87383e408d
See http://lists.llvm.org/pipermail/llvm-dev/2020-April/140549.html For the record, GNU ld changed to 64k max page size in 2014 https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=7572ca8989ead4c3425a1500bc241eaaeffa2c89 "[RFC] ld/ARM: Increase maximum page size to 64kB" Android driver forced 4k page size in AArch64 (D55029) and ARM (D77746). A binary linked with max-page-size=4096 does not run on a system with a higher page size configured. There are some systems out there that do this and it leads to the binary getting `Killed!` by the kernel. In the non-linker-script cases, when linked with -z noseparate-code (default), the max-page-size increase should not cause any size difference. There may be some VMA usage differences, though. Reviewed By: psmith, MaskRay Differential Revision: https://reviews.llvm.org/D77330
42 lines
1.1 KiB
ArmAsm
42 lines
1.1 KiB
ArmAsm
// REQUIRES: arm
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// RUN: llvm-mc -filetype=obj -triple=armv7a-linux-gnueabihf --arm-add-build-attributes %s -o %t.o
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// RUN: ld.lld --fix-cortex-a8 --shared %t.o -o %t2
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// RUN: llvm-objdump -d --no-show-raw-insn %t2 | FileCheck %s
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/// Test case that for an OutputSection larger than the ThunkSectionSpacing
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/// --fix-cortex-a8 will cause the size of the ThunkSection to be rounded up to
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/// the nearest 4KiB
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.thumb
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.section .text.01, "ax", %progbits
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.balign 4096
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.globl _start
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.type _start, %function
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_start:
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/// state change thunk required
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b.w arm_func
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thumb_target:
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.space 4096 - 10
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/// erratum patch needed
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nop.w
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b.w thumb_target
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/// Expect thunk and patch to be inserted here
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// CHECK: 00012004 <__ThumbV7PILongThunk_arm_func>:
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// CHECK-NEXT: 12004: movw r12, #4088
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// CHECK-NEXT: movt r12, #256
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// CHECK-NEXT: add r12, pc
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// CHECK-NEXT: bx r12
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// CHECK: 00013004 <__CortexA8657417_11FFE>:
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// CHECK-NEXT: 13004: b.w #-8196
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.section .text.02
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/// Take us over thunk section spacing
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.space 16 * 1024 * 1024
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.section .text.03, "ax", %progbits
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.arm
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.balign 4
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.type arm_func, %function
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arm_func:
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bx lr
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