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581 lines
14 KiB
581 lines
14 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 - 2000, 2001 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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* Copyright (C) 2004 Thiemo Seufer |
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* |
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* Hairy, the userspace application uses a different argument passing |
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* convention than the kernel, so we have to translate things from o32 |
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* to ABI64 calling convention. 64-bit syscalls are also processed |
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* here for now. |
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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/thread_info.h> |
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#include <asm/unistd.h> |
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#include <asm/sysmips.h> |
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|
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.align 5 |
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NESTED(handle_sys, PT_SIZE, sp) |
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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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ld t1, PT_EPC(sp) # skip syscall on return |
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|
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dsubu t0, v0, __NR_O32_Linux # check syscall number |
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sltiu t0, t0, __NR_O32_Linux_syscalls + 1 |
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daddiu t1, 4 # skip to next instruction |
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sd t1, PT_EPC(sp) |
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beqz t0, not_o32_scall |
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#if 0 |
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SAVE_ALL |
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move a1, v0 |
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PRINT("Scall %ld\n") |
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RESTORE_ALL |
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#endif |
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|
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/* We don't want to stumble over broken sign extensions from |
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userland. O32 does never use the upper half. */ |
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sll a0, a0, 0 |
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sll a1, a1, 0 |
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sll a2, a2, 0 |
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sll a3, a3, 0 |
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|
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dsll t0, v0, 3 # offset into table |
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ld t2, (sys32_call_table - (__NR_O32_Linux * 8))(t0) |
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|
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sd a3, PT_R26(sp) # save a3 for syscall restarting |
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|
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/* |
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* More than four arguments. Try to deal with it by copying the |
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* stack arguments from the user stack to the kernel stack. |
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* This Sucks (TM). |
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* |
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* We intentionally keep the kernel stack a little below the top of |
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* userspace so we don't have to do a slower byte accurate check here. |
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*/ |
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ld t0, PT_R29(sp) # get old user stack pointer |
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daddu t1, t0, 32 |
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bltz t1, bad_stack |
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|
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load_a4: lw a4, 16(t0) # argument #5 from usp |
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load_a5: lw a5, 20(t0) # argument #6 from usp |
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load_a6: lw a6, 24(t0) # argument #7 from usp |
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load_a7: lw a7, 28(t0) # argument #8 from usp |
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loads_done: |
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|
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.section __ex_table,"a" |
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PTR load_a4, bad_stack_a4 |
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PTR load_a5, bad_stack_a5 |
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PTR load_a6, bad_stack_a6 |
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PTR load_a7, bad_stack_a7 |
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.previous |
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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, trace_a_syscall |
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syscall_common: |
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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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|
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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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|
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o32_syscall_exit: |
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j syscall_exit_partial |
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|
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/* ------------------------------------------------------------------------ */ |
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|
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trace_a_syscall: |
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SAVE_STATIC |
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sd a4, PT_R8(sp) # Save argument registers |
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sd a5, PT_R9(sp) |
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sd a6, PT_R10(sp) |
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sd a7, PT_R11(sp) # For indirect syscalls |
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|
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move s0, t2 # Save syscall pointer |
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move a0, sp |
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/* |
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* absolute syscall number is in v0 unless we called syscall(__NR_###) |
