# REQUIRES: x86
# RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t1.o
# RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %p/Inputs/x86-64-split-stack-extra.s -o %t2.o
# RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %p/Inputs/x86-64-split-stack-main.s -o %t3.o
# RUN: ld.lld --defsym __morestack=0x100 --defsym __morestack_non_split=0x200 %t1.o %t2.o %t3.o -o %t -z notext
# RUN: llvm-objdump --no-print-imm-hex -d %t | FileCheck %s
# Avoid duplicating the prologue for every test via macros.
.macro prologue1 function_to_call
.global prologue1_calls_\function_to_call
.type prologue1_calls_\function_to_call,@function
prologue1_calls_\function_to_call:
cmp %fs:0x70,%rsp
jae 1f
callq __morestack
retq
1:
# Various and duplicate calls to ensure every code path is taken.
callq \function_to_call
callq \function_to_call
callq 1b
callq non_function_text_symbol
retq
.size prologue1_calls_\function_to_call,. - prologue1_calls_\function_to_call
.endm
.macro prologue2 function_to_call register compare_amount
.global prologue2_calls_\function_to_call\register
.type prologue2_calls_\function_to_call\register,@function
prologue2_calls_\function_to_call\register:
lea -\compare_amount(%rsp),%\register
cmp %fs:0x70,%\register
jae 1f
callq __morestack
retq
1:
# Various and duplicate calls to ensure every code path is taken.
callq \function_to_call
callq \function_to_call
callq 1b
callq non_function_text_symbol
retq
.size prologue2_calls_\function_to_call\register,. - prologue2_calls_\function_to_call\register
.endm
.section .text,"ax",@progbits,unique,0
.local foo
foo:
.quad foo
.section .text,"ax",@progbits,unique,1
# For split-stack code calling split-stack code, ensure prologue v1 still
# calls plain __morestack, and that any raw bytes written to the prologue
# make sense.
# CHECK: <prologue1_calls_split>:
# CHECK-NEXT: cmp{{.*}}%fs:{{[^,]*}},{{.*}}%rsp
# CHECK: jae{{.*$}}
# CHECK-NEXT: callq{{.*}}<__morestack>
prologue1 split
# For split-stack code calling split-stack code, ensure prologue v2 still
# calls plain __morestack, that any raw bytes written to the prologue
# make sense, and that the register number is preserved.
# CHECK: <prologue2_calls_splitr10>:
# CHECK-NEXT: lea{{.*}} -512(%rsp),{{.*}}%r10
# CHECK: cmp{{.*}}%fs:{{[^,]*}},{{.*}}%r{{[0-9]+}}
# CHECK: jae{{.*}}
# CHECK-NEXT: callq{{.*}}<__morestack>
prologue2 split r10 0x200
# CHECK: <prologue2_calls_splitr11>:
# CHECK-NEXT: lea{{.*}} -256(%rsp),{{.*}}%r11
# CHECK: cmp{{.*}}%fs:{{[^,]*}},{{.*}}%r{{[0-9]+}}
# CHECK: jae{{.*}}
# CHECK-NEXT: callq{{.*}}<__morestack>
prologue2 split r11 0x100
# For split-stack code calling non-split-stack code, ensure prologue v1
# calls __morestack_non_split, and that any raw bytes written to the prologue
# make sense.
# CHECK: <prologue1_calls_non_split>:
# CHECK-NEXT: stc{{.*$}}
# CHECK-NEXT: nopl{{.*$}}
# CHECK: jae{{.*$}}
# CHECK-NEXT: callq{{.*}}<__morestack_non_split>
prologue1 non_split
# For split-stack code calling non-split-stack code, ensure prologue v2
# calls __morestack_non_split, that any raw bytes written to the prologue
# make sense, and that the register number is preserved
# CHECK: <prologue2_calls_non_splitr10>:
# CHECK-NEXT: lea{{.*}} -16640(%rsp),{{.*}}%r10
# CHECK: cmp{{.*}}%fs:{{[^,]*}},{{.*}}%r10
# CHECK: jae{{.*$}}
# CHECK-NEXT: callq{{.*}}<__morestack_non_split>
prologue2 non_split r10 0x100
# CHECK: <prologue2_calls_non_splitr11>:
# CHECK-NEXT: lea{{.*}} -16896(%rsp),{{.*}}%r11
# CHECK: cmp{{.*}}%fs:{{[^,]*}},{{.*}}%r11
# CHECK: jae{{.*$}}
# CHECK-NEXT: callq{{.*}}<__morestack_non_split>
prologue2 non_split r11 0x200
# CHECK: <prologue2_calls_non_split_hiddenr11>:
# CHECK-NEXT: lea{{.*}} -16896(%rsp),{{.*}}%r11
# CHECK: cmp{{.*}}%fs:{{[^,]*}},{{.*}}%r11
# CHECK: jae{{.*$}}
# CHECK-NEXT: callq{{.*}}<__morestack_non_split>
prologue2 non_split_hidden r11 0x200
.section .note.GNU-stack,"",@progbits
.section .note.GNU-split-stack,"",@progbits
Codebase Browser
llvm