arm-thumb-range-thunk-os.s
6.24 KB
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// REQUIRES: arm
// RUN: llvm-mc -arm-add-build-attributes -filetype=obj -triple=thumbv7a-none-linux-gnueabi %s -o %t
// RUN: ld.lld %t -o %t2
// The output file is large, most of it zeroes. We dissassemble only the
// parts we need to speed up the test and avoid a large output file
// RUN: llvm-objdump -d %t2 --start-address=1048576 --stop-address=1048588 --triple=thumbv7a-linux-gnueabihf | FileCheck --check-prefix=CHECK1 %s
// RUN: llvm-objdump -d %t2 --start-address=2097152 --stop-address=2097154 --triple=thumbv7a-linux-gnueabihf | FileCheck --check-prefix=CHECK2 %s
// RUN: llvm-objdump -d %t2 --start-address=3145728 --stop-address=3145730 --triple=thumbv7a-linux-gnueabihf | FileCheck --check-prefix=CHECK3 %s
// RUN: llvm-objdump -d %t2 --start-address=4194304 --stop-address=4194310 --triple=thumbv7a-linux-gnueabihf | FileCheck --check-prefix=CHECK4 %s
// RUN: llvm-objdump -d %t2 --start-address=16777216 --stop-address=16777270 --triple=thumbv7a-linux-gnueabihf | FileCheck --check-prefix=CHECK5 %s
// RUN: llvm-objdump -d %t2 --start-address=17825792 --stop-address=17825808 --triple=thumbv7a-linux-gnueabihf | FileCheck --check-prefix=CHECK6 %s
// RUN: llvm-objdump -d %t2 --start-address=20971524 --stop-address=20971532 --triple=thumbv7a-linux-gnueabihf | FileCheck --check-prefix=CHECK7 %s
// RUN: llvm-objdump -d %t2 --start-address=31457280 --stop-address=31457286 --triple=thumbv7a-linux-gnueabihf | FileCheck --check-prefix=CHECK8 %s
// RUN: llvm-objdump -d %t2 --start-address=35651584 --stop-address=35651594 --triple=thumbv7a-linux-gnueabihf | FileCheck --check-prefix=CHECK9 %s
// RUN: llvm-objdump -d %t2 --start-address=36700160 --stop-address=36700170 --triple=thumbv7a-linux-gnueabihf | FileCheck --check-prefix=CHECK10 %s
// Test the Range extension Thunks for Thumb when all the code is in a single
// OutputSection. The Thumb unconditional branch b.w and branch and link bl
// instructions have a range of 16Mb. We create a series of Functions a
// megabyte apart. We expect range extension thunks to be created when a
// branch is out of range. Thunks will be reused whenever they are in range
.syntax unified
// Define a function aligned on a megabyte boundary
.macro FUNCTION suff
.section .text.\suff\(), "ax", %progbits
.thumb
.balign 0x100000
.globl tfunc\suff\()
.type tfunc\suff\(), %function
tfunc\suff\():
bx lr
.endm
.section .text, "ax", %progbits
.thumb
.globl _start
_start:
// tfunc00 and tfunc15 are within 16Mb no Range Thunks expected
bl tfunc00
bl tfunc15
// tfunc16 is > 16Mb away, expect a Range Thunk to be generated, to go into
// the first of the pre-created ThunkSections.
bl tfunc16
// CHECK1: Disassembly of section .text:
// CHECK1-EMPTY:
// CHECK1-NEXT: <_start>:
// CHECK1-NEXT: 100000: ff f0 fe ff bl #1048572
// CHECK1-NEXT: 100004: ff f3 fc d7 bl #16777208
// CHECK1-NEXT: 100008: ff f2 fc d7 bl #15728632
FUNCTION 00
// CHECK2: <tfunc00>:
// CHECK2-NEXT: 200000: 70 47 bx lr
FUNCTION 01
// CHECK3: <tfunc01>:
// CHECK3-NEXT: 300000: 70 47 bx lr
FUNCTION 02
// tfunc28 is > 16Mb away, expect a Range Thunk to be generated, to go into
// the first of the pre-created ThunkSections.
