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rearrange the LDT entries so that (32-bit) COMPAT_10 binaries work again.

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in long mode, call gates use two slots, so the first entry (a call gate)
would overlap the second one (the 32-bit user code descriptor).
This commit is contained in:
chs 2013-01-07 17:03:06 +00:00
parent d4d0b05e7a
commit d26d978fbd
1 changed files with 8 additions and 5 deletions
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13
sys/arch/amd64/include/segments.h
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@ -1,4 +1,4 @@
/* $NetBSD: segments.h,v 1.23 2012/06/16 20:47:04 dsl Exp $ */
/* $NetBSD: segments.h,v 1.24 2013/01/07 17:03:06 chs Exp $ */
/*-
* Copyright (c) 1990 The Regents of the University of California.
@ -374,12 +374,15 @@ void cpu_fsgs_reload(struct lwp *, int, int);
* Strange order because of syscall/sysret insns
*/
#define LSYS5CALLS_SEL 0 /* iBCS system call gate */
#define LUCODE32_SEL 8 /* 32 bit user code descriptor */
#define LUDATA_SEL 16 /* User data descriptor */
#define LUCODE_SEL 24 /* User code descriptor */
/* 8 second half */
#define LSOL26CALLS_SEL 32 /* Solaris 2.6 system call gate */
#define LUDATA32_SEL 56 /* 32 bit user data descriptor (needed?)*/
/* 40 second half */
#define LUCODE32_SEL 48 /* 32 bit user code descriptor */
#define LUDATA_SEL 56 /* User data descriptor */
#define LUCODE_SEL 64 /* User code descriptor */
#define LUDATA32_SEL 72 /* 32 bit user data descriptor (needed?)*/
#define LBSDICALLS_SEL 128 /* BSDI system call gate */
/* 136 second half */
#define LDT_SIZE 144