#include <mono/metadata/mono-debug.h>
#include <mono/metadata/mono-debug-debugger.h>
#include <mono/metadata/monitor.h>
+#include <mono/metadata/gc-internal.h>
#include <mono/arch/x86/x86-codegen.h>
#include <mono/utils/memcheck.h>
#include "mini.h"
#include "mini-x86.h"
-static guint8* nullified_class_init_trampoline;
-
/*
* mono_arch_get_unbox_trampoline:
- * @gsctx: the generic sharing context
* @m: method pointer
* @addr: pointer to native code for @m
*
* unboxing before calling the method
*/
gpointer
-mono_arch_get_unbox_trampoline (MonoGenericSharingContext *gsctx, MonoMethod *m, gpointer addr)
+mono_arch_get_unbox_trampoline (MonoMethod *m, gpointer addr)
{
guint8 *code, *start;
- int this_pos = 4;
+ int this_pos = 4, size = NACL_SIZE(16, 32);
MonoDomain *domain = mono_domain_get ();
- start = code = mono_domain_code_reserve (domain, 16);
+ start = code = mono_domain_code_reserve (domain, size);
x86_alu_membase_imm (code, X86_ADD, X86_ESP, this_pos, sizeof (MonoObject));
x86_jump_code (code, addr);
- g_assert ((code - start) < 16);
+ g_assert ((code - start) < size);
+
+ nacl_domain_code_validate (domain, &start, size, &code);
return start;
}
MonoDomain *domain = mono_domain_get ();
- buf_len = 10;
+ buf_len = NACL_SIZE (10, 32);
start = code = mono_domain_code_reserve (domain, buf_len);
x86_jump_code (code, addr);
g_assert ((code - start) <= buf_len);
+ nacl_domain_code_validate (domain, &start, buf_len, &code);
mono_arch_flush_icache (start, code - start);
return start;
g_assert ((code - start) < buf_len);
+ nacl_domain_code_validate (domain, &start, buf_len, &code);
+
mono_arch_flush_icache (start, code - start);
return start;
void
mono_arch_patch_callsite (guint8 *method_start, guint8 *orig_code, guint8 *addr)
{
+#if defined(__default_codegen__)
guint8 *code;
guint8 buf [8];
gboolean can_write = mono_breakpoint_clean_code (method_start, orig_code, 8, buf, sizeof (buf));
*/
code -= 6;
orig_code -= 6;
- if ((code [1] == 0xe8)) {
+ if (code [1] == 0xe8) {
if (can_write) {
InterlockedExchange ((gint32*)(orig_code + 2), (guint)addr - ((guint)orig_code + 1) - 5);
code [4], code [5], code [6]);
g_assert_not_reached ();
}
+#elif defined(__native_client__)
+ /* Target must be bundle-aligned */
+ g_assert (((guint32)addr & kNaClAlignmentMask) == 0);
+
+ /* 0xe8 = call <DISP>, 0xe9 = jump <DISP> */
+ if ((orig_code [-5] == 0xe8) || orig_code [-6] == 0xe9) {
+ int ret;
+ gint32 offset = (gint32)addr - (gint32)orig_code;
+ guint8 buf[sizeof(gint32)];
+ *((gint32*)(buf)) = offset;
+ ret = nacl_dyncode_modify (orig_code - sizeof(gint32), buf, sizeof(gint32));
+ g_assert (ret == 0);
+ } else {
+ printf ("Invalid trampoline sequence %p: %02x %02x %02x %02x %02x\n", orig_code, orig_code [-5], orig_code [-4], orig_code [-3], orig_code [-2], orig_code[-1]);
+ g_assert_not_reached ();
+ }
+#endif
}
void
/* Patch the jump table entry used by the plt entry */
+#if defined(__native_client_codegen__) || defined(__native_client__)
+ /* for both compiler and runtime */
+ /* A PLT entry: */
+ /* mov <DISP>(%ebx), %ecx */
+ /* and 0xffffffe0, %ecx */
+ /* jmp *%ecx */
+ g_assert (code [0] == 0x8b);
