mirror of
https://git.hardenedbsd.org/hardenedbsd/HardenedBSD.git
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2d19a20d5d
These were missed in r326228. MFC after: 2 weeks
190 lines
5.3 KiB
C
190 lines
5.3 KiB
C
/*-
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* Copyright (c) 2015 Nuxi, https://nuxi.nl/
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/imgact.h>
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#include <sys/kernel.h>
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#include <sys/proc.h>
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#include <sys/sysent.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <machine/frame.h>
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#include <machine/pcb.h>
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#include <machine/vmparam.h>
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#include <compat/cloudabi/cloudabi_util.h>
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#include <compat/cloudabi64/cloudabi64_syscall.h>
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#include <compat/cloudabi64/cloudabi64_util.h>
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extern const char *cloudabi64_syscallnames[];
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extern struct sysent cloudabi64_sysent[];
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static void
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cloudabi64_proc_setregs(struct thread *td, struct image_params *imgp,
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unsigned long stack)
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{
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struct trapframe *regs;
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exec_setregs(td, imgp, stack);
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/*
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* The stack now contains a pointer to the TCB and the auxiliary
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* vector. Let x0 point to the auxiliary vector, and set
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* tpidr_el0 to the TCB.
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*/
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regs = td->td_frame;
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regs->tf_x[0] =
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stack + roundup(sizeof(cloudabi64_tcb_t), sizeof(register_t));
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(void)cpu_set_user_tls(td, TO_PTR(stack));
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}
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static int
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cloudabi64_fetch_syscall_args(struct thread *td)
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{
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struct trapframe *frame;
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struct syscall_args *sa;
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int i;
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frame = td->td_frame;
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sa = &td->td_sa;
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/* Obtain system call number. */
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sa->code = frame->tf_x[8];
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if (sa->code >= CLOUDABI64_SYS_MAXSYSCALL)
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return (ENOSYS);
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sa->callp = &cloudabi64_sysent[sa->code];
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sa->narg = sa->callp->sy_narg;
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/* Fetch system call arguments. */
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for (i = 0; i < MAXARGS; i++)
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sa->args[i] = frame->tf_x[i];
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/* Default system call return values. */
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td->td_retval[0] = 0;
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td->td_retval[1] = frame->tf_x[1];
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return (0);
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}
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static void
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cloudabi64_set_syscall_retval(struct thread *td, int error)
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{
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struct trapframe *frame = td->td_frame;
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switch (error) {
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case 0:
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/* System call succeeded. */
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frame->tf_x[0] = td->td_retval[0];
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frame->tf_x[1] = td->td_retval[1];
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frame->tf_spsr &= ~PSR_C;
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break;
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case ERESTART:
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/* Restart system call. */
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frame->tf_elr -= 4;
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break;
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case EJUSTRETURN:
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break;
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default:
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/* System call returned an error. */
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frame->tf_x[0] = cloudabi_convert_errno(error);
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frame->tf_spsr |= PSR_C;
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break;
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}
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}
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static void
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cloudabi64_schedtail(struct thread *td)
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{
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struct trapframe *frame = td->td_frame;
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/*
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* Initial register values for processes returning from fork.
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* Make sure that we only set these values when forking, not
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* when creating a new thread.
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*/
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if ((td->td_pflags & TDP_FORKING) != 0) {
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frame->tf_x[0] = CLOUDABI_PROCESS_CHILD;
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frame->tf_x[1] = td->td_tid;
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}
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}
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int
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cloudabi64_thread_setregs(struct thread *td,
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const cloudabi64_threadattr_t *attr, uint64_t tcb)
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{
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struct trapframe *frame;
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stack_t stack;
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/* Perform standard register initialization. */
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stack.ss_sp = TO_PTR(attr->stack);
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stack.ss_size = attr->stack_len;
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cpu_set_upcall(td, TO_PTR(attr->entry_point), NULL, &stack);
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/*
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* Pass in the thread ID of the new thread and the argument
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* pointer provided by the parent thread in as arguments to the
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* entry point.
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*/
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frame = td->td_frame;
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frame->tf_x[0] = td->td_tid;
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frame->tf_x[1] = attr->argument;
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/* Set up TLS. */
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return (cpu_set_user_tls(td, TO_PTR(tcb)));
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}
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static struct sysentvec cloudabi64_elf_sysvec = {
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.sv_size = CLOUDABI64_SYS_MAXSYSCALL,
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.sv_table = cloudabi64_sysent,
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.sv_fixup = cloudabi64_fixup,
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.sv_name = "CloudABI ELF64",
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.sv_coredump = elf64_coredump,
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.sv_pagesize = PAGE_SIZE,
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.sv_minuser = VM_MIN_ADDRESS,
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.sv_maxuser = VM_MAXUSER_ADDRESS,
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.sv_stackprot = VM_PROT_READ | VM_PROT_WRITE,
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.sv_copyout_strings = cloudabi64_copyout_strings,
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.sv_setregs = cloudabi64_proc_setregs,
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.sv_flags = SV_ABI_CLOUDABI | SV_CAPSICUM | SV_LP64,
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.sv_set_syscall_retval = cloudabi64_set_syscall_retval,
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.sv_fetch_syscall_args = cloudabi64_fetch_syscall_args,
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.sv_syscallnames = cloudabi64_syscallnames,
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.sv_schedtail = cloudabi64_schedtail,
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};
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INIT_SYSENTVEC(elf_sysvec, &cloudabi64_elf_sysvec);
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Elf64_Brandinfo cloudabi64_brand = {
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.brand = ELFOSABI_CLOUDABI,
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.machine = EM_AARCH64,
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.sysvec = &cloudabi64_elf_sysvec,
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.flags = BI_CAN_EXEC_DYN | BI_BRAND_ONLY_STATIC,
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};
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