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Diff for /src/sys/arch/i386/i386/locore.S between version 1.47.4.1 and 1.47.4.2

version 1.47.4.1, 2007/05/27 12:27:30 version 1.47.4.2, 2007/06/17 21:30:36
Line 705  ENTRY(longjmp)
Line 705  ENTRY(longjmp)
         ret          ret
   
 /*  /*
  * struct lwp *cpu_switchto(struct lwp *oldlwp, struct newlwp)   * struct lwp *cpu_switchto(struct lwp *oldlwp, struct newlwp,
    *                          bool returning)
  *   *
  *      1. if (oldlwp != NULL), save its context.   *      1. if (oldlwp != NULL), save its context.
  *      2. then, restore context of newlwp.   *      2. then, restore context of newlwp.
Line 721  ENTRY(cpu_switchto)
Line 722  ENTRY(cpu_switchto)
   
         movl    16(%esp),%esi           # oldlwp          movl    16(%esp),%esi           # oldlwp
         movl    20(%esp),%edi           # newlwp          movl    20(%esp),%edi           # newlwp
           movl    24(%esp),%edx           # returning
         testl   %esi,%esi          testl   %esi,%esi
         jz      1f          jz      1f
   
Line 734  ENTRY(cpu_switchto)
Line 736  ENTRY(cpu_switchto)
         movl    PCB_EBP(%ebx),%ebp          movl    PCB_EBP(%ebx),%ebp
         movl    PCB_ESP(%ebx),%esp          movl    PCB_ESP(%ebx),%esp
   
           /* Set curlwp. */
           movl    %edi,CPUVAR(CURLWP)
   
           /* Skip the rest if returning to a pinned LWP. */
           testl   %edx,%edx
           jnz     4f
   
         /* Switch TSS.  Reset "task busy" flag before loading. */          /* Switch TSS.  Reset "task busy" flag before loading. */
         movl    %cr3,%eax          movl    %cr3,%eax
         movl    %eax,PCB_CR3(%ebx)      # for TSS gates          movl    %eax,PCB_CR3(%ebx)      # for TSS gates
Line 742  ENTRY(cpu_switchto)
Line 751  ENTRY(cpu_switchto)
         andl    $~0x0200,4(%eax,%edx, 1)          andl    $~0x0200,4(%eax,%edx, 1)
         ltr     %dx          ltr     %dx
   
         /* Set curlwp. */  
         movl    %edi,CPUVAR(CURLWP)  
   
         /* Don't bother with the rest if switching to a system process. */          /* Don't bother with the rest if switching to a system process. */
         testl   $LW_SYSTEM,L_FLAG(%edi)          testl   $LW_SYSTEM,L_FLAG(%edi)
         jnz     4f          jnz     4f

Legend:
Removed from v.1.47.4.1  
changed lines
  Added in v.1.47.4.2

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