[xtensa-cvscommit] linux/arch/xtensa/kernel process.c,1.9,1.10 ptrace.c,1.8,1.9

[<ma...@us...>]

Update of /cvsroot/xtensa/linux/arch/xtensa/kernel
In directory sc8-pr-cvs1:/tmp/cvs-serv29532

Modified Files:
	process.c ptrace.c 
Log Message:
Make ptrace and gregset properly reflect user PS value, ie. with PS.EXCM zero.
The fact that PS.EXCM is left set in pt_regs is for convenience and
efficiency of exception handlers, and does not reflect the value of
PS while a user task is running.  Leaving it set in gregset prevents
GDB from doing task tracebacks (which are not done when PS.EXCM is set).



Index: process.c
===================================================================
RCS file: /cvsroot/xtensa/linux/arch/xtensa/kernel/process.c,v
retrieving revision 1.9
retrieving revision 1.10
diff -C2 -d -r1.9 -r1.10
*** process.c	11 Feb 2003 07:19:38 -0000	1.9
--- process.c	14 Feb 2003 18:48:10 -0000	1.10
***************
*** 259,264 ****
   	elfregs->cpuy = i;
  
  	elfregs->pc		= regs->pc;
! 	elfregs->ps		= regs->ps;
  	elfregs->exccause	= regs->exccause;
  	elfregs->excvaddr	= regs->excvaddr;
--- 259,267 ----
   	elfregs->cpuy = i;
  
+ 	/* Note:  PS.EXCM is not set while user task is running; its
+ 	 * being set in regs->ps is for exception handling convenience. */
+ 
  	elfregs->pc		= regs->pc;
! 	elfregs->ps		= (regs->ps & ~XCHAL_PS_EXCM_MASK);
  	elfregs->exccause	= regs->exccause;
  	elfregs->excvaddr	= regs->excvaddr;
***************
*** 307,312 ****
  	int i, wb_offset; /* wb_offset must be signed */
  
  	regs->pc	 = elfregs->pc;
! 	regs->ps	 = elfregs->ps;
  	regs->exccause	 = elfregs->exccause;
  	regs->excvaddr	 = elfregs->excvaddr;
--- 310,318 ----
  	int i, wb_offset; /* wb_offset must be signed */
  
+ 	/* Note:  PS.EXCM is not set while user task is running; it
+ 	 * needs to be set in regs->ps is for exception handling convenience. */
+ 
  	regs->pc	 = elfregs->pc;
! 	regs->ps	 = (elfregs->ps | XCHAL_PS_EXCM_MASK);
  	regs->exccause	 = elfregs->exccause;
  	regs->excvaddr	 = elfregs->excvaddr;

Index: ptrace.c
===================================================================
RCS file: /cvsroot/xtensa/linux/arch/xtensa/kernel/ptrace.c,v
retrieving revision 1.8
retrieving revision 1.9
diff -C2 -d -r1.8 -r1.9
*** ptrace.c	7 Feb 2003 02:03:35 -0000	1.8
--- ptrace.c	14 Feb 2003 18:48:10 -0000	1.9
***************
*** 197,201 ****
  			break;
  		case REG_PS:
! 			tmp = regs->ps;
  			break;
  		case REG_WB:
--- 197,203 ----
  			break;
  		case REG_PS:
! 			/* Note:  PS.EXCM is not set while user task is running;
! 			 * its being set in regs is for exception handling convenience.  */
! 			tmp = (regs->ps & ~XCHAL_PS_EXCM_MASK);
  			break;
  		case REG_WB: