mirror of
https://github.com/c64scene-ar/llvm-6502.git
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d7802bf0dd
on 64-bit PowerPC ELF. The patch includes code to handle external assembly and MC output with the integrated assembler. It intentionally does not support the "old" JIT. For the initial-exec TLS model, the ABI requires the following to calculate the address of external thread-local variable x: Code sequence Relocation Symbol ld 9,x@got@tprel(2) R_PPC64_GOT_TPREL16_DS x add 9,9,x@tls R_PPC64_TLS x The register 9 is arbitrary here. The linker will replace x@got@tprel with the offset relative to the thread pointer to the generated GOT entry for symbol x. It will replace x@tls with the thread-pointer register (13). The two test cases verify correct assembly output and relocation output as just described. PowerPC-specific selection node variants are added for the two instructions above: LD_GOT_TPREL and ADD_TLS. These are inserted when an initial-exec global variable is encountered by PPCTargetLowering::LowerGlobalTLSAddress(), and later lowered to machine instructions LDgotTPREL and ADD8TLS. LDgotTPREL is a pseudo that uses the same LDrs support added for medium code model's LDtocL, with a different relocation type. The rest of the processing is straightforward. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169281 91177308-0d34-0410-b5e6-96231b3b80d8
33 lines
981 B
LLVM
33 lines
981 B
LLVM
; RUN: llc -mcpu=pwr7 -O0 -filetype=obj %s -o - | \
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; RUN: elf-dump --dump-section-data | FileCheck %s
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; Test correct relocation generation for thread-local storage
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; using the initial-exec model and integrated assembly.
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target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-f128:128:128-v128:128:128-n32:64"
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target triple = "powerpc64-unknown-linux-gnu"
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@a = external thread_local global i32
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define signext i32 @main() nounwind {
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entry:
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%retval = alloca i32, align 4
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store i32 0, i32* %retval
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%0 = load i32* @a, align 4
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ret i32 %0
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}
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; Verify generation of R_PPC64_GOT_TPREL16_DS and R_PPC64_TLS for
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; accessing external variable a.
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;
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; CHECK: '.rela.text'
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; CHECK: Relocation 0
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; CHECK-NEXT: 'r_offset'
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; CHECK-NEXT: 'r_sym', 0x[[SYM1:[0-9a-f]+]]
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; CHECK-NEXT: 'r_type', 0x00000057
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; CHECK: Relocation 1
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; CHECK-NEXT: 'r_offset'
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; CHECK-NEXT: 'r_sym', 0x[[SYM1]]
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; CHECK-NEXT: 'r_type', 0x00000043
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