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authorEric Andersen <andersen@codepoet.org>2003-08-19 06:05:34 +0000
committerEric Andersen <andersen@codepoet.org>2003-08-19 06:05:34 +0000
commitbca6a155c79147f706242ed7c590a3538e407a40 (patch)
tree17c7d7784edc61f3984fb3255672f3ecfe826d22 /ldso/include/ld_hash.h
parentfd47fd4039cadf42620bbfce43c3a0338e23ee26 (diff)
Phase one of my evil plan to clean up ld.so...
Diffstat (limited to 'ldso/include/ld_hash.h')
-rw-r--r--ldso/include/ld_hash.h118
1 files changed, 118 insertions, 0 deletions
diff --git a/ldso/include/ld_hash.h b/ldso/include/ld_hash.h
new file mode 100644
index 000000000..d7ed5ab2c
--- /dev/null
+++ b/ldso/include/ld_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_ */
+
+