todo

include/zinnia/archctl.h

@@ -4,6 +4,7 @@
 #define ZINNIA_ARCHCTL_H
 
 #include <zinnia/status.h>
+#include <zinnia/syscall.h>
 
 #ifdef __cplusplus
 extern "C" {
@@ -19,7 +20,9 @@ typedef enum {
 } zn_archctl_t;
 
 // Performs an architecture-dependent operation identified by `op`.
-zn_status_t zn_archctl(zn_archctl_t op, void* value);
+static inline zn_status_t zn_archctl(zn_archctl_t op, void* value) {
+    return zn_syscall2(op, value, ZN_SYSCALL_ARCHCTL);
+}
 
 #ifdef __cplusplus
 }

include/zinnia/channel.h

@@ -5,6 +5,7 @@
 
 #include <zinnia/handle.h>
 #include <zinnia/status.h>
+#include <zinnia/syscall.h>
 #include <stddef.h>
 
 #ifdef __cplusplus
@@ -17,20 +18,28 @@ enum zn_channel_flags {
 };
 
 // Creates a new channel.
-zn_status_t zn_channel_create(enum zn_channel_flags flags, zn_handle_t* endpoint0, zn_handle_t* endpoint1);
+static inline zn_status_t zn_channel_create(
+    enum zn_channel_flags flags,
+    zn_handle_t* endpoint0,
+    zn_handle_t* endpoint1
+) {
+    return zn_syscall3(flags, endpoint0, endpoint1, ZN_SYSCALL_CHANNEL_CREATE);
+}
 
 // Notifies the peer that there is new data available.
 // The kernel only copies the first `num_handles` handles and `num_bytes` bytes.
-zn_status_t zn_channel_write(
+static inline zn_status_t zn_channel_write(
     zn_handle_t channel,
     const zn_handle_t* handles,
     const void* bytes,
     size_t num_handles,
     size_t num_bytes
-);
+) {
+    return zn_syscall5(channel, handles, bytes, num_handles, num_bytes, ZN_SYSCALL_CHANNEL_WRITE);
+}
 
 // Waits for a new message to appear in the channel.
-zn_status_t zn_channel_read(
+static inline zn_status_t zn_channel_read(
     zn_handle_t channel,
     zn_handle_t* handles,
     void* bytes,
@@ -38,7 +47,18 @@ zn_status_t zn_channel_read(
     size_t num_bytes,
     size_t* read_handles,
     size_t* read_bytes
+) {
+    return zn_syscall7(
+        channel,
+        handles,
+        bytes,
+        num_handles,
+        num_bytes,
+        read_handles,
+        read_bytes,
+        ZN_SYSCALL_CHANNEL_READ
     );
+}
 
 #ifdef __cplusplus
 }

include/zinnia/futex.h

@@ -4,6 +4,7 @@
 #define ZINNIA_FUTEX_H
 
 #include <zinnia/status.h>
+#include <zinnia/syscall.h>
 #include <stdint.h>
 
 #ifdef __cplusplus
@@ -12,10 +13,14 @@ extern "C" {
 
 // Blocks the calling thread if *addr == expected.
 // Returns immediately if the value at addr has changed.
-zn_status_t zn_futex_wait(int32_t* addr, int32_t expected);
+static inline zn_status_t zn_futex_wait(int32_t* addr, int32_t expected) {
+    return zn_syscall2(addr, expected, ZN_SYSCALL_FUTEX_WAIT);
+}
 
 // Wakes up to `count` threads waiting on the given futex address.
-zn_status_t zn_futex_wake(int32_t* addr, int32_t count);
+static inline zn_status_t zn_futex_wake(int32_t* addr, int32_t count) {
+    return zn_syscall2(addr, count, ZN_SYSCALL_FUTEX_WAKE);
+}
 
 #ifdef __cplusplus
 }

include/zinnia/handle.h

@@ -5,6 +5,7 @@
 
 #include <zinnia/rights.h>
 #include <zinnia/status.h>
+#include <zinnia/syscall.h>
 #include <stdint.h>
 
 #ifdef __cplusplus
@@ -21,16 +22,22 @@ typedef int32_t zn_handle_t;
 #define ZN_HANDLE_ZERO_VMO    ((zn_handle_t)(-4))
 
 // Checks an object handle for validity.
-zn_status_t zn_handle_validate(zn_handle_t handle);
+zn_status_t zn_handle_validate(zn_handle_t handle) {
+    return zn_syscall1(handle, ZN_SYSCALL_HANDLE_VALIDATE);
+}
 
