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);
58 mono_arch_patch_callsite (guint8 *method_start, guint8 *code, guint8 *addr)
60 if (sparc_inst_op (*(guint32*)code) == 0x1) {
61 sparc_call_simple (code, (guint8*)addr - (guint8*)code);
66 mono_arch_patch_plt_entry (guint8 *code, gpointer *got, mgreg_t *regs, guint8 *addr)
68 g_assert_not_reached ();
72 mono_arch_nullify_class_init_trampoline (guint8 *code, mgreg_t *regs)
74 /* Patch calling code */
78 #define ALIGN_TO(val,align) (((val) + ((align) - 1)) & ~((align) - 1))
81 mono_arch_create_generic_trampoline (MonoTrampolineType tramp_type, MonoTrampInfo **info, gboolean aot)
83 guint8 *buf, *code, *tramp_addr;
84 guint32 lmf_offset, regs_offset, method_reg, i;
91 if (tramp_type == MONO_TRAMPOLINE_JUMP)
96 code = buf = mono_global_codeman_reserve (1024);
98 sparc_save_imm (code, sparc_sp, -1608, sparc_sp);
101 method_reg = sparc_g4;
103 method_reg = sparc_g1;
106 regs_offset = MONO_SPARC_STACK_BIAS + 1000;
108 /* Save r1 needed by the IMT code */
109 sparc_sti_imm (code, sparc_g1, sparc_sp, regs_offset + (sparc_g1 * sizeof (gpointer)));
112 * sparc_g5 contains the return address, the trampoline argument is stored in the
113 * instruction stream after the call.
115 sparc_ld_imm (code, sparc_g5, 8, method_reg);
118 /* Save fp regs since they are not preserved by calls */
119 for (i = 0; i < 16; i ++)
120 sparc_stdf_imm (code, sparc_f0 + (i * 2), sparc_sp, MONO_SPARC_STACK_BIAS + 320 + (i * 8));
123 /* We receive the method address in %r1, so save it here */
124 sparc_sti_imm (code, method_reg, sparc_sp, MONO_SPARC_STACK_BIAS + 200);
126 /* Save lmf since compilation can raise exceptions */
127 lmf_offset = MONO_SPARC_STACK_BIAS - sizeof (MonoLMF);
129 /* Save the data for the parent (managed) frame */
132 sparc_sti_imm (code, sparc_i7, sparc_fp, lmf_offset + G_STRUCT_OFFSET (MonoLMF, ip));
134 sparc_sti_imm (code, sparc_fp, sparc_fp, lmf_offset + G_STRUCT_OFFSET (MonoLMF, sp));
136 /* Load previous fp from the saved register window */
138 sparc_ldi_imm (code, sparc_fp, MONO_SPARC_STACK_BIAS + (sparc_i6 - 16) * sizeof (gpointer), sparc_o7);
139 sparc_sti_imm (code, sparc_o7, sparc_fp, lmf_offset + G_STRUCT_OFFSET (MonoLMF, ebp));
141 sparc_sti_imm (code, method_reg, sparc_fp, lmf_offset + G_STRUCT_OFFSET (MonoLMF, method));
143 sparc_set (code, mono_get_lmf_addr, sparc_o7);
144 sparc_jmpl (code, sparc_o7, sparc_g0, sparc_o7);
147 code = mono_sparc_emit_save_lmf (code, lmf_offset);
150 /* Load all registers of the caller into a table inside this frame */
151 /* first the out registers */
152 for (i = 0; i < 8; ++i)
153 sparc_sti_imm (code, sparc_i0 + i, sparc_sp, regs_offset + ((sparc_o0 + i) * sizeof (gpointer)));
154 /* then the in+local registers */
155 for (i = 0; i < 16; i ++) {
156 sparc_ldi_imm (code, sparc_fp, MONO_SPARC_STACK_BIAS + (i * sizeof (gpointer)), sparc_o7);
157 sparc_sti_imm (code, sparc_o7, sparc_sp, regs_offset + ((sparc_l0 + i) * sizeof (gpointer)));
161 tramp_addr = mono_get_trampoline_func (tramp_type);
162 sparc_ldi_imm (code, sparc_sp, MONO_SPARC_STACK_BIAS + 200, sparc_o2);
163 /* pass address of register table as third argument */
164 sparc_add_imm (code, FALSE, sparc_sp, regs_offset, sparc_o0);
165 sparc_set (code, tramp_addr, sparc_o7);
166 /* set %o1 to caller address */
168 sparc_mov_reg_reg (code, sparc_i7, sparc_o1);
170 sparc_set (code, 0, sparc_o1);
171 sparc_set (code, 0, sparc_o3);
172 sparc_jmpl (code, sparc_o7, sparc_g0, sparc_o7);
176 sparc_sti_imm (code, sparc_o0, sparc_sp, MONO_SPARC_STACK_BIAS + 304);
178 /* Check for thread interruption */
179 sparc_set (code, (guint8*)mono_thread_force_interruption_checkpoint, sparc_o7);
180 sparc_jmpl (code, sparc_o7, sparc_g0, sparc_o7);
184 code = mono_sparc_emit_restore_lmf (code, lmf_offset);
187 sparc_ldi_imm (code, sparc_sp, MONO_SPARC_STACK_BIAS + 304, sparc_o0);
191 for (i = 0; i < 16; i ++)
192 sparc_lddf_imm (code, sparc_sp, MONO_SPARC_STACK_BIAS + 320 + (i * 8), sparc_f0 + (i * 2));
195 if (tramp_type == MONO_TRAMPOLINE_CLASS_INIT)
198 sparc_jmpl (code, sparc_o0, sparc_g0, sparc_g0);
200 /* restore previous frame in delay slot */
201 sparc_restore_simple (code);
207 sparc_save_imm (code, sparc_sp, -608, sparc_sp);
209 sparc_call_simple (code, 16);
211 sparc_rett_simple (code);
214 sparc_save_imm (code, sparc_sp, -608, sparc_sp);
216 tramp_addr = &sparc_magic_trampoline;
217 sparc_call_simple (code, tramp_addr - code);
219 sparc_rett_simple (code);
224 g_assert ((code - buf) <= 512);
226 mono_arch_flush_icache (buf, code - buf);
231 #define TRAMPOLINE_SIZE (SPARC_SET_MAX_SIZE + 3)
234 mono_arch_create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
236 guint32 *code, *buf, *tramp;
238 tramp = mono_get_trampoline_code (tramp_type);
240 code = buf = mono_domain_code_reserve (domain, TRAMPOLINE_SIZE * 4);
242 /* We have to use g5 here because there is no other free register */
243 sparc_set (code, tramp, sparc_g5);
244 sparc_jmpl (code, sparc_g5, sparc_g0, sparc_g5);
247 g_assert_not_reached ();
249 *code = (guint32)arg1;
253 g_assert ((code - buf) <= TRAMPOLINE_SIZE);
256 *code_len = (code - buf) * 4;
258 mono_arch_flush_icache ((guint8*)buf, (code - buf) * 4);
264 mono_arch_create_rgctx_lazy_fetch_trampoline (guint32 slot, MonoTrampInfo **info, gboolean aot)
266 /* FIXME: implement! */
267 g_assert_not_reached ();
272 mono_arch_get_nullified_class_init_trampoline (MonoTrampInfo **info)
276 code = buf = mono_global_codeman_reserve (16);
280 mono_arch_flush_icache (buf, code - buf);
283 *info = mono_tramp_info_create ("nullified_class_init_trampoline", buf, code - buf, NULL, NULL);