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-rw-r--r--linux-user/flatload.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/linux-user/flatload.c b/linux-user/flatload.c
index 7e3296e5aa..c9f1acd55f 100644
--- a/linux-user/flatload.c
+++ b/linux-user/flatload.c
@@ -756,6 +756,13 @@ int load_flt_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
p = copy_strings(p, bprm->argc, bprm->argv);
/* Align stack. */
sp = p & ~(target_ulong)(sizeof(target_ulong) - 1);
+ /* Enforce final stack alignment of 16 bytes. This is sufficient
+ for all current targets, and excess alignment is harmless. */
+ stack_len = bprm->envc + bprm->argc + 2;
+ stack_len += 3; /* argc, arvg, argp */
+ stack_len *= sizeof(target_ulong);
+ if ((sp + stack_len) & 15)
+ sp -= 16 - ((sp + stack_len) & 15);
sp = loader_build_argptr(bprm->envc, bprm->argc, sp, p, 1);
/* Fake some return addresses to ensure the call chain will