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Summary: In Secure PLT ABI, -fpic is similar to -fPIC. The differences are that: * -fpic stores the address of _GLOBAL_OFFSET_TABLE_ in r30, while -fPIC stores .got2+0x8000. * -fpic uses an addend of 0 for R_PPC_PLTREL24, while -fPIC uses 0x8000. Reviewers: hfinkel, jhibbits, joerg, nemanjai, spetrovic Reviewed By: jhibbits Subscribers: adalava, kbarton, jsji, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D63563 llvm-svn: 364324
31 lines
1.1 KiB
LLVM
31 lines
1.1 KiB
LLVM
; RUN: llc < %s -mtriple=powerpc -relocation-model=pic | \
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; RUN: FileCheck -check-prefixes=SMALL,SMALL-BSS %s
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; RUN: llc < %s -mtriple=powerpc -relocation-model=pic -mattr=+secure-plt | \
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; RUN: FileCheck -check-prefixes=SMALL,SMALL-SECUREPLT %s
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@bar = common global i32 0, align 4
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declare i32 @call_foo(i32, ...)
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define i32 @foo() {
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entry:
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%0 = load i32, i32* @bar, align 4
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%call = call i32 (i32, ...) @call_foo(i32 %0, i32 0, i32 1, i32 2, i32 4, i32 8, i32 16, i32 32, i32 64)
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ret i32 0
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}
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!llvm.module.flags = !{!0}
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!0 = !{i32 1, !"PIC Level", i32 1}
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; SMALL-LABEL: foo:
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; SMALL: stwu 1, -32(1)
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; SMALL: stw 30, 24(1)
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; SMALL-BSS: bl _GLOBAL_OFFSET_TABLE_@local-4
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; SMALL-SECURE: bl .L0$pb
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; SMALL: mflr 30
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; SMALL-SECURE: addis 30, 30, _GLOBAL_OFFSET_TABLE_-.Lo$pb@ha
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; SMALL-SECURE: addi 30, 30, _GLOBAL_OFFSET_TABLE_-.Lo$pb@l
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; SMALL-DAG: stw {{[0-9]+}}, 8(1)
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; SMALL-DAG: lwz [[VREG:[0-9]+]], bar@GOT(30)
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; SMALL-DAG: lwz {{[0-9]+}}, 0([[VREG]])
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; SMALL: bl call_foo@PLT{{$}}
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; SMALL: lwz 30, 24(1)
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