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28 files changed, 1573 insertions, 0 deletions

diff --git a/Semestr 4/ask/lista7/zad7.ll b/Semestr 4/ask/lista7/zad7.ll
new file mode 100644
index 0000000..a99e8d8
--- /dev/null
+++ b/Semestr 4/ask/lista7/zad7.ll
@@ -0,0 +1,174 @@
+; ModuleID = 'zad7.cpp'
+source_filename = "zad7.cpp"
+target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-pc-linux-gnu"
+
+%struct.Base = type <{ i32 (...)**, i32, [4 x i8] }>
+%struct.Derived = type { %struct.Base.base, [4 x i8] }
+%struct.Base.base = type <{ i32 (...)**, i32 }>
+
+$_ZN4BaseC1Ei = comdat any
+
+$_ZN7DerivedC1Ei = comdat any
+
+$_ZN4BaseC2Ei = comdat any
+
+$_ZN4Base4doitEi = comdat any
+
+$_ZN7DerivedC2Ei = comdat any
+
+$_ZN7Derived4doitEi = comdat any
+
+$_ZTV4Base = comdat any
+
+$_ZTS4Base = comdat any
+
+$_ZTI4Base = comdat any
+
+$_ZTV7Derived = comdat any
+
+$_ZTS7Derived = comdat any
+
+$_ZTI7Derived = comdat any
+
+@_ZTV4Base = linkonce_odr unnamed_addr constant { [3 x i8*] } { [3 x i8*] [i8* null, i8* bitcast ({ i8*, i8* }* @_ZTI4Base to i8*), i8* bitcast (i32 (%struct.Base*, i32)* @_ZN4Base4doitEi to i8*)] }, comdat, align 8
+@_ZTVN10__cxxabiv117__class_type_infoE = external global i8*
+@_ZTS4Base = linkonce_odr constant [6 x i8] c"4Base\00", comdat, align 1
+@_ZTI4Base = linkonce_odr constant { i8*, i8* } { i8* bitcast (i8** getelementptr inbounds (i8*, i8** @_ZTVN10__cxxabiv117__class_type_infoE, i64 2) to i8*), i8* getelementptr inbounds ([6 x i8], [6 x i8]* @_ZTS4Base, i32 0, i32 0) }, comdat, align 8
+@_ZTV7Derived = linkonce_odr unnamed_addr constant { [3 x i8*] } { [3 x i8*] [i8* null, i8* bitcast ({ i8*, i8*, i8* }* @_ZTI7Derived to i8*), i8* bitcast (i32 (%struct.Derived*, i32)* @_ZN7Derived4doitEi to i8*)] }, comdat, align 8
+@_ZTVN10__cxxabiv120__si_class_type_infoE = external global i8*
+@_ZTS7Derived = linkonce_odr constant [9 x i8] c"7Derived\00", comdat, align 1
+@_ZTI7Derived = linkonce_odr constant { i8*, i8*, i8* } { i8* bitcast (i8** getelementptr inbounds (i8*, i8** @_ZTVN10__cxxabiv120__si_class_type_infoE, i64 2) to i8*), i8* getelementptr inbounds ([9 x i8], [9 x i8]* @_ZTS7Derived, i32 0, i32 0), i8* bitcast ({ i8*, i8* }* @_ZTI4Base to i8*) }, comdat, align 8
+
+; Function Attrs: noinline nounwind optnone
+define i32 @_Z4doitP4Base(%struct.Base* %bp) #0 {
+entry:
+  %bp.addr = alloca %struct.Base*, align 8
+  store %struct.Base* %bp, %struct.Base** %bp.addr, align 8
+  %0 = load %struct.Base*, %struct.Base** %bp.addr, align 8
+  %1 = bitcast %struct.Base* %0 to i32 (%struct.Base*, i32)***
+  %vtable = load i32 (%struct.Base*, i32)**, i32 (%struct.Base*, i32)*** %1, align 8
+  %vfn = getelementptr inbounds i32 (%struct.Base*, i32)*, i32 (%struct.Base*, i32)** %vtable, i64 0
+  %2 = load i32 (%struct.Base*, i32)*, i32 (%struct.Base*, i32)** %vfn, align 8
+  %call = call i32 %2(%struct.Base* %0, i32 1)
+  ret i32 %call
+}
+
+; Function Attrs: noinline norecurse nounwind optnone
+define i32 @main(i32 %argc, i8** %argv) #1 {
+entry:
+  %retval = alloca i32, align 4
+  %argc.addr = alloca i32, align 4
+  %argv.addr = alloca i8**, align 8
+  %b = alloca %struct.Base, align 8
+  %d = alloca %struct.Derived, align 8
+  store i32 0, i32* %retval, align 4
+  store i32 %argc, i32* %argc.addr, align 4
+  store i8** %argv, i8*** %argv.addr, align 8
+  call void @_ZN4BaseC1Ei(%struct.Base* %b, i32 10)
+  call void @_ZN7DerivedC1Ei(%struct.Derived* %d, i32 20)
+  %call = call i32 @_Z4doitP4Base(%struct.Base* %b)
+  %0 = bitcast %struct.Derived* %d to %struct.Base*
+  %call1 = call i32 @_Z4doitP4Base(%struct.Base* %0)
+  %add = add nsw i32 %call, %call1
+  ret i32 %add
+}
+
+; Function Attrs: noinline nounwind optnone
+define linkonce_odr void @_ZN4BaseC1Ei(%struct.Base* %this, i32 %n) unnamed_addr #0 comdat align 2 {
+entry:
+  %this.addr = alloca %struct.Base*, align 8
+  %n.addr = alloca i32, align 4
+  store %struct.Base* %this, %struct.Base** %this.addr, align 8
+  store i32 %n, i32* %n.addr, align 4
+  %this1 = load %struct.Base*, %struct.Base** %this.addr, align 8
+  %0 = load i32, i32* %n.addr, align 4
+  call void @_ZN4BaseC2Ei(%struct.Base* %this1, i32 %0)
+  ret void
+}
+
+; Function Attrs: noinline nounwind optnone
+define linkonce_odr void @_ZN7DerivedC1Ei(%struct.Derived* %this, i32 %n) unnamed_addr #0 comdat align 2 {
+entry:
+  %this.addr = alloca %struct.Derived*, align 8
+  %n.addr = alloca i32, align 4
+  store %struct.Derived* %this, %struct.Derived** %this.addr, align 8
+  store i32 %n, i32* %n.addr, align 4
+  %this1 = load %struct.Derived*, %struct.Derived** %this.addr, align 8
+  %0 = load i32, i32* %n.addr, align 4
+  call void @_ZN7DerivedC2Ei(%struct.Derived* %this1, i32 %0)
+  ret void
+}
+
+; Function Attrs: noinline nounwind optnone
+define linkonce_odr void @_ZN4BaseC2Ei(%struct.Base* %this, i32 %n) unnamed_addr #0 comdat align 2 {
+entry:
+  %this.addr = alloca %struct.Base*, align 8
+  %n.addr = alloca i32, align 4
+  store %struct.Base* %this, %struct.Base** %this.addr, align 8
+  store i32 %n, i32* %n.addr, align 4
+  %this1 = load %struct.Base*, %struct.Base** %this.addr, align 8
+  %0 = bitcast %struct.Base* %this1 to i32 (...)***
+  store i32 (...)** bitcast (i8** getelementptr inbounds ({ [3 x i8*] }, { [3 x i8*] }* @_ZTV4Base, i32 0, inrange i32 0, i32 2) to i32 (...)**), i32 (...)*** %0, align 8
