| /* |
| * Copyright (C) 2013 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef ART_RUNTIME_ARCH_X86_ASM_SUPPORT_X86_S_ |
| #define ART_RUNTIME_ARCH_X86_ASM_SUPPORT_X86_S_ |
| |
| #include "asm_support_x86.h" |
| |
| #if defined(__APPLE__) || (defined(__clang__) && (__clang_major__ < 4) && (__clang_minor__ < 5)) |
| // Clang's as(1) doesn't let you name macro parameters prior to 3.5. |
| #define MACRO0(macro_name) .macro macro_name |
| #define MACRO1(macro_name, macro_arg1) .macro macro_name |
| #define MACRO2(macro_name, macro_arg1, macro_args2) .macro macro_name |
| #define MACRO3(macro_name, macro_arg1, macro_args2, macro_args3) .macro macro_name |
| #define END_MACRO .endmacro |
| |
| // Clang's as(1) uses $0, $1, and so on for macro arguments. |
| #define RAW_VAR(name,index) $index |
| #define VAR(name,index) SYMBOL($index) |
| #define PLT_VAR(name, index) SYMBOL($index) |
| #define REG_VAR(name,index) %$index |
| #define CALL_MACRO(name,index) $index |
| |
| // The use of $x for arguments mean that literals need to be represented with $$x in macros. |
| #define LITERAL(value) $value |
| #define MACRO_LITERAL(value) $$value |
| #else |
| // Regular gas(1) lets you name macro parameters. |
| #define MACRO0(macro_name) .macro macro_name |
| #define MACRO1(macro_name, macro_arg1) .macro macro_name macro_arg1 |
| #define MACRO2(macro_name, macro_arg1, macro_arg2) .macro macro_name macro_arg1, macro_arg2 |
| #define MACRO3(macro_name, macro_arg1, macro_arg2, macro_arg3) .macro macro_name macro_arg1, macro_arg2, macro_arg3 |
| #define END_MACRO .endm |
| |
| // Regular gas(1) uses \argument_name for macro arguments. |
| // We need to turn on alternate macro syntax so we can use & instead or the preprocessor |
| // will screw us by inserting a space between the \ and the name. Even in this mode there's |
| // no special meaning to $, so literals are still just $x. The use of altmacro means % is a |
| // special character meaning care needs to be taken when passing registers as macro arguments. |
| .altmacro |
| #define RAW_VAR(name,index) name& |
| #define VAR(name,index) name& |
| #define PLT_VAR(name, index) name&@PLT |
| #define REG_VAR(name,index) %name |
| #define CALL_MACRO(name,index) name& |
| |
| #define LITERAL(value) $value |
| #define MACRO_LITERAL(value) $value |
| #endif |
| |
| #if defined(__APPLE__) |
| #define FUNCTION_TYPE(name,index) |
| #define SIZE(name,index) |
| #elif defined(__clang__) && (__clang_major__ < 4) && (__clang_minor__ < 5) |
| #define FUNCTION_TYPE(name,index) .type $index, @function |
| #define SIZE(name,index) .size $index, .-$index |
| #else |
| #define FUNCTION_TYPE(name,index) .type name&, @function |
| #define SIZE(name,index) .size name, .-name |
| #endif |
| |
| // CFI support. |
| #if !defined(__APPLE__) |
| #define CFI_STARTPROC .cfi_startproc |
| #define CFI_ENDPROC .cfi_endproc |
| #define CFI_ADJUST_CFA_OFFSET(size) .cfi_adjust_cfa_offset size |
| #define CFI_DEF_CFA(reg,size) .cfi_def_cfa reg,size |
| #define CFI_DEF_CFA_REGISTER(reg) .cfi_def_cfa_register reg |
| #define CFI_RESTORE(reg) .cfi_restore reg |
| #define CFI_REL_OFFSET(reg,size) .cfi_rel_offset reg,size |
| #define CFI_RESTORE_STATE .cfi_restore_state |
| #define CFI_REMEMBER_STATE .cfi_remember_state |
| #else |
| // Mac OS' doesn't like cfi_* directives. |
| #define CFI_STARTPROC |
| #define CFI_ENDPROC |
| #define CFI_ADJUST_CFA_OFFSET(size) |
| #define CFI_DEF_CFA(reg,size) |
| #define CFI_DEF_CFA_REGISTER(reg) |
| #define CFI_RESTORE(reg) |
| #define CFI_REL_OFFSET(reg,size) |
| #define CFI_RESTORE_STATE |
| #define CFI_REMEMBER_STATE |
| #endif |
| |
| // Symbols. |
| #if !defined(__APPLE__) |
| #define SYMBOL(name) name |
| #if defined(__clang__) && (__clang_major__ < 4) && (__clang_minor__ < 5) |
| // TODO: Disabled for old clang 3.3, this leads to text relocations and there should be a |
| // better fix. |
| #define PLT_SYMBOL(name) name // ## @PLT |
| #else |
| #define PLT_SYMBOL(name) name ## @PLT |
| #endif |
| #else |
| // Mac OS' symbols have an _ prefix. |
| #define SYMBOL(name) _ ## name |
| #define PLT_SYMBOL(name) _ ## name |
| #endif |
| |
| // Directive to hide a function symbol. |
| #if defined(__APPLE__) |
| #define ASM_HIDDEN .private_extern |
| #else |
| #define ASM_HIDDEN .hidden |
| #endif |
| |
| /* Cache alignment for function entry */ |
| MACRO0(ALIGN_FUNCTION_ENTRY) |
| .balign 16 |
| END_MACRO |
| |
| MACRO1(DEFINE_FUNCTION, c_name) |
| FUNCTION_TYPE(\c_name, 0) |
| ASM_HIDDEN VAR(c_name, 0) |
| .globl VAR(c_name, 0) |
| ALIGN_FUNCTION_ENTRY |
| VAR(c_name, 0): |
| CFI_STARTPROC |
| // Ensure we get a sane starting CFA. |
| CFI_DEF_CFA(esp, 4) |
| END_MACRO |
| |
| MACRO1(END_FUNCTION, c_name) |
| CFI_ENDPROC |
| SIZE(\c_name, 0) |
| END_MACRO |
| |
| MACRO1(PUSH, reg) |
| pushl REG_VAR(reg, 0) |
| CFI_ADJUST_CFA_OFFSET(4) |
| CFI_REL_OFFSET(REG_VAR(reg, 0), 0) |
| END_MACRO |
| |
| MACRO1(POP, reg) |
| popl REG_VAR(reg,0) |
| CFI_ADJUST_CFA_OFFSET(-4) |
| CFI_RESTORE(REG_VAR(reg,0)) |
| END_MACRO |
| |
| MACRO1(UNIMPLEMENTED,name) |
| FUNCTION_TYPE(\name, 0) |
| .globl VAR(name, 0) |
| ALIGN_FUNCTION_ENTRY |
| VAR(name, 0): |
| CFI_STARTPROC |
| int3 |
| int3 |
| CFI_ENDPROC |
| SIZE(\name, 0) |
| END_MACRO |
| |
| MACRO0(SETUP_GOT_NOSAVE) |
| #ifndef __APPLE__ |
| call __x86.get_pc_thunk.bx |
| addl $_GLOBAL_OFFSET_TABLE_, %ebx |
| #endif |
| END_MACRO |
| |
| #endif // ART_RUNTIME_ARCH_X86_ASM_SUPPORT_X86_S_ |