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- /* -*- mode:c; c-file-style:"k&r"; c-basic-offset: 4; tab-width:4; indent-tabs-mode:nil; mode:auto-fill; fill-column:78; -*- */
- /* vim: set ts=4 sw=4 et tw=78 fo=cqt wm=0: */
- /* Copyright (C) 2014 Stony Brook University
- This file is part of Graphene Library OS.
- Graphene Library OS is free software: you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public License
- as published by the Free Software Foundation, either version 3 of the
- License, or (at your option) any later version.
- Graphene Library OS is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU Lesser General Public License for more details.
- You should have received a copy of the GNU Lesser General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>. */
- /*
- * pal_host.h
- *
- * This file contains definition of PAL host ABI.
- */
- #ifndef PAL_HOST_H
- #define PAL_HOST_H
- #ifndef IN_PAL
- # error "cannot be included outside PAL"
- #endif
- #include <atomic.h>
- /* Spinlocking */
- typedef struct spinlock {
- struct atomic_int value;
- } PAL_LOCK;
- int _DkSpinLock (struct spinlock * lock);
- int _DkSpinUnlock (struct spinlock * lock);
- #define LOCK_INIT { .value = { 0 } }
- #define _DkInternalLock _DkSpinLock
- #define _DkInternalUnlock _DkSpinUnlock
- void * malloc_untrusted (int size);
- void free_untrusted (void * mem);
- #include <list.h>
- /* Simpler mutex design: a single variable that tracks whether the mutex
- * is locked (just waste a 64 bit word for now). State is 1 (locked) or
- * 0 (unlocked).
- *
- * Keep a count of how many threads are waiting on the mutex.
- *
- * If DEBUG_MUTEX is defined, mutex_handle will record the owner of
- * mutex locking. */
- struct mutex_handle {
- volatile int64_t * locked;
- struct atomic_int nwaiters;
- #ifdef DEBUG_MUTEX
- int owner;
- #endif
- };
- /* Initializer of Mutexes */
- #define MUTEX_HANDLE_INIT { .u = 0 }
- #define INIT_MUTEX_HANDLE(m) do { (m)->u = 0; } while (0)
- DEFINE_LIST(pal_handle_thread);
- struct pal_handle_thread {
- PAL_HDR reserved;
- PAL_IDX tid;
- PAL_PTR tcs;
- LIST_TYPE(pal_handle_thread) list;
- void * param;
- };
- typedef struct pal_handle
- {
- /*
- * Here we define the internal structure of PAL_HANDLE.
- * user has no access to the content inside these handles.
- */
- PAL_HDR hdr;
- union {
- struct {
- PAL_IDX fds[2];
- } generic;
- struct {
- PAL_IDX fd;
- PAL_BOL append;
- PAL_BOL pass;
- PAL_STR realpath;
- PAL_NUM total;
- PAL_PTR stubs;
- } file;
- struct {
- PAL_IDX fd;
- PAL_NUM pipeid;
- PAL_BOL nonblocking;
- } pipe;
- struct {
- PAL_IDX fds[2];
- PAL_BOL nonblocking;
- } pipeprv;
- struct {
- PAL_IDX fd_in, fd_out;
- PAL_IDX dev_type;
- PAL_BOL destroy;
- PAL_STR realpath;
- } dev;
- struct {
- PAL_IDX fd;
- PAL_STR realpath;
- PAL_PTR buf;
- PAL_PTR ptr;
- PAL_PTR end;
- PAL_BOL endofstream;
- } dir;
- struct {
- PAL_IDX fd;
- } gipc;
- struct {
- PAL_IDX fd;
- PAL_PTR bind;
- PAL_PTR conn;
- PAL_BOL nonblocking;
- PAL_NUM linger;
- PAL_NUM receivebuf;
- PAL_NUM sendbuf;
- PAL_NUM receivetimeout;
- PAL_NUM sendtimeout;
- PAL_BOL tcp_cork;
- PAL_BOL tcp_keepalive;
- PAL_BOL tcp_nodelay;
- } sock;
- struct {
- PAL_IDX stream_in, stream_out;
- PAL_IDX cargo;
- PAL_IDX pid;
- PAL_BOL nonblocking;
- } process;
- struct {
- PAL_IDX cli;
- PAL_IDX srv;
- PAL_IDX port;
