// Copyright (c) Huawei Technologies Co., Ltd. 2025. All rights reserved.
// This source file is part of the Cangjie project, licensed under Apache-2.0
// with Runtime Library Exception.
//
// See https://cangjie-lang.cn/pages/LICENSE for license information.
// The Cangjie API is in Beta. For details on its capabilities and limitations, please refer to the README file.
#define cfi_adjust_cfa_offset(off) .cfi_adjust_cfa_offset off
#define cfi_rel_offset(reg, off) .cfi_rel_offset reg, off
#define cfi_restore(reg) .cfi_restore reg
#define cfi_def_cfa_register(reg) .cfi_def_cfa_register reg
#define SignalStubFrameSize (0x310)
// This signal handler stub relies on MRT_PrepareToHandleSignal to put continuation pc in x17.
// Continuation pc describes the control flow after signal handling completes.
.text
.align 2
.global CJ_MCC_StackGrowStub
.type CJ_MCC_StackGrowStub, %function
CJ_MCC_StackGrowStub:
.cfi_startproc
.cfi_return_column x30
sub sp, sp, # SignalStubFrameSize
cfi_adjust_cfa_offset (SignalStubFrameSize)
stp x29, x30, [sp]
cfi_rel_offset (x29, 0)
cfi_rel_offset (x30, 8)
mov x29, sp
cfi_def_cfa_register (x29)
// save all non callee-saved registers which may be contaminated by calling
// the real signal handler.
stp x0, x1, [sp, #0x10]
cfi_rel_offset (x0, 0x10)
cfi_rel_offset (x1, 0x18)
stp x2, x3, [sp, #0x20]
cfi_rel_offset (x2, 0x20)
cfi_rel_offset (x3, 0x28)
stp x4, x5, [sp, #0x30]
cfi_rel_offset (x4, 0x30)
cfi_rel_offset (x5, 0x38)
stp x6, x7, [sp, #0x40]
cfi_rel_offset (x6, 0x40)
cfi_rel_offset (x7, 0x48)
stp x8, x9, [sp, #0x50]
cfi_rel_offset (x8, 0x50)
cfi_rel_offset (x9, 0x58)
stp x10, x11, [sp, #0x60]
cfi_rel_offset (x10, 0x60)
cfi_rel_offset (x11, 0x68)
stp x12, x13, [sp, #0x70]
cfi_rel_offset (x12, 0x70)
cfi_rel_offset (x13, 0x78)
stp x14, x15, [sp, #0x80]
cfi_rel_offset (x14, 0x80)
cfi_rel_offset (x15, 0x88)
stp x16, x17, [sp, #0x90]
cfi_rel_offset (x16, 0x90)
cfi_rel_offset (x17, 0x98)
stp x18, x19, [sp, #0xa0]
cfi_rel_offset (x18, 0xa0)
cfi_rel_offset (x19, 0xa8)
stp x20, x21, [sp, 0xb0]
cfi_rel_offset (x20, 0xb0)
cfi_rel_offset (x21, 0xb8)
stp x22, x23, [sp, 0xc0]
cfi_rel_offset (x22, 0xc0)
cfi_rel_offset (x23, 0xc8)
stp x24, x25, [sp, 0xd0]
cfi_rel_offset (x24, 0xd0)
cfi_rel_offset (x25, 0xd8)
stp x26, x27, [sp, 0xe0]
cfi_rel_offset (x26, 0xe0)
cfi_rel_offset (x27, 0xe8)
stp x28, x29, [sp, 0xf0]
cfi_rel_offset (x28, 0xf0)
cfi_rel_offset (x29, 0xf8)
mrs x30, nzcv
