From: Matthias Kruk <m@m10k.eu>
Date: Mon, 18 Nov 2019 09:02:55 +0000 (+0900)
Subject: Directly map read-only regions instead of copying them, when forking a process
X-Git-Url: https://git.corax.cc/?a=commitdiff_plain;h=913429f2ca2ea3d28227393b76d770ea1beb21f4;p=corax

Directly map read-only regions instead of copying them, when forking a process
---

diff --git a/kernel/core/process.c b/kernel/core/process.c
index 118b977..edc7a86 100644
--- a/kernel/core/process.c
+++ b/kernel/core/process.c
@@ -172,9 +172,13 @@ int _fork_region(pg_dir_t *parent_dir, region_t *reg, void *data)
 
 		switch(reg->reg_type) {
 		case REGION_TEXT:
+		case REGION_RODATA:
+			/* .text and .rodata are read-only, so we might as well just map them */
+			ret_val = pg_dir_map_region(child_dir, parent_dir, reg);
+			break;
+
 		case REGION_BSS:
 		case REGION_DATA:
-		case REGION_RODATA:
 			/* copy the region and its contents */
 			ret_val = pg_dir_clone_region(child_dir, parent_dir, reg);
 			break;