#include <mono/metadata/marshal.h>
#include <mono/metadata/tabledefs.h>
#include <mono/metadata/mono-debug-debugger.h>
-#include <mono/metadata/monitor.h>
#include <mono/metadata/profiler-private.h>
#include <mono/metadata/gc-internal.h>
#include <mono/arch/amd64/amd64-codegen.h>
#include "mini.h"
#include "mini-amd64.h"
+#include "debugger-agent.h"
#if defined(__native_client_codegen__) && defined(__native_client__)
#include <malloc.h>
#include <nacl/nacl_dyncode.h>
#endif
+#define ALIGN_TO(val,align) ((((guint64)val) + ((align) - 1)) & ~((align) - 1))
+
#define IS_REX(inst) (((inst) >= 0x40) && ((inst) <= 0x4f))
/*
mono_arch_get_unbox_trampoline (MonoMethod *m, gpointer addr)
{
guint8 *code, *start;
+ GSList *unwind_ops;
int this_reg, size = NACL_SIZE (20, 32);
MonoDomain *domain = mono_domain_get ();
start = code = mono_domain_code_reserve (domain, size);
+ unwind_ops = mono_arch_get_cie_program ();
+
amd64_alu_reg_imm (code, X86_ADD, this_reg, sizeof (MonoObject));
/* FIXME: Optimize this */
amd64_mov_reg_imm (code, AMD64_RAX, addr);
mono_arch_flush_icache (start, code - start);
mono_profiler_code_buffer_new (start, code - start, MONO_PROFILER_CODE_BUFFER_UNBOX_TRAMPOLINE, m);
+ mono_tramp_info_register (mono_tramp_info_create (NULL, start, code - start, NULL, unwind_ops), domain);
+
return start;
}
mono_arch_get_static_rgctx_trampoline (MonoMethod *m, MonoMethodRuntimeGenericContext *mrgctx, gpointer addr)
{
guint8 *code, *start;
+ GSList *unwind_ops;
int buf_len;
MonoDomain *domain = mono_domain_get ();
start = code = mono_domain_code_reserve (domain, buf_len);
+ unwind_ops = mono_arch_get_cie_program ();
+
amd64_mov_reg_imm (code, MONO_ARCH_RGCTX_REG, mrgctx);
amd64_jump_code (code, addr);
g_assert ((code - start) < buf_len);
mono_arch_flush_icache (start, code - start);
mono_profiler_code_buffer_new (start, code - start, MONO_PROFILER_CODE_BUFFER_GENERICS_TRAMPOLINE, NULL);
+ mono_tramp_info_register (mono_tramp_info_create (NULL, start, code - start, NULL, unwind_ops), domain);
+
return start;
}
return start;
}
+#ifdef _WIN64
+// Workaround lack of Valgrind support for 64-bit Windows
+#define VALGRIND_DISCARD_TRANSLATIONS(...)
+#endif
+
/*
* mono_arch_patch_callsite:
*
gboolean disp_32bit = ((((gint64)addr - (gint64)orig_code)) < (1 << 30)) && ((((gint64)addr - (gint64)orig_code)) > -(1 << 30));
if ((((guint64)(addr)) >> 32) != 0 && !disp_32bit) {
-#ifdef MONO_ARCH_NOMAP32BIT
- /* Print some diagnostics */
- MonoJitInfo *ji = mono_jit_info_table_find (mono_domain_get (), (char*)orig_code);
- if (ji)
- fprintf (stderr, "At %s, offset 0x%zx\n", mono_method_full_name (jinfo_get_method (ji), TRUE), (guint8*)orig_code - (guint8*)ji->code_start);
- fprintf (stderr, "Addr: %p\n", addr);
- ji = mono_jit_info_table_find (mono_domain_get (), (char*)addr);
- if (ji)
- fprintf (stderr, "Callee: %s\n", mono_method_full_name (jinfo_get_method (ji), TRUE));
- g_assert_not_reached ();
-#else
/*
- * This might happen when calling AOTed code. Create a thunk.
+ * This might happen with LLVM or when calling AOTed code. Create a thunk.
*/
guint8 *thunk_start, *thunk_code;
g_assert ((((guint64)(addr)) >> 32) == 0);
mono_arch_flush_icache (thunk_start, thunk_code - thunk_start);
mono_profiler_code_buffer_new (thunk_start, thunk_code - thunk_start, MONO_PROFILER_CODE_BUFFER_HELPER, NULL);
-#endif
}
if (can_write) {
InterlockedExchange ((gint32*)(orig_code - 4), ((gint64)addr - (gint64)orig_code));
#endif /* __native_client_codegen__ */
-
InterlockedExchangePointer (plt_jump_table_entry, addr);
}
-static gpointer
-get_vcall_slot (guint8 *code, mgreg_t *regs, int *displacement)
-{
- guint8 buf [10];
- gint32 disp;
- MonoJitInfo *ji = NULL;
-
-#ifdef ENABLE_LLVM
- /* code - 9 might be before the start of the method */
- /* FIXME: Avoid this expensive call somehow */
- ji = mono_jit_info_table_find (mono_domain_get (), (char*)code);
-#endif
-
- mono_breakpoint_clean_code (ji ? ji->code_start : NULL, code, 9, buf, sizeof (buf));
- code = buf + 9;
-
- *displacement = 0;
-
- code -= 7;
-
- if ((code [0] == 0x41) && (code [1] == 0xff) && (code [2] == 0x15)) {
- /* call OFFSET(%rip) */
- g_assert_not_reached ();
- *displacement = *(guint32*)(code + 3);
- return (gpointer*)(code + disp + 7);
- } else {
- g_assert_not_reached ();
- return NULL;
- }
-}
-
-static gpointer*
-get_vcall_slot_addr (guint8* code, mgreg_t *regs)
-{
- gpointer vt;
- int displacement;
- vt = get_vcall_slot (code, regs, &displacement);
- if (!vt)
- return NULL;
- return (gpointer*)((char*)vt + displacement);
-}
-
-void
-mono_arch_nullify_class_init_trampoline (guint8 *code, mgreg_t *regs)
-{
- guint8 buf [16];
- MonoJitInfo *ji = NULL;
- gboolean can_write;
- gpointer tramp = mini_get_nullified_class_init_trampoline ();
-
- if (mono_use_llvm) {
- /* code - 7 might be before the start of the method */
- /* FIXME: Avoid this expensive call somehow */
- ji = mono_jit_info_table_find (mono_domain_get (), (char*)code);
- }
-
- can_write = mono_breakpoint_clean_code (ji ? ji->code_start : NULL, code, 7, buf, sizeof (buf));
-
- if (!can_write)
- return;
-
- /*
- * A given byte sequence can match more than case here, so we have to be
- * really careful about the ordering of the cases. Longer sequences
- * come first.
