diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/init-first.h')
| -rw-r--r-- | sysdeps/unix/sysv/linux/init-first.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/init-first.h b/sysdeps/unix/sysv/linux/init-first.h new file mode 100644 index 0000000000..dd4f85af9d --- /dev/null +++ b/sysdeps/unix/sysv/linux/init-first.h @@ -0,0 +1,31 @@ +/* The job of this fragment it to find argc and friends for INIT. + This is done in one of two ways: either in the stack context + of program start, or having dlopen pass them in. */ + +#define SYSDEP_CALL_INIT(NAME, INIT) \ +void NAME (void *arg) \ +{ \ + int argc; \ + char **argv, **envp; \ + /* The next variable is only here to work around a bug in gcc <= 2.7.2.1. \ + If the address would be taken inside the expression the optimizer \ + would try to be too smart and throws it away. Grrr. */ \ + int *dummy_addr = &_dl_starting_up; \ + \ + __libc_multiple_libcs = dummy_addr && !_dl_starting_up; \ + \ + if (!__libc_multiple_libcs) \ + { \ + argc = (int) arg; \ + argv = (char **) &arg + 1; \ + envp = &argv[argc+1]; \ + } \ + else \ + { \ + argc = (int) arg; \ + argv = ((char ***) &arg)[1]; \ + envp = ((char ***) &arg)[2]; \ + } \ + \ + INIT (argc, argv, envp); \ +} |