2 * tramp-sparc.c: JIT trampoline code for Sparc
5 * Mark Crichton (crichton@gimp.org)
6 * Dietmar Maurer (dietmar@ximian.com)
8 * (C) 2003 Ximian, Inc.
14 #include <mono/arch/sparc/sparc-codegen.h>
15 #include <mono/metadata/appdomain.h>
16 #include <mono/metadata/marshal.h>
17 #include <mono/metadata/tabledefs.h>
20 #include "mini-sparc.h"
23 * mono_arch_get_unbox_trampoline:
25 * @addr: pointer to native code for @m
27 * when value type methods are called through the vtable we need to unbox the
28 * this argument. This method returns a pointer to a trampoline which does
29 * unboxing before calling the method
32 mono_arch_get_unbox_trampoline (MonoMethod *m, gpointer addr)
37 start = code = mono_global_codeman_reserve (36);
39 /* This executes in the context of the caller, hence o0 */
40 sparc_add_imm (code, 0, sparc_o0, sizeof (MonoObject), sparc_o0);
46 sparc_set (code, addr, reg);
47 sparc_jmpl (code, reg, sparc_g0, sparc_g0);
50 g_assert ((code - start) <= 36);
52 mono_arch_flush_icache (start, code - start);
54 mono_tramp_info_register (mono_tramp_info_create (NULL, start, code - start, NULL, NULL), NULL);
60 mono_arch_patch_callsite (guint8 *method_start, guint8 *code, guint8 *addr)
62 if (sparc_inst_op (*(guint32*)code) == 0x1) {
63 sparc_call_simple (code, (guint8*)addr - (guint8*)code);
68 mono_arch_patch_plt_entry (guint8 *code, gpointer *got, mgreg_t *regs, guint8 *addr)
70 g_assert_not_reached ();
73 #define ALIGN_TO(val,align) (((val) + ((align) - 1)) & ~((align) - 1))
76 mono_arch_create_generic_trampoline (MonoTrampolineType tramp_type, MonoTrampInfo **info, gboolean aot)
78 guint8 *buf, *code, *tramp_addr;
79 guint32 lmf_offset, regs_offset, method_reg, i;
85 if (tramp_type == MONO_TRAMPOLINE_JUMP)
90 code = buf = mono_global_codeman_reserve (1024);
92 sparc_save_imm (code, sparc_sp, -1608, sparc_sp);
95 method_reg = sparc_g4;
97 method_reg = sparc_g1;
100 regs_offset = MONO_SPARC_STACK_BIAS + 1000;
102 /* Save r1 needed by the IMT code */
103 sparc_sti_imm (code, sparc_g1, sparc_sp, regs_offset + (sparc_g1 * sizeof (gpointer)));
106 * sparc_g5 contains the return address, the trampoline argument is stored in the
107 * instruction stream after the call.
109 sparc_ld_imm (code, sparc_g5, 8, method_reg);
112 /* Save fp regs since they are not preserved by calls */
113 for (i = 0; i < 16; i ++)
114 sparc_stdf_imm (code, sparc_f0 + (i * 2), sparc_sp, MONO_SPARC_STACK_BIAS + 320 + (i * 8));
117 /* We receive the method address in %r1, so save it here */
118 sparc_sti_imm (code, method_reg, sparc_sp, MONO_SPARC_STACK_BIAS + 200);
120 /* Save lmf since compilation can raise exceptions */
121 lmf_offset = MONO_SPARC_STACK_BIAS - sizeof (MonoLMF);
123 /* Save the data for the parent (managed) frame */
126 sparc_sti_imm (code, sparc_i7, sparc_fp, lmf_offset + G_STRUCT_OFFSET (MonoLMF, ip));
128 sparc_sti_imm (code, sparc_fp, sparc_fp, lmf_offset + G_STRUCT_OFFSET (MonoLMF, sp));
130 /* Load previous fp from the saved register window */
132 sparc_ldi_imm (code, sparc_fp, MONO_SPARC_STACK_BIAS + (sparc_i6 - 16) * sizeof (gpointer), sparc_o7);
