From 5c5cf2f8e000d1bf4fc12ff20351aa60367cb563 Mon Sep 17 00:00:00 2001 From: Yuri Kunde Schlesner Date: Thu, 9 Jul 2015 22:52:15 -0300 Subject: Core: Properly configure address space when loading a binary The code now properly configures the process image to match the loaded binary segments (code, rodata, data) instead of just blindly allocating a large chunk of dummy memory. --- src/core/loader/ncch.cpp | 32 ++++++++++++++++++++++++++++---- 1 file changed, 28 insertions(+), 4 deletions(-) (limited to 'src/core/loader/ncch.cpp') diff --git a/src/core/loader/ncch.cpp b/src/core/loader/ncch.cpp index 2b26b31c..87603d19 100644 --- a/src/core/loader/ncch.cpp +++ b/src/core/loader/ncch.cpp @@ -118,6 +118,9 @@ FileType AppLoader_NCCH::IdentifyType(FileUtil::IOFile& file) { } ResultStatus AppLoader_NCCH::LoadExec() const { + using Kernel::SharedPtr; + using Kernel::CodeSet; + if (!is_loaded) return ResultStatus::ErrorNotLoaded; @@ -126,7 +129,30 @@ ResultStatus AppLoader_NCCH::LoadExec() const { std::string process_name = Common::StringFromFixedZeroTerminatedBuffer( (const char*)exheader_header.codeset_info.name, 8); u64 program_id = *reinterpret_cast(&ncch_header.program_id[0]); - Kernel::g_current_process = Kernel::Process::Create(process_name, program_id); + + SharedPtr codeset = CodeSet::Create(process_name, program_id); + + codeset->code.offset = 0; + codeset->code.addr = exheader_header.codeset_info.text.address; + codeset->code.size = exheader_header.codeset_info.text.num_max_pages * Memory::PAGE_SIZE; + + codeset->rodata.offset = codeset->code.offset + codeset->code.size; + codeset->rodata.addr = exheader_header.codeset_info.ro.address; + codeset->rodata.size = exheader_header.codeset_info.ro.num_max_pages * Memory::PAGE_SIZE; + + // TODO(yuriks): Not sure if the bss size is added to the page-aligned .data size or just + // to the regular size. Playing it safe for now. + u32 bss_page_size = (exheader_header.codeset_info.bss_size + 0xFFF) & ~0xFFF; + code.resize(code.size() + bss_page_size, 0); + + codeset->data.offset = codeset->rodata.offset + codeset->rodata.size; + codeset->data.addr = exheader_header.codeset_info.data.address; + codeset->data.size = exheader_header.codeset_info.data.num_max_pages * Memory::PAGE_SIZE + bss_page_size; + + codeset->entrypoint = codeset->code.addr; + codeset->memory = std::make_shared>(std::move(code)); + + Kernel::g_current_process = Kernel::Process::Create(std::move(codeset)); // Attach a resource limit to the process based on the resource limit category Kernel::g_current_process->resource_limit = Kernel::ResourceLimit::GetForCategory( @@ -137,11 +163,9 @@ ResultStatus AppLoader_NCCH::LoadExec() const { std::copy_n(exheader_header.arm11_kernel_caps.descriptors, kernel_caps.size(), begin(kernel_caps)); Kernel::g_current_process->ParseKernelCaps(kernel_caps.data(), kernel_caps.size()); - Memory::WriteBlock(entry_point, &code[0], code.size()); - s32 priority = exheader_header.arm11_system_local_caps.priority; u32 stack_size = exheader_header.codeset_info.stack_size; - Kernel::g_current_process->Run(entry_point, priority, stack_size); + Kernel::g_current_process->Run(priority, stack_size); return ResultStatus::Success; } return ResultStatus::Error; -- cgit v1.2.3