From 90418328239dc6be18b0dd6bf613ca692d6efc35 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Nicolas=20Hord=C3=A9?= <nicolas@palon.fr>
Date: Tue, 4 Dec 2018 21:57:44 +0100
Subject: [PATCH] feat: test sans --fomit-frame-pointer, travail sur sysexit

---
 include/syscall.h | 46 +++++++++++++---------------------------------
 lib/makefile      |  2 +-
 system/makefile   |  2 +-
 3 files changed, 15 insertions(+), 35 deletions(-)

diff --git a/include/syscall.h b/include/syscall.h
index 4910067..a0c0e06 100644
--- a/include/syscall.h
+++ b/include/syscall.h
@@ -9,7 +9,9 @@
 static inline long syscall(long syscall) {
 long ret;
 asm volatile (
-"mov %%esp,%%ecx;\
+"pushl %%ecx;\
+pushl %%edx;\
+mov %%esp,%%ecx;\
 mov $1f,%%edx;\
 sysenter;\
 1:" : "=a" (ret) : "a" (syscall): "ecx","edx","memory");
@@ -19,7 +21,9 @@ return ret;
 static inline long syscall1(long syscall, long arg1) {
 long ret;
 asm volatile (
-"mov %%esp,%%ecx;\
+"pushl %%ecx;\
+pushl %%edx;\
+mov %%esp,%%ecx;\
 mov $1f,%%edx;\
 sysenter;\
 1:" : "=a" (ret) : "a" (syscall), "b" (arg1) : "ecx","edx","memory");
@@ -29,7 +33,9 @@ return ret;
 static inline long syscall2(long syscall, long arg1, long arg2) {
 long ret;
 asm volatile (
-"mov %%esp,%%ecx;\
+"pushl %%ecx;\
+pushl %%edx;\
+mov %%esp,%%ecx;\
 mov $1f,%%edx;\
 sysenter;\
 1:" : "=a" (ret) : "a" (syscall), "b" (arg1), "S" (arg2) : "ecx","edx","memory");
@@ -39,41 +45,15 @@ return ret;
 static inline long syscall3(long syscall, long arg1, long arg2, long arg3) {
 long ret;
 asm volatile (
-"mov %%esp,%%ecx;\
+"pushl %%ecx;\
+pushl %%edx;\
+mov %%esp,%%ecx;\
 mov $1f,%%edx;\
 sysenter;\
 1:" : "=a" (ret) : "a" (syscall), "b" (arg1), "S" (arg2), "D" (arg3) : "ecx","edx","memory");
 return ret;
 }
 
-/*static inline long syscall4(long syscall, long arg1, long arg2, long arg3, long arg4) {
-long ret;
-asm volatile ("mov %%esp,%%ecx;
-"mov $1f,%%edx;
-"sysenter;
-1:" : "=a" (ret) : "a" (syscall), "b" (arg1), "c" (arg2), 
-"d" (arg3), "S" (arg4) : “memory”);
-return ret;
-}
-
-static inline long syscall5(long syscall, long arg1, long arg2, long arg3, long arg4, long arg5) {
-long ret;
-asm volatile ("mov %%esp,%%ecx;
-"mov $1f,%%edx;
-"sysenter;
-1:" : "=a" (ret) : "a" (syscall), "b" (arg1), "c" (arg2), 
-"d" (arg3), "S" (arg4), "D" (arg5) : “memory”);
-return ret;
-}
-
-static inline long syscall6(long syscall, long arg1, long arg2, long arg3, long arg4, long arg5, long arg6) {
-long ret;
-asm volatile ("mov %%esp,%%ecx;
-"mov $1f,%%edx;
-"sysenter;
-1:" : "=a" (ret) : "a" (syscall), "b" (arg1), "c" (arg2), 
-"d" (arg3), "S" (arg4), "D", (arg5), "d" (arg6) : “memory”);
-return ret;
-}*/
+/* Vers 6 arguments maximum */
 void initsyscall(void);
 void sysenter_handler(void);
diff --git a/lib/makefile b/lib/makefile
index bc48e53..815b6a1 100755
--- a/lib/makefile
+++ b/lib/makefile
@@ -1,4 +1,4 @@
-CC=gcc -O0 -g -nostdinc -ffreestanding -fno-builtin -fomit-frame-pointer -Wall -w -m32 -F pe-i386 -I ../include
+CC=gcc -O0 -g -nostdinc -ffreestanding -fno-builtin -Wall -w -m32 -F pe-i386 -I ../include
 LINK=ld -m elf_i386 -r -o
 SRCS= $(wildcard *.c)
 OBJS= $(SRCS:.c=.o)
diff --git a/system/makefile b/system/makefile
index 642fbbf..922a303 100755
--- a/system/makefile
+++ b/system/makefile
@@ -1,4 +1,4 @@
-GCC=gcc -O0 -g -nostdinc -ffreestanding -fno-builtin -fomit-frame-pointer -Wall -w -I ../include -m32 -c -o
+GCC=gcc -O0 -g -nostdinc -ffreestanding -fno-builtin -Wall -w -I ../include -m32 -c -o
 ASM=nasm
 LINK=ld -m elf_i386 -T linker.lds -n -o