1 files changed, 60 insertions, 0 deletions

diff --git a/meta/recipes-devtools/qemu/qemu/4a8579ad8629b57a43daa62e46cc7af6e1078116.patch b/meta/recipes-devtools/qemu/qemu/4a8579ad8629b57a43daa62e46cc7af6e1078116.patch
new file mode 100644
index 0000000000..5ad859ebe6
--- /dev/null
+++ b/meta/recipes-devtools/qemu/qemu/4a8579ad8629b57a43daa62e46cc7af6e1078116.patch
@@ -0,0 +1,60 @@
+From 4a8579ad8629b57a43daa62e46cc7af6e1078116 Mon Sep 17 00:00:00 2001
+From: Richard Henderson <richard.henderson@linaro.org>
+Date: Tue, 13 Feb 2024 10:20:27 -1000
+Subject: [PATCH] linux-user: Split out do_munmap
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Upstream-Status: Submitted [https://gitlab.com/rth7680/qemu/-/commit/4a8579ad8629b57a43daa62e46cc7af6e1078116]
+
+Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
+Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
+---
+ linux-user/mmap.c | 23 ++++++++++++++++-------
+ 1 file changed, 16 insertions(+), 7 deletions(-)
+
+diff --git a/linux-user/mmap.c b/linux-user/mmap.c
+index 1bbfeb25b14..8ebcca44444 100644
+--- a/linux-user/mmap.c
++++ b/linux-user/mmap.c
+@@ -267,6 +267,21 @@ int target_mprotect(abi_ulong start, abi_ulong len, int target_prot)
+     return ret;
+ }
+ 
++/*
++ * Perform munmap on behalf of the target, with host parameters.
++ * If reserved_va, we must replace the memory reservation.
++ */
++static int do_munmap(void *addr, size_t len)
++{
++    if (reserved_va) {
++        void *ptr = mmap(addr, len, PROT_NONE,
++                         MAP_FIXED | MAP_ANONYMOUS
++                         | MAP_PRIVATE | MAP_NORESERVE, -1, 0);
++        return ptr == addr ? 0 : -1;
++    }
++    return munmap(addr, len);
++}
++
+ /* map an incomplete host page */
+ static bool mmap_frag(abi_ulong real_start, abi_ulong start, abi_ulong last,
+                       int prot, int flags, int fd, off_t offset)
+@@ -854,13 +869,7 @@ static int mmap_reserve_or_unmap(abi_ulong start, abi_ulong len)
+     real_len = real_last - real_start + 1;
+     host_start = g2h_untagged(real_start);
+ 
+-    if (reserved_va) {
+-        void *ptr = mmap(host_start, real_len, PROT_NONE,
+-                         MAP_FIXED | MAP_ANONYMOUS
+-                         | MAP_PRIVATE | MAP_NORESERVE, -1, 0);
+-        return ptr == host_start ? 0 : -1;
+-    }
+-    return munmap(host_start, real_len);
++    return do_munmap(host_start, real_len);
+ }
+ 
+ int target_munmap(abi_ulong start, abi_ulong len)
+-- 
+GitLab
+