264 lines
7.3 KiB
C
264 lines
7.3 KiB
C
/**
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* \file
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* JIT trampoline code for Sparc
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*
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* Authors:
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* Mark Crichton (crichton@gimp.org)
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* Dietmar Maurer (dietmar@ximian.com)
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*
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* (C) 2003 Ximian, Inc.
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*/
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#include <config.h>
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#include <glib.h>
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#include <mono/arch/sparc/sparc-codegen.h>
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#include <mono/metadata/appdomain.h>
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#include <mono/metadata/marshal.h>
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#include <mono/metadata/tabledefs.h>
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#include "mini.h"
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#include "mini-sparc.h"
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#include "jit-icalls.h"
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/*
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* mono_arch_get_unbox_trampoline:
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* @m: method pointer
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* @addr: pointer to native code for @m
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*
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* when value type methods are called through the vtable we need to unbox the
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* this argument. This method returns a pointer to a trampoline which does
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* unboxing before calling the method
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*/
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gpointer
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mono_arch_get_unbox_trampoline (MonoMethod *m, gpointer addr)
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{
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guint8 *code, *start;
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int reg;
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start = code = mono_domain_code_reserve (mono_domain_get (), 36);
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/* This executes in the context of the caller, hence o0 */
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sparc_add_imm (code, 0, sparc_o0, MONO_ABI_SIZEOF (MonoObject), sparc_o0);
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#ifdef SPARCV9
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reg = sparc_g4;
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#else
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reg = sparc_g1;
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#endif
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sparc_set (code, addr, reg);
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sparc_jmpl (code, reg, sparc_g0, sparc_g0);
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sparc_nop (code);
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g_assert ((code - start) <= 36);
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mono_arch_flush_icache (start, code - start);
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MONO_PROFILER_RAISE (jit_code_buffer, (start, code - start, MONO_PROFILER_CODE_BUFFER_UNBOX_TRAMPOLINE, m));
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mono_tramp_info_register (mono_tramp_info_create (NULL, start, code - start, NULL, NULL), NULL);
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return start;
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}
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void
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mono_arch_patch_callsite (guint8 *method_start, guint8 *code, guint8 *addr)
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{
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if (sparc_inst_op (*(guint32*)code) == 0x1) {
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sparc_call_simple (code, (guint8*)addr - (guint8*)code);
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}
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}
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void
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mono_arch_patch_plt_entry (guint8 *code, gpointer *got, mgreg_t *regs, guint8 *addr)
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{
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g_assert_not_reached ();
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}
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guchar*
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mono_arch_create_generic_trampoline (MonoTrampolineType tramp_type, MonoTrampInfo **info, gboolean aot)
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{
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guint8 *buf, *code, *tramp_addr;
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guint32 lmf_offset, regs_offset, method_reg, i;
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gboolean has_caller;
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g_assert (!aot);
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*info = NULL;
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if (tramp_type == MONO_TRAMPOLINE_JUMP)
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has_caller = FALSE;
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else
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has_caller = TRUE;
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code = buf = mono_global_codeman_reserve (1024);
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sparc_save_imm (code, sparc_sp, -1608, sparc_sp);
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#ifdef SPARCV9
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method_reg = sparc_g4;
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#else
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method_reg = sparc_g1;
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#endif
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regs_offset = MONO_SPARC_STACK_BIAS + 1000;
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/* Save r1 needed by the IMT code */
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sparc_sti_imm (code, sparc_g1, sparc_sp, regs_offset + (sparc_g1 * sizeof (gpointer)));
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/*
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* sparc_g5 contains the return address, the trampoline argument is stored in the
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* instruction stream after the call.
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*/
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sparc_ld_imm (code, sparc_g5, 8, method_reg);
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#ifdef SPARCV9
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/* Save fp regs since they are not preserved by calls */
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for (i = 0; i < 16; i ++)
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sparc_stdf_imm (code, sparc_f0 + (i * 2), sparc_sp, MONO_SPARC_STACK_BIAS + 320 + (i * 8));
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#endif
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/* We receive the method address in %r1, so save it here */
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sparc_sti_imm (code, method_reg, sparc_sp, MONO_SPARC_STACK_BIAS + 200);
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/* Save lmf since compilation can raise exceptions */
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lmf_offset = MONO_SPARC_STACK_BIAS - sizeof (MonoLMF);
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/* Save the data for the parent (managed) frame */
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/* Save ip */
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sparc_sti_imm (code, sparc_i7, sparc_fp, lmf_offset + G_STRUCT_OFFSET (MonoLMF, ip));
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/* Save sp */
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sparc_sti_imm (code, sparc_fp, sparc_fp, lmf_offset + G_STRUCT_OFFSET (MonoLMF, sp));
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/* Save fp */
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/* Load previous fp from the saved register window */
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sparc_flushw (code);
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sparc_ldi_imm (code, sparc_fp, MONO_SPARC_STACK_BIAS + (sparc_i6 - 16) * sizeof (gpointer), sparc_o7);
