stackframe.h
来自「this SRC packet is the headfiles that MI」· C头文件 代码 · 共 291 行
H
291 行
/* * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * Copyright (C) 1994, 1995, 1996, 2001 Ralf Baechle * Copyright (C) 1994, 1995, 1996 Paul M. Antoine. */#ifndef __ASM_STACKFRAME_H#define __ASM_STACKFRAME_H#include <asm/addrspace.h>#include <asm/mipsregs.h>#include <asm/processor.h>#include <asm/asm.h>#include <asm/offset.h>#include <linux/config.h>#define SAVE_AT \ .set push; \ .set noat; \ sw $1, PT_R1(sp); \ .set pop#define SAVE_TEMP \ mfhi v1; \ sw $8, PT_R8(sp); \ sw $9, PT_R9(sp); \ sw v1, PT_HI(sp); \ mflo v1; \ sw $10,PT_R10(sp); \ sw $11, PT_R11(sp); \ sw v1, PT_LO(sp); \ sw $12, PT_R12(sp); \ sw $13, PT_R13(sp); \ sw $14, PT_R14(sp); \ sw $15, PT_R15(sp); \ sw $24, PT_R24(sp)#define SAVE_STATIC \ sw $16, PT_R16(sp); \ sw $17, PT_R17(sp); \ sw $18, PT_R18(sp); \ sw $19, PT_R19(sp); \ sw $20, PT_R20(sp); \ sw $21, PT_R21(sp); \ sw $22, PT_R22(sp); \ sw $23, PT_R23(sp); \ sw $30, PT_R30(sp)#define __str2(x) #x#define __str(x) __str2(x)#define save_static_function(symbol) \__asm__ ( \ ".globl\t" #symbol "\n\t" \ ".align\t2\n\t" \ ".type\t" #symbol ", @function\n\t" \ ".ent\t" #symbol ", 0\n" \ #symbol":\n\t" \ ".frame\t$29, 0, $31\n\t" \ "sw\t$16,"__str(PT_R16)"($29)\t\t\t# save_static_function\n\t" \ "sw\t$17,"__str(PT_R17)"($29)\n\t" \ "sw\t$18,"__str(PT_R18)"($29)\n\t" \ "sw\t$19,"__str(PT_R19)"($29)\n\t" \ "sw\t$20,"__str(PT_R20)"($29)\n\t" \ "sw\t$21,"__str(PT_R21)"($29)\n\t" \ "sw\t$22,"__str(PT_R22)"($29)\n\t" \ "sw\t$23,"__str(PT_R23)"($29)\n\t" \ "sw\t$30,"__str(PT_R30)"($29)\n\t" \ ".end\t" #symbol "\n\t" \ ".size\t" #symbol",. - " #symbol)/* Used in declaration of save_static functions. */#define static_unused static __attribute__((unused))#ifdef CONFIG_SMP# define GET_SAVED_SP \ mfc0 k0, CP0_CONTEXT; \ lui k1, %hi(kernelsp); \ srl k0, k0, 23; \ sll k0, k0, 2; \ addu k1, k0; \ lw k1, %lo(kernelsp)(k1); #else# define GET_SAVED_SP \ lui k1, %hi(kernelsp); \ lw k1, %lo(kernelsp)(k1); #endif #define SAVE_SOME \ .set push; \ .set reorder; \ mfc0 k0, CP0_STATUS; \ sll k0, 3; /* extract cu0 bit */ \ .set noreorder; \ bltz k0, 8f; \ move k1, sp; \ .set reorder; \ /* Called from user mode, new stack. */ \ GET_SAVED_SP \8: \ move k0, sp; \ subu sp, k1, PT_SIZE; \ sw k0, PT_R29(sp); \ sw $3, PT_R3(sp); \ sw $0, PT_R0(sp); \ mfc0 v1, CP0_STATUS; \ sw $2, PT_R2(sp); \ sw v1, PT_STATUS(sp); \ sw $4, PT_R4(sp); \ mfc0 v1, CP0_CAUSE; \ sw $5, PT_R5(sp); \ sw v1, PT_CAUSE(sp); \ sw $6, PT_R6(sp); \ mfc0 v1, CP0_EPC; \ sw $7, PT_R7(sp); \ sw v1, PT_EPC(sp); \ sw $25, PT_R25(sp); \ sw $28, PT_R28(sp); \ sw $31, PT_R31(sp); \ ori $28, sp, 0x1fff; \ xori $28, 0x1fff; \ .set pop#define SAVE_ALL \ SAVE_SOME; \ SAVE_AT; \ SAVE_TEMP; \ SAVE_STATIC#define