#include <mono/metadata/tabledefs.h>
#include <mono/metadata/mono-debug.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/metadata/gc-internals.h>
#include <mono/arch/x86/x86-codegen.h>
#include <mono/utils/memcheck.h>
#include "mini.h"
#include "mini-x86.h"
+#include "debugger-agent.h"
+#include "jit-icalls.h"
#define ALIGN_TO(val,align) ((((guint64)val) + ((align) - 1)) & ~((align) - 1))
return start;
}
-gpointer
-mono_arch_get_llvm_imt_trampoline (MonoDomain *domain, MonoMethod *m, int vt_offset)
-{
- guint8 *code, *start;
- int buf_len;
- int this_offset;
-
- buf_len = 32;
-
- start = code = mono_domain_code_reserve (domain, buf_len);
-
- this_offset = mono_x86_get_this_arg_offset (mono_method_signature (m));
-
- /* Set imt arg */
- x86_mov_reg_imm (code, MONO_ARCH_IMT_REG, m);
- /* Load this */
- x86_mov_reg_membase (code, X86_EAX, X86_ESP, this_offset + 4, 4);
- /* Load vtable address */
- x86_mov_reg_membase (code, X86_EAX, X86_EAX, 0, 4);
- x86_jump_membase (code, X86_EAX, vt_offset);
-
- g_assert ((code - start) < buf_len);
-
- nacl_domain_code_validate (domain, &start, buf_len, &code);
-
- mono_arch_flush_icache (start, code - start);
- mono_profiler_code_buffer_new (start, code - start, MONO_PROFILER_CODE_BUFFER_IMT_TRAMPOLINE, NULL);
-
- return start;
-}
-
void
mono_arch_patch_callsite (guint8 *method_start, guint8 *orig_code, guint8 *addr)
{
mono_arch_create_generic_trampoline (MonoTrampolineType tramp_type, MonoTrampInfo **info, gboolean aot)
{
char *tramp_name;
- guint8 *buf, *code, *tramp;
+ guint8 *buf, *code, *tramp, *br_ex_check;
GSList *unwind_ops = NULL;
MonoJumpInfo *ji = NULL;
int i, offset, frame_size, regarray_offset, lmf_offset, caller_ip_offset, arg_offset;
*/
x86_mov_membase_reg (code, X86_EBP, arg_offset, X86_EAX, 4);
+ /* Restore LMF */
+ x86_mov_reg_membase (code, X86_EAX, X86_EBP, lmf_offset + G_STRUCT_OFFSET (MonoLMF, lmf_addr), sizeof (mgreg_t));
+ x86_mov_reg_membase (code, X86_ECX, X86_EBP, lmf_offset + G_STRUCT_OFFSET (MonoLMF, previous_lmf), sizeof (mgreg_t));
+ x86_alu_reg_imm (code, X86_SUB, X86_ECX, 1);
+ x86_mov_membase_reg (code, X86_EAX, 0, X86_ECX, sizeof (mgreg_t));
+
/* Check for interruptions */
if (aot) {
- code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_JIT_ICALL_ADDR, "mono_thread_force_interruption_checkpoint");
+ code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_JIT_ICALL_ADDR, "mono_thread_force_interruption_checkpoint_noraise");
x86_call_reg (code, X86_EAX);
} else {
- x86_call_code (code, (guint8*)mono_thread_force_interruption_checkpoint);
+ x86_call_code (code, (guint8*)mono_thread_force_interruption_checkpoint_noraise);
}
- /* Restore LMF */
- x86_mov_reg_membase (code, X86_EAX, X86_EBP, lmf_offset + G_STRUCT_OFFSET (MonoLMF, lmf_addr), sizeof (mgreg_t));
- x86_mov_reg_membase (code, X86_ECX, X86_EBP, lmf_offset + G_STRUCT_OFFSET (MonoLMF, previous_lmf), sizeof (mgreg_t));
- x86_alu_reg_imm (code, X86_SUB, X86_ECX, 1);
- x86_mov_membase_reg (code, X86_EAX, 0, X86_ECX, sizeof (mgreg_t));
+ x86_test_reg_reg (code, X86_EAX, X86_EAX);
+ br_ex_check = code;
+ x86_branch8 (code, X86_CC_Z, -1, 1);
+
+ /*
+ * Exception case:
+ * We have an exception we want to throw in the caller's frame, so pop
+ * the trampoline frame and throw from the caller.
+ */
+ x86_leave (code);
+ /*
+ * The exception is in eax.
