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- # thumb_blx_out_of_range.s
- # Test THUMB/THUMB-2 blx instructions just out of the branch range limits.
- .syntax unified
- .section .text.pre,"x"
- # Add padding so that target is just output of branch range.
- .space 4
- .global _forward_target
- .global _backward_target
- .type _backword_target, %function
- _backward_target:
- bx lr
- .size _backward_target, .-_backward_target
-
- .text
- # Use 256-byte alignment so that we know where the stubs start.
- .align 8
- # Define _start so that linker does not complain.
- .align 2
- .global _start
- .code 32
- .type _start, %function
- _start:
- bx lr
- .size _start, .-_start
- .global _backward_test
- .code 16
- .thumb_func
- .type _backward_test, %function
- _backward_test:
- bl _backward_target
- .size _backward_test, .-_backward_test
- .align 2
- .global _forward_test
- .code 16
- .thumb_func
- .type _forward_test, %function
- _forward_test:
- # Bit 1 of the BLX target comes from bit 1 of branch base address,
- # which is BLX instruction's address + 4. We intentionally put this
- # forward BLX at an address n*4 + 2 so that the branch offset is
- # bumped up by 2.
- nop.n
- bl _forward_target
- .size _forward_test, .-_forward_test
- # switch back to ARM mode so that stubs are disassembled correctly.
- .align 2
- .code 32
-
- # Align stub table for address matching.
- .align 8
- .section .text.post,"x"
- # Add padding so that target is just out of branch range.
- .space 12
- .align 2
- .code 32
- .global _forward_target
- .type _forward_target, %function
- _forward_target:
- bx lr
- .size _forward_target, .-_forward_target
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