Date: Thu, 6 May 2021 09:33:36 GMT From: Edward Tomasz Napierala <trasz@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 916f3dba4523 - main - linux(4): make arch_prctl(2) support GET_CET_STATUS, report unknown codes Message-ID: <202105060933.1469XaJI040982@gitrepo.freebsd.org>
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The branch main has been updated by trasz: URL: https://cgit.FreeBSD.org/src/commit/?id=916f3dba4523d1b2d478538875d45df56b20bcdb commit 916f3dba4523d1b2d478538875d45df56b20bcdb Author: Edward Tomasz Napierala <trasz@FreeBSD.org> AuthorDate: 2021-05-06 08:33:35 +0000 Commit: Edward Tomasz Napierala <trasz@FreeBSD.org> CommitDate: 2021-05-06 08:33:42 +0000 linux(4): make arch_prctl(2) support GET_CET_STATUS, report unknown codes This is largely a no-op, to make future debugging slightly easier. Sponsored By: EPSRC Differential Revision: https://reviews.freebsd.org/D30035 --- sys/amd64/linux/linux.h | 1 + sys/amd64/linux/linux_machdep.c | 6 ++++++ 2 files changed, 7 insertions(+) diff --git a/sys/amd64/linux/linux.h b/sys/amd64/linux/linux.h index cf9f5cccb287..dc4986817d11 100644 --- a/sys/amd64/linux/linux.h +++ b/sys/amd64/linux/linux.h @@ -431,6 +431,7 @@ struct l_pollfd { #define LINUX_ARCH_SET_FS 0x1002 #define LINUX_ARCH_GET_FS 0x1003 #define LINUX_ARCH_GET_GS 0x1004 +#define LINUX_ARCH_CET_STATUS 0x3001 #define linux_copyout_rusage(r, u) copyout(r, u, sizeof(*r)) diff --git a/sys/amd64/linux/linux_machdep.c b/sys/amd64/linux/linux_machdep.c index a82ab411daa1..d2f9d0cacd3c 100644 --- a/sys/amd64/linux/linux_machdep.c +++ b/sys/amd64/linux/linux_machdep.c @@ -242,6 +242,7 @@ linux_sigaltstack(struct thread *td, struct linux_sigaltstack_args *uap) int linux_arch_prctl(struct thread *td, struct linux_arch_prctl_args *args) { + unsigned long long cet[3]; struct pcb *pcb; int error; @@ -275,7 +276,12 @@ linux_arch_prctl(struct thread *td, struct linux_arch_prctl_args *args) error = copyout(&pcb->pcb_gsbase, PTRIN(args->addr), sizeof(args->addr)); break; + case LINUX_ARCH_CET_STATUS: + memset(cet, 0, sizeof(cet)); + error = copyout(&cet, PTRIN(args->addr), sizeof(cet)); + break; default: + linux_msg(td, "unsupported arch_prctl code %#x", args->code); error = EINVAL; } return (error);
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