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[v2,13/17] gdbstub: Introduce gdb_get_float32() to get 32-bit float registers

Message ID 20200414200631.12799-14-alex.bennee@linaro.org
State New
Headers show
Series more randome fixes (user, pie, docker and gdbstub) | expand

Commit Message

Alex Bennée April 14, 2020, 8:06 p.m. UTC
From: Philippe Mathieu-Daudé <philmd@redhat.com>

Since we now use a GByteArray, we can not use stfl_p() directly.
Introduce the gdb_get_float32() helper to load a float32 register.

Fixes: a010bdbe719 ("extend GByteArray to read register helpers")
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20200414163853.12164-2-philmd@redhat.com>
---
 include/exec/gdbstub.h | 9 +++++++++
 target/sh4/gdbstub.c   | 6 ++----
 2 files changed, 11 insertions(+), 4 deletions(-)

Comments

Richard Henderson April 14, 2020, 9:20 p.m. UTC | #1
On 4/14/20 1:06 PM, Alex Bennée wrote:
> From: Philippe Mathieu-Daudé <philmd@redhat.com>
> 
> Since we now use a GByteArray, we can not use stfl_p() directly.
> Introduce the gdb_get_float32() helper to load a float32 register.
> 
> Fixes: a010bdbe719 ("extend GByteArray to read register helpers")
> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
> Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
> Message-Id: <20200414163853.12164-2-philmd@redhat.com>
> ---
>  include/exec/gdbstub.h | 9 +++++++++
>  target/sh4/gdbstub.c   | 6 ++----
>  2 files changed, 11 insertions(+), 4 deletions(-)

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>


r~
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Patch

diff --git a/include/exec/gdbstub.h b/include/exec/gdbstub.h
index 3c452fc50c0..20e10726929 100644
--- a/include/exec/gdbstub.h
+++ b/include/exec/gdbstub.h
@@ -125,6 +125,15 @@  static inline int gdb_get_reg128(GByteArray *buf, uint64_t val_hi,
     return 16;
 }
 
+static inline int gdb_get_float32(GByteArray *array, float32 val)
+{
+    uint8_t buf[sizeof(CPU_FloatU)];
+
+    stfl_p(buf, val);
+    g_byte_array_append(array, buf, sizeof(buf));
+
+    return sizeof(buf);
+}
 static inline int gdb_get_zeroes(GByteArray *array, size_t len)
 {
     guint oldlen = array->len;
diff --git a/target/sh4/gdbstub.c b/target/sh4/gdbstub.c
index 49fc4a0cc69..34ad3ca0508 100644
--- a/target/sh4/gdbstub.c
+++ b/target/sh4/gdbstub.c
@@ -58,11 +58,9 @@  int superh_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n)
         return gdb_get_regl(mem_buf, env->fpscr);
     case 25 ... 40:
         if (env->fpscr & FPSCR_FR) {
-            stfl_p(mem_buf, env->fregs[n - 9]);
-        } else {
-            stfl_p(mem_buf, env->fregs[n - 25]);
+            return gdb_get_float32(mem_buf, env->fregs[n - 9]);
         }
-        return 4;
+        return gdb_get_float32(mem_buf, env->fregs[n - 25]);
     case 41:
         return gdb_get_regl(mem_buf, env->ssr);
     case 42: