Signed-off-by: Kohei Tokunaga <ktokunaga.m...@gmail.com>
---
util/mmap-alloc.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/util/mmap-alloc.c b/util/mmap-alloc.c
index ed14f9c64d..91f33682e8 100644
--- a/util/mmap-alloc.c
+++ b/util/mmap-alloc.c
@@ -145,6 +145,7 @@ static bool map_noreserve_effective(int fd, uint32_t
qemu_map_flags)
return false;
}
+#ifndef EMSCRIPTEN
/*
* Reserve a new memory region of the requested size to be used for mapping
* from the given fd (if any).
@@ -176,6 +177,7 @@ static void *mmap_reserve(size_t size, int fd)
return mmap(0, size, PROT_NONE, flags, fd, 0);
}
+#endif
/*
* Activate memory in a reserved region from the given fd (if any), to make
@@ -244,6 +246,21 @@ static inline size_t mmap_guard_pagesize(int fd)
#endif
}
+#ifdef EMSCRIPTEN
+void *qemu_ram_mmap(int fd,
+ size_t size,
+ size_t align,
+ uint32_t qemu_map_flags,
+ off_t map_offset)
+{
+ /*
+ * emscripten doesn't support non-zero first argument for mmap so
+ * mmap a larger region without the hint and return an aligned pointer.
+ */
+ void *ptr = mmap_activate(0, size + align, fd, qemu_map_flags, map_offset);
+ return (void *)QEMU_ALIGN_UP((uintptr_t)ptr, align);
+}
+#else
void *qemu_ram_mmap(int fd,
size_t size,
size_t align,
@@ -293,6 +310,7 @@ void *qemu_ram_mmap(int fd,
return ptr;
}
+#endif /* EMSCRIPTEN */
void qemu_ram_munmap(int fd, void *ptr, size_t size)
{
--
2.25.1
