gpointer mono_arch_create_rgctx_lazy_fetch_trampoline (guint32 slot, MonoTrampInfo **info, gboolean aot) { #ifdef MONO_ARCH_VTABLE_REG guint8 *tramp; guint8 *code, *buf; guint8 **rgctx_null_jumps; gint32 displace; int tramp_size, depth, index, iPatch = 0, i; gboolean mrgctx; MonoJumpInfo *ji = NULL; GSList *unwind_ops = NULL; mrgctx = MONO_RGCTX_SLOT_IS_MRGCTX (slot); index = MONO_RGCTX_SLOT_INDEX (slot); if (mrgctx) index += MONO_SIZEOF_METHOD_RUNTIME_GENERIC_CONTEXT / sizeof (gpointer); for (depth = 0; ; ++depth) { int size = mono_class_rgctx_get_array_size (depth, mrgctx); if (index < size - 1) break; index -= size - 1; } tramp_size = 48 + 16 * depth; if (mrgctx) tramp_size += 4; else tramp_size += 12; code = buf = mono_global_codeman_reserve (tramp_size); unwind_ops = mono_arch_get_cie_program (); rgctx_null_jumps = g_malloc (sizeof (guint8*) * (depth + 2)); if (mrgctx) { /* get mrgctx ptr */ s390_lgr (code, s390_r1, s390_r2); } else { /* load rgctx ptr from vtable */ s390_lg (code, s390_r1, 0, s390_r2, G_STRUCT_OFFSET(MonoVTable, runtime_generic_context)); /* is the rgctx ptr null? */ s390_ltgr (code, s390_r1, s390_r1); /* if yes, jump to actual trampoline */ rgctx_null_jumps [iPatch++] = code; s390_jge (code, 0); } for (i = 0; i < depth; ++i) { /* load ptr to next array */ if (mrgctx && i == 0) s390_lg (code, s390_r1, 0, s390_r1, MONO_SIZEOF_METHOD_RUNTIME_GENERIC_CONTEXT); else s390_lg (code, s390_r1, 0, s390_r1, 0); s390_ltgr (code, s390_r1, s390_r1); /* if the ptr is null then jump to actual trampoline */ rgctx_null_jumps [iPatch++] = code; s390_jge (code, 0); } /* fetch slot */ s390_lg (code, s390_r1, 0, s390_r1, (sizeof (gpointer) * (index + 1))); /* is the slot null? */ s390_ltgr (code, s390_r1, s390_r1); /* if yes, jump to actual trampoline */ rgctx_null_jumps [iPatch++] = code; s390_jge (code, 0); /* otherwise return r1 */ s390_lgr (code, s390_r2, s390_r1); s390_br (code, s390_r14); for (i = 0; i < iPatch; i++) { displace = ((uintptr_t) code - (uintptr_t) rgctx_null_jumps[i]) / 2; s390_patch_rel ((rgctx_null_jumps [i] + 2), displace); } g_free (rgctx_null_jumps); /* move the rgctx pointer to the VTABLE register */ s390_lgr (code, MONO_ARCH_VTABLE_REG, s390_r2); tramp = mono_arch_create_specific_trampoline (GUINT_TO_POINTER (slot), MONO_TRAMPOLINE_RGCTX_LAZY_FETCH, mono_get_root_domain (), NULL); /* jump to the actual trampoline */ displace = (tramp - code) / 2; s390_jg (code, displace); 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); #else g_assert_not_reached (); #endif return(NULL); }
gpointer mono_arch_create_monitor_enter_trampoline (MonoTrampInfo **info, gboolean is_v4, gboolean aot) { guint8 *tramp, *code, *buf; gint16 *jump_obj_null, *jump_sync_null, *jump_cs_failed, *jump_other_owner, *jump_tid, *jump_sync_thin_hash = NULL, *jump_lock_taken_true = NULL; int tramp_size, status_reg = s390_r0, lock_taken_reg = s390_r1, obj_reg = s390_r2, sync_reg = s390_r3, tid_reg = s390_r4, status_offset, nest_offset; MonoJumpInfo *ji = NULL; GSList *unwind_ops = NULL; 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 = 160; code = buf = mono_global_codeman_reserve (tramp_size); unwind_ops = mono_arch_get_cie_program (); if (mono_thread_get_tls_offset () != -1) { /* MonoObject* obj is in obj_reg */ /* is obj null? */ s390_ltgr (code, obj_reg, obj_reg); /* if