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https://github.com/boykopovar/AnyPS5.git
synced 2026-10-22 00:22:57 -05:00
milescovielloandClaude Opus 5.5
d7c83db2a5
sysarch's AMD64_GET_FSBASE, AMD64_GET_GSBASE and AMD64_SET_GSBASE now follow FreeBSD 11's amd64 sysarch on Linux x86-64 through arch_prctl: the GS base is the calling thread's, a base at or above VM_MAXUSER_ADDRESS returns EINVAL and a null argument EFAULT. AMD64_SET_FSBASE, whose base guest and host code share for their TLS, other operations and other hosts still throw. Wine sets its TEB this way. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
56 lines
1.9 KiB
C++
56 lines
1.9 KiB
C++
#include "prx/libc/include/general/VabiMacros.hpp"
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#include <cstdint>
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#include <cstdlib>
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#include <stdexcept>
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#include <string>
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extern "C" {
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int APS5_VABI sysarch(int number, void* args);
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int* APS5_VABI __error_nid_postfix();
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}
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static void Require(bool value) { if (!value) std::abort(); }
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template <typename TCall> static std::string Thrown(TCall call) {
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try {
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call();
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} catch (const std::runtime_error& error) {
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return error.what();
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}
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return {};
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}
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int main() {
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Require(Thrown([] { sysarch(129, nullptr); }) == "sysarch: operation 129 not implemented");
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Require(Thrown([] { sysarch(7, nullptr); }) == "sysarch: operation 7 not implemented");
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#if defined(__linux__) && defined(__x86_64__)
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static std::uint64_t slots[2] = {0x1234567890abcdefull, 0};
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std::uint64_t base = reinterpret_cast<std::uintptr_t>(slots);
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Require(sysarch(131, &base) == 0);
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std::uint64_t read = 0;
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Require(sysarch(130, &read) == 0 && read == base);
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std::uint64_t through = 0;
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asm volatile("movq %%gs:0, %0" : "=r"(through));
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Require(through == slots[0]);
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std::uint64_t fs = 0;
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Require(sysarch(128, &fs) == 0 && fs != 0);
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std::uint64_t self = 0;
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asm volatile("movq %%fs:0, %0" : "=r"(self));
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Require(self == fs);
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std::uint64_t outside = 0x0000800000000000ull;
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*__error_nid_postfix() = 0;
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Require(sysarch(131, &outside) == -1 && *__error_nid_postfix() == 22);
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Require(sysarch(130, &read) == 0 && read == base);
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*__error_nid_postfix() = 0;
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Require(sysarch(131, nullptr) == -1 && *__error_nid_postfix() == 14);
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Require(sysarch(130, nullptr) == -1 && *__error_nid_postfix() == 14);
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std::uint64_t zero = 0;
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Require(sysarch(131, &zero) == 0 && sysarch(130, &read) == 0 && read == 0);
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#else
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std::uint64_t base = 0;
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Require(Thrown([&base] { sysarch(130, &base); }) == "sysarch: segment bases on this host not implemented");
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#endif
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return 0;
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}
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