os

commit 82543c91aae01d0798fe0cff438a9e8904037eb0
parent 09b26a0a50456b5eaf779fcc1d1322eef10732ab
Author: erai <erai@omiltem.net>
Date:   Sat, 15 Feb 2025 20:53:01 +0000

fewer magic numbers in alloc.om

Diffstat:
M
alloc.om
 | 
6
+++++-
M
syscall.om
 | 
8
++++++++

2 files changed, 13 insertions(+), 1 deletion(-)
diff --git a/alloc.om b/alloc.om
@@ -22,10 +22,14 @@ func alloc(c: *alloc, size: int): *byte {
 		die("invalid alloc");
 	}
 
+	if size == 0 {
+		return nil;
+	}
+
 	if (size >= 2048) {
 		size = size + 4095;
 		size = size & ~4095;
-		mret = mmap(0, size, 3, 0x22, -1, 0);
+		mret = mmap(0, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1, 0);
 		if (mret == -1) {
 			die("out of memory");
 		}
diff --git a/syscall.om b/syscall.om
@@ -22,6 +22,14 @@ enum {
 	POLLHUP = 0x10,
 	POLLNVAL = 0x20,
 
+	PROT_NONE = 0x0,
+	PROT_READ = 0x1,
+	PROT_WRITE = 0x2,
+	PROT_EXEC = 0x4,
+
+	MAP_PRIVATE = 0x02,
+	MAP_ANON = 0x20,
+
 	WNOHANG = 1,
 
 	SIG_DFL = 0,