| .TH GETCALLERPC 3 |
| .SH NAME |
| getcallerpc \- fetch return PC of current function |
| .SH SYNOPSIS |
| .br |
| .B #include <u.h> |
| .br |
| .B #include <libc.h> |
| .PP |
| .B ulong getcallerpc(void *firstarg) |
| .SH DESCRIPTION |
| .I Getcallerpc |
| is a portable way to discover the PC to which the current function will return. |
| .I Firstarg |
| should be a pointer to the first argument to the function in question. |
| .SH EXAMPLE |
| .IP |
| .EX |
| void |
| printpc(ulong arg) |
| { |
| print("Called from %.8lux\en", getcallerpc(&arg)); |
| } |
| |
| void |
| main(int argc, char *argv[]) |
| { |
| printpc(0); |
| printpc(0); |
| printpc(0); |
| } |
| .EE |
| .SH SOURCE |
| .B \*9/src/lib9/ |
| .SH BUGS |
| The |
| .I firstarg |
| parameter should not be necessary. |
