void pt_regs_to_gdb_regs()

in kernel/kgdb.c [37:68]

• 24 lines of code
• 3 McCabe index (conditional complexity)

void pt_regs_to_gdb_regs(unsigned long *gdb_regs, struct pt_regs *regs)
{
	unsigned int i;
	unsigned long *pt_regb = (unsigned long *)regs;
	int temp;

	/* registers r0 - r31, pc, msr, ear, esr, fsr + do not save pt_mode */
	for (i = 0; i < (sizeof(struct pt_regs) / 4) - 1; i++)
		gdb_regs[i] = pt_regb[i];

	/* Branch target register can't be changed */
	__asm__ __volatile__ ("mfs %0, rbtr;" : "=r"(temp) : );
	gdb_regs[GDB_BTR] = temp;

	/* pvr part  - we have 11 pvr regs */
	for (i = 0; i < sizeof(struct pvr_s)/4; i++)
		gdb_regs[GDB_PVR + i] = pvr.pvr[i];

	/* read special registers - can't be changed */
	__asm__ __volatile__ ("mfs %0, redr;" : "=r"(temp) : );
	gdb_regs[GDB_REDR] = temp;
	__asm__ __volatile__ ("mfs %0, rpid;" : "=r"(temp) : );
	gdb_regs[GDB_RPID] = temp;
	__asm__ __volatile__ ("mfs %0, rzpr;" : "=r"(temp) : );
	gdb_regs[GDB_RZPR] = temp;
	__asm__ __volatile__ ("mfs %0, rtlbx;" : "=r"(temp) : );
	gdb_regs[GDB_RTLBX] = temp;
	__asm__ __volatile__ ("mfs %0, rtlblo;" : "=r"(temp) : );
	gdb_regs[GDB_RTLBLO] = temp;
	__asm__ __volatile__ ("mfs %0, rtlbhi;" : "=r"(temp) : );
	gdb_regs[GDB_RTLBHI] = temp;
}