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* where the real syscall number is in a0 |
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* note: NR_syscall is the first O32 syscall but the macro is |
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* only defined when compiling with -mabi=32 (CONFIG_32BIT) |
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* therefore __NR_O32_Linux is used (4000) |
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*/ |
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.set push |
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.set reorder |
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subu t1, v0, __NR_O32_Linux |
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move a1, v0 |
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bnez t1, 1f /* __NR_syscall at offset 0 */ |
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lw a1, PT_R4(sp) /* Arg1 for __NR_syscall case */ |
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.set pop |
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1: jal syscall_trace_enter |
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bltz v0, 1f # seccomp failed? Skip syscall |
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move t2, s0 |
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RESTORE_STATIC |
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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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ld a6, PT_R10(sp) |
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ld a7, PT_R11(sp) # For indirect syscalls |
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j syscall_common |
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1: j syscall_exit |
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/* ------------------------------------------------------------------------ */ |
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/* |
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* The stackpointer for a call with more than 4 arguments is bad. |
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*/ |
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bad_stack: |
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li v0, EFAULT |
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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 o32_syscall_exit |
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bad_stack_a4: |
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li a4, 0 |
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b load_a5 |
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bad_stack_a5: |
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li a5, 0 |
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b load_a6 |
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bad_stack_a6: |
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li a6, 0 |
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b load_a7 |
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bad_stack_a7: |
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li a7, 0 |
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b loads_done |
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not_o32_scall: |
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/* |
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* This is not an o32 compatibility syscall, pass it on |
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* to the 64-bit syscall handlers. |
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*/ |
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#ifdef CONFIG_MIPS32_N32 |
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j handle_sysn32 |
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#else |
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j handle_sys64 |
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#endif |
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END(handle_sys) |
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LEAF(sys32_syscall) |
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subu t0, a0, __NR_O32_Linux # check syscall number |
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sltiu v0, t0, __NR_O32_Linux_syscalls + 1 |
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beqz t0, einval # do not recurse |
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dsll t1, t0, 3 |
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beqz v0, einval |
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ld t2, sys32_call_table(t1) # syscall routine |
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sd a0, PT_R2(sp) # call routine directly on restart |
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move a0, a1 # shift argument registers |
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move a1, a2 |
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move a2, a3 |
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move a3, a4 |
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move a4, a5 |
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move a5, a6 |
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move a6, a7 |
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sd a0, PT_R4(sp) # ... and push back a0 - a3, some |
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sd a1, PT_R5(sp) # syscalls expect them there |
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sd a2, PT_R6(sp) |
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sd a3, PT_R7(sp) |
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sd a3, PT_R26(sp) # update a3 for syscall restarting |
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jr t2 |
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/* Unreached */ |
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einval: li v0, -ENOSYS |
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jr ra |
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END(sys32_syscall) |
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.align 3 |
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.type sys32_call_table,@object |
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EXPORT(sys32_call_table) |
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PTR sys32_syscall /* 4000 */ |
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PTR sys_exit |
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PTR __sys_fork |
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PTR sys_read |
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PTR sys_write |
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PTR compat_sys_open /* 4005 */ |
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PTR sys_close |
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PTR sys_waitpid |
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PTR sys_creat |
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PTR sys_link |
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PTR sys_unlink /* 4010 */ |
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PTR compat_sys_execve |
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PTR sys_chdir |
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PTR compat_sys_time |
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PTR sys_mknod |