+ * We are calling the throw trampoline used by OP_THROW, so we have to setup the
+ * stack to look the same.
+ * The stack contains the ret addr, and the trampoline argument, the throw trampoline
+ * expects it to contain the ret addr and the exception. It also needs to be aligned
+ * after the exception is pushed.
+ */
+ /* Align stack */
+ x86_push_reg (code, X86_EAX);
+ /* Push the exception */
+ x86_push_reg (code, X86_EAX);
+ //x86_breakpoint (code);
+ /* Push the original return value */
+ x86_push_membase (code, X86_ESP, 3 * 4);
+ /*
+ * EH is initialized after trampolines, so get the address of the variable
+ * which contains throw_exception, and load it from there.
+ */
+ if (aot) {
+ /* Not really a jit icall */
+ code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_JIT_ICALL_ADDR, "throw_exception_addr");
+ } else {
+ x86_mov_reg_imm (code, X86_ECX, (guint8*)mono_get_throw_exception_addr ());
+ }
+ x86_mov_reg_membase (code, X86_ECX, X86_ECX, 0, sizeof(gpointer));
+ x86_jump_reg (code, X86_ECX);
+
+ /* Normal case */
+ mono_x86_patch (br_ex_check, code);
/* Restore registers */
for (i = X86_EAX; i <= X86_EDI; ++i) {
return buf;
}
-#ifdef MONO_ARCH_MONITOR_OBJECT_REG
-/*
- * The code produced by this trampoline is equivalent to this:
- *
- * if (obj) {
- * if (obj->synchronisation) {
- * if (obj->synchronisation->owner == 0) {
- * if (cmpxch (&obj->synchronisation->owner, TID, 0) == 0)
- * return;
- * }
- * if (obj->synchronisation->owner == TID) {
- * ++obj->synchronisation->nest;
- * return;
- * }
- * }
- * }
- * return full_monitor_enter ();
- *
- */
-gpointer
-mono_arch_create_monitor_enter_trampoline (MonoTrampInfo **info, gboolean is_v4, gboolean aot)
-{
- guint8 *code, *buf;
- guint8 *jump_obj_null, *jump_sync_null, *jump_other_owner, *jump_cmpxchg_failed, *jump_tid, *jump_sync_thin_hash = NULL;
- guint8 *jump_lock_taken_true = NULL;
- int tramp_size;
- int status_offset, nest_offset;
- MonoJumpInfo *ji = NULL;
- int cfa_offset;
- GSList *unwind_ops = NULL;
-
- g_assert (MONO_ARCH_MONITOR_OBJECT_REG == X86_EAX);
-#ifdef MONO_ARCH_MONITOR_LOCK_TAKEN_REG
- g_assert (MONO_ARCH_MONITOR_LOCK_TAKEN_REG == X86_EDX);
-#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 = NACL_SIZE (128, 192);
-
- code = buf = mono_global_codeman_reserve (tramp_size);
-
- cfa_offset = 4;
- unwind_ops = mono_arch_get_cie_program ();
-
- x86_push_reg (code, X86_EAX);
- cfa_offset += 4;
- mono_add_unwind_op_def_cfa_offset (unwind_ops, code, buf, cfa_offset);
- /* FIXME Unwind information */
- if (mono_thread_get_tls_offset () != -1) {
- if (is_v4) {
- x86_test_membase_imm (code, X86_EDX, 0, 1);
- /* if *lock_taken is 1, jump to actual trampoline */
- jump_lock_taken_true = code;
- x86_branch8 (code, X86_CC_NZ, -1, 1);
- x86_push_reg (code, X86_EDX);
- }
- /* MonoObject* obj is in EAX */
- /* is obj null? */
- x86_test_reg_reg (code, X86_EAX, X86_EAX);
- /* if yes, jump to actual trampoline */
- jump_obj_null = code;
- x86_branch8 (code, X86_CC_Z, -1, 1);
-
- /* load obj->synchronization to ECX */
- x86_mov_reg_membase (code, X86_ECX, X86_EAX, MONO_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 */
- 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, MONO_STRUCT_OFFSET (MonoInternalThread, small_id), 4);
-
- /* is synchronization->owner free */
- x86_mov_reg_membase (code, X86_EAX, X86_ECX, status_offset, 4);
