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
46 lines
1.4 KiB
ArmAsm
46 lines
1.4 KiB
ArmAsm
// REQUIRES: arm
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// RUN: llvm-mc -filetype=obj -arm-add-build-attributes -triple=armv7a-none-linux-gnueabi %s -o %t
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// RUN: ld.lld --hash-style=sysv %t --shared -o %t2
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// RUN: llvm-readobj --relocations %t2 | FileCheck %s
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// RUN: llvm-objdump -s --triple=armv7a-none-linux-gnueabi %t2 | FileCheck --check-prefix=CHECK-EXTAB-NEXT %s
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// Check that the relative R_ARM_PREL31 relocation can access a PLT entry
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// for when the personality routine is referenced from a shared library.
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// Also check that the R_ARM_NONE no-op relocation can be used in a shared
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// library.
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.syntax unified
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// Will produce an ARM.exidx entry with an R_ARM_NONE relocation to
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// __aeabi_unwind_cpp_pr0
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.section .text.func1, "ax",%progbits
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.global func1
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func1:
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.fnstart
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bx lr
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.fnend
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// Will produce a R_ARM_PREL31 relocation with respect to the PLT entry of
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// __gxx_personality_v0
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.section .text.func2, "ax",%progbits
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.global func2
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func2:
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.fnstart
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bx lr
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.personality __gxx_personality_v0
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.handlerdata
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.long 0
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.section .text.func2
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.fnend
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.section .text.__aeabi_unwind_cpp_pr0, "ax", %progbits
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.global __aeabi_unwind_cpp_pr0
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__aeabi_unwind_cpp_pr0:
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bx lr
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// CHECK: Relocations [
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// CHECK-NEXT: Section {{.*}} .rel.plt {
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// CHECK-NEXT: 0x302DC R_ARM_JUMP_SLOT __gxx_personality_v0
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// CHECK-EXTAB: Contents of section .ARM.extab:
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// 0x0238 + 0x1038 = 0x1270 = __gxx_personality_v0(PLT)
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// CHECK-EXTAB-NEXT: 0238 38000100 b0b0b000 00000000
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