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Mon, 01 Nov 2021 05:52:49 -0400 Received: from kvm-dev1.localdomain (unknown [10.2.5.134]) by mail.loongson.cn (Coremail) with SMTP id AQAAf9Dxn2u3uH9hbKIjAA--.55994S22; Mon, 01 Nov 2021 17:52:28 +0800 (CST) From: Song Gao To: qemu-devel@nongnu.org Subject: [PATCH v8 20/29] linux-user: Add LoongArch elf support Date: Mon, 1 Nov 2021 17:51:42 +0800 Message-Id: <1635760311-20015-21-git-send-email-gaosong@loongson.cn> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1635760311-20015-1-git-send-email-gaosong@loongson.cn> References: <1635760311-20015-1-git-send-email-gaosong@loongson.cn> X-CM-TRANSID: AQAAf9Dxn2u3uH9hbKIjAA--.55994S22 X-Coremail-Antispam: 1UD129KBjvJXoWxXrWUGr1xKr47uF15Kr45Jrb_yoW5CrWxpF WUCay5Gr4rtFZxKw1fta4UWF15Zw18ur17C34xWFWrAwsxJ348Wr1kKrWqyFy3Za9Ygayj vF90yw4jkr47XaDanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnUUvcSsGvfC2KfnxnUUI43ZEXa7xR_UUUUUUUUU== X-CM-SenderInfo: 5jdr20tqj6z05rqj20fqof0/ Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; 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charset="utf-8" Signed-off-by: Song Gao Signed-off-by: Xiaojuan Yang --- include/elf.h | 2 ++ linux-user/elfload.c | 58 +++++++++++++++++++++++++++++++++= ++++ linux-user/loongarch64/target_elf.h | 14 +++++++++ 3 files changed, 74 insertions(+) create mode 100644 linux-user/loongarch64/target_elf.h diff --git a/include/elf.h b/include/elf.h index 811bf4a..3a4bcb6 100644 --- a/include/elf.h +++ b/include/elf.h @@ -182,6 +182,8 @@ typedef struct mips_elf_abiflags_v0 { =20 #define EM_NANOMIPS 249 /* Wave Computing nanoMIPS */ =20 +#define EM_LOONGARCH 258 /* LoongArch */ + /* * This is an interim value that we will use until the committee comes * up with a final number. diff --git a/linux-user/elfload.c b/linux-user/elfload.c index f9b8261..b703300 100644 --- a/linux-user/elfload.c +++ b/linux-user/elfload.c @@ -914,6 +914,64 @@ static void elf_core_copy_regs(target_elf_gregset_t *r= egs, const CPUPPCState *en =20 #endif =20 +#ifdef TARGET_LOONGARCH64 + +#define ELF_START_MMAP 0x80000000 + +#define ELF_CLASS ELFCLASS64 +#define ELF_ARCH EM_LOONGARCH + +#define elf_check_arch(x) ((x) =3D=3D EM_LOONGARCH) +static inline void init_thread(struct target_pt_regs *regs, + struct image_info *infop) +{ + regs->csr_crmd =3D 2 << 3; + regs->csr_era =3D infop->entry; + regs->regs[3] =3D infop->start_stack; +} + +/* See linux kernel: arch/loongarch/include/asm/elf.h. */ +#define ELF_NREG 45 +typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; + +/* See linux kernel: arch/loongarch/include/asm/reg.h. */ +enum { + TARGET_EF_R0 =3D 0, + TARGET_EF_CSR_ERA =3D TARGET_EF_R0 + 32, + TARGET_EF_CSR_BADVADDR =3D TARGET_EF_R0 + 33, +}; + +/* See linux kernel: arch/loongarch/kernel/process.c:loongarch_dump_regs64= . */ +static void elf_core_copy_regs(target_elf_gregset_t *regs, + const CPULoongArchState *env) +{ + int i; + + for (i =3D 0; i < TARGET_EF_R0; i++) { + (*regs)[i] =3D 0; + } + (*regs)[TARGET_EF_R0] =3D 0; + + for (i =3D 1; i < ARRAY_SIZE(env->gpr); i++) { + (*regs)[TARGET_EF_R0 + i] =3D tswapreg(env->gpr[i]); + } + + (*regs)[TARGET_EF_CSR_ERA] =3D tswapreg(env->pc); + (*regs)[TARGET_EF_CSR_BADVADDR] =3D tswapreg(env->badaddr); +} + +#define USE_ELF_CORE_DUMP +#define ELF_EXEC_PAGESIZE 4096 + +#define ELF_HWCAP get_elf_hwcap() + +static uint32_t get_elf_hwcap(void) +{ + return 0; +} + +#endif /* TARGET_LOONGARCH64 */ + #ifdef TARGET_MIPS =20 #define ELF_START_MMAP 0x80000000 diff --git a/linux-user/loongarch64/target_elf.h b/linux-user/loongarch64/t= arget_elf.h new file mode 100644 index 0000000..7c88394 --- /dev/null +++ b/linux-user/loongarch64/target_elf.h @@ -0,0 +1,14 @@ +/* + * Copyright (c) 2021 Loongson Technology Corporation Limited + * + * SPDX-License-Identifier: LGPL-2.1+ + */ + + +#ifndef LOONGARCH_TARGET_ELF_H +#define LOONGARCH_TARGET_ELF_H +static inline const char *cpu_get_model(uint32_t eflags) +{ + return "Loongson-3A5000"; +} +#endif --=20 1.8.3.1