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authorKito Cheng <kito.cheng@sifive.com>2021-07-06 11:50:15 +0800
committerLaurent Vivier <laurent@vivier.eu>2021-07-07 21:14:47 +0200
commitcb46938c45144045c1ae278abb05b6a1cf2de445 (patch)
treed13cfd8b9c2c50ed179cda69f38e031140943669
parent9aef0954195cc592e86846dbbe7f3c2c5603690a (diff)
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 <kito.cheng@sifive.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20210706035015.122899-1-kito.cheng@sifive.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
-rw-r--r--linux-user/elfload.c13
1 files changed, 13 insertions, 0 deletions
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)
{