/*
* mono_arch_get_unbox_trampoline:
* @m: method pointer
* @addr: pointer to native code for @m
*
* when value type methods are called through the vtable we need to unbox the
* this argument. This method returns a pointer to a trampoline which does
* unboxing before calling the method
*/
gpointer
mono_arch_get_unbox_trampoline (MonoMethod *m, gpointer addr)
{
guint8 *code, *start;
int reg;
start = code = mono_global_codeman_reserve (36);
/* This executes in the context of the caller, hence o0 */
sparc_add_imm (code, 0, sparc_o0, sizeof (MonoObject), sparc_o0);
#ifdef SPARCV9
reg = sparc_g4;
#else
reg = sparc_g1;
#endif
sparc_set (code, addr, reg);
sparc_jmpl (code, reg, sparc_g0, sparc_g0);
sparc_nop (code);
g_assert ((code - start) <= 36);
mono_arch_flush_icache (start, code - start);
mono_tramp_info_register (mono_tramp_info_create (NULL, start, code - start, NULL, NULL), NULL);
return start;
}
gpointer
mono_arch_create_specific_trampoline (gpointer arg1, MonoTrampolineType tramp_type, MonoDomain *domain, guint32 *code_len)
{
guint32 *code, *buf, *tramp;
tramp = mono_get_trampoline_code (tramp_type);
code = buf = mono_domain_code_reserve (domain, TRAMPOLINE_SIZE * 4);
/* We have to use g5 here because there is no other free register */
sparc_set (code, tramp, sparc_g5);
sparc_jmpl (code, sparc_g5, sparc_g0, sparc_g5);
sparc_nop (code);
#ifdef SPARCV9
g_assert_not_reached ();
#else
*code = (guint32)arg1;
code ++;
#endif
g_assert ((code - buf) <= TRAMPOLINE_SIZE);
if (code_len)
*code_len = (code - buf) * 4;
mono_arch_flush_icache ((guint8*)buf, (code - buf) * 4);
return buf;
}
/**
* mono_arch_get_throw_corlib_exception:
*
* Returns a function pointer which can be used to raise
* corlib exceptions. The returned function has the following
* signature: void (*func) (guint32 ex_token, guint32 offset);
* Here, offset is the offset which needs to be substracted from the caller IP
* to get the IP of the throw. Passing the offset has the advantage that it
* needs no relocations in the caller.
*/
gpointer
mono_arch_get_throw_corlib_exception (MonoTrampInfo **info, gboolean aot)
{
static guint32 *start;
static int inited = 0;
guint32 *code;
int reg;
g_assert (!aot);
if (info)
*info = NULL;
if (inited)
return start;
inited = 1;
code = start = mono_global_codeman_reserve (64 * sizeof (guint32));
#ifdef SPARCV9
reg = sparc_g4;
#else
reg = sparc_g1;
#endif
sparc_mov_reg_reg (code, sparc_o7, sparc_o2);
sparc_save_imm (code, sparc_sp, -160, sparc_sp);
sparc_set (code, MONO_TOKEN_TYPE_DEF, sparc_o7);
sparc_add (code, FALSE, sparc_i0, sparc_o7, sparc_o1);
sparc_set (code, mono_defaults.exception_class->image, sparc_o0);
sparc_set (code, mono_exception_from_token, sparc_o7);
sparc_jmpl (code, sparc_o7, sparc_g0, sparc_callsite);
sparc_nop (code);
/* Return to the caller, so exception handling does not see this frame */
sparc_restore (code, sparc_o0, sparc_g0, sparc_o0);
/* Compute throw ip */
sparc_sll_imm (code, sparc_o1, 2, sparc_o1);
sparc_sub (code, 0, sparc_o2, sparc_o1, sparc_o7);
