2d19a20d5d
These were missed in r326228. MFC after: 2 weeks
198 lines
5.5 KiB
C
198 lines
5.5 KiB
C
/*-
|
|
* Copyright (c) 2015-2016 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/param.h>
|
|
#include <sys/imgact.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/sysent.h>
|
|
|
|
#include <vm/vm.h>
|
|
#include <vm/pmap.h>
|
|
|
|
#include <machine/frame.h>
|
|
#include <machine/pcb.h>
|
|
#include <machine/vmparam.h>
|
|
|
|
#include <compat/cloudabi/cloudabi_util.h>
|
|
|
|
#include <compat/cloudabi32/cloudabi32_syscall.h>
|
|
#include <compat/cloudabi32/cloudabi32_util.h>
|
|
|
|
extern const char *cloudabi32_syscallnames[];
|
|
extern struct sysent cloudabi32_sysent[];
|
|
|
|
static void
|
|
cloudabi32_proc_setregs(struct thread *td, struct image_params *imgp,
|
|
unsigned long stack)
|
|
{
|
|
struct trapframe *regs;
|
|
|
|
exec_setregs(td, imgp, stack);
|
|
|
|
/*
|
|
* The stack now contains a pointer to the TCB and the auxiliary
|
|
* vector. Let r0 point to the auxiliary vector, and set
|
|
* tpidrurw to the TCB.
|
|
*/
|
|
regs = td->td_frame;
|
|
regs->tf_r0 =
|
|
stack + roundup(sizeof(cloudabi32_tcb_t), sizeof(register_t));
|
|
(void)cpu_set_user_tls(td, TO_PTR(stack));
|
|
}
|
|
|
|
static int
|
|
cloudabi32_fetch_syscall_args(struct thread *td)
|
|
{
|
|
struct trapframe *frame;
|
|
struct syscall_args *sa;
|
|
int error;
|
|
|
|
frame = td->td_frame;
|
|
sa = &td->td_sa;
|
|
|
|
/* Obtain system call number. */
|
|
sa->code = frame->tf_r12;
|
|
if (sa->code >= CLOUDABI32_SYS_MAXSYSCALL)
|
|
return (ENOSYS);
|
|
sa->callp = &cloudabi32_sysent[sa->code];
|
|
sa->narg = sa->callp->sy_narg;
|
|
|
|
/* Fetch system call arguments from registers and the stack. */
|
|
sa->args[0] = frame->tf_r0;
|
|
sa->args[1] = frame->tf_r1;
|
|
sa->args[2] = frame->tf_r2;
|
|
sa->args[3] = frame->tf_r3;
|
|
if (sa->narg > 4) {
|
|
error = copyin((void *)td->td_frame->tf_usr_sp, &sa->args[4],
|
|
(sa->narg - 4) * sizeof(register_t));
|
|
if (error != 0)
|
|
return (error);
|
|
}
|
|
|
|
/* Default system call return values. */
|
|
td->td_retval[0] = 0;
|
|
td->td_retval[1] = frame->tf_r1;
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
cloudabi32_set_syscall_retval(struct thread *td, int error)
|
|
{
|
|
struct trapframe *frame = td->td_frame;
|
|
|
|
switch (error) {
|
|
case 0:
|
|
/* System call succeeded. */
|
|
frame->tf_r0 = td->td_retval[0];
|
|
frame->tf_r1 = td->td_retval[1];
|
|
frame->tf_spsr &= ~PSR_C;
|
|
break;
|
|
case ERESTART:
|
|
/* Restart system call. */
|
|
frame->tf_pc -= 4;
|
|
break;
|
|
case EJUSTRETURN:
|
|
break;
|
|
default:
|
|
/* System call returned an error. */
|
|
frame->tf_r0 = cloudabi_convert_errno(error);
|
|
frame->tf_spsr |= PSR_C;
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
cloudabi32_schedtail(struct thread *td)
|
|
{
|
|
struct trapframe *frame = td->td_frame;
|
|
|
|
/*
|
|
* Initial register values for processes returning from fork.
|
|
* Make sure that we only set these values when forking, not
|
|
* when creating a new thread.
|
|
*/
|
|
if ((td->td_pflags & TDP_FORKING) != 0) {
|
|
frame->tf_r0 = CLOUDABI_PROCESS_CHILD;
|
|
frame->tf_r1 = td->td_tid;
|
|
}
|
|
}
|
|
|
|
int
|
|
cloudabi32_thread_setregs(struct thread *td,
|
|
const cloudabi32_threadattr_t *attr, uint32_t tcb)
|
|
{
|
|
struct trapframe *frame;
|
|
stack_t stack;
|
|
|
|
/* Perform standard register initialization. */
|
|
stack.ss_sp = TO_PTR(attr->stack);
|
|
stack.ss_size = attr->stack_len;
|
|
cpu_set_upcall(td, TO_PTR(attr->entry_point), NULL, &stack);
|
|
|
|
/*
|
|
* Pass in the thread ID of the new thread and the argument
|
|
* pointer provided by the parent thread in as arguments to the
|
|
* entry point.
|
|
*/
|
|
frame = td->td_frame;
|
|
frame->tf_r0 = td->td_tid;
|
|
frame->tf_r1 = attr->argument;
|
|
|
|
/* Set up TLS. */
|
|
return (cpu_set_user_tls(td, TO_PTR(tcb)));
|
|
}
|
|
|
|
static struct sysentvec cloudabi32_elf_sysvec = {
|
|
.sv_size = CLOUDABI32_SYS_MAXSYSCALL,
|
|
.sv_table = cloudabi32_sysent,
|
|
.sv_fixup = cloudabi32_fixup,
|
|
.sv_name = "CloudABI ELF32",
|
|
.sv_coredump = elf32_coredump,
|
|
.sv_pagesize = PAGE_SIZE,
|
|
.sv_minuser = VM_MIN_ADDRESS,
|
|
.sv_maxuser = VM_MAXUSER_ADDRESS,
|
|
.sv_stackprot = VM_PROT_READ | VM_PROT_WRITE,
|
|
.sv_copyout_strings = cloudabi32_copyout_strings,
|
|
.sv_setregs = cloudabi32_proc_setregs,
|
|
.sv_flags = SV_ABI_CLOUDABI | SV_CAPSICUM | SV_ILP32,
|
|
.sv_set_syscall_retval = cloudabi32_set_syscall_retval,
|
|
.sv_fetch_syscall_args = cloudabi32_fetch_syscall_args,
|
|
.sv_syscallnames = cloudabi32_syscallnames,
|
|
.sv_schedtail = cloudabi32_schedtail,
|
|
};
|
|
|
|
INIT_SYSENTVEC(elf_sysvec, &cloudabi32_elf_sysvec);
|
|
|
|
Elf32_Brandinfo cloudabi32_brand = {
|
|
.brand = ELFOSABI_CLOUDABI,
|
|
.machine = EM_ARM,
|
|
.sysvec = &cloudabi32_elf_sysvec,
|
|
.flags = BI_BRAND_ONLY_STATIC,
|
|
};
|