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[X86] Enable compilation of user interrupt handlers.
Add __uintr_frame structure and use UIRET instruction for functions with x86 interrupt calling convention when UINTR is present. Reviewed By: LuoYuanke Differential Revision: https://reviews.llvm.org/D99708
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --no_x86_scrub_sp --no_x86_scrub_rip | ||
; RUN: llc < %s | FileCheck %s -check-prefixes=CHECK-USER | ||
; RUN: llc -O0 < %s | FileCheck %s -check-prefixes=CHECK0-USER | ||
; RUN: llc -code-model=kernel < %s | FileCheck %s -check-prefixes=CHECK-KERNEL | ||
; RUN: llc -O0 -code-model=kernel < %s | FileCheck %s -check-prefixes=CHECK0-KERNEL | ||
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" | ||
target triple = "x86_64-unknown-linux-gnu" | ||
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%struct.__uintr_frame = type { i64, i64, i64 } | ||
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; #include <x86gprintrin.h> | ||
; | ||
; void | ||
; __attribute__ ((interrupt)) | ||
; test_uintr_isr_cc_empty(struct __uintr_frame *frame, unsigned long long uirrv) | ||
; { | ||
; } | ||
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define dso_local x86_intrcc void @test_uintr_isr_cc_empty(%struct.__uintr_frame* nocapture byval(%struct.__uintr_frame) %frame, i64 %uirrv) #0 { | ||
; CHECK-USER-LABEL: test_uintr_isr_cc_empty: | ||
; CHECK-USER: # %bb.0: # %entry | ||
; CHECK-USER-NEXT: pushq %rax | ||
; CHECK-USER-NEXT: cld | ||
; CHECK-USER-NEXT: addq $16, %rsp | ||
; CHECK-USER-NEXT: uiret | ||
; | ||
; CHECK0-USER-LABEL: test_uintr_isr_cc_empty: | ||
; CHECK0-USER: # %bb.0: # %entry | ||
; CHECK0-USER-NEXT: pushq %rax | ||
; CHECK0-USER-NEXT: cld | ||
; CHECK0-USER-NEXT: addq $16, %rsp | ||
; CHECK0-USER-NEXT: uiret | ||
; | ||
; CHECK-KERNEL-LABEL: test_uintr_isr_cc_empty: | ||
; CHECK-KERNEL: # %bb.0: # %entry | ||
; CHECK-KERNEL-NEXT: pushq %rax | ||
; CHECK-KERNEL-NEXT: cld | ||
; CHECK-KERNEL-NEXT: addq $16, %rsp | ||
; CHECK-KERNEL-NEXT: iretq | ||
; | ||
; CHECK0-KERNEL-LABEL: test_uintr_isr_cc_empty: | ||
; CHECK0-KERNEL: # %bb.0: # %entry | ||
; CHECK0-KERNEL-NEXT: pushq %rax | ||
; CHECK0-KERNEL-NEXT: cld | ||
; CHECK0-KERNEL-NEXT: addq $16, %rsp | ||
; CHECK0-KERNEL-NEXT: iretq | ||
entry: | ||
ret void | ||
} | ||
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; unsigned long long g_rip; | ||
; unsigned long long g_rflags; | ||
; unsigned long long g_rsp; | ||
; unsigned long long g_uirrv; | ||
; | ||
; void | ||
; __attribute__((interrupt)) | ||
; test_uintr_isr_cc_args(struct __uintr_frame *frame, unsigned long long uirrv) | ||
; { | ||
; g_rip = frame->rip; | ||
; g_rflags = frame->rflags; | ||
; g_rsp = frame->rsp; | ||
; g_uirrv = uirrv; | ||
; } | ||
@g_rip = dso_local local_unnamed_addr global i64 0, align 8 | ||
@g_rflags = dso_local local_unnamed_addr global i64 0, align 8 | ||
@g_rsp = dso_local local_unnamed_addr global i64 0, align 8 | ||
@g_uirrv = dso_local local_unnamed_addr global i64 0, align 8 | ||
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define dso_local x86_intrcc void @test_uintr_isr_cc_args(%struct.__uintr_frame* nocapture readonly byval(%struct.__uintr_frame) %frame, i64 %uirrv) #0 { | ||
; CHECK-USER-LABEL: test_uintr_isr_cc_args: | ||
; CHECK-USER: # %bb.0: # %entry | ||
; CHECK-USER-NEXT: pushq %rax | ||
; CHECK-USER-NEXT: pushq %rax | ||
; CHECK-USER-NEXT: pushq %rdx | ||
; CHECK-USER-NEXT: pushq %rcx | ||
; CHECK-USER-NEXT: cld | ||
; CHECK-USER-NEXT: movq 32(%rsp), %rax | ||
; CHECK-USER-NEXT: movq 40(%rsp), %rcx | ||
; CHECK-USER-NEXT: movq 48(%rsp), %rdx | ||
; CHECK-USER-NEXT: movq %rcx, g_rip(%rip) | ||
; CHECK-USER-NEXT: movq %rdx, g_rflags(%rip) | ||
