sigsafe: sigsafe_internal.h Source File

00001 
00010 #include "sigsafe.h"
00011 
00012 #ifndef SIGSAFE_INTERNAL_H
00013 #define SIGSAFE_INTERNAL_H
00014 
00015 /*
00016  * See Ulrich Drepper's "How to Write Shared Libraries"
00017  * <http://people.redhat.com/drepper/dsohowto.pdf>
00018  * for a description of __attribute__ ((visibility ("hidden")))
00019  * and other good things to know about ELF relocation, symbol versioning, etc.
00020  */
00021 
00022 #if defined(__APPLE_CC__)
00023 #define PRIVATE_DEF(sym) __private_extern__ sym
00024 #define PRIVATE_DEC(sym) __private_extern__ sym
00025 #elif defined(__GNUC__)
00026 #define PRIVATE_DEF(sym) extern __attribute__ ((visibility ("internal"))) sym
00027 #define PRIVATE_DEC(sym) __attribute__ ((visibility ("internal"))) sym
00028 #else
00029 #error "Don't know how to make symbols private on your platform."
00030 #endif
00031 
00038 #if defined(SIGMAX)
00039 #define SIGSAFE_SIGMAX SIGMAX
00040 #elif defined(NSIG)
00041 #define SIGSAFE_SIGMAX (NSIG-1)
00042 #elif defined(_NSIG)
00043 #define SIGSAFE_SIGMAX (_NSIG-1)
00044 #else
00045 #error Not sure how many signals you have
00046 #endif
00047 
00049 struct sigsafe_tsd_ {
00051     volatile sig_atomic_t signal_received;
00052     intptr_t user_data;
00053     void (*destructor)(intptr_t);
00054 };
00055 
00056 struct sigsafe_syscall_ {
00057     const void *minjmp;
00058     const void *maxjmp;
00059     const void *jmpto;
00060 };
00061 
00062 PRIVATE_DEF(struct sigsafe_syscall_ sigsafe_syscalls_[]);
00063 
00064 #ifdef SIGSAFE_NO_SIGINFO
00065 PRIVATE_DEF(void sigsafe_handler_for_platform_(struct sigcontext *ctx));
00066 #else
00067 PRIVATE_DEF(void sigsafe_handler_for_platform_(ucontext_t *ctx));
00068 #endif
00069 
00070 #endif /* !SIGSAFE_INTERNAL_H */