| Message ID | 20241018095743.2955017-1-yury.khrustalev@arm.com |
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| State | New |
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From: Yury Khrustalev <yury.khrustalev@arm.com>
To: <libc-alpha@sourceware.org>
CC: <fweimer@redhat.com>, <codonell@redhat.com>, <nsz@gcc.gnu.org>,
<adhemerval.zanella@linaro.org>, Szabolcs Nagy <szabolcs.nagy@arm.com>
Subject: [RFC v2 01/22] aarch64: Add HWCAP_GCS
Date: Fri, 18 Oct 2024 10:57:43 +0100
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aarch64: Add support for Guarded Control Stack extension
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* Yury Khrustalev: > From: Szabolcs Nagy <szabolcs.nagy@arm.com> > > Use upper 32 bits of HWCAP. > --- > sysdeps/unix/sysv/linux/aarch64/bits/hwcap.h | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/sysdeps/unix/sysv/linux/aarch64/bits/hwcap.h b/sysdeps/unix/sysv/linux/aarch64/bits/hwcap.h > index 8dceaa1a52..9c4f4f46d1 100644 > --- a/sysdeps/unix/sysv/linux/aarch64/bits/hwcap.h > +++ b/sysdeps/unix/sysv/linux/aarch64/bits/hwcap.h > @@ -54,6 +54,7 @@ > #define HWCAP_SB (1 << 29) > #define HWCAP_PACA (1 << 30) > #define HWCAP_PACG (1UL << 31) > +#define HWCAP_GCS (1UL << 32) Is the out-of-tree ILP32 port still a thing? I haven't checked if it alters the prototype for getauxval, but this doesn't look quite compatible with it.
diff --git a/sysdeps/unix/sysv/linux/aarch64/bits/hwcap.h b/sysdeps/unix/sysv/linux/aarch64/bits/hwcap.h index 8dceaa1a52..9c4f4f46d1 100644 --- a/sysdeps/unix/sysv/linux/aarch64/bits/hwcap.h +++ b/sysdeps/unix/sysv/linux/aarch64/bits/hwcap.h @@ -54,6 +54,7 @@ #define HWCAP_SB (1 << 29) #define HWCAP_PACA (1 << 30) #define HWCAP_PACG (1UL << 31) +#define HWCAP_GCS (1UL << 32) #define HWCAP2_DCPODP (1 << 0) #define HWCAP2_SVE2 (1 << 1)
From: Szabolcs Nagy <szabolcs.nagy@arm.com> Use upper 32 bits of HWCAP. --- sysdeps/unix/sysv/linux/aarch64/bits/hwcap.h | 1 + 1 file changed, 1 insertion(+)