From cb46938c45144045c1ae278abb05b6a1cf2de445 Mon Sep 17 00:00:00 2001 From: Kito Cheng Date: Tue, 6 Jul 2021 11:50:15 +0800 Subject: [PATCH] linux-user/elfload: Implement ELF_HWCAP for RISC-V Set I, M, A, F, D and C bit for hwcap if misa is set. Signed-off-by: Kito Cheng Reviewed-by: Richard Henderson Message-Id: <20210706035015.122899-1-kito.cheng@sifive.com> Signed-off-by: Laurent Vivier --- linux-user/elfload.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/linux-user/elfload.c b/linux-user/elfload.c index 598ab8aa13..42ef2a1148 100644 --- a/linux-user/elfload.c +++ b/linux-user/elfload.c @@ -1434,6 +1434,19 @@ static void elf_core_copy_regs(target_elf_gregset_t *regs, #define ELF_CLASS ELFCLASS64 #endif +#define ELF_HWCAP get_elf_hwcap() + +static uint32_t get_elf_hwcap(void) +{ +#define MISA_BIT(EXT) (1 << (EXT - 'A')) + RISCVCPU *cpu = RISCV_CPU(thread_cpu); + uint32_t mask = MISA_BIT('I') | MISA_BIT('M') | MISA_BIT('A') + | MISA_BIT('F') | MISA_BIT('D') | MISA_BIT('C'); + + return cpu->env.misa & mask; +#undef MISA_BIT +} + static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) {