[Pdbg] [PATCH 05/19] libpdbg: Make getcr actually get all of the Condition Register

[Rashmica Gupta]

Signed-off-by: Rashmica Gupta <rashmica.g at gmail.com>
---
 libpdbg/chip.c    | 27 +++++++++++++++++----------
 libpdbg/libpdbg.h |  1 +
 2 files changed, 18 insertions(+), 10 deletions(-)

diff --git a/libpdbg/chip.c b/libpdbg/chip.c
index 01c9b58..31c8c80 100644
--- a/libpdbg/chip.c
+++ b/libpdbg/chip.c
@@ -281,13 +281,25 @@ int ram_getmsr(struct pdbg_target *thread, uint64_t *value)
 	return 0;
 }
 
-int ram_getcr(struct pdbg_target *thread, int cr, uint64_t *value)
+int ram_getcr(struct pdbg_target *thread, uint32_t *value)
 {
-	uint64_t opcodes[] = {mfocrf(0, cr), mtspr(277, 0)};
-	uint64_t results[] = {0, 0};
+
+	uint64_t opcodes[] = {mfocrf(0, 0), mtspr(277, 0), mfocrf(0, 1), mtspr(277, 0),
+			      mfocrf(0, 2), mtspr(277, 0), mfocrf(0, 3), mtspr(277, 0),
+			      mfocrf(0, 4), mtspr(277, 0), mfocrf(0, 5), mtspr(277, 0),
+			      mfocrf(0, 6), mtspr(277, 0), mfocrf(0, 7), mtspr(277, 0)};
+	uint64_t results[16] = {0};
+	uint32_t cr_field, cr = 0;
+	int i;
 
 	CHECK_ERR(ram_instructions(thread, opcodes, results, ARRAY_SIZE(opcodes), 0));
-	*value = results[1];
+	for (i = 1; i < 16; i += 2) {
+		cr_field = results[i];
+		/* We are not guaranteed that the other bits will be zeroed out */
+		cr |= cr_field & (0xf << 2*(i-1));
+	}
+
+	*value = cr;
 	return 0;
 }
 
@@ -386,12 +398,7 @@ int ram_state_thread(struct pdbg_target *thread, struct thread_regs *regs)
 	ram_getspr(thread, 815, &regs->tar);
 	printf("TAR   : 0x%016" PRIx64 "\n", regs->tar);
 
-	regs->cr = 0;
-	for (i = 0; i < 8; i++) {
-		uint64_t cr = 0;
-		ram_getcr(thread, i, &cr);
-		regs->cr |= cr;
-	}
+	ram_getcr(thread, &regs->cr);
 	printf("CR    : 0x%08" PRIx32 "\n", regs->cr);
 
 	ram_getxer(thread, &regs->xer);
diff --git a/libpdbg/libpdbg.h b/libpdbg/libpdbg.h
index 2e55060..1239bba 100644
--- a/libpdbg/libpdbg.h
+++ b/libpdbg/libpdbg.h
@@ -142,6 +142,7 @@ int ram_putnia(struct pdbg_target *target, uint64_t val);
 int ram_putspr(struct pdbg_target *target, int spr, uint64_t val);
 int ram_putgpr(struct pdbg_target *target, int spr, uint64_t val);
 int ram_getmsr(struct pdbg_target *target, uint64_t *val);
+int ram_getcr(struct pdbg_target *thread,  uint32_t *value);
 int ram_getnia(struct pdbg_target *target, uint64_t *val);
 int ram_getspr(struct pdbg_target *target, int spr, uint64_t *val);
 int ram_getgpr(struct pdbg_target *target, int gpr, uint64_t *val);
-- 
2.14.4