133 sparc_sti_imm (code, sparc_o7, sparc_fp, lmf_offset + G_STRUCT_OFFSET (MonoLMF, ebp));
135 sparc_sti_imm (code, method_reg, sparc_fp, lmf_offset + G_STRUCT_OFFSET (MonoLMF, method));
137 sparc_set (code, mono_get_lmf_addr, sparc_o7);
138 sparc_jmpl (code, sparc_o7, sparc_g0, sparc_o7);
141 code = mono_sparc_emit_save_lmf (code, lmf_offset);
144 /* Load all registers of the caller into a table inside this frame */
145 /* first the out registers */
146 for (i = 0; i < 8; ++i)
147 sparc_sti_imm (code, sparc_i0 + i, sparc_sp, regs_offset + ((sparc_o0 + i) * sizeof (gpointer)));
148 /* then the in+local registers */
149 for (i = 0; i < 16; i ++) {
150 sparc_ldi_imm (code, sparc_fp, MONO_SPARC_STACK_BIAS + (i * sizeof (gpointer)), sparc_o7);
151 sparc_sti_imm (code, sparc_o7, sparc_sp, regs_offset + ((sparc_l0 + i) * sizeof (gpointer)));
155 tramp_addr = mono_get_trampoline_func (tramp_type);
156 sparc_ldi_imm (code, sparc_sp, MONO_SPARC_STACK_BIAS + 200, sparc_o2);
157 /* pass address of register table as third argument */
158 sparc_add_imm (code, FALSE, sparc_sp, regs_offset, sparc_o0);
159 sparc_set (code, tramp_addr, sparc_o7);
160 /* set %o1 to caller address */
162 sparc_mov_reg_reg (code, sparc_i7, sparc_o1);
164 sparc_set (code, 0, sparc_o1);
165 sparc_set (code, 0, sparc_o3);
166 sparc_jmpl (code, sparc_o7, sparc_g0, sparc_o7);
170 sparc_sti_imm (code, sparc_o0, sparc_sp, MONO_SPARC_STACK_BIAS + 304);
172 /* Check for thread interruption */
173 sparc_set (code, (guint8*)mono_thread_force_interruption_checkpoint, sparc_o7);
174 sparc_jmpl (code, sparc_o7, sparc_g0, sparc_o7);
178 code = mono_sparc_emit_restore_lmf (code, lmf_offset);
181 sparc_ldi_imm (code, sparc_sp, MONO_SPARC_STACK_BIAS + 304, sparc_o0);
185 for (i = 0; i < 16; i ++)
186 sparc_lddf_imm (code, sparc_sp, MONO_SPARC_STACK_BIAS + 320 + (i * 8), sparc_f0 + (i * 2));
189 sparc_jmpl (code, sparc_o0, sparc_g0, sparc_g0);
191 /* restore previous frame in delay slot */
192 sparc_restore_simple (code);
198 sparc_save_imm (code, sparc_sp, -608, sparc_sp);
200 sparc_call_simple (code, 16);
202 sparc_rett_simple (code);
205 sparc_save_imm (code, sparc_sp, -608, sparc_sp);
207 tramp_addr = &sparc_magic_trampoline;
208 sparc_call_simple (code, tramp_addr - code);
210 sparc_rett_simple (code);
215 g_assert ((code - buf) <= 512);
217 mono_arch_flush_icache (buf, code - buf);
222 #define TRAMPOLINE_SIZE (SPARC_SET_MAX_SIZE + 3)
225 mono_arch_create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
227 guint32 *code, *buf, *tramp;
229 tramp = mono_get_trampoline_code (tramp_type);
231 code = buf = mono_domain_code_reserve (domain, TRAMPOLINE_SIZE * 4);
233 /* We have to use g5 here because there is no other free register */
234 sparc_set (code, tramp, sparc_g5);
235 sparc_jmpl (code, sparc_g5, sparc_g0, sparc_g5);
238 g_assert_not_reached ();
240 *code = (guint32)arg1;
244 g_assert ((code - buf) <= TRAMPOLINE_SIZE);
247 *code_len = (code - buf) * 4;
249 mono_arch_flush_icache ((guint8*)buf, (code - buf) * 4);
255 mono_arch_create_rgctx_lazy_fetch_trampoline (guint32 slot, MonoTrampInfo **info, gboolean aot)
257 /* FIXME: implement! */
258 g_assert_not_reached ();