From b5ebbd7406e87d19beee3760ef2417e1444a10d2 Mon Sep 17 00:00:00 2001
From: Amlal El Mahrouss <amlal.elmahrouss@icloud.com>
Date: Thu, 17 Oct 2024 08:16:38 +0200
Subject: FIX/IMP: A set of fixes and new features. (MHR-40, 46 and 47 related)

Signed-off-by: Amlal El Mahrouss <amlal.elmahrouss@icloud.com>
---
 dev/crt/src/hal/x86/base_alloc.cxx | 55 ++++++++++++++++++++++++++++++++++++++
 dev/crt/src/hal/x86/exit.cxx       | 19 +++++++++++++
 2 files changed, 74 insertions(+)
 create mode 100644 dev/crt/src/hal/x86/base_alloc.cxx
 create mode 100644 dev/crt/src/hal/x86/exit.cxx

(limited to 'dev/crt/src/hal')

diff --git a/dev/crt/src/hal/x86/base_alloc.cxx b/dev/crt/src/hal/x86/base_alloc.cxx
new file mode 100644
index 00000000..effb6c94
--- /dev/null
+++ b/dev/crt/src/hal/x86/base_alloc.cxx
@@ -0,0 +1,55 @@
+/* -------------------------------------------
+
+	Copyright ZKA Technologies.
+
+------------------------------------------- */
+
+#include <crt/base_alloc.hxx>
+#include <crt/base_exception.hxx>
+
+#define kAllocSyscallId "mov $10, %%r9\n\t"
+#define kFreeSyscallId	"mov $11, %%r9\n\t"
+
+void* operator new(size_t length)
+{
+	void* ptr = nullptr;
+
+	// do syscall according to PEF convention.
+	asm("mov %0, %%r8\n\t" kAllocSyscallId
+		"syscall"
+		: "=r"(ptr));
+
+	if (!ptr)
+	   std::__throw_bad_alloc();
+
+	return ptr;
+}
+
+void* operator new[](size_t length)
+{
+	ptr_type ptr = nullptr;
+
+	// do syscall according to PEF convention.
+	asm("mov %0, %%r8\n\t" kAllocSyscallId
+		"syscall"
+		: "=r"(ptr));
+
+	if (!ptr)
+		   std::__throw_bad_alloc();
+
+	return ptr;
+}
+
+void operator delete(void* ptr) noexcept
+{
+	asm("mov %0, %%r8\n\t" kFreeSyscallId
+		"syscall"
+		: "=r"(ptr));
+}
+
+void operator delete[](void* ptr) noexcept
+{
+	asm("mov %0, %%r8\n\t" kFreeSyscallId
+		"syscall"
+		: "=r"(ptr));
+}
diff --git a/dev/crt/src/hal/x86/exit.cxx b/dev/crt/src/hal/x86/exit.cxx
new file mode 100644
index 00000000..d593adf9
--- /dev/null
+++ b/dev/crt/src/hal/x86/exit.cxx
@@ -0,0 +1,19 @@
+/* -------------------------------------------
+
+	Copyright ZKA Technologies.
+
+------------------------------------------- */
+
+#include <crt/exit.hxx>
+
+#define kAllocSyscallId "mov $12, %%r9\n\t"
+
+/// @note Just here for building.
+extern "C" int exit(int code)
+{
+	asm("mov 0, %%r8\n\t" kAllocSyscallId
+		"syscall"
+		: "=r"(code));
+
+	return 1;
+}
-- 
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