fe3406e349
This patch adds full support for linking SystemZ (ELF s390x) object files. Support should be generally complete: - All relocation types are supported. - Full shared library support (DYNAMIC, GOT, PLT, ifunc). - Relaxation of TLS and GOT relocations where appropriate. - Platform-specific test cases. In addition to new platform code and the obvious changes, there were a few additional changes to common code: - Add three new RelExpr members (R_GOTPLT_OFF, R_GOTPLT_PC, and R_PLT_GOTREL) needed to support certain s390x relocations. I chose not to use a platform-specific name since nothing in the definition of these relocs is actually platform-specific; it is well possible that other platforms will need the same. - A couple of tweaks to TLS relocation handling, as the particular semantics of the s390x versions differ slightly. See comments in the code. This was tested by building and testing >1500 Fedora packages, with only a handful of failures; as these also have issues when building with LLD on other architectures, they seem unrelated. Co-authored-by: Tulio Magno Quites Machado Filho <tuliom@redhat.com>
30 lines
1.3 KiB
ArmAsm
30 lines
1.3 KiB
ArmAsm
# REQUIRES: systemz
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# RUN: llvm-mc -filetype=obj -triple=s390x-unknown-linux %s -o %t.o
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# RUN: ld.lld -m elf64_s390 %t.o -o %t1
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# RUN: llvm-readelf --file-header %t1 | FileCheck %s
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# RUN: ld.lld %t.o -o %t2
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# RUN: llvm-readelf --file-header %t2 | FileCheck %s
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# RUN: echo 'OUTPUT_FORMAT(elf64-s390)' > %t.script
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# RUN: ld.lld %t.script %t.o -o %t3
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# RUN: llvm-readelf --file-header %t3 | FileCheck %s
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# CHECK: ELF Header:
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# CHECK-NEXT: Magic: 7f 45 4c 46 02 02 01 00 00 00 00 00 00 00 00 00
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# CHECK-NEXT: Class: ELF64
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# CHECK-NEXT: Data: 2's complement, big endian
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# CHECK-NEXT: Version: 1 (current)
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# CHECK-NEXT: OS/ABI: UNIX - System V
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# CHECK-NEXT: ABI Version: 0
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# CHECK-NEXT: Type: EXEC (Executable file)
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# CHECK-NEXT: Machine: IBM S/390
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# CHECK-NEXT: Version: 0x1
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# CHECK-NEXT: Entry point address:
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# CHECK-NEXT: Start of program headers: 64 (bytes into file)
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# CHECK-NEXT: Start of section headers:
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# CHECK-NEXT: Flags: 0x0
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# CHECK-NEXT: Size of this header: 64 (bytes)
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# CHECK-NEXT: Size of program headers: 56 (bytes)
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.globl _start
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_start:
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