diff options
Diffstat (limited to 'arch/loongarch/kernel/syscall.c')
| -rw-r--r-- | arch/loongarch/kernel/syscall.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/arch/loongarch/kernel/syscall.c b/arch/loongarch/kernel/syscall.c index 168bd97540f8..1249d82c1cd0 100644 --- a/arch/loongarch/kernel/syscall.c +++ b/arch/loongarch/kernel/syscall.c @@ -34,9 +34,22 @@ SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len, unsigned long, return ksys_mmap_pgoff(addr, len, prot, flags, fd, offset >> PAGE_SHIFT); } +SYSCALL_DEFINE6(mmap2, unsigned long, addr, unsigned long, len, unsigned long, + prot, unsigned long, flags, unsigned long, fd, unsigned long, offset) +{ + if (offset & (~PAGE_MASK >> 12)) + return -EINVAL; + + return ksys_mmap_pgoff(addr, len, prot, flags, fd, offset >> (PAGE_SHIFT - 12)); +} + void *sys_call_table[__NR_syscalls] = { [0 ... __NR_syscalls - 1] = sys_ni_syscall, +#ifdef CONFIG_32BIT +#include <asm/syscall_table_32.h> +#else #include <asm/syscall_table_64.h> +#endif }; typedef long (*sys_call_fn)(unsigned long, unsigned long, @@ -75,7 +88,7 @@ void noinstr __no_stack_protector do_syscall(struct pt_regs *regs) * * The resulting 6 bits of entropy is seen in SP[9:4]. */ - choose_random_kstack_offset(drdtime()); + choose_random_kstack_offset(get_cycles()); syscall_exit_to_user_mode(regs); } |