From fa9f58446f85d478689c6048eac0c65ef87635be Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marcin=20Miko=C5=82ajczyk?= <marcinmikolajcz@gmail.com>
Date: Wed, 30 Apr 2025 11:09:40 +0200
Subject: [PATCH] Implement sceKernelPwritev (#2865)

---
 src/core/devices/base_device.h            |  4 ++++
 src/core/libraries/kernel/file_system.cpp | 27 ++++++++++++++++++++---
 2 files changed, 28 insertions(+), 3 deletions(-)

diff --git a/src/core/devices/base_device.h b/src/core/devices/base_device.h
index 36614b8f4..0cbbd3a00 100644
--- a/src/core/devices/base_device.h
+++ b/src/core/devices/base_device.h
@@ -40,6 +40,10 @@ public:
         return ORBIS_KERNEL_ERROR_EBADF;
     }
 
+    virtual size_t pwritev(const Libraries::Kernel::SceKernelIovec* iov, int iovcnt, u64 offset) {
+        return ORBIS_KERNEL_ERROR_EBADF;
+    }
+
     virtual s64 lseek(s64 offset, int whence) {
         return ORBIS_KERNEL_ERROR_EBADF;
     }
diff --git a/src/core/libraries/kernel/file_system.cpp b/src/core/libraries/kernel/file_system.cpp
index bc34dff98..bcfa15a62 100644
--- a/src/core/libraries/kernel/file_system.cpp
+++ b/src/core/libraries/kernel/file_system.cpp
@@ -877,7 +877,7 @@ s32 PS4_SYSV_ABI sceKernelGetdirentries(s32 fd, char* buf, s32 nbytes, s64* base
     return result;
 }
 
-s64 PS4_SYSV_ABI posix_pwrite(s32 fd, void* buf, size_t nbytes, s64 offset) {
+s64 PS4_SYSV_ABI posix_pwritev(s32 fd, const SceKernelIovec* iov, s32 iovcnt, s64 offset) {
     if (offset < 0) {
         *__Error() = POSIX_EINVAL;
         return -1;
@@ -893,7 +893,7 @@ s64 PS4_SYSV_ABI posix_pwrite(s32 fd, void* buf, size_t nbytes, s64 offset) {
     std::scoped_lock lk{file->m_mutex};
 
     if (file->type == Core::FileSys::FileType::Device) {
-        s64 result = file->device->pwrite(buf, nbytes, offset);
+        s64 result = file->device->pwritev(iov, iovcnt, offset);
         if (result < 0) {
             ErrSceToPosix(result);
             return -1;
@@ -908,7 +908,16 @@ s64 PS4_SYSV_ABI posix_pwrite(s32 fd, void* buf, size_t nbytes, s64 offset) {
         *__Error() = POSIX_EIO;
         return -1;
     }
-    return file->f.WriteRaw<u8>(buf, nbytes);
+    size_t total_written = 0;
+    for (int i = 0; i < iovcnt; i++) {
+        total_written += file->f.WriteRaw<u8>(iov[i].iov_base, iov[i].iov_len);
+    }
+    return total_written;
+}
+
+s64 PS4_SYSV_ABI posix_pwrite(s32 fd, void* buf, size_t nbytes, s64 offset) {
+    SceKernelIovec iovec{buf, nbytes};
+    return posix_pwritev(fd, &iovec, 1, offset);
 }
 
 s64 PS4_SYSV_ABI sceKernelPwrite(s32 fd, void* buf, size_t nbytes, s64 offset) {
@@ -920,6 +929,15 @@ s64 PS4_SYSV_ABI sceKernelPwrite(s32 fd, void* buf, size_t nbytes, s64 offset) {
     return result;
 }
 
+s64 PS4_SYSV_ABI sceKernelPwritev(s32 fd, const SceKernelIovec* iov, s32 iovcnt, s64 offset) {
+    s64 result = posix_pwritev(fd, iov, iovcnt, offset);
+    if (result < 0) {
+        LOG_ERROR(Kernel_Fs, "error = {}", *__Error());
+        return ErrnoToSceKernelError(*__Error());
+    }
+    return result;
+}
+
 s32 PS4_SYSV_ABI posix_unlink(const char* path) {
     if (path == nullptr) {
         *__Error() = POSIX_EINVAL;
@@ -1017,7 +1035,10 @@ void RegisterFileSystem(Core::Loader::SymbolsResolver* sym) {
     LIB_FUNCTION("sfKygSjIbI8", "libkernel", 1, "libkernel", 1, 1, getdirentries);
     LIB_FUNCTION("taRWhTJFTgE", "libkernel", 1, "libkernel", 1, 1, sceKernelGetdirentries);
     LIB_FUNCTION("C2kJ-byS5rM", "libkernel", 1, "libkernel", 1, 1, posix_pwrite);
+    LIB_FUNCTION("FCcmRZhWtOk", "libScePosix", 1, "libkernel", 1, 1, posix_pwritev);
+    LIB_FUNCTION("FCcmRZhWtOk", "libkernel", 1, "libkernel", 1, 1, posix_pwritev);
     LIB_FUNCTION("nKWi-N2HBV4", "libkernel", 1, "libkernel", 1, 1, sceKernelPwrite);
+    LIB_FUNCTION("mBd4AfLP+u8", "libkernel", 1, "libkernel", 1, 1, sceKernelPwritev);
     LIB_FUNCTION("AUXVxWeJU-A", "libkernel", 1, "libkernel", 1, 1, sceKernelUnlink);
 }