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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277/* SPDX-License-Identifier: GPL-2.0 *//* * Copyright (C) 2020-2022 Loongson Technology Corporation Limited */#ifndef _ASM_STACKFRAME_H#define _ASM_STACKFRAME_H
#include <linux/threads.h>
#include <asm/addrspace.h>#include <asm/asm.h>#include <asm/asmmacro.h>#include <asm/asm-offsets.h>#include <asm/loongarch.h>#include <asm/thread_info.h>#include <asm/unwind_hints.h>
/* Make the addition of cfi info a little easier. */ .macro cfi_rel_offset reg offset=0 docfi=0 .if \docfi .cfi_rel_offset \reg, \offset .endif .endm
.macro cfi_st reg offset=0 docfi=0 cfi_rel_offset \reg, \offset, \docfi LONG_S \reg, sp, \offset .endm
.macro cfi_restore reg offset=0 docfi=0 .if \docfi .cfi_restore \reg .endif .endm
.macro cfi_ld reg offset=0 docfi=0 LONG_L \reg, sp, \offset cfi_restore \reg \offset \docfi .endm
.macro SETUP_TWINS temp pcaddi t0, 0 PTR_LI t1, ~TO_PHYS_MASK and t0, t0, t1 ori t0, t0, (1 << 4 | 1) csrwr t0, LOONGARCH_CSR_DMWIN0 PTR_LI t0, CSR_DMW1_INIT csrwr t0, LOONGARCH_CSR_DMWIN1 .endm
.macro SETUP_MODES temp /* Enable PG */ li.w \temp, 0xb0 # PLV=0, IE=0, PG=1 csrwr \temp, LOONGARCH_CSR_CRMD li.w \temp, 0x04 # PLV=0, PIE=1, PWE=0 csrwr \temp, LOONGARCH_CSR_PRMD li.w \temp, 0x00 # FPE=0, SXE=0, ASXE=0, BTE=0 csrwr \temp, LOONGARCH_CSR_EUEN .endm
.macro SETUP_DMWINS temp PTR_LI \temp, CSR_DMW0_INIT # SUC, PLV0, LA32: 0x8xxx xxxx, LA64: 0x8000 xxxx xxxx xxxx csrwr \temp, LOONGARCH_CSR_DMWIN0 PTR_LI \temp, CSR_DMW1_INIT # CAC, PLV0, LA32: 0xaxxx xxxx, LA64: 0x9000 xxxx xxxx xxxx csrwr \temp, LOONGARCH_CSR_DMWIN1 PTR_LI \temp, CSR_DMW2_INIT # WUC, PLV0, LA32: unavailable, LA64: 0xa000 xxxx xxxx xxxx csrwr \temp, LOONGARCH_CSR_DMWIN2 PTR_LI \temp, CSR_DMW3_INIT # 0x0, unused csrwr \temp, LOONGARCH_CSR_DMWIN3 .endm
/* Jump to the runtime virtual address. */ .macro JUMP_VIRT_ADDR temp1 temp2 PTR_LI \temp1, CACHE_BASE pcaddi \temp2, 0 PTR_BSTRINS \temp1, \temp2, (DMW_PABITS - 1), 0 jirl zero, \temp1, 0xc .endm
.macro STACKLEAK_ERASE#ifdef CONFIG_KSTACK_ERASE bl stackleak_erase_on_task_stack#endif .endm
.macro BACKUP_T0T1 csrwr t0, EXCEPTION_KS0 csrwr t1, EXCEPTION_KS1 .endm
.macro RELOAD_T0T1 csrrd t0, EXCEPTION_KS0 csrrd t1, EXCEPTION_KS1 .endm
.macro SAVE_TEMP docfi=0 RELOAD_T0T1 cfi_st t0, PT_R12, \docfi cfi_st t1, PT_R13, \docfi cfi_st t2, PT_R14, \docfi cfi_st t3, PT_R15, \docfi cfi_st t4, PT_R16, \docfi cfi_st t5, PT_R17, \docfi cfi_st t6, PT_R18, \docfi cfi_st t7, PT_R19, \docfi cfi_st t8, PT_R20, \docfi .endm
.macro SAVE_STATIC docfi=0 cfi_st s0, PT_R23, \docfi cfi_st s1, PT_R24, \docfi cfi_st s2, PT_R25, \docfi cfi_st s3, PT_R26, \docfi cfi_st s4, PT_R27, \docfi cfi_st s5, PT_R28, \docfi cfi_st s6, PT_R29, \docfi cfi_st s7, PT_R30, \docfi cfi_st s8, PT_R31, \docfi .endm
/* * get_saved_sp returns the SP for the current CPU by looking in the * kernelsp array for it. It stores the current sp in t0 and loads the * new value in sp. */ .macro get_saved_sp docfi=0 la_abs t1, kernelsp#ifdef CONFIG_SMP csrrd t0, PERCPU_BASE_KS LONG_ADD t1, t1, t0#endif move t0, sp .if \docfi .cfi_register sp, t0 .endif LONG_L sp, t1, 0 .endm