 // Drops an object handle. All further references using this handle are invalid.
 // The numerical value may become valid again, but it is an error to keep using it.
 // The underlying object gets freed only once no other handle references it.
-zn_status_t zn_handle_drop(zn_handle_t handle);
+zn_status_t zn_handle_drop(zn_handle_t handle) {
+    return zn_syscall1(handle, ZN_SYSCALL_HANDLE_DROP);
+}
 
 // Creates a new handle pointing to the same object as pointed to
 // by the original handle. The new handle may obtain new rights.
-zn_status_t zn_handle_clone(zn_handle_t handle, zn_rights_t cloned_rights, zn_handle_t* cloned);
+zn_status_t zn_handle_clone(zn_handle_t handle, zn_rights_t cloned_rights, zn_handle_t* cloned) {
+    return zn_syscall3(handle, cloned_rights, cloned, ZN_SYSCALL_HANDLE_CLONE);
+}
 
 #ifdef __cplusplus
 }

include/zinnia/mem.h

@@ -32,23 +32,31 @@ enum zn_vm_flags {
 };
 
 // Creates a new virtual memory object.
-zn_status_t zn_vmo_create(size_t length, zn_handle_t* out);
+static inline zn_status_t zn_vmo_create(size_t length, zn_handle_t* out) {
+    return zn_syscall2(length, out, ZN_SYSCALL_VMO_CREATE);
+}
 
 // Creates a new virtual memory object which points to a contiguous phyiscal memory region.
-zn_status_t zn_vmo_create_phys(uintptr_t phys_addr, size_t length, zn_handle_t* out);
+static inline zn_status_t zn_vmo_create_phys(uintptr_t phys_addr, size_t length, zn_handle_t* out) {
+    return zn_syscall3(phys_addr, length, out, ZN_SYSCALL_VMO_CREATE_PHYS);
+}
 
 // Maps `bytes` of `vmo` at `vmo_offset` to `addr` in `vas`.
-zn_status_t zn_vmo_map(
+static inline zn_status_t zn_vmo_map(
     zn_handle_t vmo,
     zn_handle_t vas,
     uintptr_t vmo_offset,
     uintptr_t* addr,
     size_t bytes,
     enum zn_vm_flags flags
-);
+) {
+    return zn_syscall6(vmo, vas, vmo_offset, addr, bytes, flags, ZN_SYSCALL_VMO_MAP);
+}
 
 // Creates a new virtual address space.
-zn_status_t zn_vas_create(zn_handle_t* out);
+static inline zn_status_t zn_vas_create(zn_handle_t* out) {
+    return zn_syscall1(out, ZN_SYSCALL_VAS_CREATE);
+}
 
 #ifdef __cplusplus
 }

include/zinnia/namespace.h

@@ -11,11 +11,15 @@ extern "C" {
 #endif
 
 // Creates a new namespace.
-zn_status_t zn_ns_create(zn_handle_t* out);
+static inline zn_status_t zn_ns_create(zn_handle_t* out) {
+    return ZN_ERR_UNSUPPORTED;
+}
 
 // Moves a handle to another namespace.
 // The handle must have the `ZN_RIGHT_MOVE` right.
-zn_status_t zn_ns_move(zn_handle_t handle, zn_handle_t target_ns);
+static inline zn_status_t zn_ns_move(zn_handle_t handle, zn_handle_t target_ns) {
+    return ZN_ERR_UNSUPPORTED;
+}
 
 #ifdef __cplusplus
 }

include/zinnia/random.h

@@ -10,9 +10,7 @@
 extern "C" {
 #endif
 
-enum {
+#define ZN_RANDOM_MAX_ENTROPY 0x1000
-    ZN_RANDOM_MAX_ENTROPY = 0x1000
-};
 
 // Stores random bytes in a buffer.
 zn_status_t zn_random_get(void* addr, size_t len);

include/zinnia/resource.h

@@ -0,0 +1,16 @@
+// SPDX-License-Identifier: MIT
+
+#ifndef ZINNIA_RESOURCE_H
+#define ZINNIA_RESOURCE_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

include/zinnia/status.h

@@ -36,8 +36,6 @@ typedef enum {
     ZN_ERR_ALREADY_EXISTS = -11,
 } zn_status_t;
 
