* RE: syscall register clobber list
@ 2002-10-24 16:10 Ed Swarthout
0 siblings, 0 replies; 3+ messages in thread
From: Ed Swarthout @ 2002-10-24 16:10 UTC (permalink / raw)
To: Franz.Sirl-ppc; +Cc: linuxppc-dev
Franz wrote:
> I'm currently testing a more comprehensive patch, which I will
> submit soon (see the stuff in current glibc cvs to get a glimpse).
Great.
> Out of interest, what are you building that needs these macros?
Just defining __KERNEL_SYSCALLS__ and including linux/unistd.h
causes the errors. linux/init/main.c does this.
Ed
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: syscall register clobber list
2002-10-23 22:24 Ed Swarthout
@ 2002-10-24 8:01 ` Franz Sirl
0 siblings, 0 replies; 3+ messages in thread
From: Franz Sirl @ 2002-10-24 8:01 UTC (permalink / raw)
To: Ed Swarthout; +Cc: linuxppc-dev
At 00:24 24.10.2002, Ed Swarthout wrote:
>asm-ppc/unistd.h is sloppy with the register clobber list for some of
>the _syscallX macros. gcc with this fix:
>
> http://gcc.gnu.org/ml/gcc/2002-09/msg00741.html
>
>will issue a bunch of error messages like this:
>
> include/asm/unistd.h:439: error:
> asm-specifier for variable `__sc_4' conflicts with asm clobber list
I'm currently testing a more comprehensive patch, which I will submit soon
(see the stuff in current glibc cvs to get a glimpse).
Out of interest, what are you building that needs these macros?
Franz.
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
^ permalink raw reply [flat|nested] 3+ messages in thread
* syscall register clobber list
@ 2002-10-23 22:24 Ed Swarthout
2002-10-24 8:01 ` Franz Sirl
0 siblings, 1 reply; 3+ messages in thread
From: Ed Swarthout @ 2002-10-23 22:24 UTC (permalink / raw)
To: linuxppc-dev
asm-ppc/unistd.h is sloppy with the register clobber list for some of
the _syscallX macros. gcc with this fix:
http://gcc.gnu.org/ml/gcc/2002-09/msg00741.html
will issue a bunch of error messages like this:
include/asm/unistd.h:439: error:
asm-specifier for variable `__sc_4' conflicts with asm clobber list
Here's a patch:
Index: unistd.h
===================================================================
RCS file: /cvsroot/linuxppc/linuxppc_2_4_devel/include/asm-ppc/unistd.h,v
retrieving revision 1.1.1.2
diff -u -r1.1.1.2 unistd.h
--- unistd.h 2002/09/14 05:22:43 1.1.1.2
+++ unistd.h 2002/10/23 21:56:45
@@ -249,8 +249,16 @@
return (__sc_err & 0x10000000 ? errno = __sc_ret, __sc_ret = -1 : 0), \
(type) __sc_ret
-#define __syscall_clobbers \
+#define __syscall_clobbers_4_12 \
"r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12"
+#define __syscall_clobbers_5_12 \
+ "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12"
+#define __syscall_clobbers_6_12 \
+ "r6", "r7", "r8", "r9", "r10", "r11", "r12"
+#define __syscall_clobbers_7_12 \
+ "r7", "r8", "r9", "r10", "r11", "r12"
+#define __syscall_clobbers_8_12 \
+ "r8", "r9", "r10", "r11", "r12"
#define _syscall0(type,name) \
type name(void) \
@@ -266,7 +274,7 @@
"mfcr %1 " \
: "=&r" (__sc_3), "=&r" (__sc_0) \
: "0" (__sc_3), "1" (__sc_0) \
- : __syscall_clobbers); \
+ : __syscall_clobbers_4_12); \
__sc_ret = __sc_3; \
__sc_err = __sc_0; \
} \
@@ -288,7 +296,7 @@
"mfcr %1 " \
: "=&r" (__sc_3), "=&r" (__sc_0) \
: "0" (__sc_3), "1" (__sc_0) \
- : __syscall_clobbers); \
+ : __syscall_clobbers_4_12); \
__sc_ret = __sc_3; \
__sc_err = __sc_0; \
} \
@@ -313,7 +321,7 @@
: "=&r" (__sc_3), "=&r" (__sc_0) \
: "0" (__sc_3), "1" (__sc_0), \
"r" (__sc_4) \
- : __syscall_clobbers); \
+ : __syscall_clobbers_5_12); \
__sc_ret = __sc_3; \
__sc_err = __sc_0; \
} \
@@ -341,7 +349,7 @@
: "0" (__sc_3), "1" (__sc_0), \
"r" (__sc_4), \
"r" (__sc_5) \
- : __syscall_clobbers); \
+ : __syscall_clobbers_6_12); \
__sc_ret = __sc_3; \
__sc_err = __sc_0; \
} \
@@ -372,7 +380,7 @@
"r" (__sc_4), \
"r" (__sc_5), \
"r" (__sc_6) \
- : __syscall_clobbers); \
+ : __syscall_clobbers_7_12); \
__sc_ret = __sc_3; \
__sc_err = __sc_0; \
} \
@@ -406,7 +414,7 @@
"r" (__sc_5), \
"r" (__sc_6), \
"r" (__sc_7) \
- : __syscall_clobbers); \
+ : __syscall_clobbers_8_12); \
__sc_ret = __sc_3; \
__sc_err = __sc_0; \
} \
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
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2002-10-24 8:01 ` Franz Sirl
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