; CHECK-USER-NEXT: movq 56(%rsp), %rcx | ||
; CHECK-USER-NEXT: movq %rcx, g_rsp(%rip) | ||
; CHECK-USER-NEXT: movq %rax, g_uirrv(%rip) | ||
; CHECK-USER-NEXT: popq %rcx | ||
; CHECK-USER-NEXT: popq %rdx | ||
; CHECK-USER-NEXT: popq %rax | ||
; CHECK-USER-NEXT: addq $16, %rsp | ||
; CHECK-USER-NEXT: uiret | ||
; | ||
; CHECK0-USER-LABEL: test_uintr_isr_cc_args: | ||
; CHECK0-USER: # %bb.0: # %entry | ||
; CHECK0-USER-NEXT: pushq %rax | ||
; CHECK0-USER-NEXT: pushq %rax | ||
; CHECK0-USER-NEXT: pushq %rdx | ||
; CHECK0-USER-NEXT: pushq %rcx | ||
; CHECK0-USER-NEXT: cld | ||
; CHECK0-USER-NEXT: movq 32(%rsp), %rax | ||
; CHECK0-USER-NEXT: leaq 40(%rsp), %rcx | ||
; CHECK0-USER-NEXT: movq (%rcx), %rdx | ||
; CHECK0-USER-NEXT: movq %rdx, g_rip(%rip) | ||
; CHECK0-USER-NEXT: movq 8(%rcx), %rdx | ||
; CHECK0-USER-NEXT: movq %rdx, g_rflags(%rip) | ||
; CHECK0-USER-NEXT: movq 16(%rcx), %rcx | ||
; CHECK0-USER-NEXT: movq %rcx, g_rsp(%rip) | ||
; CHECK0-USER-NEXT: movq %rax, g_uirrv(%rip) | ||
; CHECK0-USER-NEXT: popq %rcx | ||
; CHECK0-USER-NEXT: popq %rdx | ||
; CHECK0-USER-NEXT: popq %rax | ||
; CHECK0-USER-NEXT: addq $16, %rsp | ||
; CHECK0-USER-NEXT: uiret | ||
; | ||
; CHECK-KERNEL-LABEL: test_uintr_isr_cc_args: | ||
; CHECK-KERNEL: # %bb.0: # %entry | ||
; CHECK-KERNEL-NEXT: pushq %rax | ||
; CHECK-KERNEL-NEXT: pushq %rax | ||
; CHECK-KERNEL-NEXT: pushq %rdx | ||
; CHECK-KERNEL-NEXT: pushq %rcx | ||
; CHECK-KERNEL-NEXT: cld | ||
; CHECK-KERNEL-NEXT: movq 32(%rsp), %rax | ||
; CHECK-KERNEL-NEXT: movq 40(%rsp), %rcx | ||
; CHECK-KERNEL-NEXT: movq 48(%rsp), %rdx | ||
; CHECK-KERNEL-NEXT: movq %rcx, g_rip(%rip) | ||
; CHECK-KERNEL-NEXT: movq %rdx, g_rflags(%rip) | ||
; CHECK-KERNEL-NEXT: movq 56(%rsp), %rcx | ||
; CHECK-KERNEL-NEXT: movq %rcx, g_rsp(%rip) | ||
; CHECK-KERNEL-NEXT: movq %rax, g_uirrv(%rip) | ||
; CHECK-KERNEL-NEXT: popq %rcx | ||
; CHECK-KERNEL-NEXT: popq %rdx | ||
; CHECK-KERNEL-NEXT: popq %rax | ||
; CHECK-KERNEL-NEXT: addq $16, %rsp | ||
; CHECK-KERNEL-NEXT: iretq | ||
; | ||
; CHECK0-KERNEL-LABEL: test_uintr_isr_cc_args: | ||
; CHECK0-KERNEL: # %bb.0: # %entry | ||
; CHECK0-KERNEL-NEXT: pushq %rax | ||
; CHECK0-KERNEL-NEXT: pushq %rax | ||
; CHECK0-KERNEL-NEXT: pushq %rdx | ||
; CHECK0-KERNEL-NEXT: pushq %rcx | ||
; CHECK0-KERNEL-NEXT: cld | ||
; CHECK0-KERNEL-NEXT: movq 32(%rsp), %rax | ||
; CHECK0-KERNEL-NEXT: leaq 40(%rsp), %rcx | ||
; CHECK0-KERNEL-NEXT: movq (%rcx), %rdx | ||
; CHECK0-KERNEL-NEXT: movq %rdx, g_rip(%rip) | ||
; CHECK0-KERNEL-NEXT: movq 8(%rcx), %rdx | ||
; CHECK0-KERNEL-NEXT: movq %rdx, g_rflags(%rip) | ||
; CHECK0-KERNEL-NEXT: movq 16(%rcx), %rcx | ||
; CHECK0-KERNEL-NEXT: movq %rcx, g_rsp(%rip) | ||
; CHECK0-KERNEL-NEXT: movq %rax, g_uirrv(%rip) | ||
; CHECK0-KERNEL-NEXT: popq %rcx | ||
; CHECK0-KERNEL-NEXT: popq %rdx | ||
; CHECK0-KERNEL-NEXT: popq %rax | ||
; CHECK0-KERNEL-NEXT: addq $16, %rsp | ||
; CHECK0-KERNEL-NEXT: iretq | ||
entry: | ||
%rip = getelementptr inbounds %struct.__uintr_frame, %struct.__uintr_frame* %frame, i64 0, i32 0 | ||
%0 = load i64, i64* %rip, align 8 | ||
store i64 %0, i64* @g_rip, align 8 | ||
%rflags = getelementptr inbounds %struct.__uintr_frame, %struct.__uintr_frame* %frame, i64 0, i32 1 | ||
%1 = load i64, i64* %rflags, align 8 | ||
store i64 %1, i64* @g_rflags, align 8 | ||
%rsp = getelementptr inbounds %struct.__uintr_frame, %struct.__uintr_frame* %frame, i64 0, i32 2 | ||
%2 = load i64, i64* %rsp, align 8 | ||
store i64 %2, i64* @g_rsp, align 8 | ||
store i64 %uirrv, i64* @g_uirrv, align 8 | ||
ret void | ||
} | ||
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attributes #0 = { nofree norecurse nounwind willreturn "disable-tail-calls"="true" "frame-pointer"="none" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+uintr" "tune-cpu"="generic" } |