diff options
Diffstat (limited to 'elf/dl-error.c')
| -rw-r--r-- | elf/dl-error.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/elf/dl-error.c b/elf/dl-error.c index 52eb577..a19ccff 100644 --- a/elf/dl-error.c +++ b/elf/dl-error.c @@ -37,6 +37,11 @@ struct catch this is null. */ static struct catch *catch; +/* This points to a function which is called when an error is + received. Unlike the handling of `catch' this function may return. + The arguments will be the `errstring' and `objname'. */ +static receiver_fct receiver; + void _dl_signal_error (int errcode, @@ -58,6 +63,13 @@ _dl_signal_error (int errcode, catch->objname = objname; longjmp (catch->env, errcode ?: -1); } + else if (receiver) + { + /* We are inside _dl_receive_error. Call the user supplied + handler and resume the work. The receiver will still + installed. */ + (*receiver) (errstring, objname); + } else { /* Lossage while resolving the program's own symbols is always fatal. */ @@ -77,6 +89,8 @@ _dl_catch_error (char **errstring, { int errcode; struct catch *old, c = { errstring: NULL, objname: NULL }; + /* We need not handle `receiver' since setting a `catch' is handle + before it. */ old = catch; errcode = setjmp (c.env); @@ -96,3 +110,22 @@ _dl_catch_error (char **errstring, *objname = c.objname; return errcode == -1 ? 0 : errcode; } + +void +_dl_receive_error (receiver_fct fct, void (*operate) (void)) +{ + struct catch *old_catch; + receiver_fct old_receiver; + + old_catch = catch; + old_receiver = receiver; + + /* Set the new values. */ + catch = NULL; + receiver = fct; + + (*operate) (); + + catch = old_catch; + receiver = old_receiver; +} |