yes, jump to actual trampoline */ s390_jz (code, 0); CODEPTR(code, jump_obj_null); if (is_v4) { s390_cli (code, lock_taken_reg, 0, 1); /* if *lock_taken is 1, jump to actual trampoline */ s390_je (code, 0); CODEPTR(code, jump_lock_taken_true); } /* load obj->synchronization to sync_reg */ s390_lg (code, sync_reg, 0, obj_reg, MONO_STRUCT_OFFSET (MonoObject, synchronisation)); if (mono_gc_is_moving ()) { /*if bit zero is set it's a thin hash*/ s390_tmll (code, sync_reg, 1); s390_jo (code, 0); CODEPTR(code, jump_sync_thin_hash); /* Clear bits used by the gc */ s390_nill (code, sync_reg, ~0x3); } /* is synchronization null? */ s390_ltgr (code, sync_reg, sync_reg); /* if yes, jump to actual trampoline */ s390_jz (code, 0); CODEPTR(code, jump_sync_null); /* load MonoInternalThread* into tid_reg */ s390_ear (code, s390_r5, 0); s390_sllg(code, s390_r5, s390_r5, 0, 32); s390_ear (code, s390_r5, 1); /* load tid */ s390_lg (code, tid_reg, 0, s390_r5, mono_thread_get_tls_offset ()); s390_lgf (code, tid_reg, 0, tid_reg, MONO_STRUCT_OFFSET (MonoInternalThread, small_id)); /* is synchronization->owner free */ s390_lgf (code, status_reg, 0, sync_reg, status_offset); s390_nilf (code, status_reg, OWNER_MASK); /* if not, jump to next case */ s390_jnz (code, 0); CODEPTR(code, jump_tid); /* if yes, try a compare-exchange with the TID */ /* Form new status in tid_reg */ s390_xr (code, tid_reg, status_reg); /* compare and exchange */ s390_cs (code, status_reg, tid_reg, sync_reg, status_offset); s390_jnz (code, 0); CODEPTR(code, jump_cs_failed); /* if successful, return */ if (is_v4) s390_mvi (code, lock_taken_reg, 0, 1); s390_br (code, s390_r14); /* next case: synchronization->owner is not null */ PTRSLOT(code, jump_tid); /* is synchronization->owner == TID? */ s390_nilf (code, status_reg, OWNER_MASK); s390_cr (code, status_reg, tid_reg); /* if not, jump to actual trampoline */ s390_jnz (code, 0); CODEPTR(code, jump_other_owner); /* if yes, increment nest */ s390_lgf (code, s390_r5, 0, sync_reg, nest_offset); s390_ahi (code, s390_r5, 1); s390_st (code, s390_r5, 0, sync_reg, nest_offset); /* return */ if (is_v4) s390_mvi (code, lock_taken_reg, 0, 1); s390_br (code, s390_r14); PTRSLOT (code, jump_obj_null); if (jump_sync_thin_hash) PTRSLOT (code, jump_sync_thin_hash); PTRSLOT (code, jump_sync_null); PTRSLOT (code, jump_cs_failed); PTRSLOT (code, jump_other_owner); if (is_v4) PTRSLOT (code, jump_lock_taken_true); } /* jump to the actual trampoline */ 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 */ S390_SET (code, s390_r1, tramp); s390_br (code, s390_r1); 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, *code, *buf; gint16 *jump_obj_null, *jump_have_waiters, *jump_sync_null, *jump_not_owned, *jump_cs_failed, *jump_next, *jump_sync_thin_hash = NULL; int tramp_size, status_offset, nest_offset; MonoJumpInfo *ji = NULL; GSList *unwind_ops = NULL; int obj_reg = s390_r2, sync_reg = s390_r3, status_reg = s390_r4; 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 = 160; code = buf = mono_global_codeman_reserve (tramp_size); unwind_ops = mono_arch_get_cie_program (); if (mono_thread_get_tls_offset () != -1) { /* MonoObject* obj is in obj_reg */ /* is obj null? */ s390_ltgr (code, obj_reg, obj_reg); /* if yes, jump to actual trampoline */ s390_jz (code, 0); CODEPTR(code, jump_obj_null); /* load