From 9e6d5a03d4e9ba7e9c383e82b51e51a6de0baa5b Mon Sep 17 00:00:00 2001
From: Peter Wemm <peter@FreeBSD.org>
Date: Sat, 6 Nov 2004 03:35:51 +0000
Subject: [PATCH] i386_set_ldt() is not available when running 32 bit binaries
 on amd64 kernels.  Use the recently exposed direct-set routines instead. 
 This is only activated for when we compile i386 support libraries on amd64.

---
 lib/libkse/arch/i386/i386/pthread_md.c        | 6 ++++++
 lib/libkse/arch/i386/include/pthread_md.h     | 7 +++++++
 lib/libpthread/arch/i386/i386/pthread_md.c    | 6 ++++++
 lib/libpthread/arch/i386/include/pthread_md.h | 7 +++++++
 4 files changed, 26 insertions(+)

diff --git a/lib/libkse/arch/i386/i386/pthread_md.c b/lib/libkse/arch/i386/i386/pthread_md.c
index 3d9bd368f109..cca433995ebb 100644
--- a/lib/libkse/arch/i386/i386/pthread_md.c
+++ b/lib/libkse/arch/i386/i386/pthread_md.c
@@ -76,7 +76,9 @@ _tcb_dtor(struct tcb *tcb)
 struct kcb *
 _kcb_ctor(struct kse *kse)
 {
+#ifndef COMPAT_32BIT
 	union descriptor ldt;
+#endif
 	struct kcb *kcb;
 
 	kcb = malloc(sizeof(struct kcb));
@@ -84,6 +86,7 @@ _kcb_ctor(struct kse *kse)
 		bzero(kcb, sizeof(struct kcb));
 		kcb->kcb_self = kcb;
 		kcb->kcb_kse = kse;
+#ifndef COMPAT_32BIT
 		ldt.sd.sd_hibase = (unsigned int)kcb >> 24;
 		ldt.sd.sd_lobase = (unsigned int)kcb & 0xFFFFFF;
 		ldt.sd.sd_hilimit = (sizeof(struct kcb) >> 16) & 0xF;
@@ -99,6 +102,7 @@ _kcb_ctor(struct kse *kse)
 			free(kcb);
 			return (NULL);
 		}
+#endif
 	}
 	return (kcb);
 }
@@ -106,9 +110,11 @@ _kcb_ctor(struct kse *kse)
 void
 _kcb_dtor(struct kcb *kcb)
 {
+#ifndef COMPAT_32BIT
 	if (kcb->kcb_ldt >= 0) {
 		i386_set_ldt(kcb->kcb_ldt, NULL, 1);
 		kcb->kcb_ldt = -1;	/* just in case */
 	}
+#endif
 	free(kcb);
 }
diff --git a/lib/libkse/arch/i386/include/pthread_md.h b/lib/libkse/arch/i386/include/pthread_md.h
index da97c5c09bef..92d4275d44b2 100644
--- a/lib/libkse/arch/i386/include/pthread_md.h
+++ b/lib/libkse/arch/i386/include/pthread_md.h
@@ -32,7 +32,9 @@
 #define	_PTHREAD_MD_H_
 
 #include <stddef.h>
+#include <sys/types.h>
 #include <sys/kse.h>
+#include <machine/sysarch.h>
 #include <ucontext.h>
 
 extern int _thr_setcontext(mcontext_t *, intptr_t, intptr_t *);
@@ -150,10 +152,15 @@ void		_kcb_dtor(struct kcb *);
 static __inline void
 _kcb_set(struct kcb *kcb)
 {
+#ifndef COMPAT_32BIT
 	int val;
 
 	val = (kcb->kcb_ldt << 3) | 7;
 	__asm __volatile("movl %0, %%gs" : : "r" (val));
+#else
+	_amd64_set_gsbase(kcb);
+#endif
+
 }
 
 /* Get the current kcb. */
diff --git a/lib/libpthread/arch/i386/i386/pthread_md.c b/lib/libpthread/arch/i386/i386/pthread_md.c
index 3d9bd368f109..cca433995ebb 100644
--- a/lib/libpthread/arch/i386/i386/pthread_md.c
+++ b/lib/libpthread/arch/i386/i386/pthread_md.c
@@ -76,7 +76,9 @@ _tcb_dtor(struct tcb *tcb)
 struct kcb *
 _kcb_ctor(struct kse *kse)
 {
+#ifndef COMPAT_32BIT
 	union descriptor ldt;
+#endif
 	struct kcb *kcb;
 
 	kcb = malloc(sizeof(struct kcb));
@@ -84,6 +86,7 @@ _kcb_ctor(struct kse *kse)
 		bzero(kcb, sizeof(struct kcb));
 		kcb->kcb_self = kcb;
 		kcb->kcb_kse = kse;
+#ifndef COMPAT_32BIT
 		ldt.sd.sd_hibase = (unsigned int)kcb >> 24;
 		ldt.sd.sd_lobase = (unsigned int)kcb & 0xFFFFFF;
 		ldt.sd.sd_hilimit = (sizeof(struct kcb) >> 16) & 0xF;
@@ -99,6 +102,7 @@ _kcb_ctor(struct kse *kse)
 			free(kcb);
 			return (NULL);
 		}
+#endif
 	}
 	return (kcb);
 }
@@ -106,9 +110,11 @@ _kcb_ctor(struct kse *kse)
 void
 _kcb_dtor(struct kcb *kcb)
 {
+#ifndef COMPAT_32BIT
 	if (kcb->kcb_ldt >= 0) {
 		i386_set_ldt(kcb->kcb_ldt, NULL, 1);
 		kcb->kcb_ldt = -1;	/* just in case */
 	}
+#endif
 	free(kcb);
 }
diff --git a/lib/libpthread/arch/i386/include/pthread_md.h b/lib/libpthread/arch/i386/include/pthread_md.h
index da97c5c09bef..92d4275d44b2 100644
--- a/lib/libpthread/arch/i386/include/pthread_md.h
+++ b/lib/libpthread/arch/i386/include/pthread_md.h
@@ -32,7 +32,9 @@
 #define	_PTHREAD_MD_H_
 
 #include <stddef.h>
+#include <sys/types.h>
 #include <sys/kse.h>
+#include <machine/sysarch.h>
 #include <ucontext.h>
 
 extern int _thr_setcontext(mcontext_t *, intptr_t, intptr_t *);
@@ -150,10 +152,15 @@ void		_kcb_dtor(struct kcb *);
 static __inline void
 _kcb_set(struct kcb *kcb)
 {
+#ifndef COMPAT_32BIT
 	int val;
 
 	val = (kcb->kcb_ldt << 3) | 7;
 	__asm __volatile("movl %0, %%gs" : : "r" (val));
+#else
+	_amd64_set_gsbase(kcb);
+#endif
+
 }
 
 /* Get the current kcb. */