From ca131c71e82bd70c2b52bacb1ba6eb27a2c33d1d Mon Sep 17 00:00:00 2001
From: Xnoe <xnoe@xnoe.moe>
Date: Wed, 8 Dec 2021 18:48:24 +0000
Subject: [PATCH] Updated hello.c to print the program's PID. Add getPID
 syscall.

---
 src/common/common.c |  4 ++++
 src/common/common.h |  2 ++
 src/program/hello.c | 11 ++++++++++-
 3 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/src/common/common.c b/src/common/common.c
index 28dcfae..bc9b182 100644
--- a/src/common/common.c
+++ b/src/common/common.c
@@ -28,6 +28,10 @@ uint32_t filesize(char* filename) {
   asm volatile ("mov $6, %%eax; mov %0, %%esi; int $0x7f" : : "m" (filename) : "esi");
 }
 
+uint32_t getPID() {
+  asm volatile ("mov $8, %%eax; int $0x7f" : : :);
+}
+
 int int_to_decimal(unsigned int number, char* string_buffer) {
   for (int i=0; i<11; i++)
     string_buffer[i] = 0;
diff --git a/src/common/common.h b/src/common/common.h
index bde0021..b71bb0c 100644
--- a/src/common/common.h
+++ b/src/common/common.h
@@ -11,6 +11,8 @@ void* localalloc(uint32_t size);
 void localdelete(void* ptr);
 uint32_t filesize(char* filename);
 
+uint32_t getPID();
+
 int int_to_decimal(unsigned int number, char* string_buffer);
 int int_to_hex(unsigned int number, char* string_buffer);
 
diff --git a/src/program/hello.c b/src/program/hello.c
index 3dbaccb..717a8aa 100644
--- a/src/program/hello.c
+++ b/src/program/hello.c
@@ -1,7 +1,16 @@
 #include "../common/common.h"
 
 int main() {
+  uint32_t counter = 0;
+  uint32_t PID = getPID();
+  char intbuffer[32];
+  uint32_t index = int_to_decimal(PID, intbuffer);
   while (1) {
-    // print("Hello");
+    counter++;
+    if (counter == 312500) {
+      print(intbuffer+index);
+      print(" ");
+      counter = 0;
+    }
   }
 }
\ No newline at end of file