-const char* zn_status_to_string(zn_status_t err);
-
 #ifdef __cplusplus
 }
 #endif

include/zinnia/syscall.h

@@ -0,0 +1,236 @@
+// SPDX-License-Identifier: MIT
+
+#ifndef ZINNIA_SYSCALL_H
+#define ZINNIA_SYSCALL_H
+
+#include <zinnia/status.h>
+#include <zinnia/syscall_numbers.h>
+#include <stdint.h>
+
+typedef uintptr_t zn_arg_t;
+
+#ifdef __x86_64__
+#define ASM_REG_NUM "rax"
+#define ASM_REG_RET "rax"
+#define ASM_REG_A0  "rdi"
+#define ASM_REG_A1  "rsi"
+#define ASM_REG_A2  "rdx"
+#define ASM_REG_A3  "r9"
+#define ASM_REG_A4  "r8"
+#define ASM_REG_A5  "r10"
+#define ASM_REG_A6  "r12"
+#define ASM_REG_A7  "r13"
+#define ASM_SYSCALL "syscall"
+#define ASM_CLOBBER "rcx", "r11"
+#elif defined(__aarch64__)
+#define ASM_REG_NUM "x8"
+#define ASM_REG_RET "x0"
+#define ASM_REG_A0  "x0"
+#define ASM_REG_A1  "x1"
+#define ASM_REG_A2  "x2"
+#define ASM_REG_A3  "x3"
+#define ASM_REG_A4  "x4"
+#define ASM_REG_A5  "x5"
+#define ASM_REG_A6  "x6"
+#define ASM_REG_A7  "x7"
+#define ASM_SYSCALL "svc 0"
+#define ASM_CLOBBER
+#elif defined(__riscv) && (__riscv_xlen == 64)
+#define ASM_REG_NUM "t3"
+#define ASM_REG_RET "a0"
+#define ASM_REG_A0  "a0"
+#define ASM_REG_A1  "a1"
+#define ASM_REG_A2  "a2"
+#define ASM_REG_A3  "a3"
+#define ASM_REG_A4  "a4"
+#define ASM_REG_A5  "a5"
+#define ASM_REG_A5  "a6"
+#define ASM_REG_A5  "a7"
+#define ASM_SYSCALL "ecall"
+#define ASM_CLOBBER
+#elif defined(__loongarch64)
+#define ASM_REG_NUM "a7"
+#define ASM_REG_RET "a0"
+#define ASM_REG_A0  "a0"
+#define ASM_REG_A1  "a1"
+#define ASM_REG_A2  "a2"
+#define ASM_REG_A3  "a3"
+#define ASM_REG_A4  "a4"
+#define ASM_REG_A5  "a5"
+// TODO: Define ABI
+#define ASM_REG_A6  TODO
+#define ASM_REG_A7  TODO
+#define ASM_SYSCALL "syscall 0"
+#define ASM_CLOBBER
+#else
+#error "Unsupported architecture!"
+#endif
+
+static inline zn_status_t zn_syscall0(zn_syscall_t num) {
+    register zn_syscall_t rnum asm(ASM_REG_NUM) = num;
+    register zn_status_t value asm(ASM_REG_RET);
+    asm volatile(ASM_SYSCALL : "=r"(value) : "r"(rnum) : "memory", ASM_CLOBBER);
+    return value;
+}
+
+static inline zn_status_t zn_syscall1(zn_arg_t a0, zn_syscall_t num) {
+    register zn_syscall_t rnum asm(ASM_REG_NUM) = num;
+    register zn_status_t value asm(ASM_REG_RET);
+    register zn_arg_t r0 asm(ASM_REG_A0) = a0;
+    asm volatile(ASM_SYSCALL : "=r"(value) : "r"(rnum), "r"(r0) : "memory", ASM_CLOBBER);
+    return value;
+}
+#define zn_syscall1(a0, num) zn_syscall1((zn_arg_t)a0, num)
+
+static inline zn_status_t zn_syscall2(zn_arg_t a0, zn_arg_t a1, zn_syscall_t num) {
+    register zn_syscall_t rnum asm(ASM_REG_NUM) = num;
+    register zn_status_t value asm(ASM_REG_RET);
+    register zn_arg_t r0 asm(ASM_REG_A0) = a0;
+    register zn_arg_t r1 asm(ASM_REG_A1) = a1;
+    asm volatile(ASM_SYSCALL : "=r"(value) : "r"(rnum), "r"(r0), "r"(r1) : "memory", ASM_CLOBBER);
+    return value;
+}
+#define zn_syscall2(a0, a1, num) zn_syscall2((zn_arg_t)a0, (zn_arg_t)a1, num)
+
+static inline zn_status_t zn_syscall3(zn_arg_t a0, zn_arg_t a1, zn_arg_t a2, zn_syscall_t num) {
+    register zn_syscall_t rnum asm(ASM_REG_NUM) = num;
+    register zn_status_t value asm(ASM_REG_RET);
+    register zn_arg_t r0 asm(ASM_REG_A0) = a0;
+    register zn_arg_t r1 asm(ASM_REG_A1) = a1;
+    register zn_arg_t r2 asm(ASM_REG_A2) = a2;
+    asm volatile(ASM_SYSCALL : "=r"(value) : "r"(rnum), "r"(r0), "r"(r1), "r"(r2) : "memory", ASM_CLOBBER);
+    return value;
+}
+#define zn_syscall3(a0, a1, a2, num) zn_syscall3((zn_arg_t)a0, (zn_arg_t)a1, (zn_arg_t)a2, num)
+
+static inline zn_status_t zn_syscall4(zn_arg_t a0, zn_arg_t a1, zn_arg_t a2, zn_arg_t a3, zn_syscall_t num) {
+    register zn_syscall_t rnum asm(ASM_REG_NUM) = num;
+    register zn_status_t value asm(ASM_REG_RET);
+    register zn_arg_t r0 asm(ASM_REG_A0) = a0;
+    register zn_arg_t r1 asm(ASM_REG_A1) = a1;
+    register zn_arg_t r2 asm(ASM_REG_A2) = a2;
+    register zn_arg_t r3 asm(ASM_REG_A3) = a3;
+    asm volatile(ASM_SYSCALL : "=r"(value) : "r"(rnum), "r"(r0), "r"(r1), "r"(r2), "r"(r3) : "memory", ASM_CLOBBER);
+    return value;
+}
