From bce944d1498eaa3b6940ee234c863b3548a66b37 Mon Sep 17 00:00:00 2001
From: Benji Dial <benji6283@gmail.com>
Date: Sun, 24 Jan 2021 12:00:11 -0500
Subject: graphics!

---
 src/user/runtimes/c/elf.ld    |  1 +
 src/user/runtimes/c/entry.asm | 42 ----------------------------------------
 src/user/runtimes/c/pcrt.asm  | 45 +++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 46 insertions(+), 42 deletions(-)
 delete mode 100644 src/user/runtimes/c/entry.asm
 create mode 100644 src/user/runtimes/c/pcrt.asm

(limited to 'src/user/runtimes/c')

diff --git a/src/user/runtimes/c/elf.ld b/src/user/runtimes/c/elf.ld
index f321be2..3e9a034 100644
--- a/src/user/runtimes/c/elf.ld
+++ b/src/user/runtimes/c/elf.ld
@@ -11,6 +11,7 @@ SECTIONS {
   .__pcrt_before_main : {
     __pcrt_before_main_start = .;
     *(.__pcrt_before_main)
+    *(.init_array)
     __pcrt_before_main_end = .;
   }
 
diff --git a/src/user/runtimes/c/entry.asm b/src/user/runtimes/c/entry.asm
deleted file mode 100644
index bba8060..0000000
--- a/src/user/runtimes/c/entry.asm
+++ /dev/null
@@ -1,42 +0,0 @@
-bits 32
-
-global __pcrt_entry
-global __pcrt_quit
-
-extern main
-extern __pcrt_before_main_start
-extern __pcrt_before_main_end
-extern __pcrt_before_quit_start
-extern __pcrt_before_quit_end
-
-section .text
-__pcrt_entry:
-  mov esp, stack
-  push edx
-
-  mov ebx, __pcrt_before_main_start
-.before_main_loop:
-  cmp ebx, __pcrt_before_main_end
-  je .call_main
-  call dword [ebx]
-  add ebx, 4
-  jmp .before_main_loop
-
-.call_main:
-  call main
-
-__pcrt_quit:
-  mov ebx, __pcrt_before_quit_start
-.before_quit_loop:
-  cmp ebx, __pcrt_before_quit_end
-  je .end_task
-  call dword [ebx]
-  add ebx, 4
-  jmp .before_quit_loop
-
-.end_task:
-  int 0x38
-
-section .stack nobits alloc noexec write align=16
-resb 4096
-stack:
\ No newline at end of file
diff --git a/src/user/runtimes/c/pcrt.asm b/src/user/runtimes/c/pcrt.asm
new file mode 100644
index 0000000..85c898c
--- /dev/null
+++ b/src/user/runtimes/c/pcrt.asm
@@ -0,0 +1,45 @@
+bits 32
+
+global __pcrt_entry
+global __pcrt_quit
+global calling_task
+global stdio_task
+
+extern main
+extern __pcrt_before_main_start
+extern __pcrt_before_main_end
+extern __pcrt_before_quit_start
+extern __pcrt_before_quit_end
+
+section .text
+__pcrt_entry:
+  mov dword [calling_task], esi
+  mov dword [stdio_task], edi
+  push edx
+
+  mov ebx, __pcrt_before_main_start
+.before_main_loop:
+  cmp ebx, __pcrt_before_main_end
+  je .call_main
+  call dword [ebx]
+  add ebx, 4
+  jmp .before_main_loop
+
+.call_main:
+  call main
+
+__pcrt_quit:
+  mov ebx, __pcrt_before_quit_start
+.before_quit_loop:
+  cmp ebx, __pcrt_before_quit_end
+  je .end_task
+  call dword [ebx]
+  add ebx, 4
+  jmp .before_quit_loop
+
+.end_task:
+  int 0x38
+
+section .bss
+calling_task resd 1
+stdio_task resd 1
\ No newline at end of file
-- 
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