+  %data = getelementptr inbounds %struct.Base, %struct.Base* %this1, i32 0, i32 1
+  %1 = load i32, i32* %n.addr, align 4
+  store i32 %1, i32* %data, align 8
+  ret void
+}
+
+; Function Attrs: noinline nounwind optnone
+define linkonce_odr i32 @_ZN4Base4doitEi(%struct.Base* %this, i32 %n) unnamed_addr #0 comdat align 2 {
+entry:
+  %this.addr = alloca %struct.Base*, align 8
+  %n.addr = alloca i32, align 4
+  store %struct.Base* %this, %struct.Base** %this.addr, align 8
+  store i32 %n, i32* %n.addr, align 4
+  %this1 = load %struct.Base*, %struct.Base** %this.addr, align 8
+  %0 = load i32, i32* %n.addr, align 4
+  %data = getelementptr inbounds %struct.Base, %struct.Base* %this1, i32 0, i32 1
+  %1 = load i32, i32* %data, align 8
+  %sub = sub nsw i32 %0, %1
+  ret i32 %sub
+}
+
+; Function Attrs: noinline nounwind optnone
+define linkonce_odr void @_ZN7DerivedC2Ei(%struct.Derived* %this, i32 %n) unnamed_addr #0 comdat align 2 {
+entry:
+  %this.addr = alloca %struct.Derived*, align 8
+  %n.addr = alloca i32, align 4
+  store %struct.Derived* %this, %struct.Derived** %this.addr, align 8
+  store i32 %n, i32* %n.addr, align 4
+  %this1 = load %struct.Derived*, %struct.Derived** %this.addr, align 8
+  %0 = bitcast %struct.Derived* %this1 to %struct.Base*
+  %1 = load i32, i32* %n.addr, align 4
+  %add = add nsw i32 %1, 1
+  call void @_ZN4BaseC2Ei(%struct.Base* %0, i32 %add)
+  %2 = bitcast %struct.Derived* %this1 to i32 (...)***
+  store i32 (...)** bitcast (i8** getelementptr inbounds ({ [3 x i8*] }, { [3 x i8*] }* @_ZTV7Derived, i32 0, inrange i32 0, i32 2) to i32 (...)**), i32 (...)*** %2, align 8
+  ret void
+}
+
+; Function Attrs: noinline nounwind optnone
+define linkonce_odr i32 @_ZN7Derived4doitEi(%struct.Derived* %this, i32 %n) unnamed_addr #0 comdat align 2 {
+entry:
+  %this.addr = alloca %struct.Derived*, align 8
+  %n.addr = alloca i32, align 4
+  store %struct.Derived* %this, %struct.Derived** %this.addr, align 8
+  store i32 %n, i32* %n.addr, align 4
+  %this1 = load %struct.Derived*, %struct.Derived** %this.addr, align 8
+  %0 = load i32, i32* %n.addr, align 4
+  %1 = bitcast %struct.Derived* %this1 to %struct.Base*
+  %data = getelementptr inbounds %struct.Base, %struct.Base* %1, i32 0, i32 1
+  %2 = load i32, i32* %data, align 8
+  %mul = mul nsw i32 %0, %2
+  ret i32 %mul
+}
+
+attributes #0 = { noinline nounwind optnone "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="none" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-features"="+cx8,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #1 = { noinline norecurse nounwind optnone "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="none" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-features"="+cx8,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
+
+!llvm.module.flags = !{!0}
+!llvm.ident = !{!1}
+
+!0 = !{i32 1, !"wchar_size", i32 4}
+!1 = !{!"clang version 10.0.0-4ubuntu1 "}
diff --git a/Semestr 4/ask/lista8/._lista_8 b/Semestr 4/ask/lista8/._lista_8
new file mode 100755
index 0000000..893436c
--- /dev/null
+++ b/Semestr 4/ask/lista8/._lista_8
diff --git a/Semestr 4/ask/lista8/ask21_lista_8.tgz b/Semestr 4/ask/lista8/ask21_lista_8.tgz
new file mode 100644
index 0000000..789c9af
--- /dev/null
+++ b/Semestr 4/ask/lista8/ask21_lista_8.tgz
diff --git a/Semestr 4/ask/lista8/bar.c b/Semestr 4/ask/lista8/bar.c
new file mode 100644
index 0000000..97fbd4f
--- /dev/null
+++ b/Semestr 4/ask/lista8/bar.c
@@ -0,0 +1,5 @@
+// extern long foo;
+
+int bar = 42;
+// long *foo_p = &foo;
+short dead[15];
diff --git a/Semestr 4/ask/lista8/even.c b/Semestr 4/ask/lista8/even.c
new file mode 100644
index 0000000..5bf8606
--- /dev/null
+++ b/Semestr 4/ask/lista8/even.c
@@ -0,0 +1,8 @@
+int is_odd(long n);
+
+int is_even(long n) {
+  if (n == 0)
+    return 1;
+  else
+    return is_odd(n - 1);
+}
diff --git a/Semestr 4/ask/lista8/foo.c b/Semestr 4/ask/lista8/foo.c
new file mode 100644
index 0000000..080d831
--- /dev/null
+++ b/Semestr 4/ask/lista8/foo.c
@@ -0,0 +1,5 @@
+// extern int bar;
+
+long foo = 19;
+// int *bar_p = &bar;
+char code[17];
diff --git a/Semestr 4/ask/lista8/lazy.c b/Semestr 4/ask/lista8/lazy.c
new file mode 100644
index 0000000..fb08cf7
--- /dev/null
+++ b/Semestr 4/ask/lista8/lazy.c
@@ -0,0 +1,7 @@
+#include <stdio.h>
+
+int main(void) {
+  puts("first time");
+  puts("second time");
+  return 0;
+}
diff --git a/Semestr 4/ask/lista8/main.lds b/Semestr 4/ask/lista8/main.lds
new file mode 100644
index 0000000..25a4ca9
--- /dev/null
+++ b/Semestr 4/ask/lista8/main.lds
@@ -0,0 +1,39 @@
+OUTPUT_FORMAT("elf64-x86-64")
+OUTPUT_ARCH(i386:x86-64)
+ENTRY(_start)
+PHDRS
+{
+  code   PT_LOAD FLAGS(5);
+  rodata PT_LOAD FLAGS(4);
+  data   PT_LOAD FLAGS(6);
+}
+SECTIONS
+{
+  . = 0x400000 + SIZEOF_HEADERS;
+
+  .text :
+  {
+    *(.text .text.*)
+  } : code
+
+  .rodata :
+  {
+    *(.rodata .rodata.*)
+  } : rodata
+
+  .data : 
+  {
+    *(.data .data.*)
+  } : data
+
+  .bss :
+  {
+   *(.bss .bss.*)
+   *(COMMON)
+  } : data
+
+  /DISCARD/ :
+  {
+    *(.note.gnu.property)
+  }
+}
diff --git a/Semestr 4/ask/lista8/merge-1.map b/Semestr 4/ask/lista8/merge-1.map
new file mode 100644
index 0000000..2e93e7c
--- /dev/null
+++ b/Semestr 4/ask/lista8/merge-1.map
@@ -0,0 +1,300 @@
+
+Merging program properties
+
+
+Discarded input sections
+
+ .note.gnu.property
+                0x0000000000000000       0x20 bar.o
