// REQUIRES: arm // RUN: llvm-mc -arm-add-build-attributes -filetype=obj -triple=armv7a-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 --no-print-imm-hex -d %t2 --start-address=0x100000 --stop-address=0x10001c --triple=armv7a-linux-gnueabihf | FileCheck --check-prefix=CHECK1 %s // RUN: llvm-objdump --no-print-imm-hex -d %t2 --start-address=0x200000 --stop-address=0x20000a | FileCheck --check-prefix=CHECK2 %s // RUN: llvm-objdump --no-print-imm-hex -d %t2 --start-address=0x1000004 --stop-address=0x1000010 --triple=armv7a-linux-gnueabihf | FileCheck --check-prefix=CHECK3 %s // RUN: llvm-objdump --no-print-imm-hex -d %t2 --start-address=0x1000010 --stop-address=0x100001a | FileCheck --check-prefix=CHECK4 %s // RUN: llvm-objdump --no-print-imm-hex -d %t2 --start-address=0x1f00004 --stop-address=0x1f0000e | FileCheck --check-prefix=CHECK5 %s // RUN: llvm-objdump --no-print-imm-hex -d %t2 --start-address=0x2200000 --stop-address=0x2200006 | FileCheck --check-prefix=CHECK6 %s // RUN: llvm-objdump --no-print-imm-hex -d %t2 --start-address=0x2300000 --stop-address=0x2300008 --triple=armv7a-linux-gnueabihf | FileCheck --check-prefix=CHECK7 %s // RUN: llvm-objdump --no-print-imm-hex -d %t2 --start-address=0x2e00004 --stop-address=0x2e00010 --triple=armv7a-linux-gnueabihf | FileCheck --check-prefix=CHECK8 %s // RUN: llvm-objdump --no-print-imm-hex -d %t2 --start-address=0x3300004 --stop-address=0x3300010 | FileCheck --check-prefix=CHECK9 %s // RUN: llvm-objdump --no-print-imm-hex -d %t2 --start-address=0x4100000 --stop-address=0x410000c --triple=armv7a-linux-gnueabihf | FileCheck --check-prefix=CHECK10 %s // RUN: llvm-objdump --no-print-imm-hex -d %t2 --start-address=0x4200000 --stop-address=0x4200008 | FileCheck --check-prefix=CHECK11 %s // Test the Range extension Thunks for ARM and Thumb when all the code is in a // single OutputSection. The ARM branches and branch and link instructions // have a range of 32Mb, the Thumb unconditional branch and // branch and link instructions have . 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 ARMFUNCTION suff .section .text.\suff\(), "ax", %progbits .arm .balign 0x100000 .globl afunc\suff\() .type afunc\suff\(), %function afunc\suff\(): bx lr .endm // Define a function aligned on a megabyte boundary .macro THUMBFUNCTION 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: ARMFUNCTION 00 // Expect ARM bl to be in range (can use blx to change state) bl tfunc31 // ARM b and beq are in range but need Thunk to change state to Thumb b tfunc31 beq tfunc31 // afunc32 is out of range of ARM branch and branch and link bl afunc32 b afunc32 bne afunc32 // CHECK1: : // CHECK1-NEXT: 100000: e12fff1e bx lr // CHECK1-NEXT: 100004: fa7bfffd blx 0x2000000 // CHECK1-NEXT: 100008: ea3bfffd b 0x1000004 <__ARMv7ABSLongThunk_tfunc31> // CHECK1-NEXT: 10000c: 0a3bfffc beq 0x1000004 <__ARMv7ABSLongThunk_tfunc31> // CHECK1-NEXT: 100010: eb7ffffa bl 0x2100000 // CHECK1-NEXT: 100014: ea7ffff9 b 0x2100000 // CHECK1-NEXT: 100018: 1a7ffff8 bne 0x2100000 THUMBFUNCTION 01 // Expect Thumb bl to be in range (can use blx to change state) bl afunc14 // In range but need thunk to change state to Thumb b.w afunc14 // CHECK2: : // CHECK2-NEXT: 200000: 