mirror of
https://github.com/Divested-Mobile/DivestOS-Build.git
synced 2024-10-01 01:35:54 -04:00
106 lines
2.9 KiB
Diff
106 lines
2.9 KiB
Diff
diff --git a/arch/x86/include/asm/irqflags.h b/arch/x86/include/asm/irqflags.h
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index bba3cf8..0a8b519 100644
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--- a/arch/x86/include/asm/irqflags.h
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+++ b/arch/x86/include/asm/irqflags.h
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@@ -129,7 +129,7 @@
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#define PARAVIRT_ADJUST_EXCEPTION_FRAME /* */
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-#define INTERRUPT_RETURN iretq
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+#define INTERRUPT_RETURN jmp native_iret
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#define USERGS_SYSRET64 \
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swapgs; \
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sysretq;
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diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
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index f9315d9..db230f8 100644
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--- a/arch/x86/kernel/entry_64.S
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+++ b/arch/x86/kernel/entry_64.S
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@@ -1056,27 +1056,24 @@
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RESTORE_ARGS 1,8,1
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irq_return:
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+ INTERRUPT_RETURN
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+
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+ENTRY(native_iret)
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/*
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* Are we returning to a stack segment from the LDT? Note: in
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* 64-bit mode SS:RSP on the exception stack is always valid.
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*/
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#ifdef CONFIG_X86_ESPFIX64
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testb $4,(SS-RIP)(%rsp)
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- jnz irq_return_ldt
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+ jnz native_irq_return_ldt
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#endif
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-irq_return_iret:
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- INTERRUPT_RETURN
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- _ASM_EXTABLE(irq_return_iret, bad_iret)
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-
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-#ifdef CONFIG_PARAVIRT
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-ENTRY(native_iret)
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+native_irq_return_iret:
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iretq
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- _ASM_EXTABLE(native_iret, bad_iret)
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-#endif
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+ _ASM_EXTABLE(native_irq_return_iret, bad_iret)
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#ifdef CONFIG_X86_ESPFIX64
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-irq_return_ldt:
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+native_irq_return_ldt:
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pushq_cfi %rax
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pushq_cfi %rdi
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SWAPGS
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@@ -1098,7 +1095,7 @@
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SWAPGS
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movq %rax,%rsp
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popq_cfi %rax
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- jmp irq_return_iret
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+ jmp native_irq_return_iret
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#endif
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.section .fixup,"ax"
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@@ -1184,13 +1181,8 @@
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cmpl $__KERNEL_CS,CS(%rdi)
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jne do_double_fault
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movq RIP(%rdi),%rax
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- cmpq $irq_return_iret,%rax
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-#ifdef CONFIG_PARAVIRT
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- je 1f
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- cmpq $native_iret,%rax
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-#endif
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+ cmpq $native_irq_return_iret,%rax
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jne do_double_fault /* This shouldn't happen... */
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-1:
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movq PER_CPU_VAR(kernel_stack),%rax
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subq $(6*8-KERNEL_STACK_OFFSET),%rax /* Reset to original stack */
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movq %rax,RSP(%rdi)
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@@ -1658,7 +1650,7 @@
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*/
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error_kernelspace:
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incl %ebx
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- leaq irq_return_iret(%rip),%rcx
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+ leaq native_irq_return_iret(%rip),%rcx
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cmpq %rcx,RIP+8(%rsp)
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je error_swapgs
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movl %ecx,%eax /* zero extend */
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diff --git a/arch/x86/kernel/paravirt_patch_64.c b/arch/x86/kernel/paravirt_patch_64.c
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index 3f08f34..a1da673 100644
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--- a/arch/x86/kernel/paravirt_patch_64.c
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+++ b/arch/x86/kernel/paravirt_patch_64.c
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@@ -6,7 +6,6 @@
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DEF_NATIVE(pv_irq_ops, irq_enable, "sti");
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DEF_NATIVE(pv_irq_ops, restore_fl, "pushq %rdi; popfq");
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DEF_NATIVE(pv_irq_ops, save_fl, "pushfq; popq %rax");
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-DEF_NATIVE(pv_cpu_ops, iret, "iretq");
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DEF_NATIVE(pv_mmu_ops, read_cr2, "movq %cr2, %rax");
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DEF_NATIVE(pv_mmu_ops, read_cr3, "movq %cr3, %rax");
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DEF_NATIVE(pv_mmu_ops, write_cr3, "movq %rdi, %cr3");
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@@ -50,7 +49,6 @@
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PATCH_SITE(pv_irq_ops, save_fl);
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PATCH_SITE(pv_irq_ops, irq_enable);
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PATCH_SITE(pv_irq_ops, irq_disable);
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- PATCH_SITE(pv_cpu_ops, iret);
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PATCH_SITE(pv_cpu_ops, irq_enable_sysexit);
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PATCH_SITE(pv_cpu_ops, usergs_sysret32);
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PATCH_SITE(pv_cpu_ops, usergs_sysret64);
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