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PTR sys_chmod /* 4015 */ |
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PTR sys_lchown |
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PTR sys_ni_syscall |
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PTR sys_ni_syscall /* was sys_stat */ |
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PTR sys_lseek |
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PTR sys_getpid /* 4020 */ |
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PTR compat_sys_mount |
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PTR sys_oldumount |
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PTR sys_setuid |
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PTR sys_getuid |
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PTR compat_sys_stime /* 4025 */ |
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PTR compat_sys_ptrace |
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PTR sys_alarm |
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PTR sys_ni_syscall /* was sys_fstat */ |
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PTR sys_pause |
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PTR compat_sys_utime /* 4030 */ |
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PTR sys_ni_syscall |
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PTR sys_ni_syscall |
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PTR sys_access |
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PTR sys_nice |
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PTR sys_ni_syscall /* 4035 */ |
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PTR sys_sync |
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PTR sys_kill |
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PTR sys_rename |
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PTR sys_mkdir |
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PTR sys_rmdir /* 4040 */ |
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PTR sys_dup |
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PTR sysm_pipe |
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PTR compat_sys_times |
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PTR sys_ni_syscall |
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PTR sys_brk /* 4045 */ |
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PTR sys_setgid |
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PTR sys_getgid |
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PTR sys_ni_syscall /* was signal 2 */ |
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PTR sys_geteuid |
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PTR sys_getegid /* 4050 */ |
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PTR sys_acct |
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PTR sys_umount |
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PTR sys_ni_syscall |
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PTR compat_sys_ioctl |
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PTR compat_sys_fcntl /* 4055 */ |
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PTR sys_ni_syscall |
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PTR sys_setpgid |
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PTR sys_ni_syscall |
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PTR sys_olduname |
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PTR sys_umask /* 4060 */ |
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PTR sys_chroot |
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PTR compat_sys_ustat |
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PTR sys_dup2 |
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PTR sys_getppid |
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PTR sys_getpgrp /* 4065 */ |
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PTR sys_setsid |
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PTR sys_32_sigaction |
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PTR sys_sgetmask |
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PTR sys_ssetmask |
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PTR sys_setreuid /* 4070 */ |
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PTR sys_setregid |
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PTR sys32_sigsuspend |
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PTR compat_sys_sigpending |
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PTR sys_sethostname |
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PTR compat_sys_setrlimit /* 4075 */ |
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PTR compat_sys_getrlimit |
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PTR compat_sys_getrusage |
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PTR compat_sys_gettimeofday |
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PTR compat_sys_settimeofday |
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PTR sys_getgroups /* 4080 */ |
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PTR sys_setgroups |
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PTR sys_ni_syscall /* old_select */ |
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PTR sys_symlink |
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PTR sys_ni_syscall /* was sys_lstat */ |
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PTR sys_readlink /* 4085 */ |
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PTR sys_uselib |
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PTR sys_swapon |
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PTR sys_reboot |
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PTR compat_sys_old_readdir |
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PTR sys_mips_mmap /* 4090 */ |
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PTR sys_munmap |
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PTR compat_sys_truncate |
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PTR compat_sys_ftruncate |
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PTR sys_fchmod |
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PTR sys_fchown /* 4095 */ |
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PTR sys_getpriority |
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PTR sys_setpriority |
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PTR sys_ni_syscall |
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PTR compat_sys_statfs |
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PTR compat_sys_fstatfs /* 4100 */ |
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PTR sys_ni_syscall /* sys_ioperm */ |
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PTR compat_sys_socketcall |
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PTR sys_syslog |
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PTR compat_sys_setitimer |
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PTR compat_sys_getitimer /* 4105 */ |
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PTR compat_sys_newstat |
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PTR compat_sys_newlstat |
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PTR compat_sys_newfstat |