+#define zn_syscall4(a0, a1, a2, a3, num) zn_syscall4((zn_arg_t)a0, (zn_arg_t)a1, (zn_arg_t)a2, (zn_arg_t)a3, num)
+
+static inline zn_status_t zn_syscall5(
+    zn_arg_t a0,
+    zn_arg_t a1,
+    zn_arg_t a2,
+    zn_arg_t a3,
+    zn_arg_t a4,
+    zn_syscall_t num
+) {
+    register zn_syscall_t rnum asm(ASM_REG_NUM) = num;
+    register zn_status_t value asm(ASM_REG_RET);
+    register zn_arg_t r0 asm(ASM_REG_A0) = a0;
+    register zn_arg_t r1 asm(ASM_REG_A1) = a1;
+    register zn_arg_t r2 asm(ASM_REG_A2) = a2;
+    register zn_arg_t r3 asm(ASM_REG_A3) = a3;
+    register zn_arg_t r4 asm(ASM_REG_A4) = a4;
+    asm volatile(ASM_SYSCALL
+                 : "=r"(value)
+                 : "r"(rnum), "r"(r0), "r"(r1), "r"(r2), "r"(r3), "r"(r4)
+                 : "memory", ASM_CLOBBER);
+    return value;
+}
+#define zn_syscall5(a0, a1, a2, a3, a4, num) \
+    zn_syscall5((zn_arg_t)a0, (zn_arg_t)a1, (zn_arg_t)a2, (zn_arg_t)a3, (zn_arg_t)a4, num)
+
+static inline zn_status_t zn_syscall6(
+    zn_arg_t a0,
+    zn_arg_t a1,
+    zn_arg_t a2,
+    zn_arg_t a3,
+    zn_arg_t a4,
+    zn_arg_t a5,
+    zn_syscall_t num
+) {
+    register zn_syscall_t rnum asm(ASM_REG_NUM) = num;
+    register zn_status_t value asm(ASM_REG_RET);
+    register zn_arg_t r0 asm(ASM_REG_A0) = a0;
+    register zn_arg_t r1 asm(ASM_REG_A1) = a1;
+    register zn_arg_t r2 asm(ASM_REG_A2) = a2;
+    register zn_arg_t r3 asm(ASM_REG_A3) = a3;
+    register zn_arg_t r4 asm(ASM_REG_A4) = a4;
+    register zn_arg_t r5 asm(ASM_REG_A5) = a5;
+    asm volatile(ASM_SYSCALL
+                 : "=r"(value)
+                 : "r"(rnum), "r"(r0), "r"(r1), "r"(r2), "r"(r3), "r"(r4), "r"(r5)
+                 : "memory", ASM_CLOBBER);
+    return value;
+}
+#define zn_syscall6(a0, a1, a2, a3, a4, a5, num) \
+    zn_syscall6((zn_arg_t)a0, (zn_arg_t)a1, (zn_arg_t)a2, (zn_arg_t)a3, (zn_arg_t)a4, (zn_arg_t)a5, num)
+
+static inline zn_status_t zn_syscall7(
+    zn_arg_t a0,
+    zn_arg_t a1,
+    zn_arg_t a2,
+    zn_arg_t a3,
+    zn_arg_t a4,
+    zn_arg_t a5,
+    zn_arg_t a6,
+    zn_syscall_t num
+) {
+    register zn_syscall_t rnum asm(ASM_REG_NUM) = num;
+    register zn_status_t value asm(ASM_REG_RET);
+    register zn_arg_t r0 asm(ASM_REG_A0) = a0;
+    register zn_arg_t r1 asm(ASM_REG_A1) = a1;
+    register zn_arg_t r2 asm(ASM_REG_A2) = a2;
+    register zn_arg_t r3 asm(ASM_REG_A3) = a3;
+    register zn_arg_t r4 asm(ASM_REG_A4) = a4;
+    register zn_arg_t r5 asm(ASM_REG_A5) = a5;
+    register zn_arg_t r6 asm(ASM_REG_A6) = a6;
+    asm volatile(ASM_SYSCALL
+                 : "=r"(value)
+                 : "r"(rnum), "r"(r0), "r"(r1), "r"(r2), "r"(r3), "r"(r4), "r"(r5), "r"(r6)
+                 : "memory", ASM_CLOBBER);
+    return value;
+}
+#define zn_syscall7(a0, a1, a2, a3, a4, a5, a6, num) \
+    zn_syscall7((zn_arg_t)a0, (zn_arg_t)a1, (zn_arg_t)a2, (zn_arg_t)a3, (zn_arg_t)a4, (zn_arg_t)a5, (zn_arg_t)a6, num)
+
+static inline zn_status_t zn_syscall8(
+    zn_arg_t a0,
+    zn_arg_t a1,
+    zn_arg_t a2,
+    zn_arg_t a3,
+    zn_arg_t a4,
+    zn_arg_t a5,
+    zn_arg_t a6,
+    zn_arg_t a7,
+    zn_syscall_t num
+) {
+    register zn_syscall_t rnum asm(ASM_REG_NUM) = num;
+    register zn_status_t value asm(ASM_REG_RET);
+    register zn_arg_t r0 asm(ASM_REG_A0) = a0;
+    register zn_arg_t r1 asm(ASM_REG_A1) = a1;
+    register zn_arg_t r2 asm(ASM_REG_A2) = a2;
+    register zn_arg_t r3 asm(ASM_REG_A3) = a3;
+    register zn_arg_t r4 asm(ASM_REG_A4) = a4;
+    register zn_arg_t r5 asm(ASM_REG_A5) = a5;
+    register zn_arg_t r6 asm(ASM_REG_A6) = a6;
+    register zn_arg_t r7 asm(ASM_REG_A7) = a7;
+    asm volatile(ASM_SYSCALL
+                 : "=r"(value)
+                 : "r"(rnum), "r"(r0), "r"(r1), "r"(r2), "r"(r3), "r"(r4), "r"(r5), "r"(r6), "r"(r7)
+                 : "memory", ASM_CLOBBER);
+    return value;
+}
+#define zn_syscall8(a0, a1, a2, a3, a4, a5, a6, a7, num) \
+    zn_syscall8( \
+        (zn_arg_t)a0, \
+        (zn_arg_t)a1, \
+        (zn_arg_t)a2, \
+        (zn_arg_t)a3, \
+        (zn_arg_t)a4, \
+        (zn_arg_t)a5, \
+        (zn_arg_t)a6, \
+        (zn_arg_t)a7, \
+        num \
+    )
+
+#endif

