system/qemu
system/qemu
1
0
Fork 0
mirror of https://gitlab.com/qemu-project/qemu synced 2024-07-09 04:27:12 +00:00
Code Issues Projects Releases Wiki Activity

softmmu/physmem: Remap with proper protection in qemu_ram_remap()

Browse Source 
Let's remap with the proper protection that we can derive from
RAM_READONLY.

Message-ID: <20230906120503.359863-5-david@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
This commit is contained in:
David Hildenbrand 2023-09-06 14:04:56 +02:00
parent e92666b0ba
commit 9e6b9f3791
1 changed files with 6 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
softmmu/physmem.c
View File

@ -2069,6 +2069,7 @@ void qemu_ram_remap(ram_addr_t addr, ram_addr_t length)
ram_addr_t offset;
int flags;
void *area, *vaddr;
int prot;
RAMBLOCK_FOREACH(block) {
offset = addr - block->offset;
@ -2083,13 +2084,14 @@ void qemu_ram_remap(ram_addr_t addr, ram_addr_t length)
flags |= block->flags & RAM_SHARED ?
MAP_SHARED : MAP_PRIVATE;
flags |= block->flags & RAM_NORESERVE ? MAP_NORESERVE : 0;
prot = PROT_READ;
prot |= block->flags & RAM_READONLY ? 0 : PROT_WRITE;
if (block->fd >= 0) {
area = mmap(vaddr, length, PROT_READ | PROT_WRITE,
flags, block->fd, offset + block->fd_offset);
area = mmap(vaddr, length, prot, flags, block->fd,
offset + block->fd_offset);
} else {
flags |= MAP_ANONYMOUS;
area = mmap(vaddr, length, PROT_READ | PROT_WRITE,
flags, -1, 0);
area = mmap(vaddr, length, prot, flags, -1, 0);
}
if (area != vaddr) {
error_report("Could not remap addr: "