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| author | iximeow <me@iximeow.net> | 2019-02-18 18:06:24 -0800 |
|---|---|---|
| committer | iximeow <me@iximeow.net> | 2020-01-12 17:28:07 -0800 |
| commit | f62de4c3eff32c4f3709d5d690671771fd453701 (patch) | |
| tree | 2e78ffb027068ccd80fcb0de8f28d6790016e577 /README.md | |
| parent | 4f0cb26cacd5bf7c42850407bfab29bdba5986e4 (diff) | |
add some notes in README
Diffstat (limited to 'README.md')
| -rw-r--r-- | README.md | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/README.md b/README.md new file mode 100644 index 0000000..ce8775d --- /dev/null +++ b/README.md @@ -0,0 +1,17 @@ +## ARM arch notes: + +### Register Names +Reproduced from [infocenter.arm.com](http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0473c/CJAJBFHC.html): +| Name | Maps To | Meaning | +| ---- | ------- | ------- | +| r0-r15 | r0-r15 | These are the the registers! | +| a1-a4 | r0-r3 | Argument, result, or scratch registers | +| v1-v8 | r4-r11 | Variable registers | +| sb | r9 | Static base register | +| fp | r11 | Frame pointer\* | +| ip | r12 | Intra-procedure call register | +| sp | r13 | Stack pointer | +| lr | r14 | link register | +| pc | r15 | program counter | + +\* `fp` does not appear to be explicitly referenced in ARM documentation, and mapping to r11 looks to be OS (Windows/Linux?) convention. |