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Define a few macros to validate userspace selectors.

This commit is contained in:
fvdl 2003-10-13 18:40:16 +00:00
parent dc921bb48e
commit ef0bb54192
1 changed files with 16 additions and 1 deletions
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17
sys/arch/amd64/include/segments.h
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@ -1,4 +1,4 @@
/* $NetBSD: segments.h,v 1.2 2003/08/07 16:26:36 agc Exp $ */
/* $NetBSD: segments.h,v 1.3 2003/10/13 18:40:16 fvdl Exp $ */
/*-
* Copyright (c) 1990 The Regents of the University of California.
@ -333,4 +333,19 @@ void cpu_init_idt __P((void));
#define LSYSRETBASE_SEL LUCODE32_SEL
/*
* Checks for valid user selectors. If USER_LDT ever gets implemented
* for amd64, these must check the ldt length and SEL_UPL if a user
* ldt is active.
*/
#define VALID_USER_DSEL32(s) \
((s) == GSEL(GUDATA32_SEL, SEL_UPL) || (s) == LSEL(LUDATA32_SEL, SEL_UPL))
#define VALID_USER_CSEL32(s) \
((s) == GSEL(GUCODE32_SEL, SEL_UPL) || (s) == LSEL(LUCODE32_SEL, SEL_UPL))
#define VALID_USER_CSEL(s) \
((s) == GSEL(GUCODE_SEL, SEL_UPL) || (s) == LSEL(LUCODE_SEL, SEL_UPL))
#define VALID_USER_DSEL(s) \
((s) == GSEL(GUDATA_SEL, SEL_UPL) || (s) == LSEL(LUDATA_SEL, SEL_UPL))
#endif /* _AMD64_SEGMENTS_H_ */