[v3] The m68k gdbstub SR reg request doesnt include Condition-Codes

[Qemu-devel] [PATCH v3] The m68k gdbstub SR reg request doesnt include Condition-Codes

Lucien Murray-Pitts posted 1 patch 5 years, 6 months ago

Diff against v1 v2
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git fetch https://github.com/patchew-project/qemu tags/patchew/20190609105154.GA16755@localhost.localdomain

Maintainers: Laurent Vivier <laurent@vivier.eu>

target/m68k/gdbstub.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

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[Qemu-devel] [PATCH v3] The m68k gdbstub SR reg request doesnt include Condition-Codes

Posted by Lucien Murray-Pitts 5 years, 6 months ago

The register request via gdbstub would return the SR part
which contains the Trace/Master/IRQ state flags, but
would be missing the CR (Condition Register) state bits.

This fix adds this support by merging them in the m68k
specific gdbstub handler m68k_cpu_gdb_read_register for SR register.

Signed-off-by: Lucien Murray-Pitts <lucienmp.qemu@gmail.com>
---

Notes:
    v1->v2
       - removed my superfluous braces
       - slightly amended the commit message
    
    v2->v3
       - removed my incorrect use of code block in a switch

 target/m68k/gdbstub.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/target/m68k/gdbstub.c b/target/m68k/gdbstub.c
index fd2bb46c42..6e7f3b8980 100644
--- a/target/m68k/gdbstub.c
+++ b/target/m68k/gdbstub.c
@@ -36,7 +36,8 @@ int m68k_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n)
     } else {
         switch (n) {
         case 16:
-            return gdb_get_reg32(mem_buf, env->sr);
+            /* SR is made of SR+CCR, CCR is many 1bit flags so uses helper */
+            return gdb_get_reg32(mem_buf, env->sr | cpu_m68k_get_ccr(env));
         case 17:
             return gdb_get_reg32(mem_buf, env->pc);
         }
-- 
2.21.0

Re: [Qemu-devel] [PATCH v3] The m68k gdbstub SR reg request doesnt include Condition-Codes

Posted by Laurent Vivier 5 years, 6 months ago

Le 09/06/2019 à 12:51, Lucien Murray-Pitts a écrit :
> The register request via gdbstub would return the SR part
> which contains the Trace/Master/IRQ state flags, but
> would be missing the CR (Condition Register) state bits.
> 
> This fix adds this support by merging them in the m68k
> specific gdbstub handler m68k_cpu_gdb_read_register for SR register.
> 
> Signed-off-by: Lucien Murray-Pitts <lucienmp.qemu@gmail.com>
> ---
> 
> Notes:
>     v1->v2
>        - removed my superfluous braces
>        - slightly amended the commit message
>     
>     v2->v3
>        - removed my incorrect use of code block in a switch
> 
>  target/m68k/gdbstub.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/target/m68k/gdbstub.c b/target/m68k/gdbstub.c
> index fd2bb46c42..6e7f3b8980 100644
> --- a/target/m68k/gdbstub.c
> +++ b/target/m68k/gdbstub.c
> @@ -36,7 +36,8 @@ int m68k_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n)
>      } else {
>          switch (n) {
>          case 16:
> -            return gdb_get_reg32(mem_buf, env->sr);
> +            /* SR is made of SR+CCR, CCR is many 1bit flags so uses helper */
> +            return gdb_get_reg32(mem_buf, env->sr | cpu_m68k_get_ccr(env));
>          case 17:
>              return gdb_get_reg32(mem_buf, env->pc);
>          }
> 

Reviewed-by: Laurent Vivier <laurent@vivier.eu>