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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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454d7ef81a
Currently the select system call is wired up with the SYSX_SPU() macro. The SYSX_SPU() is not handled by systbl_chk.c, which means the syscall number for select is not checked. That hides the fact that the syscall number for select is actually __NR__newselect not __NR_select. In a following patch we'd like to drop ppc32_select() which means select will become a regular COMPAT_SYS_SPU() syscall. But COMPAT_SYS_SPU() can't deal with the fact that the syscall number is actually __NR__newselect. We also can't just redefine __NR_select because that's still used for the old select call. So add a new COMPAT_NEW_SPU() that does the same thing as COMPAT_SYS_SPU() except it encodes that we're using the new number. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
51 lines
1.7 KiB
ArmAsm
51 lines
1.7 KiB
ArmAsm
/*
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* This file contains the table of syscall-handling functions.
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* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
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*
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* Largely rewritten by Cort Dougan (cort@cs.nmt.edu)
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* and Paul Mackerras.
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*
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* Adapted for iSeries by Mike Corrigan (mikejc@us.ibm.com)
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* PPC64 updates by Dave Engebretsen (engebret@us.ibm.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <asm/ppc_asm.h>
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#ifdef CONFIG_PPC64
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#define SYSCALL(func) .8byte DOTSYM(sys_##func),DOTSYM(sys_##func)
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#define COMPAT_SYS(func) .8byte DOTSYM(sys_##func),DOTSYM(compat_sys_##func)
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#define PPC_SYS(func) .8byte DOTSYM(ppc_##func),DOTSYM(ppc_##func)
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#define OLDSYS(func) .8byte DOTSYM(sys_ni_syscall),DOTSYM(sys_ni_syscall)
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#define SYS32ONLY(func) .8byte DOTSYM(sys_ni_syscall),DOTSYM(compat_sys_##func)
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#define PPC64ONLY(func) .8byte DOTSYM(ppc_##func),DOTSYM(sys_ni_syscall)
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#define SYSX(f, f3264, f32) .8byte DOTSYM(f),DOTSYM(f3264)
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#else
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#define SYSCALL(func) .long sys_##func
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#define COMPAT_SYS(func) .long sys_##func
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#define PPC_SYS(func) .long ppc_##func
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#define OLDSYS(func) .long sys_##func
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#define SYS32ONLY(func) .long sys_##func
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#define PPC64ONLY(func) .long sys_ni_syscall
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#define SYSX(f, f3264, f32) .long f32
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#endif
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#define SYSCALL_SPU(func) SYSCALL(func)
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#define COMPAT_SYS_SPU(func) COMPAT_SYS(func)
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#define COMPAT_SPU_NEW(func) COMPAT_SYS(func)
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#define SYSX_SPU(f, f3264, f32) SYSX(f, f3264, f32)
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.section .rodata,"a"
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#ifdef CONFIG_PPC64
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.p2align 3
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#endif
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.globl sys_call_table
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sys_call_table:
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#include <asm/systbl.h>
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