fix(relinker): map zero-flag ps5 load segments as rwx

README.md

@@ -4,7 +4,7 @@ Converter for native execution of PlayStation 5 ELF binaries on Linux through bi
 
 ## Status
 
-Execution reaches `_start`, stack unwinding and exception handling tables are built. All unimplemented stub functions throw std::runtime_error. `what()` is printed to stderr and the process terminates. Now: `memset_nid_postfix not implemented`
+Execution reaches `_start`, stack unwinding and exception handling tables are built. All unimplemented stub functions throw std::runtime_error. `what()` is printed to stderr and the process terminates. Now: `sceSysmoduleLoadModule not implemented`
 
 ## Disclaimer
 

core/elfpatcher/src/general/ProgramHeaderLayoutBuilder.cpp

@@ -92,6 +92,7 @@ Domain::ProgramHeader ProgramHeaderLayoutBuilder::_makeInterpHeader(std::uint64_
 }
 
 std::uint32_t ProgramHeaderLayoutBuilder::_fixLoadFlags(std::uint32_t originalFlags) const {
+    if (originalFlags == 0) return PF_R | PF_W | PF_X;
     return originalFlags | PF_R;
 }
 

core/libs/prx/libc/src/Strings.cpp

@@ -8,7 +8,6 @@
 extern "C" {
 
 void* memset_nid_postfix(void* s, int c, size_t n) {
-    NotImplemented_nid_no_patch(__func__);
     fprintf(stderr, "memset_nid_postfix: s=%p c=%d n=%zu\n", s, c, n);
     return std::memset(s, c, n);
 }

core/libs/prx/libkernel/DirectMemory/DirectMemory.cpp

@@ -8,6 +8,7 @@ static int LinuxProtFromSce(int prot) {
     if (prot & 1) result |= PROT_READ;
     if (prot & 2) result |= PROT_WRITE;
     if (prot & 4) result |= PROT_EXEC;
+    if (prot & ~7) result |= PROT_EXEC;
     return result;
 }
 
@@ -25,6 +26,18 @@ int DoMapDirect(void** addr, size_t len, int prot, int flags, int64_t physStart,
     void* result = mmap(hint, len, LinuxProtFromSce(prot), mmapFlags, -1, 0);
     if (result == MAP_FAILED) return SCE_KERNEL_ERROR_ENOMEM;
     fprintf(stderr, "DoMapDirect: mmap result=%p linuxProt=%d\n", result, LinuxProtFromSce(prot));
+    FILE* f = fopen("/proc/self/maps", "r");
+    if (f) {
+        char line[256];
+        while (fgets(line, sizeof(line), f)) {
+            uintptr_t start, end;
+            if (sscanf(line, "%lx-%lx", &start, &end) == 2) {
+                uintptr_t r = reinterpret_cast<uintptr_t>(result);
+                if (r >= start && r < end) { fprintf(stderr, "maps: %s", line); break; }
+            }
+        }
+        fclose(f);
+    }
     *addr = result;
     return 0;
 }