include/zinnia/syscall_numbers.h

@@ -0,0 +1,38 @@
+// SPDX-License-Identifier: MIT
+
+#ifndef ZINNIA_SYSCALL_NUMBERS_H
+#define ZINNIA_SYSCALL_NUMBERS_H
+
+typedef enum {
+    ZN_SYSCALL_LOG,
+    ZN_SYSCALL_ARCHCTL,
+    ZN_SYSCALL_PAGE_SIZE,
+    ZN_SYSCALL_TIME,
+
+    ZN_SYSCALL_HANDLE_VALIDATE,
+    ZN_SYSCALL_HANDLE_DROP,
+    ZN_SYSCALL_HANDLE_CLONE,
+
+    ZN_SYSCALL_VAS_CREATE,
+
+    ZN_SYSCALL_VMO_CREATE,
+    ZN_SYSCALL_VMO_CREATE_PHYS,
+    ZN_SYSCALL_VMO_MAP,
+
+    ZN_SYSCALL_CHANNEL_CREATE,
+    ZN_SYSCALL_CHANNEL_WAIT,
+    ZN_SYSCALL_CHANNEL_READ,
+    ZN_SYSCALL_CHANNEL_WRITE,
+
+    ZN_SYSCALL_THREAD_CREATE,
+    ZN_SYSCALL_THREAD_START,
+    ZN_SYSCALL_THREAD_EXIT,
+
+    ZN_SYSCALL_RANDOM_GET,
+    ZN_SYSCALL_RANDOM_ENTROPY,
+
+    ZN_SYSCALL_FUTEX_WAIT,
+    ZN_SYSCALL_FUTEX_WAKE,
+} zn_syscall_t;
+
+#endif

include/zinnia/system.h

@@ -4,7 +4,6 @@
 #define ZINNIA_SYSTEM_H
 
 #include <zinnia/status.h>
-#include <stdint.h>
 #include <string.h>
 
 #ifdef __cplusplus
@@ -20,9 +19,6 @@ size_t zn_page_size();
 
 zn_status_t zn_powerctl();
 
