[Pdbg] [PATCH 08/10] pdbg: Add getcr and putcr options

[Rashmica Gupta]

Signed-off-by: Rashmica Gupta <rashmica.g at gmail.com>
---
 src/main.c |  2 ++
 src/reg.c  | 34 ++++++++++++++++++++++++++++++++++
 src/reg.h  |  1 +
 3 files changed, 37 insertions(+)

diff --git a/src/main.c b/src/main.c
index 90fb729..e714377 100644
--- a/src/main.c
+++ b/src/main.c
@@ -96,6 +96,8 @@ static struct action expert_actions[] = {
 	{ "putspr",  "<spr> <value>", "Write Special Purpose Register (SPR)", &handle_spr },
 	{ "getmsr",  "", "Get Machine State Register (MSR)", &handle_msr },
 	{ "putmsr",  "<value>", "Write Machine State Register (MSR)", &handle_msr },
+	{ "getcr",  "", "Get Condition Register (CR)", &handle_cr },
+	{ "putcr",  "<value>", "Write Condition Register (CR)", &handle_cr },
 	{ "getxer",  "", "Get Fixed Point Exception Register (XER)", &handle_xer },
 	{ "putxer",  "<value>", "Write Fixed Point Exception Register (XER)", &handle_xer },
 	{ "getring", "<addr> <len>", "Read a ring. Length must be correct", &handle_getring },
diff --git a/src/reg.c b/src/reg.c
index e252ab8..0a87006 100644
--- a/src/reg.c
+++ b/src/reg.c
@@ -24,6 +24,7 @@
 
 #include "main.h"
 
+#define REG_CR -5
 #define REG_XER -4
 #define REG_MEM -3
 #define REG_MSR -2
@@ -45,6 +46,8 @@ static void print_proc_reg(struct pdbg_target *target, uint64_t reg, uint64_t va
 		printf("nia: ");
 	else if (reg == REG_XER)
 		printf("xer: ");
+	else if (reg == REG_CR)
+		printf("cr: ");
 	else if (reg > REG_R31)
 		printf("spr%03" PRIu64 ": ", reg - REG_R31);
 	else if (reg >= 0 && reg <= 31)
@@ -68,6 +71,8 @@ static int putprocreg(struct pdbg_target *target, uint32_t index, uint64_t *reg,
 		rc = ram_putnia(target, *value);
 	else if (*reg == REG_XER)
 		rc = ram_putxer(target, *value);
+	else if (*reg == REG_CR)
+		rc = ram_putcr(target, *value);
 	else if (*reg > REG_R31)
 		rc = ram_putspr(target, *reg - REG_R31, *value);
 	else if (*reg >= 0 && *reg <= 31)
@@ -89,6 +94,8 @@ static int getprocreg(struct pdbg_target *target, uint32_t index, uint64_t *reg,
 		rc = ram_getnia(target, &value);
 	else if (*reg == REG_XER)
 		rc = ram_getxer(target, &value);
+	else if (*reg == REG_CR)
+		rc = ram_getcr(target, &value);
 	else if (*reg > REG_R31)
 		rc = ram_getspr(target, *reg - REG_R31, &value);
 	else if (*reg >= 0 && *reg <= 31)
@@ -268,3 +275,30 @@ int handle_xer(int optind, int argc, char *argv[])
 	PR_WARNING("We can only get part of the XER register.\n");
 	return for_each_target("thread", getprocreg, &xer, NULL);
 }
+
+int handle_cr(int optind, int argc, char *argv[])
+{
+	uint64_t cr = REG_CR;
+	char *endptr;
+
+	if (strcmp(argv[optind], "putcr") == 0) {
+		uint64_t data;
+
+		if (optind + 1 >= argc) {
+			printf("%s: command '%s' requires data\n", argv[0], argv[optind]);
+			return -1;
+		}
+
+		errno = 0;
+		data = strtoull(argv[optind + 1], &endptr, 0);
+		if (errno || *endptr != '\0') {
+			printf("%s: command '%s' couldn't parse data '%s'\n",
+				argv[0], argv[optind], argv[optind + 1]);
+			return -1;
+		}
+
+		return for_each_target("thread", putprocreg, &cr, &data);
+	}
+
+	return for_each_target("thread", getprocreg, &cr, NULL);
+}
diff --git a/src/reg.h b/src/reg.h
index ca548a6..96d3f73 100644
--- a/src/reg.h
+++ b/src/reg.h
@@ -19,3 +19,4 @@ int handle_nia(int optind, int argc, char *argv[]);
 int handle_spr(int optind, int argc, char *argv[]);
 int handle_msr(int optind, int argc, char *argv[]);
 int handle_xer(int optind, int argc, char *argv[]);
+int handle_cr(int optind, int argc, char *argv[]);
-- 
2.14.3