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author | Al Viro <viro@ftp.linux.org.uk> | 2011-08-18 19:06:39 (GMT) |
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committer | Richard Weinberger <richard@nod.at> | 2011-11-02 13:15:05 (GMT) |
commit | 5c48b108ecbf6505d929e64d50dace13ac2bdf34 (patch) | |
tree | 016904f84fbe05aa301c5cdfe712d90f6bb828fe /arch/x86/um/sys_call_table_64.c | |
parent | 7bbe7204e93734fe79d8aac3e08a7cb4624b5004 (diff) | |
download | linux-fsl-qoriq-5c48b108ecbf6505d929e64d50dace13ac2bdf34.tar.xz |
um: take arch/um/sys-x86 to arch/x86/um
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'arch/x86/um/sys_call_table_64.c')
-rw-r--r-- | arch/x86/um/sys_call_table_64.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/arch/x86/um/sys_call_table_64.c b/arch/x86/um/sys_call_table_64.c new file mode 100644 index 0000000..f46de82 --- /dev/null +++ b/arch/x86/um/sys_call_table_64.c @@ -0,0 +1,64 @@ +/* + * System call table for UML/x86-64, copied from arch/x86_64/kernel/syscall.c + * with some changes for UML. + */ + +#include <linux/linkage.h> +#include <linux/sys.h> +#include <linux/cache.h> + +#define __NO_STUBS + +/* + * Below you can see, in terms of #define's, the differences between the x86-64 + * and the UML syscall table. + */ + +/* Not going to be implemented by UML, since we have no hardware. */ +#define stub_iopl sys_ni_syscall +#define sys_ioperm sys_ni_syscall + +/* + * The UML TLS problem. Note that x86_64 does not implement this, so the below + * is needed only for the ia32 compatibility. + */ + +/* On UML we call it this way ("old" means it's not mmap2) */ +#define sys_mmap old_mmap + +#define stub_clone sys_clone +#define stub_fork sys_fork +#define stub_vfork sys_vfork +#define stub_execve sys_execve +#define stub_rt_sigsuspend sys_rt_sigsuspend +#define stub_sigaltstack sys_sigaltstack +#define stub_rt_sigreturn sys_rt_sigreturn + +#define __SYSCALL(nr, sym) extern asmlinkage void sym(void) ; +#undef _ASM_X86_UNISTD_64_H +#include "../../x86/include/asm/unistd_64.h" + +#undef __SYSCALL +#define __SYSCALL(nr, sym) [ nr ] = sym, +#undef _ASM_X86_UNISTD_64_H + +typedef void (*sys_call_ptr_t)(void); + +extern void sys_ni_syscall(void); + +/* + * We used to have a trick here which made sure that holes in the + * x86_64 table were filled in with sys_ni_syscall, but a comment in + * unistd_64.h says that holes aren't allowed, so the trick was + * removed. + * The trick looked like this + * [0 ... UM_NR_syscall_max] = &sys_ni_syscall + * before including unistd_64.h - the later initializations overwrote + * the sys_ni_syscall filler. + */ + +sys_call_ptr_t sys_call_table[] __cacheline_aligned = { +#include "../../x86/include/asm/unistd_64.h" +}; + +int syscall_table_size = sizeof(sys_call_table); |