85197a0842
PPC64 maintains a compiler managed got in the .toc section. When accessing a global variable through got-indirect access, a .toc entry is created for the variable. The relocation for the got-indirect access will refer to the .toc section rather than the symbol that is actually accessed. The .toc entry contains the address of the global variable. We evaluate the offset from r2 (which is the TOC base) to the address of the toc entry for the global variable. Currently, the .toc is not near the .got. This causes errors because the offset from r2 to the toc section is too large. The linker needs to add all the .toc input sections to the .got output section, merging the compiler managed got with the linker got. This ensures that the offsets from the TOC base to the toc entries are not too large. This patch puts the .toc section right after the .got section. Differential Revision: https://reviews.llvm.org/D45833 llvm-svn: 333199
81 lines
2.4 KiB
ArmAsm
81 lines
2.4 KiB
ArmAsm
// REQUIRES: ppc
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// RUN: llvm-mc -filetype=obj -triple=powerpc64le-unknown-linux %s -o %t.o
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// RUN: llvm-mc -filetype=obj -triple=powerpc64le-unknown-linux %p/Inputs/ppc64-func-global-entry.s -o %t2.o
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// RUN: llvm-mc -filetype=obj -triple=powerpc64le-unknown-linux %p/Inputs/ppc64-func-local-entry.s -o %t3.o
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// RUN: ld.lld -dynamic-linker /lib64/ld64.so.2 %t.o %t2.o %t3.o -o %t
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// RUN: llvm-objdump -d %t | FileCheck %s
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// RUN: llvm-mc -filetype=obj -triple=powerpc64-unknown-linux %s -o %t.o
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// RUN: llvm-mc -filetype=obj -triple=powerpc64-unknown-linux %p/Inputs/ppc64-func-global-entry.s -o %t2.o
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// RUN: llvm-mc -filetype=obj -triple=powerpc64-unknown-linux %p/Inputs/ppc64-func-local-entry.s -o %t3.o
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// RUN: ld.lld -dynamic-linker /lib64/ld64.so.2 %t.o %t2.o %t3.o -o %t
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// RUN: llvm-objdump -d %t | FileCheck %s
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.text
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.abiversion 2
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.globl _start # -- Begin function _start
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.p2align 4
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.type _start,@function
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_start: # @_start
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.Lfunc_begin0:
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.Lfunc_gep0:
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addis 2, 12, .TOC.-.Lfunc_gep0@ha
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addi 2, 2, .TOC.-.Lfunc_gep0@l
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.Lfunc_lep0:
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.localentry _start, .Lfunc_lep0-.Lfunc_gep0
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# %bb.0: # %entry
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mflr 0
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std 0, 16(1)
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stdu 1, -48(1)
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li 3, 1
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li 4, 1
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std 30, 32(1) # 8-byte Folded Spill
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bl foo_external_same
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nop
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mr 30, 3
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li 3, 2
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li 4, 2
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bl foo_external_diff
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nop
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addis 4, 2, .LC0@toc@ha
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add 3, 3, 30
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ld 30, 32(1) # 8-byte Folded Reload
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ld 4, .LC0@toc@l(4)
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lwz 4, 0(4)
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add 3, 3, 4
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extsw 3, 3
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addi 1, 1, 48
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ld 0, 16(1)
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li 0, 1
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sc
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.long 0
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.quad 0
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.Lfunc_end0:
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.size _start, .Lfunc_end0-.Lfunc_begin0
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# -- End function
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.section .toc,"aw",@progbits
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.LC0:
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.tc glob[TC],glob
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.type glob,@object # @glob
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.data
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.globl glob
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.p2align 2
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glob:
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.long 10 # 0xa
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.size glob, 4
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# Check that foo_external_diff has a global entry point and we branch to
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# foo_external_diff+8. Also check that foo_external_same has no global entry
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# point and we branch to start of foo_external_same.
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// CHECK: _start:
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// CHECK: 10010020: {{.*}} bl .+144
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// CHECK: 10010034: {{.*}} bl .+84
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// CHECK: foo_external_diff:
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// CHECK-NEXT: 10010080: {{.*}} addis 2, 12, 2
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// CHECK-NEXT: 10010084: {{.*}} addi 2, 2, 32640
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// CHECK-NEXT: 10010088: {{.*}} addis 5, 2, 0
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// CHECK: foo_external_same:
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// CHECK-NEXT: 100100b0: {{.*}} add 3, 4, 3
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