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sparc_sti_imm (code, sparc_o7, sparc_fp, lmf_offset + G_STRUCT_OFFSET (MonoLMF, ebp));
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/* Save method */
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sparc_sti_imm (code, method_reg, sparc_fp, lmf_offset + G_STRUCT_OFFSET (MonoLMF, method));
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sparc_set (code, mono_get_lmf_addr, sparc_o7);
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sparc_jmpl (code, sparc_o7, sparc_g0, sparc_o7);
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sparc_nop (code);
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code = mono_sparc_emit_save_lmf (code, lmf_offset);
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if (has_caller) {
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/* Load all registers of the caller into a table inside this frame */
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/* first the out registers */
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for (i = 0; i < 8; ++i)
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sparc_sti_imm (code, sparc_i0 + i, sparc_sp, regs_offset + ((sparc_o0 + i) * sizeof (gpointer)));
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/* then the in+local registers */
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for (i = 0; i < 16; i ++) {
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sparc_ldi_imm (code, sparc_fp, MONO_SPARC_STACK_BIAS + (i * sizeof (gpointer)), sparc_o7);
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sparc_sti_imm (code, sparc_o7, sparc_sp, regs_offset + ((sparc_l0 + i) * sizeof (gpointer)));
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}
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}
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tramp_addr = mono_get_trampoline_func (tramp_type);
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sparc_ldi_imm (code, sparc_sp, MONO_SPARC_STACK_BIAS + 200, sparc_o2);
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/* pass address of register table as third argument */
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sparc_add_imm (code, FALSE, sparc_sp, regs_offset, sparc_o0);
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sparc_set (code, tramp_addr, sparc_o7);
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/* set %o1 to caller address */
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if (has_caller)
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sparc_mov_reg_reg (code, sparc_i7, sparc_o1);
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else
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sparc_set (code, 0, sparc_o1);
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sparc_set (code, 0, sparc_o3);
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sparc_jmpl (code, sparc_o7, sparc_g0, sparc_o7);
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sparc_nop (code);
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/* Save result */
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sparc_sti_imm (code, sparc_o0, sparc_sp, MONO_SPARC_STACK_BIAS + 304);
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/* Check for thread interruption */
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sparc_set (code, (guint8*)mono_interruption_checkpoint_from_trampoline_deprecated, sparc_o7);
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sparc_jmpl (code, sparc_o7, sparc_g0, sparc_o7);
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sparc_nop (code);
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/* Restore lmf */
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code = mono_sparc_emit_restore_lmf (code, lmf_offset);
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/* Reload result */
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sparc_ldi_imm (code, sparc_sp, MONO_SPARC_STACK_BIAS + 304, sparc_o0);
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#ifdef SPARCV9
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/* Reload fp regs */
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for (i = 0; i < 16; i ++)
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sparc_lddf_imm (code, sparc_sp, MONO_SPARC_STACK_BIAS + 320 + (i * 8), sparc_f0 + (i * 2));
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#endif
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sparc_jmpl (code, sparc_o0, sparc_g0, sparc_g0);
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/* restore previous frame in delay slot */
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sparc_restore_simple (code);
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/*
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{
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gpointer addr;
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sparc_save_imm (code, sparc_sp, -608, sparc_sp);
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addr = code;
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sparc_call_simple (code, 16);
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sparc_nop (code);
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sparc_rett_simple (code);
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sparc_nop (code);
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sparc_save_imm (code, sparc_sp, -608, sparc_sp);
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sparc_ta (code, 1);
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tramp_addr = &sparc_magic_trampoline;
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sparc_call_simple (code, tramp_addr - code);
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sparc_nop (code);
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sparc_rett_simple (code);
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sparc_nop (code);
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}
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*/
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g_assert ((code - buf) <= 512);
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mono_arch_flush_icache (buf, code - buf);
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MONO_PROFILER_RAISE (jit_code_buffer, (buf, code - buf, MONO_PROFILER_CODE_BUFFER_HELPER, NULL));
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return buf;
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}
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#define TRAMPOLINE_SIZE (SPARC_SET_MAX_SIZE + 3)
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gpointer
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mono_arch_create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
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{
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guint32 *code, *buf, *tramp;
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tramp = mono_get_trampoline_code (tramp_type);
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code = buf = mono_domain_code_reserve (domain, TRAMPOLINE_SIZE * 4);
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/* We have to use g5 here because there is no other free register */
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sparc_set (code, tramp, sparc_g5);
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sparc_jmpl (code, sparc_g5, sparc_g0, sparc_g5);
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sparc_nop (code);
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#ifdef SPARCV9
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g_assert_not_reached ();
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#else
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*code = (guint32)arg1;
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code ++;
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#endif
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g_assert ((code - buf) <= TRAMPOLINE_SIZE);
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if (code_len)
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*code_len = (code - buf);
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mono_arch_flush_icache ((guint8*)buf, (code - buf));
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MONO_PROFILER_RAISE (jit_code_buffer, (buf, code - buf, MONO_PROFILER_CODE_BUFFER_SPECIFIC_TRAMPOLINE, mono_get_generic_trampoline_simple_name (tramp_type)));
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return buf;
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}
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gpointer
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mono_arch_create_rgctx_lazy_fetch_trampoline (guint32 slot, MonoTrampInfo **info, gboolean aot)
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{
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/* FIXME: implement! */
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g_assert_not_reached ();
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return NULL;
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}
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