sparc_set (code, mono_arch_get_throw_exception (NULL, FALSE), reg);
/* Use a jmp instead of a call so o7 is preserved */
sparc_jmpl_imm (code, reg, 0, sparc_g0);
sparc_nop (code);
g_assert ((code - start) < 32);
mono_arch_flush_icache ((guint8*)start, (guint8*)code - (guint8*)start);
return start;
}
/**
* mono_arch_get_throw_exception_by_name:
*
* Returns a function pointer which can be used to raise
* corlib exceptions. The returned function has the following
* signature: void (*func) (char *exc_name, gpointer ip);
*/
gpointer
mono_arch_get_throw_exception_by_name (void)
{
static guint32 *start;
static int inited = 0;
guint32 *code;
int reg;
if (inited)
return start;
inited = 1;
code = start = mono_global_codeman_reserve (64 * sizeof (guint32));
#ifdef SPARCV9
reg = sparc_g4;
#else
reg = sparc_g1;
#endif
sparc_save_imm (code, sparc_sp, -160, sparc_sp);
sparc_mov_reg_reg (code, sparc_i0, sparc_o2);
sparc_set (code, mono_defaults.corlib, sparc_o0);
sparc_set (code, "System", sparc_o1);
sparc_set (code, mono_exception_from_name, sparc_o7);
sparc_jmpl (code, sparc_o7, sparc_g0, sparc_callsite);
sparc_nop (code);
/* Return to the caller, so exception handling does not see this frame */
sparc_restore (code, sparc_o0, sparc_g0, sparc_o0);
/* Put original return address into %o7 */
sparc_mov_reg_reg (code, sparc_o1, sparc_o7);
sparc_set (code, mono_arch_get_throw_exception (), reg);
/* Use a jmp instead of a call so o7 is preserved */
sparc_jmpl_imm (code, reg, 0, sparc_g0);
sparc_nop (code);
g_assert ((code - start) < 32);
mono_arch_flush_icache ((guint8*)start, (guint8*)code - (guint8*)start);
return start;
}
static gpointer
get_throw_exception (gboolean rethrow)
{
guint32 *start, *code;
code = start = mono_global_codeman_reserve (16 * sizeof (guint32));
sparc_save_imm (code, sparc_sp, -512, sparc_sp);
sparc_flushw (code);
sparc_mov_reg_reg (code, sparc_i0, sparc_o0);
sparc_mov_reg_reg (code, sparc_fp, sparc_o1);
sparc_mov_reg_reg (code, sparc_i7, sparc_o2);
sparc_set (code, rethrow, sparc_o3);
sparc_set (code, throw_exception, sparc_o7);
sparc_jmpl (code, sparc_o7, sparc_g0, sparc_callsite);
sparc_nop (code);
g_assert ((code - start) <= 16);
mono_arch_flush_icache ((guint8*)start, (guint8*)code - (guint8*)start);
return start;
}
guchar*
mono_arch_create_generic_trampoline (MonoTrampolineType tramp_type, MonoTrampInfo **info, gboolean aot)
{
guint8 *buf, *code, *tramp_addr;
guint32 lmf_offset, regs_offset, method_reg, i;
gboolean has_caller;
g_assert (!aot);
*info = NULL;
if (tramp_type == MONO_TRAMPOLINE_JUMP)
has_caller = FALSE;
else
has_caller = TRUE;
code = buf = mono_global_codeman_reserve (1024);
sparc_save_imm (code, sparc_sp, -1608, sparc_sp);
#ifdef SPARCV9
method_reg = sparc_g4;
#else
method_reg = sparc_g1;
#endif
regs_offset = MONO_SPARC_STACK_BIAS + 1000;
/* Save r1 needed by the IMT code */
sparc_sti_imm (code, sparc_g1, sparc_sp, regs_offset + (sparc_g1 * sizeof (gpointer)));
/*
* sparc_g5 contains the return address, the trampoline argument is stored in the
* instruction stream after the call.
