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117 lines
2.7 KiB
117 lines
2.7 KiB
/* |
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* This file is subject to the terms and conditions of the GNU General Public |
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* License. See the file "COPYING" in the main directory of this archive |
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* for more details. |
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* |
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* Copyright (C) 1995, 96, 97, 98, 99, 2000, 01, 02 by Ralf Baechle |
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* Copyright (C) 1999, 2000 Silicon Graphics, Inc. |
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* Copyright (C) 2001 MIPS Technologies, Inc. |
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*/ |
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#include <linux/errno.h> |
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#include <asm/asm.h> |
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#include <asm/asmmacro.h> |
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#include <asm/irqflags.h> |
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#include <asm/mipsregs.h> |
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#include <asm/regdef.h> |
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#include <asm/stackframe.h> |
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#include <asm/asm-offsets.h> |
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#include <asm/sysmips.h> |
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#include <asm/thread_info.h> |
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#include <asm/unistd.h> |
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#include <asm/war.h> |
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#ifndef CONFIG_MIPS32_COMPAT |
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/* Neither O32 nor N32, so define handle_sys here */ |
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#define handle_sys64 handle_sys |
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#endif |
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.align 5 |
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NESTED(handle_sys64, PT_SIZE, sp) |
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#if !defined(CONFIG_MIPS32_O32) && !defined(CONFIG_MIPS32_N32) |
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/* |
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* When 32-bit compatibility is configured scall_o32.S |
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* already did this. |
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*/ |
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.set noat |
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SAVE_SOME |
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TRACE_IRQS_ON_RELOAD |
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STI |
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.set at |
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#endif |
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#if !defined(CONFIG_MIPS32_O32) && !defined(CONFIG_MIPS32_N32) |
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ld t1, PT_EPC(sp) # skip syscall on return |
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daddiu t1, 4 # skip to next instruction |
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sd t1, PT_EPC(sp) |
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#endif |
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sd a3, PT_R26(sp) # save a3 for syscall restarting |
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li t1, _TIF_WORK_SYSCALL_ENTRY |
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LONG_L t0, TI_FLAGS($28) # syscall tracing enabled? |
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and t0, t1, t0 |
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bnez t0, syscall_trace_entry |
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syscall_common: |
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dsubu t2, v0, __NR_64_Linux |
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sltiu t0, t2, __NR_64_Linux_syscalls |
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beqz t0, illegal_syscall |
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dsll t0, t2, 3 # offset into table |
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dla t2, sys_call_table |
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daddu t0, t2, t0 |
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ld t2, (t0) # syscall routine |
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beqz t2, illegal_syscall |
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jalr t2 # Do The Real Thing (TM) |
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li t0, -EMAXERRNO - 1 # error? |
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sltu t0, t0, v0 |
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sd t0, PT_R7(sp) # set error flag |
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beqz t0, 1f |
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ld t1, PT_R2(sp) # syscall number |
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dnegu v0 # error |
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sd t1, PT_R0(sp) # save it for syscall restarting |
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1: sd v0, PT_R2(sp) # result |
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n64_syscall_exit: |
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j syscall_exit_partial |
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/* ------------------------------------------------------------------------ */ |
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syscall_trace_entry: |
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SAVE_STATIC |
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move a0, sp |
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move a1, v0 |
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jal syscall_trace_enter |
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bltz v0, 1f # seccomp failed? Skip syscall |
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RESTORE_STATIC |
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ld v0, PT_R2(sp) # Restore syscall (maybe modified) |
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ld a0, PT_R4(sp) # Restore argument registers |
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ld a1, PT_R5(sp) |
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ld a2, PT_R6(sp) |
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ld a3, PT_R7(sp) |
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ld a4, PT_R8(sp) |
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ld a5, PT_R9(sp) |
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j syscall_common |
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1: j syscall_exit |
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illegal_syscall: |
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/* This also isn't a 64-bit syscall, throw an error. */ |
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li v0, ENOSYS # error |
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sd v0, PT_R2(sp) |
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li t0, 1 # set error flag |
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sd t0, PT_R7(sp) |
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j n64_syscall_exit |
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END(handle_sys64) |
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#define __SYSCALL(nr, entry) PTR entry |
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.align 3 |
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.type sys_call_table, @object |
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EXPORT(sys_call_table) |
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#include <asm/syscall_table_64_n64.h> |
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#undef __SYSCALL
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