- */
- if ((buf [0] == 0x41) && (buf [1] == 0xff) && (buf [2] == 0x15)) {
- gpointer *vtable_slot;
-
- /* call *<OFFSET>(%rip) */
- vtable_slot = get_vcall_slot_addr (code, regs);
- g_assert (vtable_slot);
-
- *vtable_slot = tramp;
- } else if (buf [2] == 0xe8) {
- /* call <TARGET> */
- //guint8 *buf = code - 2;
-
- /*
- * It would be better to replace the call with nops, but that doesn't seem
- * to work on SMP machines even when the whole call is inside a cache line.
- * Patching the call address seems to work.
- */
- /*
- buf [0] = 0x66;
- buf [1] = 0x66;
- buf [2] = 0x90;
- buf [3] = 0x66;
- buf [4] = 0x90;
- */
-
- mono_arch_patch_callsite (code - 5, code, tramp);
- } else if ((buf [5] == 0xff) && x86_modrm_mod (buf [6]) == 3 && x86_modrm_reg (buf [6]) == 2) {
- /* call *<reg> */
- /* Generated by the LLVM JIT or on platforms without MAP_32BIT set */
- mono_arch_patch_callsite (code - 13, code, tramp);
- } else if (buf [4] == 0x90 || buf [5] == 0xeb || buf [6] == 0x66) {
- /* Already changed by another thread */
- ;
- } else {
- printf ("Invalid trampoline sequence: %x %x %x %x %x %x %x\n", buf [0], buf [1], buf [2], buf [3],
- buf [4], buf [5], buf [6]);
- g_assert_not_reached ();
- }
-}
-
static void
stack_unaligned (MonoTrampolineType tramp_type)
{
{
char *tramp_name;
guint8 *buf, *code, *tramp, *br [2], *r11_save_code, *after_r11_save_code;
- int i, lmf_offset, offset, res_offset, arg_offset, rax_offset, tramp_offset, saved_regs_offset;
- int saved_fpregs_offset, rbp_offset, framesize, orig_rsp_to_rbp_offset, cfa_offset;
+ int i, lmf_offset, offset, res_offset, arg_offset, rax_offset, tramp_offset, ctx_offset, saved_regs_offset;
+ int r11_save_offset, saved_fpregs_offset, rbp_offset, framesize, orig_rsp_to_rbp_offset, cfa_offset;
gboolean has_caller;
GSList *unwind_ops = NULL;
MonoJumpInfo *ji = NULL;
code = buf = mono_global_codeman_reserve (kMaxCodeSize);
- framesize = kMaxCodeSize + sizeof (MonoLMFTramp);
- framesize = (framesize + (MONO_ARCH_FRAME_ALIGNMENT - 1)) & ~ (MONO_ARCH_FRAME_ALIGNMENT - 1);
+ /* Compute stack frame size and offsets */
+ offset = 0;
+ rbp_offset = -offset;
- orig_rsp_to_rbp_offset = 0;
- r11_save_code = code;
- /* Reserve 5 bytes for the mov_membase_reg to save R11 */
- code += 5;
- after_r11_save_code = code;
+ offset += sizeof(mgreg_t);
+ rax_offset = -offset;
+
+ offset += sizeof(mgreg_t);
+ r11_save_offset = -offset;
+
+ offset += sizeof(mgreg_t);
+ tramp_offset = -offset;
+
+ offset += sizeof(gpointer);
+ arg_offset = -offset;
+
+ offset += sizeof(mgreg_t);
+ res_offset = -offset;
+
+ offset += sizeof (MonoContext);
+ ctx_offset = -offset;
+ saved_regs_offset = ctx_offset + MONO_STRUCT_OFFSET (MonoContext, gregs);
+ saved_fpregs_offset = ctx_offset + MONO_STRUCT_OFFSET (MonoContext, fregs);
+
+ offset += sizeof (MonoLMFTramp);
+ lmf_offset = -offset;
+
+#ifdef TARGET_WIN32
+ /* Reserve space where the callee can save the argument registers */
+ offset += 4 * sizeof (mgreg_t);
+#endif
+
+ framesize = ALIGN_TO (offset, MONO_ARCH_FRAME_ALIGNMENT);
// CFA = sp + 16 (the trampoline address is on the stack)
cfa_offset = 16;
// IP saved at CFA - 8
mono_add_unwind_op_offset (unwind_ops, code, buf, AMD64_RIP, -8);
+ orig_rsp_to_rbp_offset = 0;
+ r11_save_code = code;
+ /* Reserve space for the mov_membase_reg to save R11 */
+ code += 5;
+ after_r11_save_code = code;
+
/* Pop the return address off the stack */
amd64_pop_reg (code, AMD64_R11);
orig_rsp_to_rbp_offset += sizeof(mgreg_t);
mono_add_unwind_op_def_cfa_reg (unwind_ops, code, buf, AMD64_RBP);
amd64_alu_reg_imm (code, X86_SUB, AMD64_RSP, framesize);
- offset = 0;
- rbp_offset = - offset;
-
- offset += sizeof(mgreg_t);
- rax_offset = - offset;
-
- offset += sizeof(mgreg_t);
- tramp_offset = - offset;
-
- offset += sizeof(gpointer);
- arg_offset = - offset;
-
/* Compute the trampoline address from the return address */
if (aot) {
#if defined(__default_codegen__)
}