+
+Memory Configuration
+
+Name             Origin             Length             Attributes
+*default*        0x0000000000000000 0xffffffffffffffff
+
+Linker script and memory map
+
+LOAD foo.o
+LOAD bar.o
+
+.interp
+ *(.interp)
+
+.note.gnu.property
+                0x0000000000000000       0x20
+ .note.gnu.property
+                0x0000000000000000       0x20 foo.o
+
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+.rela.ifunc
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+.rela.plt
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+.init
+ *(SORT_NONE(.init))
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+.plt
+ *(.plt)
+
+.plt.got
+ *(.plt.got)
+
+.plt.sec
+ *(.plt.sec)
+
+.text           0x0000000000000000        0x0
+ *(.text .stub)
+ .text          0x0000000000000000        0x0 foo.o
+ .text          0x0000000000000000        0x0 bar.o
+ *(.gnu.warning)
+
+.fini
+ *(SORT_NONE(.fini))
+
+.rodata
+ *(.rodata)
+
+.rodata1
+ *(.rodata1)
+
+.eh_frame_hdr
+ *(.eh_frame_hdr)
+
+.eh_frame
+ *(.eh_frame)
+
+.gcc_except_table
+ *(.gcc_except_table)
+
+.gnu_extab
+ *(.gnu_extab*)
+
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+
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+.got.plt
+ *(.got.plt)
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+.data           0x0000000000000000        0xc
+ *(.data)
+ .data          0x0000000000000000        0x8 foo.o
+                0x0000000000000000                foo
+ .data          0x0000000000000008        0x4 bar.o
+                0x0000000000000008                bar
+
+.data1
+ *(.data1)
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+ .bss           0x0000000000000000       0x11 foo.o
+                0x0000000000000000                code
+ *fill*         0x0000000000000011        0xf 
+ .bss           0x0000000000000020       0x1e bar.o
+                0x0000000000000020                dead
+
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+ .comment       0x000000000000002b       0x2b bar.o
+
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+
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+OUTPUT(merge-1.o elf64-x86-64)
diff --git a/Semestr 4/ask/lista8/merge-2.map b/Semestr 4/ask/lista8/merge-2.map
new file mode 100644
index 0000000..2677803
--- /dev/null
+++ b/Semestr 4/ask/lista8/merge-2.map
@@ -0,0 +1,301 @@
+
+Merging program properties
+
+
+Discarded input sections
+
+ .note.gnu.property
+                0x0000000000000000       0x20 foo.o
+
+Memory Configuration
+
+Name             Origin             Length             Attributes
+*default*        0x0000000000000000 0xffffffffffffffff
+
+Linker script and memory map
+
+LOAD bar.o
+LOAD foo.o
+
+.interp
+ *(.interp)
+
+.note.gnu.property
+                0x0000000000000000       0x20
+ .note.gnu.property
+                0x0000000000000000       0x20 bar.o
+
+.note.gnu.build-id
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+
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+ *(.rela.plt)
+
+.init
+ *(SORT_NONE(.init))
+
+.plt
+ *(.plt)
+
+.plt.got
+ *(.plt.got)
+
+.plt.sec
+ *(.plt.sec)
+
+.text           0x0000000000000000        0x0
+ *(.text .stub)
+ .text          0x0000000000000000        0x0 bar.o
+ .text          0x0000000000000000        0x0 foo.o
+ *(.gnu.warning)
+
+.fini
+ *(SORT_NONE(.fini))
+
+.rodata
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+
+.rodata1
+ *(.rodata1)
+
+.eh_frame_hdr
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+
+.eh_frame
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+
+.gcc_except_table
+ *(.gcc_except_table)
+
+.gnu_extab
+ *(.gnu_extab*)
+
+.exception_ranges
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+
+.eh_frame
+ *(.eh_frame)
+
+.gnu_extab
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+
+.gcc_except_table
+ *(.gcc_except_table)
+
+.exception_ranges
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+ *(.tbss)
+
+.jcr
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+.dynamic
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+.got.plt
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+.data           0x0000000000000000       0x10
+ *(.data)
+ .data          0x0000000000000000        0x4 bar.o
+                0x0000000000000000                bar
+ *fill*         0x0000000000000004        0x4 
+ .data          0x0000000000000008        0x8 foo.o
+                0x0000000000000008                foo
+
+.data1
+ *(.data1)
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+.bss            0x0000000000000000       0x31
+ *(.bss)
+ .bss           0x0000000000000000       0x1e bar.o
+                0x0000000000000000                dead
+ *fill*         0x000000000000001e        0x2 
+ .bss           0x0000000000000020       0x11 foo.o
+                0x0000000000000020                code
+
+.lbss
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+
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+ *(.comment)
+ .comment       0x0000000000000000       0x2b bar.o
+ .comment       0x000000000000002b       0x2b foo.o
+
+.note.GNU-stack
+                0x0000000000000000        0x0
+ .note.GNU-stack
+                0x0000000000000000        0x0 bar.o
+ .note.GNU-stack
+                0x0000000000000000        0x0 foo.o
+
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+ *(.gnu.build.attributes)
+
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+ *(.debug_line)
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+ *(.debug_addr)
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+OUTPUT(merge-2.o elf64-x86-64)
diff --git a/Semestr 4/ask/lista8/mismatch-a.c b/Semestr 4/ask/lista8/mismatch-a.c
new file mode 100644
index 0000000..39436f2
--- /dev/null
+++ b/Semestr 4/ask/lista8/mismatch-a.c
@@ -0,0 +1,7 @@
+/* mismatch-a.c */
+void p2(void);
+
+int main() {
+  p2();
+  return 0;
+}
diff --git a/Semestr 4/ask/lista8/mismatch-b.c b/Semestr 4/ask/lista8/mismatch-b.c
new file mode 100644
index 0000000..451d5b3
--- /dev/null
+++ b/Semestr 4/ask/lista8/mismatch-b.c
@@ -0,0 +1,8 @@
+/* mismatch-b.c */
+#include <stdio.h>
+
+char main;
+
+void p2() {
+  printf("0x%x\n", main);
+}
diff --git a/Semestr 4/ask/lista8/odd.c b/Semestr 4/ask/lista8/odd.c
new file mode 100644
index 0000000..c32961e
--- /dev/null
+++ b/Semestr 4/ask/lista8/odd.c
@@ -0,0 +1,8 @@
+int is_even(long n);
+
+int is_odd(long n) {
+  if (n == 0)
+    return 0;
+  else
+    return is_even(n - 1);
+}
diff --git a/Semestr 4/ask/lista8/relo3.c b/Semestr 4/ask/lista8/relo3.c
new file mode 100644
index 0000000..6aca7b6
--- /dev/null
+++ b/Semestr 4/ask/lista8/relo3.c
@@ -0,0 +1,15 @@
+int relo3(int val) {
+  switch (val) {
+    case 100:
+      return val;
+    case 101:
+      return val + 1;
+    case 103:
+    case 104:
+      return val + 3;
+    case 105:
+      return val + 5;
+    default:
+      return val + 6;
+  }
+}
diff --git a/Semestr 4/ask/lista8/start.c b/Semestr 4/ask/lista8/start.c
new file mode 100644
index 0000000..a875ace
--- /dev/null
+++ b/Semestr 4/ask/lista8/start.c
@@ -0,0 +1,8 @@
+int is_even(long);
+
+void _start(void) {
+  asm volatile(
+    "syscall"
+    : /* no output */
+    : "a" (0x3c), "D" (is_even(42)));
+}
diff --git a/Semestr 4/ask/lista8/str-a.c b/Semestr 4/ask/lista8/str-a.c
new file mode 100644
index 0000000..3b0fb36
--- /dev/null
+++ b/Semestr 4/ask/lista8/str-a.c
@@ -0,0 +1,10 @@
+#include <stdio.h>
+
+char *somestr(void);
+
+int main(void) {
+  char *s = somestr();
+  s[5] = '\0';
+  puts(s);
+  return 0;
+}
diff --git a/Semestr 4/ask/lista8/str-b.c b/Semestr 4/ask/lista8/str-b.c
new file mode 100644
index 0000000..50101cb
--- /dev/null
+++ b/Semestr 4/ask/lista8/str-b.c
@@ -0,0 +1,9 @@
+#include <stdlib.h>
+#include <string.h>
+
+char *somestr(void) {
+  char *buf = malloc(sizeof("Hello, world!"));
+  strcpy(buf, "Hello, world!");  
+  return buf;
+}
+
diff --git a/Semestr 4/ask/lista8/swap.c b/Semestr 4/ask/lista8/swap.c
new file mode 100644
index 0000000..e1966fd
--- /dev/null
+++ b/Semestr 4/ask/lista8/swap.c
@@ -0,0 +1,18 @@
+extern int buf[];
+
+int *bufp0 = &buf[0];
+static int *bufp1;
+
+static void incr() {
+  static int count = 0;
+  count++;
+}
+
+void swap() {
+  int temp;
+  incr();
+  bufp1 = &buf[1];
+  temp = *bufp0;
+  *bufp0 = *bufp1;
+  *bufp1 = temp;
+}
diff --git a/Semestr 4/ask/lista9/gadget.s b/Semestr 4/ask/lista9/gadget.s
new file mode 100644
index 0000000..6d60a63
--- /dev/null
+++ b/Semestr 4/ask/lista9/gadget.s
@@ -0,0 +1,16 @@
+        .global gadget
+
+        .text
+
+# rax: 0x3c
+# rdi: 0
+# rdx: {NULL, ...}
+# rsi: path + '\n'
+gadget:
+        dec     %rax            # rax: 0x3c -> 0x3b (sys_execve)
+        mov     %rdx, %rsi      # rsi: argv = {NULL}
+        mov     %rdi, %rdx      # rdx: envp = NULL
+        lea     16(%rsp),%rdi   # rdi: path
+        ret
+
+# vim: ft=gas
diff --git a/Semestr 4/ask/lista9/lazy.c b/Semestr 4/ask/lista9/lazy.c
new file mode 100644
index 0000000..fb08cf7
--- /dev/null
+++ b/Semestr 4/ask/lista9/lazy.c
@@ -0,0 +1,7 @@
+#include <stdio.h>
+
+int main(void) {
+  puts("first time");
+  puts("second time");
+  return 0;
+}
diff --git a/Semestr 4/ask/lista9/lista_9.tgz b/Semestr 4/ask/lista9/lista_9.tgz
new file mode 100644
index 0000000..5e5c6f4
--- /dev/null
+++ b/Semestr 4/ask/lista9/lista_9.tgz
diff --git a/Semestr 4/ask/lista9/relo3.c b/Semestr 4/ask/lista9/relo3.c
new file mode 100644
index 0000000..6aca7b6
--- /dev/null
+++ b/Semestr 4/ask/lista9/relo3.c
@@ -0,0 +1,15 @@
+int relo3(int val) {
+  switch (val) {
+    case 100:
+      return val;
+    case 101:
+      return val + 1;
+    case 103:
+    case 104:
+      return val + 3;
+    case 105:
+      return val + 5;
+    default:
+      return val + 6;
+  }
+}
diff --git a/Semestr 4/ask/lista9/ropex.c b/Semestr 4/ask/lista9/ropex.c
new file mode 100644
index 0000000..dbeae12
--- /dev/null
+++ b/Semestr 4/ask/lista9/ropex.c
@@ -0,0 +1,31 @@
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+
+/* Get string from stdin */
+void readline(FILE *in, char *p) {
+  int c;
+  while (true) {
+    c = fgetc(in);
+    if (c == EOF || c == '\n')
+      break;
+    *p++ = c;
+  }
+  *p = '\0';
+} 
+
+void echo(FILE *in) {
+  char buf[48];
+  readline(in, buf);
+  puts(buf);
+}
+
+int main(int argc, char *argv[]) {
+  FILE *in = NULL;
+  if (argc == 2)
+    in = fopen(argv[1], "rb");
+  if (in == NULL)
+    in = stdin;
+  echo(in);
+  return 0;
+} 
diff --git a/Semestr 4/ask/lista9/ropex.in (1).txt b/Semestr 4/ask/lista9/ropex.in (1).txt
new file mode 100644
index 0000000..902773e
--- /dev/null
+++ b/Semestr 4/ask/lista9/ropex.in (1).txt
@@ -0,0 +1,7 @@
+00000000: dead c0de dead c0de dead c0de dead c0de  ................
