f66b767abe
Ported the D64906 technique to AArch64. It deletes 3 alignments at PT_LOAD boundaries for the default case: the size of an aarch64 binary decreases by at most 192kb. If `sh_addralign(.tdata) < sh_addralign(.tbss)`, we can potentially make `p_vaddr(PT_TLS)%p_align(PT_TLS) != 0`. ld.so that are known to have problems if p_vaddr%p_align!=0: * musl<=1.1.22 * FreeBSD 13.0-CURRENT (and before) rtld-elf arm64 New test aarch64-tls-vaddr-align.s checks that our workaround makes p_vaddr%p_align = 0. Reviewed By: ruiu Differential Revision: https://reviews.llvm.org/D64930 llvm-svn: 369344
67 lines
1.8 KiB
ArmAsm
67 lines
1.8 KiB
ArmAsm
// REQUIRES: arm, aarch64
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// RUN: llvm-mc -filetype=obj -triple=aarch64-none-linux-android %s -o %t.o
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// RUN: ld.lld -shared %t.o -o %t.so --pack-dyn-relocs=android -z norelro -z separate-code
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// RUN: llvm-readobj -S %t.so | FileCheck %s
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// This test is making sure the Android packed relocation support doesn't
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// cause an infinite loop due to the size of the section oscillating
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// (because the size of the section impacts the layout of the following
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// sections).
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// This test is very sensitive to the exact section sizes and offsets,
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// so check that they don't change.
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// CHECK: Name: .rela.dyn (33)
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// CHECK-NEXT: Type: SHT_ANDROID_RELA (0x60000002)
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// CHECK-NEXT: Flags [ (0x2)
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// CHECK-NEXT: SHF_ALLOC (0x2)
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// CHECK-NEXT: ]
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// CHECK-NEXT: Address: 0x1D8
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// CHECK-NEXT: Offset: 0x1D8
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// CHECK-NEXT: Size: 21
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// CHECK: Name: x (43)
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// CHECK-NEXT: Type: SHT_PROGBITS (0x1)
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// CHECK-NEXT: Flags [ (0x2)
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// CHECK-NEXT: SHF_ALLOC (0x2)
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// CHECK-NEXT: ]
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// CHECK-NEXT: Address: 0x1ED
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// CHECK-NEXT: Offset: 0x1ED
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// CHECK-NEXT: Size: 65036
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// CHECK: Name: barr (45)
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// CHECK-NEXT: Type: SHT_PROGBITS (0x1)
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// CHECK-NEXT: Flags [ (0x2)
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// CHECK-NEXT: SHF_ALLOC (0x2)
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// CHECK-NEXT: ]
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// CHECK-NEXT: Address: 0xFFFA
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// CHECK-NEXT: Offset: 0xFFFA
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// CHECK-NEXT: Size: 0
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// CHECK: Name: foo (62)
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// CHECK-NEXT: Type: SHT_PROGBITS (0x1)
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// CHECK-NEXT: Flags [ (0x3)
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// CHECK-NEXT: SHF_ALLOC (0x2)
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// CHECK-NEXT: SHF_WRITE (0x1)
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// CHECK-NEXT: ]
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// CHECK-NEXT: Address: 0x10004
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// CHECK-NEXT: Offset: 0x10004
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// CHECK-NEXT: Size: 24
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.data
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.long 0
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.section foo,"aw"
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foof:
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.quad foof
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.quad bar-53
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.quad bar
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.section x,"a"
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.zero 65036
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.section barr,"a"
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.p2align 1
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bar:
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