amd64_mov_membase_reg (code, AMD64_RBP, tramp_offset, AMD64_R11, sizeof(gpointer));
- offset += sizeof(mgreg_t);
- res_offset = - offset;
-
/* Save all registers */
-
- offset += AMD64_NREG * sizeof(mgreg_t);
- saved_regs_offset = - offset;
for (i = 0; i < AMD64_NREG; ++i) {
if (i == AMD64_RBP) {
/* RAX is already saved */
amd64_mov_reg_membase (code, AMD64_RAX, AMD64_RBP, rbp_offset, sizeof(mgreg_t));
amd64_mov_membase_reg (code, AMD64_RBP, saved_regs_offset + (i * sizeof(mgreg_t)), AMD64_RAX, sizeof(mgreg_t));
+ } else if (i == AMD64_RIP) {
+ if (has_caller)
+ amd64_mov_reg_membase (code, AMD64_R11, AMD64_RBP, 8, sizeof(gpointer));
+ else
+ amd64_mov_reg_imm (code, AMD64_R11, 0);
+ amd64_mov_membase_reg (code, AMD64_RBP, saved_regs_offset + (i * sizeof(mgreg_t)), AMD64_R11, sizeof(mgreg_t));
+ } else if (i == AMD64_RSP) {
+ amd64_mov_reg_reg (code, AMD64_R11, AMD64_RSP, sizeof(mgreg_t));
+ amd64_alu_reg_imm (code, X86_ADD, AMD64_R11, framesize + 16);
+ amd64_mov_membase_reg (code, AMD64_RBP, saved_regs_offset + (i * sizeof(mgreg_t)), AMD64_R11, sizeof(mgreg_t));
} else if (i != AMD64_R11) {
amd64_mov_membase_reg (code, AMD64_RBP, saved_regs_offset + (i * sizeof(mgreg_t)), i, sizeof(mgreg_t));
} else {
/* We have to save R11 right at the start of
the trampoline code because it's used as a
scratch register */
- amd64_mov_membase_reg (r11_save_code, AMD64_RSP, saved_regs_offset + orig_rsp_to_rbp_offset + (i * sizeof(mgreg_t)), i, sizeof(mgreg_t));
+ /* This happens before the frame is set up, so it goes into the redzone */
+ amd64_mov_membase_reg (r11_save_code, AMD64_RSP, r11_save_offset + orig_rsp_to_rbp_offset, i, sizeof(mgreg_t));
g_assert (r11_save_code == after_r11_save_code);
+
+ /* Copy from the save slot into the register array slot */
+ amd64_mov_reg_membase (code, i, AMD64_RSP, r11_save_offset + orig_rsp_to_rbp_offset, sizeof(mgreg_t));
+ amd64_mov_membase_reg (code, AMD64_RBP, saved_regs_offset + (i * sizeof(mgreg_t)), i, sizeof(mgreg_t));
}
}
- offset += 8 * sizeof(mgreg_t);
- saved_fpregs_offset = - offset;
for (i = 0; i < 8; ++i)
amd64_movsd_membase_reg (code, AMD64_RBP, saved_fpregs_offset + (i * sizeof(mgreg_t)), i);
//amd64_breakpoint (code);
#endif
- if (tramp_type != MONO_TRAMPOLINE_GENERIC_CLASS_INIT &&
- tramp_type != MONO_TRAMPOLINE_MONITOR_ENTER &&
- tramp_type != MONO_TRAMPOLINE_MONITOR_ENTER_V4 &&
- tramp_type != MONO_TRAMPOLINE_MONITOR_EXIT &&
- tramp_type != MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD) {
+ if (tramp_type != MONO_TRAMPOLINE_HANDLER_BLOCK_GUARD) {
/* Obtain the trampoline argument which is encoded in the instruction stream */
if (aot) {
/* Load the GOT offset */
/* Save LMF begin */
- offset += sizeof (MonoLMFTramp);
- lmf_offset = - offset;
-
/* Save ip */
if (has_caller)
amd64_mov_reg_membase (code, AMD64_R11, AMD64_RBP, 8, sizeof(gpointer));
else
amd64_mov_reg_imm (code, AMD64_R11, 0);
amd64_mov_membase_reg (code, AMD64_RBP, lmf_offset + MONO_STRUCT_OFFSET (MonoLMF, rip), AMD64_R11, sizeof(mgreg_t));
- /* Save fp */
- amd64_mov_reg_membase (code, AMD64_R11, AMD64_RSP, framesize, sizeof(mgreg_t));
- amd64_mov_membase_reg (code, AMD64_RBP, lmf_offset + MONO_STRUCT_OFFSET (MonoLMF, rbp), AMD64_R11, sizeof(mgreg_t));
/* Save sp */
amd64_mov_reg_reg (code, AMD64_R11, AMD64_RSP, sizeof(mgreg_t));
amd64_alu_reg_imm (code, X86_ADD, AMD64_R11, framesize + 16);
amd64_mov_membase_reg (code, AMD64_RBP, lmf_offset + MONO_STRUCT_OFFSET (MonoLMF, rsp), AMD64_R11, sizeof(mgreg_t));
- /* Save pointer to registers */
- amd64_lea_membase (code, AMD64_R11, AMD64_RBP, saved_regs_offset);
- amd64_mov_membase_reg (code, AMD64_RBP, lmf_offset + MONO_STRUCT_OFFSET (MonoLMFTramp, regs), AMD64_R11, sizeof(mgreg_t));
+ /* Save pointer to context */
+ amd64_lea_membase (code, AMD64_R11, AMD64_RBP, ctx_offset);
+ amd64_mov_membase_reg (code, AMD64_RBP, lmf_offset + MONO_STRUCT_OFFSET (MonoLMFTramp, ctx), AMD64_R11, sizeof(mgreg_t));
if (aot) {
