diff options
Diffstat (limited to 'darwin-user/commpage.c')
| -rw-r--r-- | darwin-user/commpage.c | 357 |
1 files changed, 0 insertions, 357 deletions
diff --git a/darwin-user/commpage.c b/darwin-user/commpage.c deleted file mode 100644 index cc29bddd95..0000000000 --- a/darwin-user/commpage.c +++ /dev/null @@ -1,357 +0,0 @@ - /* - * 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); - } -} |