+ g_assert (code [1] == 0x8b);
+
+ offset = *(guint32*)(code + 2);
+#elif defined(__default_codegen__)
/* A PLT entry: jmp *<DISP>(%ebx) */
g_assert (code [0] == 0xff);
g_assert (code [1] == 0xa3);
offset = *(guint32*)(code + 2);
-
+#endif /* __native_client_codegen__ */
if (!got)
got = (gpointer*)(gsize) regs [MONO_ARCH_GOT_REG];
*(guint8**)((guint8*)got + offset) = addr;
static gpointer
get_vcall_slot (guint8 *code, mgreg_t *regs, int *displacement)
{
- guint8 buf [8];
+ const int kBufSize = NACL_SIZE (8, 16);
+ guint8 buf [64];
guint8 reg = 0;
gint32 disp = 0;
- mono_breakpoint_clean_code (NULL, code, 8, buf, sizeof (buf));
+ mono_breakpoint_clean_code (NULL, code, kBufSize, buf, kBufSize);
code = buf + 8;
*displacement = 0;
- code -= 6;
-
if ((code [0] == 0xff) && ((code [1] & 0x18) == 0x10) && ((code [1] >> 6) == 2)) {
reg = code [1] & 0x07;
disp = *((gint32*)(code + 2));
+#if defined(__native_client_codegen__) || defined(__native_client__)
+ } else if ((code[1] == 0x83) && (code[2] == 0xe1) && (code[4] == 0xff) &&
+ (code[5] == 0xd1) && (code[-5] == 0x8b)) {
+ disp = *((gint32*)(code - 3));
+ reg = code[-4] & 0x07;
+ } else if ((code[-2] == 0x8b) && (code[1] == 0x83) && (code[4] == 0xff)) {
+ reg = code[-1] & 0x07;
+ disp = (signed char)code[0];
+#endif
} else {
g_assert_not_reached ();
return NULL;
{
guint8 buf [16];
gboolean can_write = mono_breakpoint_clean_code (NULL, code, 6, buf, sizeof (buf));
+ gpointer tramp = mini_get_nullified_class_init_trampoline ();
if (!can_write)
return;
code -= 5;
if (code [0] == 0xe8) {
+#if defined(__default_codegen__)
if (!mono_running_on_valgrind ()) {
guint32 ops;
/*
/* Tell valgrind to recompile the patched code */
//VALGRIND_DISCARD_TRANSLATIONS (code, 8);
}
+#elif defined(__native_client_codegen__)
+ mono_arch_patch_callsite (code, code + 5, tramp);
+#endif
} else if (code [0] == 0x90 || code [0] == 0xeb) {
/* Already changed by another thread */
;
vtable_slot = get_vcall_slot_addr (code + 5, regs);
g_assert (vtable_slot);
- *vtable_slot = nullified_class_init_trampoline;
+ *vtable_slot = tramp;
} else {
printf ("Invalid trampoline sequence: %x %x %x %x %x %x %x\n", code [0], code [1], code [2], code [3],
code [4], code [5], code [6]);
void
mono_arch_nullify_plt_entry (guint8 *code, mgreg_t *regs)
{
- if (mono_aot_only && !nullified_class_init_trampoline)
- nullified_class_init_trampoline = mono_aot_get_trampoline ("nullified_class_init_trampoline");
-
- mono_arch_patch_plt_entry (code, NULL, regs, nullified_class_init_trampoline);
+ mono_arch_patch_plt_entry (code, NULL, regs, mini_get_nullified_class_init_trampoline ());
}
guchar*
mono_arch_create_generic_trampoline (MonoTrampolineType tramp_type, MonoTrampInfo **info, gboolean aot)
{
+ char *tramp_name;
guint8 *buf, *code, *tramp;
int pushed_args, pushed_args_caller_saved;
GSList *unwind_ops = NULL;
g_assert (pushed_args == -1);
}
- x86_ret (code);
+ /*block guard trampolines are called with the stack aligned but must exit with the stack unaligned. */
+ if (tramp_type == MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD) {
+ x86_pop_reg (code, X86_EAX);
