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71 lines
1.9 KiB
71 lines
1.9 KiB
// An example of thunk generation that takes the maximum number of permitted
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// passes to converge. We start with a set of branches of which all but one are
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// in range. Any thunk added to extend the range of a branch is inserted in
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// between the branches and the targets which knocks some more branches out
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// of range. At the end of 9 passes of createThunks() every branch has a
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// range extension thunk, allowing the final pass to check that no more thunks
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// are required.
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//
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// As the size of the .text section changes 9 times, the symbol sym which
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// depends on the size of .text will be updated 9 times. This test checks that
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// any iteration limit to updating symbols does not limit thunk convergence.
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// up to its pass limit without
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.thumb
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.section .text.00, "ax", %progbits
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.globl _start
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.thumb_func
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_start: b.w f2
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b.w f2
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b.w f3
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b.w f3
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b.w f4
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b.w f4
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b.w f5
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b.w f5
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b.w f6
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b.w f6
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b.w f7
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b.w f7
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b.w f8
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b.w f8
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b.w f9
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b.w f9
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b.w f10
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b.w f10
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.section .text.01, "ax", %progbits
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.space 14 * 1024 * 1024
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// Thunks are inserted here, initially only 1 branch is out of range and needs
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// a thunk. However the added thunk is 4-bytes in size which makes another
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// branch out of range, which adds another thunk ...
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.section .text.02, "ax", %progbits
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.space (2 * 1024 * 1024) - 68
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.thumb_func
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f2: bx lr
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nop
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.thumb_func
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f3: bx lr
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nop
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.thumb_func
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f4: bx lr
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nop
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.thumb_func
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f5: bx lr
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nop
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.thumb_func
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f6: bx lr
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nop
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.thumb_func
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f7: bx lr
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nop
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.thumb_func
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f8: bx lr
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nop
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.thumb_func
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f9: bx lr
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nop
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.thumb_func
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f10: bx lr
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nop
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