+++ /dev/null
- /*
- * Commpage syscalls
- *
- * Copyright (c) 2006 Pierre d'Herbemont
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, see <http://www.gnu.org/licenses/>.
- */
-#include <fcntl.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <errno.h>
-
-#include <mach/message.h>
-#include <mach/mach.h>
-#include <mach/mach_time.h>
-#include <sys/time.h>
-#include <sys/mman.h>
-#include <libkern/OSAtomic.h>
-
-#include "qemu.h"
-
-//#define DEBUG_COMMPAGE
-
-#ifdef DEBUG_COMMPAGE
-# define DPRINTF(...) do { qemu_log(__VA_ARGS__); printf(__VA_ARGS__); } while(0)
-#else
-# define DPRINTF(...) do { qemu_log(__VA_ARGS__); } while(0)
-#endif
-
-/********************************************************************
- * Commpage definitions
- */
-#ifdef TARGET_I386
-/* Reserve space for the commpage see xnu/osfmk/i386/cpu_capabilities.h */
-# define COMMPAGE_START (-16 * 4096) /* base address is -20 * 4096 */
-# define COMMPAGE_SIZE (0x1240) /* _COMM_PAGE_AREA_LENGTH is 19 * 4096 */
-#elif defined(TARGET_PPC)
-/* Reserve space for the commpage see xnu/osfmk/ppc/cpu_capabilities.h */
-# define COMMPAGE_START (-8*4096)
-# define COMMPAGE_SIZE (2*4096) /* its _COMM_PAGE_AREA_USED but _COMM_PAGE_AREA_LENGTH is 7*4096 */
-#endif
-
-void do_compare_and_swap32(void *cpu_env, int num);
-void do_compare_and_swap64(void *cpu_env, int num);
-void do_add_atomic_word32(void *cpu_env, int num);
-void do_cgettimeofday(void *cpu_env, int num, uint32_t arg1);
-void do_nanotime(void *cpu_env, int num);
-
-void unimpl_commpage(void *cpu_env, int num);
-
-typedef void (*commpage_8args_function_t)(uint32_t arg1, uint32_t arg2, uint32_t arg3,
- uint32_t arg4, uint32_t arg5, uint32_t arg6, uint32_t arg7,
- uint32_t arg8);
-typedef void (*commpage_indirect_function_t)(void *cpu_env, int num, uint32_t arg1,
- uint32_t arg2, uint32_t arg3, uint32_t arg4, uint32_t arg5,
- uint32_t arg6, uint32_t arg7, uint32_t arg8);
-
-#define HAS_PTR 0x10
-#define NO_PTR 0x20
-#define CALL_DIRECT 0x1
-#define CALL_INDIRECT 0x2
-
-#define COMMPAGE_ENTRY(name, nargs, offset, func, options) \
- { #name, offset, nargs, options, (commpage_8args_function_t)func }
-
-struct commpage_entry {
- char * name;
- int offset;
- int nargs;
- char options;
- commpage_8args_function_t function;
-};
-
-static inline int commpage_code_num(struct commpage_entry *entry)
-{
- if((entry->options & HAS_PTR))
- return entry->offset + 4;
- else
- return entry->offset;
-}
-
-static inline int commpage_is_indirect(struct commpage_entry *entry)
-{
- return !(entry->options & CALL_DIRECT);
-}
-
-/********************************************************************
- * Commpage entry
- */
-static struct commpage_entry commpage_entries[] =
-{
- COMMPAGE_ENTRY(compare_and_swap32, 0, 0x080, do_compare_and_swap32, CALL_INDIRECT | HAS_PTR),
- COMMPAGE_ENTRY(compare_and_swap64, 0, 0x0c0, do_compare_and_swap64, CALL_INDIRECT | HAS_PTR),