+ x86_alu_reg_imm (code, X86_ADD, X86_ESP, 0x8);
+ x86_jump_reg (code, X86_EAX);
+ } else {
+ x86_ret (code);
+ }
+ nacl_global_codeman_validate (&buf, 256, &code);
g_assert ((code - buf) <= 256);
- if (info)
- *info = mono_tramp_info_create (mono_get_generic_trampoline_name (tramp_type), buf, code - buf, ji, unwind_ops);
-
- if (tramp_type == MONO_TRAMPOLINE_CLASS_INIT) {
- /* Initialize the nullified class init trampoline used in the AOT case */
- nullified_class_init_trampoline = mono_arch_get_nullified_class_init_trampoline (NULL);
+ if (info) {
+ tramp_name = mono_get_generic_trampoline_name (tramp_type);
+ *info = mono_tramp_info_create (tramp_name, buf, code - buf, ji, unwind_ops);
+ g_free (tramp_name);
}
return buf;
mono_arch_get_nullified_class_init_trampoline (MonoTrampInfo **info)
{
guint8 *code, *buf;
+ int tramp_size = NACL_SIZE (16, kNaClAlignment);
- code = buf = mono_global_codeman_reserve (16);
+ code = buf = mono_global_codeman_reserve (tramp_size);
x86_ret (code);
+ nacl_global_codeman_validate (&buf, tramp_size, &code);
+
mono_arch_flush_icache (buf, code - buf);
if (info)
- *info = mono_tramp_info_create (g_strdup_printf ("nullified_class_init_trampoline"), buf, code - buf, NULL, NULL);
+ *info = mono_tramp_info_create ("nullified_class_init_trampoline", buf, code - buf, NULL, NULL);
return buf;
}
tramp = mono_get_trampoline_code (tramp_type);
- code = buf = mono_domain_code_reserve_align (domain, TRAMPOLINE_SIZE, 4);
+ code = buf = mono_domain_code_reserve_align (domain, TRAMPOLINE_SIZE, NACL_SIZE (4, kNaClAlignment));
x86_push_imm (buf, arg1);
x86_jump_code (buf, tramp);
g_assert ((buf - code) <= TRAMPOLINE_SIZE);
+ nacl_domain_code_validate (domain, &code, NACL_SIZE (4, kNaClAlignment), &buf);
+
mono_arch_flush_icache (code, buf - code);
if (code_len)
index -= size - 1;
}
+#if defined(__default_codegen__)
tramp_size = (aot ? 64 : 36) + 6 * depth;
+#elif defined(__native_client_codegen__)
+ tramp_size = (aot ? 64 : 36) + 2 * kNaClAlignment +
+ 6 * (depth + kNaClAlignment);
+#endif
code = buf = mono_global_codeman_reserve (tramp_size);
x86_jump_code (code, tramp);
}
+ nacl_global_codeman_validate (&buf, tramp_size, &code);
+ mono_arch_flush_icache (buf, code - buf);
+
+ g_assert (code - buf <= tramp_size);
+
+ if (info) {
+ char *name = mono_get_rgctx_fetch_trampoline_name (slot);
+ *info = mono_tramp_info_create (name, buf, code - buf, ji, unwind_ops);
+ g_free (name);
+ }
+
+ return buf;
+}
+
+/*
+ * mono_arch_create_general_rgctx_lazy_fetch_trampoline:
+ *
+ * This is a general variant of the rgctx fetch trampolines. It receives a pointer to gpointer[2] in the rgctx reg. The first entry contains the slot, the second
+ * the trampoline to call if the slot is not filled.
+ */
+gpointer
+mono_arch_create_general_rgctx_lazy_fetch_trampoline (MonoTrampInfo **info, gboolean aot)
+{
+ guint8 *code, *buf;
+ int tramp_size;
+ MonoJumpInfo *ji = NULL;
+ GSList *unwind_ops = NULL;
+
+ g_assert (aot);
+
+ unwind_ops = mono_arch_get_cie_program ();
+
+ tramp_size = 64;
+
+ code = buf = mono_global_codeman_reserve (tramp_size);
+
+ // FIXME: Currently, we always go to the slow path.
