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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>
62 lines
1.2 KiB
ArmAsm
62 lines
1.2 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 %t.o -o %t
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# RUN: llvm-readelf -r %t | FileCheck --check-prefix=NOREL %s
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# RUN: llvm-objdump -d --no-show-raw-insn %t | FileCheck --check-prefix=LE %s
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# RUN: llvm-objdump --section .data.rel.ro --full-contents %t | FileCheck --check-prefix=LE-DATA %s
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# NOREL: no relocations
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## TP offset for a is at 0x1002200
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# LE: lgrl %r1, 0x1002200
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# LE-NEXT: lgf %r1, 0(%r1,%r7)
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## TP offset for b is at 0x1002208
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# LE-NEXT: lgrl %r1, 0x1002208
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# LE-NEXT: lgf %r1, 0(%r1,%r7)
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## TP offset for c is at 0x1002210
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# LE-NEXT: lgrl %r1, 0x1002210
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# LE-NEXT: lgf %r1, 0(%r1,%r7)
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## TP offsets:
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# a: -8
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# b: -4
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# c: 0
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# LE-DATA: 1002200 ffffffff fffffff8 ffffffff fffffffc
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# LE-DATA: 1002210 00000000 00000000
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ear %r7,%a0
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sllg %r7,%r1,32
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ear %r7,%a1
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lgrl %r1, .LC0
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lgf %r1,0(%r1,%r7)
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lgrl %r1, .LC1
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lgf %r1,0(%r1,%r7)
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lgrl %r1, .LC2
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lgf %r1,0(%r1,%r7)
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.section .data.rel.ro,"aw"
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.align 8
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.LC0:
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.quad a@ntpoff
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.LC1:
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.quad b@ntpoff
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.LC2:
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.quad c@ntpoff
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.section .tbss
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.globl a
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.globl b
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.globl c
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.zero 8
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a:
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.zero 4
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b:
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.zero 4
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c:
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