This is a precursor to record/playback support. Instead of passing the
socket fd we now pass helper functions for reading/writing and
responding. This will allow us to do the rest of the record/playback
cleanly outside of the main worker function.
Signed-off-by: Alex Bennée <alex.ben...@linaro.org>
---
v6
- restore OP_TESTEND to return write_fn()
- clean up wording on helper function prototypes
v5
- re-base without tab/format cleanps
v4
- split header code
- fix formatting foo-bar's
v3
- new for v3
- arm, aarch64, ppc64
---
reginfo.c | 38 ++++++++++++++++++--------------------
risu.c | 23 +++++++++++++++++++++--
risu.h | 14 ++++++++++++--
3 files changed, 51 insertions(+), 24 deletions(-)
diff --git a/reginfo.c b/reginfo.c
index 31bb99f..b69d11f 100644
--- a/reginfo.c
+++ b/reginfo.c
@@ -21,7 +21,7 @@ uint8_t apprentice_memblock[MEMBLOCKLEN];
static int mem_used;
static int packet_mismatch;
-int send_register_info(int sock, void *uc)
+int send_register_info(write_fn write_fn, void *uc)
{
struct reginfo ri;
int op;
@@ -29,24 +29,24 @@ int send_register_info(int sock, void *uc)
op = get_risuop(&ri);
switch (op) {
- case OP_COMPARE:
case OP_TESTEND:
- default:
- /* Do a simple register compare on (a) explicit request
- * (b) end of test (c) a non-risuop UNDEF
- */
- return send_data_pkt(sock, &ri, sizeof(ri));
+ return write_fn(&ri, sizeof(ri));
case OP_SETMEMBLOCK:
- memblock = (void *) (uintptr_t) get_reginfo_paramreg(&ri);
+ memblock = (void *)(uintptr_t)get_reginfo_paramreg(&ri);
break;
case OP_GETMEMBLOCK:
set_ucontext_paramreg(uc,
- get_reginfo_paramreg(&ri) +
- (uintptr_t) memblock);
+ get_reginfo_paramreg(&ri) + (uintptr_t)memblock);
break;
case OP_COMPAREMEM:
- return send_data_pkt(sock, memblock, MEMBLOCKLEN);
+ return write_fn(memblock, MEMBLOCKLEN);
break;
+ case OP_COMPARE:
+ default:
+ /* Do a simple register compare on (a) explicit request
+ * (b) end of test (c) a non-risuop UNDEF
+ */
+ return write_fn(&ri, sizeof(ri));
}
return 0;
}
@@ -59,7 +59,7 @@ int send_register_info(int sock, void *uc)
* that says whether it is register or memory data, so if the two
* sides get out of sync then we will fail obscurely.
*/
-int recv_and_compare_register_info(int sock, void *uc)
+int recv_and_compare_register_info(read_fn read_fn, respond_fn resp_fn, void
*uc)
{
int resp = 0, op;
@@ -73,36 +73,34 @@ int recv_and_compare_register_info(int sock, void *uc)
/* Do a simple register compare on (a) explicit request
* (b) end of test (c) a non-risuop UNDEF
*/
- if (recv_data_pkt(sock, &apprentice_ri, sizeof(apprentice_ri))) {
+ if (read_fn(&apprentice_ri, sizeof(apprentice_ri))) {
packet_mismatch = 1;
resp = 2;
-
} else if (!reginfo_is_eq(&master_ri, &apprentice_ri)) {
/* register mismatch */
resp = 2;
-
} else if (op == OP_TESTEND) {
resp = 1;
}
- send_response_byte(sock, resp);
+ resp_fn(resp);
break;
case OP_SETMEMBLOCK:
- memblock = (void *) (uintptr_t) get_reginfo_paramreg(&master_ri);
+ memblock = (void *)(uintptr_t)get_reginfo_paramreg(&master_ri);
break;
case OP_GETMEMBLOCK:
set_ucontext_paramreg(uc, get_reginfo_paramreg(&master_ri) +
- (uintptr_t) memblock);
+ (uintptr_t)memblock);
break;
case OP_COMPAREMEM:
mem_used = 1;
- if (recv_data_pkt(sock, apprentice_memblock, MEMBLOCKLEN)) {
+ if (read_fn(apprentice_memblock, MEMBLOCKLEN)) {
packet_mismatch = 1;
resp = 2;
} else if (memcmp(memblock, apprentice_memblock, MEMBLOCKLEN) != 0) {
/* memory mismatch */
resp = 2;
}
- send_response_byte(sock, resp);
+ resp_fn(resp);
break;
}
diff --git a/risu.c b/risu.c
index a10422a..88e586c 100644
--- a/risu.c
+++ b/risu.c
@@ -37,9 +37,28 @@ sigjmp_buf jmpbuf;
/* Should we test for FP exception status bits? */
int test_fp_exc;
+/* Master functions */
+
+int read_sock(void *ptr, size_t bytes)
+{
+ return recv_data_pkt(master_socket, ptr, bytes);
+}
+
+void respond_sock(int r)
+{
+ send_response_byte(master_socket, r);
+}
+
+/* Apprentice function */
+
+int write_sock(void *ptr, size_t bytes)
+{
+ return send_data_pkt(apprentice_socket, ptr, bytes);
+}
+
void master_sigill(int sig, siginfo_t *si, void *uc)
{
- switch (recv_and_compare_register_info(master_socket, uc)) {
+ switch (recv_and_compare_register_info(read_sock, respond_sock, uc)) {
case 0:
/* match OK */
advance_pc(uc);
@@ -52,7 +71,7 @@ void master_sigill(int sig, siginfo_t *si, void *uc)
void apprentice_sigill(int sig, siginfo_t *si, void *uc)
{
- switch (send_register_info(apprentice_socket, uc)) {
+ switch (send_register_info(write_sock, uc)) {
case 0:
/* match OK */
advance_pc(uc);
diff --git a/risu.h b/risu.h
index 3fbeda8..20bb824 100644
--- a/risu.h
+++ b/risu.h
@@ -52,17 +52,27 @@ struct reginfo;
/* Functions operating on reginfo */
+/* Function prototypes for read/write helper functions.
+ *
+ * We pass the helper function to send_register_info and
+ * recv_and_compare_register_info which can either be backed by the
+ * traditional network socket or a trace file.
+ */
+typedef int (*write_fn) (void *ptr, size_t bytes);
+typedef int (*read_fn) (void *ptr, size_t bytes);
+typedef void (*respond_fn) (int response);
+
/* Send the register information from the struct ucontext down the socket.
* Return the response code from the master.
* NB: called from a signal handler.
*/
-int send_register_info(int sock, void *uc);
+int send_register_info(write_fn write_fn, void *uc);
/* Read register info from the socket and compare it with that from the
* ucontext. Return 0 for match, 1 for end-of-test, 2 for mismatch.
* NB: called from a signal handler.
*/
-int recv_and_compare_register_info(int sock, void *uc);
+int recv_and_compare_register_info(read_fn read_fn, respond_fn respond, void
*uc);
/* Print a useful report on the status of the last comparison
* done in recv_and_compare_register_info(). This is called on
--
2.13.0