- COMMPAGE_ENTRY(enqueue, 0, 0x100, unimpl_commpage, CALL_INDIRECT),
- COMMPAGE_ENTRY(dequeue, 0, 0x140, unimpl_commpage, CALL_INDIRECT),
- COMMPAGE_ENTRY(memory_barrier, 0, 0x180, unimpl_commpage, CALL_INDIRECT),
- COMMPAGE_ENTRY(add_atomic_word32, 0, 0x1a0, do_add_atomic_word32, CALL_INDIRECT | HAS_PTR),
- COMMPAGE_ENTRY(add_atomic_word64, 0, 0x1c0, unimpl_commpage, CALL_INDIRECT | HAS_PTR),
-
- COMMPAGE_ENTRY(mach_absolute_time, 0, 0x200, unimpl_commpage, CALL_INDIRECT),
- COMMPAGE_ENTRY(spinlock_try, 1, 0x220, unimpl_commpage, CALL_INDIRECT),
- COMMPAGE_ENTRY(spinlock_lock, 1, 0x260, OSSpinLockLock, CALL_DIRECT),
- COMMPAGE_ENTRY(spinlock_unlock, 1, 0x2a0, OSSpinLockUnlock, CALL_DIRECT),
- COMMPAGE_ENTRY(pthread_getspecific, 0, 0x2c0, unimpl_commpage, CALL_INDIRECT),
- COMMPAGE_ENTRY(gettimeofday, 1, 0x2e0, do_cgettimeofday, CALL_INDIRECT),
- COMMPAGE_ENTRY(sys_dcache_flush, 0, 0x4e0, unimpl_commpage, CALL_INDIRECT),
- COMMPAGE_ENTRY(sys_icache_invalidate, 0, 0x520, unimpl_commpage, CALL_INDIRECT),
- COMMPAGE_ENTRY(pthread_self, 0, 0x580, unimpl_commpage, CALL_INDIRECT),
-
- COMMPAGE_ENTRY(relinquish, 0, 0x5c0, unimpl_commpage, CALL_INDIRECT),
-
-#ifdef TARGET_I386
- COMMPAGE_ENTRY(bts, 0, 0x5e0, unimpl_commpage, CALL_INDIRECT),
- COMMPAGE_ENTRY(btc, 0, 0x5f0, unimpl_commpage, CALL_INDIRECT),
-#endif
-
- COMMPAGE_ENTRY(bzero, 2, 0x600, bzero, CALL_DIRECT),
- COMMPAGE_ENTRY(bcopy, 3, 0x780, bcopy, CALL_DIRECT),
- COMMPAGE_ENTRY(memcpy, 3, 0x7a0, memcpy, CALL_DIRECT),
-
-#ifdef TARGET_I386
- COMMPAGE_ENTRY(old_nanotime, 0, 0xf80, do_nanotime, CALL_INDIRECT),
- COMMPAGE_ENTRY(memset_pattern, 0, 0xf80, unimpl_commpage, CALL_INDIRECT),
- COMMPAGE_ENTRY(long_copy, 0, 0x1200, unimpl_commpage, CALL_INDIRECT),
-
- COMMPAGE_ENTRY(sysintegrity, 0, 0x1600, unimpl_commpage, CALL_INDIRECT),
-
- COMMPAGE_ENTRY(nanotime, 0, 0x1700, do_nanotime, CALL_INDIRECT),
-#elif TARGET_PPC
- COMMPAGE_ENTRY(compare_and_swap32b, 0, 0xf80, unimpl_commpage, CALL_INDIRECT),
- COMMPAGE_ENTRY(compare_and_swap64b, 0, 0xfc0, unimpl_commpage, CALL_INDIRECT),
- COMMPAGE_ENTRY(memset_pattern, 0, 0x1000, unimpl_commpage, CALL_INDIRECT),
- COMMPAGE_ENTRY(bigcopy, 0, 0x1140, unimpl_commpage, CALL_INDIRECT),
-#endif
-};
-
-
-/********************************************************************
- * Commpage backdoor
- */
-static inline void print_commpage_entry(struct commpage_entry entry)
-{
- printf("@0x%x %s\n", entry.offset, entry.name);
-}
-
-static inline void install_commpage_backdoor_for_entry(struct commpage_entry entry)
-{
-#ifdef TARGET_I386
- char * commpage = (char*)(COMMPAGE_START+entry.offset);
- int c = 0;
- if(entry.options & HAS_PTR)
- {
- commpage[c++] = (COMMPAGE_START+entry.offset+4) & 0xff;
- commpage[c++] = ((COMMPAGE_START+entry.offset+4) >> 8) & 0xff;
- commpage[c++] = ((COMMPAGE_START+entry.offset+4) >> 16) & 0xff;
