+// See LICENSE for license details.
+
#include <stdint.h>
#include <string.h>
#include <stdarg.h>
#include <stdio.h>
#include <limits.h>
-#include <machine/syscall.h>
-#include "encoding.h"
+#include <sys/signal.h>
+#include "util.h"
+
+#define SYS_write 64
+
+#undef strcmp
-#define static_assert(cond) switch(0) { case 0: case !!(long)(cond): ; }
+extern volatile uint64_t tohost;
+extern volatile uint64_t fromhost;
-void syscall(long which, long arg0, long arg1, long arg2)
+static uintptr_t syscall(uintptr_t which, uint64_t arg0, uint64_t arg1, uint64_t arg2)
{
volatile uint64_t magic_mem[8] __attribute__((aligned(64)));
magic_mem[0] = which;
magic_mem[2] = arg1;
magic_mem[3] = arg2;
__sync_synchronize();
- write_csr(tohost, (long)magic_mem);
- while (swap_csr(fromhost, 0) == 0);
-}
-void exit(int code)
-{
- write_csr(tohost, (code << 1) | 1);
- while (1);
-}
+ tohost = (uintptr_t)magic_mem;
+ while (fromhost == 0)
+ ;
+ fromhost = 0;
-void printstr(const char* s)
-{
- syscall(SYS_write, 1, (long)s, strlen(s));
+ __sync_synchronize();
+ return magic_mem[0];
}
-// In setStats, we might trap reading uarch-specific counters.
-// The trap handler will skip over the instruction, but we want
-// to pretend as though we read the value 0 in this case.
-#define read_csr_safe(reg) ({ long __tmp = 0; \
- asm volatile ("csrr %0, " #reg : "+r"(__tmp)); \
- __tmp; })
-
-#define NUM_COUNTERS 18
-static long counters[NUM_COUNTERS];
+#define NUM_COUNTERS 2
+static uintptr_t counters[NUM_COUNTERS];
static char* counter_names[NUM_COUNTERS];
+
void setStats(int enable)
{
int i = 0;
#define READ_CTR(name) do { \
- if (i >= NUM_COUNTERS) exit(-1); \
- long csr = read_csr_safe(name); \
+ while (i >= NUM_COUNTERS) ; \
+ uintptr_t csr = read_csr(name); \
if (!enable) { csr -= counters[i]; counter_names[i] = #name; } \
counters[i++] = csr; \
} while (0)
- READ_CTR(cycle); READ_CTR(instret);
- READ_CTR(uarch0); READ_CTR(uarch1); READ_CTR(uarch2); READ_CTR(uarch3);
- READ_CTR(uarch4); READ_CTR(uarch5); READ_CTR(uarch6); READ_CTR(uarch7);
- READ_CTR(uarch8); READ_CTR(uarch9); READ_CTR(uarch10); READ_CTR(uarch11);
- READ_CTR(uarch12); READ_CTR(uarch13); READ_CTR(uarch14); READ_CTR(uarch15);
+
+ READ_CTR(mcycle);
+ READ_CTR(minstret);
+
#undef READ_CTR
}
+void __attribute__((noreturn)) tohost_exit(uintptr_t code)
+{
+ tohost = (code << 1) | 1;
+ while (1);
+}
+
+uintptr_t __attribute__((weak)) handle_trap(uintptr_t cause, uintptr_t epc, uintptr_t regs[32])
+{
+ tohost_exit(1337);
+}
+
+void exit(int code)
+{
+ tohost_exit(code);
+}
+
+void abort()
+{
+ exit(128 + SIGABRT);
+}
+
+void printstr(const char* s)
+{
+ syscall(SYS_write, 1, (uintptr_t)s, strlen(s));
+}
+
void __attribute__((weak)) thread_entry(int cid, int nc)
{
// multi-threaded programs override this function.
return -1;
}
+static void init_tls()
+{
+ register void* thread_pointer asm("tp");
+ extern char _tls_data;
+ extern __thread char _tdata_begin, _tdata_end, _tbss_end;
+ size_t tdata_size = &_tdata_end - &_tdata_begin;
+ memcpy(thread_pointer, &_tls_data, tdata_size);
+ size_t tbss_size = &_tbss_end - &_tdata_end;
+ memset(thread_pointer + tdata_size, 0, tbss_size);
+}
+
void _init(int cid, int nc)
{
+ init_tls();
thread_entry(cid, nc);
// only single-threaded programs should ever get here.
#undef putchar
int putchar(int ch)
{
- static char buf[64] __attribute__((aligned(64)));
- static int buflen = 0;
+ static __thread char buf[64] __attribute__((aligned(64)));
+ static __thread int buflen = 0;
buf[buflen++] = ch;
if (ch == '\n' || buflen == sizeof(buf))
{
- syscall(SYS_write, 1, (long)buf, buflen);
+ syscall(SYS_write, 1, (uintptr_t)buf, buflen);
buflen = 0;
}
va_end(ap);
return str - str0;
}
+
+void* memcpy(void* dest, const void* src, size_t len)
+{
+ if ((((uintptr_t)dest | (uintptr_t)src | len) & (sizeof(uintptr_t)-1)) == 0) {
+ const uintptr_t* s = src;
+ uintptr_t *d = dest;
+ while (d < (uintptr_t*)(dest + len))
+ *d++ = *s++;
+ } else {
+ const char* s = src;
+ char *d = dest;
+ while (d < (char*)(dest + len))
+ *d++ = *s++;
+ }
+ return dest;
+}
+
+void* memset(void* dest, int byte, size_t len)
+{
+ if ((((uintptr_t)dest | len) & (sizeof(uintptr_t)-1)) == 0) {
+ uintptr_t word = byte & 0xFF;
+ word |= word << 8;
+ word |= word << 16;
+ word |= word << 16 << 16;
+
+ uintptr_t *d = dest;
+ while (d < (uintptr_t*)(dest + len))
+ *d++ = word;
+ } else {
+ char *d = dest;
+ while (d < (char*)(dest + len))
+ *d++ = byte;
+ }
+ return dest;
+}
+
+size_t strlen(const char *s)
+{
+ const char *p = s;
+ while (*p)
+ p++;
+ return p - s;
+}
+
+size_t strnlen(const char *s, size_t n)
+{
+ const char *p = s;
+ while (n-- && *p)
+ p++;
+ return p - s;
+}
+
+int strcmp(const char* s1, const char* s2)
+{
+ unsigned char c1, c2;
+
+ do {
+ c1 = *s1++;
+ c2 = *s2++;
+ } while (c1 != 0 && c1 == c2);
+
+ return c1 - c2;
+}
+
+char* strcpy(char* dest, const char* src)
+{
+ char* d = dest;
+ while ((*d++ = *src++))
+ ;
+ return dest;
+}
+
+long atol(const char* str)
+{
+ long res = 0;
+ int sign = 0;
+
+ while (*str == ' ')
+ str++;
+
+ if (*str == '-' || *str == '+') {
+ sign = *str == '-';
+ str++;
+ }
+
+ while (*str) {
+ res *= 10;
+ res += *str++ - '0';
+ }
+
+ return sign ? -res : res;
+}
projects / riscv-tests.git / blobdiff