va_list on PowerPC

[Gabriel Dos Reis]

Hi,

The PowerPC processor System V ABI Supplement linked from our
"Further Readings" page states that va_list should have a definition
semantically equivalent to the following

    typedef struct {
      char gpr;
      char fpr;
      char *overflow_arg_area;
      char *reg_save_area;
    } va_list[1];


However, I failed to find any definition to that effect for the
PowerPC target in GCC sources.  Could someone enlighten me?

Thanks,

-- Gaby