path: root/crt/arm
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authorRich Felker <>2015-11-09 21:14:07 -0500
committerRich Felker <>2015-11-09 21:14:07 -0500
commitcf40375e8fd14fc02a850af90b145d324d0381b5 (patch)
treebb37e26c9b2ca9b2b969cad83303424de3507ef6 /crt/arm
parentea1e2c5e18dd0790fb9b2af2bd947f4981736dc2 (diff)
use vfp mnemonics rather than hard-coded opcodes in arm setjmp/longjmp
the code to save/restore vfp registers needs to build even when the configured target does not have fpu; this is because code using vfp fpu (but with the standard soft-float EABI) may call a libc built for a soft-float only, and the EABI considers these registers call-saved when they exist. thus, extra directives are used to force the assembler to allow vfp instructions and to avoid marking the resulting object files as requiring vfp. moving away from using hard-coded opcode words is necessary in order to eventually support producing thumb2-only output for cortex-m. conditional execution of these instructions based on hwcap flags was already implemented. when building for arm (non-thumb) output, the only currently-supported configuration, this commit does not change the code emitted.
Diffstat (limited to 'crt/arm')
0 files changed, 0 insertions, 0 deletions