Page MenuHomeFreeBSD
Differential D3974 Diff 9602 sys/compat/cloudabi64/cloudabi64_module.c

Changeset View

Standalone View

View Options

sys/compat/cloudabi64/cloudabi64_module.c

  • This file was copied from sys/amd64/cloudabi64/cloudabi64_sysvec.c.
Show All 21 Lines
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE. * SUCH DAMAGE.
*/ */
#include <sys/cdefs.h> #include <sys/cdefs.h>
__FBSDID("$FreeBSD: head/sys/amd64/cloudabi64/cloudabi64_sysvec.c 286924 2015-08-19 15:18:32Z bapt $"); __FBSDID("$FreeBSD: head/sys/amd64/cloudabi64/cloudabi64_sysvec.c 286924 2015-08-19 15:18:32Z bapt $");
#include <sys/param.h> #include <sys/param.h>
#include <sys/exec.h>
#include <sys/imgact.h> #include <sys/imgact.h>
#include <sys/imgact_elf.h>
#include <sys/kernel.h> #include <sys/kernel.h>
#include <sys/module.h> #include <sys/module.h>
#include <sys/proc.h> #include <sys/proc.h>
#include <sys/smp.h> #include <sys/smp.h>
#include <sys/sysctl.h> #include <sys/sysctl.h>
#include <sys/sysent.h> #include <sys/sysent.h>
#include <sys/systm.h> #include <sys/systm.h>
#include <vm/pmap.h>
#include <vm/vm.h>
#include <machine/frame.h>
#include <machine/pcb.h>
#include <machine/pmap.h>
#include <machine/psl.h>
#include <machine/vmparam.h>
#include <compat/cloudabi/cloudabi_util.h>
#include <compat/cloudabi64/cloudabi64_syscall.h>
#include <compat/cloudabi64/cloudabi64_syscalldefs.h> #include <compat/cloudabi64/cloudabi64_syscalldefs.h>
#include <compat/cloudabi64/cloudabi64_util.h> #include <compat/cloudabi64/cloudabi64_util.h>
extern const char *cloudabi64_syscallnames[]; register_t *
extern struct sysent cloudabi64_sysent[];
static register_t *
cloudabi64_copyout_strings(struct image_params *imgp) cloudabi64_copyout_strings(struct image_params *imgp)
{ {
struct image_args *args;
uintptr_t begin; uintptr_t begin;
size_t len; size_t len;
/* Copy out program arguments. */ /* Copy out program arguments. */
len = imgp->args->begin_envv - imgp->args->begin_argv; args = imgp->args;
begin = rounddown2(USRSTACK - len, sizeof(register_t)); len = args->begin_envv - args->begin_argv;
copyout(imgp->args->begin_argv, (void *)begin, len); begin = rounddown2(imgp->sysent->sv_usrstack - len, sizeof(register_t));
copyout(args->begin_argv, (void *)begin, len);
return ((register_t *)begin); return ((register_t *)begin);
} }
static int int
cloudabi64_fixup(register_t **stack_base, struct image_params *imgp) cloudabi64_fixup(register_t **stack_base, struct image_params *imgp)
{ {
char canarybuf[64]; char canarybuf[64];
Elf64_Auxargs *args; Elf64_Auxargs *args;
struct thread *td; struct thread *td;
void *argdata, *canary; void *argdata, *canary;
size_t argdatalen; size_t argdatalen;
int error; int error;
▲ Show 20 Lines • Show All 41 Lines • ▼ Show 20 Lines#define PTR(type, ptr) { .a_type = (type), .a_ptr = (uintptr_t)(ptr) }
VAL(CLOUDABI_AT_TID, td->td_tid), VAL(CLOUDABI_AT_TID, td->td_tid),
#undef VAL #undef VAL
#undef PTR #undef PTR
{ .a_type = CLOUDABI_AT_NULL }, { .a_type = CLOUDABI_AT_NULL },
}; };
*stack_base -= howmany(sizeof(auxv), sizeof(register_t)); *stack_base -= howmany(sizeof(auxv), sizeof(register_t));
