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defined external registers g and m

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SVN=126521
This commit is contained in:
Ken Thompson 2008-07-09 11:35:26 -07:00
parent 1e9adf8228
commit 7b454bb1d9
3 changed files with 20 additions and 14 deletions
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10
src/runtime/rt2_amd64.c
View File

@ -36,11 +36,11 @@ traceback(uint8 *pc, uint8 *sp, void* r15)
int32 counter;
int32 i;
int8* name;
U u;
G g;
Stktop *stktop;
// store local copy of per-process data block that we can write as we unwind
mcpy((byte*)&u, (byte*)r15, sizeof(U));
mcpy((byte*)&g, (byte*)r15, sizeof(G));
counter = 0;
name = "panic";
@ -48,9 +48,9 @@ traceback(uint8 *pc, uint8 *sp, void* r15)
callpc = pc;
if((uint8*)_morestack < pc && pc < (uint8*)_endmorestack) {
// call site in _morestack(); pop to earlier stack block to get true caller
stktop = (Stktop*)u.stackbase;
u.stackbase = stktop->oldbase;
u.stackguard = stktop->oldguard;
stktop = (Stktop*)g.stackbase;
g.stackbase = stktop->oldbase;
g.stackguard = stktop->oldguard;
sp = stktop->oldsp;
pc = ((uint8**)sp)[1];
sp += 16; // two irrelevant calls on stack - morestack, plus the call morestack made

5
src/runtime/runtime.c
View File

@ -571,9 +571,14 @@ check(void)
initsig();
}
extern register u;
uint32 a;
void
_newproc(byte* fn, int32 siz, byte* args)
{
a = u;
prints("_newproc fn=");
sys·printpointer(fn);
prints("; siz=");

19
src/runtime/runtime.h
View File

@ -2,7 +2,6 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
/*
* basic types
*/
@ -61,15 +60,15 @@ struct Map
int32 unused;
void (*fun[])(void);
};
typedef struct U U;
struct U
typedef struct G G;
struct G
{
byte* stackguard; // must not move
byte* stackbase; // must not move
U* ufor; // dbl ll of all u
U* ubak;
U* runqfor; // dbl ll of runnable
U* runqbak;
G* ufor; // dbl ll of all u
G* ubak;
G* runqfor; // dbl ll of runnable
G* runqbak;
};
typedef struct M M;
struct M
@ -77,13 +76,15 @@ struct M
byte* istackguard; // must not move
byte* istackbase; // must not move
};
extern register G* g; // R15
extern register M* m; // R14
/*
* global variables
*/
U* allu;
M* allm;
U* runq;
G* allu;
G* runq;
/*
* defined constants