[RISU 7/9] Compute reginfo_size based on the reginfo

[Richard Henderson <richard.henderson@linaro.org>]

This will allow dumping of SVE frames without having
to know the SVE vector length beforehand.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 risu.h                 | 2 +-
 reginfo.c              | 7 ++++---
 risu_reginfo_aarch64.c | 4 ++--
 risu_reginfo_arm.c     | 2 +-
 risu_reginfo_i386.c    | 2 +-
 risu_reginfo_m68k.c    | 2 +-
 risu_reginfo_ppc64.c   | 2 +-
 7 files changed, 11 insertions(+), 10 deletions(-)

diff --git a/risu.h b/risu.h
index 3fc198f..0ae7fa9 100644
--- a/risu.h
+++ b/risu.h
@@ -139,6 +139,6 @@ int reginfo_dump(struct reginfo *ri, FILE * f);
 int reginfo_dump_mismatch(struct reginfo *m, struct reginfo *a, FILE *f);
 
 /* return size of reginfo */
-const int reginfo_size(void);
+int reginfo_size(struct reginfo *ri);
 
 #endif /* RISU_H */
diff --git a/reginfo.c b/reginfo.c
index a4f7da6..1727867 100644
--- a/reginfo.c
+++ b/reginfo.c
@@ -40,7 +40,7 @@ int send_register_info(write_fn write_fn, void *uc)
     case OP_TESTEND:
     case OP_COMPARE:
     default:
-        header.size = reginfo_size();
+        header.size = reginfo_size(&ri);
         extra = &ri;
         break;
 
@@ -121,8 +121,9 @@ int recv_and_compare_register_info(read_fn read_fn,
         /* Do a simple register compare on (a) explicit request
          * (b) end of test (c) a non-risuop UNDEF
          */
-        if (header.size != reginfo_size() ||
-            read_fn(&apprentice_ri, header.size)) {
+        if (header.size > sizeof(struct reginfo) ||
+            read_fn(&apprentice_ri, header.size) ||
+            header.size != reginfo_size(&apprentice_ri)) {
             packet_mismatch = 1;
             resp = 2;
         } else if (!reginfo_is_eq(&master_ri, &apprentice_ri)) {
diff --git a/risu_reginfo_aarch64.c b/risu_reginfo_aarch64.c
index 028c690..7044648 100644
--- a/risu_reginfo_aarch64.c
+++ b/risu_reginfo_aarch64.c
@@ -69,7 +69,7 @@ void process_arch_opt(int opt, const char *arg)
 #endif
 }
 
-const int reginfo_size(void)
+int reginfo_size(struct reginfo *ri)
 {
     int size = offsetof(struct reginfo, simd.end);
 #ifdef SVE_MAGIC
@@ -194,7 +194,7 @@ void reginfo_init(struct reginfo *ri, ucontext_t *uc)
 /* reginfo_is_eq: compare the reginfo structs, returns nonzero if equal */
 int reginfo_is_eq(struct reginfo *r1, struct reginfo *r2)
 {
-    return memcmp(r1, r2, reginfo_size()) == 0;
+    return memcmp(r1, r2, reginfo_size(r1)) == 0;
 }
 
 #ifdef SVE_MAGIC
diff --git a/risu_reginfo_arm.c b/risu_reginfo_arm.c
index 3662f12..3832e27 100644
--- a/risu_reginfo_arm.c
+++ b/risu_reginfo_arm.c
@@ -36,7 +36,7 @@ void process_arch_opt(int opt, const char *arg)
     abort();
 }
 
-const int reginfo_size(void)
+int reginfo_size(struct reginfo *ri)
 {
     return sizeof(struct reginfo);
 }
diff --git a/risu_reginfo_i386.c b/risu_reginfo_i386.c
index 60fc239..902d33e 100644
--- a/risu_reginfo_i386.c
+++ b/risu_reginfo_i386.c
@@ -74,7 +74,7 @@ void process_arch_opt(int opt, const char *arg)
     }
 }
 
-const int reginfo_size(void)
+int reginfo_size(struct reginfo *ri)
 {
     return sizeof(struct reginfo);
 }
diff --git a/risu_reginfo_m68k.c b/risu_reginfo_m68k.c
index 32b28c8..361f172 100644
--- a/risu_reginfo_m68k.c
+++ b/risu_reginfo_m68k.c
@@ -23,7 +23,7 @@ void process_arch_opt(int opt, const char *arg)
     abort();
 }
 
-const int reginfo_size(void)
+int reginfo_size(struct reginfo *ri)
 {
     return sizeof(struct reginfo);
 }
diff --git a/risu_reginfo_ppc64.c b/risu_reginfo_ppc64.c
index 071c951..c86313c 100644
--- a/risu_reginfo_ppc64.c
+++ b/risu_reginfo_ppc64.c
@@ -32,7 +32,7 @@ void process_arch_opt(int opt, const char *arg)
     abort();
 }
 
-const int reginfo_size(void)
+int reginfo_size(struct reginfo *ri)
 {
     return sizeof(struct reginfo);
 }
-- 
2.20.1