From bca6a155c79147f706242ed7c590a3538e407a40 Mon Sep 17 00:00:00 2001
From: Eric Andersen <andersen@codepoet.org>
Date: Tue, 19 Aug 2003 06:05:34 +0000
Subject: Phase one of my evil plan to clean up ld.so...

---
 ldso/include/dl-hash.h | 118 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 118 insertions(+)
 create mode 100644 ldso/include/dl-hash.h

(limited to 'ldso/include/dl-hash.h')

diff --git a/ldso/include/dl-hash.h b/ldso/include/dl-hash.h
new file mode 100644
index 000000000..d7ed5ab2c
--- /dev/null
+++ b/ldso/include/dl-hash.h
@@ -0,0 +1,118 @@
+#ifndef _LD_HASH_H_
+#define _LD_HASH_H_
+
+#ifndef RTLD_NEXT
+#define RTLD_NEXT	((void*)-1)
+#endif
+
+struct dyn_elf{
+  unsigned long flags;
+  struct elf_resolve * dyn;
+  struct dyn_elf * next_handle;  /* Used by dlopen et al. */
+  struct dyn_elf * next;
+  struct dyn_elf * prev;
+};
+ 
+struct elf_resolve{
+  /* These entries must be in this order to be compatible with the interface used
+     by gdb to obtain the list of symbols. */
+  char * loadaddr;
+  char * libname;
+  unsigned long dynamic_addr;
+  struct elf_resolve * next;
+  struct elf_resolve * prev;
+  /* Nothing after this address is used by gdb. */
+  enum {elf_lib, elf_executable,program_interpreter, loaded_file} libtype;
+  struct dyn_elf * symbol_scope;
+  unsigned short usage_count;
+  unsigned short int init_flag;
+  unsigned int nbucket;
+  unsigned long * elf_buckets;
+  /*
+   * These are only used with ELF style shared libraries
+   */
+  unsigned long nchain;
+  unsigned long * chains;
+  unsigned long dynamic_info[24];
+
+  unsigned long dynamic_size;
+  unsigned long n_phent;
+  Elf32_Phdr * ppnt;
+
+#if defined(__mips__)
+  /* Needed for MIPS relocation */
+  unsigned long mips_gotsym;
+  unsigned long mips_local_gotno;
+  unsigned long mips_symtabno;
+#endif
+
+#ifdef __powerpc__
+  /* this is used to store the address of relocation data words, so
+   * we don't have to calculate it every time, which requires a divide */
+  unsigned long data_words;
+#endif
+};
+
+#if 0
+/*
+ * The DT_DEBUG entry in the .dynamic section is given the address of this structure.
+ * gdb can pick this up to obtain the correct list of loaded modules.
+ */
+
+struct r_debug{
+  int r_version;
+  struct elf_resolve * link_map;
+  unsigned long brk_fun;
+  enum {RT_CONSISTENT, RT_ADD, RT_DELETE};
+  unsigned long ldbase;
+};
+#endif
+
+#define COPY_RELOCS_DONE 1
+#define RELOCS_DONE 2
+#define JMP_RELOCS_DONE 4
+#define INIT_FUNCS_CALLED 8
+
+extern struct dyn_elf     * _dl_symbol_tables;
+extern struct elf_resolve * _dl_loaded_modules;
+extern struct dyn_elf 	  * _dl_handles;
+
+extern struct elf_resolve * _dl_check_hashed_files(const char * libname);
+extern struct elf_resolve * _dl_add_elf_hash_table(const char * libname, 
+	char * loadaddr, unsigned long * dynamic_info, 
+	unsigned long dynamic_addr, unsigned long dynamic_size);
+
+enum caller_type{symbolrel=0,copyrel=1,resolver=2};
+extern char * _dl_find_hash(const char * name, struct dyn_elf * rpnt1, 
+	struct elf_resolve * f_tpnt, enum caller_type);
+
+extern int _dl_linux_dynamic_link(void);
+
+extern char * _dl_library_path;
+extern char * _dl_not_lazy;
+extern unsigned long _dl_elf_hash(const char * name);
+
+static inline int _dl_symbol(char * name)
+{
+  if(name[0] != '_' || name[1] != 'd' || name[2] != 'l' || name[3] != '_')
+    return 0;
+  return 1;
+}
+
+
+#define LD_ERROR_NOFILE 1
+#define LD_ERROR_NOZERO 2
+#define LD_ERROR_NOTELF 3
+#define LD_ERROR_NOTMAGIC 4
+#define LD_ERROR_NOTDYN 5
+#define LD_ERROR_MMAP_FAILED 6
+#define LD_ERROR_NODYNAMIC 7
+#define LD_WRONG_RELOCS 8
+#define LD_BAD_HANDLE 9
+#define LD_NO_SYMBOL 10
+
+
+
+#endif /* _LD_HASH_H_ */
+
+
-- 
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