+
+ /* Load trampoline addr */
+ x86_mov_reg_membase (code, X86_EAX, MONO_ARCH_RGCTX_REG, 4, 4);
+ /* Load mrgctx/vtable */
+ x86_mov_reg_membase (code, MONO_ARCH_VTABLE_REG, X86_ESP, 4, 4);
+
+ x86_jump_reg (code, X86_EAX);
+
+ nacl_global_codeman_validate (&buf, tramp_size, &code);
mono_arch_flush_icache (buf, code - buf);
g_assert (code - buf <= tramp_size);
if (info)
- *info = mono_tramp_info_create (mono_get_rgctx_fetch_trampoline_name (slot), buf, code - buf, ji, unwind_ops);
+ *info = mono_tramp_info_create ("rgctx_fetch_trampoline_general", buf, code - buf, ji, unwind_ops);
return buf;
}
mono_arch_flush_icache (code, code - buf);
g_assert (code - buf <= tramp_size);
+#ifdef __native_client_codegen__
+ g_assert (code - buf <= kNaClAlignment);
+#endif
+
+ nacl_global_codeman_validate (&buf, tramp_size, &code);
if (info)
- *info = mono_tramp_info_create (g_strdup_printf ("generic_class_init_trampoline"), buf, code - buf, ji, unwind_ops);
+ *info = mono_tramp_info_create ("generic_class_init_trampoline", buf, code - buf, ji, unwind_ops);
return buf;
}
{
guint8 *tramp = mono_get_trampoline_code (MONO_TRAMPOLINE_MONITOR_ENTER);
guint8 *code, *buf;
- guint8 *jump_obj_null, *jump_sync_null, *jump_other_owner, *jump_cmpxchg_failed, *jump_tid;
+ guint8 *jump_obj_null, *jump_sync_null, *jump_other_owner, *jump_cmpxchg_failed, *jump_tid, *jump_sync_thin_hash = NULL;
int tramp_size;
int owner_offset, nest_offset, dummy;
MonoJumpInfo *ji = NULL;
owner_offset = MONO_THREADS_SYNC_MEMBER_OFFSET (owner_offset);
nest_offset = MONO_THREADS_SYNC_MEMBER_OFFSET (nest_offset);
- tramp_size = 64;
+ tramp_size = NACL_SIZE (96, 128);
code = buf = mono_global_codeman_reserve (tramp_size);
/* load obj->synchronization to ECX */
x86_mov_reg_membase (code, X86_ECX, X86_EAX, G_STRUCT_OFFSET (MonoObject, synchronisation), 4);
+
+ if (mono_gc_is_moving ()) {
+ /*if bit zero is set it's a thin hash*/
+ /*FIXME use testb encoding*/
+ x86_test_reg_imm (code, X86_ECX, 0x01);
+ jump_sync_thin_hash = code;
+ x86_branch8 (code, X86_CC_NE, -1, 1);
+
+ /*clear bits used by the gc*/
+ x86_alu_reg_imm (code, X86_AND, X86_ECX, ~0x3);
+ }
+
/* is synchronization null? */
x86_test_reg_reg (code, X86_ECX, X86_ECX);
+
/* if yes, jump to actual trampoline */
jump_sync_null = code;
x86_branch8 (code, X86_CC_Z, -1, 1);
/* load MonoInternalThread* into EDX */
- code = mono_x86_emit_tls_get (code, X86_EDX, mono_thread_get_tls_offset ());
+ if (aot) {
+ /* load_aotconst () puts the result into EAX */
+ x86_mov_reg_reg (code, X86_EDX, X86_EAX, sizeof (mgreg_t));
+ code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_TLS_OFFSET, GINT_TO_POINTER (TLS_KEY_THREAD));
+ code = mono_x86_emit_tls_get_reg (code, X86_EAX, X86_EAX);
+ x86_xchg_reg_reg (code, X86_EAX, X86_EDX, sizeof (mgreg_t));
+ } else {
+ code = mono_x86_emit_tls_get (code, X86_EDX, mono_thread_get_tls_offset ());
+ }
/* load TID into EDX */
x86_mov_reg_membase (code, X86_EDX, X86_EDX, G_STRUCT_OFFSET (MonoInternalThread, tid), 4);
/* push obj */
x86_patch (jump_obj_null, code);
+ if (jump_sync_thin_hash)
+ x86_patch (jump_sync_thin_hash, code);
x86_patch (jump_sync_null, code);
x86_patch (jump_other_owner, code);
x86_push_reg (code, X86_EAX);
mono_arch_flush_icache (buf, code - buf);
g_assert (code - buf <= tramp_size);
+ nacl_global_codeman_validate (&buf, tramp_size, &code);
