diff options
Diffstat (limited to 'ldso/include/dl-defs.h')
| -rw-r--r-- | ldso/include/dl-defs.h | 51 |
1 files changed, 50 insertions, 1 deletions
diff --git a/ldso/include/dl-defs.h b/ldso/include/dl-defs.h index 3de7f5230..2c4402929 100644 --- a/ldso/include/dl-defs.h +++ b/ldso/include/dl-defs.h @@ -110,7 +110,7 @@ typedef struct { #endif /* Initialize a LOADADDR representing the loader itself. It's only - * called from DL_BOOT, so additional arguments passed to it may be + * called from DL_START, so additional arguments passed to it may be * referenced. */ #ifndef DL_INIT_LOADADDR_BOOT @@ -144,6 +144,12 @@ typedef struct { ((LOADADDR) = (DL_LOADADDR_TYPE)(BASEADDR)) #endif +/* Update LOADADDR with information about PHDR, just mapped to the + given ADDR. */ +#ifndef DL_INIT_LOADADDR_HDR +# define DL_INIT_LOADADDR_HDR(LOADADDR, ADDR, PHDR) /* Do nothing. */ +#endif + /* Convert a DL_LOADADDR_TYPE to an identifying pointer. Used mostly * for debugging. */ @@ -166,6 +172,13 @@ typedef struct { && (!(TFROM) || (TFROM)->loadaddr < (TPNT)->loadaddr)) #endif +/* This is called from dladdr() to give targets that use function descriptors + * a chance to map a function descriptor's address to the function's entry + * point before trying to find in which library it's defined. */ +#ifndef DL_LOOKUP_ADDRESS +#define DL_LOOKUP_ADDRESS(ADDRESS) (ADDRESS) +#endif + /* Use this macro to convert a pointer to a function's entry point to * a pointer to function. The pointer is assumed to have already been * relocated. LOADADDR is passed because it may contain additional @@ -202,4 +215,40 @@ typedef struct { # define DL_FIND_HASH_VALUE(TPNT, TYPE, SYM) (DL_RELOC_ADDR ((SYM)->st_value, (TPNT)->loadaddr)) #endif +/* Unmap all previously-mapped segments accumulated in LOADADDR. + Generally used when an error occurs during loading. */ +#ifndef DL_LOADADDR_UNMAP +# define DL_LOADADDR_UNMAP(LOADADDR, LEN) \ + _dl_munmap((char *) (LOADADDR), (LEN)) +#endif + +/* Similar to DL_LOADADDR_UNMAP, but used for libraries that have been + dlopen()ed successfully, when they're dlclose()d. */ +#ifndef DL_LIB_UNMAP +# define DL_LIB_UNMAP(LIB, LEN) (DL_LOADADDR_UNMAP ((LIB)->loadaddr, (LEN))) +#endif + +/* Define this to verify that a library named LIBNAME, whose ELF + headers are pointed to by EPNT, is suitable for dynamic linking. + If it is not, print an error message (optional) and return NULL. + If the library can have its segments relocated independently, + arrange for PICLIB to be set to 2. If all segments have to be + relocated by the same amount, set it to 1. If it has to be loaded + at physical addresses as specified in the program headers, set it + to 0. A reasonable (?) guess for PICLIB will already be in place, + so it is safe to do nothing here. */ +#ifndef DL_CHECK_LIB_TYPE +# define DL_CHECK_LIB_TYPE(EPNT, PICLIB, PROGNAME, LIBNAME) (void)0 +#endif + +/* Define this if you have special segment. */ +#ifndef DL_IS_SPECIAL_SEGMENT +# define DL_IS_SPECIAL_SEGMENT(EPNT, PPNT) 0 +#endif + +/* Define this if you want to use special method to map the segment. */ +#ifndef DL_MAP_SEGMENT +# define DL_MAP_SEGMENT(EPNT, PPNT, INFILE, FLAGS) 0 +#endif + #endif /* _LD_DEFS_H */ |