From b962cd6062a08c063e6b10afaaa930956ee99e2d Mon Sep 17 00:00:00 2001 From: dzwdz Date: Sun, 7 Aug 2022 16:58:42 +0200 Subject: user/libc: preparation for dlmalloc port --- src/user/lib/mman.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) create mode 100644 src/user/lib/mman.c (limited to 'src/user/lib/mman.c') diff --git a/src/user/lib/mman.c b/src/user/lib/mman.c new file mode 100644 index 0000000..b41b8ff --- /dev/null +++ b/src/user/lib/mman.c @@ -0,0 +1,24 @@ +/* mmap() emulation */ +#include +#include +#include + +void *mmap(void *addr, size_t len, int prot, int flags, int fd, off_t off) { + (void)fd; (void) off; + if ((flags & MMAP_UNSUPPORTED) == MMAP_UNSUPPORTED || + (prot & MMAP_UNSUPPORTED) == MMAP_UNSUPPORTED || + !(flags & MAP_ANONYMOUS)) + { + errno = ENOSYS; + return NULL; + } + + void *p = _syscall_memflag(addr, len, MEMFLAG_FINDFREE | MEMFLAG_PRESENT); + if (!p) errno = ENOMEM; + return p; +} + +int munmap(void *addr, size_t len) { + _syscall_memflag(addr, len, 0); + return 0; +} -- cgit v1.2.3