ptrace() Request Values

The ptrace() facility is implemented on top of /proc. New applications should use proc(4) directly.

The ptrace() routine in Solaris 7 software is present solely to support applications running in BCP mode. It uses integers 1 - 9 as request values, while the SunOS release 4.x routine defines request values as symbolic constants in <sys/ptrace.h>. The following SunOS release 4.x request symbolic constants are compatible with Solaris 7 software.

• PTRACE_TRACEME

• PTRACE_PEEKTEXT

• PTRACE_PEEKDATA

• PTRACE_PEEKUSER

• PTRACE_POKETEXT

• PTRACE_POKEDATA

• PTRACE_POKEUSER

• PTRACE_CONT

• PTRACE_KILL

• PTRACE_SINGLESTEP

The SunOS release 4.x PTRACE_CONT addr argument specifies where the stopped process should resume execution, unless addr = 1, in which case execution resumes from where the process had stopped. The equivalent Solaris 7 request 7 requires that addr always be equal to 1 and that execution always resumes from where the process stopped. Also, the Solaris 7 request 7 cancels all pending signals before the process resumes execution except those specified by data. The SunOS release 4.x PTRACE_CONT does not cancel all pending signals.

Table 16-2 shows SunOS release 4.x valid requests that are not supported by the Solaris 7 ptrace() routine.

Table 16-2 ptrace() Requests not Supported by Solaris 7 Software

PTRACE_ATTACH	PTRACE_GETWINDOW
PTRACE_DETACH	PTRACE_SETWINDOW
PTRACE_GETREGS	PTRACE_22
PTRACE_SETREGS	PTRACE_23
PTRACE_GETFPREGS	PTRACE_26
PTRACE_SETFPREGS	PTRACE_27
PTRACE_READDATA	PTRACE_28
PTRACE_WRITEDATA	PTRACE_SYSCALL
PTRACE_READTEXT	PTRACE_DUMPCORE
PTRACE_WRITETEXT	PTRACE_SETWRBKPT
PTRACE_GETFPAREGS	PTRACE_SETACBKPT
PTRACE_SETFPAREGS	PTRACE_CLRDR7