code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_JIT_ICALL_ADDR, "mono_get_lmf_addr");
for (i = 0; i < AMD64_NREG; ++i)
if (AMD64_IS_ARGUMENT_REG (i) || i == AMD64_R10 || i == AMD64_RAX)
amd64_mov_reg_membase (code, i, AMD64_RBP, saved_regs_offset + (i * sizeof(mgreg_t)), sizeof(mgreg_t));
-
for (i = 0; i < 8; ++i)
amd64_movsd_reg_membase (code, i, AMD64_RBP, saved_fpregs_offset + (i * sizeof(mgreg_t)));
/* Restore stack */
amd64_leave (code);
+ cfa_offset -= sizeof (mgreg_t);
+ mono_add_unwind_op_def_cfa (unwind_ops, code, buf, AMD64_RSP, cfa_offset);
+
if (MONO_TRAMPOLINE_TYPE_MUST_RETURN (tramp_type)) {
/* Load result */
mono_arch_flush_icache (buf, code - buf);
mono_profiler_code_buffer_new (buf, code - buf, MONO_PROFILER_CODE_BUFFER_HELPER, 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;
-}
-
-gpointer
-mono_arch_get_nullified_class_init_trampoline (MonoTrampInfo **info)
-{
- guint8 *code, *buf;
- int size = NACL_SIZE (16, 32);
-
- code = buf = mono_global_codeman_reserve (size);
- amd64_ret (code);
-
- nacl_global_codeman_validate(&buf, size, &code);
-
- mono_arch_flush_icache (buf, code - buf);
- mono_profiler_code_buffer_new (buf, code - buf, MONO_PROFILER_CODE_BUFFER_HELPER, NULL);
-
- if (info)
- *info = mono_tramp_info_create ("nullified_class_init_trampoline", buf, code - buf, NULL, NULL);
+ 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;
}
int i;
gboolean mrgctx;
MonoJumpInfo *ji = NULL;
- GSList *unwind_ops = NULL;
+ GSList *unwind_ops;
mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot);
index = MONO_RGCTX_SLOT_INDEX (slot);
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);
- }
+ 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;
}
-gpointer
-mono_arch_create_generic_class_init_trampoline (MonoTrampInfo **info, gboolean aot)
-{
- guint8 *tramp;
- guint8 *code, *buf;
- static int byte_offset = -1;
- static guint8 bitmask;
- guint8 *jump;
- int tramp_size;
- GSList *unwind_ops = NULL;
- MonoJumpInfo *ji = NULL;
-
- tramp_size = 64;
-
- code = buf = mono_global_codeman_reserve (tramp_size);
-
- if (byte_offset < 0)
- mono_marshal_find_bitfield_offset (MonoVTable, initialized, &byte_offset, &bitmask);
-
- amd64_test_membase_imm_size (code, MONO_AMD64_ARG_REG1, byte_offset, bitmask, 1);
- jump = code;
- amd64_branch8 (code, X86_CC_Z, -1, 1);
-
- amd64_ret (code);
-
- x86_patch (jump, code);
-
- if (aot) {
- code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_JIT_ICALL_ADDR, "specific_trampoline_generic_class_init");
- amd64_jump_reg (code, AMD64_R11);
- } else {
- tramp = mono_arch_create_specific_trampoline (NULL, MONO_TRAMPOLINE_GENERIC_CLASS_INIT, mono_get_root_domain (), NULL);
-
- /* jump to the actual trampoline */
- amd64_jump_code (code, tramp);
- }
-
- nacl_global_codeman_validate (&buf, tramp_size, &code);
-
- mono_arch_flush_icache (buf, code - buf);
- mono_profiler_code_buffer_new (buf, code - buf, MONO_PROFILER_CODE_BUFFER_HELPER, NULL);
-
- g_assert (code - buf <= tramp_size);
-
- if (info)
- *info = mono_tramp_info_create ("generic_class_init_trampoline", buf, code - buf, ji, unwind_ops);
-
- return buf;
-}
-
-#ifdef MONO_ARCH_MONITOR_OBJECT_REG
-
-gpointer
-mono_arch_create_monitor_enter_trampoline (MonoTrampInfo **info, gboolean is_v4, gboolean aot)
-{
- guint8 *tramp;
- guint8 *code, *buf;
- guint8 *jump_obj_null, *jump_sync_null, *jump_cmpxchg_failed, *jump_other_owner, *jump_tid, *jump_sync_thin_hash = NULL;
- guint8 *jump_lock_taken_true = NULL;
- int tramp_size;
- int status_offset, nest_offset;
- MonoJumpInfo *ji = NULL;
- GSList *unwind_ops = NULL;
- int obj_reg = MONO_AMD64_ARG_REG1;
- int lock_taken_reg = MONO_AMD64_ARG_REG2;
- int sync_reg = MONO_AMD64_ARG_REG3;
- int tid_reg = MONO_AMD64_ARG_REG4;
- int status_reg = AMD64_RAX;
-
- g_assert (MONO_ARCH_MONITOR_OBJECT_REG == obj_reg);
-#ifdef MONO_ARCH_MONITOR_LOCK_TAKEN_REG
- g_assert (MONO_ARCH_MONITOR_LOCK_TAKEN_REG == lock_taken_reg);
-#else
- g_assert (!is_v4);
-#endif