- PAL_BOL nonblocking;
- } mcast;
- struct pal_handle_thread thread;
- struct {
- struct atomic_int nwaiters;
- PAL_NUM max_value;
- union {
- struct mutex_handle mut;
- } mutex;
- struct {
- struct atomic_int * signaled;
- struct atomic_int nwaiters;
- PAL_BOL isnotification;
- } event;
- };
- };
- } * PAL_HANDLE;
- #define RFD(n) (00001 << (n))
- #define WFD(n) (00010 << (n))
- #define WRITEABLE(n) (00100 << (n))
- #define ERROR(n) (01000 << (n))
- #define MAX_FDS (3)
- #define HAS_FDS (00077)
- #define HANDLE_TYPE(handle) ((handle)->hdr.type)
- struct arch_frame {
- #ifdef __x86_64__
- unsigned long rsp, rbp, rbx, rsi, rdi, r12, r13, r14, r15;
- #else
- # error "unsupported architecture"
- #endif
- };
- #ifdef __x86_64__
- # define store_register(reg, var) \
- asm volatile ("movq %%" #reg ", %0" : "=g" (var) :: "memory");
- # define store_register_in_frame(reg, f) store_register(reg, (f)->reg)
- # define arch_store_frame(f) \
- store_register_in_frame(rsp, f) \
- store_register_in_frame(rbp, f) \
- store_register_in_frame(rbx, f) \
- store_register_in_frame(rsi, f) \
- store_register_in_frame(rdi, f) \
- store_register_in_frame(r12, f) \
- store_register_in_frame(r13, f) \
- store_register_in_frame(r14, f) \
- store_register_in_frame(r15, f)
- # define restore_register(reg, var, clobber...) \
- asm volatile ("movq %0, %%" #reg :: "g" (var) : "memory", ##clobber);
- # define restore_register_in_frame(reg, f) \
- restore_register(reg, (f)->reg, \
- "r15", "r14", "r13", "r12", "rdi", "rsi", "rbx")
- # define arch_restore_frame(f) \
- restore_register_in_frame(r15, f) \
- restore_register_in_frame(r14, f) \
- restore_register_in_frame(r13, f) \
- restore_register_in_frame(r12, f) \
- restore_register_in_frame(rdi, f) \
- restore_register_in_frame(rsi, f) \
- restore_register_in_frame(rbx, f) \
- restore_register_in_frame(rbp, f) \
- restore_register_in_frame(rsp, f)
- #else /* __x86_64__ */
- # error "unsupported architecture"
- #endif
- #define PAL_FRAME_IDENTIFIER (0xdeaddeadbeefbeef)
- struct pal_frame {
- volatile uint64_t identifier;
- void * func;
- const char * funcname;
- struct arch_frame arch;
- };
- /* DEP 12/25/17: This frame storage thing is important to mark volatile.
- * The compiler should not optimize out any of these changes, and
- * because some accesses can happen during an exception, these are not
- * visible to the compiler in an otherwise stack-local variable (so the
- * compiler will try to optimize out these assignments.
- */
- static inline
- void __store_frame (volatile struct pal_frame * frame,
- void * func, const char * funcname)
- {
- arch_store_frame(&frame->arch)
- frame->func = func;
- frame->funcname = funcname;
- asm volatile ("nop" ::: "memory");
- frame->identifier = PAL_FRAME_IDENTIFIER;
- }
- #define ENTER_PAL_CALL(name) \
- struct pal_frame frame; \
- __store_frame(&frame, &(name), #name)
- static inline
- void __clear_frame (volatile struct pal_frame * frame)
- {
- if (frame->identifier == PAL_FRAME_IDENTIFIER) {
- asm volatile ("nop" ::: "memory");
- frame->identifier = 0;
- }
- }
- #define LEAVE_PAL_CALL() \
- do { \
- __clear_frame(&frame); \
- } while (0)
- #define LEAVE_PAL_CALL_RETURN(retval) \
- do { \
- __clear_frame(&frame); \
- return (retval); \
- } while (0)
- #endif /* PAL_HOST_H */
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