Le 16/07/2018 à 13:10, Aleksandar Markovic a écrit : > Hello, all. > > > Just a little background: > > > One of the fields in an ELF header is e_machine. It is meant to contain > "machine architecture". The numerical value is approved by a committee. > Some values for common targets are: EM_PPC, EM_PPC64, EM_ARM, > EM_AARCH64, etc. > > > The TCG function tcg_register_jit_int() expects that the preprocessor > constant ELF_HOST_MACHINE is defined, and uses internally the value of > that constant. > > > Consider, let's say, ARM: It definesELF_HOST_MACHINE in > tcg/arm/tcg-target.inc.c as > > > #define ELF_HOST_MACHINE EM_ARM > > > while in tcg/aarch64/tcg-target.inc.c it defines it as > > > #define ELF_HOST_MACHINE EM_AARCH64 > > > For MIPS, the situation is different: Up until recently, MIPS had only > one value for e_machine: that was EM_MIPS (used for both 32-bit and > 64-bit MIPS systems). However, new nanoMIPS systems have a new value in > that field: EM_NANOMIPS (that is to be applied for both 32-bit and > 64-bit nanoMIPS systems). > > > The situation described above represent a problem for us developing > nanoMIPS support, forcing us to have different compilations (and > executables) for MIPS and nanoMIPS. > > > Is there a possibility to refactor tcg_register_jit_int() to receive > "e_machine" value as an argument, instead of expecting preprocessor > constant to be set?
I don't know this par of code, but for PPC we have: #if TCG_TARGET_REG_BITS == 64 # define ELF_HOST_MACHINE EM_PPC64 #else # define ELF_HOST_MACHINE EM_PPC #endif So perhaps you could have something like: #if defined(HOST_NANOMIPS) # define ELF_HOST_MACHINE EM_NANOMIPS #else # define ELF_HOST_MACHINE EM_MIPS #endif Thanks, Laurent
