| // REQUIRES: arm |
| // RUN: llvm-mc -filetype=obj -triple=thumbv7-windows %s -o %t.obj |
| // RUN: lld-link -entry:main -subsystem:console %t.obj -out:%t.exe -verbose 2>&1 | FileCheck -check-prefix=VERBOSE %s |
| // RUN: llvm-objdump -d %t.exe --start-address=0x403000 --stop-address=0x403008 | FileCheck --check-prefix=FUNC01 %s |
| // RUN: llvm-objdump -d %t.exe --start-address=0x404ffa --stop-address=0x405012 | FileCheck --check-prefix=FUNC01-THUNKS %s |
| |
| // VERBOSE: Added {{.*}} thunks with margin 204800 in 2 passes |
| |
| .syntax unified |
| .globl main |
| .text |
| main: |
| b func01 |
| bx lr |
| |
| .irp i, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14, 15, 16, 17, 18 |
| .section .text$\i\()a, "xr" |
| .balign 8192 |
| func\i: |
| bne far_func\i |
| bne func_within_margin\i |
| // Originally, the first section is less than 8192 bytes large, and the |
| // second one follows almost directly. After adding one thunk after |
| // the first section, the second one will move forward by 8192 bytes |
| // due to the alignment. |
| .space 8192 - 8 - 4 |
| |
| .section .text$\i\()b, "xr" |
| .balign 8192 |
| align\i: |
| nop |
| .endr |
| |
| .section .text$999, "xr" |
| tail: |
| .space 0x100000 - 100*1024 - 18*8192*2 |
| // Initially, these symbols are within range from all the sections above, |
| // even when taking the initial margin into account. After adding thunks |
| // to all the sections above, some of these are also out of range, forcing |
| // running a second pass. |
| .irp i, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14, 15, 16, 17, 18 |
| func_within_margin\i: |
| nop |
| .endr |
| .space 0x100000 |
| |
| // These are always out of range. |
| .irp i, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14, 15, 16, 17, 18 |
| far_func\i: |
| nop |
| .endr |
| bx lr |
| |
| // FUNC01: 403000: 41 f0 fc 87 bne.w 0x404ffc <.text+0x3ffc> |
| // FUNC01: 403004: 41 f0 ff 87 bne.w 0x405006 <.text+0x4006> |
| |
| // Check that we only have two thunks here, even if we created the first |
| // thunk twice (once in the first pass, then thrown away and recreated |
| // in the second pass). |
| |
| // FUNC01-THUNKS: 404ffa: 00 00 movs r0, r0 |
| // The instruction above is padding from the .space |
| // FUNC01-THUNKS: 404ffc: 47 f2 1e 0c movw r12, #28702 |
| // FUNC01-THUNKS: 405000: c0 f2 20 0c movt r12, #32 |
| // FUNC01-THUNKS: 405004: e7 44 add pc, r12 |
| // FUNC01-THUNKS: 405006: 46 f6 f0 7c movw r12, #28656 |
| // FUNC01-THUNKS: 40500a: c0 f2 10 0c movt r12, #16 |
| // FUNC01-THUNKS: 40500e: e7 44 add pc, r12 |
| // The instruction below is padding from the .balign |
| // FUNC01-THUNKS: 405010: cc cc ldm r4!, {r2, r3, r6, r7} |
