gcc/libgcc/config/riscv/t-elf

LIB2ADD += $(srcdir)/config/riscv/save-restore.S \
	   $(srcdir)/config/riscv/muldi3.S \
	   $(srcdir)/config/riscv/multi3.c \
	   $(srcdir)/config/riscv/div.S \
	   $(srcdir)/config/riscv/atomic.c \

# Avoid the full unwinder being pulled along with the division libcalls.
LIB2_DIVMOD_EXCEPTION_FLAGS := -fasynchronous-unwind-tables
RISC-V Port: libgcc libgcc/ChangeLog: 2017-02-06 Palmer Dabbelt <palmer@dabbelt.com> * config.host: Add RISC-V tuples. * config/riscv/atomic.c: New file. * config/riscv/crti.S: Likewise. * config/riscv/crtn.S: Likewise. * config/riscv/div.S: Likewise. * config/riscv/linux-unwind.h: Likewise. * config/riscv/muldi3.S: Likewise. * config/riscv/multi3.S: Likewise. * config/riscv/save-restore.S: Likewise. * config/riscv/sfp-machine.h: Likewise. * config/riscv/t-elf: Likewise. * config/riscv/t-elf32: Likewise. * config/riscv/t-elf64: Likewise. * config/riscv/t-softfp32: Likewise. * config/riscv/t-softfp64: Likewise. From-SVN: r245226 2017-02-06 22:38:51 +01:00			`LIB2ADD += $(srcdir)/config/riscv/save-restore.S \`
			`$(srcdir)/config/riscv/muldi3.S \`
Use C version of multi3 for RVE support. libgcc/ * config/riscv/t-elf: Use multi3.c instead of multi3.S. * config/riscv/multi3.c: New file. * config/riscv/multi3.S: Remove. From-SVN: r255598 2017-12-13 07:25:06 +01:00			`$(srcdir)/config/riscv/multi3.c \`
RISC-V Port: libgcc libgcc/ChangeLog: 2017-02-06 Palmer Dabbelt <palmer@dabbelt.com> * config.host: Add RISC-V tuples. * config/riscv/atomic.c: New file. * config/riscv/crti.S: Likewise. * config/riscv/crtn.S: Likewise. * config/riscv/div.S: Likewise. * config/riscv/linux-unwind.h: Likewise. * config/riscv/muldi3.S: Likewise. * config/riscv/multi3.S: Likewise. * config/riscv/save-restore.S: Likewise. * config/riscv/sfp-machine.h: Likewise. * config/riscv/t-elf: Likewise. * config/riscv/t-elf32: Likewise. * config/riscv/t-elf64: Likewise. * config/riscv/t-softfp32: Likewise. * config/riscv/t-softfp64: Likewise. From-SVN: r245226 2017-02-06 22:38:51 +01:00			`$(srcdir)/config/riscv/div.S \`
			`$(srcdir)/config/riscv/atomic.c \`

RISC-V/libgcc: Use `-fasynchronous-unwind-tables' for LIB2_DIVMOD_FUNCS Use `-fasynchronous-unwind-tables' rather than `-fexceptions -fnon-call-exceptions' in LIB2_DIVMOD_FUNCS compilation flags so as to provide unwind tables for the affected functions while not pulling the unwinder proper, which is not required here. Beyond saving program space it fixes a RISC-V glibc build error due to unsatisfied `malloc' and `free' references from the unwinder causing link errors with `ld.so' where libgcc has been built at -O0. libgcc/ * config/riscv/t-elf (LIB2_DIVMOD_EXCEPTION_FLAGS): New variable. 2020-09-29 02:20:01 +02:00			`# Avoid the full unwinder being pulled along with the division libcalls.`
			`LIB2_DIVMOD_EXCEPTION_FLAGS := -fasynchronous-unwind-tables`