--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/symbian-qemu-0.9.1-12/qemu-symbian-svp/darwin-user/commpage.c Fri Jul 31 15:01:17 2009 +0100
@@ -0,0 +1,358 @@
+ /*
+ * 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, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#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 { if(loglevel) fprintf(logfile, __VA_ARGS__); printf(__VA_ARGS__); } while(0)
+#else
+# define DPRINTF(...) do { if(loglevel) fprintf(logfile, __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(__powerpc__) ^ 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(value && 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(%llx,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);
+ }
+}