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Index: recipe/files/gcc/libunixlib/sys/stackalloc.c
===================================================================
--- recipe/files/gcc/libunixlib/sys/stackalloc.c (revision 5392)
+++ recipe/files/gcc/libunixlib/sys/stackalloc.c (working copy)
@@ -326,9 +326,36 @@
void
__stackalloc_init (void)
{
- /* The initial stack chunk is set up in _syslib.s
- __ul_memory.stack points 8 bytes below the base of the initial chunk
- There are also 8 bytes spare above the initial chunk */
+ /* The stack is set up in _syslib.s as follows:
+ *
+ * appspace_himem -------------
+ * 8 bytes - <-- dummytopblock
+ * Signalhandler SP ------------- -
+ * \
+ * \
+ * 3584 bytes \
+ * \
+ * } Signal handler chunk (4k)
+ * Signalhandler SL ------------- /
+ * /
+ * 512 bytes /
+ * /
+ * ------------- -
+ * 8 bytes - <-- signalhandlerblock (avoid!)
+ * Initial SP ------------- -
+ * \
+ * \
+ * 3560 bytes \
+ * \
+ * } Initial chunk (4k)
+ * Initial SL ------------- /
+ * /
+ * 536 bytes /
+ * /
+ * ------------- -
+ * 8 bytes - <-- initialblock
+ * __ulmemory.stack -------------
+ */
#ifdef DEBUG
debug_printf ("-- stackalloc_init: stack=%08x appspace_himem=%08x "
@@ -350,9 +377,14 @@
dummybottomblock = initialblock - 1;
dummybottomblock->startofcon = NULL;
+ /* Initialise the signal handler block */
dummytopblock = initialblock + 1;
dummytopblock->size = 1;
+ dummytopblock->startofcon = NULL;
+ dummytopblock += 1;
+ dummytopblock->size = 1;
+
freelist = NULL;
}
Index: recipe/files/gcc/libunixlib/sys/_syslib.s
===================================================================
--- recipe/files/gcc/libunixlib/sys/_syslib.s (revision 5392)
+++ recipe/files/gcc/libunixlib/sys/_syslib.s (working copy)
@@ -142,10 +142,11 @@
@ in a dynamic area because GCC might generate trampolines. In USR32
@ mode we could however.
- @ 8 bytes are needed above the initial chunk
+ @ Reserve the top 4K for the signal handler stack
+ @ 8 bytes are needed above the signal handler stack
@ for the stackalloc heap
- @ Reserve the top 4K for the signal handler stack
SUB sp, sp, #8
+
STR sp, [ip, #GBL_SIGNALHANDLER_SP]
@ The signal handler stack cannot be extended, so we don't need to
@ setup the chunk structure.
@@ -153,6 +154,10 @@
ADD sl, sp, #512
STR sl, [ip, #GBL_SIGNALHANDLER_SL]
+ @ Reserve a further 8 bytes above the initial chunk
+ @ for the stackalloc heap
+ SUB sp, sp, #8
+
SUB a1, sp, #4096
ADD sl, a1, #512 + CHUNK_OVERHEAD
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