^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * This file is subject to the terms and conditions of the GNU General Public
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * License. See the file "COPYING" in the main directory of this archive
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 1995, 96, 97, 98, 99, 2000, 01 by Ralf Baechle
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Copyright (C) 2001 MIPS Technologies, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <asm/asm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <asm/asmmacro.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <asm/irqflags.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <asm/mipsregs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <asm/regdef.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <asm/stackframe.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <asm/thread_info.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <asm/unistd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #ifndef CONFIG_MIPS32_O32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) /* No O32, so define handle_sys here */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define handle_sysn32 handle_sys
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) .align 5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) NESTED(handle_sysn32, PT_SIZE, sp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #ifndef CONFIG_MIPS32_O32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) .set noat
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) SAVE_SOME
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) TRACE_IRQS_ON_RELOAD
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) STI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) .set at
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) dsubu t0, v0, __NR_N32_Linux # check syscall number
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) sltiu t0, t0, __NR_N32_Linux_syscalls
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #ifndef CONFIG_MIPS32_O32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) ld t1, PT_EPC(sp) # skip syscall on return
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) daddiu t1, 4 # skip to next instruction
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) sd t1, PT_EPC(sp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) beqz t0, not_n32_scall
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) sd a3, PT_R26(sp) # save a3 for syscall restarting
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) li t1, _TIF_WORK_SYSCALL_ENTRY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) LONG_L t0, TI_FLAGS($28) # syscall tracing enabled?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) and t0, t1, t0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) bnez t0, n32_syscall_trace_entry
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) syscall_common:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) dsll t0, v0, 3 # offset into table
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) ld t2, (sysn32_call_table - (__NR_N32_Linux * 8))(t0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) jalr t2 # Do The Real Thing (TM)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) li t0, -EMAXERRNO - 1 # error?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) sltu t0, t0, v0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) sd t0, PT_R7(sp) # set error flag
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) beqz t0, 1f
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) ld t1, PT_R2(sp) # syscall number
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) dnegu v0 # error
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) sd t1, PT_R0(sp) # save it for syscall restarting
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 1: sd v0, PT_R2(sp) # result
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) j syscall_exit_partial
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) /* ------------------------------------------------------------------------ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) n32_syscall_trace_entry:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) SAVE_STATIC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) move a0, sp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) move a1, v0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) jal syscall_trace_enter
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) bltz v0, 1f # seccomp failed? Skip syscall
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) RESTORE_STATIC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) ld v0, PT_R2(sp) # Restore syscall (maybe modified)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) ld a0, PT_R4(sp) # Restore argument registers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) ld a1, PT_R5(sp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) ld a2, PT_R6(sp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) ld a3, PT_R7(sp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) ld a4, PT_R8(sp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) ld a5, PT_R9(sp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) dsubu t2, v0, __NR_N32_Linux # check (new) syscall number
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) sltiu t0, t2, __NR_N32_Linux_syscalls
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) beqz t0, not_n32_scall
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) j syscall_common
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) 1: j syscall_exit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) not_n32_scall:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) /* This is not an n32 compatibility syscall, pass it on to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) the n64 syscall handlers. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) j handle_sys64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) END(handle_sysn32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) #define __SYSCALL(nr, entry) PTR entry
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) .type sysn32_call_table, @object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) EXPORT(sysn32_call_table)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) #include <asm/syscall_table_64_n32.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) #undef __SYSCALL
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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