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Prepare ramdisks for outline atomics by providing a fake

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__aarch64_have_lse_atomics variable that avoids pulling in the CPU feature
detection code from libcompiler-rt that needs elf_aux_info(3).

ok deraadt@
This commit is contained in:
kettenis
2025-08-14 09:31:21 +00:00
parent 4c51a85a22
commit 9c7b56f8a1
2 changed files with 17 additions and 1 deletions
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6
distrib/special/libstubs/Makefile
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@@ -1,4 +1,4 @@
# $OpenBSD: Makefile,v 1.23 2025/08/11 17:16:18 gkoehler Exp $
# $OpenBSD: Makefile,v 1.24 2025/08/14 09:31:21 kettenis Exp $
.include <bsd.own.mk>
LIB= stubs
@@ -26,6 +26,10 @@ SRCS+= asr.c \
res_send_async.c \
sethostent.c
.if ${MACHINE_ARCH} == "aarch64"
SRCS+= aarch64_lse.c
.endif
NOPIC= Yes
NOPROFILE=Yes

12
distrib/special/libstubs/aarch64_lse.c Normal file
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@@ -0,0 +1,12 @@
/* $OpenBSD: aarch64_lse.c,v 1.1 2025/08/14 09:31:21 kettenis Exp $ */
/* Public domain */
/*
* The CPU feature detection code from libcompiler-rt uses
* elf_aux_info(3) which isn't available. To prevent pulling in that
* code, define a fake __aarch64_have_lse_atomics variable here.
* Since LL/SC atomics are good enough for ramdisks, the default
* initialization to false will work just fine on all machines.
*/
_Bool __aarch64_have_lse_atomics;