+00000010: dead c0de dead c0de dead c0de dead c0de  ................
+00000020: dead c0de dead c0de dead c0de dead c0de  ................
+00000030: dead c0de dead c0de 731c 4000 0000 0000  ................
+00000040: f422 4000 0000 0000 0000 0000 0000 0000  ................
+00000050: 2f75 7372 2f62 696e 2f70 7974 686f 6e32  /usr/bin/python2
+00000060: 000a                                     ................
diff --git a/Semestr 4/ask/lista9/ropex.in.txt b/Semestr 4/ask/lista9/ropex.in.txt
new file mode 100644
index 0000000..8deabfe
--- /dev/null
+++ b/Semestr 4/ask/lista9/ropex.in.txt
@@ -0,0 +1,7 @@
+00000000: dead c0de dead c0de dead c0de dead c0de  ................
+00000010: dead c0de dead c0de dead c0de dead c0de  ................
+00000020: dead c0de dead c0de dead c0de dead c0de  ................
+00000030: dead c0de dead c0de 671d 4000 0000 0000  ................
+00000040: 8e44 4900 0000 0000 0000 0000 0000 0000  ................
+00000050: 2f75 7372 2f62 696e 2f6e 7961 6e63 6174  /usr/bin/nyancat
+00000060: 000a                                     ................
\ No newline at end of file
diff --git a/Semestr 4/ask/lista9/ropex.map b/Semestr 4/ask/lista9/ropex.map
new file mode 100644
index 0000000..4bd12a5
--- /dev/null
+++ b/Semestr 4/ask/lista9/ropex.map
@@ -0,0 +1,511 @@
+Archive member included to satisfy reference by file (symbol)
+
+/usr/lib/x86_64-linux-gnu/libc_nonshared.a(elf-init.oS)
+                              /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o (__libc_csu_init)
+
+Merging program properties
+
+Removed property 0xc0000002 to merge /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o (0x3) and gadget.o (not found)
+Removed property 0xc0000002 to merge /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o (not found) and /usr/lib/x86_64-linux-gnu/libc_nonshared.a(elf-init.oS) (0x3)
+Removed property 0xc0000002 to merge /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o (not found) and /usr/lib/gcc/x86_64-linux-gnu/9/crtendS.o (0x3)
+Removed property 0xc0000002 to merge /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o (not found) and /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/crtn.o (0x3)
+
+As-needed library included to satisfy reference by file (symbol)
+
+libc.so.6                     ropex.o (fopen@@GLIBC_2.2.5)
+
+Discarded input sections
+
+ .note.gnu.property
+                0x0000000000000000       0x20 /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o
+ .note.GNU-stack
+                0x0000000000000000        0x0 /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o
+ .note.gnu.property
+                0x0000000000000000       0x20 /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/crti.o
+ .note.GNU-stack
+                0x0000000000000000        0x0 /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/crti.o
+ .note.GNU-stack
+                0x0000000000000000        0x0 /usr/lib/gcc/x86_64-linux-gnu/9/crtbeginS.o
+ .note.gnu.property
+                0x0000000000000000       0x20 /usr/lib/gcc/x86_64-linux-gnu/9/crtbeginS.o
+ .note.GNU-stack
+                0x0000000000000000        0x0 ropex.o
+ .note.gnu.property
+                0x0000000000000000       0x20 ropex.o
+ .note.GNU-stack
+                0x0000000000000000        0x0 /usr/lib/x86_64-linux-gnu/libc_nonshared.a(elf-init.oS)
+ .note.gnu.property
+                0x0000000000000000       0x20 /usr/lib/x86_64-linux-gnu/libc_nonshared.a(elf-init.oS)
+ .note.GNU-stack
+                0x0000000000000000        0x0 /usr/lib/gcc/x86_64-linux-gnu/9/crtendS.o
+ .note.gnu.property
+                0x0000000000000000       0x20 /usr/lib/gcc/x86_64-linux-gnu/9/crtendS.o
+ .note.gnu.property
+                0x0000000000000000       0x20 /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/crtn.o
+ .note.GNU-stack
+                0x0000000000000000        0x0 /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/crtn.o
+
+Memory Configuration
+
+Name             Origin             Length             Attributes
+*default*        0x0000000000000000 0xffffffffffffffff
+
+Linker script and memory map
+
+LOAD /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o
+LOAD /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/crti.o
+LOAD /usr/lib/gcc/x86_64-linux-gnu/9/crtbeginS.o
+LOAD ropex.o
+LOAD gadget.o
+LOAD /usr/lib/gcc/x86_64-linux-gnu/9/libgcc.a
+LOAD /usr/lib/gcc/x86_64-linux-gnu/9/libgcc_s.so
+START GROUP
+LOAD /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/libgcc_s.so.1
+LOAD /usr/lib/gcc/x86_64-linux-gnu/9/libgcc.a
+END GROUP
+LOAD /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/libc.so
+START GROUP
+LOAD /lib/x86_64-linux-gnu/libc.so.6
+LOAD /usr/lib/x86_64-linux-gnu/libc_nonshared.a
+LOAD /lib/x86_64-linux-gnu/ld-linux-x86-64.so.2
+END GROUP
+LOAD /usr/lib/gcc/x86_64-linux-gnu/9/libgcc.a
+LOAD /usr/lib/gcc/x86_64-linux-gnu/9/libgcc_s.so
+START GROUP
+LOAD /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/libgcc_s.so.1
+LOAD /usr/lib/gcc/x86_64-linux-gnu/9/libgcc.a
+END GROUP
+LOAD /usr/lib/gcc/x86_64-linux-gnu/9/crtendS.o
+LOAD /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/crtn.o
+                [!provide]                        PROVIDE (__executable_start = SEGMENT_START ("text-segment", 0x0))
+                0x00000000000002a8                . = (SEGMENT_START ("text-segment", 0x0) + SIZEOF_HEADERS)
+
+.interp         0x00000000000002a8       0x1c
+ *(.interp)
