Author: trasz Date: Mon Feb 20 16:13:40 2017 New Revision: 313993 URL: https://svnweb.freebsd.org/changeset/base/313993
Log: Reimplement linux_arch_prctl() as a wrapper around sysarch(2). This also adds support for LINUX_ARCH_SET_GS. Reviewed by: dchagin MFC after: 2 weeks Sponsored by: DARPA, AFRL Differential Revision: https://reviews.freebsd.org/D9372 Modified: head/sys/amd64/linux/linux_machdep.c Modified: head/sys/amd64/linux/linux_machdep.c ============================================================================== --- head/sys/amd64/linux/linux_machdep.c Mon Feb 20 15:53:16 2017 (r313992) +++ head/sys/amd64/linux/linux_machdep.c Mon Feb 20 16:13:40 2017 (r313993) @@ -88,6 +88,7 @@ __FBSDID("$FreeBSD$"); #include <compat/linux/linux_util.h> #include <compat/linux/linux_emul.h> +#include <x86/include/sysarch.h> int linux_execve(struct thread *td, struct linux_execve_args *args) @@ -226,28 +227,34 @@ int linux_arch_prctl(struct thread *td, struct linux_arch_prctl_args *args) { int error; - struct pcb *pcb; + struct sysarch_args bsd_args; LINUX_CTR2(arch_prctl, "0x%x, %p", args->code, args->addr); - error = ENOTSUP; - pcb = td->td_pcb; - switch (args->code) { - case LINUX_ARCH_GET_GS: - error = copyout(&pcb->pcb_gsbase, (unsigned long *)args->addr, - sizeof(args->addr)); - break; case LINUX_ARCH_SET_GS: - if (args->addr >= VM_MAXUSER_ADDRESS) - return(EPERM); + bsd_args.op = AMD64_SET_GSBASE; + bsd_args.parms = (void *)args->addr; + error = sysarch(td, &bsd_args); + if (error == EINVAL) + error = EPERM; + break; + case LINUX_ARCH_SET_FS: + bsd_args.op = AMD64_SET_FSBASE; + bsd_args.parms = (void *)args->addr; + error = sysarch(td, &bsd_args); + if (error == EINVAL) + error = EPERM; break; case LINUX_ARCH_GET_FS: - error = copyout(&pcb->pcb_fsbase, (unsigned long *)args->addr, - sizeof(args->addr)); + bsd_args.op = AMD64_GET_FSBASE; + bsd_args.parms = (void *)args->addr; + error = sysarch(td, &bsd_args); break; - case LINUX_ARCH_SET_FS: - error = linux_set_cloned_tls(td, (void *)args->addr); + case LINUX_ARCH_GET_GS: + bsd_args.op = AMD64_GET_GSBASE; + bsd_args.parms = (void *)args->addr; + error = sysarch(td, &bsd_args); break; default: error = EINVAL; _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