+
if (info)
- *info = mono_tramp_info_create (g_strdup_printf ("monitor_enter_trampoline"), buf, code - buf, ji, unwind_ops);
+ *info = mono_tramp_info_create ("monitor_enter_trampoline", buf, code - buf, ji, unwind_ops);
return buf;
}
{
guint8 *tramp = mono_get_trampoline_code (MONO_TRAMPOLINE_MONITOR_EXIT);
guint8 *code, *buf;
- guint8 *jump_obj_null, *jump_have_waiters, *jump_sync_null, *jump_not_owned;
+ guint8 *jump_obj_null, *jump_have_waiters, *jump_sync_null, *jump_not_owned, *jump_sync_thin_hash = NULL;
guint8 *jump_next;
int tramp_size;
int owner_offset, nest_offset, entry_count_offset;
nest_offset = MONO_THREADS_SYNC_MEMBER_OFFSET (nest_offset);
entry_count_offset = MONO_THREADS_SYNC_MEMBER_OFFSET (entry_count_offset);
- tramp_size = 64;
+ tramp_size = NACL_SIZE (96, 128);
code = buf = mono_global_codeman_reserve (tramp_size);
/* load obj->synchronization to ECX */
x86_mov_reg_membase (code, X86_ECX, X86_EAX, G_STRUCT_OFFSET (MonoObject, synchronisation), 4);
+
+ if (mono_gc_is_moving ()) {
+ /*if bit zero is set it's a thin hash*/
+ /*FIXME use testb encoding*/
+ x86_test_reg_imm (code, X86_ECX, 0x01);
+ jump_sync_thin_hash = code;
+ x86_branch8 (code, X86_CC_NE, -1, 1);
+
+ /*clear bits used by the gc*/
+ x86_alu_reg_imm (code, X86_AND, X86_ECX, ~0x3);
+ }
+
/* is synchronization null? */
x86_test_reg_reg (code, X86_ECX, X86_ECX);
/* if yes, jump to actual trampoline */
/* next case: synchronization is not null */
/* load MonoInternalThread* into EDX */
- code = mono_x86_emit_tls_get (code, X86_EDX, mono_thread_get_tls_offset ());
+ if (aot) {
+ /* load_aotconst () puts the result into EAX */
+ x86_mov_reg_reg (code, X86_EDX, X86_EAX, sizeof (mgreg_t));
+ code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_TLS_OFFSET, GINT_TO_POINTER (TLS_KEY_THREAD));
+ code = mono_x86_emit_tls_get_reg (code, X86_EAX, X86_EAX);
+ x86_xchg_reg_reg (code, X86_EAX, X86_EDX, sizeof (mgreg_t));
+ } else {
+ code = mono_x86_emit_tls_get (code, X86_EDX, mono_thread_get_tls_offset ());
+ }
/* load TID into EDX */
x86_mov_reg_membase (code, X86_EDX, X86_EDX, G_STRUCT_OFFSET (MonoInternalThread, tid), 4);
/* is synchronization->owner == TID */
/* push obj and jump to the actual trampoline */
x86_patch (jump_obj_null, code);
+ if (jump_sync_thin_hash)
+ x86_patch (jump_sync_thin_hash, code);
x86_patch (jump_have_waiters, code);
x86_patch (jump_not_owned, code);
x86_patch (jump_sync_null, code);
x86_jump_code (code, tramp);
}
+ nacl_global_codeman_validate (&buf, tramp_size, &code);
+
mono_arch_flush_icache (buf, code - buf);
g_assert (code - buf <= tramp_size);
if (info)
- *info = mono_tramp_info_create (g_strdup_printf ("monitor_exit_trampoline"), buf, code - buf, ji, unwind_ops);
+ *info = mono_tramp_info_create ("monitor_exit_trampoline", buf, code - buf, ji, unwind_ops);
return buf;
}
x86_call_code (code, (guint8*)func);
}
-static void
-handler_block_trampoline_helper (gpointer *ptr)
+static gpointer
+handler_block_trampoline_helper (void)
{
- MonoJitTlsData *jit_tls = TlsGetValue (mono_jit_tls_id);
- *ptr = jit_tls->handler_block_return_address;
+ MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
+ return jit_tls->handler_block_return_address;
}
gpointer
This trampoline restore the call chain of the handler block then jumps into the code that deals with it.
