sandbox: ensure that state->ram_buf is in low memory

Addresses in state->ram_buf must be in the low 4 GiB of the address space.
Otherwise we cannot correctly fill SMBIOS tables. This shows up in warnings
like:

    WARNING: SMBIOS table_address overflow 7f752735e020

Ensure that state->ram_buf is initialized by the first invocation of
os_malloc().

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>

diff --git a/arch/sandbox/cpu/start.c b/arch/sandbox/cpu/start.c
index 63b086d..ad17e17 100644 (file)
--- a/arch/sandbox/cpu/start.c
+++ b/arch/sandbox/cpu/start.c
@@ -454,6 +454,14 @@ int main(int argc, char *argv[])
        text_base = os_find_text_base();
 
        /*
+        * This must be the first invocation of os_malloc() to have
+        * state->ram_buf in the low 4 GiB.
+        */
+       ret = state_init();
+       if (ret)
+               goto err;
+
+       /*
         * Copy argv[] so that we can pass the arguments in the original
         * sequence when resetting the sandbox.
         */
@@ -467,10 +475,6 @@ int main(int argc, char *argv[])
        gd = &data;
        gd->arch.text_base = text_base;
 
-       ret = state_init();
-       if (ret)
-               goto err;
-
        state = state_get_current();
        if (os_parse_args(state, argc, argv))
                return 1;