+ .interp        0x00000000000002a8       0x1c /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o
+
+.note.gnu.build-id
+                0x00000000000002c4       0x24
+ *(.note.gnu.build-id)
+ .note.gnu.build-id
+                0x00000000000002c4       0x24 /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o
+
+.note.ABI-tag   0x00000000000002e8       0x20
+ .note.ABI-tag  0x00000000000002e8       0x20 /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o
+
+.hash
+ *(.hash)
+
+.gnu.hash       0x0000000000000308       0x28
+ *(.gnu.hash)
+ .gnu.hash      0x0000000000000308       0x28 /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o
+
+.dynsym         0x0000000000000330      0x108
+ *(.dynsym)
+ .dynsym        0x0000000000000330      0x108 /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o
+
+.dynstr         0x0000000000000438       0xaf
+ *(.dynstr)
+ .dynstr        0x0000000000000438       0xaf /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o
+
+.gnu.version    0x00000000000004e8       0x16
+ *(.gnu.version)
+ .gnu.version   0x00000000000004e8       0x16 /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o
+
+.gnu.version_d  0x0000000000000500        0x0
+ *(.gnu.version_d)
+ .gnu.version_d
+                0x0000000000000500        0x0 /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o
+
+.gnu.version_r  0x0000000000000500       0x30
+ *(.gnu.version_r)
+ .gnu.version_r
+                0x0000000000000500       0x30 /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o
+
+.rela.dyn       0x0000000000000530       0xd8
+ *(.rela.init)
+ *(.rela.text .rela.text.* .rela.gnu.linkonce.t.*)
+ .rela.text     0x0000000000000530        0x0 /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o
+ *(.rela.fini)
+ *(.rela.rodata .rela.rodata.* .rela.gnu.linkonce.r.*)
+ *(.rela.data .rela.data.* .rela.gnu.linkonce.d.*)
+ .rela.data.rel.ro
+                0x0000000000000530        0x0 /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o
+ .rela.data.rel.local
+                0x0000000000000530       0x18 /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o
+ *(.rela.tdata .rela.tdata.* .rela.gnu.linkonce.td.*)
+ *(.rela.tbss .rela.tbss.* .rela.gnu.linkonce.tb.*)
+ *(.rela.ctors)
+ *(.rela.dtors)
+ *(.rela.got)
+ .rela.got      0x0000000000000548       0x78 /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o
+ *(.rela.bss .rela.bss.* .rela.gnu.linkonce.b.*)
+ .rela.bss      0x00000000000005c0       0x18 /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o
+ *(.rela.ldata .rela.ldata.* .rela.gnu.linkonce.l.*)
+ *(.rela.lbss .rela.lbss.* .rela.gnu.linkonce.lb.*)
+ *(.rela.lrodata .rela.lrodata.* .rela.gnu.linkonce.lr.*)
+ *(.rela.ifunc)
+ .rela.ifunc    0x00000000000005d8        0x0 /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o
+ .rela.fini_array
+                0x00000000000005d8       0x18 /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o
+ .rela.init_array
+                0x00000000000005f0       0x18 /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o
+
+.rela.plt       0x0000000000000608       0x60
+ *(.rela.plt)
+ .rela.plt      0x0000000000000608       0x60 /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o
+ *(.rela.iplt)
+                0x0000000000001000                . = ALIGN (CONSTANT (MAXPAGESIZE))
+
+.init           0x0000000000001000       0x1b
+ *(SORT_NONE(.init))
+ .init          0x0000000000001000       0x16 /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/crti.o
+                0x0000000000001000                _init
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+
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+                0x0000000000001040                __stack_chk_fail@@GLIBC_2.4
+                0x0000000000001050                fgetc@@GLIBC_2.2.5
+                0x0000000000001060                fopen@@GLIBC_2.2.5
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+                0x0000000000001070                __cxa_finalize@@GLIBC_2.2.5
+
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+ *(.plt.sec)
+
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+ *(.text.unlikely .text.*_unlikely .text.unlikely.*)
+ *(.text.exit .text.exit.*)
+ *(.text.startup .text.startup.*)
+ *(.text.hot .text.hot.*)
+ *(SORT_BY_NAME(.text.sorted.*))
+ *(.text .stub .text.* .gnu.linkonce.t.*)
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+                0x0000000000001080                _start
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+ *fill*         0x00000000000010af        0x1 
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+                0x00000000000011a3                echo
+                0x00000000000011e7                main
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+                0x0000000000001240                __libc_csu_init
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+ .text          0x00000000000012b5        0x0 /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/crtn.o
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+
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+                0x00000000000012b8                _fini
+ .fini          0x00000000000012c0        0x5 /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/crtn.o
+                [!provide]                        PROVIDE (__etext = .)
+                [!provide]                        PROVIDE (_etext = .)
+                [!provide]                        PROVIDE (etext = .)
