Clean out the leftovers from the i386_set_gsbase() TLS conversion.
Like on libthr, there is an i386_set_gsbase() stub implementation here to avoid libc.so.5 issues. This should likely be a weak symbol and I expect this will be fixed soon. Approved by: re
This commit is contained in:
parent
e55a0cd805
commit
3b4399f6a7
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=147673
@ -28,28 +28,11 @@
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#include <string.h>
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#include <stdint.h>
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#include <machine/segments.h>
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#include <machine/sysarch.h>
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void
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_set_tp(void *tp)
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{
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union descriptor ldt;
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int error, sel;
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error = i386_set_gsbase(tp);
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if (error == 0)
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return;
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memset(&ldt, 0, sizeof(ldt));
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ldt.sd.sd_lolimit = 0xffff; /* 4G limit */
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ldt.sd.sd_lobase = ((uintptr_t)tp) & 0xffffff;
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ldt.sd.sd_type = SDT_MEMRWA;
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ldt.sd.sd_dpl = SEL_UPL;
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ldt.sd.sd_p = 1; /* present */
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ldt.sd.sd_hilimit = 0xf; /* 4G limit */
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ldt.sd.sd_def32 = 1; /* 32 bit */
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ldt.sd.sd_gran = 1; /* limit in pages */
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ldt.sd.sd_hibase = (((uintptr_t)tp) >> 24) & 0xff;
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sel = i386_set_ldt(LDT_AUTO_ALLOC, &ldt, 1);
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__asm __volatile("movl %0,%%gs" : : "rm" ((sel << 3) | 7));
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i386_set_gsbase(tp);
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}
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@ -30,7 +30,6 @@ __FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <machine/cpufunc.h>
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#include <machine/segments.h>
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#include <machine/sysarch.h>
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#include <unistd.h>
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@ -42,8 +41,6 @@ __FBSDID("$FreeBSD$");
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#include "rtld_tls.h"
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#include "pthread_md.h"
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int _thr_using_setbase;
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struct tcb *
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_tcb_ctor(struct pthread *thread, int initial)
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{
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@ -78,46 +75,14 @@ _tcb_dtor(struct tcb *tcb)
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struct kcb *
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_kcb_ctor(struct kse *kse)
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{
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union descriptor ldt;
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void *base;
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struct kcb *kcb;
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int error;
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kcb = malloc(sizeof(struct kcb));
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if (kcb != NULL) {
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bzero(kcb, sizeof(struct kcb));
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kcb->kcb_self = kcb;
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kcb->kcb_kse = kse;
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switch (_thr_using_setbase) {
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case 1: /* use i386_set_gsbase() in _kcb_set */
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kcb->kcb_ldt = -1;
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break;
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case 0: /* Untested, try the get/set_gsbase routines once */
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error = i386_get_gsbase(&base);
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if (error == 0) {
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_thr_using_setbase = 1;
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break;
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}
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/* fall through */
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case 2: /* Use the user_ldt code, we must have an old kernel */
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_thr_using_setbase = 2;
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ldt.sd.sd_hibase = (unsigned int)kcb >> 24;
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ldt.sd.sd_lobase = (unsigned int)kcb & 0xFFFFFF;
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ldt.sd.sd_hilimit = (sizeof(struct kcb) >> 16) & 0xF;
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ldt.sd.sd_lolimit = sizeof(struct kcb) & 0xFFFF;
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ldt.sd.sd_type = SDT_MEMRWA;
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ldt.sd.sd_dpl = SEL_UPL;
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ldt.sd.sd_p = 1;
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ldt.sd.sd_xx = 0;
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ldt.sd.sd_def32 = 1;
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ldt.sd.sd_gran = 0; /* no more than 1M */
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kcb->kcb_ldt = i386_set_ldt(LDT_AUTO_ALLOC, &ldt, 1);
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if (kcb->kcb_ldt < 0) {
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free(kcb);
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return (NULL);
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}
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break;
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}
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}
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return (kcb);
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}
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@ -125,9 +90,12 @@ _kcb_ctor(struct kse *kse)
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void
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_kcb_dtor(struct kcb *kcb)
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{
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if (kcb->kcb_ldt >= 0) {
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i386_set_ldt(kcb->kcb_ldt, NULL, 1);
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kcb->kcb_ldt = -1; /* just in case */
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}
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free(kcb);
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}
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int
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i386_set_gsbase(void *addr)
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{
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return (sysarch(I386_SET_GSBASE, &addr));
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}
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@ -40,8 +40,6 @@
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extern int _thr_setcontext(mcontext_t *, intptr_t, intptr_t *);
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extern int _thr_getcontext(mcontext_t *);
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extern int _thr_using_setbase;
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#define KSE_STACKSIZE 16384
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#define DTV_OFFSET offsetof(struct tcb, tcb_dtv)
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@ -60,7 +58,6 @@ struct pthread;
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struct kcb {
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struct tcb *kcb_curtcb;
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struct kcb *kcb_self; /* self reference */
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int kcb_ldt;
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struct kse *kcb_kse;
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struct kse_mailbox kcb_kmbx;
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};
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@ -154,15 +151,7 @@ void _kcb_dtor(struct kcb *);
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static __inline void
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_kcb_set(struct kcb *kcb)
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{
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int val;
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if (_thr_using_setbase == 1) {
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i386_set_gsbase(kcb);
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} else {
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val = (kcb->kcb_ldt << 3) | 7;
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__asm __volatile("movl %0, %%gs" : : "r" (val));
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}
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i386_set_gsbase(kcb);
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}
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/* Get the current kcb. */