obj->synchronization to RCX */ s390_lg (code, sync_reg, 0, obj_reg, MONO_STRUCT_OFFSET (MonoObject, synchronisation)); if (mono_gc_is_moving ()) { /*if bit zero is set it's a thin hash*/ s390_tmll (code, sync_reg, 1); s390_jo (code, 0); CODEPTR(code, jump_sync_thin_hash); /* Clear bits used by the gc */ s390_nill (code, sync_reg, ~0x3); } /* is synchronization null? */ s390_ltgr (code, sync_reg, sync_reg); /* if yes, jump to actual trampoline */ s390_jz (code, 0); CODEPTR(code, jump_sync_null); /* next case: synchronization is not null */ /* load MonoInternalThread* into r5 */ s390_ear (code, s390_r5, 0); s390_sllg(code, s390_r5, s390_r5, 0, 32); s390_ear (code, s390_r5, 1); /* load TID into r1 */ s390_lg (code, s390_r1, 0, s390_r5, mono_thread_get_tls_offset ()); s390_lgf (code, s390_r1, 0, s390_r1, MONO_STRUCT_OFFSET (MonoInternalThread, small_id)); /* is synchronization->owner == TID */ s390_lgf (code, status_reg, 0, sync_reg, status_offset); s390_xr (code, s390_r1, status_reg); s390_tmlh (code, s390_r1, OWNER_MASK); /* if not, jump to actual trampoline */ s390_jno (code, 0); CODEPTR(code, jump_not_owned); /* next case: synchronization->owner == TID */ /* is synchronization->nest == 1 */ s390_lgf (code, s390_r0, 0, sync_reg, nest_offset); s390_chi (code, s390_r0, 1); /* if not, jump to next case */ s390_jne (code, 0); CODEPTR(code, jump_next); /* if yes, is synchronization->entry_count greater than zero */ s390_cfi (code, status_reg, ENTRY_COUNT_WAITERS); /* if not, jump to actual trampoline */ s390_jnz (code, 0); CODEPTR(code, jump_have_waiters); /* if yes, try to set synchronization->owner to null and return */ /* old status in s390_r0 */ s390_lgfr (code, s390_r0, status_reg); /* form new status */ s390_nilf (code, status_reg, ENTRY_COUNT_MASK); /* compare and exchange */ s390_cs (code, s390_r0, status_reg, sync_reg, status_offset); /* if not successful, jump to actual trampoline */ s390_jnz (code, 0); CODEPTR(code, jump_cs_failed); s390_br (code, s390_r14); /* next case: synchronization->nest is not 1 */ PTRSLOT (code, jump_next); /* decrease synchronization->nest and return */ s390_lgf (code, s390_r0, 0, sync_reg, nest_offset); s390_ahi (code, s390_r0, -1); s390_st (code, s390_r0, 0, sync_reg, nest_offset); s390_br (code, s390_r14); PTRSLOT (code, jump_obj_null); if (jump_sync_thin_hash) PTRSLOT (code, jump_sync_thin_hash); PTRSLOT (code, jump_have_waiters); PTRSLOT (code, jump_not_owned); PTRSLOT (code, jump_cs_failed); PTRSLOT (code, jump_sync_null); } /* jump to the actual trampoline */ tramp = mono_arch_create_specific_trampoline (NULL, MONO_TRAMPOLINE_MONITOR_EXIT, mono_get_root_domain (), NULL); S390_SET (code, s390_r1, tramp); s390_br (code, s390_r1); 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; }
guchar* mono_arch_create_generic_trampoline (MonoTrampolineType tramp_type, MonoTrampInfo **info, gboolean aot) { char *tramp_name; guint8 *buf, *tramp, *code; int i, offset, has_caller; short *o[1]; GSList *unwind_ops = NULL; MonoJumpInfo *ji = NULL; g_assert (!aot); /* Now we'll create in 'buf' the S/390 trampoline code. This is the trampoline code common to all methods */ code = buf = mono_global_codeman_reserve(512); if (tramp_type == MONO_TRAMPOLINE_JUMP) has_caller = 0; else has_caller = 1; /*----------------------------------------------------------- STEP 0: First create a non-standard function prologue with a stack size big enough to save our registers. -----------------------------------------------------------*/ s390_stmg (buf, s390_r6, s390_r15, STK_BASE, S390_REG_SAVE_OFFSET); s390_lgr (buf, s390_r11, s390_r15); s390_aghi (buf, STK_BASE, -sizeof(trampStack_t)); s390_stg (buf, s390_r11, 0, STK_BASE, 0); /*---------------------------------------------------------------*/ /* we build the MonoLMF structure on the stack - see mini-s390.h */ /* Keep in sync with the code in mono_arch_emit_prolog */ /*---------------------------------------------------------------*/ s390_lgr (buf, LMFReg, STK_BASE); s390_aghi (buf, LMFReg, G_STRUCT_OFFSET(trampStack_t, LMF)); /*---------------------------------------------------------------*/ /* Save general and floating point registers in LMF */ /*---------------------------------------------------------------*/ s390_stmg (buf, s390_r0, s390_r1, LMFReg, G_STRUCT_OFFSET(MonoLMF, gregs[0])); s390_stmg (buf, s390_r2, s390_r5, LMFReg, G_STRUCT_OFFSET(MonoLMF, gregs[2])); s390_mvc (buf, 10*sizeof(gulong), LMFReg, G_STRUCT_OFFSET(MonoLMF, gregs[6]), s390_r11, S390_REG_SAVE_OFFSET); offset = G_STRUCT_OFFSET(MonoLMF, fregs[0]); for (i = s390_f0; i <= s390_f15; ++i) { s390_std (buf, i, 0, LMFReg, offset); offset += sizeof(gdouble); } /*---------------------------------------------------------- STEP 1: call 'mono_get_lmf_addr()' to get the address of our LMF. We'll need to restore it after the call to 's390_magic_trampoline' and before the call to the native method. ----------------------------------------------------------*/ S390_SET (buf, s390_r1, mono_get_lmf_addr); s390_basr (buf, s390_r14, s390_r1); /*---------------------------------------------------------------*/ /* Set lmf.lmf_addr = jit_tls->lmf */ /*---------------------------------------------------------------*/ s390_stg (buf, s390_r2, 0, LMFReg, G_STRUCT_OFFSET(MonoLMF, lmf_addr)); /*---------------------------------------------------------------*/ /* Get current lmf */ /*---------------------------------------------------------------*/ s390_lg (buf, s390_r0, 0, s390_r2, 0); /*---------------------------------------------------------------*/ /* Set our lmf as the current lmf */ /*---------------------------------------------------------------*/ s390_stg (buf, LMFReg, 0, s390_r2, 0); /*---------------------------------------------------------------*/ /* Have our lmf.previous_lmf point to the last lmf */ /*---------------------------------------------------------------*/ s390_stg (buf, s390_r0, 0, LMFReg, G_STRUCT_OFFSET(MonoLMF, previous_lmf)); /*---------------------------------------------------------------*/ /* save method info */ /*---------------------------------------------------------------*/ s390_lg (buf, s390_r1, 0, LMFReg, G_STRUCT_OFFSET(MonoLMF, gregs[1])); s390_stg (buf, s390_r1, 0, LMFReg, G_STRUCT_OFFSET(MonoLMF, method)); /*---------------------------------------------------------------*/ /* save the current SP */ /*---------------------------------------------------------------*/ s390_lg (buf, s390_r1, 0, STK_BASE, 0); s390_stg (buf, s390_r1, 0, LMFReg, G_STRUCT_OFFSET(MonoLMF, ebp)); /*---------------------------------------------------------------*/ /* save the current IP */ /*---------------------------------------------------------------*/ if (has_caller) { s390_lg (buf, s390_r1, 0, s390_r1, S390_RET_ADDR_OFFSET); } else { s390_lghi (buf, s390_r1, 0); } s390_stg (buf, s390_r1, 0, LMFReg, G_STRUCT_OFFSET(MonoLMF, eip)); /*---------------------------------------------------------------*/ /* STEP 2: call the C trampoline function */ /*---------------------------------------------------------------*/ /* Set arguments */ /* Arg 1: host_mgreg_t *regs */ s390_la (buf, s390_r2, 0, LMFReg, G_STRUCT_OFFSET(MonoLMF, gregs[0])); /* Arg 2: code (next address to the instruction that called us) */ if (has_caller) { s390_lg (buf, s390_r3, 0, s390_r11, S390_RET_ADDR_OFFSET); } else { s390_lghi (buf, s390_r3, 0); } /* Arg 3: Trampoline argument */ s390_lg (buf, s390_r4, 0, LMFReg, G_STRUCT_OFFSET(MonoLMF, gregs[1])); /* Arg 4: trampoline address. */ S390_SET (buf, s390_r5, buf); /* Calculate call address and call the C trampoline. Return value will be in r2 */ tramp = (guint8*)mono_get_trampoline_func (tramp_type); S390_SET (buf, s390_r1, tramp); s390_basr (buf, s390_r14, s390_r1); /* OK, code address is now on r2. Save it, so that we can restore r2 and use it later */ s390_stg (buf, s390_r2, 0, STK_BASE, G_STRUCT_OFFSET(trampStack_t, saveFn)); /*---------------------------------------------------------- STEP 3: Restore the LMF ----------------------------------------------------------*/ restoreLMF(buf, STK_BASE, sizeof(trampStack_t)); /* Check for thread interruption */ S390_SET (buf, s390_r1, (guint8 *)mono_thread_force_interruption_checkpoint_noraise); s390_basr (buf, s390_r14, s390_r1); s390_ltgr (buf, s390_r2, s390_r2); s390_jz (buf, 0); CODEPTR (buf, o[0]); /* * 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. */ S390_SET (buf, s390_r1, (guint *)mono_get_rethrow_preserve_exception_addr ()); s390_aghi (buf, STK_BASE, sizeof(trampStack_t)); s390_lg (buf, s390_r1, 0, s390_r1, 0); s390_lmg (buf, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET); s390_br (buf, s390_r1); PTRSLOT (buf, o[0]); /* Reload result */ s390_lg (buf, s390_r1, 0, STK_BASE, G_STRUCT_OFFSET(trampStack_t, saveFn)); /*---------------------------------------------------------- STEP 4: call the compiled method ----------------------------------------------------------*/ /* Restore parameter registers */ s390_lmg (buf, s390_r2, s390_r5, LMFReg, G_STRUCT_OFFSET(MonoLMF, gregs[2])); /* Restore the FP registers */ offset = G_STRUCT_OFFSET(MonoLMF, fregs[0]); for (i = s390_f0; i <= s390_f15; ++i) { s390_ld (buf, i, 0, LMFReg, offset); offset += sizeof(gdouble); } /* Restore stack pointer and jump to the code - * R14 contains the return address to our caller */ s390_lgr (buf, STK_BASE, s390_r11); s390_lmg (buf, s390_r6, s390_r14, STK_BASE, S390_REG_SAVE_OFFSET); if (MONO_TRAMPOLINE_TYPE_MUST_RETURN(tramp_type)) { s390_lgr (buf, s390_r2, s390_r1); s390_br (buf, s390_r14); } else { s390_br (buf, s390_r1); } /* Flush instruction cache, since we've generated code */ mono_arch_flush_icache (code, buf - code); MONO_PROFILER_RAISE (jit_code_buffer, (buf, code - buf, MONO_PROFILER_CODE_BUFFER_HELPER, NULL)); g_assert (info); tramp_name = mono_get_generic_trampoline_name (tramp_type); *info = mono_tramp_info_create (tramp_name, buf, buf - code, ji, unwind_ops); g_free (tramp_name); /* Sanity check */ g_assert ((buf - code) <= 512); return code; }