Changeset d681c17 in mainline for uspace/libc/include/stdio.h

Timestamp:

2006-09-05T14:52:11Z (18 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

5035eeb7

Parents:

2def788

Message:

sparc64 work.

• the syscall wrapper needs to use the "memory" clobber specifier to prevent over-optimization.
• on sparc64, the user address space spans the whole 64-bit space and therefore the macro USER_ADDRESS_SPACE_SIZE_ARCH, as it was defined, overflows to 0
• stop using USER_ADDRESS_SPACE_SIZE_ARCH and define MAX_HEAP_SIZE instead
• in our situation when kernel and user address spaces are separate, the G (global) bit cannot be used (there is no point in it anymore)
• add the DEBUG() macro to stdio.h; DEBUG() uses SYS_IO and is a good debugging tool for getting early userspace to work

File:

• uspace/libc/include/stdio.h (modified) (1 diff)

uspace/libc/include/stdio.h

@@ -41 +41 @@
 #define EOF (-1)
 
+#include <string.h>
 #include <io/stream.h>
+
+#define DEBUG(fmt, ...) \
+{ \
+        char buf[256]; \
+        int n; \
+        n = snprintf(buf, sizeof(buf), fmt, ##__VA_ARGS__); \
+        if (n > 0) \
+                (void) __SYSCALL3(SYS_IO, 1, (sysarg_t) buf, strlen(buf)); \
+}
 
 extern int getchar(void);