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PTR sys_uname |
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PTR sys_ni_syscall /* sys_ioperm *//* 4110 */ |
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PTR sys_vhangup |
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PTR sys_ni_syscall /* was sys_idle */ |
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PTR sys_ni_syscall /* sys_vm86 */ |
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PTR compat_sys_wait4 |
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PTR sys_swapoff /* 4115 */ |
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PTR compat_sys_sysinfo |
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PTR compat_sys_ipc |
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PTR sys_fsync |
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PTR sys32_sigreturn |
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PTR __sys_clone /* 4120 */ |
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PTR sys_setdomainname |
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PTR sys_newuname |
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PTR sys_ni_syscall /* sys_modify_ldt */ |
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PTR compat_sys_adjtimex |
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PTR sys_mprotect /* 4125 */ |
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PTR compat_sys_sigprocmask |
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PTR sys_ni_syscall /* was creat_module */ |
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PTR sys_init_module |
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PTR sys_delete_module |
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PTR sys_ni_syscall /* 4130, get_kernel_syms */ |
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PTR sys_quotactl |
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PTR sys_getpgid |
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PTR sys_fchdir |
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PTR sys_bdflush |
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PTR sys_sysfs /* 4135 */ |
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PTR sys_32_personality |
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PTR sys_ni_syscall /* for afs_syscall */ |
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PTR sys_setfsuid |
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PTR sys_setfsgid |
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PTR sys_32_llseek /* 4140 */ |
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PTR compat_sys_getdents |
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PTR compat_sys_select |
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PTR sys_flock |
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PTR sys_msync |
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PTR compat_sys_readv /* 4145 */ |
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PTR compat_sys_writev |
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PTR sys_cacheflush |
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PTR sys_cachectl |
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PTR __sys_sysmips |
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PTR sys_ni_syscall /* 4150 */ |
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PTR sys_getsid |
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PTR sys_fdatasync |
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PTR compat_sys_sysctl |
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PTR sys_mlock |
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PTR sys_munlock /* 4155 */ |
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PTR sys_mlockall |
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PTR sys_munlockall |
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PTR sys_sched_setparam |
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PTR sys_sched_getparam |
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PTR sys_sched_setscheduler /* 4160 */ |
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PTR sys_sched_getscheduler |
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PTR sys_sched_yield |
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PTR sys_sched_get_priority_max |
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PTR sys_sched_get_priority_min |
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PTR compat_sys_sched_rr_get_interval /* 4165 */ |
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PTR compat_sys_nanosleep |
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PTR sys_mremap |
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PTR sys_accept |
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PTR sys_bind |
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PTR sys_connect /* 4170 */ |
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PTR sys_getpeername |
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PTR sys_getsockname |
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PTR compat_sys_getsockopt |
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PTR sys_listen |
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PTR compat_sys_recv /* 4175 */ |
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PTR compat_sys_recvfrom |
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PTR compat_sys_recvmsg |
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PTR sys_send |
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PTR compat_sys_sendmsg |
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PTR sys_sendto /* 4180 */ |
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PTR compat_sys_setsockopt |
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PTR sys_shutdown |
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PTR sys_socket |
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PTR sys_socketpair |
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PTR sys_setresuid /* 4185 */ |
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PTR sys_getresuid |
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PTR sys_ni_syscall /* was query_module */ |
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PTR sys_poll |
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PTR sys_ni_syscall /* was nfsservctl */ |
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PTR sys_setresgid /* 4190 */ |
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PTR sys_getresgid |
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PTR sys_prctl |
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PTR sys32_rt_sigreturn |
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PTR compat_sys_rt_sigaction |
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PTR compat_sys_rt_sigprocmask /* 4195 */ |
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PTR compat_sys_rt_sigpending |
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PTR compat_sys_rt_sigtimedwait |
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PTR compat_sys_rt_sigqueueinfo |
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PTR compat_sys_rt_sigsuspend |
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PTR sys_32_pread /* 4200 */ |