-
- mono_monitor_threads_sync_members_offset (&status_offset, &nest_offset);
- g_assert (MONO_THREADS_SYNC_MEMBER_SIZE (status_offset) == sizeof (guint32));
- g_assert (MONO_THREADS_SYNC_MEMBER_SIZE (nest_offset) == sizeof (guint32));
- status_offset = MONO_THREADS_SYNC_MEMBER_OFFSET (status_offset);
- nest_offset = MONO_THREADS_SYNC_MEMBER_OFFSET (nest_offset);
-
- tramp_size = 96;
-
- code = buf = mono_global_codeman_reserve (tramp_size);
-
- unwind_ops = mono_arch_get_cie_program ();
-
- if (!aot && mono_thread_get_tls_offset () != -1) {
- /* MonoObject* obj is in obj_reg */
- /* is obj null? */
- amd64_test_reg_reg (code, obj_reg, obj_reg);
- /* if yes, jump to actual trampoline */
- jump_obj_null = code;
- amd64_branch8 (code, X86_CC_Z, -1, 1);
-
- if (is_v4) {
- amd64_test_membase_imm (code, lock_taken_reg, 0, 1);
- /* if *lock_taken is 1, jump to actual trampoline */
- jump_lock_taken_true = code;
- x86_branch8 (code, X86_CC_NZ, -1, 1);
- }
-
- /* load obj->synchronization to sync_reg */
- amd64_mov_reg_membase (code, sync_reg, obj_reg, MONO_STRUCT_OFFSET (MonoObject, synchronisation), 8);
-
- if (mono_gc_is_moving ()) {
- /*if bit zero is set it's a thin hash*/
- /*FIXME use testb encoding*/
- amd64_test_reg_imm (code, sync_reg, 0x01);
- jump_sync_thin_hash = code;
- amd64_branch8 (code, X86_CC_NE, -1, 1);
-
- /*clear bits used by the gc*/
- amd64_alu_reg_imm (code, X86_AND, sync_reg, ~0x3);
- }
-
- /* is synchronization null? */
- amd64_test_reg_reg (code, sync_reg, sync_reg);
- /* if yes, jump to actual trampoline */
- jump_sync_null = code;
- amd64_branch8 (code, X86_CC_Z, -1, 1);
-
- /* load MonoInternalThread* into tid_reg */
- code = mono_amd64_emit_tls_get (code, tid_reg, mono_thread_get_tls_offset ());
- /* load TID into tid_reg */
- amd64_mov_reg_membase (code, tid_reg, tid_reg, MONO_STRUCT_OFFSET (MonoInternalThread, small_id), 4);
-
- /* is synchronization->owner free */
- amd64_mov_reg_membase (code, status_reg, sync_reg, status_offset, 4);
- amd64_test_reg_imm_size (code, status_reg, OWNER_MASK, 4);
- /* if not, jump to next case */
- jump_tid = code;
- amd64_branch8 (code, X86_CC_NZ, -1, 1);
-
- /* if yes, try a compare-exchange with the TID */
- g_assert (tid_reg != X86_EAX);
- /* Form new status in tid_reg */
- amd64_alu_reg_reg_size (code, X86_OR, tid_reg, status_reg, 4);
- /* compare and exchange */
- amd64_prefix (code, X86_LOCK_PREFIX);
- amd64_cmpxchg_membase_reg_size (code, sync_reg, status_offset, tid_reg, 4);
- /* if not successful, jump to actual trampoline */
- jump_cmpxchg_failed = code;
- amd64_branch8 (code, X86_CC_NZ, -1, 1);
- /* if successful, return */
- if (is_v4)
- amd64_mov_membase_imm (code, lock_taken_reg, 0, 1, 1);
- amd64_ret (code);
-
- /* next case: synchronization->owner is not null */
- x86_patch (jump_tid, code);
- /* is synchronization->owner == TID? */
- amd64_alu_reg_imm_size (code, X86_AND, status_reg, OWNER_MASK, 4);
- amd64_alu_reg_reg_size (code, X86_CMP, status_reg, tid_reg, 4);
- /* if not, jump to actual trampoline */
- jump_other_owner = code;
- amd64_branch8 (code, X86_CC_NZ, -1, 1);
- /* if yes, increment nest */
- amd64_inc_membase_size (code, sync_reg, nest_offset, 4);
- /* return */
- if (is_v4)
- amd64_mov_membase_imm (code, lock_taken_reg, 0, 1, 1);
- amd64_ret (code);
-
- 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_cmpxchg_failed, code);
- x86_patch (jump_other_owner, code);
- if (is_v4)
- x86_patch (jump_lock_taken_true, code);
- }
-
- /* jump to the actual trampoline */
- if (MONO_AMD64_ARG_REG1 != obj_reg)
- amd64_mov_reg_reg (code, MONO_AMD64_ARG_REG1, obj_reg, sizeof (mgreg_t));
-
- if (aot) {
- if (is_v4)
- code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_JIT_ICALL_ADDR, "specific_trampoline_monitor_enter_v4");
- else
- code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_JIT_ICALL_ADDR, "specific_trampoline_monitor_enter");
- amd64_jump_reg (code, AMD64_R11);
- } else {
