mirrors/Astral
1
0
Fork 0
mirror of https://github.com/Mathewnd/Astral.git synced 2026-11-01 15:08:21 +00:00
Code Issues Packages Projects Releases Wiki Activity

mmap: properly support files

Browse Source
This commit is contained in:
Matheus
2023-07-10 21:16:40 -03:00
parent 2f14b61b72
commit 2c62b1a7d8
1 changed files with 21 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files
kernel-src/sys/syscalls/mmap.c
+21 -3
View File
@@ -40,16 +40,30 @@ syscallret_t syscall_mmap(context_t *context, void *hint, size_t len, int prot,
if ((prot & PROT_EXEC) == 0) if ((prot & PROT_EXEC) == 0)
mmuflags |= ARCH_MMU_FLAGS_NOEXEC; mmuflags |= ARCH_MMU_FLAGS_NOEXEC;
bool file = (flags & MAP_ANONYMOUS) == 0; bool isfile = (flags & MAP_ANONYMOUS) == 0;
int vmmflags = 0; int vmmflags = 0;
// XXX this isn't the correct behaviour for MAP_FIXED // XXX this isn't the correct behaviour for MAP_FIXED
if (flags & MAP_FIXED) if (flags & MAP_FIXED)
vmmflags |= VMM_FLAGS_EXACT; vmmflags |= VMM_FLAGS_EXACT;
if ((flags & MAP_PRIVATE) == 0)
vmmflags |= VMM_FLAGS_FILE;
if (flags & MAP_SHARED)
vmmflags |= VMM_FLAGS_SHARED;
vmmfiledesc_t vfd; vmmfiledesc_t vfd;
// TODO file mappings file_t *file = NULL;
__assert(file == false); if (isfile) {
file = fd_get(fd);
if (file == NULL) {
ret.errno = EBADF;
return ret;
}
vfd.node = file->vnode;
vfd.offset = offset;
}
if (hint < USERSPACE_START) if (hint < USERSPACE_START)
hint = USERSPACE_START; hint = USERSPACE_START;
@@ -57,5 +71,9 @@ syscallret_t syscall_mmap(context_t *context, void *hint, size_t len, int prot,
ret.ret = (uint64_t)vmm_map(hint, len, vmmflags, mmuflags, &vfd); ret.ret = (uint64_t)vmm_map(hint, len, vmmflags, mmuflags, &vfd);
if (ret.ret == 0) if (ret.ret == 0)
ret.errno = ENOMEM; ret.errno = ENOMEM;
if (isfile)
fd_release(file);
return ret; return ret;
} }