From 358838cb335e88b4a0eb841d15e941c225a70b66 Mon Sep 17 00:00:00 2001
From: Nicolas Kruse <nicolas@nonan.net>
Date: Mon, 3 Nov 2025 21:51:58 +0100
Subject: [PATCH] New patch instruction for absolut addresses added
 PATCH_OBJECT_ABS

---
 src/copapy/_binwrite.py |  1 +
 src/copapy/_stencils.py |  6 +++++-
 src/coparun/runmem.c    | 10 ++++++++++
 src/coparun/runmem.h    |  1 +
 4 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/src/copapy/_binwrite.py b/src/copapy/_binwrite.py
index 036ff37..423436a 100644
--- a/src/copapy/_binwrite.py
+++ b/src/copapy/_binwrite.py
@@ -8,6 +8,7 @@ Command = Enum('Command', [('ALLOCATE_DATA', 1), ('COPY_DATA', 2),
                            ('ALLOCATE_CODE', 3), ('COPY_CODE', 4),
                            ('PATCH_FUNC', 0x1000), ('PATCH_OBJECT', 0x2000),
                            ('PATCH_OBJECT_HI21', 0x2001),
+                           ('PATCH_OBJECT_ABS', 0x2002),
                            ('ENTRY_POINT', 7),
                            ('RUN_PROG', 64), ('READ_DATA', 65),
                            ('END_COM', 256), ('FREE_MEMORY', 257), ('DUMP_CODE', 258)])
diff --git a/src/copapy/_stencils.py b/src/copapy/_stencils.py
index 269c72b..8a1164e 100644
--- a/src/copapy/_stencils.py
+++ b/src/copapy/_stencils.py
@@ -199,13 +199,17 @@ class stencil_database():
         elif pr.type.endswith('_LDST32_ABS_LO12_NC'):
             # (S + A) & 0xFFF
             mask = 0b11_1111_1111_1100_0000_0000
-            patch_value = (symbol_address + pr.fields['r_addend']) >> 2
+            patch_value = (symbol_address + pr.fields['r_addend'])
+            symbol_type = symbol_type + 0x02
+            scale = 4
             #print(f" *> {patch_value=} {symbol_address=} {pr.fields['r_addend']=}, {function_offset=}")
 
         elif pr.type.endswith('_LDST64_ABS_LO12_NC'):
             # (S + A) & 0xFFF
             mask = 0b11_1111_1111_1100_0000_0000
             patch_value = (symbol_address + pr.fields['r_addend']) >> 3
+            symbol_type = symbol_type + 0x02
+            scale = 8
             #print(f" *> {patch_value=} {symbol_address=} {pr.fields['r_addend']=}, {function_offset=}")
 
         else:
diff --git a/src/coparun/runmem.c b/src/coparun/runmem.c
index 588bdb5..78d22e6 100644
--- a/src/coparun/runmem.c
+++ b/src/coparun/runmem.c
@@ -140,6 +140,16 @@ int parse_commands(uint8_t *bytes) {
                 patch(executable_memory + offs, patch_mask, value / patch_scale + data_offs / patch_scale);
                 break;
 
+            case PATCH_OBJECT_ABS:
+                offs = *(uint32_t*)bytes; bytes += 4;
+                patch_mask = *(uint32_t*)bytes; bytes += 4;
+                patch_scale = *(int32_t*)bytes; bytes += 4;
+                value = *(int32_t*)bytes; bytes += 4;
+                LOG("PATCH_OBJECT_ABS patch_offs=%i patch_mask=%#08x scale=%i value=%i\n",
+                    offs, patch_mask, patch_scale, value);
+                patch(executable_memory + offs, patch_mask, value / patch_scale);
+                break;
+
             case PATCH_OBJECT_HI21:
                 offs = *(uint32_t*)bytes; bytes += 4;
                 patch_mask = *(uint32_t*)bytes; bytes += 4;
diff --git a/src/coparun/runmem.h b/src/coparun/runmem.h
index f384e78..aab6dfa 100644
--- a/src/coparun/runmem.h
+++ b/src/coparun/runmem.h
@@ -11,6 +11,7 @@
 #define PATCH_FUNC        0x1000
 #define PATCH_OBJECT      0x2000
 #define PATCH_OBJECT_HI21 0x2001
+#define PATCH_OBJECT_ABS  0x2002
 #define ENTRY_POINT       7
 #define RUN_PROG         64
 #define READ_DATA        65