add drawing

1 files changed, 19 insertions, 5 deletions

diff --git a/procfs.c b/procfs.c
index 2558f03..1e70274 100644
--- a/procfs.c
+++ b/procfs.c
@@ -75,14 +75,28 @@ err:
 	return -1;
 }
 
-int read_page(int fd, uintptr_t index, uint8_t *data) {
-	if (lseek(fd, index * PAGE_SIZE, SEEK_SET) == -1) 
-		return -1;
+int read_mem(int fd, uintptr_t addr, uint8_t *data, size_t size) {
+	if (lseek(fd, addr, SEEK_SET) == -1) return -1;
 	size_t n = 0;
-	while (n < PAGE_SIZE) {
-		ssize_t result = read(fd, data + n, PAGE_SIZE - n);
+	while (n < size) {
+		ssize_t result = read(fd, data + n, size - n);
 		if (result == -1) return -1;
 		n += result;
 	}
 	return 0;
 }
+
+int write_mem(int fd, uintptr_t addr, uint8_t *data, size_t size) {
+	if (lseek(fd, addr, SEEK_SET) == -1) return -1;
+	size_t n = 0;
+	while (n < size) {
+		ssize_t result = write(fd, data + n, size - n);
+		if (result == -1) return -1;
+		n += result;
+	}
+	return 0;
+}
+
+int read_page(int fd, uintptr_t index, uint8_t *data) {
+	return read_mem(fd, index * PAGE_SIZE, data, PAGE_SIZE);
+}