b.w tfunc28
// CHECK4: <tfunc02>:
// CHECK4-NEXT: 400000: 70 47 bx lr
// CHECK4-NEXT: 400002: 00 f0 01 90 b.w #12582914 <__Thumbv7ABSLongThunk_tfunc28>
FUNCTION 03
FUNCTION 04
FUNCTION 05
FUNCTION 06
FUNCTION 07
FUNCTION 08
FUNCTION 09
FUNCTION 10
FUNCTION 11
FUNCTION 12
FUNCTION 13
FUNCTION 14
// Expect precreated ThunkSection here
// CHECK5: <__Thumbv7ABSLongThunk_tfunc16>:
// CHECK5-NEXT: 1000004: ff f1 fc bf b.w #2097144 <tfunc16>
// CHECK5: <__Thumbv7ABSLongThunk_tfunc28>:
// CHECK5-NEXT: 1000008: ff f1 fa 97 b.w #14680052 <tfunc28>
// CHECK5: <__Thumbv7ABSLongThunk_tfunc32>:
// CHECK5-NEXT: 100000c: 40 f2 01 0c movw r12, #1
// CHECK5-NEXT: 1000010: c0 f2 20 2c movt r12, #544
// CHECK5-NEXT: 1000014: 60 47 bx r12
// CHECK5: <__Thumbv7ABSLongThunk_tfunc33>:
// CHECK5-NEXT: 1000016: 40 f2 01 0c movw r12, #1
// CHECK5-NEXT: 100001a: c0 f2 30 2c movt r12, #560
// CHECK5-NEXT: 100001e: 60 47 bx r12
// CHECK5: <__Thumbv7ABSLongThunk_tfunc02>:
// CHECK5-NEXT: 1000020: ff f7 ee 97 b.w #-12582948 <tfunc02>
FUNCTION 15
// tfunc00 and tfunc01 are < 16Mb away, expect no range extension thunks
bl tfunc00
bl tfunc01
// tfunc32 and tfunc33 are > 16Mb away, expect range extension thunks in the
// precreated thunk section
bl tfunc32
bl tfunc33
// CHECK6: <tfunc15>:
// CHECK6-NEXT: 1100000: 70 47 bx lr
// CHECK6-NEXT: 1100002: ff f4 fd d7 bl #-15728646
// CHECK6-NEXT: 1100006: ff f5 fb d7 bl #-14680074
// CHECK6-NEXT: 110000a: ff f6 ff ff bl #-1048578
// CHECK6-NEXT: 110000e: 00 f7 02 f8 bl #-1048572
FUNCTION 16
FUNCTION 17
FUNCTION 18
// Expect another precreated thunk section here
// CHECK7: <__Thumbv7ABSLongThunk_tfunc15>:
// CHECK7-NEXT: 1400004: ff f4 fc bf b.w #-3145736 <tfunc15>
// CHECK7: <__Thumbv7ABSLongThunk_tfunc16>:
// CHECK7-NEXT: 1400008: ff f5 fa bf b.w #-2097164 <tfunc16>
FUNCTION 19
FUNCTION 20
FUNCTION 21
FUNCTION 22
FUNCTION 23
FUNCTION 24
FUNCTION 25
FUNCTION 26
FUNCTION 27
FUNCTION 28
// tfunc02 is > 16Mb away, expect range extension thunks in precreated thunk
// section
// CHECK8: <tfunc28>:
// CHECK8-NEXT: 1e00000: 70 47 bx lr
// CHECK8-NEXT: 1e00002: 00 f6 0d 90 b.w #-14680038 <__Thumbv7ABSLongThunk_tfunc02>
b.w tfunc02
FUNCTION 29
FUNCTION 30
FUNCTION 31
FUNCTION 32
// tfunc15 and tfunc16 are > 16 Mb away expect Thunks in the nearest
// precreated thunk section.
bl tfunc15
bl tfunc16
// CHECK9: <tfunc32>:
// CHECK9: 2200000: 70 47 bx lr
// CHECK9-NEXT: 2200002: ff f5 ff d7 bl #-14680066
// CHECK9-NEXT: 2200006: ff f5 ff d7 bl #-14680066
FUNCTION 33
bl tfunc15
bl tfunc16
// CHECK10: <tfunc33>:
// CHECK10: 2300000: 70 47 bx lr
// CHECK10-NEXT: 2300002: ff f4 ff d7 bl #-15728642
// CHECK10-NEXT: 2300006: ff f4 ff d7 bl #-15728642