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115 lines
2.7 KiB
ArmAsm
115 lines
2.7 KiB
ArmAsm
/* Cancellable syscall wrapper. Linux/csky version.
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Copyright (C) 2023-2025 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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#include <descr-const.h>
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/* long int __syscall_cancel_arch (int *cancelhandling,
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__syscall_arg_t nr,
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__syscall_arg_t arg1,
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__syscall_arg_t arg2,
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__syscall_arg_t arg3,
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__syscall_arg_t arg4,
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__syscall_arg_t arg5,
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__syscall_arg_t arg6) */
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#ifdef SHARED
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# define STACK_ADJ 4
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#else
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# define STACK_ADJ 0
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#endif
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ENTRY (__syscall_cancel_arch)
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subi sp, sp, 16 + STACK_ADJ
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cfi_def_cfa_offset (16 + STACK_ADJ)
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#ifdef SHARED
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st.w gb, (sp, 16)
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lrw t1, 1f@GOTPC
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cfi_offset (gb, -4)
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grs gb, 1f
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1:
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#endif
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st.w lr, (sp, 12)
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st.w l3, (sp, 8)
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st.w l1, (sp, 4)
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st.w l0, (sp, 0)
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#ifdef SHARED
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addu gb, gb, t1
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#endif
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subi sp, sp, 16
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cfi_def_cfa_offset (32 + STACK_ADJ)
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cfi_offset (lr, -( 4 + STACK_ADJ))
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cfi_offset (l3, -( 8 + STACK_ADJ))
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cfi_offset (l1, -(12 + STACK_ADJ))
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cfi_offset (l0, -(16 + STACK_ADJ))
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mov l3, a1
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mov a1, a3
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ld.w a3, (sp, 32 + STACK_ADJ)
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st.w a3, (sp, 0)
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ld.w a3, (sp, 36 + STACK_ADJ)
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st.w a3, (sp, 4)
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ld.w a3, (sp, 40 + STACK_ADJ)
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st.w a3, (sp, 8)
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ld.w a3, (sp, 44 + STACK_ADJ)
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st.w a3, (sp, 12)
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.globl __syscall_cancel_arch_start
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__syscall_cancel_arch_start:
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ld.w t0, (a0, 0)
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andi t0, t0, TCB_CANCELED_BITMASK
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jbnez t0, 2f
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mov a0, a2
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ld.w a3, (sp, 4)
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ld.w a2, (sp, 0)
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ld.w l0, (sp, 8)
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ld.w l1, (sp, 12)
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trap 0
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.globl __syscall_cancel_arch_end
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__syscall_cancel_arch_end:
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addi sp, sp, 16
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cfi_remember_state
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cfi_def_cfa_offset (16 + STACK_ADJ)
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#ifdef SHARED
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ld.w gb, (sp, 16)
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cfi_restore (gb)
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#endif
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ld.w lr, (sp, 12)
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cfi_restore (lr)
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ld.w l3, (sp, 8)
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cfi_restore (l3)
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ld.w l1, (sp, 4)
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cfi_restore (l1)
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ld.w l0, (sp, 0)
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cfi_restore (l0)
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addi sp, sp, 16
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cfi_def_cfa_offset (0)
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rts
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2:
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cfi_restore_state
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#ifdef SHARED
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lrw a3, __syscall_do_cancel@GOTOFF
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addu a3, a3, gb
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jsr a3
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#else
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jbsr __syscall_do_cancel
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#endif
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END (__syscall_cancel_arch)
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