commit 5eed6f031fb5521acbcbb4cc6e774bde5e646292
parent 737d6383066f71e032d9ae30a8741165ff21b435
Author: dwrz <dwrz@dwrz.net>
Date: Fri, 13 Nov 2020 03:34:31 +0000
Update x86 assembly slides
Diffstat:
1 file changed, 11 insertions(+), 4 deletions(-)
diff --git a/x86-assembly/slides.org b/x86-assembly/slides.org
@@ -205,7 +205,7 @@ void exit_group(int status);
* 18. Exit
-[[file:src/exit/exit.s:]]
+[[file:src/exit/exit.s]]
* 19. Assemble, Link, Execute, Trace
#+begin_src bash
@@ -237,12 +237,12 @@ strace ./exit
- Reverse Engineering
* 22. Instructions
+- Represented by numbers (opcodes).
- Describe an operation the CPU should perform, e.g.:
- Move data in and out of registers
- Modify register contents
- Modify stack
- Control program flow
-- Represented by numbers (opcodes).
* 23. Instruction Cycle
- On every tick of its internal clock, the CPU:
@@ -251,6 +251,14 @@ strace ./exit
- *Executes* the instruction.
- Increments the instruction pointer.
+#+begin_src bash
+hexdump -C exit
+#+end_src
+
+#+begin_src bash
+objdump -D exit
+#+end_src
+
* 24. Registers
- Storage on the CPU (fastest storage).
- Act as a scratchpad -- temporary variables.
@@ -285,7 +293,7 @@ Assembly sections refer to executable's memory layout:
| RODATA | --> const str = "Hello, World";
| DATA | --> var str = "Hello, World";
| BSS | --> var str;
-| ↓ HEAP ↓ |
+| ↓ HEAP ↓ | --> (for traditional C)
| |
| ↑ STACK ↑ |
|-----------|
@@ -385,7 +393,6 @@ node -e ""
- Davy Wybiral, [[https://www.youtube.com/playlist?list=PLmxT2pVYo5LB5EzTPZGfFN0c2GDiSXgQe][Intro to x86 Assembly Language]]
- Jennifer Rexford, [[https://www.cs.princeton.edu/courses/archive/fall05/cos217/][Princeton COS 217: Introduction to Programming Systems]]
-- [[https://en.wikipedia.org/wiki/Objdump][objdump]]
- [[https://en.wikipedia.org/wiki/Structured_program_theorem][Structured Program Theorem]]
- [[https://www.gnu.org/software/gdb/][GDB]]
- [[https://www.youtube.com/watch?v=tpIctyqH29Q&list=PL8dPuuaLjXtNlUrzyH5r6jN9ulIgZBpdo][Crash Course: Computer Science]]