-// Returns the current timestamp in nanoseconds.
-uint64_t zn_time();
-
 #ifdef __cplusplus
 }
 #endif

kernel/vdso/archctl.c

@@ -1,10 +0,0 @@
-// SPDX-License-Identifier: MIT
-
-#include <zinnia/archctl.h>
-#include <kernel/vdso.h>
-
-zn_status_t zn_archctl(zn_archctl_t op, void* value) {
-    return zn_syscall2(op, value, ZN_SYSCALL_ARCHCTL);
-}
-
-VDSO_SYMBOL(zn_archctl);

kernel/vdso/channel.c

@@ -1,45 +0,0 @@
-// SPDX-License-Identifier: MIT
-
-#include <zinnia/channel.h>
-#include <kernel/vdso.h>
-
-zn_status_t zn_channel_create(enum zn_channel_flags flags, zn_handle_t* endpoint0, zn_handle_t* endpoint1) {
-    return zn_syscall3(flags, endpoint0, endpoint1, ZN_SYSCALL_CHANNEL_CREATE);
-}
-
-VDSO_SYMBOL(zn_channel_create);
-
-zn_status_t zn_channel_write(
-    zn_handle_t channel,
-    const zn_handle_t* handles,
-    const void* bytes,
-    size_t num_handles,
-    size_t num_bytes
-) {
-    return zn_syscall5(channel, handles, bytes, num_handles, num_bytes, ZN_SYSCALL_CHANNEL_WRITE);
-}
-
-VDSO_SYMBOL(zn_channel_write);
-
-zn_status_t zn_channel_read(
-    zn_handle_t channel,
-    zn_handle_t* handles,
-    void* bytes,
-    size_t num_handles,
-    size_t num_bytes,
-    size_t* read_handles,
-    size_t* read_bytes
-) {
-    return zn_syscall7(
-        channel,
-        handles,
-        bytes,
-        num_handles,
-        num_bytes,
-        read_handles,
-        read_bytes,
-        ZN_SYSCALL_CHANNEL_READ
-    );
-}
-
-VDSO_SYMBOL(zn_channel_read);

kernel/vdso/futex.c

@@ -1,16 +0,0 @@
-// SPDX-License-Identifier: MIT
-
-#include <zinnia/futex.h>
-#include <kernel/vdso.h>
-
-zn_status_t zn_futex_wait(int32_t* addr, int32_t expected) {
-    return zn_syscall2(addr, expected, ZN_SYSCALL_FUTEX_WAIT);
-}
-
-VDSO_SYMBOL(zn_futex_wait);
-
-zn_status_t zn_futex_wake(int32_t* addr, int32_t count) {
-    return zn_syscall2(addr, count, ZN_SYSCALL_FUTEX_WAKE);
-}
-
-VDSO_SYMBOL(zn_futex_wake);

kernel/vdso/handle.c

@@ -1,22 +0,0 @@
-// SPDX-License-Identifier: MIT
-
-#include <zinnia/handle.h>
-#include <kernel/vdso.h>
-
-zn_status_t zn_handle_validate(zn_handle_t handle) {
-    return zn_syscall1(handle, ZN_SYSCALL_HANDLE_VALIDATE);
-}
-
-VDSO_SYMBOL(zn_handle_validate);
-
-zn_status_t zn_handle_drop(zn_handle_t handle) {
-    return zn_syscall1(handle, ZN_SYSCALL_HANDLE_DROP);
-}
-
-VDSO_SYMBOL(zn_handle_drop);
-
-zn_status_t zn_handle_clone(zn_handle_t handle, zn_rights_t cloned_rights, zn_handle_t* cloned) {
-    return zn_syscall3(handle, cloned_rights, cloned, ZN_SYSCALL_HANDLE_CLONE);
-}
-
-VDSO_SYMBOL(zn_handle_clone);

