Changeset d681c17 in mainline for uspace/libc/generic/as.c

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/generic/as.c (modified) (2 diffs)

uspace/libc/generic/as.c

@@ -37 +37 @@
 #include <unistd.h>
 #include <align.h>
+#include <types.h>
+
+/**
+ * Either 4*256M on 32-bit architecures or 16*256M on 64-bit architectures.
+ */
+#define MAX_HEAP_SIZE   (sizeof(uintptr_t)<<28)
 
 /** Create address space area.
@@ -142 +148 @@
         /* Set heapsize to some meaningful value */
         if (maxheapsize == -1)
-                set_maxheapsize(ALIGN_UP(USER_ADDRESS_SPACE_SIZE_ARCH >> 1, PAGE_SIZE));
+                set_maxheapsize(MAX_HEAP_SIZE);
         
         if (!last_allocated)