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| author | Jake Burkholder <jake@FreeBSD.org> | 2000-12-04 12:38:03 +0000 |
|---|---|---|
| committer | Jake Burkholder <jake@FreeBSD.org> | 2000-12-04 12:38:03 +0000 |
| commit | f315dbdbd454d1ac67b75e0d500f2f7e390617c3 (patch) | |
| tree | 2f5296c84cd2df389acd481edb91fbc5d84c69f4 /sys/amd64/include/mutex.h | |
| parent | 8dd431fcf711c7d6082d1169a7f2b9bf53e84d3b (diff) | |
| download | src-f315dbdbd454d1ac67b75e0d500f2f7e390617c3.tar.gz src-f315dbdbd454d1ac67b75e0d500f2f7e390617c3.zip | |
(1) Allow a stray lock prefix to be compiled out with the
MPLOCKED macro
(2) Use decimal 12 rather than hex 0xc in an addl
(3) Implement MTX_ENTER for the I386_CPU case
(4) Use semi-colons between instructions to allow MTX_ENTER
and MTX_ENTER_WITH_RECURSION to be assembled
(5) Use incl instead of incw to increment the recusion count
(6) 10 is not a valid label, use 7, 8 and 9 rather than 8, 9 and 10
(7) Sort numeric labels
Submitted by: bde (2, 4, and 5)
Notes
Notes:
svn path=/head/; revision=69570
Diffstat (limited to 'sys/amd64/include/mutex.h')
| -rw-r--r-- | sys/amd64/include/mutex.h | 40 |
1 files changed, 24 insertions, 16 deletions
diff --git a/sys/amd64/include/mutex.h b/sys/amd64/include/mutex.h index b9609931aeeb..4b9fe2c87560 100644 --- a/sys/amd64/include/mutex.h +++ b/sys/amd64/include/mutex.h @@ -92,7 +92,9 @@ extern char STR_SIEN[]; " call mtx_enter_hard;" \ " addl $8,%%esp;" \ " jmp 1f;" \ -"2: lock; orl $" _V(MTX_RECURSE) ",%1;" \ +"2:" \ +" " MPLOCKED "" \ +" orl $" _V(MTX_RECURSE) ",%1;" \ " incl %2;" \ "1:" \ "# getlock_sleep" \ @@ -119,7 +121,7 @@ extern char STR_SIEN[]; " pushl %4;" \ " pushl %5;" \ " call mtx_enter_hard;" /* mtx_enter_hard(mtxp, type, oflags) */ \ -" addl $0xc,%%esp;" \ +" addl $12,%%esp;" \ " jmp 1f;" \ "2: popl %2;" /* save flags */ \ "1:" \ @@ -260,6 +262,12 @@ extern char STR_SIEN[]; #if defined(I386_CPU) +#define MTX_ENTER(reg, lck) \ + pushf; \ + cli; \ + movl reg,lck+MTX_LOCK; \ + popl lck+MTX_SAVEINTR + #define MTX_EXIT(lck, reg) \ pushl lck+MTX_SAVEINTR; \ movl $ MTX_UNOWNED,lck+MTX_LOCK; \ @@ -268,8 +276,8 @@ extern char STR_SIEN[]; #else /* I386_CPU */ #define MTX_ENTER(reg, lck) \ - pushf \ - cli \ + pushf; \ + cli; \ 9: movl $ MTX_UNOWNED,%eax; \ MPLOCKED \ cmpxchgl reg,lck+MTX_LOCK; \ @@ -286,35 +294,35 @@ extern char STR_SIEN[]; popf #define MTX_ENTER_WITH_RECURSION(reg, lck) \ - pushf \ - cli \ + pushf; \ + cli; \ movl lck+MTX_LOCK,%eax; \ cmpl _curproc,%eax; \ - jne 9f; \ - incw lck+MTX_RECURS; \ + jne 7f; \ + incl lck+MTX_RECURSE; \ jmp 8f; \ -9: movl $ MTX_UNOWNED,%eax; \ +7: movl $ MTX_UNOWNED,%eax; \ MPLOCKED \ cmpxchgl reg,lck+MTX_LOCK; \ jnz 9b; \ popl lck+MTX_SAVEINTR; \ - jmp 10f; \ + jmp 9f; \ 8: add $4,%esp; \ -10: +9: #define MTX_EXIT_WITH_RECURSION(lck,reg) \ movl lck+MTX_RECURSE,%eax; \ decl %eax; \ - js 9f; \ + js 8f; \ movl %eax,lck+MTX_RECURSE; \ - jmp 8f; \ -9: pushl lck+MTX_SAVEINTR; \ + jmp 9f; \ +8: pushl lck+MTX_SAVEINTR; \ movl lck+MTX_LOCK,%eax; \ movl $ MTX_UNOWNED,reg; \ MPLOCKED \ cmpxchgl reg,lck+MTX_LOCK; \ - popf \ -8: + popf; \ +9: #endif /* I386_CPU */ #endif /* !LOCORE */ |