35 	unsigned long a1 = regs->areg[1];  in xtensa_backtrace_user()  local
44 	frame.sp = a1;  in xtensa_backtrace_user()
73 			/* Get the PC from a0 and a1. */  in xtensa_backtrace_user()
75 			/* Read a0 and a1 from the  in xtensa_backtrace_user()
79 			a1 = regs->areg[index * 4 + 1];  in xtensa_backtrace_user()
82 			frame.sp = a1;  in xtensa_backtrace_user()
95 	/* Start from the a1 register. */  in xtensa_backtrace_user()
96 	/* a1 = regs->areg[1]; */  in xtensa_backtrace_user()
101 		if (!access_ok(&SPILL_SLOT(a1, 0), 8))  in xtensa_backtrace_user()
103 		/* Copy a1, a0 from user space stack frame. */  in xtensa_backtrace_user()
104 		if (__get_user(a0, &SPILL_SLOT(a1, 0)) ||  in xtensa_backtrace_user()
105 		    __get_user(a1, &SPILL_SLOT(a1, 1)))  in xtensa_backtrace_user()
109 		frame.sp = a1;  in xtensa_backtrace_user()
126 	unsigned long a1 = regs->areg[1];  in xtensa_backtrace_kernel()  local
128 	sp_start = a1 & ~(THREAD_SIZE - 1);  in xtensa_backtrace_kernel()
135 	 * from the a0 and a1 registers saved there.  in xtensa_backtrace_kernel()
137 	while (a1 > sp_start && a1 < sp_end && depth--) {  in xtensa_backtrace_kernel()
141 		frame.sp = a1;  in xtensa_backtrace_kernel()
147 			regs = (struct pt_regs *)a1;  in xtensa_backtrace_kernel()
155 			a1 = regs->areg[1];  in xtensa_backtrace_kernel()
159 		sp_start = a1;  in xtensa_backtrace_kernel()
162 		a0 = SPILL_SLOT(a1, 0);  in xtensa_backtrace_kernel()
163 		a1 = SPILL_SLOT(a1, 1);  in xtensa_backtrace_kernel()
174 	unsigned long a0, a1;  in walk_stackframe()  local
177 	a1 = (unsigned long)sp;  in walk_stackframe()
178 	sp_end = ALIGN(a1, THREAD_SIZE);  in walk_stackframe()
182 	while (a1 < sp_end) {  in walk_stackframe()
185 		sp = (unsigned long *)a1;  in walk_stackframe()
187 		a0 = SPILL_SLOT(a1, 0);  in walk_stackframe()
188 		a1 = SPILL_SLOT(a1, 1);  in walk_stackframe()
190 		if (a1 <= (unsigned long)sp)  in walk_stackframe()
194 		frame.sp = a1;  in walk_stackframe()