60 lines
1.9 KiB
C
60 lines
1.9 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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#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 <linux/config.h>
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#define __NO_STUBS
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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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/* 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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/* 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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/*#define sys_set_thread_area sys_ni_syscall
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#define sys_get_thread_area sys_ni_syscall*/
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/* For __NR_time. The x86-64 name hopefully will change from sys_time64 to
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* sys_time (since the current situation is bogus). I've sent a patch to cleanup
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* this. Remove below the obsoleted line. */
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#define sys_time64 um_time
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#define sys_time um_time
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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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/* On x86-64 sys_uname is actually sys_newuname plus a compatibility trick.
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* See arch/x86_64/kernel/sys_x86_64.c */
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#define sys_uname sys_uname64
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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_64_UNISTD_H_
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#include <asm-x86_64/unistd.h>
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#undef __SYSCALL
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#define __SYSCALL(nr, sym) [ nr ] = sym,
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#undef _ASM_X86_64_UNISTD_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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sys_call_ptr_t sys_call_table[__NR_syscall_max+1] __cacheline_aligned = {
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/* Smells like a like a compiler bug -- it doesn't work when the & below is removed. */
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[0 ... __NR_syscall_max] = &sys_ni_syscall,
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#include <asm-x86_64/unistd.h>
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};
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