package/devel/valgrind/patches/130-mips_fix_soft_float.patch

   1 Disable the valgrind helpers which use MIPS floating point operations
   2 when floating point support is deactivated in the toolchain.
   3
   4 The fix from this commit is not sufficient any more:
   5 https://sourceware.org/git/?p=valgrind.git;a=commitdiff;h=869fcf2f6739f17b4eff36ec68f8dca826c8afeb
   6
   7 This fixes the following error message when compiling with a GCC 10 MIPS BE 32:
   8 ---------------------------------------------------------
   9 ../VEX/priv/guest_mips_helpers.c: In function 'mips_dirtyhelper_calculate_FCSR_fp32':
  10 ../VEX/priv/guest_mips_helpers.c:640:10: error: the register '$f21' cannot be clobbered in 'asm' for the current target
  11   640 |          ASM_VOLATILE_UNARY32_DOUBLE(round.w.d)
  12       |          ^
  13 ---------------------------------------------------------
  14
  15 --- a/VEX/priv/guest_mips_helpers.c
  16 +++ b/VEX/priv/guest_mips_helpers.c
  17 @@ -617,6 +617,7 @@ extern UInt mips_dirtyhelper_calculate_F
  18                                                     flt_op inst )
  19  {
  20     UInt ret = 0;
  21 +#ifndef __mips_soft_float
  22  #if defined(__mips__)
  23     VexGuestMIPS32State* guest_state = (VexGuestMIPS32State*)gs;
  24     UInt loFsVal, hiFsVal, loFtVal, hiFtVal;
  25 @@ -699,6 +700,7 @@ extern UInt mips_dirtyhelper_calculate_F
  26           break;
  27     }
  28  #endif
  29 +#endif
  30     return ret;
  31  }
  32
  33 @@ -708,6 +710,7 @@ extern UInt mips_dirtyhelper_calculate_F
  34                                                     flt_op inst )
  35  {
  36     UInt ret = 0;
  37 +#ifndef __mips_soft_float
  38  #if defined(__mips__) && ((__mips == 64) ||                                  \
  39                            (defined(__mips_isa_rev) && (__mips_isa_rev >= 2)))
  40  #if defined(VGA_mips32)
  41 @@ -860,6 +863,7 @@ extern UInt mips_dirtyhelper_calculate_F
  42           break;
  43     }
  44  #endif
  45 +#endif
  46     return ret;
  47  }
  48
  49 --- a/coregrind/m_machine.c
  50 +++ b/coregrind/m_machine.c
  51 @@ -1828,6 +1828,7 @@ Bool VG_(machine_get_hwcaps)( void )
  52             we are using alternative way to determine FP mode */
  53          ULong result = 0;
  54
  55 +#ifndef __mips_soft_float
  56          if (!VG_MINIMAL_SETJMP(env_unsup_insn)) {
  57             __asm__ volatile (
  58                ".set push\n\t"
  59 @@ -1845,6 +1846,9 @@ Bool VG_(machine_get_hwcaps)( void )
  60
  61             fpmode = (result != 0x3FF0000000000000ull);
  62          }
  63 +#else
  64 +       fpmode = 0;
  65 +#endif
  66       }
  67
  68       if (fpmode != 0)