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
61 lines
2.1 KiB
ArmAsm
61 lines
2.1 KiB
ArmAsm
// REQUIRES: arm
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// RUN: llvm-mc -arm-add-build-attributes -filetype=obj -triple=thumbv7a-none-linux-gnueabi %s -o %t
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// RUN: ld.lld %t --shared -o %t.so
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// RUN: llvm-objdump -d --no-show-raw-insn --triple=thumbv7a-none-linux-gnueabi %t.so | FileCheck %s
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.syntax unified
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.global sym1
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.global elsewhere
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.weak weakref
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sym1:
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b.w elsewhere
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b.w weakref
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bl elsewhere
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bl weakref
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// Check that we generate a thunk for an undefined symbol called via a plt
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// entry.
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// CHECK: Disassembly of section .text:
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// CHECK-EMPTY:
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// CHECK-NEXT: <sym1>:
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// CHECK-NEXT: 101e0: b.w #12 <__ThumbV7PILongThunk_elsewhere>
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// CHECK-NEXT: b.w #20 <__ThumbV7PILongThunk_weakref>
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// CHECK-NEXT: blx #68
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// CHECK-NEXT: blx #80
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// CHECK: <__ThumbV7PILongThunk_elsewhere>:
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// CHECK-NEXT: 101f0: movw r12, #52
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// CHECK-NEXT: movt r12, #0
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// CHECK-NEXT: add r12, pc
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// CHECK-NEXT: bx r12
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// CHECK: <__ThumbV7PILongThunk_weakref>:
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// CHECK-NEXT: 101fc: movw r12, #56
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// CHECK-NEXT: movt r12, #0
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// CHECK-NEXT: add r12, pc
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// CHECK-NEXT: bx r12
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// CHECK: Disassembly of section .plt:
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// CHECK-EMPTY:
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// CHECK-NEXT: <$a>:
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// CHECK-NEXT: 10210: str lr, [sp, #-4]!
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// CHECK-NEXT: add lr, pc, #0, #12
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// CHECK-NEXT: add lr, lr, #32
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// CHECK-NEXT: ldr pc, [lr, #148]!
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// CHECK: <$d>:
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// CHECK-NEXT: 10220: d4 d4 d4 d4 .word 0xd4d4d4d4
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// CHECK-NEXT: .word 0xd4d4d4d4
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// CHECK-NEXT: .word 0xd4d4d4d4
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// CHECK-NEXT: .word 0xd4d4d4d4
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// CHECK: <$a>:
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// CHECK-NEXT: 10230: add r12, pc, #0, #12
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// CHECK-NEXT: add r12, r12, #32
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// CHECK-NEXT: ldr pc, [r12, #124]!
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// CHECK: <$d>:
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// CHECK-NEXT: 1023c: d4 d4 d4 d4 .word 0xd4d4d4d4
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// CHECK: <$a>:
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// CHECK-NEXT: 10240: add r12, pc, #0, #12
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// CHECK-NEXT: add r12, r12, #32
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// CHECK-NEXT: ldr pc, [r12, #112]!
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// CHECK: <$d>:
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// CHECK-NEXT: 1024c: d4 d4 d4 d4 .word 0xd4d4d4d4
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