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
28 lines
1.1 KiB
ArmAsm
28 lines
1.1 KiB
ArmAsm
// REQUIRES: aarch64
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// RUN: llvm-mc -filetype=obj -triple=aarch64-unknown-freebsd %s -o %t.o
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// RUN: ld.lld %t.o -o %t.so -shared
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// RUN: llvm-readobj -r %t.so | FileCheck %s
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.p2align 4
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adr x8, .Lfoo // R_AARCH64_ADR_PREL_LO21
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adrp x8, .Lfoo // R_AARCH64_ADR_PREL_PG_HI21
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strb w9, [x8, :lo12:.Lfoo] // R_AARCH64_LDST8_ABS_LO12_NC
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ldr h17, [x19, :lo12:.Lfoo] // R_AARCH64_LDST16_ABS_LO12_NC
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ldr w0, [x8, :lo12:.Lfoo] // R_AARCH64_LDST32_ABS_LO12_NC
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ldr x0, [x8, :lo12:.Lfoo] // R_AARCH64_LDST64_ABS_LO12_NC
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ldr q20, [x19, #:lo12:.Lfoo] // R_AARCH64_LDST128_ABS_LO12_NC
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add x0, x0, :lo12:.Lfoo // R_AARCH64_ADD_ABS_LO12_NC
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bl .Lfoo // R_AARCH64_CALL26
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b .Lfoo // R_AARCH64_JUMP26
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beq .Lfoo // R_AARCH64_CONDBR19
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.Lbranch:
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tbz x1, 7, .Lbranch // R_AARCH64_TSTBR14
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.data
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.Lfoo:
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.rodata
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.long .Lfoo - .
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.xword .Lfoo - . // R_AARCH64_PREL64
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// CHECK: Relocations [
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// CHECK-NEXT: ]
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