WIP process attaching

src/gnu/gnu_parse.c

@@ -0,0 +1,63 @@
+// Copyright (c) Epic Games Tools
+// Licensed under the MIT license (https://opensource.org/license/mit/)
+
+internal GNU_RDebugInfoList
+gnu_parse_rdebug(Arena *arena, B32 is_64bit, U64 first_rdebug_vaddr, GNU_MemRead *mem_read_func, void *mem_read_ud)
+{
+  GNU_RDebugInfoList result = {0};
+
+  for (U64 rdebug_vaddr = first_rdebug_vaddr, rdebug_next = 0; rdebug_vaddr != 0; rdebug_vaddr = rdebug_next) {
+    GNU_RDebugInfo64 rdebug;
+    if (is_64bit) {
+      U64 rdebug_read_size = mem_read_func(rdebug_vaddr, sizeof(rdebug), &rdebug, mem_read_ud);
+      if (rdebug_read_size != sizeof(rdebug)) { goto exit; }
+    } else {
+      GNU_RDebugInfo32 rdebug32;
+      U64 rdebug_read_size = mem_read_func(rdebug_vaddr, sizeof(rdebug32), &rdebug32, mem_read_ud);
+      if (rdebug_read_size != sizeof(rdebug32)) { goto exit; }
+    }
+    if (rdebug.r_version < 1) { goto exit; }
+
+    if (rdebug.r_version > 1) {
+      U64 r_next_size = mem_read_func(rdebug_vaddr + sizeof(rdebug), sizeof(rdebug_next), &rdebug_next, mem_read_ud);
+      if (r_next_size != sizeof(rdebug_next)) { goto exit; }
+    }
+
+    GNU_RDebugInfoNode *rdebug_n = push_array(arena, GNU_RDebugInfoNode, 1);
+    rdebug_n->v = rdebug;
+    SLLQueuePush(result.first, result.last, rdebug_n);
+    result.count += 1;
+  }
+
+  exit:;
+  return result;
+}
+
+internal GNU_LinkMapList
+gnu_parse_link_map_list(Arena *arena, B32 is_64bit, U64 first_link_map_vaddr, GNU_MemRead *mem_read_func, void *mem_read_ud)
+{
+  GNU_LinkMapList result = {0};
+
+  GNU_LinkMap64 link_map = {0};
+  for (U64 link_map_vaddr = first_link_map_vaddr; link_map_vaddr != 0; link_map_vaddr = link_map.next_vaddr) {
+    if (is_64bit) {
+      U64 link_map_size = mem_read_func(link_map_vaddr, sizeof(link_map), &link_map, mem_read_ud);
+      if (link_map_size != sizeof(link_map)) { goto exit; }
+    } else {
+      GNU_LinkMap32 link_map32 = {0};
+      U64 link_map_size = mem_read_func(link_map_vaddr, sizeof(link_map32), &link_map32, mem_read_ud);
+      if (link_map_size != sizeof(link_map32)) { goto exit; }
+      gnu_linkmap64_from_linkmap32(link_map32);
+    }
+
+    GNU_LinkMapNode *n = push_array(arena, GNU_LinkMapNode, 1);
+    n->v = link_map;
+    SLLQueuePush(result.first, result.last, n);
+    result.count += 1;
+  }
+
+  exit:;
+  return result;
+}
+
+

src/gnu/gnu_parse.h

@@ -0,0 +1,41 @@
+// Copyright (c) Epic Games Tools
+// Licensed under the MIT license (https://opensource.org/license/mit/)
+
+#ifndef GNU_PARSE_H
+#define GNU_PARSE_H
+
+typedef struct GNU_LinkMapNode
+{
+  GNU_LinkMap64 v;
+  struct GNU_LinkMapNode *next;
+} GNU_LinkMapNode;
+
+typedef struct GNU_LinkMapList
+{
+  U64 count;
+  GNU_LinkMapNode *first;
+  GNU_LinkMapNode *last;
+} GNU_LinkMapList;
+
+typedef struct GNU_RDebugInfoNode
+{
+  GNU_RDebugInfo64 v;
+  struct GNU_RDebugInfoNode *next;
+} GNU_RDebugInfoNode;
+
+typedef struct GNU_RDebugInfoList
+{
+  U64 count;
+  GNU_RDebugInfoNode *first;
+  GNU_RDebugInfoNode *last;
+} GNU_RDebugInfoList;
+
+#define GNU_MEM_READ(name) U64 name(U64 addr, U64 size, void *buffer, void *ud)
+typedef GNU_MEM_READ(GNU_MemRead);
+
+////////////////////////////////
+internal GNU_RDebugInfoList gnu_parse_rdebug(Arena *arena, B32 is_64bit, U64 first_rdebug_vaddr, GNU_MemRead *mem_read_func, void *mem_read_ud);
+internal GNU_LinkMapList    gnu_parse_link_map_list(Arena *arena, B32 is_64bit, U64 first_link_map_vaddr, GNU_MemRead *mem_read_func, void *mem_read_ud);
+
+#endif
+