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EdouardSenceandClaude Opus 5.5
24d6bfe355
amdgpu userptr, which RADV uses for VK_EXT_external_memory_host, refuses file-backed VMAs (libdrm sets AMDGPU_GEM_USERPTR_ANONONLY). The executable's writable PT_LOAD mappings are file-backed MAP_PRIVATE, so on RADV they are never imported and become writable image mirrors that every address-based build compares in full. At load, libc replaces each rw-p mapping of /proc/self/exe with an anonymous copy at the same address, before any guest code runs. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
28 lines
907 B
C++
28 lines
907 B
C++
#include "prx/libc/include/GuestAllocations.hpp"
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#include <cstdlib>
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#include <filesystem>
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#include <fstream>
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#include <sstream>
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#include <string>
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static void Require(bool value) { if (!value) std::abort(); }
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int initialized = 0x5a5a5a5a;
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int main() {
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Require(GuestAllocations::GuestAllocationsGeneration_nid_postfix() != 0);
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Require(initialized == 0x5a5a5a5a);
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initialized = 1;
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Require(initialized == 1);
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const auto image = std::filesystem::read_symlink("/proc/self/exe").string();
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std::ifstream maps("/proc/self/maps");
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for (std::string line; std::getline(maps, line);) {
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std::istringstream fields(line);
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std::string span, permissions, offset, device, inode, path;
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fields >> span >> permissions >> offset >> device >> inode >> std::ws;
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std::getline(fields, path);
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Require(permissions != "rw-p" || path != image);
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}
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return 0;
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}
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