*/
+ /*
+ * We are in a method frame after the call emitted by OP_CALL_HANDLER.
+ */
+
if (mono_get_jit_tls_offset () != -1) {
code = mono_x86_emit_tls_get (code, X86_EAX, mono_get_jit_tls_offset ());
x86_mov_reg_membase (code, X86_EAX, X86_EAX, G_STRUCT_OFFSET (MonoJitTlsData, handler_block_return_address), 4);
- /*simulate a call*/
- x86_push_reg (code, X86_EAX);
- x86_jump_code (code, tramp);
} else {
/*Slow path uses a c helper*/
- x86_push_reg (code, X86_ESP);
- x86_push_imm (code, tramp);
- x86_jump_code (code, handler_block_trampoline_helper);
+ x86_call_code (code, handler_block_trampoline_helper);
}
+ /* Simulate a call */
+ /*Fix stack alignment*/
+ x86_alu_reg_imm (code, X86_SUB, X86_ESP, 0x4);
+ /* This is the address the trampoline will return to */
+ x86_push_reg (code, X86_EAX);
+ /* Dummy trampoline argument, since we call the generic trampoline directly */
+ x86_push_imm (code, 0);
+ x86_jump_code (code, tramp);
+
+ nacl_global_codeman_validate (&buf, tramp_size, &code);
mono_arch_flush_icache (buf, code - buf);
g_assert (code - buf <= tramp_size);
+ if (mono_jit_map_is_enabled ())
+ mono_emit_jit_tramp (buf, code - buf, "handler_block_trampoline");
+
return buf;
}
guint32
mono_arch_get_plt_info_offset (guint8 *plt_entry, mgreg_t *regs, guint8 *code)
{
- return *(guint32*)(plt_entry + 6);
+ return *(guint32*)(plt_entry + NACL_SIZE (6, 12));
+}
+
+/*
+ * mono_arch_get_gsharedvt_arg_trampoline:
+ *
+ * Return a trampoline which passes ARG to the gsharedvt in/out trampoline ADDR.
+ */
+gpointer
+mono_arch_get_gsharedvt_arg_trampoline (MonoDomain *domain, gpointer arg, gpointer addr)
+{
+ guint8 *code, *start;
+ int buf_len;
+
+ buf_len = 10;
+
+ start = code = mono_domain_code_reserve (domain, buf_len);
+
+ x86_mov_reg_imm (code, X86_EAX, arg);
+ x86_jump_code (code, addr);
+ g_assert ((code - start) <= buf_len);
+
+ nacl_domain_code_validate (domain, &start, buf_len, &code);
+ mono_arch_flush_icache (start, code - start);
+
+ return start;
+}
+
+#if defined(MONO_GSHARING)
+
+#include "../../../mono-extensions/mono/mini/tramp-x86-gsharedvt.c"
+
+#else
+
+gpointer
+mono_arch_get_gsharedvt_trampoline (MonoTrampInfo **info, gboolean aot)
+{
+ if (info)
+ *info = NULL;
+ return NULL;
}
+
+#endif /* !MONOTOUCH */
projects / mono.git / blobdiff