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>
28 lines
766 B
ArmAsm
28 lines
766 B
ArmAsm
# REQUIRES: systemz
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# RUN: llvm-mc -filetype=obj -triple=s390x-unknown-linux %p/Inputs/systemz-init.s -o systemz-init.o
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# RUN: llvm-mc -filetype=obj -triple=s390x-unknown-linux %s -o %t.o
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# RUN: ld.lld -dynamic-linker /lib/ld64.so.1 %t.o systemz-init.o -o %t
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# RUN: llvm-objdump -d --no-show-raw-insn -j .init %t | FileCheck %s
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# glibc < 2.39 used to align .init and .fini code at a 4-byte boundary.
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# When that happens, the linker must not pad the code with invalid
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# instructions, e.g. null bytes.
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.section .init,"ax",@progbits
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brasl %r14, startup
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# CHECK: <.init>:
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# CHECK-NEXT: brasl %r14,
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# CHECK-NEXT: bcr 0, %r7
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# CHECK-NEXT: lg %r4, 272(%r15)
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.text
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.globl startup
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.p2align 4
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startup:
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br %r14
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.globl main
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.p2align 4
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main:
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br %r14
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