From 84a5ca8d8e06059e31984d023dad57b91ea618fd Mon Sep 17 00:00:00 2001
From: Craig Small <csmall@users.sourceforge.net>
Date: Wed, 4 Jul 2007 02:25:00 +0000
Subject: [PATCH] ppc patch for peekfd

---
 ChangeLog       |  3 +++
 configure.ac    |  5 +++++
 src/Makefile.am |  4 ++++
 src/peekfd.c    | 25 ++++++++++++++++++++++++-
 4 files changed, 36 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index 5a73d66..04df2ab 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,8 @@
 Changes in ??
 =============
+2007-07-04 Tomas Smetana
+	* Added support for PPC architecture for peekfd
+
 2007-06-25 Craig Small
 	* Updated the Chinese simplified po file
 
diff --git a/configure.ac b/configure.ac
index 98d567f..0bd43f3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -68,6 +68,8 @@ AC_CHECK_MEMBERS([struct user_regs_struct.orig_eax,
 		struct user_regs_struct.rdi,
 		struct user_regs_struct.rsi,
 		struct user_regs_struct.rdx], [],[], [#include <linux/user.h>])
+AC_CHECK_MEMBERS([struct pt_regs.orig_gpr3,
+		struct pt_regs.gpr], [],[], [#include <linux/ptrace.h>])
 AM_CONDITIONAL(WANT_PEEKFD_I386,
  test $ac_cv_member_struct_user_regs_struct_orig_eax = yes &&
    test $ac_cv_member_struct_user_regs_struct_eax = yes &&
@@ -80,6 +82,9 @@ AM_CONDITIONAL(WANT_PEEKFD_X86_64,
    test $ac_cv_member_struct_user_regs_struct_rdi = yes &&
    test $ac_cv_member_struct_user_regs_struct_rsi = yes &&
    test $ac_cv_member_struct_user_regs_struct_rdx = yes )
+AM_CONDITIONAL(WANT_PEEKFD_PPC,
+   test $ac_cv_member_struct_pt_regs_orig_gpr3 = yes &&
+   test $ac_cv_member_struct_pt_regs_gpr = yes )
 
 dnl Check for language stuff
 AM_GNU_GETTEXT([external])
diff --git a/src/Makefile.am b/src/Makefile.am
index 22cb39c..8eb661b 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -10,6 +10,10 @@ if WANT_PEEKFD_X86_64
   bin_PROGRAMS += peekfd
   AM_CFLAGS += -DX86_64
 endif
+if WANT_PEEKFD_PPC
+  bin_PROGRAMS += peekfd
+  AM_CFLAGS += -DPPC
+endif
 
 oldfuser_SOURCES = oldfuser.c comm.h signals.c signals.h loop.h i18n.h
 
diff --git a/src/peekfd.c b/src/peekfd.c
index cfcfb18..9262304 100644
--- a/src/peekfd.c
+++ b/src/peekfd.c
@@ -27,6 +27,8 @@
 #include <sys/types.h>
 #include <sys/wait.h>
 #include <sys/syscall.h>
+#include <byteswap.h>
+#include <endian.h>
 #include <linux/user.h>
 #include <stdlib.h>
 #include <getopt.h>
@@ -46,6 +48,15 @@
 	#define REG_PARAM1 rdi
 	#define REG_PARAM2 rsi
 	#define REG_PARAM3 rdx
+#elif PPC
+	#define REG_ORIG_ACCUM gpr[0]
+	#define REG_ACCUM gpr[3]
+	#define REG_PARAM1 orig_gpr3
+	#define REG_PARAM2 gpr[4]
+	#define REG_PARAM3 gpr[5]
+#ifndef PT_ORIG_R3
+	#define PT_ORIG_R3 34
+#endif
 #endif
 
 #define MAX_ATTACHED_PIDS 1024
@@ -188,9 +199,17 @@ int main(int argc, char **argv)
 		int status;
 		int pid = wait(&status);
 		if (WIFSTOPPED(status)) {
+#ifdef PPC
+			struct pt_regs regs;
+			regs.gpr[0] = ptrace(PTRACE_PEEKUSER, pid, 4 * PT_R0, 0);
+			regs.gpr[3] = ptrace(PTRACE_PEEKUSER, pid, 4 * PT_R3, 0);
+			regs.gpr[4] = ptrace(PTRACE_PEEKUSER, pid, 4 * PT_R4, 0);
+			regs.gpr[5] = ptrace(PTRACE_PEEKUSER, pid, 4 * PT_R5, 0);
+			regs.orig_gpr3 = ptrace(PTRACE_PEEKUSER, pid, 4 * PT_ORIG_R3, 0);
+#else
 			struct user_regs_struct regs;
 			ptrace(PTRACE_GETREGS, pid, 0, &regs);
-		
+#endif		
 			/*unsigned int b = ptrace(PTRACE_PEEKTEXT, pid, regs.eip, 0);*/
 			if (follow_forks && (regs.REG_ORIG_ACCUM == SYS_fork || regs.REG_ORIG_ACCUM == SYS_clone)) {
 				if (regs.REG_ACCUM > 0)
@@ -219,7 +238,11 @@ int main(int argc, char **argv)
 						}
 
 						for (i = 0; i < regs.REG_PARAM3; i++) {
+#ifdef _BIG_ENDIAN
+							unsigned int a = bswap_32(ptrace(PTRACE_PEEKTEXT, pid, regs.REG_PARAM2 + i, 0));
+#else
 							unsigned int a = ptrace(PTRACE_PEEKTEXT, pid, regs.REG_PARAM2 + i, 0);
+#endif
 							if (remove_duplicates)
 								lastbuf[i] = a & 0xff;
 
-- 
2.40.0