CalvinBackup/Embedded-Hacking
1
0
Fork 0
mirror of https://github.com/mytechnotalent/Embedded-Hacking.git synced 2026-08-24 11:52:50 +02:00
Code Issues Packages Projects Releases Wiki Activity

Updated WEEK01

Browse Source
This commit is contained in:
Kevin Thomas
2026-05-03 11:53:33 -04:00
parent ad6cf27df6
commit d990412a44
6 changed files with 5084 additions and 61 deletions
Download Patch File Download Diff File Expand all files Collapse all files
WEEK01/WEEK01-03-S.md
+2 -2
View File
@@ -27,7 +27,7 @@ The data reference is at **`0x10000244`** (labeled `DAT_10000244` in Ghidra). Th
##### Question 3: Is it a read or write operation? Why?
It is a **READ** operation. The `ldr` (Load Register) instruction reads the pointer value from `DAT_10000244` into register `r0`. The program needs to read this pointer to pass the string address as an argument to `__wrap_puts`.
##### Question 4: What happens next?
##### Question 4: What happens next after the `ldr`?
After the `ldr r0, [DAT_10000244]` instruction loads the string address into `r0`, the next instruction is **`bl 0x100015fc <__wrap_puts>`** which calls the `puts` function with `r0` as its argument (the string pointer).
##### Question 5: Complete Data Flow Chain
@@ -42,7 +42,7 @@ Pointer to string stored at DAT_10000244 (0x10000244)
main() executes: ldr r0, [DAT_10000244] -> r0 = 0x100019CC
|
v
main() executes: bl __wrap_puts -> prints the string
main() executes: bl __wrap_puts -> prints the string
|
v
main() executes: b.n main+6 -> loops back (infinite loop)