qemu: re-add patch for missing arch_prctl() - needed for x86 builds

2020-12-11 14:49:17 +02:00 · 2020-12-11 14:49:17 +02:00 · 291f7bc9e1
parent a69aeaba1c
commit 291f7bc9e1
1 changed files with 16 additions and 0 deletions
--- a/packages/qemu-system-x86-64-headless/0012-add-missing-arch_prctl.patch
+++ b/packages/qemu-system-x86-64-headless/0012-add-missing-arch_prctl.patch
@ -0,0 +1,16 @@
+--- qemu-4.2.0/tcg/i386/tcg-target.c.inc
+++ qemu-4.2.0.mod/tcg/i386/tcg-target.c.inc
+@@ -1968,7 +1968,12 @@
+ # if defined(__x86_64__) && defined(__linux__)
+ #  include <asm/prctl.h>
+ #  include <sys/prctl.h>
+-int arch_prctl(int code, unsigned long addr);
+#  include <linux/unistd.h>
+static int arch_prctl(int code, unsigned long addr)
+{
+    return syscall(__NR_arch_prctl, code, addr);
+}
+
+ static inline int setup_guest_base_seg(void)
+ {
+     if (arch_prctl(ARCH_SET_GS, guest_base) == 0) {