- commpage[c++] = ((COMMPAGE_START+entry.offset+4) >> 24) & 0xff;
- }
- commpage[c++] = 0xcd;
- commpage[c++] = 0x79; /* int 0x79 */
- commpage[c++] = 0xc3; /* ret */
-#else
- qerror("can't install the commpage on this arch\n");
-#endif
-}
-
-/********************************************************************
- * Commpage initialization
- */
-void commpage_init(void)
-{
-#if (defined(__i386__) ^ defined(TARGET_I386)) || (defined(_ARCH_PPC) ^ defined(TARGET_PPC))
- int i;
- void * commpage = (void *)target_mmap( COMMPAGE_START, COMMPAGE_SIZE,
- PROT_WRITE | PROT_READ, MAP_ANONYMOUS | MAP_FIXED, -1, 0);
- if((int)commpage != COMMPAGE_START)
- qerror("can't allocate the commpage\n");
-
- bzero(commpage, COMMPAGE_SIZE);
-
- /* XXX: commpage data not handled */
-
- for(i = 0; i < ARRAY_SIZE(commpage_entries); i++)
- install_commpage_backdoor_for_entry(commpage_entries[i]);
-#else
- /* simply map our pages so they can be executed
- XXX: we don't really want to do that since in the ppc on ppc situation we may
- not able to run commpages host optimized instructions (like G5's on a G5),
- hence this is sometimes a broken fix. */
- page_set_flags(COMMPAGE_START, COMMPAGE_START+COMMPAGE_SIZE, PROT_EXEC | PROT_READ | PAGE_VALID);
-#endif
-}
-
-/********************************************************************
- * Commpage implementation
- */
-void do_compare_and_swap32(void *cpu_env, int num)
-{
-#ifdef TARGET_I386
- uint32_t old = ((CPUX86State*)cpu_env)->regs[R_EAX];
- uint32_t *value = (uint32_t*)((CPUX86State*)cpu_env)->regs[R_ECX];
- DPRINTF("commpage: compare_and_swap32(%x,new,%p)\n", old, value);
-
- if(old == tswap32(*value))
- {
- uint32_t new = ((CPUX86State*)cpu_env)->regs[R_EDX];
- *value = tswap32(new);
- /* set zf flag */
- ((CPUX86State*)cpu_env)->eflags |= 0x40;
- }
- else
- {
- ((CPUX86State*)cpu_env)->regs[R_EAX] = tswap32(*value);
- /* unset zf flag */
- ((CPUX86State*)cpu_env)->eflags &= ~0x40;
- }
-#else
- qerror("do_compare_and_swap32 unimplemented");
-#endif
-}
-
-void do_compare_and_swap64(void *cpu_env, int num)
-{
-#ifdef TARGET_I386
- /* OSAtomicCompareAndSwap64 is not available on non 64 bits ppc, here is a raw implementation */
- uint64_t old, new, swapped_val;
- uint64_t *value = (uint64_t*)((CPUX86State*)cpu_env)->regs[R_ESI];
- old = (uint64_t)((uint64_t)((CPUX86State*)cpu_env)->regs[R_EDX]) << 32 | (uint64_t)((CPUX86State*)cpu_env)->regs[R_EAX];
-
- DPRINTF("commpage: compare_and_swap64(%" PRIx64 ",new,%p)\n", old, value);
- swapped_val = tswap64(*value);
-
- if(old == swapped_val)
- {
- new = (uint64_t)((uint64_t)((CPUX86State*)cpu_env)->regs[R_ECX]) << 32 | (uint64_t)((CPUX86State*)cpu_env)->regs[R_EBX];
- *value = tswap64(new);
- /* set zf flag */
- ((CPUX86State*)cpu_env)->eflags |= 0x40;
- }
- else
- {
- ((CPUX86State*)cpu_env)->regs[R_EAX] = (uint32_t)(swapped_val);
- ((CPUX86State*)cpu_env)->regs[R_EDX] = (uint32_t)(swapped_val >> 32);
