[Minios-devel] [UNIKRAFT/MUSL PATCH 13/19] Add patch to update setxid if syscall num is not known at build time

[Gaulthier Gain <gaulthier.gain@xxxxxxxxx>]

wip: This patch updates the setxid.c file by replacing the __syscall
function call by uk_syscall from the syscall_shin layer since the
syscall number is not known at build time.

Signed-off-by: Gaulthier Gain <gaulthier.gain@xxxxxxxxx>
---
 patches/0009-use-uk-syscall.patch | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 patches/0009-use-uk-syscall.patch

diff --git a/patches/0009-use-uk-syscall.patch 
b/patches/0009-use-uk-syscall.patch
new file mode 100644
index 0000000..f2f0faf
--- /dev/null
+++ b/patches/0009-use-uk-syscall.patch
@@ -0,0 +1,34 @@
+From e951c7996f2bf3d80143c2c2d5f16b49f28402de Mon Sep 17 00:00:00 2001
+From: Gaulthier Gain <gaulthier.gain@xxxxxxxxx>
+Date: Sun, 13 Oct 2019 17:21:03 +0200
+Subject: [MUSL] [PATCH] Use uk_syscall if syscall is not known at build time
+
+Signed-off-by: Gaulthier Gain <gaulthier.gain@xxxxxxxxx>
+---
+ src/unistd/setxid.c | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/src/unistd/setxid.c b/src/unistd/setxid.c
+index 0239f8a..f8ff653 100644
+--- a/src/unistd/setxid.c
++++ b/src/unistd/setxid.c
+@@ -1,6 +1,6 @@
+ #include <unistd.h>
+ #include <errno.h>
+-#include "syscall.h"
++#include <syscall.h>
+ #include "libc.h"
+ #include "pthread_impl.h"
+ 
+@@ -13,7 +13,7 @@ static void do_setxid(void *p)
+ {
+       struct ctx *c = p;
+       if (c->err>0) return;
+-      int ret = -__syscall(c->nr, c->id, c->eid, c->sid);
++      int ret = -uk_syscall(c->nr, c->id, c->eid, c->sid);
+       if (ret && !c->err) {
+               /* If one thread fails to set ids after another has already
+                * succeeded, forcibly killing the process is the only safe
+-- 
+2.11.0
+
-- 
2.11.0


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