diff options
Diffstat (limited to 'include/libc-symbols.h')
| -rw-r--r-- | include/libc-symbols.h | 198 |
1 files changed, 160 insertions, 38 deletions
diff --git a/include/libc-symbols.h b/include/libc-symbols.h index 0c219514b1..d322147f97 100644 --- a/include/libc-symbols.h +++ b/include/libc-symbols.h @@ -82,8 +82,15 @@ # define ASM_LINE_SEP ; #endif -#ifndef C_SYMBOL_DOT_NAME -# define C_SYMBOL_DOT_NAME(name) .##name +#ifdef HAVE_ASM_GLOBAL_DOT_NAME +# ifndef C_SYMBOL_DOT_NAME +# if defined __GNUC__ && defined __GNUC_MINOR__ \ + && (__GNUC__ << 16) + __GNUC_MINOR__ >= (3 << 16) + 1 +# define C_SYMBOL_DOT_NAME(name) .name +# else +# define C_SYMBOL_DOT_NAME(name) .##name +# endif +# endif #endif #ifndef __ASSEMBLER__ @@ -111,9 +118,21 @@ /* Declare SYMBOL as weak undefined symbol (resolved to 0 if not defined). */ # define weak_extern(symbol) _weak_extern (symbol) # ifdef HAVE_ASM_WEAKEXT_DIRECTIVE -# define _weak_extern(symbol) asm (".weakext " __SYMBOL_PREFIX #symbol); +# ifdef HAVE_ASM_GLOBAL_DOT_NAME +# define _weak_extern(symbol) \ + asm (".weakext " __SYMBOL_PREFIX #symbol "\n\t" \ + ".weakext ." __SYMBOL_PREFIX #symbol); +# else +# define _weak_extern(symbol) asm (".weakext " __SYMBOL_PREFIX #symbol); +# endif # else -# define _weak_extern(symbol) asm (".weak " __SYMBOL_PREFIX #symbol); +# ifdef HAVE_ASM_GLOBAL_DOT_NAME +# define _weak_extern(symbol) \ + asm (".weak " __SYMBOL_PREFIX #symbol "\n\t" \ + ".weak ." __SYMBOL_PREFIX #symbol); +# else +# define _weak_extern(symbol) asm (".weak " __SYMBOL_PREFIX #symbol); +# endif # endif # else @@ -126,45 +145,67 @@ #else /* __ASSEMBLER__ */ # ifdef HAVE_ASM_SET_DIRECTIVE -# define strong_alias(original, alias) \ - ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME (alias) ASM_LINE_SEP \ +# ifdef HAVE_ASM_GLOBAL_DOT_NAME +# define strong_alias(original, alias) \ + ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME (alias) ASM_LINE_SEP \ + .set C_SYMBOL_NAME (alias),C_SYMBOL_NAME (original) ASM_LINE_SEP \ + ASM_GLOBAL_DIRECTIVE C_SYMBOL_DOT_NAME (alias) ASM_LINE_SEP \ + .set C_SYMBOL_DOT_NAME (alias),C_SYMBOL_DOT_NAME (original) +# define strong_data_alias(original, alias) \ + ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME (alias) ASM_LINE_SEP \ .set C_SYMBOL_NAME (alias),C_SYMBOL_NAME (original) +# else +# define strong_alias(original, alias) \ + ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME (alias) ASM_LINE_SEP \ + .set C_SYMBOL_NAME (alias),C_SYMBOL_NAME (original) +# define strong_data_alias(original, alias) strong_alias(original, alias) +# endif # else # ifdef HAVE_ASM_GLOBAL_DOT_NAME -# define strong_alias(original, alias) \ - ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME (alias) ASM_LINE_SEP \ - C_SYMBOL_NAME (alias) = C_SYMBOL_NAME (original) ASM_LINE_SEP \ - ASM_GLOBAL_DIRECTIVE C_SYMBOL_DOT_NAME (alias) ASM_LINE_SEP \ +# define strong_alias(original, alias) \ + ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME (alias) ASM_LINE_SEP \ + C_SYMBOL_NAME (alias) = C_SYMBOL_NAME (original) ASM_LINE_SEP \ + ASM_GLOBAL_DIRECTIVE C_SYMBOL_DOT_NAME (alias) ASM_LINE_SEP \ C_SYMBOL_DOT_NAME (alias) = C_SYMBOL_DOT_NAME (original) +# define strong_data_alias(original, alias) \ + ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME (alias) ASM_LINE_SEP \ + C_SYMBOL_NAME (alias) = C_SYMBOL_NAME (original) # else -# define strong_alias(original, alias) \ - ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME (alias) ASM_LINE_SEP \ +# define strong_alias(original, alias) \ + ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME (alias) ASM_LINE_SEP \ C_SYMBOL_NAME (alias) = C_SYMBOL_NAME (original) +# define strong_data_alias(original, alias) strong_alias(original, alias) # endif # endif # ifdef HAVE_WEAK_SYMBOLS # ifdef HAVE_ASM_WEAKEXT_DIRECTIVE -# define weak_alias(original, alias) \ +# ifdef HAVE_ASM_GLOBAL_DOT_NAME +# define weak_alias(original, alias) \ + .weakext C_SYMBOL_NAME (alias), C_SYMBOL_NAME (original) ASM_LINE_SEP \ + .weakext C_SYMBOL_DOT_NAME (alias), C_SYMBOL_DOT_NAME (original) +# else +# define weak_alias(original, alias) \ .weakext C_SYMBOL_NAME (alias), C_SYMBOL_NAME (original) -# define weak_extern(symbol) \ +# endif +# define weak_extern(symbol) \ .weakext C_SYMBOL_NAME (symbol) # else /* ! HAVE_ASM_WEAKEXT_DIRECTIVE */ # ifdef HAVE_ASM_GLOBAL_DOT_NAME -# define weak_alias(original, alias) \ - .weak C_SYMBOL_NAME (alias) ASM_LINE_SEP \ - C_SYMBOL_NAME (alias) = C_SYMBOL_NAME (original) ASM_LINE_SEP \ - ASM_GLOBAL_DIRECTIVE C_SYMBOL_DOT_NAME (alias) ASM_LINE_SEP \ +# define weak_alias(original, alias) \ + .weak C_SYMBOL_NAME (alias) ASM_LINE_SEP \ + C_SYMBOL_NAME (alias) = C_SYMBOL_NAME (original) ASM_LINE_SEP \ + .weak C_SYMBOL_DOT_NAME (alias) ASM_LINE_SEP \ C_SYMBOL_DOT_NAME (alias) = C_SYMBOL_DOT_NAME (original) # else -# define weak_alias(original, alias) \ - .weak C_SYMBOL_NAME (alias) ASM_LINE_SEP \ +# define weak_alias(original, alias) \ + .weak C_SYMBOL_NAME (alias) ASM_LINE_SEP \ C_SYMBOL_NAME (alias) = C_SYMBOL_NAME (original) # endif -# define weak_extern(symbol) \ +# define weak_extern(symbol) \ .weak C_SYMBOL_NAME (symbol) # endif /* ! HAVE_ASM_WEAKEXT_DIRECTIVE */ @@ -364,15 +405,33 @@ # define default_symbol_version(real, name, version) \ _default_symbol_version(real, name, version) # ifdef __ASSEMBLER__ -# define _symbol_version(real, name, version) \ +# ifdef HAVE_ASM_GLOBAL_DOT_NAME +# define _symbol_version(real, name, version) \ + .symver real, name##@##version ASM_LINE_SEP \ + .symver .##real, .##name##@##version +# define _default_symbol_version(real, name, version) \ + .symver real, name##@##@##version ASM_LINE_SEP \ + .symver .##real, .##name##@##@##version +# else +# define _symbol_version(real, name, version) \ .symver real, name##@##version -# define _default_symbol_version(real, name, version) \ +# define _default_symbol_version(real, name, version) \ .symver real, name##@##@##version +# endif # else -# define _symbol_version(real, name, version) \ +# ifdef HAVE_ASM_GLOBAL_DOT_NAME +# define _symbol_version(real, name, version) \ + __asm__ (".symver " #real "," #name "@" #version "\n\t" \ + ".symver ." #real ",." #name "@" #version) +# define _default_symbol_version(real, name, version) \ + __asm__ (".symver " #real "," #name "@@" #version "\n\t" \ + ".symver ." #real ",." #name "@@" #version) +# else +# define _symbol_version(real, name, version) \ __asm__ (".symver " #real "," #name "@" #version) -# define _default_symbol_version(real, name, version) \ +# define _default_symbol_version(real, name, version) \ __asm__ (".symver " #real "," #name "@@" #version) +# endif # endif #else # define symbol_version(real, name, version) @@ -439,6 +498,21 @@ } libc_hidden_weak (foo) + Simularly for global data. If references to foo within libc.so should + always go to foo defined in libc.so, then in include/foo.h you add: + + libc_hidden_proto (foo) + + line and after foo's definition: + + int foo = INITIAL_FOO_VALUE; + libc_hidden_data_def (foo) + + or + + int foo = INITIAL_FOO_VALUE; + libc_hidden_data_weak (foo) + If foo is normally just an alias (strong or weak) of some other function, you should use the normal strong_alias first, then add libc_hidden_def or libc_hidden_weak: @@ -494,43 +568,63 @@ # define __hidden_def1(original, alias) \ ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME (alias) ASM_LINE_SEP \ .set C_SYMBOL_NAME (alias), C_SYMBOL_NAME (original) -# else # ifdef HAVE_ASM_GLOBAL_DOT_NAME -# define __hidden_def1(original, alias) \ - ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME (alias) ASM_LINE_SEP \ - C_SYMBOL_NAME (alias) = C_SYMBOL_NAME (original) ASM_LINE_SEP \ +# define __hidden_dot_def1(original, alias) ASM_LINE_SEP \ ASM_GLOBAL_DIRECTIVE C_SYMBOL_DOT_NAME (alias) ASM_LINE_SEP \ - C_SYMBOL_DOT_NAME (alias) = C_SYMBOL_DOT_NAME (original) + .set C_SYMBOL_DOT_NAME (alias), C_SYMBOL_DOT_NAME (original) # else -# define __hidden_def1(original, alias) \ +# define __hidden_dot_def1(original, alias) +# endif +# else +# define __hidden_def1(original, alias) \ ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME (alias) ASM_LINE_SEP \ C_SYMBOL_NAME (alias) = C_SYMBOL_NAME (original) +# ifdef HAVE_ASM_GLOBAL_DOT_NAME +# define __hidden_dot_def1(original, alias) ASM_LINE_SEP \ + ASM_GLOBAL_DIRECTIVE C_SYMBOL_DOT_NAME (alias) ASM_LINE_SEP \ + C_SYMBOL_DOT_NAME (alias) = C_SYMBOL_DOT_NAME (original) +# else +# define __hidden_def1(original, alias) # endif # endif # define __hidden_def2(...) #__VA_ARGS__ # define __hidden_def3(...) __hidden_def2 (__VA_ARGS__) # define hidden_def(name) \ + __asm__ (__hidden_def3 (__hidden_def1 (__GI_##name, name) \ + __hidden_dot_def1 (__GI_##name, name))); +# define hidden_data_def(name) \ __asm__ (__hidden_def3 (__hidden_def1 (__GI_##name, name))); # define hidden_ver(local, name) \ + __asm__ (__hidden_def3 (__hidden_def1 (local, __GI_##name) \ + __hidden_dot_def1 (local, __GI_##name))); +# define hidden_data_ver(local, name) \ __asm__ (__hidden_def3 (__hidden_def1 (local, __GI_##name))); # ifdef HAVE_WEAK_SYMBOLS # ifdef HAVE_ASM_WEAKEXT_DIRECTIVE # define __hidden_weak1(original, alias) \ .weakext C_SYMBOL_NAME (alias), C_SYMBOL_NAME (original) -# else /* ! HAVE_ASM_WEAKEXT_DIRECTIVE */ # ifdef HAVE_ASM_GLOBAL_DOT_NAME -# define __hidden_weak1(original, alias) \ +# define __hidden_dot_weak1(original, alias) ASM_LINE_SEP \ + .weakext C_SYMBOL_DOT_NAME (alias), C_SYMBOL_DOT_NAME (original) +# else +# define __hidden_dot_weak1(original, alias) +# endif +# else /* ! HAVE_ASM_WEAKEXT_DIRECTIVE */ +# define __hidden_weak1(original, alias) \ .weak C_SYMBOL_NAME (alias) ASM_LINE_SEP \ - C_SYMBOL_NAME (alias) = C_SYMBOL_NAME (original) ASM_LINE_SEP \ + C_SYMBOL_NAME (alias) = C_SYMBOL_NAME (original) +# ifdef HAVE_ASM_GLOBAL_DOT_NAME +# define __hidden_dot_weak1(original, alias) ASM_LINE_SEP \ ASM_GLOBAL_DIRECTIVE C_SYMBOL_DOT_NAME (alias) ASM_LINE_SEP \ C_SYMBOL_DOT_NAME (alias) = C_SYMBOL_DOT_NAME (original) # else -# define __hidden_weak1(original, alias) \ - .weak C_SYMBOL_NAME (alias) ASM_LINE_SEP \ - C_SYMBOL_NAME (alias) = C_SYMBOL_NAME (original) +# define __hidden_dot_weak1(original, alias) # endif # endif # define hidden_weak(name) \ + __asm__ (__hidden_def3 (__hidden_weak1 (__GI_##name, name) \ + __hidden_dot_weak1 (__GI_##name, name))); +# define hidden_data_weak(name) \ __asm__ (__hidden_def3 (__hidden_weak1 (__GI_##name, name))); # else # define hidden_weak(name) hidden_def (name) @@ -548,7 +642,14 @@ # define hidden_def(name) strong_alias (name, __GI_##name) # define hidden_weak(name) hidden_def (name) # define hidden_ver(local, name) strong_alias (local, __GI_##name) -# define HIDDEN_JUMPTARGET(name) __GI_##name +# define hidden_data_def(name) strong_data_alias (name, __GI_##name) +# define hidden_data_weak(name) hidden_data_def (name) +# define hidden_data_ver(local, name) strong_data_alias (local, __GI_##name) +# ifdef HAVE_ASM_GLOBAL_DOT_NAME +# define HIDDEN_JUMPTARGET(name) .__GI_##name +# else +# define HIDDEN_JUMPTARGET(name) __GI_##name +# endif # endif #else # ifndef __ASSEMBLER__ @@ -559,6 +660,9 @@ # define hidden_weak(name) # define hidden_def(name) # define hidden_ver(local, name) +# define hidden_data_weak(name) +# define hidden_data_def(name) +# define hidden_data_ver(local, name) #endif #if !defined NOT_IN_libc @@ -566,11 +670,17 @@ # define libc_hidden_def(name) hidden_def (name) # define libc_hidden_weak(name) hidden_weak (name) # define libc_hidden_ver(local, name) hidden_ver (local, name) +# define libc_hidden_data_def(name) hidden_data_def (name) +# define libc_hidden_data_weak(name) hidden_data_weak (name) +# define libc_hidden_data_ver(local, name) hidden_data_ver (local, name) #else # define libc_hidden_proto(name, attrs...) # define libc_hidden_def(name) # define libc_hidden_weak(name) # define libc_hidden_ver(local, name) +# define libc_hidden_data_def(name) +# define libc_hidden_data_weak(name) +# define libc_hidden_data_ver(local, name) #endif #if defined NOT_IN_libc && defined IS_IN_rtld @@ -578,11 +688,17 @@ # define rtld_hidden_def(name) hidden_def (name) # define rtld_hidden_weak(name) hidden_weak (name) # define rtld_hidden_ver(local, name) hidden_ver (local, name) +# define rtld_hidden_data_def(name) hidden_data_def (name) +# define rtld_hidden_data_weak(name) hidden_data_weak (name) +# define rtld_hidden_data_ver(local, name) hidden_data_ver (local, name) #else # define rtld_hidden_proto(name, attrs...) # define rtld_hidden_def(name) # define rtld_hidden_weak(name) # define rtld_hidden_ver(local, name) +# define rtld_hidden_data_def(name) +# define rtld_hidden_data_weak(name) +# define rtld_hidden_data_ver(local, name) #endif #if defined NOT_IN_libc && defined IS_IN_libm @@ -590,11 +706,17 @@ # define libm_hidden_def(name) hidden_def (name) # define libm_hidden_weak(name) hidden_weak (name) # define libm_hidden_ver(local, name) hidden_ver (local, name) +# define libm_hidden_data_def(name) hidden_data_def (name) +# define libm_hidden_data_weak(name) hidden_data_weak (name) +# define libm_hidden_data_ver(local, name) hidden_data_ver (local, name) #else # define libm_hidden_proto(name, attrs...) # define libm_hidden_def(name) # define libm_hidden_weak(name) # define libm_hidden_ver(local, name) +# define libm_hidden_data_def(name) +# define libm_hidden_data_weak(name) +# define libm_hidden_data_ver(local, name) #endif #endif /* libc-symbols.h */ |