+                0x0000000000002000                . = ALIGN (CONSTANT (MAXPAGESIZE))
+                0x0000000000002000                . = SEGMENT_START ("rodata-segment", (ALIGN (CONSTANT (MAXPAGESIZE)) + (. & (CONSTANT (MAXPAGESIZE) - 0x1))))
+
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+ *(.rodata .rodata.* .gnu.linkonce.r.*)
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+                0x0000000000002000                _IO_stdin_used
+ .rodata.str1.1
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+
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+                0x0000000000002008                __GNU_EH_FRAME_HDR
+ *(.eh_frame_entry .eh_frame_entry.*)
+
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+                                         0x2c (size before relaxing)
+ *fill*         0x0000000000002070        0x0 
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+                                         0x40 (size before relaxing)
+ .eh_frame      0x0000000000002098       0x18 /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o
+                                         0x30 (size before relaxing)
+ .eh_frame      0x00000000000020b0       0x5c /usr/lib/x86_64-linux-gnu/libc_nonshared.a(elf-init.oS)
+                                         0x78 (size before relaxing)
+ .eh_frame      0x000000000000210c        0x4 /usr/lib/gcc/x86_64-linux-gnu/9/crtendS.o
+ *(.eh_frame.*)
+
+.gcc_except_table
+ *(.gcc_except_table .gcc_except_table.*)
+
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+ *(.gnu_extab*)
+
+.exception_ranges
+ *(.exception_ranges*)
+                0x0000000000003da0                . = DATA_SEGMENT_ALIGN (CONSTANT (MAXPAGESIZE), CONSTANT (COMMONPAGESIZE))
+
+.eh_frame
+ *(.eh_frame)
+ *(.eh_frame.*)
+
+.gnu_extab
+ *(.gnu_extab)
+
+.gcc_except_table
+ *(.gcc_except_table .gcc_except_table.*)
+
+.exception_ranges
+ *(.exception_ranges*)
+
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+                [!provide]                        PROVIDE (__tdata_start = .)
+ *(.tdata .tdata.* .gnu.linkonce.td.*)
+
+.tbss
+ *(.tbss .tbss.* .gnu.linkonce.tb.*)
+ *(.tcommon)
+
+.preinit_array  0x0000000000003da0        0x0
+                [!provide]                        PROVIDE (__preinit_array_start = .)
+ *(.preinit_array)
+                [!provide]                        PROVIDE (__preinit_array_end = .)
+
+.init_array     0x0000000000003da0        0x8
+                0x0000000000003da0                PROVIDE (__init_array_start = .)
+ *(SORT_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*))
+ *(.init_array EXCLUDE_FILE(*crtend?.o *crtend.o *crtbegin?.o *crtbegin.o) .ctors)
+ .init_array    0x0000000000003da0        0x8 /usr/lib/gcc/x86_64-linux-gnu/9/crtbeginS.o
+                0x0000000000003da8                PROVIDE (__init_array_end = .)
+
+.fini_array     0x0000000000003da8        0x8
+                [!provide]                        PROVIDE (__fini_array_start = .)
+ *(SORT_BY_INIT_PRIORITY(.fini_array.*) SORT_BY_INIT_PRIORITY(.dtors.*))
+ *(.fini_array EXCLUDE_FILE(*crtend?.o *crtend.o *crtbegin?.o *crtbegin.o) .dtors)
+ .fini_array    0x0000000000003da8        0x8 /usr/lib/gcc/x86_64-linux-gnu/9/crtbeginS.o
+                [!provide]                        PROVIDE (__fini_array_end = .)
+
+.ctors
+ *crtbegin.o(.ctors)
+ *crtbegin?.o(.ctors)
+ *(EXCLUDE_FILE(*crtend?.o *crtend.o) .ctors)
+ *(SORT_BY_NAME(.ctors.*))
+ *(.ctors)
+
+.dtors
+ *crtbegin.o(.dtors)
+ *crtbegin?.o(.dtors)
+ *(EXCLUDE_FILE(*crtend?.o *crtend.o) .dtors)
+ *(SORT_BY_NAME(.dtors.*))
+ *(.dtors)
+
+.jcr
+ *(.jcr)
+
+.data.rel.ro    0x0000000000003db0        0x0
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+ *(.data.rel.ro .data.rel.ro.* .gnu.linkonce.d.rel.ro.*)
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+
+.dynamic        0x0000000000003db0      0x1f0
+ *(.dynamic)
+ .dynamic       0x0000000000003db0      0x1f0 /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o
+                0x0000000000003db0                _DYNAMIC
+
+.got            0x0000000000003fa0       0x60
+ *(.got.plt)
+ .got.plt       0x0000000000003fa0       0x38 /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o
+                0x0000000000003fa0                _GLOBAL_OFFSET_TABLE_
+ *(.igot.plt)
+ *(.got)
+ .got           0x0000000000003fd8       0x28 /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o
+ *(.igot)
+                0x0000000000004000                . = DATA_SEGMENT_RELRO_END (., 0x0)
+
+.data           0x0000000000004000       0x10
+ *(.data .data.* .gnu.linkonce.d.*)
+ .data          0x0000000000004000        0x4 /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o
+                0x0000000000004000                data_start
+                0x0000000000004000                __data_start
+ .data          0x0000000000004004        0x0 /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/crti.o
+ .data          0x0000000000004004        0x0 /usr/lib/gcc/x86_64-linux-gnu/9/crtbeginS.o
+ *fill*         0x0000000000004004        0x4 
+ .data.rel.local
+                0x0000000000004008        0x8 /usr/lib/gcc/x86_64-linux-gnu/9/crtbeginS.o
+                0x0000000000004008                __dso_handle
+ .data          0x0000000000004010        0x0 ropex.o
+ .data          0x0000000000004010        0x0 gadget.o
+ .data          0x0000000000004010        0x0 /usr/lib/x86_64-linux-gnu/libc_nonshared.a(elf-init.oS)
+ .data          0x0000000000004010        0x0 /usr/lib/gcc/x86_64-linux-gnu/9/crtendS.o
+ .data          0x0000000000004010        0x0 /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/crtn.o
+
+.tm_clone_table
+                0x0000000000004010        0x0
+ .tm_clone_table
+                0x0000000000004010        0x0 /usr/lib/gcc/x86_64-linux-gnu/9/crtbeginS.o
+ .tm_clone_table
+                0x0000000000004010        0x0 /usr/lib/gcc/x86_64-linux-gnu/9/crtendS.o
+
+.data1
+ *(.data1)
+                0x0000000000004010                _edata = .
+                [!provide]                        PROVIDE (edata = .)
