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sys_fs: Fixup op_read

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This commit is contained in:
Elad 2026-02-28 09:14:34 +02:00
parent 45c6e938a5
commit 0f3275ec82
1 changed files with 12 additions and 2 deletions
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14
rpcs3/Emu/Cell/lv2/sys_fs.cpp
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@ -382,10 +382,12 @@ lv2_fs_object::lv2_fs_object(utils::serial& ar, bool)
u64 lv2_file::op_read(const fs::file& file, vm::ptr<void> buf, u64 size, u64 opt_pos)
{
if (u64 region = buf.addr() >> 28, region_end = (buf.addr() + size) >> 28; region == region_end && region == 0)
if (u64 region = buf.addr() >> 28, region_end = (buf.addr() + size) >> 28;
size < u32{umax} && region == region_end && (region == 0 || region == 0xD) && vm::check_addr(buf.addr(), vm::page_writable, static_cast<u32>(size)))
{
// Optimize reads from safe memory
return (opt_pos == umax ? file.read(buf.get_ptr(), size) : file.read_at(opt_pos, buf.get_ptr(), size));
const auto buf_ptr = vm::get_super_ptr(buf.addr());
return (opt_pos == umax ? file.read(buf_ptr, size) : file.read_at(opt_pos, buf_ptr, size));
}
// Copy data from intermediate buffer (avoid passing vm pointer to a native API)
@ -412,6 +414,14 @@ u64 lv2_file::op_read(const fs::file& file, vm::ptr<void> buf, u64 size, u64 opt
u64 lv2_file::op_write(const fs::file& file, vm::cptr<void> buf, u64 size)
{
if (u64 region = buf.addr() >> 28, region_end = (buf.addr() + size) >> 28;
size < u32{umax} && region == region_end && (region == 0 || region == 0xD) && vm::check_addr(buf.addr(), vm::page_readable, static_cast<u32>(size)))
{
// Optimize writes from safe memory
const auto buf_ptr = vm::get_super_ptr(buf.addr());
return file.write(buf_ptr, size);
}
// Copy data to intermediate buffer (avoid passing vm pointer to a native API)
std::vector<uchar> local_buf(std::min<u64>(size, 65536));