- if (is_v4)
- tramp = mono_arch_create_specific_trampoline (NULL, MONO_TRAMPOLINE_MONITOR_ENTER_V4, mono_get_root_domain (), NULL);
- else
- tramp = mono_arch_create_specific_trampoline (NULL, MONO_TRAMPOLINE_MONITOR_ENTER, mono_get_root_domain (), NULL);
-
- /* jump to the actual trampoline */
- amd64_jump_code (code, tramp);
- }
-
- nacl_global_codeman_validate (&buf, tramp_size, &code);
-
- mono_arch_flush_icache (code, code - buf);
- mono_profiler_code_buffer_new (buf, code - buf, MONO_PROFILER_CODE_BUFFER_MONITOR, NULL);
- g_assert (code - buf <= tramp_size);
-
- if (info) {
- if (is_v4)
- *info = mono_tramp_info_create ("monitor_enter_v4_trampoline", buf, code - buf, ji, unwind_ops);
- else
- *info = mono_tramp_info_create ("monitor_enter_trampoline", buf, code - buf, ji, unwind_ops);
- }
-
- return buf;
-}
-
-gpointer
-mono_arch_create_monitor_exit_trampoline (MonoTrampInfo **info, gboolean aot)
-{
- guint8 *tramp;
- guint8 *code, *buf;
- guint8 *jump_obj_null, *jump_have_waiters, *jump_sync_null, *jump_not_owned, *jump_cmpxchg_failed, *jump_sync_thin_hash = NULL;
- guint8 *jump_next;
- int tramp_size;
- int status_offset, nest_offset;
- MonoJumpInfo *ji = NULL;
- GSList *unwind_ops = NULL;
- int obj_reg = MONO_AMD64_ARG_REG1;
- int sync_reg = MONO_AMD64_ARG_REG2;
- int status_reg = MONO_AMD64_ARG_REG3;
-
- g_assert (obj_reg == MONO_ARCH_MONITOR_OBJECT_REG);
-
- mono_monitor_threads_sync_members_offset (&status_offset, &nest_offset);
- g_assert (MONO_THREADS_SYNC_MEMBER_SIZE (status_offset) == sizeof (guint32));
- g_assert (MONO_THREADS_SYNC_MEMBER_SIZE (nest_offset) == sizeof (guint32));
- status_offset = MONO_THREADS_SYNC_MEMBER_OFFSET (status_offset);
- nest_offset = MONO_THREADS_SYNC_MEMBER_OFFSET (nest_offset);
-
- tramp_size = 112;
-
- code = buf = mono_global_codeman_reserve (tramp_size);
-
- unwind_ops = mono_arch_get_cie_program ();
-
- if (!aot && mono_thread_get_tls_offset () != -1) {
- /* MonoObject* obj is in obj_reg */
- /* is obj null? */
- amd64_test_reg_reg (code, obj_reg, obj_reg);
- /* if yes, jump to actual trampoline */
- jump_obj_null = code;
- amd64_branch8 (code, X86_CC_Z, -1, 1);
-
- /* load obj->synchronization to RCX */
- amd64_mov_reg_membase (code, sync_reg, obj_reg, MONO_STRUCT_OFFSET (MonoObject, synchronisation), 8);
-
- if (mono_gc_is_moving ()) {
- /*if bit zero is set it's a thin hash*/
- /*FIXME use testb encoding*/
- amd64_test_reg_imm (code, sync_reg, 0x01);
- jump_sync_thin_hash = code;
- amd64_branch8 (code, X86_CC_NE, -1, 1);
-
- /*clear bits used by the gc*/
- amd64_alu_reg_imm (code, X86_AND, sync_reg, ~0x3);
- }
-
- /* is synchronization null? */
- amd64_test_reg_reg (code, sync_reg, sync_reg);
- /* if yes, jump to actual trampoline */
- jump_sync_null = code;
- amd64_branch8 (code, X86_CC_Z, -1, 1);
-
- /* next case: synchronization is not null */
- /* load MonoInternalThread* into RAX */
- code = mono_amd64_emit_tls_get (code, AMD64_RAX, mono_thread_get_tls_offset ());
- /* load TID into RAX */
- amd64_mov_reg_membase (code, AMD64_RAX, AMD64_RAX, MONO_STRUCT_OFFSET (MonoInternalThread, small_id), 4);
- /* is synchronization->owner == TID */
- amd64_mov_reg_membase (code, status_reg, sync_reg, status_offset, 4);
- amd64_alu_reg_reg_size (code, X86_XOR, AMD64_RAX, status_reg, 4);
- amd64_test_reg_imm_size (code, AMD64_RAX, OWNER_MASK, 4);
-
- /* if no, jump to actual trampoline */
- jump_not_owned = code;
- amd64_branch8 (code, X86_CC_NZ, -1, 1);
-
- /* next case: synchronization->owner == TID */
- /* is synchronization->nest == 1 */
- amd64_alu_membase_imm_size (code, X86_CMP, sync_reg, nest_offset, 1, 4);
- /* if not, jump to next case */
- jump_next = code;
- amd64_branch8 (code, X86_CC_NZ, -1, 1);
- /* if yes, is synchronization->entry_count greater than zero */
- amd64_test_reg_imm_size (code, status_reg, ENTRY_COUNT_WAITERS, 4);
- /* if not, jump to actual trampoline */
- jump_have_waiters = code;
- amd64_branch8 (code, X86_CC_NZ, -1 , 1);
