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[POWERPC] Check that the syscall table matches the syscall numbers
Also check that __NR_syscalls has been updated appropriately. Hopefully this will catch any out of order additions to the table in the future. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
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@ -91,3 +91,13 @@ obj-$(CONFIG_PPC64) += $(obj64-y)
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extra-$(CONFIG_PPC_FPU) += fpu.o
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extra-$(CONFIG_PPC64) += entry_64.o
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extra-y += systbl_chk.i
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$(obj)/systbl.o: systbl_chk
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quiet_cmd_systbl_chk = CALL $<
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cmd_systbl_chk = $(CONFIG_SHELL) $< $(obj)/systbl_chk.i
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PHONY += systbl_chk
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systbl_chk: $(src)/systbl_chk.sh $(obj)/systbl_chk.i
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$(call cmd,systbl_chk)
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58
arch/powerpc/kernel/systbl_chk.c
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58
arch/powerpc/kernel/systbl_chk.c
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@ -0,0 +1,58 @@
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/*
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* This file, when run through CPP produces a list of syscall numbers
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* in the order of systbl.h. That way we can check for gaps and syscalls
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* that are out of order.
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*
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* Unfortunately, we cannot check for the correct ordering of entries
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* using SYSX().
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*
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* Copyright © IBM Corporation
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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/unistd.h>
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#define SYSCALL(func) __NR_##func
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#define COMPAT_SYS(func) __NR_##func
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#define PPC_SYS(func) __NR_##func
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#ifdef CONFIG_PPC64
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#define OLDSYS(func) -1
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#define SYS32ONLY(func) -1
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#else
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#define OLDSYS(func) __NR_old##func
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#define SYS32ONLY(func) __NR_##func
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#endif
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#define SYSX(f, f3264, f32) -1
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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 PPC_SYS_SPU(func) PPC_SYS(func)
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#define SYSX_SPU(f, f3264, f32) SYSX(f, f3264, f32)
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/* Just insert a marker for ni_syscalls */
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#define __NR_ni_syscall -1
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/*
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* These are the known exceptions.
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* Hopefully, there will be no more.
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*/
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#define __NR_llseek __NR__llseek
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#undef __NR_umount
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#define __NR_umount __NR_umount2
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#define __NR_old_getrlimit __NR_getrlimit
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#define __NR_newstat __NR_stat
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#define __NR_newlstat __NR_lstat
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#define __NR_newfstat __NR_fstat
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#define __NR_newuname __NR_uname
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#define __NR_sysctl __NR__sysctl
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#define __NR_olddebug_setcontext __NR_sys_debug_setcontext
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/* We call sys_ugetrlimit for syscall number __NR_getrlimit */
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#define getrlimit ugetrlimit
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START_TABLE
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#include <asm/systbl.h>
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END_TABLE __NR_syscalls
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33
arch/powerpc/kernel/systbl_chk.sh
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33
arch/powerpc/kernel/systbl_chk.sh
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@ -0,0 +1,33 @@
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#!/bin/sh
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#
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# Just process the CPP output from systbl_chk.c and complain
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# if anything is out of order.
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#
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# Copyright © 2008 IBM Corporation
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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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awk 'BEGIN { num = -1; } # Ignore the beginning of the file
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/^#/ { next; }
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/^[ \t]*$/ { next; }
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/^START_TABLE/ { num = 0; next; }
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/^END_TABLE/ {
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if (num != $2) {
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printf "__NR_syscalls (%s) is not one more than the last syscall (%s)\n",
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$2, num - 1;
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exit(1);
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}
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num = -1; # Ignore the rest of the file
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}
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{
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if (num == -1) next;
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if (($1 != -1) && ($1 != num)) {
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printf "Syscall %s out of order (expected %s)\n",
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$1, num;
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exit(1);
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};
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num++;
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}' "$1"
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