From aa096fe6886681d3338573cd3af779b57a5b56ab Mon Sep 17 00:00:00 2001
From: salmonik <salmonik@tuta.io>
Date: Sun, 30 Aug 2026 03:32:59 +0200
Subject: init

---
 src/modules.cpp | 69 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100644 src/modules.cpp

(limited to 'src/modules.cpp')

diff --git a/src/modules.cpp b/src/modules.cpp
new file mode 100644
index 0000000..d20fe04
--- /dev/null
+++ b/src/modules.cpp
@@ -0,0 +1,69 @@
+// modules.cpp — /proc/self/maps parsing and module discovery
+#include "hl2h.h"
+
+static bool basename_is(const char *path, const char *base) {
+  size_t pl = strlen(path), bl = strlen(base);
+  if (pl < bl || strcmp(path + pl - bl, base) != 0)
+    return false;
+  return pl == bl || path[pl - bl - 1] == '/';
+}
+
+void find_modules() {
+  g_client = Module();
+  g_engine = Module();
+  FILE *f = fopen("/proc/self/maps", "r");
+  if (!f)
+    return;
+  char line[1024];
+  while (fgets(line, sizeof(line), f)) {
+    unsigned long lo, hi;
+    char perms[8];
+    int consumed = 0;
+    if (sscanf(line, "%lx-%lx %7s %*x %*x:%*x %*u%n", &lo, &hi, perms,
+               &consumed) < 3)
+      continue;
+    if (perms[0] == '-' && perms[1] == '-' && perms[2] == '-')
+      continue; // PROT_NONE
+
+    const char *path = line + consumed;
+    while (*path == ' ' || *path == '\t')
+      path++;
+    size_t pl = strlen(path);
+    while (pl && (path[pl - 1] == '\n' || path[pl - 1] == '\r'))
+      pl--;
+
+    Module *m = nullptr;
+    char clean[1024];
+    if (pl && pl < sizeof(clean)) {
+      memcpy(clean, path, pl);
+      clean[pl] = 0;
+      if (basename_is(clean, "client.so"))
+        m = &g_client;
+      else if (basename_is(clean, "engine.so"))
+        m = &g_engine;
+    } else {
+      // anon: absorb only as .bss tail after a file-backed range
+      if (g_client.valid() && g_client.ranges.back().file &&
+          lo == g_client.ranges.back().hi && hi - lo <= 0x1000000)
+        m = &g_client;
+      else if (g_engine.valid() && g_engine.ranges.back().file &&
+               lo == g_engine.ranges.back().hi && hi - lo <= 0x1000000)
+        m = &g_engine;
+    }
+    if (!m)
+      continue;
+    if (m->ranges.empty()) {
+      if (!pl)
+        continue;
+      m->path = clean;
+    }
+    bool file = pl != 0;
+    if (!m->ranges.empty() && lo == m->ranges.back().hi) {
+      m->ranges.back().hi = hi;
+      m->ranges.back().file = m->ranges.back().file && file;
+    } else {
+      m->ranges.push_back({lo, hi, file});
+    }
+  }
+  fclose(f);
+}
-- 
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