d7fd8b19e5
- Add support for `.openbsd.mutable` (rebaser's note) adapted from:bd249b5664New auto-coalescing sections removed In the linkers, collect objects in section "openbsd.mutable" and place them into a page-aligned region in the bss, with the right markers for kernel/ld.so to identify the region and skip making it immutable. While here, fix readelf/objdump versions to show all of this. ok miod kettenis - Add support for `.openbsd.syscalls` (rebaser's note) adapted from:42a61acefaCollect .openbsd.syscalls sections into a new PT_OPENBSD_SYSCALLS segment. This will be used soon to pin system calls to designated call sites. ok deraadt@ - Scope OpenBSD special section handling under that ELFOSABI As a preexisting comment in `ELF/Writer.cpp` says: > section names shouldn't be significant in ELF in spirit. so scoping OSABI-specific magic name hacks to just the OSABI in question limits the degree to which we deviate from that "spirit" for all other OSABIs. OpenBSD in particular is very fast moving, having added a number of special sections, etc. in recent years. It is unclear how possible / reasonable it is for upstream to implement all these features in any event, but scoping like this at least mitigates the fallout for other OSABIs systems which wish to be more slow-moving. Co-authored-by: deraadt <deraadt@openbsd.org>
47 lines
1.2 KiB
ArmAsm
47 lines
1.2 KiB
ArmAsm
// REQUIRES: x86
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// RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t.o
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// RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %p/Inputs/shared.s -o %t2.o
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// RUN: ld.lld -shared %t2.o -o %t2.so
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// RUN: ld.lld %t.o %t2.so -z now -z norelro -z relro -o %t
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// RUN: llvm-readelf -l %t | FileCheck --check-prefix=CHECK --check-prefix=FULLRELRO %s
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// RUN: ld.lld %t.o %t2.so -z norelro -z relro -o %t
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// RUN: llvm-readelf -l %t | FileCheck --check-prefix=CHECK --check-prefix=PARTRELRO %s
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// RUN: ld.lld %t.o %t2.so -z norelro -o %t
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// RUN: llvm-readelf -l %t | FileCheck --check-prefix=NORELRO %s
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// CHECK: Program Headers:
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// CHECK-NEXT: Type
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// CHECK-NEXT: PHDR
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// CHECK-NEXT: LOAD
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// CHECK-NEXT: LOAD
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// CHECK-NEXT: LOAD
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// CHECK-NEXT: LOAD
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// CHECK-NEXT: DYNAMIC
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// CHECK-NEXT: GNU_RELRO
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// CHECK: Section to Segment mapping:
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// FULLRELRO: 03 .data.rel.ro .dynamic .got .got.plt .relro_padding {{$}}
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// PARTRELRO: 03 .data.rel.ro .dynamic .got .relro_padding {{$}}
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// NORELRO-NOT: GNU_RELRO
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.global _start
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_start:
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.long bar
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jmp *bar2@GOTPCREL(%rip)
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.section .data,"aw"
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.quad 0
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.zero 4
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.section .foo,"aw"
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.section .bss,"",@nobits
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.section .data.rel.ro, "aw"
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.quad 0
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