^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, 02 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/asm-offsets.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <asm/sysmips.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <asm/thread_info.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <asm/unistd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <asm/war.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #ifndef CONFIG_BINFMT_ELF32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) /* Neither O32 nor N32, so define handle_sys here */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define handle_sys64 handle_sys
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) .align 5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) NESTED(handle_sys64, PT_SIZE, sp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #if !defined(CONFIG_MIPS32_O32) && !defined(CONFIG_MIPS32_N32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * When 32-bit compatibility is configured scall_o32.S
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * already did this.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) .set noat
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) SAVE_SOME
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) TRACE_IRQS_ON_RELOAD
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) STI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) .set at
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #if !defined(CONFIG_MIPS32_O32) && !defined(CONFIG_MIPS32_N32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) ld t1, PT_EPC(sp) # skip syscall on return
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) daddiu t1, 4 # skip to next instruction
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) sd t1, PT_EPC(sp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) sd a3, PT_R26(sp) # save a3 for syscall restarting
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) li t1, _TIF_WORK_SYSCALL_ENTRY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) LONG_L t0, TI_FLAGS($28) # syscall tracing enabled?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) and t0, t1, t0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) bnez t0, syscall_trace_entry
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) syscall_common:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) dsubu t2, v0, __NR_64_Linux
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) sltiu t0, t2, __NR_64_Linux_syscalls
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) beqz t0, illegal_syscall
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) dsll t0, t2, 3 # offset into table
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) dla t2, sys_call_table
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) daddu t0, t2, t0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) ld t2, (t0) # syscall routine
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) beqz t2, illegal_syscall
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) jalr t2 # Do The Real Thing (TM)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) li t0, -EMAXERRNO - 1 # error?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) sltu t0, t0, v0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) sd t0, PT_R7(sp) # set error flag
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) beqz t0, 1f
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) ld t1, PT_R2(sp) # syscall number
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) dnegu v0 # error
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) sd t1, PT_R0(sp) # save it for syscall restarting
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) 1: sd v0, PT_R2(sp) # result
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) n64_syscall_exit:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) j syscall_exit_partial
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) /* ------------------------------------------------------------------------ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) syscall_trace_entry:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) SAVE_STATIC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) move a0, sp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) move a1, v0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) jal syscall_trace_enter
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) bltz v0, 1f # seccomp failed? Skip syscall
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) RESTORE_STATIC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) ld v0, PT_R2(sp) # Restore syscall (maybe modified)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) ld a0, PT_R4(sp) # Restore argument registers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) ld a1, PT_R5(sp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) ld a2, PT_R6(sp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) ld a3, PT_R7(sp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) ld a4, PT_R8(sp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) ld a5, PT_R9(sp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) j syscall_common
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 1: j syscall_exit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) illegal_syscall:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) /* This also isn't a 64-bit syscall, throw an error. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) li v0, ENOSYS # error
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) sd v0, PT_R2(sp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) li t0, 1 # set error flag
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) sd t0, PT_R7(sp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) j n64_syscall_exit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) END(handle_sys64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) #define __SYSCALL(nr, entry) PTR entry
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) .align 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) .type sys_call_table, @object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) EXPORT(sys_call_table)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) #include <asm/syscall_table_64_n64.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) #undef __SYSCALL
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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