nRF52: free up 800b more flash by removing vector table padding

Thanks to @fanoush for this! da38fac#commitcomment-135831015
espruino · Jan 10, 2024 · 08a0f7b · 08a0f7b
1 parent 9520746
commit 08a0f7b
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Showing 2 changed files with 6 additions and 1 deletion.
diff --git a/ChangeLog b/ChangeLog
@@ -1,4 +1,4 @@
-     2v21 : ...
+     2v21 : nRF52: free up 800b more flash by removing vector table padding
 
      2v20 : Ensure String.charCodeAt returns NaN for out of bounds chars
             Bangle.js2: When rendering overlays, *do not* use the current FG/BG color for 1 bit overlays

diff --git a/targetlibs/nrf5x_12/components/toolchain/gcc/gcc_startup_nrf52.S b/targetlibs/nrf5x_12/components/toolchain/gcc/gcc_startup_nrf52.S
@@ -130,6 +130,9 @@ __isr_vector:
     .long   I2S_IRQHandler
     .long   FPU_IRQHandler
     .long   0                           /*Reserved */
+
+#ifdef BIG_VECTOR_TABLE // see https://github.com/espruino/Espruino/commit/da38facc65a8855f70fd4e25024a9276d8d4c8e0#commitcomment-135831015
+/* 0xE0 = 224 */
     .long   0                           /*Reserved */
     .long   0                           /*Reserved */
     .long   0                           /*Reserved */
@@ -138,6 +141,7 @@ __isr_vector:
     .long   0                           /*Reserved */
     .long   0                           /*Reserved */
     .long   0                           /*Reserved */
+/* 0x100 = 256 */
     .long   0                           /*Reserved */
     .long   0                           /*Reserved */
     .long   0                           /*Reserved */
@@ -330,6 +334,7 @@ __isr_vector:
     .long   0                           /*Reserved */
     .long   0                           /*Reserved */
     .long   0                           /*Reserved */
+#endif
 
     .size __isr_vector, . - __isr_vector