| rsc | cfa37a7 | 2004-04-10 18:53:55 +0000 | [diff] [blame] | 1 | .TH GETCALLERPC 3 |
| 2 | .SH NAME |
| 3 | getcallerpc \- fetch return PC of current function |
| 4 | .SH SYNOPSIS |
| 5 | .br |
| 6 | .B #include <u.h> |
| 7 | .br |
| 8 | .B #include <libc.h> |
| 9 | .PP |
| 10 | .B ulong getcallerpc(void *firstarg) |
| 11 | .SH DESCRIPTION |
| 12 | .I Getcallerpc |
| 13 | is a portable way to discover the PC to which the current function will return. |
| 14 | .I Firstarg |
| 15 | should be a pointer to the first argument to the function in question. |
| 16 | .SH EXAMPLE |
| 17 | .IP |
| 18 | .EX |
| 19 | void |
| 20 | printpc(ulong arg) |
| 21 | { |
| 22 | print("Called from %.8lux\en", getcallerpc(&arg)); |
| 23 | } |
| 24 | |
| 25 | void |
| 26 | main(int argc, char *argv[]) |
| 27 | { |
| 28 | printpc(0); |
| 29 | printpc(0); |
| 30 | printpc(0); |
| 31 | } |
| 32 | .EE |
| 33 | .SH SOURCE |
| rsc | c3674de | 2005-01-11 17:37:33 +0000 | [diff] [blame] | 34 | .B \*9/src/lib9/ |
| rsc | cfa37a7 | 2004-04-10 18:53:55 +0000 | [diff] [blame] | 35 | .SH BUGS |
| 36 | The |
| 37 | .I firstarg |
| 38 | parameter should not be necessary. |