+                0x0000000000004010                . = .
+                0x0000000000004010                __bss_start = .
+
+.bss            0x0000000000004010       0x10
+ *(.dynbss)
+ *fill*         0x0000000000004010        0x0 
+ .dynbss        0x0000000000004010        0x8 /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o
+                0x0000000000004010                stdin@@GLIBC_2.2.5
+ *(.bss .bss.* .gnu.linkonce.b.*)
+ .bss           0x0000000000004018        0x0 /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/Scrt1.o
+ .bss           0x0000000000004018        0x0 /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/crti.o
+ .bss           0x0000000000004018        0x1 /usr/lib/gcc/x86_64-linux-gnu/9/crtbeginS.o
+ .bss           0x0000000000004019        0x0 ropex.o
+ .bss           0x0000000000004019        0x0 gadget.o
+ .bss           0x0000000000004019        0x0 /usr/lib/x86_64-linux-gnu/libc_nonshared.a(elf-init.oS)
+ .bss           0x0000000000004019        0x0 /usr/lib/gcc/x86_64-linux-gnu/9/crtendS.o
+ .bss           0x0000000000004019        0x0 /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/crtn.o
+ *(COMMON)
+                0x0000000000004020                . = ALIGN ((. != 0x0)?0x8:0x1)
+ *fill*         0x0000000000004019        0x7 
+
+.lbss
+ *(.dynlbss)
+ *(.lbss .lbss.* .gnu.linkonce.lb.*)
+ *(LARGE_COMMON)
+                0x0000000000004020                . = ALIGN (0x8)
+                0x0000000000004020                . = SEGMENT_START ("ldata-segment", .)
+
+.lrodata
+ *(.lrodata .lrodata.* .gnu.linkonce.lr.*)
+
+.ldata          0x0000000000006020        0x0
+ *(.ldata .ldata.* .gnu.linkonce.l.*)
+                0x0000000000006020                . = ALIGN ((. != 0x0)?0x8:0x1)
+                0x0000000000006020                . = ALIGN (0x8)
+                0x0000000000004020                _end = .
+                [!provide]                        PROVIDE (end = .)
+                0x0000000000006020                . = DATA_SEGMENT_END (.)
+
+.stab
+ *(.stab)
+
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+ *(.stabstr)
+
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+
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+ *(.comment)
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+                                         0x2b (size before relaxing)
+ .comment       0x000000000000002a       0x2b ropex.o
+ .comment       0x000000000000002a       0x2b /usr/lib/gcc/x86_64-linux-gnu/9/crtendS.o
+
+.gnu.build.attributes
+ *(.gnu.build.attributes .gnu.build.attributes.*)
+
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+ *(.debug)
+
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+ *(.line)
+
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+
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+ *(.debug_aranges)
+ .debug_aranges
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+
+.debug_pubnames
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+
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+ *(.debug_info .gnu.linkonce.wi.*)
+ .debug_info    0x0000000000000000      0x49e ropex.o
+
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+ *(.debug_abbrev)
+ .debug_abbrev  0x0000000000000000      0x19b ropex.o
+
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+ *(.debug_line .debug_line.* .debug_line_end)
+ .debug_line    0x0000000000000000      0x188 ropex.o
+
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+ *(.debug_frame)
+ .debug_frame   0x0000000000000000       0xa8 ropex.o
+
+.debug_str      0x0000000000000000      0x2f4
+ *(.debug_str)
+ .debug_str     0x0000000000000000      0x2f4 ropex.o
+                                        0x333 (size before relaxing)
+
+.debug_loc      0x0000000000000000      0x254
+ *(.debug_loc)
+ .debug_loc     0x0000000000000000      0x254 ropex.o
+
+.debug_macinfo
+ *(.debug_macinfo)
+
+.debug_weaknames
+ *(.debug_weaknames)
+
+.debug_funcnames
+ *(.debug_funcnames)
+
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+ *(.debug_typenames)
+
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+ *(.debug_varnames)
+
+.debug_pubtypes
+ *(.debug_pubtypes)
+
+.debug_ranges
+ *(.debug_ranges)
+
+.debug_macro
+ *(.debug_macro)
+
+.debug_addr
+ *(.debug_addr)
+
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+ *(.gnu.attributes)
+
+/DISCARD/
+ *(.note.GNU-stack)
+ *(.gnu_debuglink)
+ *(.gnu.lto_*)
+OUTPUT(ropex elf64-x86-64)
diff --git a/Semestr 4/ask/lista9/test.c b/Semestr 4/ask/lista9/test.c
new file mode 100644
index 0000000..1dae111
--- /dev/null
+++ b/Semestr 4/ask/lista9/test.c
@@ -0,0 +1,7 @@
+void foobar() {}
+
+static const struct {
+  char a[3]; int b; long c; float pi;
+} baz = { "abc", 42, -3, 1.4142 };
+
+long array[100];
\ No newline at end of file
diff --git a/Semestr 4/ask/lista9/test.s b/Semestr 4/ask/lista9/test.s
new file mode 100644
index 0000000..5e60585
--- /dev/null
+++ b/Semestr 4/ask/lista9/test.s
@@ -0,0 +1,50 @@
+	.file	"test.c"
+	.text
+	.globl	foobar
+	.type	foobar, @function
+foobar:
+.LFB0:
+	.cfi_startproc
+	endbr64
+	pushq	%rbp
+	.cfi_def_cfa_offset 16
+	.cfi_offset 6, -16
+	movq	%rsp, %rbp
+	.cfi_def_cfa_register 6
+	nop
+	popq	%rbp
+	.cfi_def_cfa 7, 8
+	ret
+	.cfi_endproc
+.LFE0:
+	.size	foobar, .-foobar
+	.section	.rodata
+	.align 16
+	.type	baz, @object
+	.size	baz, 24
+baz:
+	.ascii	"abc"
+	.zero	1
+	.long	42
+	.quad	-3
+	.long	1068827777
+	.zero	4
+	.comm	array,800,32
+	.ident	"GCC: (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0"
+	.section	.note.GNU-stack,"",@progbits
+	.section	.note.gnu.property,"a"
+	.align 8
+	.long	 1f - 0f
+	.long	 4f - 1f
+	.long	 5
+0:
+	.string	 "GNU"
+1:
+	.align 8
+	.long	 0xc0000002
+	.long	 3f - 2f
+2:
+	.long	 0x3
+3:
+	.align 8
+4: