98 lines
1.8 KiB
ArmAsm
98 lines
1.8 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0+ */
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#include <linux/linkage.h>
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#include <asm/stackframe.h>
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.text
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.macro save_all_base_regs
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cfi_st ra, PT_R1
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cfi_st tp, PT_R2
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cfi_st a0, PT_R4
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cfi_st a1, PT_R5
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cfi_st a2, PT_R6
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cfi_st a3, PT_R7
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cfi_st a4, PT_R8
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cfi_st a5, PT_R9
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cfi_st a6, PT_R10
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cfi_st a7, PT_R11
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cfi_st t0, PT_R12
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cfi_st t1, PT_R13
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cfi_st t2, PT_R14
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cfi_st t3, PT_R15
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cfi_st t4, PT_R16
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cfi_st t5, PT_R17
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cfi_st t6, PT_R18
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cfi_st t7, PT_R19
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cfi_st t8, PT_R20
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cfi_st u0, PT_R21
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cfi_st fp, PT_R22
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cfi_st s0, PT_R23
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cfi_st s1, PT_R24
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cfi_st s2, PT_R25
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cfi_st s3, PT_R26
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cfi_st s4, PT_R27
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cfi_st s5, PT_R28
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cfi_st s6, PT_R29
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cfi_st s7, PT_R30
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cfi_st s8, PT_R31
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csrrd t0, LOONGARCH_CSR_CRMD
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andi t0, t0, 0x7 /* extract bit[1:0] PLV, bit[2] IE */
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LONG_S t0, sp, PT_CRMD
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.endm
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.macro restore_all_base_regs
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cfi_ld tp, PT_R2
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cfi_ld a0, PT_R4
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cfi_ld a1, PT_R5
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cfi_ld a2, PT_R6
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cfi_ld a3, PT_R7
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cfi_ld a4, PT_R8
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cfi_ld a5, PT_R9
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cfi_ld a6, PT_R10
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cfi_ld a7, PT_R11
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cfi_ld t0, PT_R12
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cfi_ld t1, PT_R13
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cfi_ld t2, PT_R14
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cfi_ld t3, PT_R15
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cfi_ld t4, PT_R16
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cfi_ld t5, PT_R17
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cfi_ld t6, PT_R18
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cfi_ld t7, PT_R19
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cfi_ld t8, PT_R20
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cfi_ld u0, PT_R21
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cfi_ld fp, PT_R22
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cfi_ld s0, PT_R23
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cfi_ld s1, PT_R24
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cfi_ld s2, PT_R25
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cfi_ld s3, PT_R26
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cfi_ld s4, PT_R27
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cfi_ld s5, PT_R28
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cfi_ld s6, PT_R29
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cfi_ld s7, PT_R30
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cfi_ld s8, PT_R31
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LONG_L t0, sp, PT_CRMD
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li.d t1, 0x7 /* mask bit[1:0] PLV, bit[2] IE */
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csrxchg t0, t1, LOONGARCH_CSR_CRMD
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.endm
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SYM_CODE_START(arch_rethook_trampoline)
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UNWIND_HINT_UNDEFINED
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addi.d sp, sp, -PT_SIZE
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save_all_base_regs
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addi.d t0, sp, PT_SIZE
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LONG_S t0, sp, PT_R3
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move a0, sp /* pt_regs */
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bl arch_rethook_trampoline_callback
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/* use the result as the return-address */
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move ra, a0
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restore_all_base_regs
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addi.d sp, sp, PT_SIZE
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jr ra
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SYM_CODE_END(arch_rethook_trampoline)
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