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cmd/5g, cmd/6g, cmd/8g: provide embedded trampolines with argument size information

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An embedded trampoline is a function that exists to marshal
a receiver of type *S to a receiver of type *T when T is an
embedded field in S.

Embedded trampolines are generated by a special path through
the compiler and are not subject to the general analysis and
annotation done to functions.  Their effects must be provided
explicitly.

R=golang-dev, r, daniel.morsing, minux.ma
CC=golang-dev
https://golang.org/cl/9874043
This commit is contained in:
Carl Shapiro 2013-05-31 13:34:57 -07:00
parent 252161cadc
commit 31be5deae4
3 changed files with 9 additions and 6 deletions
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5
src/cmd/5g/gobj.c
View File

@ -548,8 +548,9 @@ out:
p->from.name = D_EXTERN;
p->from.sym = newnam;
p->to.type = D_CONST2;
p->reg = 7;
p->to.offset2 = 0;
p->to.offset = 0; // stack size
p->to.offset2 = rnd(method->type->argwid, widthptr); // argument size
p->reg = 7; // textflag
p->to.reg = NREG;
//print("1. %P\n", p);

5
src/cmd/6g/gobj.c
View File

@ -528,8 +528,9 @@ out:
p->from.type = D_EXTERN;
p->from.sym = newnam;
p->to.type = D_CONST;
p->to.offset = 0;
p->from.scale = 7;
p->to.offset = 0; // stack size
p->to.offset |= rnd(method->type->argwid, widthptr) << 32; // argument size
p->from.scale = 7; // textflag
//print("1. %P\n", p);
mov = AMOVQ;

5
src/cmd/8g/gobj.c
View File

@ -534,8 +534,9 @@ out:
p->from.type = D_EXTERN;
p->from.sym = newnam;
p->to.type = D_CONST;
p->to.offset = 0;
p->from.scale = 7;
p->to.offset = 0; // stack skize
p->to.offset2 = rnd(method->type->argwid, widthptr); // argument size
p->from.scale = 7; // textflag
//print("1. %P\n", p);
mov = AMOVL;