Change from alloca() to malloc()

git-svn-id: svn://svn.berlios.de/openocd/trunk@2407 b42882b7-edfa-0310-969c-e2dbd0fdcd60

diff --git a/src/flash/at91sam3.c b/src/flash/at91sam3.c
index 70377ad8870a0ad4c85e81db1f9ad9e747ad1bd6..e0429ce5b5252ad474178738cc8f0e6341337968 100644 (file)
--- a/src/flash/at91sam3.c
+++ b/src/flash/at91sam3.c
@@ -2121,19 +2121,25 @@ sam3_write(struct flash_bank_s *bank,
        struct sam3_bank_private *pPrivate;
        uint8_t *pagebuffer;
 
+       // incase we bail further below, set this to null
+       pagebuffer = NULL;
+
        // ignore dumb requests
        if (count == 0) {
-               return ERROR_OK;
+               r = ERROR_OK;
+               goto done;
        }
 
        if (bank->target->state != TARGET_HALTED) {
                LOG_ERROR("Target not halted");
-               return ERROR_TARGET_NOT_HALTED;
+               r = ERROR_TARGET_NOT_HALTED;
+               goto done;
        }
 
        pPrivate = get_sam3_bank_private(bank);
        if (!(pPrivate->probed)) {
-               return ERROR_FLASH_BANK_NOT_PROBED;
+               r = ERROR_FLASH_BANK_NOT_PROBED;
+               goto done;
        }
 
 
@@ -2143,10 +2149,16 @@ sam3_write(struct flash_bank_s *bank,
                                  (unsigned int)(offset),
                                  (unsigned int)(count),
                                  (unsigned int)(pPrivate->size_bytes));
-               return ERROR_FAIL;
+               r = ERROR_FAIL;
+               goto done;
        }
 
-       pagebuffer = alloca(pPrivate->page_size);
+       pagebuffer = malloc(pPrivate->page_size);
+       if( !pagebuffer ){
+               LOG_ERROR("No memory for %d Byte page buffer", (int)(pPrivate->page_size));
+               r = ERROR_FAIL;
+               goto done;
+       }
 
        // what page do we start & end in?
        page_cur = offset / pPrivate->page_size;
@@ -2167,7 +2179,7 @@ sam3_write(struct flash_bank_s *bank,
                LOG_DEBUG("Special case, all in one page");
                r = sam3_page_read(pPrivate, page_cur, pagebuffer);
                if (r != ERROR_OK) {
-                       return r;
+                       goto done;
                }
 
                page_offset = (offset & (pPrivate->page_size-1));
@@ -2177,9 +2189,10 @@ sam3_write(struct flash_bank_s *bank,
 
                r = sam3_page_write(pPrivate, page_cur, pagebuffer);
                if (r != ERROR_OK) {
-                       return r;
+                       goto done;
                }
-               return ERROR_OK;
+               r = ERROR_OK;
+               goto done;
        }
 
        // non-aligned start
@@ -2189,7 +2202,7 @@ sam3_write(struct flash_bank_s *bank,
                // read the partial
                r = sam3_page_read(pPrivate, page_cur, pagebuffer);
                if (r != ERROR_OK) {
-                       return r;
+                       goto done;
                }
 
                // over-write with new data
@@ -2200,7 +2213,7 @@ sam3_write(struct flash_bank_s *bank,
 
                r = sam3_page_write(pPrivate, page_cur, pagebuffer);
                if (r != ERROR_OK) {
-                       return r;
+                       goto done;
                }
 
                count  -= n;
@@ -2219,7 +2232,7 @@ sam3_write(struct flash_bank_s *bank,
                   (count >= pPrivate->page_size)) {
                r = sam3_page_write(pPrivate, page_cur, buffer);
                if (r != ERROR_OK) {
-                       return r;
+                       goto done;
                }
                count    -= pPrivate->page_size;
                buffer   += pPrivate->page_size;
@@ -2232,19 +2245,24 @@ sam3_write(struct flash_bank_s *bank,
                // we have a partial page
                r = sam3_page_read(pPrivate, page_cur, pagebuffer);
                if (r != ERROR_OK) {
-                       return r;
+                       goto done;
                }
                // data goes at start
                memcpy(pagebuffer, buffer, count);
                r = sam3_page_write(pPrivate, page_cur, pagebuffer);
                if (r != ERROR_OK) {
-                       return r;
+                       goto done;
                }
                buffer += count;
                count  -= count;
        }
        LOG_DEBUG("Done!");
-       return ERROR_OK;
+       r = ERROR_OK;
+ done:
+       if( pagebuffer ){
+               free(pagebuffer);
+       }
+       return r;
 }
 
 static int