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| author | Egon Elbre <egonelbre@gmail.com> | 2020-08-25 10:38:50 +0300 |
|---|---|---|
| committer | Keith Randall <khr@golang.org> | 2020-09-01 14:54:08 +0000 |
| commit | d7a6a44deb3a56aa3f94b75f7ab4ffa1a0fa8cef (patch) | |
| tree | ef3b88bc3f934a7adc6d9f98ec058057898b1b41 /doc/asm.html | |
| parent | 4d89b3231d590284e35bff647e597e93fdf41dae (diff) | |
| download | go-d7a6a44deb3a56aa3f94b75f7ab4ffa1a0fa8cef.tar.gz go-d7a6a44deb3a56aa3f94b75f7ab4ffa1a0fa8cef.zip | |
doc/asm: add BP is callee-save paragraph
Change-Id: Id38e639c66a42acf0b1c4488cdfd0b7b6cf71c78
Reviewed-on: https://go-review.googlesource.com/c/go/+/250397
Reviewed-by: Keith Randall <khr@golang.org>
Diffstat (limited to 'doc/asm.html')
| -rw-r--r-- | doc/asm.html | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/doc/asm.html b/doc/asm.html index dbbe8f2cd1..cc8598aeff 100644 --- a/doc/asm.html +++ b/doc/asm.html @@ -687,6 +687,13 @@ MOVQ g(CX), AX // Move g into AX. MOVQ g_m(AX), BX // Move g.m into BX. </pre> +<p> +Register <code>BP</code> is callee-save. +The assembler automatically inserts <code>BP</code> save/restore when frame size is larger than zero. +Using <code>BP</code> as a general purpose register is allowed, +however it can interfere with sampling-based profiling. +</p> + <h3 id="arm">ARM</h3> <p> |