13.13. Data Definitions for libgcc_s

This section defines global identifiers and their values that are associated with interfaces contained in libgcc_s. These definitions are organized into groups that correspond to system headers. This convention is used as a convenience for the reader, and does not imply the existence of these headers, or their content. Where an interface is defined as requiring a particular system header file all of the data definitions for that system header file presented here shall be in effect.

This section gives data definitions to promote binary application portability, not to repeat source interface definitions available elsewhere. System providers and application developers should use this ABI to supplement - not to replace - source interface definition specifications.

This specification uses the ISO C (1999) C Language as the reference programming language, and data definitions are specified in ISO C format. The C language is used here as a convenient notation. Using a C language description of these data objects does not preclude their use by other programming languages.

13.13.1. unwind.h

struct _Unwind_Context;

typedef void *_Unwind_Ptr;
typedef unsigned int _Unwind_Word;

typedef enum {
    _URC_NO_REASON = 0,
    _URC_END_OF_STACK = 5,
} _Unwind_Reason_Code;

struct _Unwind_Exception {
    u_int64_t exception_class;
    _Unwind_Exception_Cleanup_Fn exception_cleanup;
    u_int64_t private_1;
    u_int64_t private_2;

#define _UA_SEARCH_PHASE	1
#define _UA_END_OF_STACK	16
#define _UA_FORCE_UNWIND	8