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riscv: linux: Add support for getrandom vDSO 

Linux kernel >= 6.16 has getrandom() in vDSO for RISC-V.  Enable the use
of it in Glibc so it would benefit the programs using the Glibc high
quality random number functions.

Link: https://git.kernel.org/torvalds/c/ee0d03053e70
Signed-off-by: Xi Ruoyao <xry111@xry111.site>
Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
This commit is contained in:
Xi Ruoyao 2025-06-20 00:25:32 +08:00 committed by Adhemerval Zanella
parent 47b577c66f
commit fc6f074e04
1 changed files with 2 additions and 1 deletions
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3
sysdeps/unix/sysv/linux/riscv/sysdep.h
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@ -145,11 +145,12 @@
# define HAVE_CLOCK_GETRES64_VSYSCALL "__vdso_clock_getres"
# define HAVE_CLOCK_GETTIME64_VSYSCALL "__vdso_clock_gettime"
# define HAVE_GETTIMEOFDAY_VSYSCALL "__vdso_gettimeofday"
# define HAVE_GETRANDOM_VSYSCALL "__vdso_getrandom"
# else
# define VDSO_NAME "LINUX_5.4"
# define VDSO_HASH 61765876
/* RV32 does not support the gettime VDSO syscalls. */
/* RV32 does not support the gettime and getrandom VDSO syscalls. */
# endif
# define HAVE_CLONE3_WRAPPER 1