diff options
Diffstat (limited to 'linker/linker.h')
| -rw-r--r-- | linker/linker.h | 184 |
1 files changed, 87 insertions, 97 deletions
diff --git a/linker/linker.h b/linker/linker.h index cb33602..51869e7 100644 --- a/linker/linker.h +++ b/linker/linker.h @@ -36,54 +36,39 @@ #include <link.h> -#undef PAGE_MASK -#undef PAGE_SIZE -#define PAGE_SIZE 4096 -#define PAGE_MASK (PAGE_SIZE-1) +// Returns the address of the page containing address 'x'. +#define PAGE_START(x) ((x) & PAGE_MASK) -/* Convenience macros to make page address/offset computations more explicit */ +// Returns the offset of address 'x' in its page. +#define PAGE_OFFSET(x) ((x) & ~PAGE_MASK) -/* Returns the address of the page starting at address 'x' */ -#define PAGE_START(x) ((x) & ~PAGE_MASK) - -/* Returns the offset of address 'x' in its memory page, i.e. this is the - * same than 'x' - PAGE_START(x) */ -#define PAGE_OFFSET(x) ((x) & PAGE_MASK) - -/* Returns the address of the next page after address 'x', unless 'x' is - * itself at the start of a page. Equivalent to: - * - * (x == PAGE_START(x)) ? x : PAGE_START(x)+PAGE_SIZE - */ +// Returns the address of the next page after address 'x', unless 'x' is +// itself at the start of a page. #define PAGE_END(x) PAGE_START((x) + (PAGE_SIZE-1)) -void debugger_init(); - -/* magic shared structures that GDB knows about */ +// 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; +struct link_map { + uintptr_t l_addr; + char * l_name; + uintptr_t l_ld; + struct link_map * l_next; + struct link_map * l_prev; }; // Values for r_debug->state enum { - RT_CONSISTENT, - RT_ADD, - RT_DELETE + 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; +struct r_debug { + int32_t r_version; + struct link_map* r_map; + void (*r_brk)(void); + int32_t r_state; + uintptr_t r_ldbase; }; #define FLAG_LINKED 0x00000001 @@ -94,82 +79,86 @@ struct r_debug #define SOINFO_NAME_LEN 128 struct soinfo { - char name[SOINFO_NAME_LEN]; - const Elf32_Phdr *phdr; - int phnum; - unsigned entry; - unsigned base; - unsigned size; + char name[SOINFO_NAME_LEN]; + const Elf32_Phdr* phdr; + int phnum; + unsigned entry; + unsigned base; + unsigned size; - int unused; // DO NOT USE, maintained for compatibility. + int unused; // DO NOT USE, maintained for compatibility. - unsigned *dynamic; + unsigned* dynamic; - unsigned unused2; // DO NOT USE, maintained for compatibility - unsigned unused3; // DO NOT USE, maintained for compatibility + unsigned unused2; // DO NOT USE, maintained for compatibility + unsigned unused3; // DO NOT USE, maintained for compatibility - soinfo *next; - unsigned flags; + soinfo* next; + unsigned flags; - const char *strtab; - Elf32_Sym *symtab; + const char* strtab; + Elf32_Sym* symtab; - unsigned nbucket; - unsigned nchain; - unsigned *bucket; - unsigned *chain; + unsigned nbucket; + unsigned nchain; + unsigned* bucket; + unsigned* chain; - unsigned *plt_got; + unsigned* plt_got; - Elf32_Rel *plt_rel; - unsigned plt_rel_count; + Elf32_Rel* plt_rel; + unsigned plt_rel_count; - Elf32_Rel *rel; - unsigned rel_count; + Elf32_Rel* rel; + unsigned rel_count; - unsigned *preinit_array; - unsigned preinit_array_count; + unsigned* preinit_array; + unsigned preinit_array_count; - unsigned *init_array; - unsigned init_array_count; - unsigned *fini_array; - unsigned fini_array_count; + unsigned* init_array; + unsigned init_array_count; + unsigned* fini_array; + unsigned fini_array_count; - void (*init_func)(void); - void (*fini_func)(void); + void (*init_func)(); + void (*fini_func)(); #if defined(ANDROID_ARM_LINKER) - /* ARM EABI section used for stack unwinding. */ - unsigned *ARM_exidx; - unsigned ARM_exidx_count; + // ARM EABI section used for stack unwinding. + unsigned* ARM_exidx; + unsigned ARM_exidx_count; #elif defined(ANDROID_MIPS_LINKER) #if 0 - /* not yet */ - unsigned *mips_pltgot + // Not yet. + unsigned* mips_pltgot +#endif + unsigned mips_symtabno; + unsigned mips_local_gotno; + unsigned mips_gotsym; #endif - unsigned mips_symtabno; - unsigned mips_local_gotno; - unsigned mips_gotsym; -#endif /* ANDROID_*_LINKER */ - - unsigned refcount; - struct link_map linkmap; - int constructors_called; + unsigned refcount; + struct link_map linkmap; - /* When you read a virtual address from the ELF file, add this - * value to get the corresponding address in the process' address space */ - Elf32_Addr load_bias; + bool constructors_called; - bool has_text_relocations; - bool has_DT_SYMBOLIC; -}; + // When you read a virtual address from the ELF file, add this + // value to get the corresponding address in the process' address space. + Elf32_Addr load_bias; + bool has_text_relocations; + bool has_DT_SYMBOLIC; -extern soinfo libdl_info; + void CallConstructors(); + void CallDestructors(); + void CallPreInitConstructors(); + private: + void CallArray(const char* array_name, unsigned* array, int count, bool reverse); + void CallFunction(const char* function_name, void (*function)()); +}; -#include <asm/elf.h> +extern soinfo libdl_info; #if defined(ANDROID_ARM_LINKER) @@ -218,16 +207,17 @@ extern soinfo libdl_info; #define DT_PREINIT_ARRAYSZ 33 #endif -soinfo *find_library(const char *name); -Elf32_Sym *lookup(const char *name, soinfo **found, soinfo *start); -soinfo *find_containing_library(const void *addr); -const char *linker_get_error(void); +soinfo* do_dlopen(const char* name); +int do_dlclose(soinfo* si); + +Elf32_Sym* lookup(const char* name, soinfo** found, soinfo* start); +soinfo* find_containing_library(const void* addr); +const char* linker_get_error(); -int soinfo_unload(soinfo* si); -Elf32_Sym *soinfo_find_symbol(soinfo* si, const void *addr); -Elf32_Sym *soinfo_lookup(soinfo *si, const char *name); -void soinfo_call_constructors(soinfo *si); +Elf32_Sym* soinfo_find_symbol(soinfo* si, const void* addr); +Elf32_Sym* soinfo_lookup(soinfo* si, const char* name); +void debugger_init(); extern "C" void notify_gdb_of_libraries(); #endif |