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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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e28cbf2293
On an architecture that supports 32-bit compat we need to override the reported machine in uname with the 32-bit value. Instead of doing this separately in every architecture introduce a COMPAT_UTS_MACHINE define in <asm/compat.h> and apply it directly in sys_newuname(). Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Jeff Dike <jdike@addtoit.com> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: James Morris <jmorris@namei.org> Cc: Andreas Schwab <schwab@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
66 lines
1.8 KiB
C
66 lines
1.8 KiB
C
/*
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* System call table for UML/x86-64, copied from arch/x86_64/kernel/syscall.c
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* with some changes for UML.
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*/
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#include <linux/linkage.h>
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#include <linux/sys.h>
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#include <linux/cache.h>
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#include <kern_constants.h>
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#define __NO_STUBS
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/*
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* Below you can see, in terms of #define's, the differences between the x86-64
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* and the UML syscall table.
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*/
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/* Not going to be implemented by UML, since we have no hardware. */
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#define stub_iopl sys_ni_syscall
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#define sys_ioperm sys_ni_syscall
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/*
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* The UML TLS problem. Note that x86_64 does not implement this, so the below
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* is needed only for the ia32 compatibility.
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*/
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/* On UML we call it this way ("old" means it's not mmap2) */
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#define sys_mmap old_mmap
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#define stub_clone sys_clone
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#define stub_fork sys_fork
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#define stub_vfork sys_vfork
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#define stub_execve sys_execve
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#define stub_rt_sigsuspend sys_rt_sigsuspend
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#define stub_sigaltstack sys_sigaltstack
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#define stub_rt_sigreturn sys_rt_sigreturn
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#define __SYSCALL(nr, sym) extern asmlinkage void sym(void) ;
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#undef _ASM_X86_UNISTD_64_H
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#include "../../x86/include/asm/unistd_64.h"
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#undef __SYSCALL
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#define __SYSCALL(nr, sym) [ nr ] = sym,
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#undef _ASM_X86_UNISTD_64_H
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typedef void (*sys_call_ptr_t)(void);
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extern void sys_ni_syscall(void);
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/*
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* We used to have a trick here which made sure that holes in the
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* x86_64 table were filled in with sys_ni_syscall, but a comment in
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* unistd_64.h says that holes aren't allowed, so the trick was
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* removed.
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* The trick looked like this
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* [0 ... UM_NR_syscall_max] = &sys_ni_syscall
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* before including unistd_64.h - the later initializations overwrote
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* the sys_ni_syscall filler.
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*/
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sys_call_ptr_t sys_call_table[] __cacheline_aligned = {
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#include "../../x86/include/asm/unistd_64.h"
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};
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int syscall_table_size = sizeof(sys_call_table);
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