/* SPDX-License-Identifier: GPL-2.0 *//* * Copyright (C) 2020-2022 Loongson Technology Corporation Limited * * Derived from MIPS: * Copyright (C) 1994 - 2000, 2001, 2003 Ralf Baechle * Copyright (C) 1999, 2000 Silicon Graphics, Inc. * Copyright (C) 2001 MIPS Technologies, Inc. */ #include <asm/asm.h>#include <asm/asmmacro.h>#include <asm/loongarch.h>#include <asm/regdef.h>#include <asm/stackframe.h>#include <asm/thread_info.h>#include <asm/unwind_hints.h> 	.text	.cfi_sections	.debug_frame	.align	5SYM_CODE_START(handle_syscall)	UNWIND_HINT_UNDEFINED	csrrd		t0, PERCPU_BASE_KS	la.pcrel	t1, kernelsp	PTR_ADD		t1, t1, t0	move		t2, sp	PTR_L		sp, t1, 0 	PTR_ADDI	sp, sp, -PT_SIZE	cfi_st		t2, PT_R3	cfi_rel_offset	sp, PT_R3	LONG_S		zero, sp, PT_R0	csrrd		t2, LOONGARCH_CSR_PRMD	LONG_S		t2, sp, PT_PRMD	csrrd		t2, LOONGARCH_CSR_CRMD	LONG_S		t2, sp, PT_CRMD	csrrd		t2, LOONGARCH_CSR_EUEN	LONG_S		t2, sp, PT_EUEN	csrrd		t2, LOONGARCH_CSR_ECFG	LONG_S		t2, sp, PT_ECFG	csrrd		t2, LOONGARCH_CSR_ESTAT	LONG_S		t2, sp, PT_ESTAT	cfi_st		ra, PT_R1	cfi_st		a0, PT_R4	cfi_st		a1, PT_R5	cfi_st		a2, PT_R6	cfi_st		a3, PT_R7	cfi_st		a4, PT_R8	cfi_st		a5, PT_R9	cfi_st		a6, PT_R10	cfi_st		a7, PT_R11	csrrd		ra, LOONGARCH_CSR_ERA	LONG_S		ra, sp, PT_ERA	cfi_rel_offset	ra, PT_ERA 	cfi_st		tp, PT_R2	cfi_st		u0, PT_R21	cfi_st		fp, PT_R22 	SAVE_STATIC	UNWIND_HINT_REGS #ifdef CONFIG_KGDB	li.w		t1, CSR_CRMD_WE	csrxchg		t1, t1, LOONGARCH_CSR_CRMD#endif 	move		u0, t0	la_abs		t1, cpu_tasks#ifdef CONFIG_SMP	LONG_ADD	t1, t1, u0#endif	LONG_L		tp, t1, 0 	move		a0, sp	bl		do_syscall 	STACKLEAK_ERASE	RESTORE_ALL_AND_RETSYM_CODE_END(handle_syscall)_ASM_NOKPROBE(handle_syscall) SYM_CODE_START(ret_from_fork_asm)	UNWIND_HINT_REGS	move		a1, sp	bl 		ret_from_fork	STACKLEAK_ERASE	RESTORE_STATIC	RESTORE_SOME	RESTORE_SP_AND_RETSYM_CODE_END(ret_from_fork_asm) SYM_CODE_START(ret_from_kernel_thread_asm)	UNWIND_HINT_REGS	move		a1, sp	move		a2, s0	move		a3, s1	bl		ret_from_kernel_thread	STACKLEAK_ERASE	RESTORE_STATIC	RESTORE_SOME	RESTORE_SP_AND_RETSYM_CODE_END(ret_from_kernel_thread_asm)