[Valgrind-users] Compiling Valgrind with mips-linux-muslsf-gcc

[Yannik M. <yma...@me...>]

Hey all,

I am currently attempting to compile valgrind with 
mips-linux-muslsf-gcc, but it errors out because guest_mips_helpers.c 
uses floating point registers, which are not available in the softfloat 
target. Any help would be appreciated.

The steps below can be used to reproduce this:

1. wget https://musl.cc/mips-linux-muslsf-cross.tgz
2. tar -xzf mips-linux-muslsf-cross.tgz
3. export PATH=$PATH:$(pwd)/mips-linux-muslsf-cross/bin
4. git clone https://sourceware.org/git/valgrind.git
5. cd valgrind
6. ./autogen.sh
7. ./configure --host=mips-linux-muslsf
8. make

Below are the first few errors that I am seeing:

priv/guest_mips_helpers.c: In function 
‘mips_dirtyhelper_calculate_FCSR_fp32’:
priv/guest_mips_helpers.c:501:4: error: the register ‘$f21’ cannot be 
clobbered in ‘asm’ for the current target
   501 |    __asm__ volatile(".set  push"        "\n\t" 
     \
       |    ^~~~~~~
priv/guest_mips_helpers.c:644:10: note: in expansion of macro 
‘ASM_VOLATILE_UNARY32_DOUBLE’
   644 |          ASM_VOLATILE_UNARY32_DOUBLE(round.w.d)
       |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~
priv/guest_mips_helpers.c:486:4: error: the register ‘$f20’ cannot be 
clobbered in ‘asm’ for the current target
   486 |    __asm__ volatile(".set  push"        "\n\t" 
     \
       |    ^~~~~~~
priv/guest_mips_helpers.c:647:10: note: in expansion of macro 
‘ASM_VOLATILE_UNARY32’
   647 |          ASM_VOLATILE_UNARY32(floor.w.s)
       |

Best regards,
Yannik Marchand