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Save gs register before calling the vm86_old syscall thru int 0x80. This is 

required for linuxthreads as the TLS uses this register to keep track
    of local thread storage (Bugzilla #2431, J. Scott Berg).
This commit is contained in:
Egbert Eich 2005-02-07 18:16:05 +00:00
parent 4d55065b35
commit ea5b09f95d
1 changed files with 8 additions and 2 deletions
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10
hw/xfree86/os-support/linux/int10/vm86/linux_vm86.c
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@ -1,3 +1,5 @@
/* $XFree86$ */
#include "xf86.h" #include "xf86.h"
#include "xf86_OSproc.h" #include "xf86_OSproc.h"
#include "xf86_ansic.h" #include "xf86_ansic.h"
@ -173,7 +175,7 @@ vm86_GP_fault(xf86Int10InfoPtr pInt)
case 0x0f: case 0x0f:
xf86DrvMsg(pInt->scrnIndex, X_ERROR, xf86DrvMsg(pInt->scrnIndex, X_ERROR,
"CPU 0x0f Trap at CS:EIP=0x%4.4x:0x%8.8x\n", X86_CS, X86_EIP); "CPU 0x0f Trap at CS:EIP=0x%4.4x:0x%8.8lx\n", X86_CS, X86_EIP);
goto op0ferr; goto op0ferr;
default: default:
@ -269,14 +271,18 @@ vm86_rep(struct vm86_struct *ptr)
/* When compiling with -fPIC, we can't use asm constraint "b" because /* When compiling with -fPIC, we can't use asm constraint "b" because
%ebx is already taken by gcc. */ %ebx is already taken by gcc. */
__asm__ __volatile__("pushl %%ebx\n\t" __asm__ __volatile__("pushl %%ebx\n\t"
"push %%gs\n\t"
"movl %2,%%ebx\n\t" "movl %2,%%ebx\n\t"
"movl %1,%%eax\n\t" "movl %1,%%eax\n\t"
"int $0x80\n\t" "int $0x80\n\t"
"pop %%gs\n\t"
"popl %%ebx" "popl %%ebx"
:"=a" (__res) :"=a" (__res)
:"n" ((int)113), "r" ((struct vm86_struct *)ptr)); :"n" ((int)113), "r" ((struct vm86_struct *)ptr));
#else #else
__asm__ __volatile__("int $0x80\n\t" __asm__ __volatile__("push %%gs\n\t"
"int $0x80\n\t"
"pop %%gs"
:"=a" (__res):"a" ((int)113), :"=a" (__res):"a" ((int)113),
"b" ((struct vm86_struct *)ptr)); "b" ((struct vm86_struct *)ptr));
#endif #endif