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@ -30,7 +30,6 @@ __FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <machine/cpufunc.h>
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#include <machine/segments.h>
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#include <machine/sysarch.h>
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#include <unistd.h>
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@ -42,8 +41,6 @@ __FBSDID("$FreeBSD$");
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#include "rtld_tls.h"
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#include "pthread_md.h"
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int _thr_using_setbase;
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struct tcb *
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_tcb_ctor(struct pthread *thread, int initial)
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{
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@ -78,46 +75,14 @@ _tcb_dtor(struct tcb *tcb)
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struct kcb *
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_kcb_ctor(struct kse *kse)
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{
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union descriptor ldt;
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void *base;
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struct kcb *kcb;
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int error;
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kcb = malloc(sizeof(struct kcb));
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if (kcb != NULL) {
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bzero(kcb, sizeof(struct kcb));
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kcb->kcb_self = kcb;
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kcb->kcb_kse = kse;
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switch (_thr_using_setbase) {
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case 1: /* use i386_set_gsbase() in _kcb_set */
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kcb->kcb_ldt = -1;
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break;
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case 0: /* Untested, try the get/set_gsbase routines once */
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error = i386_get_gsbase(&base);
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if (error == 0) {
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_thr_using_setbase = 1;
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break;
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}
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/* fall through */
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case 2: /* Use the user_ldt code, we must have an old kernel */
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_thr_using_setbase = 2;
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ldt.sd.sd_hibase = (unsigned int)kcb >> 24;
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ldt.sd.sd_lobase = (unsigned int)kcb & 0xFFFFFF;
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ldt.sd.sd_hilimit = (sizeof(struct kcb) >> 16) & 0xF;
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ldt.sd.sd_lolimit = sizeof(struct kcb) & 0xFFFF;
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ldt.sd.sd_type = SDT_MEMRWA;
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ldt.sd.sd_dpl = SEL_UPL;
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ldt.sd.sd_p = 1;
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ldt.sd.sd_xx = 0;
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ldt.sd.sd_def32 = 1;
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ldt.sd.sd_gran = 0; /* no more than 1M */
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kcb->kcb_ldt = i386_set_ldt(LDT_AUTO_ALLOC, &ldt, 1);
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if (kcb->kcb_ldt < 0) {
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free(kcb);
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return (NULL);
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}
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break;
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}
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}
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return (kcb);
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}
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@ -125,9 +90,12 @@ _kcb_ctor(struct kse *kse)
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void
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_kcb_dtor(struct kcb *kcb)
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{
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if (kcb->kcb_ldt >= 0) {
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i386_set_ldt(kcb->kcb_ldt, NULL, 1);
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kcb->kcb_ldt = -1; /* just in case */
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}
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free(kcb);
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}
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int
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i386_set_gsbase(void *addr)
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{
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return (sysarch(I386_SET_GSBASE, &addr));
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}
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@ -40,8 +40,6 @@
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extern int _thr_setcontext(mcontext_t *, intptr_t, intptr_t *);
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extern int _thr_getcontext(mcontext_t *);
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extern int _thr_using_setbase;
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#define KSE_STACKSIZE 16384
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#define DTV_OFFSET offsetof(struct tcb, tcb_dtv)
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@ -60,7 +58,6 @@ struct pthread;
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struct kcb {
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struct tcb *kcb_curtcb;
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struct kcb *kcb_self; /* self reference */
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int kcb_ldt;
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struct kse *kcb_kse;
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struct kse_mailbox kcb_kmbx;
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};
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@ -154,15 +151,7 @@ void _kcb_dtor(struct kcb *);
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static __inline void
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_kcb_set(struct kcb *kcb)
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{
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int val;
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if (_thr_using_setbase == 1) {
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i386_set_gsbase(kcb);
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} else {
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val = (kcb->kcb_ldt << 3) | 7;
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__asm __volatile("movl %0, %%gs" : : "r" (val));
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}
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i386_set_gsbase(kcb);
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}
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/* Get the current kcb. */
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@ -327,8 +327,6 @@ void
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allocate_initial_tls(Obj_Entry *objs)
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{
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void* tls;
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union descriptor ldt;
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int error, sel;
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/*
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* Fix the size of the static TLS block by using the maximum
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@ -337,21 +335,7 @@ allocate_initial_tls(Obj_Entry *objs)
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*/
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tls_static_space = tls_last_offset + RTLD_STATIC_TLS_EXTRA;
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tls = allocate_tls(objs, NULL, 2*sizeof(Elf_Addr), sizeof(Elf_Addr));
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error = i386_set_gsbase(tls);
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if (error < 0) {
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memset(&ldt, 0, sizeof(ldt));
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ldt.sd.sd_lolimit = 0xffff; /* 4G limit */
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ldt.sd.sd_lobase = ((Elf_Addr)tls) & 0xffffff;
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ldt.sd.sd_type = SDT_MEMRWA;
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ldt.sd.sd_dpl = SEL_UPL;
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ldt.sd.sd_p = 1; /* present */
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ldt.sd.sd_hilimit = 0xf; /* 4G limit */
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ldt.sd.sd_def32 = 1; /* 32 bit */
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ldt.sd.sd_gran = 1; /* limit in pages */
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ldt.sd.sd_hibase = (((Elf_Addr)tls) >> 24) & 0xff;
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sel = i386_set_ldt(LDT_AUTO_ALLOC, &ldt, 1);
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__asm __volatile("movl %0,%%gs" : : "rm" ((sel << 3) | 7));
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}
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i386_set_gsbase(tls);
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}
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/* GNU ABI */
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