- x86_test_reg_imm (code, X86_EAX, OWNER_MASK);
- /* if not, jump to next case */
- jump_tid = code;
- x86_branch8 (code, X86_CC_NZ, -1, 1);
-
- /* if yes, try a compare-exchange with the TID */
- /* Form new status */
- x86_alu_reg_reg (code, X86_OR, X86_EDX, X86_EAX);
- /* compare and exchange */
- x86_prefix (code, X86_LOCK_PREFIX);
- x86_cmpxchg_membase_reg (code, X86_ECX, status_offset, X86_EDX);
- /* if not successful, jump to actual trampoline */
- jump_cmpxchg_failed = code;
- x86_branch8 (code, X86_CC_NZ, -1, 1);
- /* if successful, pop and return */
- if (is_v4) {
- x86_pop_reg (code, X86_EDX);
- x86_mov_membase_imm (code, X86_EDX, 0, 1, 1);
- }
- x86_pop_reg (code, X86_EAX);
- x86_ret (code);
-
- /* next case: synchronization->owner is not null */
- x86_patch (jump_tid, code);
- /* is synchronization->owner == TID? */
- x86_alu_reg_imm (code, X86_AND, X86_EAX, OWNER_MASK);
- x86_alu_reg_reg (code, X86_CMP, X86_EAX, X86_EDX);
- /* if not, jump to actual trampoline */
- jump_other_owner = code;
- x86_branch8 (code, X86_CC_NZ, -1, 1);
- /* if yes, increment nest */
- x86_inc_membase (code, X86_ECX, nest_offset);
- if (is_v4) {
- x86_pop_reg (code, X86_EDX);
- x86_mov_membase_imm (code, X86_EDX, 0, 1, 1);
- }
- x86_pop_reg (code, X86_EAX);
- /* return */
- x86_ret (code);
-
- /* obj is pushed, 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_sync_null, code);
- x86_patch (jump_other_owner, code);
- x86_patch (jump_cmpxchg_failed, code);
-
- if (is_v4) {
- x86_pop_reg (code, X86_EDX);
- x86_patch (jump_lock_taken_true, code);
- }
- }
-
- if (aot) {
- /* We are calling the generic trampoline directly, the argument is pushed
- * on the stack just like a specific trampoline.
- */
- if (is_v4)
- code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_JIT_ICALL_ADDR, "generic_trampoline_monitor_enter_v4");
- else
- code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_JIT_ICALL_ADDR, "generic_trampoline_monitor_enter");
- x86_jump_reg (code, X86_EAX);
- } else {
- if (is_v4)
- x86_jump_code (code, mono_get_trampoline_code (MONO_TRAMPOLINE_MONITOR_ENTER_V4));
- else
- x86_jump_code (code, mono_get_trampoline_code (MONO_TRAMPOLINE_MONITOR_ENTER));
- }
-
- mono_arch_flush_icache (buf, code - buf);
- g_assert (code - buf <= tramp_size);
-
- nacl_global_codeman_validate (&buf, tramp_size, &code);
- mono_profiler_code_buffer_new (buf, code - buf, MONO_PROFILER_CODE_BUFFER_MONITOR, NULL);
-
- 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 = mono_get_trampoline_code (MONO_TRAMPOLINE_MONITOR_EXIT);
- guint8 *code, *buf;
- guint8 *jump_obj_null, *jump_have_waiters, *jump_sync_null, *jump_not_owned, *jump_sync_thin_hash = NULL;
- guint8 *jump_next, *jump_cmpxchg_failed;
- int tramp_size;
- int status_offset, nest_offset;
- MonoJumpInfo *ji = NULL;
- GSList *unwind_ops = NULL;
-
- g_assert (MONO_ARCH_MONITOR_OBJECT_REG == X86_EAX);
-
- 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 = NACL_SIZE (128, 192);
-
- code = buf = mono_global_codeman_reserve (tramp_size);
-
- /* FIXME Unwind information */
-
- x86_push_reg (code, X86_EAX);
- if (mono_thread_get_tls_offset () != -1) {
- /* MonoObject* obj is in EAX */
- /* is obj null? */
- x86_test_reg_reg (code, X86_EAX, X86_EAX);
- /* if yes, jump to actual trampoline */
- jump_obj_null = code;
- x86_branch8 (code, X86_CC_Z, -1, 1);
-
- /* load obj->synchronization to ECX */
