6ef767c075
LLVM currently emits `.note.GNU-stack` sections on all ELF targets. However, Solaris ld doesn't know/care about them. Even worse, with the revised Solaris GNU ld patch (D85309 <https://reviews.llvm.org/D85309>), there are hundreds of warnings: /usr/gnu/bin/ld: warning: /usr/lib/amd64/crtn.o: missing .note.GNU-stack section implies executable stack /usr/gnu/bin/ld: NOTE: This behaviour is deprecated and will be removed in a future version of the linker The Solaris crts are not going to change here, and even if they were, GNU ld would emit `PT_GNU_STACK` segments that Solaris `ld.so.1` ignores. So the note sections are completely useless on Solaris and this patch disables their creation. Instead, Solaris has its own mechanisms to control stack executability: `PT_SUNW_STACK`, `DT_SUNW_SX_NXSTACK` and the system-wide control via `sxadm` where `nxstack` defaults to on. Tested on `amd64-pc-solaris2.11` and `sparcv9-sun-solaris2.11` with Solaris ld and GNU ld, and `x86_64-pc-linux-gnu`. Differential Revision: https://reviews.llvm.org/D159179
10 lines
536 B
LLVM
10 lines
536 B
LLVM
;; Check that .note.GNU-stack sections are emitted on Linux, but not on Solaris.
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; RUN: llc < %s -mtriple=i686-linux | FileCheck %s -check-prefix=CHECK-GNUSTACK
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; RUN: llc < %s -mtriple=x86_64-linux | FileCheck %s -check-prefix=CHECK-GNUSTACK
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; RUN: llc < %s -mtriple=i386-solaris | FileCheck %s -check-prefix=CHECK-NOGNUSTACK
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; RUN: llc < %s -mtriple=amd64-solaris | FileCheck %s -check-prefix=CHECK-NOGNUSTACK
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; CHECK-GNUSTACK: .section ".note.GNU-stack","",@progbits
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; CHECK-NOGNUSTACK-NOT: .section ".note.GNU-stack","",@progbits
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