diff --git a/core/os/os2/process_posix_darwin.odin b/core/os/os2/process_posix_darwin.odin
index 7625e513a..f655d42a9 100644
--- a/core/os/os2/process_posix_darwin.odin
+++ b/core/os/os2/process_posix_darwin.odin
@@ -13,7 +13,7 @@ import "core:time"
 foreign import lib "system:System"
 
 foreign lib {
-	sysctl :: proc(
+	sysctl :: proc "c" (
 		name: [^]i32, namelen: u32,
 		oldp: rawptr, oldlenp: ^uint,
 		newp: rawptr, newlen: uint,
diff --git a/core/os/os_wasi.odin b/core/os/os_wasi.odin
index 53c242a01..fe0a1fb3e 100644
--- a/core/os/os_wasi.odin
+++ b/core/os/os_wasi.odin
@@ -30,11 +30,11 @@ args := _alloc_command_line_arguments()
 @(private, require_results)
 _alloc_command_line_arguments :: proc "contextless" () -> []string {
 	context = runtime.default_context()
-	args := make([]string, len(runtime.args__))
-	for &arg, i in args {
+	cmd_args := make([]string, len(runtime.args__))
+	for &arg, i in cmd_args {
 		arg = string(runtime.args__[i])
 	}
-	return args
+	return cmd_args
 }
 
 @(private, fini)
@@ -59,9 +59,8 @@ Preopen :: struct {
 preopens: []Preopen
 
 @(init, private)
-init_preopens :: proc() {
-
-	strip_prefixes :: proc(path: string) -> string {
+init_preopens :: proc "contextless" () {
+	strip_prefixes :: proc "contextless"(path: string) -> string {
 		path := path
 		loop: for len(path) > 0 {
 			switch {
@@ -78,6 +77,8 @@ init_preopens :: proc() {
 		return path
 	}
 
+	context = runtime.default_context()
+
 	dyn_preopens: [dynamic]Preopen
 	loop: for fd := wasi.fd_t(3); ; fd += 1 {
 		desc, err := wasi.fd_prestat_get(fd)
diff --git a/core/sys/info/cpu_linux_riscv64.odin b/core/sys/info/cpu_linux_riscv64.odin
index 3d36d126d..39ed69240 100644
--- a/core/sys/info/cpu_linux_riscv64.odin
+++ b/core/sys/info/cpu_linux_riscv64.odin
@@ -7,7 +7,7 @@ import "base:intrinsics"
 import "core:sys/linux"
 
 @(init, private)
-init_cpu_features :: proc() {
+init_cpu_features :: proc "contextless" () {
 	_features: CPU_Features
 	defer cpu.features = _features
 
@@ -85,7 +85,7 @@ init_cpu_features :: proc() {
 			return
 		}
 
-		assert(pairs[0].key == .IMA_EXT_0)
+		assert_contextless(pairs[0].key == .IMA_EXT_0)
 		exts := pairs[0].value.ima_ext_0
 		exts -= { .FD, .C, .V }
 		_features += transmute(CPU_Features)exts
@@ -97,7 +97,7 @@ init_cpu_features :: proc() {
 				_features += { .Misaligned_Supported }
 			}
 		} else {
-			assert(pairs[1].key == .CPUPERF_0)
+			assert_contextless(pairs[1].key == .CPUPERF_0)
 			if .FAST in pairs[1].value.cpu_perf_0 {
 				_features += { .Misaligned_Supported, .Misaligned_Fast }
 			} else if .UNSUPPORTED not_in pairs[1].value.cpu_perf_0 {
@@ -108,6 +108,6 @@ init_cpu_features :: proc() {
 }
 
 @(init, private)
-init_cpu_name :: proc() {
+init_cpu_name :: proc "contextless" () {
 	cpu.name = "RISCV64"
 }
diff --git a/core/sys/unix/sysctl_freebsd.odin b/core/sys/unix/sysctl_freebsd.odin
index f5fee6c6c..cdd591a5b 100644
--- a/core/sys/unix/sysctl_freebsd.odin
+++ b/core/sys/unix/sysctl_freebsd.odin
@@ -3,7 +3,7 @@ package unix
 
 import "base:intrinsics"
 
-sysctl :: proc(mib: []i32, val: ^$T) -> (ok: bool) {
+sysctl :: proc "contextless" (mib: []i32, val: ^$T) -> (ok: bool) {
 	mib := mib
 	result_size := u64(size_of(T))