derek.holloway
7502bf64a4
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71 lines
2.7 KiB
ArmAsm
71 lines
2.7 KiB
ArmAsm
// REQUIRES: arm
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// RUN: llvm-mc -filetype=obj -triple=thumbv7-windows %s -o %t.obj
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// RUN: lld-link -entry:main -subsystem:console %t.obj -out:%t.exe -verbose 2>&1 | FileCheck -check-prefix=VERBOSE %s
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// RUN: llvm-objdump --no-print-imm-hex -d %t.exe --start-address=0x403000 --stop-address=0x403008 | FileCheck --check-prefix=FUNC01 %s
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// RUN: llvm-objdump --no-print-imm-hex -d %t.exe --start-address=0x404ffa --stop-address=0x405012 | FileCheck --check-prefix=FUNC01-THUNKS %s
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// VERBOSE: Added {{.*}} thunks with margin 204800 in 2 passes
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.syntax unified
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.globl main
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.text
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main:
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b func01
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bx lr
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.irp i, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14, 15, 16, 17, 18
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.section .text$\i\()a, "xr"
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.balign 8192
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func\i:
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bne far_func\i
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bne func_within_margin\i
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// Originally, the first section is less than 8192 bytes large, and the
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// second one follows almost directly. After adding one thunk after
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// the first section, the second one will move forward by 8192 bytes
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// due to the alignment.
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.space 8192 - 8 - 4
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.section .text$\i\()b, "xr"
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.balign 8192
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align\i:
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nop
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.endr
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.section .text$999, "xr"
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tail:
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.space 0x100000 - 100*1024 - 18*8192*2
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// Initially, these symbols are within range from all the sections above,
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// even when taking the initial margin into account. After adding thunks
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// to all the sections above, some of these are also out of range, forcing
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// running a second pass.
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.irp i, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14, 15, 16, 17, 18
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func_within_margin\i:
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nop
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.endr
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.space 0x100000
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// These are always out of range.
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.irp i, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14, 15, 16, 17, 18
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far_func\i:
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nop
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.endr
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bx lr
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// FUNC01: 403000: f041 87fc bne.w 0x404ffc <.text+0x3ffc>
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// FUNC01: 403004: f041 87ff bne.w 0x405006 <.text+0x4006>
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// Check that we only have two thunks here, even if we created the first
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// thunk twice (once in the first pass, then thrown away and recreated
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// in the second pass).
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// FUNC01-THUNKS: 404ffa: 0000 movs r0, r0
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// The instruction above is padding from the .space
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// FUNC01-THUNKS: 404ffc: f247 0c1e movw r12, #28702
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// FUNC01-THUNKS: 405000: f2c0 0c20 movt r12, #32
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// FUNC01-THUNKS: 405004: 44e7 add pc, r12
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// FUNC01-THUNKS: 405006: f646 7cf0 movw r12, #28656
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// FUNC01-THUNKS: 40500a: f2c0 0c10 movt r12, #16
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// FUNC01-THUNKS: 40500e: 44e7 add pc, r12
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// The instruction below is padding from the .balign
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// FUNC01-THUNKS: 405010: 0000 movs r0, r0
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