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PTR sys_32_pwrite |
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PTR sys_chown |
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PTR sys_getcwd |
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PTR sys_capget |
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PTR sys_capset /* 4205 */ |
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PTR compat_sys_sigaltstack |
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PTR compat_sys_sendfile |
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PTR sys_ni_syscall |
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PTR sys_ni_syscall |
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PTR sys_mips_mmap2 /* 4210 */ |
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PTR sys_32_truncate64 |
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PTR sys_32_ftruncate64 |
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PTR sys_newstat |
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PTR sys_newlstat |
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PTR sys_newfstat /* 4215 */ |
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PTR sys_pivot_root |
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PTR sys_mincore |
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PTR sys_madvise |
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PTR sys_getdents64 |
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PTR compat_sys_fcntl64 /* 4220 */ |
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PTR sys_ni_syscall |
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PTR sys_gettid |
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PTR sys32_readahead |
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PTR sys_setxattr |
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PTR sys_lsetxattr /* 4225 */ |
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PTR sys_fsetxattr |
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PTR sys_getxattr |
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PTR sys_lgetxattr |
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PTR sys_fgetxattr |
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PTR sys_listxattr /* 4230 */ |
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PTR sys_llistxattr |
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PTR sys_flistxattr |
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PTR sys_removexattr |
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PTR sys_lremovexattr |
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PTR sys_fremovexattr /* 4235 */ |
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PTR sys_tkill |
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PTR sys_sendfile64 |
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PTR compat_sys_futex |
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PTR compat_sys_sched_setaffinity |
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PTR compat_sys_sched_getaffinity /* 4240 */ |
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PTR compat_sys_io_setup |
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PTR sys_io_destroy |
|
PTR compat_sys_io_getevents |
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PTR compat_sys_io_submit |
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PTR sys_io_cancel /* 4245 */ |
|
PTR sys_exit_group |
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PTR compat_sys_lookup_dcookie |
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PTR sys_epoll_create |
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PTR sys_epoll_ctl |
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PTR sys_epoll_wait /* 4250 */ |
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PTR sys_remap_file_pages |
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PTR sys_set_tid_address |
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PTR sys_restart_syscall |
|
PTR sys32_fadvise64_64 |
|
PTR compat_sys_statfs64 /* 4255 */ |
|
PTR compat_sys_fstatfs64 |
|
PTR compat_sys_timer_create |
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PTR compat_sys_timer_settime |
|
PTR compat_sys_timer_gettime |
|
PTR sys_timer_getoverrun /* 4260 */ |
|
PTR sys_timer_delete |
|
PTR compat_sys_clock_settime |
|
PTR compat_sys_clock_gettime |
|
PTR compat_sys_clock_getres |
|
PTR compat_sys_clock_nanosleep /* 4265 */ |
|
PTR sys_tgkill |
|
PTR compat_sys_utimes |
|
PTR compat_sys_mbind |
|
PTR compat_sys_get_mempolicy |
|
PTR compat_sys_set_mempolicy /* 4270 */ |
|
PTR compat_sys_mq_open |
|
PTR sys_mq_unlink |
|
PTR compat_sys_mq_timedsend |
|
PTR compat_sys_mq_timedreceive |
|
PTR compat_sys_mq_notify /* 4275 */ |
|
PTR compat_sys_mq_getsetattr |
|
PTR sys_ni_syscall /* sys_vserver */ |
|
PTR compat_sys_waitid |
|
PTR sys_ni_syscall /* available, was setaltroot */ |
|
PTR sys_add_key /* 4280 */ |
|
PTR sys_request_key |
|
PTR compat_sys_keyctl |
|
PTR sys_set_thread_area |
|
PTR sys_inotify_init |
|
PTR sys_inotify_add_watch /* 4285 */ |
|
PTR sys_inotify_rm_watch |
|
PTR compat_sys_migrate_pages |
|
PTR compat_sys_openat |
|
PTR sys_mkdirat |
|
PTR sys_mknodat /* 4290 */ |
|
PTR sys_fchownat |
|
PTR compat_sys_futimesat |
|
PTR sys_newfstatat |
|
PTR sys_unlinkat |
|
PTR sys_renameat /* 4295 */ |
|
PTR sys_linkat |
|
PTR sys_symlinkat |
|
PTR sys_readlinkat |
|
PTR sys_fchmodat |
|
PTR sys_faccessat /* 4300 */ |
|
PTR compat_sys_pselect6 |
|
PTR compat_sys_ppoll |
|
PTR sys_unshare |
|
PTR sys_splice |
|
PTR sys32_sync_file_range /* 4305 */ |
|
PTR sys_tee |
|
PTR compat_sys_vmsplice |
|
PTR compat_sys_move_pages |
|
PTR compat_sys_set_robust_list |
|
PTR compat_sys_get_robust_list /* 4310 */ |
|
PTR compat_sys_kexec_load |
|
PTR sys_getcpu |
|
PTR compat_sys_epoll_pwait |
|
PTR sys_ioprio_set |
|
PTR sys_ioprio_get /* 4315 */ |
|
PTR compat_sys_utimensat |
|
PTR compat_sys_signalfd |
|
PTR sys_ni_syscall /* was timerfd */ |
|
PTR sys_eventfd |
|
PTR sys32_fallocate /* 4320 */ |
|
PTR sys_timerfd_create |
|
PTR compat_sys_timerfd_gettime |
|
PTR compat_sys_timerfd_settime |
|
PTR compat_sys_signalfd4 |
|
PTR sys_eventfd2 /* 4325 */ |
|
PTR sys_epoll_create1 |
|
PTR sys_dup3 |
|
PTR sys_pipe2 |
|
PTR sys_inotify_init1 |
|
PTR compat_sys_preadv /* 4330 */ |
|
PTR compat_sys_pwritev |
|
PTR compat_sys_rt_tgsigqueueinfo |
|
PTR sys_perf_event_open |
|
PTR sys_accept4 |
|
PTR compat_sys_recvmmsg /* 4335 */ |
|
PTR sys_fanotify_init |
|
PTR compat_sys_fanotify_mark |
|
PTR sys_prlimit64 |
|
PTR sys_name_to_handle_at |
|
PTR compat_sys_open_by_handle_at /* 4340 */ |
|
PTR compat_sys_clock_adjtime |
|
PTR sys_syncfs |
|
PTR compat_sys_sendmmsg |
|
PTR sys_setns |
|
PTR compat_sys_process_vm_readv /* 4345 */ |
|
PTR compat_sys_process_vm_writev |
|
PTR sys_kcmp |
|
PTR sys_finit_module |
|
PTR sys_sched_setattr |
|
PTR sys_sched_getattr /* 4350 */ |
|
PTR sys_renameat2 |
|
PTR sys_seccomp |
|
PTR sys_getrandom |
|
PTR sys_memfd_create |
|
PTR sys_bpf /* 4355 */ |
|
PTR compat_sys_execveat |
|
PTR sys_userfaultfd |
|
PTR sys_membarrier |
|
PTR sys_mlock2 |
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.size sys32_call_table,.-sys32_call_table
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