- x86_mov_reg_membase (code, X86_ECX, X86_EAX, MONO_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);
-
- /* next case: synchronization is not null */
- /* load MonoInternalThread* into EDX */
- 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, MONO_STRUCT_OFFSET (MonoInternalThread, small_id), 4);
- /* is synchronization->owner == TID */
- x86_mov_reg_membase (code, X86_EAX, X86_ECX, status_offset, 4);
- x86_alu_reg_reg (code, X86_XOR, X86_EDX, X86_EAX);
- x86_test_reg_imm (code, X86_EDX, OWNER_MASK);
- /* if no, jump to actual trampoline */
- jump_not_owned = code;
- x86_branch8 (code, X86_CC_NZ, -1, 1);
-
- /* next case: synchronization->owner == TID */
- /* is synchronization->nest == 1 */
- x86_alu_membase_imm (code, X86_CMP, X86_ECX, nest_offset, 1);
- /* if not, jump to next case */
- jump_next = code;
- x86_branch8 (code, X86_CC_NZ, -1, 1);
- /* if yes, is synchronization->entry_count greater than zero? */
- x86_test_reg_imm (code, X86_EAX, ENTRY_COUNT_WAITERS);
- /* if yes, jump to actual trampoline */
- jump_have_waiters = code;
- x86_branch8 (code, X86_CC_NZ, -1 , 1);
- /* if not, try to set synchronization->owner to null and return */
- x86_mov_reg_reg (code, X86_EDX, X86_EAX, 4);
- x86_alu_reg_imm (code, X86_AND, X86_EDX, ENTRY_COUNT_MASK);
- /* compare and exchange */
- x86_prefix (code, X86_LOCK_PREFIX);
- /* EAX contains the previous status */
- x86_cmpxchg_membase_reg (code, X86_ECX, status_offset, X86_EDX);
- /* if not successful, jump to actual trampoline */
- jump_cmpxchg_failed = code;
- x86_branch8 (code, X86_CC_NZ, -1, 1);
-
- x86_pop_reg (code, X86_EAX);
- x86_ret (code);
-
- /* next case: synchronization->nest is not 1 */
- x86_patch (jump_next, code);
- /* decrease synchronization->nest and return */
- x86_dec_membase (code, X86_ECX, nest_offset);
- x86_pop_reg (code, X86_EAX);
- x86_ret (code);
-
- /* 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_cmpxchg_failed, code);
- x86_patch (jump_not_owned, code);
- x86_patch (jump_sync_null, code);
- }
-
- /* obj is pushed, jump to the actual trampoline */
- if (aot) {
- code = mono_arch_emit_load_aotconst (buf, code, &ji, MONO_PATCH_INFO_JIT_ICALL_ADDR, "generic_trampoline_monitor_exit");
- x86_jump_reg (code, X86_EAX);
- } else {
- 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);
- mono_profiler_code_buffer_new (buf, code - buf, MONO_PROFILER_CODE_BUFFER_MONITOR, NULL);
-
- *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)
{
return start;
}
+/*
+ * 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 framesize, ctx_offset, cfa_offset;
+ guint8 *code, *buf;
+ GSList *unwind_ops = NULL;
+ MonoJumpInfo *ji = NULL;
+
+ code = buf = mono_global_codeman_reserve (tramp_size);
+
+ framesize = 0;
+
+ /* Argument area */
+ framesize += sizeof (mgreg_t);
+
+ framesize = ALIGN_TO (framesize, 8);
+ ctx_offset = framesize;
+ framesize += sizeof (MonoContext);
+
+ framesize = ALIGN_TO (framesize, MONO_ARCH_FRAME_ALIGNMENT);
+
+ // CFA = sp + 4
+ cfa_offset = 4;
+ mono_add_unwind_op_def_cfa (unwind_ops, code, buf, X86_ESP, 4);
+ // IP saved at CFA - 4
+ mono_add_unwind_op_offset (unwind_ops, code, buf, X86_NREG, -cfa_offset);
+
+ x86_push_reg (code, X86_EBP);
+ 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, X86_EBP, - cfa_offset);
+
+ x86_mov_reg_reg (code, X86_EBP, X86_ESP, sizeof(mgreg_t));
