[MIPS] libstdc++ test case problem with respect to try..throw and catch

[Nida M]

Hi,  All

I am executing libstdc++ testsuites for MIPS architecture and

i am getting failures with respect to try..throw..catch related test cases

FAIL: 18_support/14026.cc execution test
FAIL: 19_diagnostics/stdexceptions.cc execution test
FAIL: 21_strings/basic_string/append/char/1.cc execution test
FAIL: 21_strings/basic_string/cons/char/1.cc execution test
FAIL: 21_strings/basic_string/cons/char/3.cc execution test
....
....

I need help to debug this problem.
where can i get the implementation details of try..throw and catch in gcc-3.4.4?

Thnaks & regards
- nidajm