RESTORE_AT \ .set push; \ .set noat; \ lw $1, PT_R1(sp); \ .set pop;#define RESTORE_TEMP \ lw $24, PT_LO(sp); \ lw $8, PT_R8(sp); \ lw $9, PT_R9(sp); \ mtlo $24; \ lw $24, PT_HI(sp); \ lw $10,PT_R10(sp); \ lw $11, PT_R11(sp); \ mthi $24; \ lw $12, PT_R12(sp); \ lw $13, PT_R13(sp); \ lw $14, PT_R14(sp); \ lw $15, PT_R15(sp); \ lw $24, PT_R24(sp)#define RESTORE_STATIC \ lw $16, PT_R16(sp); \ lw $17, PT_R17(sp); \ lw $18, PT_R18(sp); \ lw $19, PT_R19(sp); \ lw $20, PT_R20(sp); \ lw $21, PT_R21(sp); \ lw $22, PT_R22(sp); \ lw $23, PT_R23(sp); \ lw $30, PT_R30(sp)#if defined(CONFIG_CPU_R3000)#define RESTORE_SOME \ .set push; \ .set reorder; \ mfc0 t0, CP0_STATUS; \ .set pop; \ ori t0, 0x1f; \ xori t0, 0x1f; \ mtc0 t0, CP0_STATUS; \ li v1, 0xff00; \ and t0, v1; \ lw v0, PT_STATUS(sp); \ nor v1, $0, v1; \ and v0, v1; \ or v0, t0; \ mtc0 v0, CP0_STATUS; \ lw $31, PT_R31(sp); \ lw $28, PT_R28(sp); \ lw $25, PT_R25(sp); \ lw $7, PT_R7(sp); \ lw $6, PT_R6(sp); \ lw $5, PT_R5(sp); \ lw $4, PT_R4(sp); \ lw $3, PT_R3(sp); \ lw $2, PT_R2(sp)#define RESTORE_SP_AND_RET \ .set push; \ .set noreorder; \ lw k0, PT_EPC(sp); \ lw sp, PT_R29(sp); \ jr k0; \ rfe; \ .set pop#else#define RESTORE_SOME \ .set push; \ .set reorder; \ mfc0 t0, CP0_STATUS; \ .set pop; \ ori t0, 0x1f; \ xori t0, 0x1f; \ mtc0 t0, CP0_STATUS; \ li v1, 0xff00; \ and t0, v1; \ lw v0, PT_STATUS(sp); \ nor v1, $0, v1; \ and v0, v1; \ or v0, t0; \ mtc0 v0, CP0_STATUS; \ lw v1, PT_EPC(sp); \ mtc0 v1, CP0_EPC; \ lw $31, PT_R31(sp); \ lw $28, PT_R28(sp); \ lw $25, PT_R25(sp); \ lw $7, PT_R7(sp); \ lw $6, PT_R6(sp); \ lw $5, PT_R5(sp); \ lw $4, PT_R4(sp); \ lw $3, PT_R3(sp); \ lw $2, PT_R2(sp)#define RESTORE_SP_AND_RET \ lw sp, PT_R29(sp); \ .set mips3; \ eret; \ .set mips0#endif#define RESTORE_SP \ lw sp, PT_R29(sp); \#define RESTORE_ALL \ RESTORE_SOME; \ RESTORE_AT; \ RESTORE_TEMP; \ RESTORE_STATIC; \ RESTORE_SP#define RESTORE_ALL_AND_RET \ RESTORE_SOME; \ RESTORE_AT; \ RESTORE_TEMP; \ RESTORE_STATIC; \ RESTORE_SP_AND_RET/* * Move to kernel mode and disable interrupts. * Set cp0 enable bit as sign that we're running on the kernel stack */#define CLI \ mfc0 t0,CP0_STATUS; \ li t1,ST0_CU0|0x1f; \ or t0,t1; \ xori t0,0x1f; \ mtc0 t0,CP0_STATUS/* * Move to kernel mode and enable interrupts. * Set cp0 enable bit as sign that we're running on the kernel stack */#define STI \ mfc0 t0,CP0_STATUS; \ li t1,ST0_CU0|0x1f; \ or t0,t1; \ xori t0,0x1e; \ mtc0 t0,CP0_STATUS/* * Just move to kernel mode and leave interrupts as they are. * Set cp0 enable bit as sign that we're running on the kernel stack */#define KMODE \ mfc0 t0,CP0_STATUS; \ li t1,ST0_CU0|0x1e; \ or t0,t1; \ xori t0,0x1e; \ mtc0 t0,CP0_STATUS#endif /* __ASM_STACKFRAME_H */⌨️ 快捷键说明
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