diff options
Diffstat (limited to 'sys/compat/cloudabi')
| -rw-r--r-- | sys/compat/cloudabi/cloudabi_clock.c | 4 | ||||
| -rw-r--r-- | sys/compat/cloudabi/cloudabi_thread.c | 8 | ||||
| -rw-r--r-- | sys/compat/cloudabi/cloudabi_util.h | 5 | ||||
| -rw-r--r-- | sys/compat/cloudabi/cloudabi_vdso.c | 88 | ||||
| -rw-r--r-- | sys/compat/cloudabi/cloudabi_vdso.lds | 51 |
5 files changed, 146 insertions, 10 deletions
diff --git a/sys/compat/cloudabi/cloudabi_clock.c b/sys/compat/cloudabi/cloudabi_clock.c index b26d98e..ce53a11 100644 --- a/sys/compat/cloudabi/cloudabi_clock.c +++ b/sys/compat/cloudabi/cloudabi_clock.c @@ -117,7 +117,7 @@ cloudabi_sys_clock_res_get(struct thread *td, error = cloudabi_convert_timespec(&ts, &cts); if (error != 0) return (error); - td->td_retval[0] = cts; + memcpy(td->td_retval, &cts, sizeof(cts)); return (0); } @@ -129,6 +129,6 @@ cloudabi_sys_clock_time_get(struct thread *td, int error; error = cloudabi_clock_time_get(td, uap->clock_id, &ts); - td->td_retval[0] = ts; + memcpy(td->td_retval, &ts, sizeof(ts)); return (error); } diff --git a/sys/compat/cloudabi/cloudabi_thread.c b/sys/compat/cloudabi/cloudabi_thread.c index dd54e89..e70549b 100644 --- a/sys/compat/cloudabi/cloudabi_thread.c +++ b/sys/compat/cloudabi/cloudabi_thread.c @@ -60,14 +60,6 @@ cloudabi_sys_thread_exit(struct thread *td, } int -cloudabi_sys_thread_tcb_set(struct thread *td, - struct cloudabi_sys_thread_tcb_set_args *uap) -{ - - return (cpu_set_user_tls(td, uap->tcb)); -} - -int cloudabi_sys_thread_yield(struct thread *td, struct cloudabi_sys_thread_yield_args *uap) { diff --git a/sys/compat/cloudabi/cloudabi_util.h b/sys/compat/cloudabi/cloudabi_util.h index c0a02aa..6eb65aa 100644 --- a/sys/compat/cloudabi/cloudabi_util.h +++ b/sys/compat/cloudabi/cloudabi_util.h @@ -33,6 +33,7 @@ #include <contrib/cloudabi/cloudabi_types_common.h> struct file; +struct sysentvec; struct thread; struct timespec; @@ -76,4 +77,8 @@ int cloudabi_futex_lock_wrlock(struct thread *, cloudabi_lock_t *, cloudabi_scope_t, cloudabi_clockid_t, cloudabi_timestamp_t, cloudabi_timestamp_t); +/* vDSO setup and teardown. */ +void cloudabi_vdso_init(struct sysentvec *, char *, char *); +void cloudabi_vdso_destroy(struct sysentvec *); + #endif diff --git a/sys/compat/cloudabi/cloudabi_vdso.c b/sys/compat/cloudabi/cloudabi_vdso.c new file mode 100644 index 0000000..27c3d36 --- /dev/null +++ b/sys/compat/cloudabi/cloudabi_vdso.c @@ -0,0 +1,88 @@ +/*- + * Copyright (c) 2016 Nuxi, https://nuxi.nl/ + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/types.h> +#include <sys/lock.h> +#include <sys/sysent.h> +#include <sys/rwlock.h> + +#include <vm/vm.h> +#include <vm/pmap.h> +#include <vm/vm_extern.h> +#include <vm/vm_object.h> +#include <vm/vm_page.h> +#include <vm/vm_pager.h> + +#include <compat/cloudabi/cloudabi_util.h> + +void +cloudabi_vdso_init(struct sysentvec *sv, char *begin, char *end) +{ + vm_page_t m; + vm_object_t obj; + vm_offset_t addr; + size_t i, pages, pages_length, vdso_length; + + /* Determine the number of pages needed to store the vDSO. */ + vdso_length = end - begin; + pages = howmany(vdso_length, PAGE_SIZE); + pages_length = pages * PAGE_SIZE; + + /* Allocate a VM object and fill it with the vDSO. */ + obj = vm_pager_allocate(OBJT_PHYS, 0, pages_length, + VM_PROT_DEFAULT, 0, NULL); + addr = kva_alloc(PAGE_SIZE); + for (i = 0; i < pages; ++i) { + VM_OBJECT_WLOCK(obj); + m = vm_page_grab(obj, i, VM_ALLOC_NOBUSY | VM_ALLOC_ZERO); + m->valid = VM_PAGE_BITS_ALL; + VM_OBJECT_WUNLOCK(obj); + + pmap_qenter(addr, &m, 1); + memcpy((void *)addr, begin + i * PAGE_SIZE, + MIN(vdso_length - i * PAGE_SIZE, PAGE_SIZE)); + pmap_qremove(addr, 1); + } + kva_free(addr, PAGE_SIZE); + + /* + * Place the vDSO at the top of the address space. The user + * stack can start right below it. + */ + sv->sv_shared_page_base = sv->sv_maxuser - pages_length; + sv->sv_shared_page_len = pages_length; + sv->sv_shared_page_obj = obj; + sv->sv_usrstack = sv->sv_shared_page_base; +} + +void +cloudabi_vdso_destroy(struct sysentvec *sv) +{ + + vm_object_deallocate(sv->sv_shared_page_obj); +} diff --git a/sys/compat/cloudabi/cloudabi_vdso.lds b/sys/compat/cloudabi/cloudabi_vdso.lds new file mode 100644 index 0000000..807c488 --- /dev/null +++ b/sys/compat/cloudabi/cloudabi_vdso.lds @@ -0,0 +1,51 @@ +/* + * Linker script for the vDSO for CloudABI. + * Based on sys/amd64/linux/linux_vdso.lds.s + * + * $FreeBSD$ + */ + +SECTIONS +{ + . = . + SIZEOF_HEADERS; + + .hash : { *(.hash) } :text + .gnu.hash : { *(.gnu.hash) } + .dynsym : { *(.dynsym) } + .dynstr : { *(.dynstr) } + .gnu.version : { *(.gnu.version) } + .gnu.version_d : { *(.gnu.version_d) } + .gnu.version_r : { *(.gnu.version_r) } + + .note : { *(.note.*) } :text :note + + .eh_frame_hdr : { *(.eh_frame_hdr) } :text :eh_frame_hdr + .eh_frame : { KEEP (*(.eh_frame)) } :text + + .dynamic : { *(.dynamic) } :text :dynamic + + .rodata : { *(.rodata*) } :text + .data : { + *(.data*) + *(.sdata*) + *(.got.plt) *(.got) + *(.gnu.linkonce.d.*) + *(.bss*) + *(.dynbss*) + *(.gnu.linkonce.b.*) + } + + .altinstructions : { *(.altinstructions) } + .altinstr_replacement : { *(.altinstr_replacement) } + + . = ALIGN(0x100); + .text : { *(.test .text*) } :text =0x90909090 +} + +PHDRS +{ + text PT_LOAD FLAGS(5) FILEHDR PHDRS; /* PF_R|PF_X */ + dynamic PT_DYNAMIC FLAGS(4); /* PF_R */ + note PT_NOTE FLAGS(4); /* PF_R */ + eh_frame_hdr PT_GNU_EH_FRAME; +} |