.macro set_saved_sp stackp temp temp2 la.pcrel \temp, kernelsp#ifdef CONFIG_SMP LONG_ADD \temp, \temp, u0#endif LONG_S \stackp, \temp, 0 .endm
.macro SAVE_SOME docfi=0 csrrd t1, LOONGARCH_CSR_PRMD andi t1, t1, 0x3 /* extract pplv bit */ move t0, sp beqz t1, 8f /* Called from user mode, new stack. */ get_saved_sp docfi=\docfi8: PTR_ADDI sp, sp, -PT_SIZE .if \docfi .cfi_def_cfa sp, 0 .endif cfi_st t0, PT_R3, \docfi cfi_rel_offset sp, PT_R3, \docfi LONG_S zero, sp, PT_R0 csrrd t0, LOONGARCH_CSR_PRMD LONG_S t0, sp, PT_PRMD csrrd t0, LOONGARCH_CSR_CRMD LONG_S t0, sp, PT_CRMD csrrd t0, LOONGARCH_CSR_EUEN LONG_S t0, sp, PT_EUEN csrrd t0, LOONGARCH_CSR_ECFG LONG_S t0, sp, PT_ECFG csrrd t0, LOONGARCH_CSR_ESTAT PTR_S t0, sp, PT_ESTAT cfi_st ra, PT_R1, \docfi cfi_st a0, PT_R4, \docfi cfi_st a1, PT_R5, \docfi cfi_st a2, PT_R6, \docfi cfi_st a3, PT_R7, \docfi cfi_st a4, PT_R8, \docfi cfi_st a5, PT_R9, \docfi cfi_st a6, PT_R10, \docfi cfi_st a7, PT_R11, \docfi csrrd ra, LOONGARCH_CSR_ERA LONG_S ra, sp, PT_ERA .if \docfi .cfi_rel_offset ra, PT_ERA .endif cfi_st tp, PT_R2, \docfi cfi_st u0, PT_R21, \docfi cfi_st fp, PT_R22, \docfi
/* Set thread_info if we're coming from user mode */ csrrd t0, LOONGARCH_CSR_PRMD andi t0, t0, 0x3 /* extract pplv bit */ beqz t0, 9f
csrrd u0, PERCPU_BASE_KS
la_abs t1, cpu_tasks#ifdef CONFIG_SMP LONG_ADD t1, t1, u0#endif LONG_L tp, t1, 09:#ifdef CONFIG_KGDB li.w t0, CSR_CRMD_WE csrxchg t0, t0, LOONGARCH_CSR_CRMD#endif UNWIND_HINT_REGS .endm
.macro SAVE_ALL docfi=0 SAVE_SOME \docfi SAVE_TEMP \docfi SAVE_STATIC \docfi .endm
.macro RESTORE_TEMP docfi=0 cfi_ld t0, PT_R12, \docfi cfi_ld t1, PT_R13, \docfi cfi_ld t2, PT_R14, \docfi cfi_ld t3, PT_R15, \docfi cfi_ld t4, PT_R16, \docfi cfi_ld t5, PT_R17, \docfi cfi_ld t6, PT_R18, \docfi cfi_ld t7, PT_R19, \docfi cfi_ld t8, PT_R20, \docfi .endm
.macro RESTORE_STATIC docfi=0 cfi_ld s0, PT_R23, \docfi cfi_ld s1, PT_R24, \docfi cfi_ld s2, PT_R25, \docfi cfi_ld s3, PT_R26, \docfi cfi_ld s4, PT_R27, \docfi cfi_ld s5, PT_R28, \docfi cfi_ld s6, PT_R29, \docfi cfi_ld s7, PT_R30, \docfi cfi_ld s8, PT_R31, \docfi .endm
.macro RESTORE_SOME docfi=0 LONG_L a0, sp, PT_PRMD andi a0, a0, 0x3 /* extract pplv bit */ beqz a0, 8f cfi_ld u0, PT_R21, \docfi8: LONG_L a0, sp, PT_ERA csrwr a0, LOONGARCH_CSR_ERA LONG_L a0, sp, PT_PRMD csrwr a0, LOONGARCH_CSR_PRMD cfi_ld ra, PT_R1, \docfi cfi_ld a0, PT_R4, \docfi cfi_ld a1, PT_R5, \docfi cfi_ld a2, PT_R6, \docfi cfi_ld a3, PT_R7, \docfi cfi_ld a4, PT_R8, \docfi cfi_ld a5, PT_R9, \docfi cfi_ld a6, PT_R10, \docfi cfi_ld a7, PT_R11, \docfi cfi_ld tp, PT_R2, \docfi cfi_ld fp, PT_R22, \docfi .endm
.macro RESTORE_SP_AND_RET docfi=0 cfi_ld sp, PT_R3, \docfi UNWIND_HINT_FUNC ertn .endm
.macro RESTORE_ALL_AND_RET docfi=0 RESTORE_STATIC \docfi RESTORE_TEMP \docfi RESTORE_SOME \docfi RESTORE_SP_AND_RET \docfi .endm
#endif /* _ASM_STACKFRAME_H */