[PATCH] RISC-V: Using SYS_clock_gettime64 for rv32 libgloss.
Kito Cheng
kito.cheng@sifive.com
Tue Apr 13 09:33:03 GMT 2021
- RISC-V 32 bits linux/glibc didn't provide gettimeofday anymore
after upstream, because RV32 didn't have backward compatible issue,
so RV32 only support 64 bits time related system call.
- So using clock_gettime64 call instead for rv32 libgloss.
---
libgloss/riscv/machine/syscall.h | 1 +
libgloss/riscv/sys_gettimeofday.c | 21 +++++++++++++++++++++
2 files changed, 22 insertions(+)
diff --git a/libgloss/riscv/machine/syscall.h b/libgloss/riscv/machine/syscall.h
index 88b9fdfda..1ac8b1a4b 100644
--- a/libgloss/riscv/machine/syscall.h
+++ b/libgloss/riscv/machine/syscall.h
@@ -44,6 +44,7 @@
#define SYS_munmap 215
#define SYS_mremap 216
#define SYS_mmap 222
+#define SYS_clock_gettime64 403
#define SYS_open 1024
#define SYS_link 1025
#define SYS_unlink 1026
diff --git a/libgloss/riscv/sys_gettimeofday.c b/libgloss/riscv/sys_gettimeofday.c
index daa14e475..81bea8e55 100644
--- a/libgloss/riscv/sys_gettimeofday.c
+++ b/libgloss/riscv/sys_gettimeofday.c
@@ -1,10 +1,31 @@
#include <machine/syscall.h>
#include <sys/time.h>
+#include <stdint.h>
#include "internal_syscall.h"
/* Get the current time. Only relatively correct. */
int
_gettimeofday(struct timeval *tp, void *tzp)
{
+#if __riscv_xlen == 32
+ struct __timespec64
+ {
+ int64_t tv_sec; /* Seconds */
+# if BYTE_ORDER == BIG_ENDIAN
+ int32_t __padding; /* Padding */
+ int32_t tv_nsec; /* Nanoseconds */
+# else
+ int32_t tv_nsec; /* Nanoseconds */
+ int32_t __padding; /* Padding */
+# endif
+ };
+ struct __timespec64 ts64;
+ int rv;
+ rv = syscall_errno (SYS_clock_gettime64, 2, 0, (long)&ts64, 0, 0, 0, 0);
+ tp->tv_sec = ts64.tv_sec;
+ tp->tv_usec = ts64.tv_nsec * 1000;
+ return rv;
+#else
return syscall_errno (SYS_gettimeofday, 1, tp, 0, 0, 0, 0, 0);
+#endif
}
--
2.31.1
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