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https://github.com/FEX-Emu/FEX.git
synced 2026-10-11 15:00:41 +02:00
Ryan Houdek
cc8fa9d934
This was altered in kernel 2.3.23 to include a mem_unit variable. mem_unit states what each of the memory units is scaled by. The kernel will always have this be 1 or page size on x86, so follow that behaviour. Instead of maxing out the values to what uint32_t can handle, scale all of these by page size instead. This fixes a crash in KOTOR2's boot sequence where it would divide by zero if everything was maxed out.
92 lines
2.8 KiB
C++
92 lines
2.8 KiB
C++
/*
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$info$
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tags: LinuxSyscalls|syscalls-x86-32
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$end_info$
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*/
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#include "Tests/LinuxSyscalls/Syscalls.h"
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#include "Tests/LinuxSyscalls/x32/Syscalls.h"
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#include <sys/resource.h>
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#include <sys/utsname.h>
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#include <sys/sysinfo.h>
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namespace FEX::HLE::x32 {
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struct rlimit32 {
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uint32_t rlim_cur;
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uint32_t rlim_max;
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};
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struct sysinfo32 {
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int32_t uptime;
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uint32_t loads[3];
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uint32_t totalram;
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uint32_t freeram;
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uint32_t sharedram;
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uint32_t bufferram;
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uint32_t totalswap;
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uint32_t freeswap;
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uint16_t procs;
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uint32_t totalhigh;
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uint32_t freehigh;
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uint32_t mem_unit;
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char _pad[8];
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};
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static_assert(sizeof(sysinfo32) == 64, "Needs to be 64bytes");
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void RegisterInfo() {
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REGISTER_SYSCALL_IMPL_X32(ugetrlimit, [](FEXCore::Core::CpuStateFrame *Frame, int resource, rlimit32 *rlim) -> uint64_t {
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struct rlimit rlim64{};
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uint64_t Result = ::getrlimit(resource, &rlim64);
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rlim->rlim_cur = rlim64.rlim_cur;
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rlim->rlim_max = rlim64.rlim_max;
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SYSCALL_ERRNO();
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});
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REGISTER_SYSCALL_IMPL_X32(sysinfo, [](FEXCore::Core::CpuStateFrame *Frame, struct sysinfo32 *info) -> uint64_t {
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struct sysinfo Host{};
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uint64_t Result = ::sysinfo(&Host);
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if (Result != -1) {
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#define Copy(x) info->x = static_cast<decltype(info->x)>(std::min(Host.x, static_cast<decltype(Host.x)>(std::numeric_limits<decltype(info->x)>::max())));
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Copy(uptime);
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Copy(procs);
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#define CopyShift(x) info->x = static_cast<decltype(info->x)>(Host.x >> ShiftAmount);
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info->loads[0] = std::min(Host.loads[0], static_cast<unsigned long>(std::numeric_limits<uint32_t>::max()));
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info->loads[1] = std::min(Host.loads[1], static_cast<unsigned long>(std::numeric_limits<uint32_t>::max()));
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info->loads[2] = std::min(Host.loads[2], static_cast<unsigned long>(std::numeric_limits<uint32_t>::max()));
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// If any result can't fit in to a uint32_t then we need to shift the mem_unit and all the members
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// Set the mem_unit to the pagesize
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uint32_t ShiftAmount{};
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if ((Host.totalram >> 32) != 0 ||
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(Host.totalswap >> 32) != 0) {
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while (Host.mem_unit < 4096) {
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Host.mem_unit <<= 1;
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++ShiftAmount;
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}
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}
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CopyShift(totalram);
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CopyShift(sharedram);
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CopyShift(bufferram);
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CopyShift(totalswap);
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CopyShift(freeswap);
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CopyShift(totalhigh);
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CopyShift(freehigh);
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Copy(mem_unit);
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}
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SYSCALL_ERRNO();
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});
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REGISTER_SYSCALL_IMPL_X32(getrusage, [](FEXCore::Core::CpuStateFrame *Frame, int who, rusage_32 *usage) -> uint64_t {
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struct rusage usage64 = *usage;
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uint64_t Result = ::getrusage(who, &usage64);
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*usage = usage64;
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SYSCALL_ERRNO();
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});
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}
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}
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