procd: trace: Define syscall registers for powerpc platform

According to manpage the syscall nr is stored in r0
and return value in r3 for powerpc. Define it so we
can use seccomp and utrace on powerpc.

Signed-off-by: Wojciech Dubowik <Wojciech.Dubowik@neratec.com>

diff --git a/jail/seccomp-bpf.h b/jail/seccomp-bpf.h
index fc3ffe75f295da510f81bd0e51acc4c28759a823..fd6b3e257c385c4e3b03ccb9ed89fe67fec70ff4 100644 (file)
--- a/jail/seccomp-bpf.h
+++ b/jail/seccomp-bpf.h
@@ -81,6 +81,9 @@ struct seccomp_data {
 # else
 #  define ARCH_NR      AUDIT_ARCH_ARMEB
 # endif
+#elif defined(__PPC__)
+# define REG_SYSCALL   regs.gpr[0]
+# define ARCH_NR       AUDIT_ARCH_PPC
 #else
 # warning "Platform does not support seccomp filter yet"
 # define REG_SYSCALL   0

diff --git a/trace/trace.c b/trace/trace.c
index 665c22ef814a5f98939816d964ba38de60116494..78b99dd053d7b91bd86ac9d7efc7a706596e0caa 100644 (file)
--- a/trace/trace.c
+++ b/trace/trace.c
@@ -58,6 +58,9 @@
 # if defined(__ARM_EABI__)
 # define reg_retval_nr _offsetof(struct user, regs.uregs[0])
 # endif
+#elif defined(__PPC__)
+#define reg_syscall_nr _offsetof(struct user, regs.gpr[0])
+#define reg_retval_nr  _offsetof(struct user, regs.gpr[3])
 #else
 #error tracing is not supported on this architecture
 #endif