1 files changed, 185 insertions, 0 deletions
diff --git a/linker/linker.h b/linker/linker.h
new file mode 100644
index 0000000..ab2c385
--- /dev/null
+++ b/linker/linker.h
@@ -0,0 +1,185 @@
+#ifndef _LINKER_H_
+#define _LINKER_H_
+
+#include <unistd.h>
+#include <sys/types.h>
+#include <linux/elf.h>
+
+#undef PAGE_MASK
+#undef PAGE_SIZE
+#define PAGE_SIZE 4096
+#define PAGE_MASK 4095
+
+void debugger_init();
+const char *addr_to_name(unsigned addr);
+
+/* magic shared structures that GDB knows about */
+
+struct link_map
+{
+    uintptr_t l_addr;
+    char * l_name;
+    uintptr_t l_ld;
+    struct link_map * l_next;
+    struct link_map * l_prev;
+};
+
+/* needed for dl_iterate_phdr to be passed to the callbacks provided */
+struct dl_phdr_info
+{
+    Elf32_Addr dlpi_addr;
+    const char *dlpi_name;
+    const Elf32_Phdr *dlpi_phdr;
+    Elf32_Half dlpi_phnum;
+};
+
+
+// Values for r_debug->state
+enum {
+    RT_CONSISTENT,
+    RT_ADD,
+    RT_DELETE
+};
+
+struct r_debug
+{
+    int32_t r_version;
+    struct link_map * r_map;
+    void (*r_brk)(void);
+    int32_t r_state;
+    uintptr_t r_ldbase;
+};
+
+typedef struct soinfo soinfo;
+
+#define FLAG_LINKED     0x00000001
+#define FLAG_ERROR      0x00000002
+#define FLAG_EXE        0x00000004 // The main executable
+#define FLAG_PRELINKED  0x00000008 // This is a pre-linked lib
+
+#define SOINFO_NAME_LEN 128
+
+struct soinfo
+{
+    const char name[SOINFO_NAME_LEN];
+    Elf32_Phdr *phdr;
+    int phnum;
+    unsigned entry;
+    unsigned base;
+    unsigned size;
+
+    unsigned *dynamic;
+
+    unsigned wrprotect_start;
+    unsigned wrprotect_end;
+
+    soinfo *next;
+    unsigned flags;
+
+    const char *strtab;
+    Elf32_Sym *symtab;
+
+    unsigned nbucket;
+    unsigned nchain;
+    unsigned *bucket;
+    unsigned *chain;
+
+    unsigned *plt_got;
+
+    Elf32_Rel *plt_rel;
+    unsigned plt_rel_count;
+
+    Elf32_Rel *rel;
+    unsigned rel_count;
+
+    unsigned *preinit_array;
+    unsigned preinit_array_count;
+
+    unsigned *init_array;
+    unsigned init_array_count;
+    unsigned *fini_array;
+    unsigned fini_array_count;
+
+    void (*init_func)(void);
+    void (*fini_func)(void);
+
+#ifdef ANDROID_ARM_LINKER
+    /* ARM EABI section used for stack unwinding. */
+    unsigned *ARM_exidx;
+    unsigned ARM_exidx_count;
+#endif
+
+    unsigned refcount;
+    struct link_map linkmap;
+};
+
+
+extern soinfo libdl_info;
+
+/* these must all be powers of two */
+#define LIBBASE 0x80000000
+#define LIBLAST 0x90000000
+#define LIBINC  0x00100000
+
+
+#ifdef ANDROID_ARM_LINKER
+
+#define R_ARM_COPY       20
+#define R_ARM_GLOB_DAT   21
+#define R_ARM_JUMP_SLOT  22
+#define R_ARM_RELATIVE   23
+
+#elif defined(ANDROID_X86_LINKER)
+
+#define R_386_32         1
+#define R_386_PC32       2
+#define R_386_GLOB_DAT   6
+#define R_386_JUMP_SLOT  7
+#define R_386_RELATIVE   8
+
+#endif /* ANDROID_*_LINKER */
+
+
+#ifndef DT_INIT_ARRAY
+#define DT_INIT_ARRAY      25
+#endif
+
+#ifndef DT_FINI_ARRAY
+#define DT_FINI_ARRAY      26
+#endif
+
+#ifndef DT_INIT_ARRAYSZ
+#define DT_INIT_ARRAYSZ    27
+#endif
+
+#ifndef DT_FINI_ARRAYSZ
+#define DT_FINI_ARRAYSZ    28
+#endif
+
+#ifndef DT_PREINIT_ARRAY
+#define DT_PREINIT_ARRAY   32
+#endif
+
+#ifndef DT_PREINIT_ARRAYSZ
+#define DT_PREINIT_ARRAYSZ 33
+#endif
+
+/* in theory we only need the above relative relocations,
+   but in practice the following one turns up from time
+   to time.  fushigi na.
+*/
+#define R_ARM_ABS32      2
+
+soinfo *find_library(const char *name);
+unsigned unload_library(soinfo *si);
+Elf32_Sym *lookup_in_library(soinfo *si, const char *name);
+Elf32_Sym *lookup(const char *name, unsigned *base);
+
+#ifdef ANDROID_ARM_LINKER 
+typedef long unsigned int *_Unwind_Ptr;
+_Unwind_Ptr dl_unwind_find_exidx(_Unwind_Ptr pc, int *pcount);
+#elif defined(ANDROID_X86_LINKER)
+int dl_iterate_phdr(int (*cb)(struct dl_phdr_info *, size_t, void *), void *);
+#endif
+
+#endif