MonoContinuationRestore
mono_tasklets_arch_restore (void)
{
static guint8* saved = NULL;
guint8 *code, *start;
int cont_reg = AMD64_R9; /* register usable on both call conventions */
const guint kMaxCodeSize = NACL_SIZE (64, 128);
if (saved)
return (MonoContinuationRestore)saved;
code = start = mono_global_codeman_reserve (kMaxCodeSize);
/* the signature is: restore (MonoContinuation *cont, int state, MonoLMF **lmf_addr) */
/* cont is in AMD64_ARG_REG1 ($rcx or $rdi)
* state is in AMD64_ARG_REG2 ($rdx or $rsi)
* lmf_addr is in AMD64_ARG_REG3 ($r8 or $rdx)
* We move cont to cont_reg since we need both rcx and rdi for the copy
* state is moved to $rax so it's setup as the return value and we can overwrite $rsi
*/
amd64_mov_reg_reg (code, cont_reg, MONO_AMD64_ARG_REG1, 8);
amd64_mov_reg_reg (code, AMD64_RAX, MONO_AMD64_ARG_REG2, 8);
/* setup the copy of the stack */
amd64_mov_reg_membase (code, AMD64_RCX, cont_reg, G_STRUCT_OFFSET (MonoContinuation, stack_used_size), sizeof (int));
amd64_shift_reg_imm (code, X86_SHR, AMD64_RCX, 3);
x86_cld (code);
amd64_mov_reg_membase (code, AMD64_RSI, cont_reg, G_STRUCT_OFFSET (MonoContinuation, saved_stack), sizeof (gpointer));
amd64_mov_reg_membase (code, AMD64_RDI, cont_reg, G_STRUCT_OFFSET (MonoContinuation, return_sp), sizeof (gpointer));
amd64_prefix (code, X86_REP_PREFIX);
amd64_movsl (code);
/* now restore the registers from the LMF */
amd64_mov_reg_membase (code, AMD64_RCX, cont_reg, G_STRUCT_OFFSET (MonoContinuation, lmf), 8);
amd64_mov_reg_membase (code, AMD64_RBX, AMD64_RCX, G_STRUCT_OFFSET (MonoLMF, rbx), 8);
amd64_mov_reg_membase (code, AMD64_RBP, AMD64_RCX, G_STRUCT_OFFSET (MonoLMF, rbp), 8);
amd64_mov_reg_membase (code, AMD64_R12, AMD64_RCX, G_STRUCT_OFFSET (MonoLMF, r12), 8);
amd64_mov_reg_membase (code, AMD64_R13, AMD64_RCX, G_STRUCT_OFFSET (MonoLMF, r13), 8);
amd64_mov_reg_membase (code, AMD64_R14, AMD64_RCX, G_STRUCT_OFFSET (MonoLMF, r14), 8);
#if !defined(__native_client_codegen__)
amd64_mov_reg_membase (code, AMD64_R15, AMD64_RCX, G_STRUCT_OFFSET (MonoLMF, r15), 8);
#endif
#ifdef TARGET_WIN32
amd64_mov_reg_membase (code, AMD64_RDI, AMD64_RCX, G_STRUCT_OFFSET (MonoLMF, rdi), 8);
amd64_mov_reg_membase (code, AMD64_RSI, AMD64_RCX, G_STRUCT_OFFSET (MonoLMF, rsi), 8);
#endif
amd64_mov_reg_membase (code, AMD64_RSP, AMD64_RCX, G_STRUCT_OFFSET (MonoLMF, rsp), 8);
/* 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);*/
/* state is already in rax */
amd64_jump_membase (code, cont_reg, G_STRUCT_OFFSET (MonoContinuation, return_ip));
g_assert ((code - start) <= kMaxCodeSize);
nacl_global_codeman_validate(&start, kMaxCodeSize, &code);
saved = start;
return (MonoContinuationRestore)saved;
}
MonoContinuationRestore
mono_tasklets_arch_restore (void)
{
static guint8* saved = NULL;
guint8 *code, *start;
int cont_reg = AMD64_R9; /* register usable on both call conventions */
const guint kMaxCodeSize = 64;
if (saved)
return (MonoContinuationRestore)saved;
code = start = (guint8 *)mono_global_codeman_reserve (kMaxCodeSize);
/* the signature is: restore (MonoContinuation *cont, int state, MonoLMF **lmf_addr) */
/* cont is in AMD64_ARG_REG1 ($rcx or $rdi)
* state is in AMD64_ARG_REG2 ($rdx or $rsi)
* lmf_addr is in AMD64_ARG_REG3 ($r8 or $rdx)
* We move cont to cont_reg since we need both rcx and rdi for the copy
* state is moved to $rax so it's setup as the return value and we can overwrite $rsi
*/
amd64_mov_reg_reg (code, cont_reg, MONO_AMD64_ARG_REG1, 8);
amd64_mov_reg_reg (code, AMD64_RAX, MONO_AMD64_ARG_REG2, 8);
/* setup the copy of the stack */
amd64_mov_reg_membase (code, AMD64_RCX, cont_reg, MONO_STRUCT_OFFSET (MonoContinuation, stack_used_size), sizeof (int));
amd64_shift_reg_imm (code, X86_SHR, AMD64_RCX, 3);
x86_cld (code);
amd64_mov_reg_membase (code, AMD64_RSI, cont_reg, MONO_STRUCT_OFFSET (MonoContinuation, saved_stack), sizeof (gpointer));
amd64_mov_reg_membase (code, AMD64_RDI, cont_reg, MONO_STRUCT_OFFSET (MonoContinuation, return_sp), sizeof (gpointer));
amd64_prefix (code, X86_REP_PREFIX);
amd64_movsl (code);
/* now restore the registers from the LMF */
amd64_mov_reg_membase (code, AMD64_RCX, cont_reg, MONO_STRUCT_OFFSET (MonoContinuation, lmf), 8);
amd64_mov_reg_membase (code, AMD64_RBP, AMD64_RCX, MONO_STRUCT_OFFSET (MonoLMF, rbp), 8);
amd64_mov_reg_membase (code, AMD64_RSP, AMD64_RCX, MONO_STRUCT_OFFSET (MonoLMF, rsp), 8);
#ifdef WIN32
amd64_mov_reg_reg (code, AMD64_R14, AMD64_ARG_REG3, 8);
#else
amd64_mov_reg_reg (code, AMD64_R12, AMD64_ARG_REG3, 8);
#endif
/* state is already in rax */
amd64_jump_membase (code, cont_reg, MONO_STRUCT_OFFSET (MonoContinuation, return_ip));
g_assert ((code - start) <= kMaxCodeSize);
mono_arch_flush_icache (start, code - start);
mono_profiler_code_buffer_new (start, code - start, MONO_PROFILER_CODE_BUFFER_EXCEPTION_HANDLING, NULL);
saved = start;
return (MonoContinuationRestore)saved;
}