return (copyout(auxv, *stack_base, sizeof(auxv))); return (copyout(auxv, *stack_base, sizeof(auxv)));
} }
static int
cloudabi64_fetch_syscall_args(struct thread *td, struct syscall_args *sa)
{
struct trapframe *frame = td->td_frame;
/* Obtain system call number. */
sa->code = frame->tf_rax;
if (sa->code >= CLOUDABI64_SYS_MAXSYSCALL)
return (ENOSYS);
sa->callp = &cloudabi64_sysent[sa->code];
/* Fetch system call arguments. */
sa->args[0] = frame->tf_rdi;
sa->args[1] = frame->tf_rsi;
sa->args[2] = frame->tf_rdx;
sa->args[3] = frame->tf_rcx; /* Actually %r10. */
sa->args[4] = frame->tf_r8;
sa->args[5] = frame->tf_r9;
/* Default system call return values. */
td->td_retval[0] = 0;
td->td_retval[1] = frame->tf_rdx;
return (0);
}
static void
cloudabi64_set_syscall_retval(struct thread *td, int error)
{
struct trapframe *frame = td->td_frame;
switch (error) {
case 0:
/* System call succeeded. */
frame->tf_rax = td->td_retval[0];
frame->tf_rdx = td->td_retval[1];
frame->tf_rflags &= ~PSL_C;
break;
case ERESTART:
/* Restart system call. */
frame->tf_rip -= frame->tf_err;
frame->tf_r10 = frame->tf_rcx;
set_pcb_flags(td->td_pcb, PCB_FULL_IRET);
break;
case EJUSTRETURN:
break;
default:
/* System call returned an error. */
frame->tf_rax = cloudabi_convert_errno(error);
frame->tf_rflags |= PSL_C;
break;
}
}
static void
cloudabi64_schedtail(struct thread *td)
{
struct trapframe *frame = td->td_frame;
/* Initial register values for processes returning from fork. */
frame->tf_rax = CLOUDABI_PROCESS_CHILD;
frame->tf_rdx = td->td_tid;
}
void
cloudabi64_thread_setregs(struct thread *td,
const cloudabi64_threadattr_t *attr)
{
struct trapframe *frame;
stack_t stack;
/* Perform standard register initialization. */
stack.ss_sp = (void *)attr->stack;
stack.ss_size = attr->stack_size;
cpu_set_upcall_kse(td, (void *)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_rdi = td->td_tid;
frame->tf_rsi = attr->argument;
}
static struct sysentvec cloudabi64_elf_sysvec = {
.sv_size = CLOUDABI64_SYS_MAXSYSCALL,
.sv_table = cloudabi64_sysent,
.sv_fixup = cloudabi64_fixup,
.sv_name = "CloudABI ELF64",
.sv_coredump = elf64_coredump,
.sv_pagesize = PAGE_SIZE,
.sv_minuser = VM_MIN_ADDRESS,
.sv_maxuser = VM_MAXUSER_ADDRESS,
.sv_usrstack = USRSTACK,
.sv_stackprot = VM_PROT_READ | VM_PROT_WRITE,
.sv_copyout_strings = cloudabi64_copyout_strings,
.sv_flags = SV_ABI_CLOUDABI | SV_CAPSICUM,
.sv_set_syscall_retval = cloudabi64_set_syscall_retval,
.sv_fetch_syscall_args = cloudabi64_fetch_syscall_args,
.sv_syscallnames = cloudabi64_syscallnames,
.sv_schedtail = cloudabi64_schedtail,
};
INIT_SYSENTVEC(elf_sysvec, &cloudabi64_elf_sysvec);
static Elf64_Brandinfo cloudabi64_brand = {
.brand = ELFOSABI_CLOUDABI,
.machine = EM_X86_64,
.sysvec = &cloudabi64_elf_sysvec,
.compat_3_brand = "CloudABI",
};
static int static int
cloudabi64_modevent(module_t mod, int type, void *data) cloudabi64_modevent(module_t mod, int type, void *data)
{ {
switch (type) { switch (type) {
case MOD_LOAD: case MOD_LOAD:
if (elf64_insert_brand_entry(&cloudabi64_brand) < 0) { if (elf64_insert_brand_entry(&cloudabi64_brand) < 0) {
Show All 26 Lines