts. *...

..., thread_info, cpu); BLANK(); OFFSET(GDS_size, Xgt_desc_struct, size); =================================================================== --- a/arch/i386/kernel/entry.S +++ b/arch/i386/kernel/entry.S @@ -1030,7 +1030,21 @@ ENTRY(xen_hypervisor_callback) CFI_ADJUST_CFA_OFFSET 4 SAVE_ALL TRACE_IRQS_OFF - mov %esp, %eax + + /* Check to see if we got the event in the critical + region in xen_iret_direct, after we've reenabled + events and checked for pending events. This simulates + iret instruction's behaviour where it delivers a + pending interrupt when enabling interrupts. *...

..., thread_info, cpu); BLANK(); OFFSET(GDS_size, Xgt_desc_struct, size); =================================================================== --- a/arch/i386/kernel/entry.S +++ b/arch/i386/kernel/entry.S @@ -1030,7 +1030,21 @@ ENTRY(xen_hypervisor_callback) CFI_ADJUST_CFA_OFFSET 4 SAVE_ALL TRACE_IRQS_OFF - mov %esp, %eax + + /* Check to see if we got the event in the critical + region in xen_iret_direct, after we've reenabled + events and checked for pending events. This simulates + iret instruction's behaviour where it delivers a + pending interrupt when enabling interrupts. *...

Currently the blacklist is maintained by hand in kprobes.c which is separated from the function definition and is hard to catch up the kernel update. To solve this issue, I've tried to implement new NOKPROBE_SYMBOL() macro for making kprobe blacklist at build time. Since the NOKPROBE_SYMBOL() macros can be placed right after the function is defined, it is easy to maintain. At this moment, I

Currently the blacklist is maintained by hand in kprobes.c which is separated from the function definition and is hard to catch up the kernel update. To solve this issue, I've tried to implement new NOKPROBE_SYMBOL() macro for making kprobe blacklist at build time. Since the NOKPROBE_SYMBOL() macros can be placed right after the function is defined, it is easy to maintain. At this moment, I