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127 lines
2.5 KiB
ArmAsm
127 lines
2.5 KiB
ArmAsm
/* Cancellable syscall wrapper. Linux/sh 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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long int nr,
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long int arg1,
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long int arg2,
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long int arg3,
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long int arg4,
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long int arg5,
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long int arg6) */
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ENTRY (__syscall_cancel_arch)
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#ifdef SHARED
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mov.l r12,@-r15
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cfi_def_cfa_offset (4)
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cfi_offset (12, -4)
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mova L(GT),r0
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mov.l L(GT),r12
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sts.l pr,@-r15
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cfi_def_cfa_offset (8)
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cfi_offset (17, -8)
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add r0,r12
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#else
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sts.l pr,@-r15
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cfi_def_cfa_offset (4)
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cfi_offset (17, -4)
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#endif
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.globl __syscall_cancel_arch_start
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__syscall_cancel_arch_start:
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/* if (*cancelhandling & CANCELED_BITMASK)
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__syscall_do_cancel() */
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mov.l @r4,r0
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tst #TCB_CANCELED_BITMASK,r0
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bf/s 1f
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/* Issue a 6 argument syscall. */
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mov r5,r3
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mov r6,r4
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mov r7,r5
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#ifdef SHARED
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mov.l @(8,r15),r6
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mov.l @(12,r15),r7
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mov.l @(16,r15),r0
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mov.l @(20,r15),r1
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#else
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mov.l @(4,r15),r6
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mov.l @(8,r15),r7
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mov.l @(12,r15),r0
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mov.l @(16,r15),r1
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#endif
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trapa #0x16
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.globl __syscall_cancel_arch_end
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__syscall_cancel_arch_end:
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/* The additional or is a workaround for a hardware issue:
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http://documentation.renesas.com/eng/products/mpumcu/tu/tnsh7456ae.pdf
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*/
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or r0,r0
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or r0,r0
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or r0,r0
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or r0,r0
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or r0,r0
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lds.l @r15+,pr
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cfi_remember_state
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cfi_restore (17)
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#ifdef SHARED
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cfi_def_cfa_offset (4)
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rts
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mov.l @r15+,r12
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cfi_def_cfa_offset (0)
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cfi_restore (12)
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.align 1
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1:
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cfi_restore_state
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mov.l L(SC),r1
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bsrf r1
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L(M):
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nop
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.align 2
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L(GT):
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.long _GLOBAL_OFFSET_TABLE_
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L(SC):
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.long __syscall_do_cancel-(L(M)+2)
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#else
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cfi_def_cfa_offset (0)
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rts
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nop
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.align 1
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1:
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cfi_restore_state
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mov.l 2f,r1
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jsr @r1
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nop
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.align 2
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2:
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.long __syscall_do_cancel
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#endif
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END (__syscall_cancel_arch)
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