+ mono_add_unwind_op_def_cfa_reg (unwind_ops, code, buf, X86_EBP);
+ /* The + 8 makes the stack aligned */
+ x86_alu_reg_imm (code, X86_SUB, X86_ESP, framesize + 8);
+
+ /* Initialize a MonoContext structure on the stack */
+ x86_mov_membase_reg (code, X86_ESP, ctx_offset + G_STRUCT_OFFSET (MonoContext, eax), X86_EAX, sizeof (mgreg_t));
+ x86_mov_membase_reg (code, X86_ESP, ctx_offset + G_STRUCT_OFFSET (MonoContext, ebx), X86_EBX, sizeof (mgreg_t));
+ x86_mov_membase_reg (code, X86_ESP, ctx_offset + G_STRUCT_OFFSET (MonoContext, ecx), X86_ECX, sizeof (mgreg_t));
+ x86_mov_membase_reg (code, X86_ESP, ctx_offset + G_STRUCT_OFFSET (MonoContext, edx), X86_EDX, sizeof (mgreg_t));
+ x86_mov_reg_membase (code, X86_EAX, X86_EBP, 0, sizeof (mgreg_t));
+ x86_mov_membase_reg (code, X86_ESP, ctx_offset + G_STRUCT_OFFSET (MonoContext, ebp), X86_EAX, sizeof (mgreg_t));
+ x86_mov_reg_reg (code, X86_EAX, X86_EBP, sizeof (mgreg_t));
+ x86_alu_reg_imm (code, X86_ADD, X86_EAX, cfa_offset);
+ x86_mov_membase_reg (code, X86_ESP, ctx_offset + G_STRUCT_OFFSET (MonoContext, esp), X86_ESP, sizeof (mgreg_t));
+ x86_mov_membase_reg (code, X86_ESP, ctx_offset + G_STRUCT_OFFSET (MonoContext, esi), X86_ESI, sizeof (mgreg_t));
+ x86_mov_membase_reg (code, X86_ESP, ctx_offset + G_STRUCT_OFFSET (MonoContext, edi), X86_EDI, sizeof (mgreg_t));
+ x86_mov_reg_membase (code, X86_EAX, X86_EBP, 4, sizeof (mgreg_t));
+ x86_mov_membase_reg (code, X86_ESP, ctx_offset + G_STRUCT_OFFSET (MonoContext, eip), X86_EAX, sizeof (mgreg_t));
+
+ /* Call the single step/breakpoint function in sdb */
+ x86_lea_membase (code, X86_EAX, X86_ESP, ctx_offset);
+ x86_mov_membase_reg (code, X86_ESP, 0, X86_EAX, sizeof (mgreg_t));
+
+ if (aot) {
+ x86_breakpoint (code);
+ } else {
+ if (single_step)
+ x86_call_code (code, debugger_agent_single_step_from_context);
+ else
+ x86_call_code (code, debugger_agent_breakpoint_from_context);
+ }
+
+ /* Restore registers from ctx */
+ /* Overwrite the saved ebp */
+ x86_mov_reg_membase (code, X86_EAX, X86_ESP, ctx_offset + G_STRUCT_OFFSET (MonoContext, ebp), sizeof (mgreg_t));
+ x86_mov_membase_reg (code, X86_EBP, 0, X86_EAX, sizeof (mgreg_t));
+ /* Overwrite saved eip */
+ x86_mov_reg_membase (code, X86_EAX, X86_ESP, ctx_offset + G_STRUCT_OFFSET (MonoContext, eip), sizeof (mgreg_t));
+ x86_mov_membase_reg (code, X86_EBP, 4, X86_EAX, sizeof (mgreg_t));
+ x86_mov_reg_membase (code, X86_EAX, X86_ESP, ctx_offset + G_STRUCT_OFFSET (MonoContext, eax), sizeof (mgreg_t));
+ x86_mov_reg_membase (code, X86_EBX, X86_ESP, ctx_offset + G_STRUCT_OFFSET (MonoContext, ebx), sizeof (mgreg_t));
+ x86_mov_reg_membase (code, X86_ECX, X86_ESP, ctx_offset + G_STRUCT_OFFSET (MonoContext, ecx), sizeof (mgreg_t));
+ x86_mov_reg_membase (code, X86_EDX, X86_ESP, ctx_offset + G_STRUCT_OFFSET (MonoContext, edx), sizeof (mgreg_t));
+ x86_mov_reg_membase (code, X86_ESI, X86_ESP, ctx_offset + G_STRUCT_OFFSET (MonoContext, esi), sizeof (mgreg_t));
+ x86_mov_reg_membase (code, X86_EDI, X86_ESP, ctx_offset + G_STRUCT_OFFSET (MonoContext, edi), sizeof (mgreg_t));
+
+ x86_leave (code);
+ cfa_offset -= sizeof (mgreg_t);
+ mono_add_unwind_op_def_cfa (unwind_ops, code, buf, X86_ESP, cfa_offset);
+ x86_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;
+}
+
#if defined(ENABLE_GSHAREDVT)
#include "../../../mono-extensions/mono/mini/tramp-x86-gsharedvt.c"
projects / mono.git / blobdiff