diff options
Diffstat (limited to 'arch/riscv64/asm')
| -rw-r--r-- | arch/riscv64/asm/asm-offsets.c | 77 | ||||
| -rw-r--r-- | arch/riscv64/asm/source.mk | 16 |
2 files changed, 93 insertions, 0 deletions
diff --git a/arch/riscv64/asm/asm-offsets.c b/arch/riscv64/asm/asm-offsets.c new file mode 100644 index 0000000..8852d8f --- /dev/null +++ b/arch/riscv64/asm/asm-offsets.c @@ -0,0 +1,77 @@ +/* SPDX-License-Identifier: GPL-3.0-or-later */ +/* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */ + +/** + * @file asm-offsets.c + * riscv64 file used to generate offsets to register slots in stack. Used by + * _save_context. + */ + +#include <apos/utils.h> +#include "../kernel/regs.h" + +/** + * Insert assembly comment with calculated value. + * Largely based on linux + * + * @param sym Name of symbol. + * @param val Value of symbol. + */ +#define DEFINE(sym, val) \ + __asm__ volatile ("\n#-> " #sym " %0 " #val "\n" : : "i" (val)) + +/** + * Insert offset of member in structure. + * + * @param m Member. + * @param s Structure. + */ +#define OFFSETOF(m, s) DEFINE(offsetof_##m, offsetof(s, m)) + +/** + * Insert size of structure. + * + * @param n Name of structure. + * @param s Structure. + */ +#define SIZEOF(n, s) DEFINE(sizeof_##n, sizeof(s)) + +/** + * Generate assembly with calculated offsets and sizes. + * See arch/riscv64/gen/source.mk for how the assembly is used. + */ +void asm_offsets() +{ + OFFSETOF(ra, struct riscv_regs); + OFFSETOF(sp, struct riscv_regs); + OFFSETOF(tp, struct riscv_regs); + OFFSETOF(gp, struct riscv_regs); + OFFSETOF(t0, struct riscv_regs); + OFFSETOF(t1, struct riscv_regs); + OFFSETOF(t2, struct riscv_regs); + OFFSETOF(s0, struct riscv_regs); + OFFSETOF(s1, struct riscv_regs); + OFFSETOF(a0, struct riscv_regs); + OFFSETOF(a1, struct riscv_regs); + OFFSETOF(a2, struct riscv_regs); + OFFSETOF(a3, struct riscv_regs); + OFFSETOF(a4, struct riscv_regs); + OFFSETOF(a5, struct riscv_regs); + OFFSETOF(a6, struct riscv_regs); + OFFSETOF(a7, struct riscv_regs); + OFFSETOF(s2, struct riscv_regs); + OFFSETOF(s3, struct riscv_regs); + OFFSETOF(s4, struct riscv_regs); + OFFSETOF(s5, struct riscv_regs); + OFFSETOF(s6, struct riscv_regs); + OFFSETOF(s7, struct riscv_regs); + OFFSETOF(s8, struct riscv_regs); + OFFSETOF(s9, struct riscv_regs); + OFFSETOF(s10, struct riscv_regs); + OFFSETOF(s11, struct riscv_regs); + OFFSETOF(t3, struct riscv_regs); + OFFSETOF(t4, struct riscv_regs); + OFFSETOF(t5, struct riscv_regs); + OFFSETOF(t6, struct riscv_regs); + SIZEOF(registers, struct riscv_regs); +} diff --git a/arch/riscv64/asm/source.mk b/arch/riscv64/asm/source.mk new file mode 100644 index 0000000..9b463b7 --- /dev/null +++ b/arch/riscv64/asm/source.mk @@ -0,0 +1,16 @@ +OFFSET_HEADER := $(ARCH_SOURCE)/kernel/gen/asm-offsets.h +OFFSET_SOURCE := $(ARCH_SOURCE)/asm/asm-offsets.c + +$(OFFSET_HEADER): $(OFFSET_SOURCE) + mkdir -p $$(dirname $(OFFSET_HEADER)) + echo "#ifndef APOS_ASM_OFFSETS_H" > $(OFFSET_HEADER) + echo "#define APOS_ASM_OFFSETS_H" >> $(OFFSET_HEADER) + echo "/**" >> $(OFFSET_HEADER) + echo " * @file asm-offsets.h" >> $(OFFSET_HEADER) + echo " * This comment is to shut up warnings." >> $(OFFSET_HEADER) + echo " */" >> $(OFFSET_HEADER) + $(COMPILER) $(INCLUDE_FLAGS) -S $(OFFSET_SOURCE) -o - |\ + awk '($$1 == "#->") { print "#define " $$2 " " $$3 }' >> $(OFFSET_HEADER) + echo "#endif /* APOS_ASM_OFFSETS_H */" >> $(OFFSET_HEADER) + +CLEANUP += $(ARCH_SOURCE)/kernel/gen |