- /* if yes, try to set synchronization->owner to null and return */
- g_assert (status_reg != AMD64_RAX);
- /* old status in RAX */
- amd64_mov_reg_reg (code, AMD64_RAX, status_reg, 4);
- /* form new status */
- amd64_alu_reg_imm_size (code, X86_AND, status_reg, ENTRY_COUNT_MASK, 4);
- /* compare and exchange */
- amd64_prefix (code, X86_LOCK_PREFIX);
- amd64_cmpxchg_membase_reg_size (code, sync_reg, status_offset, status_reg, 4);
- /* if not successful, jump to actual trampoline */
- jump_cmpxchg_failed = code;
- amd64_branch8 (code, X86_CC_NZ, -1, 1);
- amd64_ret (code);
-
- /* next case: synchronization->nest is not 1 */
- x86_patch (jump_next, code);
- /* decrease synchronization->nest and return */
- amd64_dec_membase_size (code, sync_reg, nest_offset, 4);
- amd64_ret (code);
-
- x86_patch (jump_obj_null, code);
- x86_patch (jump_have_waiters, code);
- x86_patch (jump_not_owned, code);
- x86_patch (jump_cmpxchg_failed, code);
- x86_patch (jump_sync_null, code);
- }
-
- /* jump to the actual trampoline */
- if (MONO_AMD64_ARG_REG1 != obj_reg)
- amd64_mov_reg_reg (code, MONO_AMD64_ARG_REG1, obj_reg, sizeof (mgreg_t));
-
- if (aot) {
- code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_JIT_ICALL_ADDR, "specific_trampoline_monitor_exit");
- amd64_jump_reg (code, AMD64_R11);
- } else {
- tramp = mono_arch_create_specific_trampoline (NULL, MONO_TRAMPOLINE_MONITOR_EXIT, mono_get_root_domain (), NULL);
- amd64_jump_code (code, tramp);
- }
-
- nacl_global_codeman_validate (&buf, tramp_size, &code);
-
- mono_arch_flush_icache (code, code - buf);
- mono_profiler_code_buffer_new (buf, code - buf, MONO_PROFILER_CODE_BUFFER_MONITOR, NULL);
- g_assert (code - buf <= tramp_size);
-
- if (info)
- *info = mono_tramp_info_create ("monitor_exit_trampoline", buf, code - buf, ji, unwind_ops);
-
- return buf;
-}
-
-#else
-
-gpointer
-mono_arch_create_monitor_enter_trampoline (MonoTrampInfo **info, gboolean is_v4, gboolean aot)
-{
- g_assert_not_reached ();
- return NULL;
-}
-
-gpointer
-mono_arch_create_monitor_exit_trampoline (MonoTrampInfo **info, gboolean aot)
-{
- g_assert_not_reached ();
- return NULL;
-}
-
-#endif
-
void
mono_arch_invalidate_method (MonoJitInfo *ji, void *func, gpointer func_arg)
{
guint8 *code, *buf;
int tramp_size = 64;
MonoJumpInfo *ji = NULL;
- GSList *unwind_ops = NULL;
+ GSList *unwind_ops;
g_assert (!aot);
code = buf = mono_global_codeman_reserve (tramp_size);
+ unwind_ops = mono_arch_get_cie_program ();
+
/*
This trampoline restore the call chain of the handler block then jumps into the code that deals with it.
*/
amd64_mov_reg_membase (code, MONO_AMD64_ARG_REG1, MONO_AMD64_ARG_REG1, MONO_STRUCT_OFFSET (MonoJitTlsData, handler_block_return_address), 8);
/* Simulate a call */
amd64_push_reg (code, AMD64_RAX);
+ mono_add_unwind_op_def_cfa_offset (unwind_ops, code, buf, 16);
amd64_jump_code (code, tramp);
} else {
/*Slow path uses a c helper*/
amd64_mov_reg_reg (code, MONO_AMD64_ARG_REG1, AMD64_RSP, 8);
amd64_mov_reg_imm (code, AMD64_RAX, tramp);
amd64_push_reg (code, AMD64_RAX);
+ mono_add_unwind_op_def_cfa_offset (unwind_ops, code, buf, 16);
amd64_push_reg (code, AMD64_RAX);
+ mono_add_unwind_op_def_cfa_offset (unwind_ops, code, buf, 24);
amd64_jump_code (code, handler_block_trampoline_helper);
}
mono_profiler_code_buffer_new (buf, code - buf, MONO_PROFILER_CODE_BUFFER_HELPER, NULL);
g_assert (code - buf <= tramp_size);
- if (info)
- *info = mono_tramp_info_create ("handler_block_trampoline", buf, code - buf, ji, unwind_ops);
+ *info = mono_tramp_info_create ("handler_block_trampoline", buf, code - buf, ji, unwind_ops);
return buf;
}
return *(guint32*)(plt_entry + 6);
#endif
}
+
+/*
+ * mono_arch_create_sdb_trampoline:
+ *
+ * Return a trampoline which captures the current context, passes it to
+ * debugger_agent_single_step_from_context ()/debugger_agent_breakpoint_from_context (),
+ * then restores the (potentially changed) context.
