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
1.2 KiB
ArmAsm
42 lines
1.2 KiB
ArmAsm
// REQUIRES: arm
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// RUN: llvm-mc -arm-add-build-attributes -filetype=obj -triple=armv7a-none-linux-gnueabi %s -o %t
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// RUN: ld.lld --image-base=0x10000000 %t -o %t2
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// RUN: llvm-objdump --triple=armv7a-none-linux-gnueabi --no-show-raw-insn -d %t2 | FileCheck %s
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/// Check that the ARM ABI rules for undefined weak symbols are applied.
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/// Branch instructions are resolved to the next instruction. Undefined
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/// Symbols in relative are resolved to the place so S - P + A = A.
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/// We place the image-base at 0x10000000 to test that a range extensions thunk
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/// is not generated.
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.syntax unified
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.weak target
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.type target, %function
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.text
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.global _start
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_start:
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/// R_ARM_JUMP24
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b target
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/// R_ARM_CALL
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bl target
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/// R_ARM_CALL with exchange
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blx target
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/// R_ARM_MOVT_PREL
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movt r0, :upper16:target - .
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/// R_ARM_MOVW_PREL_NC
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movw r0, :lower16:target - .
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/// R_ARM_REL32
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.word target - .
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// CHECK: Disassembly of section .text:
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// CHECK-EMPTY:
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// CHECK-NEXT: 100100b4 <_start>:
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// CHECK-NEXT: 100100b4: b #-4
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// CHECK-NEXT: 100100b8: bl #-4
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// CHECK-NEXT: 100100bc: bl #-4
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// CHECK-NEXT: 100100c0: movt r0, #0
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// CHECK-NEXT: 100100c4: movw r0, #0
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// CHECK: 100100c8: 00 00 00 00 .word 0x00000000
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