4770 bx lr // CHECK2-NEXT: 200002: f0ff c7fe blx 0xf00000 // CHECK2-NEXT: 200006: f200 9003 b.w 0x1000010 <__Thumbv7ABSLongThunk_afunc14> ARMFUNCTION 02 THUMBFUNCTION 03 ARMFUNCTION 04 THUMBFUNCTION 05 ARMFUNCTION 06 THUMBFUNCTION 07 ARMFUNCTION 08 THUMBFUNCTION 09 ARMFUNCTION 10 THUMBFUNCTION 11 ARMFUNCTION 12 THUMBFUNCTION 13 ARMFUNCTION 14 // CHECK3: <__ARMv7ABSLongThunk_tfunc31>: // CHECK3-NEXT: 1000004: e300c001 movw r12, #1 // CHECK3-NEXT: 1000008: e340c200 movt r12, #512 // CHECK3-NEXT: 100000c: e12fff1c bx r12 // CHECK4: <__Thumbv7ABSLongThunk_afunc14>: // CHECK4-NEXT: 1000010: f240 0c00 movw r12, #0 // CHECK4-NEXT: 1000014: f2c0 0cf0 movt r12, #240 // CHECK4-NEXT: 1000018: 4760 bx r12 THUMBFUNCTION 15 ARMFUNCTION 16 THUMBFUNCTION 17 ARMFUNCTION 18 THUMBFUNCTION 19 ARMFUNCTION 20 THUMBFUNCTION 21 ARMFUNCTION 22 THUMBFUNCTION 23 ARMFUNCTION 24 THUMBFUNCTION 25 ARMFUNCTION 26 THUMBFUNCTION 27 ARMFUNCTION 28 THUMBFUNCTION 29 ARMFUNCTION 30 // Expect precreated Thunk Section here // CHECK5: <__Thumbv7ABSLongThunk_afunc00>: // CHECK5-NEXT: 1f00004: f240 0c00 movw r12, #0 // CHECK5-NEXT: 1f00008: f2c0 0c10 movt r12, #16 // CHECK5-NEXT: 1f0000c: 4760 bx r12 THUMBFUNCTION 31 ARMFUNCTION 32 THUMBFUNCTION 33 // Out of range, can only reach closest Thunk Section bl afunc00 // CHECK6: : // CHECK6-NEXT: 2200000: 4770 bx lr // CHECK6-NEXT: 2200002: f4ff ffff bl 0x1f00004 <__Thumbv7ABSLongThunk_afunc00> ARMFUNCTION 34 // Out of range, can reach earlier Thunk Section // CHECK7: : // CHECK7-NEXT: 2300000: e12fff1e bx lr // CHECK7-NEXT: 2300004: faeffffe blx 0x1f00004 <__Thumbv7ABSLongThunk_afunc00> bl afunc00 THUMBFUNCTION 35 ARMFUNCTION 36 THUMBFUNCTION 37 ARMFUNCTION 38 THUMBFUNCTION 39 ARMFUNCTION 40 THUMBFUNCTION 41 ARMFUNCTION 42 THUMBFUNCTION 43 ARMFUNCTION 44 THUMBFUNCTION 45 // Expect precreated Thunk Section here // CHECK8: <__ARMv7ABSLongThunk_tfunc35>: // CHECK8-NEXT: 2e00004: e300c001 movw r12, #1 // CHECK8-NEXT: 2e00008: e340c240 movt r12, #576 // CHECK8-NEXT: 2e0000c: e12fff1c bx r12 ARMFUNCTION 46 THUMBFUNCTION 47 ARMFUNCTION 48 THUMBFUNCTION 49 ARMFUNCTION 50 // Expect precreated Thunk Section here // CHECK9: <__Thumbv7ABSLongThunk_afunc34>: // CHECK9-NEXT: 3300004: f240 0c00 movw r12, #0 // CHECK9-NEXT: 3300008: f2c0 2c30 movt r12, #560 // CHECK9-NEXT: 330000c: 4760 bx r12 // CHECK9: <__Thumbv7ABSLongThunk_tfunc35>: // CHECK9-NEXT: 330000e: f4ff 97f7 b.w 0x2400000 THUMBFUNCTION 51 ARMFUNCTION 52 THUMBFUNCTION 53 ARMFUNCTION 54 THUMBFUNCTION 55 ARMFUNCTION 56 THUMBFUNCTION 57 ARMFUNCTION 58 THUMBFUNCTION 59 ARMFUNCTION 60 THUMBFUNCTION 61 ARMFUNCTION 62 THUMBFUNCTION 63 ARMFUNCTION 64 // afunc34 is in range, as is tfunc35 but a branch needs a state change Thunk bl afunc34 b tfunc35 // CHECK10: : // CHECK10-NEXT: 4100000: e12fff1e bx lr // CHECK10-NEXT: 4100004: eb87fffd bl 0x2300000 // CHECK10-NEXT: 4100008: eab3fffd b 0x2e00004 <__ARMv7ABSLongThunk_tfunc35> THUMBFUNCTION 65 // afunc34 and tfunc35 are both out of range bl afunc34 bl tfunc35 // CHECK11: : // CHECK11: 4200000: 4770 bx lr // CHECK11-NEXT: 4200002: f4ff d7ff bl 0x3300004 <__Thumbv7ABSLongThunk_afunc34> // CHECK11-NEXT: 4200006: f500 d002 bl 0x330000e <__Thumbv7ABSLongThunk_tfunc35>