kernel/vdso/mem.c

@@ -1,35 +0,0 @@
-// SPDX-License-Identifier: MIT
-
-#include <zinnia/mem.h>
-#include <kernel/vdso.h>
-
-zn_status_t zn_vmo_create(size_t length, zn_handle_t* out) {
-    return zn_syscall2(length, out, ZN_SYSCALL_VMO_CREATE);
-}
-
-VDSO_SYMBOL(zn_vmo_create);
-
-zn_status_t zn_vmo_create_phys(uintptr_t phys_addr, size_t length, zn_handle_t* out) {
-    return zn_syscall3(phys_addr, length, out, ZN_SYSCALL_VMO_CREATE_PHYS);
-}
-
-VDSO_SYMBOL(zn_vmo_create_phys);
-
-zn_status_t zn_vmo_map(
-    zn_handle_t vmo,
-    zn_handle_t vas,
-    uintptr_t vmo_offset,
-    uintptr_t* addr,
-    size_t bytes,
-    enum zn_vm_flags flags
-) {
-    return zn_syscall6(vmo, vas, vmo_offset, addr, bytes, flags, ZN_SYSCALL_VMO_MAP);
-}
-
-VDSO_SYMBOL(zn_vmo_map);
-
-zn_status_t zn_vas_create(zn_handle_t* out) {
-    return zn_syscall1(out, ZN_SYSCALL_VAS_CREATE);
-}
-
-VDSO_SYMBOL(zn_vas_create);

kernel/vdso/namespace.c

@@ -1,16 +0,0 @@
-// SPDX-License-Identifier: MIT
-
-#include <zinnia/namespace.h>
-#include <kernel/vdso.h>
-
-zn_status_t zn_ns_create(zn_handle_t* out) {
-    return ZN_ERR_UNSUPPORTED;
-}
-
-VDSO_SYMBOL(zn_ns_create);
-
-zn_status_t zn_ns_move(zn_handle_t handle, zn_handle_t target_ns) {
-    return ZN_ERR_UNSUPPORTED;
-}
-
-VDSO_SYMBOL(zn_ns_move);

kernel/vdso/status.c

@@ -1,37 +0,0 @@
-// SPDX-License-Identifier: MIT
-
-#include <zinnia/status.h>
-#include <kernel/vdso.h>
-
-const char* zn_status_to_string(zn_status_t err) {
-    switch (err) {
-    case ZN_OK:
-        return "No error (OK)";
-    case ZN_ERR_INTERNAL:
-        return "An internal error occured (INTERNAL)";
-    case ZN_ERR_BAD_SYSCALL:
-        return "Syscall number is not a recognized syscall (BAD_SYSCALL)";
-    case ZN_ERR_UNSUPPORTED:
-        return "This operation is not supported or implemented yet (UNSUPPORTED)";
-    case ZN_ERR_NO_MEMORY:
-        return "System does not have enough free memory for this operation (NO_MEMORY)";
-    case ZN_ERR_NO_HANDLES:
-        return "Process can not own any more handles (NO_HANDLES)";
-    case ZN_ERR_INVALID:
-        return "One or more of the provided arguments is not valid (INVALID)";
-    case ZN_ERR_BAD_RANGE:
-        return "Argument is outside of the range for valid values (BAD_RANGE)";
-    case ZN_ERR_BAD_HANDLE:
-        return "Object handle does not name a valid object (BAD_HANDLE)";
-    case ZN_ERR_BAD_PERMS:
-        return "Object has insufficient permissions for this operation (BAD_PERMS)";
-    case ZN_ERR_BAD_BUFFER:
-        return "Buffer is not large enough or doesn't point to a valid memory region (BAD_BUFFER)";
-    case ZN_ERR_ALREADY_EXISTS:
-        return "The resource already exists (ALREADY_EXISTS)";
-    }
-
-    return "Unknown error code";
-}
-
-VDSO_SYMBOL(zn_status_to_string);

lib/freestanding/entry.c

@@ -1 +0,0 @@
-

lib/freestanding/meson.build

@@ -1,8 +0,0 @@
-libfreestanding = static_library(
-    'freestanding',
-    sources: [
-        'entry.c',
-        'vdso.c',
-    ],
-    include_directories: common_includes,
-)

