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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
60 lines
2.0 KiB
ArmAsm
60 lines
2.0 KiB
ArmAsm
// REQUIRES: arm
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// RUN: llvm-mc -filetype=obj -triple=armv7a-none-linux-gnueabi %s -o %t
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// RUN: llvm-mc -filetype=obj -triple=armv7a-none-linux-gnueabi %S/Inputs/far-arm-abs.s -o %tfar
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// RUN: echo "SECTIONS { \
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// RUN: . = 0xb4; \
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// RUN: .callee1 : { *(.callee_low) } \
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// RUN: .caller : { *(.text) } \
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// RUN: .callee2 : { *(.callee_high) } } " > %t.script
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// RUN: ld.lld --script %t.script %t %tfar -o %t2
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// RUN: llvm-objdump -d --no-show-raw-insn --triple=armv7a-none-linux-gnueabi %t2 | FileCheck %s
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.syntax unified
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.section .callee_low, "ax",%progbits
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.align 2
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.type callee_low,%function
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callee_low:
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bx lr
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.section .text, "ax",%progbits
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.globl _start
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.balign 0x10000
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.type _start,%function
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_start:
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bl callee_low
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b callee_low
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beq callee_low
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bl callee_high
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b callee_high
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bne callee_high
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bl far
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b far
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bgt far
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bx lr
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.section .callee_high, "ax",%progbits
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.align 2
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.type callee_high,%function
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callee_high:
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bx lr
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// CHECK: 00010000 <_start>:
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/// S(callee_low) = 0xb4 P = 0x10000 A = -8 = -0xff54 = -65364
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// CHECK-NEXT: 10000: bl #-65364 <callee_low>
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/// S(callee_low) = 0xb4 P = 0x10004 A = -8 = -0xff58 = -65368
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// CHECK-NEXT: 10004: b #-65368 <callee_low>
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/// S(callee_low) = 0xb4 P = 0x10008 A = -8 = -0xff5c -65372
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// CHECK-NEXT: 10008: beq #-65372 <callee_low>
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/// S(callee_high) = 0x10028 P = 0x1000c A = -8 = 0x14 = 20
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// CHECK-NEXT: 1000c: bl #28 <callee_high>
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/// S(callee_high) = 0x10028 P = 0x10010 A = -8 = 0x10 = 16
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// CHECK-NEXT: 10010: b #24 <callee_high>
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/// S(callee_high) = 0x10028 P = 0x10014 A = -8 = 0x0c =12
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// CHECK-NEXT: 10014: bne #20 <callee_high>
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/// S(far) = 0x201001c P = 0x10018 A = -8 = 0x1fffffc = 33554428
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// CHECK-NEXT: 10018: bl #8
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/// S(far) = 0x201001c P = 0x1001c A = -8 = 0x1fffff8 = 33554424
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// CHECK-NEXT: 1001c: b #4
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/// S(far) = 0x201001c P = 0x10020 A = -8 = 0x1fffff4 = 33554420
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// CHECK-NEXT: 10020: bgt #0
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// CHECK-NEXT: 10024: bx lr
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