Fomit frame pointer gentoo

-fomit-frame-pointer allows one extra register to be available for general-purpose use. I would assume this is really only a big deal on bit x86, which is a bit starved for registers.* One would expect to see EBP no longer saved and adjusted on every function call, and probably some additional use of EBP in normal code, and fewer stack operations on occasions where EBP gets used as a. -fomit-frame-pointer in CFLAGS/CXXFLAGS. you’ll get into troubles! And this is not specific to Gentoo and probably not to specific kernel version, because there are reports from and before ! So if you have the following error. Mar 09,  · This has to do with x Without -fomit-frame-pointer parameters and local variables are accessed via the frame pointer %ebp. With frame-pointer-ommision %ebp is used for whatever suits and parameters/local vars are accessed via the stack pointer %esp. Now, for some oddity I'll leave out, memory accesses via %esp are one byte longer than via %ebp.

Fomit frame pointer gentoo

May 10,  · -fomit-frame-pointer Don't keep the frame pointer in a register for functions that don't need one. This avoids the instructions to save, set up and restore frame pointers; it also makes an extra register available in many functions. It also makes debugging impossible on some machines. Jun 15,  · The software was Gentoo Linux using the Universal ISOs. I performed a stage 3 installation with no USE flags, the compiler options set for -pipe -O2 -fomit-frame-pointer, and the Pentium 4 and K8 -march options. I used the Pentium 4 option with the Athlon 64 because it has the same technologies (SSE, SSE2, MMX) that the Pentium 4 option. Mar 09,  · This has to do with x Without -fomit-frame-pointer parameters and local variables are accessed via the frame pointer %ebp. With frame-pointer-ommision %ebp is used for whatever suits and parameters/local vars are accessed via the stack pointer %esp. Now, for some oddity I'll leave out, memory accesses via %esp are one byte longer than via %ebp.

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