MonoContinuationRestore
mono_tasklets_arch_restore (void)
{
static guint8* saved = NULL;
guint8 *code, *start;
if (saved)
return (MonoContinuationRestore)saved;
code = start = mono_global_codeman_reserve (48);
/* the signature is: restore (MonoContinuation *cont, int state, MonoLMF **lmf_addr) */
/* put cont in edx */
x86_mov_reg_membase (code, X86_EDX, X86_ESP, 4, 4);
/* state in eax, so it's setup as the return value */
x86_mov_reg_membase (code, X86_EAX, X86_ESP, 8, 4);
/* lmf_addr in ebx */
x86_mov_reg_membase(code, X86_EBX, X86_ESP, 0x0C, 4);
/* setup the copy of the stack */
x86_mov_reg_membase (code, X86_ECX, X86_EDX, MONO_STRUCT_OFFSET (MonoContinuation, stack_used_size), 4);
x86_shift_reg_imm (code, X86_SHR, X86_ECX, 2);
x86_cld (code);
x86_mov_reg_membase (code, X86_ESI, X86_EDX, MONO_STRUCT_OFFSET (MonoContinuation, saved_stack), 4);
x86_mov_reg_membase (code, X86_EDI, X86_EDX, MONO_STRUCT_OFFSET (MonoContinuation, return_sp), 4);
x86_prefix (code, X86_REP_PREFIX);
x86_movsl (code);
/* now restore the registers from the LMF */
x86_mov_reg_membase (code, X86_ECX, X86_EDX, MONO_STRUCT_OFFSET (MonoContinuation, lmf), 4);
x86_mov_reg_membase (code, X86_EBP, X86_ECX, MONO_STRUCT_OFFSET (MonoLMF, ebp), 4);
x86_mov_reg_membase (code, X86_ESP, X86_ECX, MONO_STRUCT_OFFSET (MonoLMF, esp), 4);
/* restore the lmf chain */
/*x86_mov_reg_membase (code, X86_ECX, X86_ESP, 12, 4);
x86_mov_membase_reg (code, X86_ECX, 0, X86_EDX, 4);*/
x86_jump_membase (code, X86_EDX, MONO_STRUCT_OFFSET (MonoContinuation, return_ip));
mono_arch_flush_icache (start, code - start);
MONO_PROFILER_RAISE (jit_code_buffer, (start, code - start, MONO_PROFILER_CODE_BUFFER_EXCEPTION_HANDLING, NULL));
g_assert ((code - start) <= 48);
saved = start;
return (MonoContinuationRestore)saved;
}
MonoContinuationRestore
mono_tasklets_arch_restore (void)
{
static guint8* saved = NULL;
guint8 *code, *start;
#ifdef __native_client_codegen__
g_print("mono_tasklets_arch_restore needs to be aligned for Native Client\n");
#endif
if (saved)
return (MonoContinuationRestore)saved;
code = start = mono_global_codeman_reserve (48);
/* the signature is: restore (MonoContinuation *cont, int state, MonoLMF **lmf_addr) */
/* put cont in edx */
x86_mov_reg_membase (code, X86_EDX, X86_ESP, 4, 4);
/* state in eax, so it's setup as the return value */
x86_mov_reg_membase (code, X86_EAX, X86_ESP, 8, 4);
/* setup the copy of the stack */
x86_mov_reg_membase (code, X86_ECX, X86_EDX, G_STRUCT_OFFSET (MonoContinuation, stack_used_size), 4);
x86_shift_reg_imm (code, X86_SHR, X86_ECX, 2);
x86_cld (code);
x86_mov_reg_membase (code, X86_ESI, X86_EDX, G_STRUCT_OFFSET (MonoContinuation, saved_stack), 4);
x86_mov_reg_membase (code, X86_EDI, X86_EDX, G_STRUCT_OFFSET (MonoContinuation, return_sp), 4);
x86_prefix (code, X86_REP_PREFIX);
x86_movsl (code);
/* now restore the registers from the LMF */
x86_mov_reg_membase (code, X86_ECX, X86_EDX, G_STRUCT_OFFSET (MonoContinuation, lmf), 4);
x86_mov_reg_membase (code, X86_EBX, X86_ECX, G_STRUCT_OFFSET (MonoLMF, ebx), 4);
x86_mov_reg_membase (code, X86_EBP, X86_ECX, G_STRUCT_OFFSET (MonoLMF, ebp), 4);
x86_mov_reg_membase (code, X86_ESI, X86_ECX, G_STRUCT_OFFSET (MonoLMF, esi), 4);
x86_mov_reg_membase (code, X86_EDI, X86_ECX, G_STRUCT_OFFSET (MonoLMF, edi), 4);
/* restore the lmf chain */
/*x86_mov_reg_membase (code, X86_ECX, X86_ESP, 12, 4);
x86_mov_membase_reg (code, X86_ECX, 0, X86_EDX, 4);*/
x86_jump_membase (code, X86_EDX, G_STRUCT_OFFSET (MonoContinuation, return_ip));
g_assert ((code - start) <= 48);
saved = start;
return (MonoContinuationRestore)saved;
}