+ */
+guint8*
+mono_arch_create_sdb_trampoline (gboolean single_step, MonoTrampInfo **info, gboolean aot)
+{
+ int tramp_size = 256;
+ int i, framesize, ctx_offset, cfa_offset, gregs_offset;
+ guint8 *code, *buf;
+ GSList *unwind_ops = NULL;
+ MonoJumpInfo *ji = NULL;
+
+ code = buf = mono_global_codeman_reserve (tramp_size);
+
+ framesize = 0;
+#ifdef TARGET_WIN32
+ /* Reserve space where the callee can save the argument registers */
+ framesize += 4 * sizeof (mgreg_t);
+#endif
+
+ ctx_offset = framesize;
+ framesize += sizeof (MonoContext);
+
+ framesize = ALIGN_TO (framesize, MONO_ARCH_FRAME_ALIGNMENT);
+
+ // CFA = sp + 8
+ cfa_offset = 8;
+ mono_add_unwind_op_def_cfa (unwind_ops, code, buf, AMD64_RSP, 8);
+ // IP saved at CFA - 8
+ mono_add_unwind_op_offset (unwind_ops, code, buf, AMD64_RIP, -cfa_offset);
+
+ amd64_push_reg (code, AMD64_RBP);
+ cfa_offset += sizeof(mgreg_t);
+ mono_add_unwind_op_def_cfa_offset (unwind_ops, code, buf, cfa_offset);
+ mono_add_unwind_op_offset (unwind_ops, code, buf, AMD64_RBP, - cfa_offset);
+
+ amd64_mov_reg_reg (code, AMD64_RBP, AMD64_RSP, sizeof(mgreg_t));
+ mono_add_unwind_op_def_cfa_reg (unwind_ops, code, buf, AMD64_RBP);
+ amd64_alu_reg_imm (code, X86_SUB, AMD64_RSP, framesize);
+
+ gregs_offset = ctx_offset + MONO_STRUCT_OFFSET (MonoContext, gregs);
+
+ /* Initialize a MonoContext structure on the stack */
+ for (i = 0; i < AMD64_NREG; ++i) {
+ if (i != AMD64_RIP && i != AMD64_RSP && i != AMD64_RBP)
+ amd64_mov_membase_reg (code, AMD64_RSP, gregs_offset + (i * sizeof (mgreg_t)), i, sizeof (mgreg_t));
+ }
+ amd64_mov_reg_membase (code, AMD64_R11, AMD64_RBP, 0, sizeof (mgreg_t));
+ amd64_mov_membase_reg (code, AMD64_RSP, gregs_offset + (AMD64_RBP * sizeof (mgreg_t)), AMD64_R11, sizeof (mgreg_t));
+ amd64_lea_membase (code, AMD64_R11, AMD64_RBP, 2 * sizeof (mgreg_t));
+ amd64_mov_membase_reg (code, AMD64_RSP, gregs_offset + (AMD64_RSP * sizeof (mgreg_t)), AMD64_R11, sizeof (mgreg_t));
+ amd64_mov_reg_membase (code, AMD64_R11, AMD64_RBP, sizeof (mgreg_t), sizeof (mgreg_t));
+ amd64_mov_membase_reg (code, AMD64_RSP, gregs_offset + (AMD64_RIP * sizeof (mgreg_t)), AMD64_R11, sizeof (mgreg_t));
+
+ /* Call the single step/breakpoint function in sdb */
+ amd64_lea_membase (code, AMD64_ARG_REG1, AMD64_RSP, ctx_offset);
+
+ if (aot) {
+ if (single_step)
+ code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_JIT_ICALL_ADDR, "debugger_agent_single_step_from_context");
+ else
+ code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_JIT_ICALL_ADDR, "debugger_agent_breakpoint_from_context");
+ amd64_call_reg (code, AMD64_R11);
+ } else {
+ if (single_step)
+ amd64_call_code (code, debugger_agent_single_step_from_context);
+ else
+ amd64_call_code (code, debugger_agent_breakpoint_from_context);
+ }
+
+ /* Restore registers from ctx */
+ for (i = 0; i < AMD64_NREG; ++i) {
+ if (i != AMD64_RIP && i != AMD64_RSP && i != AMD64_RBP)
+ amd64_mov_reg_membase (code, AMD64_RSP, i, gregs_offset + (i * sizeof (mgreg_t)), sizeof (mgreg_t));
+ }
+ amd64_mov_reg_membase (code, AMD64_R11, AMD64_RSP, gregs_offset + (AMD64_RBP * sizeof (mgreg_t)), sizeof (mgreg_t));
+ amd64_mov_membase_reg (code, AMD64_RBP, 0, AMD64_R11, sizeof (mgreg_t));
+ amd64_mov_reg_membase (code, AMD64_R11, AMD64_RSP, gregs_offset + (AMD64_RIP * sizeof (mgreg_t)), sizeof (mgreg_t));
+ amd64_mov_membase_reg (code, AMD64_RBP, sizeof (mgreg_t), AMD64_R11, sizeof (mgreg_t));
+
+ amd64_leave (code);
+ cfa_offset -= sizeof (mgreg_t);
+ mono_add_unwind_op_def_cfa (unwind_ops, code, buf, AMD64_RSP, cfa_offset);
+ amd64_ret (code);
+
+ mono_arch_flush_icache (code, code - buf);
+ g_assert (code - buf <= tramp_size);
+
+ const char *tramp_name = single_step ? "sdb_single_step_trampoline" : "sdb_breakpoint_trampoline";
+ *info = mono_tramp_info_create (tramp_name, buf, code - buf, ji, unwind_ops);
+
+ return buf;
+}
projects / mono.git / blobdiff