*/
sparc_ld_imm (code, sparc_g5, 8, method_reg);
#ifdef SPARCV9
/* Save fp regs since they are not preserved by calls */
for (i = 0; i < 16; i ++)
sparc_stdf_imm (code, sparc_f0 + (i * 2), sparc_sp, MONO_SPARC_STACK_BIAS + 320 + (i * 8));
#endif
/* We receive the method address in %r1, so save it here */
sparc_sti_imm (code, method_reg, sparc_sp, MONO_SPARC_STACK_BIAS + 200);
/* Save lmf since compilation can raise exceptions */
lmf_offset = MONO_SPARC_STACK_BIAS - sizeof (MonoLMF);
/* Save the data for the parent (managed) frame */
/* Save ip */
sparc_sti_imm (code, sparc_i7, sparc_fp, lmf_offset + G_STRUCT_OFFSET (MonoLMF, ip));
/* Save sp */
sparc_sti_imm (code, sparc_fp, sparc_fp, lmf_offset + G_STRUCT_OFFSET (MonoLMF, sp));
/* Save fp */
/* Load previous fp from the saved register window */
sparc_flushw (code);
sparc_ldi_imm (code, sparc_fp, MONO_SPARC_STACK_BIAS + (sparc_i6 - 16) * sizeof (gpointer), sparc_o7);
sparc_sti_imm (code, sparc_o7, sparc_fp, lmf_offset + G_STRUCT_OFFSET (MonoLMF, ebp));
/* Save method */
sparc_sti_imm (code, method_reg, sparc_fp, lmf_offset + G_STRUCT_OFFSET (MonoLMF, method));
sparc_set (code, mono_get_lmf_addr, sparc_o7);
sparc_jmpl (code, sparc_o7, sparc_g0, sparc_o7);
sparc_nop (code);
code = mono_sparc_emit_save_lmf (code, lmf_offset);
if (has_caller) {
/* Load all registers of the caller into a table inside this frame */
/* first the out registers */
for (i = 0; i < 8; ++i)
sparc_sti_imm (code, sparc_i0 + i, sparc_sp, regs_offset + ((sparc_o0 + i) * sizeof (gpointer)));
/* then the in+local registers */
for (i = 0; i < 16; i ++) {
sparc_ldi_imm (code, sparc_fp, MONO_SPARC_STACK_BIAS + (i * sizeof (gpointer)), sparc_o7);
sparc_sti_imm (code, sparc_o7, sparc_sp, regs_offset + ((sparc_l0 + i) * sizeof (gpointer)));
}
}
tramp_addr = mono_get_trampoline_func (tramp_type);
sparc_ldi_imm (code, sparc_sp, MONO_SPARC_STACK_BIAS + 200, sparc_o2);
/* pass address of register table as third argument */
sparc_add_imm (code, FALSE, sparc_sp, regs_offset, sparc_o0);
sparc_set (code, tramp_addr, sparc_o7);
/* set %o1 to caller address */
if (has_caller)
sparc_mov_reg_reg (code, sparc_i7, sparc_o1);
else
sparc_set (code, 0, sparc_o1);
sparc_set (code, 0, sparc_o3);
sparc_jmpl (code, sparc_o7, sparc_g0, sparc_o7);
sparc_nop (code);
/* Save result */
sparc_sti_imm (code, sparc_o0, sparc_sp, MONO_SPARC_STACK_BIAS + 304);
/* Check for thread interruption */
sparc_set (code, (guint8*)mono_thread_force_interruption_checkpoint, sparc_o7);
sparc_jmpl (code, sparc_o7, sparc_g0, sparc_o7);
sparc_nop (code);
/* Restore lmf */
code = mono_sparc_emit_restore_lmf (code, lmf_offset);
/* Reload result */
sparc_ldi_imm (code, sparc_sp, MONO_SPARC_STACK_BIAS + 304, sparc_o0);
#ifdef SPARCV9
/* Reload fp regs */
for (i = 0; i < 16; i ++)
sparc_lddf_imm (code, sparc_sp, MONO_SPARC_STACK_BIAS + 320 + (i * 8), sparc_f0 + (i * 2));
#endif
sparc_jmpl (code, sparc_o0, sparc_g0, sparc_g0);
/* restore previous frame in delay slot */
sparc_restore_simple (code);
/*
{
gpointer addr;
sparc_save_imm (code, sparc_sp, -608, sparc_sp);
addr = code;
sparc_call_simple (code, 16);
sparc_nop (code);
sparc_rett_simple (code);
sparc_nop (code);
sparc_save_imm (code, sparc_sp, -608, sparc_sp);
sparc_ta (code, 1);
tramp_addr = &sparc_magic_trampoline;
sparc_call_simple (code, tramp_addr - code);
sparc_nop (code);
sparc_rett_simple (code);
sparc_nop (code);
}
*/
g_assert ((code - buf) <= 512);
mono_arch_flush_icache (buf, code - buf);
return buf;
}