- /* unset zf flag */
- ((CPUX86State*)cpu_env)->eflags &= ~0x40;
- }
-#else
- qerror("do_compare_and_swap64 unimplemented");
-#endif
-}
-
-void do_add_atomic_word32(void *cpu_env, int num)
-{
-#ifdef TARGET_I386
- uint32_t amt = ((CPUX86State*)cpu_env)->regs[R_EAX];
- uint32_t *value = (uint32_t*)((CPUX86State*)cpu_env)->regs[R_EDX];
- uint32_t swapped_value = tswap32(*value);
-
- DPRINTF("commpage: add_atomic_word32(%x,%p)\n", amt, value);
-
- /* old value in EAX */
- ((CPUX86State*)cpu_env)->regs[R_EAX] = swapped_value;
- *value = tswap32(swapped_value + amt);
-#else
- qerror("do_add_atomic_word32 unimplemented");
-#endif
-}
-
-void do_cgettimeofday(void *cpu_env, int num, uint32_t arg1)
-{
-#ifdef TARGET_I386
- extern int __commpage_gettimeofday(struct timeval *);
- DPRINTF("commpage: gettimeofday(0x%x)\n", arg1);
- struct timeval *time = (struct timeval *)arg1;
- int ret = __commpage_gettimeofday(time);
- tswap32s((uint32_t*)&time->tv_sec);
- tswap32s((uint32_t*)&time->tv_usec);
- ((CPUX86State*)cpu_env)->regs[R_EAX] = ret; /* Success */
-#else
- qerror("do_gettimeofday unimplemented");
-#endif
-}
-
-void do_nanotime(void *cpu_env, int num)
-{
-#ifdef TARGET_I386
- uint64_t t = mach_absolute_time();
- ((CPUX86State*)cpu_env)->regs[R_EAX] = (int)(t & 0xffffffff);
- ((CPUX86State*)cpu_env)->regs[R_EDX] = (int)((t >> 32) & 0xffffffff);
-#else
- qerror("do_nanotime unimplemented");
-#endif
-}
-
-void unimpl_commpage(void *cpu_env, int num)
-{
- qerror("qemu: commpage function 0x%x not implemented\n", num);
-}
-
-/********************************************************************
- * do_commpage - called by the main cpu loop
- */
-void
-do_commpage(void *cpu_env, int num, uint32_t arg1, uint32_t arg2, uint32_t arg3,
- uint32_t arg4, uint32_t arg5, uint32_t arg6, uint32_t arg7,
- uint32_t arg8)
-{
- int i, found = 0;
-
- arg1 = tswap32(arg1);
- arg2 = tswap32(arg2);
- arg3 = tswap32(arg3);
- arg4 = tswap32(arg4);
- arg5 = tswap32(arg5);
- arg6 = tswap32(arg6);
- arg7 = tswap32(arg7);
- arg8 = tswap32(arg8);
-
- num = num-COMMPAGE_START-2;
-
- for(i = 0; i < ARRAY_SIZE(commpage_entries); i++) {
- if( num == commpage_code_num(&commpage_entries[i]) )
- {
- DPRINTF("commpage: %s %s\n", commpage_entries[i].name, commpage_is_indirect(&commpage_entries[i]) ? "[indirect]" : "[direct]");
- found = 1;
- if(commpage_is_indirect(&commpage_entries[i]))
- {
- commpage_indirect_function_t function = (commpage_indirect_function_t)commpage_entries[i].function;
- function(cpu_env, num, arg1, arg2, arg3,
- arg4, arg5, arg6, arg7, arg8);
- }
- else
- {
- commpage_entries[i].function(arg1, arg2, arg3,
- arg4, arg5, arg6, arg7, arg8);
- }
- break;
- }
- }
-
- if(!found)
- {
- gemu_log("qemu: commpage function 0x%x not defined\n", num);
- gdb_handlesig (cpu_env, SIGTRAP);
- exit(-1);
- }
-}
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