lib/freestanding/vdso.c

@@ -1,138 +0,0 @@
-#include <zinnia/archctl.h>
-#include <zinnia/channel.h>
-#include <zinnia/futex.h>
-#include <zinnia/handle.h>
-#include <zinnia/mem.h>
-#include <zinnia/namespace.h>
-#include <zinnia/random.h>
-#include <zinnia/status.h>
-#include <zinnia/system.h>
-#include <zinnia/thread.h>
-#include <common/elf.h>
-#include <sys/auxv.h>
-
-static uint8_t vdso_symbol_bind(uint8_t info) {
-    return ELF64_ST_BIND(info);
-}
-
-static uint8_t vdso_symbol_type(uint8_t info) {
-    return ELF64_ST_TYPE(info);
-}
-
-struct vdso_info {
-    uintptr_t base;
-    const char* strings;
-    const struct elf64_sym* symbols;
-    size_t symbol_count;
-};
-
-static bool vdso_info_init(struct vdso_info* info) {
-    const uintptr_t base = getauxval(AT_SYSINFO_EHDR);
-    if (!base)
-        return false;
-
-    const struct elf64_ehdr* ehdr = (const void*)base;
-    if (ehdr->e_ident[EI_MAG0] != ELF_MAG[0] || ehdr->e_ident[EI_MAG1] != ELF_MAG[1] ||
-        ehdr->e_ident[EI_MAG2] != ELF_MAG[2] || ehdr->e_ident[EI_MAG3] != ELF_MAG[3] ||
-        ehdr->e_ident[EI_CLASS] != ELFCLASS64 || ehdr->e_ident[EI_DATA] != ELFDATA2LSB ||
-        ehdr->e_machine != ELF_ARCH_MACHINE)
-        return false;
-
-    const struct elf64_dyn* dynamic = nullptr;
-    for (size_t i = 0; i < ehdr->e_phnum; i++) {
-        const struct elf64_phdr* phdr = (const void*)(base + ehdr->e_phoff + (i * ehdr->e_phentsize));
-        if (phdr->p_type == PT_DYNAMIC) {
-            dynamic = (const void*)(base + phdr->p_vaddr);
-            break;
-        }
-    }
-    if (!dynamic)
-        return false;
-
-    const char* strings = nullptr;
-    const struct elf64_sym* symbols = nullptr;
-    const struct elf_hash* hash = nullptr;
-
-    for (const struct elf64_dyn* entry = dynamic; entry->d_tag != DT_NULL; entry++) {
-        switch (entry->d_tag) {
-        case DT_STRTAB:
-            strings = (const void*)(base + entry->d_un.d_ptr);
-            break;
-        case DT_SYMTAB:
-            symbols = (const void*)(base + entry->d_un.d_ptr);
-            break;
-        case DT_HASH:
-            hash = (const void*)(base + entry->d_un.d_ptr);
-            break;
-        default:
-            break;
-        }
-    }
-
-    if (!strings || !symbols || !hash)
-        return false;
-
-    *info = (struct vdso_info){
-        .base = base,
-        .strings = strings,
-        .symbols = symbols,
-        .symbol_count = hash->n_chain,
-    };
-    return true;
-}
-
-static void* vdso_lookup(const char* name) {
-    struct vdso_info info;
-    if (!vdso_info_init(&info))
-        return nullptr;
-
-    for (size_t i = 0; i < info.symbol_count; i++) {
-        const struct elf64_sym* symbol = &info.symbols[i];
-        if (vdso_symbol_bind(symbol->st_info) != STB_GLOBAL || vdso_symbol_type(symbol->st_info) != STT_FUNC)
-            continue;
-
-        const char* symbol_name = info.strings + symbol->st_name;
-        const char* lhs = symbol_name;
-        const char* rhs = name;
-        while (*lhs && *lhs == *rhs) {
-            lhs++;
-            rhs++;
-        }
-        if (*lhs == 0 && *rhs == 0)
-            return (void*)(info.base + symbol->st_value);
-    }
-
-    return nullptr;
-}
-
-#define VDSO_IFUNC(name) \
-    static typeof(name)* resolve_##name(void) { \
-        return (typeof(name)*)vdso_lookup("__vdso_" #name); \
-    } \
-    typeof(name) name __attribute__((ifunc("resolve_" #name)));
-
-VDSO_IFUNC(zn_archctl);
-VDSO_IFUNC(zn_channel_create);
-VDSO_IFUNC(zn_channel_write);
-VDSO_IFUNC(zn_channel_read);
-VDSO_IFUNC(zn_futex_wait);
-VDSO_IFUNC(zn_futex_wake);
-VDSO_IFUNC(zn_handle_validate);
-VDSO_IFUNC(zn_handle_drop);
-VDSO_IFUNC(zn_handle_clone);
-VDSO_IFUNC(zn_vmo_create);
-VDSO_IFUNC(zn_vmo_create_phys);
-VDSO_IFUNC(zn_vmo_map);
-VDSO_IFUNC(zn_vas_create);
-VDSO_IFUNC(zn_ns_create);
-VDSO_IFUNC(zn_ns_move);
-VDSO_IFUNC(zn_random_get);
-VDSO_IFUNC(zn_random_entropy);
-VDSO_IFUNC(zn_status_to_string);
-VDSO_IFUNC(zn_log);
-VDSO_IFUNC(zn_page_size);
-VDSO_IFUNC(zn_powerctl);
-VDSO_IFUNC(zn_time);
-VDSO_IFUNC(zn_thread_create);
-VDSO_IFUNC(zn_thread_start);
-VDSO_IFUNC(zn_thread_exit);

lib/meson.build

@@ -1,3 +1 @@
-subdir('freestanding')
-
 subdir('device')