From 0a48860c27a8eb291bcc7616ea9eb073dc660cab Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Fri, 24 May 2019 10:46:08 -0400 Subject: add riscv64 architecture support Author: Alex Suykov Author: Aric Belsito Author: Drew DeVault Author: Michael Clark Author: Michael Forney Author: Stefan O'Rear This port has involved the work of many people over several years. I have tried to ensure that everyone with substantial contributions has been credited above; if any omissions are found they will be noted later in an update to the authors/contributors list in the COPYRIGHT file. The version committed here comes from the riscv/riscv-musl repo's commit 3fe7e2c75df78eef42dcdc352a55757729f451e2, with minor changes by me for issues found during final review: - a_ll/a_sc atomics are removed (according to the ISA spec, lr/sc are not safe to use in separate inline asm fragments) - a_cas[_p] is fixed to be a memory barrier - the call from the _start assembly into the C part of crt1/ldso is changed to allow for the possibility that the linker does not place them nearby each other. - DTP_OFFSET is defined correctly so that local-dynamic TLS works - reloc.h LDSO_ARCH logic is simplified and made explicit. - unused, non-functional crti/n asm files are removed. - an empty .sdata section is added to crt1 so that the __global_pointer reference is resolvable. - indentation style errors in some asm files are fixed. --- src/signal/riscv64/restore.s | 8 ++++++++ src/signal/riscv64/sigsetjmp.s | 23 +++++++++++++++++++++++ 2 files changed, 31 insertions(+) create mode 100644 src/signal/riscv64/restore.s create mode 100644 src/signal/riscv64/sigsetjmp.s (limited to 'src/signal') diff --git a/src/signal/riscv64/restore.s b/src/signal/riscv64/restore.s new file mode 100644 index 00000000..40012c75 --- /dev/null +++ b/src/signal/riscv64/restore.s @@ -0,0 +1,8 @@ +.global __restore +.type __restore, %function +__restore: +.global __restore_rt +.type __restore_rt, %function +__restore_rt: + li a7, 139 # SYS_rt_sigreturn + ecall diff --git a/src/signal/riscv64/sigsetjmp.s b/src/signal/riscv64/sigsetjmp.s new file mode 100644 index 00000000..f9bc162a --- /dev/null +++ b/src/signal/riscv64/sigsetjmp.s @@ -0,0 +1,23 @@ +.global sigsetjmp +.global __sigsetjmp +.type sigsetjmp, %function +.type __sigsetjmp, %function +sigsetjmp: +__sigsetjmp: + bnez a1, 1f + tail setjmp +1: + + sd ra, 208(a0) + sd s0, 224(a0) + mv s0, a0 + + call setjmp + + mv a1, a0 + mv a0, s0 + ld s0, 224(a0) + ld ra, 208(a0) + +.hidden __sigsetjmp_tail + tail __sigsetjmp_tail -- cgit v1.2.1