HelenOS sources

SP                 98 kernel/arch/mips32/src/debug/stacktrace.c 	((0x0 << OP_SHIFT) | (SP << RS_SHIFT) | (R0 << RT_SHIFT) | 0x21)
SP                100 kernel/arch/mips32/src/debug/stacktrace.c 	((0x0 << OP_SHIFT) | (SP << RD_SHIFT) | (R0 << RT_SHIFT) | 0x21)
SP                102 kernel/arch/mips32/src/debug/stacktrace.c 	((0x8 << OP_SHIFT) | (SP << RS_SHIFT) | (SP << RT_SHIFT))
SP                104 kernel/arch/mips32/src/debug/stacktrace.c 	((0x9 << OP_SHIFT) | (SP << RS_SHIFT) | (SP << RT_SHIFT))
SP                138 kernel/arch/mips32/src/debug/stacktrace.c 	unsigned int fp = SP;
SP                211 kernel/arch/mips32/src/debug/stacktrace.c 			if (base == SP || (has_fp && base == fp)) {