str x30, [sp, 0x100]
stp q0, q1, [sp, #0x110]
stp q2, q3, [sp, #0x130]
stp q4, q5, [sp, #0x150]
stp q6, q7, [sp, #0x170]
stp q8, q9, [sp, #0x190]
stp q10, q11, [sp, #0x1b0]
stp q12, q13, [sp, #0x1d0]
stp q14, q15, [sp, #0x1f0]
stp q16, q17, [sp, #0x210]
stp q18, q19, [sp, #0x230]
stp q20, q21, [sp, #0x250]
stp q22, q23, [sp, #0x270]
stp q24, q25, [sp, #0x290]
stp q26, q27, [sp, #0x2b0]
stp q28, q29, [sp, #0x2d0]
stp q30, q31, [sp, #0x2f0]
mov x1, x29
mov x2, #1
adr x0, #32 // x0 is addr of unwindPCForSignalHandlerStub
mov x3, x28
bl MRT_UpdateUwContext
mov x0, x29
ldr x1, [sp]
ldur x1, [sp, #0x58] // get adjustedSize
ldr x2, [sp, #0x8]
bl MRT_StackGrow
.global unwindPCForStackGrowStub
unwindPCForStackGrowStub:
add x29, x29, x0
add sp, sp, x0
bl MRT_FreeOldStack
bl MRT_GetThreadLocalData
str x0, [sp, #0xf0]
bl MRT_DeleteC2NContext
.L_noexception:
ldp q0, q1, [sp, #0x110]
ldp q2, q3, [sp, #0x130]
ldp q4, q5, [sp, #0x150]
ldp q6, q7, [sp, #0x170]
ldp q8, q9, [sp, #0x190]
ldp q10, q11, [sp, #0x1b0]
ldp q12, q13, [sp, #0x1d0]
ldp q14, q15, [sp, #0x1f0]
ldp q16, q17, [sp, #0x210]
ldp q18, q19, [sp, #0x230]
ldp q20, q21, [sp, #0x250]
ldp q22, q23, [sp, #0x270]
ldp q24, q25, [sp, #0x290]
ldp q26, q27, [sp, #0x2b0]
ldp q28, q29, [sp, #0x2d0]
ldp q30, q31, [sp, #0x2f0]
ldp x0, x1, [sp, #0x10]
cfi_restore (x0)
cfi_restore (x1)
ldp x2, x3, [sp, #0x20]
cfi_restore (x2)
cfi_restore (x3)
ldp x4, x5, [sp, #0x30]
cfi_restore (x4)
cfi_restore (x5)
ldp x6, x7, [sp, #0x40]
cfi_restore (x6)
cfi_restore (x7)
ldp x8, x9, [sp, #0x50]
cfi_restore (x8)
cfi_restore (x9)
ldp x10, x11, [sp, #0x60]
cfi_restore (x10)
cfi_restore (x11)
ldp x12, x13, [sp, #0x70]
cfi_restore (x12)
cfi_restore (x13)
ldp x14, x15, [sp, #0x80]
cfi_restore (x14)
cfi_restore (x15)
ldp x16, x17, [sp, #0x90]
cfi_restore (x16)
cfi_restore (x30)
ldp x18, x19, [sp, #0xa0]
cfi_restore (x18)
cfi_restore (x19)
ldp x20, x21, [sp, #0xb0]
cfi_restore (x20)
cfi_restore (x21)
ldp x22, x23, [sp, #0xc0]
cfi_restore (x22)
cfi_restore (x23)
ldp x24, x25, [sp, #0xd0]
cfi_restore (x24)
cfi_restore (x25)
ldp x26, x27, [sp, #0xe0]
cfi_restore (x26)
cfi_restore (x27)
ldp x28, x29, [sp, #0xf0]
cfi_restore (x28)
cfi_restore (x29)
ldr x30, [sp, #0x100]
msr nzcv, x30
ldp x29, x30, [sp]
cfi_restore (x29)
cfi_restore (x30)
add sp, sp, # SignalStubFrameSize
cfi_adjust_cfa_offset (-SignalStubFrameSize)
ret
.cfi_endproc
.size CJ_MCC_StackGrowStub, .-CJ_MCC_StackGrowStub
