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doc: use "high address/low address" instead of "top/bottom"

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The current document uses the "top" and "bottom" when talking
about the address within a frame, which may easily lead to
misunderstandings. This patch directly uses "high address"
and "low address" to make the expression clearer.

Change-Id: I7469330bbdc158672d7f0314fe6680ebdd9ab79a
Reviewed-on: https://go-review.googlesource.com/c/go/+/339369
Trust: fannie zhang <Fannie.Zhang@arm.com>
Reviewed-by: Austin Clements <austin@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
This commit is contained in:
fanzha02 2021-08-03 12:11:29 +08:00 committed by fannie zhang
parent f1dce319ff
commit 1f9c9d8530
3 changed files with 8 additions and 8 deletions
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8
doc/asm.html
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@ -166,7 +166,7 @@ jumps and branches.
</li> </li>
<li> <li>
<code>SP</code>: Stack pointer: top of stack. <code>SP</code>: Stack pointer: the highest address within the local stack frame.
</li> </li>
</ul> </ul>
@ -216,7 +216,7 @@ If a Go prototype does not name its result, the expected assembly name is <code>
The <code>SP</code> pseudo-register is a virtual stack pointer The <code>SP</code> pseudo-register is a virtual stack pointer
used to refer to frame-local variables and the arguments being used to refer to frame-local variables and the arguments being
prepared for function calls. prepared for function calls.
It points to the top of the local stack frame, so references should use negative offsets It points to the highest address within the local stack frame, so references should use negative offsets
in the range [−framesize, 0): in the range [−framesize, 0):
<code>x-8(SP)</code>, <code>y-4(SP)</code>, and so on. <code>x-8(SP)</code>, <code>y-4(SP)</code>, and so on.
</p> </p>
@ -409,7 +409,7 @@ The linker will choose one of the duplicates to use.
(For <code>TEXT</code> items.) (For <code>TEXT</code> items.)
Don't insert the preamble to check if the stack must be split. Don't insert the preamble to check if the stack must be split.
The frame for the routine, plus anything it calls, must fit in the The frame for the routine, plus anything it calls, must fit in the
spare space at the top of the stack segment. spare space remaining in the current stack segment.
Used to protect routines such as the stack splitting code itself. Used to protect routines such as the stack splitting code itself.
</li> </li>
<li> <li>
@ -460,7 +460,7 @@ Only valid on functions that declare a frame size of 0.
<code>TOPFRAME</code> = 2048 <code>TOPFRAME</code> = 2048
<br> <br>
(For <code>TEXT</code> items.) (For <code>TEXT</code> items.)
Function is the top of the call stack. Traceback should stop at this function. Function is the outermost frame of the call stack. Traceback should stop at this function.
</li> </li>
</ul> </ul>

4
src/cmd/internal/obj/textflag.go
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@ -49,8 +49,8 @@ const (
// Function can call reflect.Type.Method or reflect.Type.MethodByName. // Function can call reflect.Type.Method or reflect.Type.MethodByName.
REFLECTMETHOD = 1024 REFLECTMETHOD = 1024
// Function is the top of the call stack. Call stack unwinders should stop // Function is the outermost frame of the call stack. Call stack unwinders
// at this function. // should stop at this function.
TOPFRAME = 2048 TOPFRAME = 2048
// Function is an ABI wrapper. // Function is an ABI wrapper.

4
src/runtime/textflag.h
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@ -32,8 +32,8 @@
#define NOFRAME 512 #define NOFRAME 512
// Function can call reflect.Type.Method or reflect.Type.MethodByName. // Function can call reflect.Type.Method or reflect.Type.MethodByName.
#define REFLECTMETHOD 1024 #define REFLECTMETHOD 1024
// Function is the top of the call stack. Call stack unwinders should stop // Function is the outermost frame of the call stack. Call stack unwinders
// at this function. // should stop at this function.
#define TOPFRAME 2048 #define TOPFRAME 2048
// Function is an ABI wrapper. // Function is an ABI wrapper.
#define ABIWRAPPER 4096 #define ABIWRAPPER 4096