| // System calls of the chipformer RV32 machine: putchar is ecall a7 = 1, exit is a7 = 93. | |
| // Built with -DQEMU, putchar becomes write(1, &c, 1) (a7 = 64) for qemu-riscv32 user mode. | |
| static inline long rv_ecall2(long n, long a0, long a1, long a2) { | |
| register long r_a0 __asm__("a0") = a0, r_a1 __asm__("a1") = a1, r_a2 __asm__("a2") = a2; | |
| register long r_a7 __asm__("a7") = n; | |
| __asm__ volatile("ecall" : "+r"(r_a0) : "r"(r_a1), "r"(r_a2), "r"(r_a7) : "memory"); | |
| return r_a0; | |
| } | |
| static inline void rv_putchar(char c) { | |
| rv_ecall2(64, 1, (long)&c, 1); | |
| rv_ecall2(1, (unsigned char)c, 0, 0); | |
| } | |
| static inline void rv_mark(int id) { (void)id; } | |