From e9e2a0bd01d8c5ef4732a0f3a6f6bb4eee01bf31 Mon Sep 17 00:00:00 2001
From: Stefan Lankes <lankes@lfbs.rwth-aachen.de>
Date: Thu, 3 Mar 2011 09:47:14 +0100
Subject: [PATCH] add the support of the system call "execve" in our libgloss

---
 include/metalsvm/syscall.h             |  1 +
 newlib/src/libgloss/metalsvm/execve.c  | 12 ++++++++++--
 newlib/src/libgloss/metalsvm/syscall.h |  1 +
 3 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/include/metalsvm/syscall.h b/include/metalsvm/syscall.h
index 71863ade..0d47bedb 100644
--- a/include/metalsvm/syscall.h
+++ b/include/metalsvm/syscall.h
@@ -40,6 +40,7 @@ extern "C" {
 #define __NR_sbrk		11
 #define __NR_fork		12
 #define __NR_wait		13
+#define __NR_execve		14
 
 #ifdef __cplusplus
 }
diff --git a/newlib/src/libgloss/metalsvm/execve.c b/newlib/src/libgloss/metalsvm/execve.c
index ebdb4656..285b8248 100644
--- a/newlib/src/libgloss/metalsvm/execve.c
+++ b/newlib/src/libgloss/metalsvm/execve.c
@@ -24,6 +24,7 @@
 #undef errno
 extern int errno;
 #include "warning.h"
+#include "syscall.h"
 
 int
 _DEFUN (_execve, (name, argv, env),
@@ -31,6 +32,13 @@ _DEFUN (_execve, (name, argv, env),
         char **argv  _AND
         char **env)
 {
-	errno=ENOMEM;
-	return -1;
+	int ret;
+
+	ret = SYSCALL3(__NR_execve, name, argv, env);
+	if (ret < 0) {
+		errno = -ret;
+		ret = -1;
+	}
+
+	return ret;
 }
diff --git a/newlib/src/libgloss/metalsvm/syscall.h b/newlib/src/libgloss/metalsvm/syscall.h
index 478447ed..5390a27b 100644
--- a/newlib/src/libgloss/metalsvm/syscall.h
+++ b/newlib/src/libgloss/metalsvm/syscall.h
@@ -37,6 +37,7 @@ extern "C" {
 #define __NR_sbrk		11
 #define __NR_fork		12
 #define __NR_wait		13
+#define __NR_execve		14
 
 #define _STR(token)             #token
 #define _SYSCALLSTR(x)          "int $" _STR(x) " "