Le 27/03/2023 à 18:24, Philippe Mathieu-Daudé a écrit :
Per the release 6.06 revision history:

  5.03 August 21, 2013

  • ABS2008 and NAN2008 fields of Table 5.7 “FCSR RegisterField
    Descriptions” were optional in release 3 and could be R/W,
    but as of release 5 are required, read-only, and preset by
    hardware.

The P5600 core implements the release 5, and has the ABS2008
and NAN2008 bits set in CP1_fcr31. Therefore it is able to run
ELF binaries compiled with EF_MIPS_NAN2008, such the CIP United
Debian NaN2008 distribution:
http://repo.oss.cipunited.com/mipsel-nan2008/README.txt

In order to run such compiled binaries, select by default the
P5600 core when the ELF 'MIPS_NAN2008' flag is set.

Reported-by: Jiaxun Yang <[email protected]>
Signed-off-by: Philippe Mathieu-Daudé <[email protected]>
---
  linux-user/mips/target_elf.h | 3 +++
  1 file changed, 3 insertions(+)

diff --git a/linux-user/mips/target_elf.h b/linux-user/mips/target_elf.h
index a98c9bd6ad..b965e86b2b 100644
--- a/linux-user/mips/target_elf.h
+++ b/linux-user/mips/target_elf.h
@@ -15,6 +15,9 @@ static inline const char *cpu_get_model(uint32_t eflags)
      if ((eflags & EF_MIPS_MACH) == EF_MIPS_MACH_5900) {
          return "R5900";
      }
+    if (eflags & EF_MIPS_NAN2008) {
+        return "P5600";
+    }
      return "24Kf";
  }
  #endif

Acked-by: Laurent Vivier <[email protected]>

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