diff options
Diffstat (limited to 'linux-user/arm/elfload.c')
| -rw-r--r-- | linux-user/arm/elfload.c | 276 |
1 files changed, 276 insertions, 0 deletions
diff --git a/linux-user/arm/elfload.c b/linux-user/arm/elfload.c new file mode 100644 index 0000000..b1a4db4 --- /dev/null +++ b/linux-user/arm/elfload.c @@ -0,0 +1,276 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ + +#include "qemu/osdep.h" +#include "qemu.h" +#include "loader.h" +#include "user-internals.h" +#include "target_elf.h" +#include "target/arm/cpu-features.h" +#include "target_elf.h" +#include "elf.h" + + +const char *get_elf_cpu_model(uint32_t eflags) +{ + return "any"; +} + +enum +{ + ARM_HWCAP_ARM_SWP = 1 << 0, + ARM_HWCAP_ARM_HALF = 1 << 1, + ARM_HWCAP_ARM_THUMB = 1 << 2, + ARM_HWCAP_ARM_26BIT = 1 << 3, + ARM_HWCAP_ARM_FAST_MULT = 1 << 4, + ARM_HWCAP_ARM_FPA = 1 << 5, + ARM_HWCAP_ARM_VFP = 1 << 6, + ARM_HWCAP_ARM_EDSP = 1 << 7, + ARM_HWCAP_ARM_JAVA = 1 << 8, + ARM_HWCAP_ARM_IWMMXT = 1 << 9, + ARM_HWCAP_ARM_CRUNCH = 1 << 10, + ARM_HWCAP_ARM_THUMBEE = 1 << 11, + ARM_HWCAP_ARM_NEON = 1 << 12, + ARM_HWCAP_ARM_VFPv3 = 1 << 13, + ARM_HWCAP_ARM_VFPv3D16 = 1 << 14, + ARM_HWCAP_ARM_TLS = 1 << 15, + ARM_HWCAP_ARM_VFPv4 = 1 << 16, + ARM_HWCAP_ARM_IDIVA = 1 << 17, + ARM_HWCAP_ARM_IDIVT = 1 << 18, + ARM_HWCAP_ARM_VFPD32 = 1 << 19, + ARM_HWCAP_ARM_LPAE = 1 << 20, + ARM_HWCAP_ARM_EVTSTRM = 1 << 21, + ARM_HWCAP_ARM_FPHP = 1 << 22, + ARM_HWCAP_ARM_ASIMDHP = 1 << 23, + ARM_HWCAP_ARM_ASIMDDP = 1 << 24, + ARM_HWCAP_ARM_ASIMDFHM = 1 << 25, + ARM_HWCAP_ARM_ASIMDBF16 = 1 << 26, + ARM_HWCAP_ARM_I8MM = 1 << 27, +}; + +enum { + ARM_HWCAP2_ARM_AES = 1 << 0, + ARM_HWCAP2_ARM_PMULL = 1 << 1, + ARM_HWCAP2_ARM_SHA1 = 1 << 2, + ARM_HWCAP2_ARM_SHA2 = 1 << 3, + ARM_HWCAP2_ARM_CRC32 = 1 << 4, + ARM_HWCAP2_ARM_SB = 1 << 5, + ARM_HWCAP2_ARM_SSBS = 1 << 6, +}; + +abi_ulong get_elf_hwcap(CPUState *cs) +{ + ARMCPU *cpu = ARM_CPU(cs); + abi_ulong hwcaps = 0; + + hwcaps |= ARM_HWCAP_ARM_SWP; + hwcaps |= ARM_HWCAP_ARM_HALF; + hwcaps |= ARM_HWCAP_ARM_THUMB; + hwcaps |= ARM_HWCAP_ARM_FAST_MULT; + + /* probe for the extra features */ +#define GET_FEATURE(feat, hwcap) \ + do { if (arm_feature(&cpu->env, feat)) { hwcaps |= hwcap; } } while (0) + +#define GET_FEATURE_ID(feat, hwcap) \ + do { if (cpu_isar_feature(feat, cpu)) { hwcaps |= hwcap; } } while (0) + + /* EDSP is in v5TE and above, but all our v5 CPUs are v5TE */ + GET_FEATURE(ARM_FEATURE_V5, ARM_HWCAP_ARM_EDSP); + GET_FEATURE(ARM_FEATURE_THUMB2EE, ARM_HWCAP_ARM_THUMBEE); + GET_FEATURE(ARM_FEATURE_NEON, ARM_HWCAP_ARM_NEON); + GET_FEATURE(ARM_FEATURE_V6K, ARM_HWCAP_ARM_TLS); + GET_FEATURE(ARM_FEATURE_LPAE, ARM_HWCAP_ARM_LPAE); + GET_FEATURE_ID(aa32_arm_div, ARM_HWCAP_ARM_IDIVA); + GET_FEATURE_ID(aa32_thumb_div, ARM_HWCAP_ARM_IDIVT); + GET_FEATURE_ID(aa32_vfp, ARM_HWCAP_ARM_VFP); + + if (cpu_isar_feature(aa32_fpsp_v3, cpu) || + cpu_isar_feature(aa32_fpdp_v3, cpu)) { + hwcaps |= ARM_HWCAP_ARM_VFPv3; + if (cpu_isar_feature(aa32_simd_r32, cpu)) { + hwcaps |= ARM_HWCAP_ARM_VFPD32; + } else { + hwcaps |= ARM_HWCAP_ARM_VFPv3D16; + } + } + GET_FEATURE_ID(aa32_simdfmac, ARM_HWCAP_ARM_VFPv4); + /* + * MVFR1.FPHP and .SIMDHP must be in sync, and QEMU uses the same + * isar_feature function for both. The kernel reports them as two hwcaps. + */ + GET_FEATURE_ID(aa32_fp16_arith, ARM_HWCAP_ARM_FPHP); + GET_FEATURE_ID(aa32_fp16_arith, ARM_HWCAP_ARM_ASIMDHP); + GET_FEATURE_ID(aa32_dp, ARM_HWCAP_ARM_ASIMDDP); + GET_FEATURE_ID(aa32_fhm, ARM_HWCAP_ARM_ASIMDFHM); + GET_FEATURE_ID(aa32_bf16, ARM_HWCAP_ARM_ASIMDBF16); + GET_FEATURE_ID(aa32_i8mm, ARM_HWCAP_ARM_I8MM); + + return hwcaps; +} + +abi_ulong get_elf_hwcap2(CPUState *cs) +{ + ARMCPU *cpu = ARM_CPU(cs); + abi_ulong hwcaps = 0; + + GET_FEATURE_ID(aa32_aes, ARM_HWCAP2_ARM_AES); + GET_FEATURE_ID(aa32_pmull, ARM_HWCAP2_ARM_PMULL); + GET_FEATURE_ID(aa32_sha1, ARM_HWCAP2_ARM_SHA1); + GET_FEATURE_ID(aa32_sha2, ARM_HWCAP2_ARM_SHA2); + GET_FEATURE_ID(aa32_crc32, ARM_HWCAP2_ARM_CRC32); + GET_FEATURE_ID(aa32_sb, ARM_HWCAP2_ARM_SB); + GET_FEATURE_ID(aa32_ssbs, ARM_HWCAP2_ARM_SSBS); + return hwcaps; +} + +const char *elf_hwcap_str(uint32_t bit) +{ + static const char *hwcap_str[] = { + [__builtin_ctz(ARM_HWCAP_ARM_SWP )] = "swp", + [__builtin_ctz(ARM_HWCAP_ARM_HALF )] = "half", + [__builtin_ctz(ARM_HWCAP_ARM_THUMB )] = "thumb", + [__builtin_ctz(ARM_HWCAP_ARM_26BIT )] = "26bit", + [__builtin_ctz(ARM_HWCAP_ARM_FAST_MULT)] = "fast_mult", + [__builtin_ctz(ARM_HWCAP_ARM_FPA )] = "fpa", + [__builtin_ctz(ARM_HWCAP_ARM_VFP )] = "vfp", + [__builtin_ctz(ARM_HWCAP_ARM_EDSP )] = "edsp", + [__builtin_ctz(ARM_HWCAP_ARM_JAVA )] = "java", + [__builtin_ctz(ARM_HWCAP_ARM_IWMMXT )] = "iwmmxt", + [__builtin_ctz(ARM_HWCAP_ARM_CRUNCH )] = "crunch", + [__builtin_ctz(ARM_HWCAP_ARM_THUMBEE )] = "thumbee", + [__builtin_ctz(ARM_HWCAP_ARM_NEON )] = "neon", + [__builtin_ctz(ARM_HWCAP_ARM_VFPv3 )] = "vfpv3", + [__builtin_ctz(ARM_HWCAP_ARM_VFPv3D16 )] = "vfpv3d16", + [__builtin_ctz(ARM_HWCAP_ARM_TLS )] = "tls", + [__builtin_ctz(ARM_HWCAP_ARM_VFPv4 )] = "vfpv4", + [__builtin_ctz(ARM_HWCAP_ARM_IDIVA )] = "idiva", + [__builtin_ctz(ARM_HWCAP_ARM_IDIVT )] = "idivt", + [__builtin_ctz(ARM_HWCAP_ARM_VFPD32 )] = "vfpd32", + [__builtin_ctz(ARM_HWCAP_ARM_LPAE )] = "lpae", + [__builtin_ctz(ARM_HWCAP_ARM_EVTSTRM )] = "evtstrm", + [__builtin_ctz(ARM_HWCAP_ARM_FPHP )] = "fphp", + [__builtin_ctz(ARM_HWCAP_ARM_ASIMDHP )] = "asimdhp", + [__builtin_ctz(ARM_HWCAP_ARM_ASIMDDP )] = "asimddp", + [__builtin_ctz(ARM_HWCAP_ARM_ASIMDFHM )] = "asimdfhm", + [__builtin_ctz(ARM_HWCAP_ARM_ASIMDBF16)] = "asimdbf16", + [__builtin_ctz(ARM_HWCAP_ARM_I8MM )] = "i8mm", + }; + + return bit < ARRAY_SIZE(hwcap_str) ? hwcap_str[bit] : NULL; +} + +const char *elf_hwcap2_str(uint32_t bit) +{ + static const char *hwcap_str[] = { + [__builtin_ctz(ARM_HWCAP2_ARM_AES )] = "aes", + [__builtin_ctz(ARM_HWCAP2_ARM_PMULL)] = "pmull", + [__builtin_ctz(ARM_HWCAP2_ARM_SHA1 )] = "sha1", + [__builtin_ctz(ARM_HWCAP2_ARM_SHA2 )] = "sha2", + [__builtin_ctz(ARM_HWCAP2_ARM_CRC32)] = "crc32", + [__builtin_ctz(ARM_HWCAP2_ARM_SB )] = "sb", + [__builtin_ctz(ARM_HWCAP2_ARM_SSBS )] = "ssbs", + }; + + return bit < ARRAY_SIZE(hwcap_str) ? hwcap_str[bit] : NULL; +} + +const char *get_elf_platform(CPUState *cs) +{ + CPUARMState *env = cpu_env(cs); + +#if TARGET_BIG_ENDIAN +# define END "b" +#else +# define END "l" +#endif + + if (arm_feature(env, ARM_FEATURE_V8)) { + return "v8" END; + } else if (arm_feature(env, ARM_FEATURE_V7)) { + if (arm_feature(env, ARM_FEATURE_M)) { + return "v7m" END; + } else { + return "v7" END; + } + } else if (arm_feature(env, ARM_FEATURE_V6)) { + return "v6" END; + } else if (arm_feature(env, ARM_FEATURE_V5)) { + return "v5" END; + } else { + return "v4" END; + } + +#undef END +} + +bool init_guest_commpage(void) +{ + ARMCPU *cpu = ARM_CPU(thread_cpu); + int host_page_size = qemu_real_host_page_size(); + abi_ptr commpage; + void *want; + void *addr; + + /* + * M-profile allocates maximum of 2GB address space, so can never + * allocate the commpage. Skip it. + */ + if (arm_feature(&cpu->env, ARM_FEATURE_M)) { + return true; + } + + commpage = HI_COMMPAGE & -host_page_size; + want = g2h_untagged(commpage); + addr = mmap(want, host_page_size, PROT_READ | PROT_WRITE, + MAP_ANONYMOUS | MAP_PRIVATE | + (commpage < reserved_va ? MAP_FIXED : MAP_FIXED_NOREPLACE), + -1, 0); + + if (addr == MAP_FAILED) { + perror("Allocating guest commpage"); + exit(EXIT_FAILURE); + } + if (addr != want) { + return false; + } + + /* Set kernel helper versions; rest of page is 0. */ + __put_user(5, (uint32_t *)g2h_untagged(0xffff0ffcu)); + + if (mprotect(addr, host_page_size, PROT_READ)) { + perror("Protecting guest commpage"); + exit(EXIT_FAILURE); + } + + page_set_flags(commpage, commpage | (host_page_size - 1), + PAGE_READ | PAGE_EXEC | PAGE_VALID); + return true; +} + +void elf_core_copy_regs(target_elf_gregset_t *r, const CPUARMState *env) +{ + for (int i = 0; i < 16; ++i) { + r->pt.regs[i] = tswapal(env->regs[i]); + } + r->pt.cpsr = tswapal(cpsr_read((CPUARMState *)env)); + r->pt.orig_r0 = tswapal(env->regs[0]); /* FIXME */ +} + +#if TARGET_BIG_ENDIAN +# include "vdso-be8.c.inc" +# include "vdso-be32.c.inc" +#else +# include "vdso-le.c.inc" +#endif + +const VdsoImageInfo *get_vdso_image_info(uint32_t elf_flags) +{ +#if TARGET_BIG_ENDIAN + return (EF_ARM_EABI_VERSION(elf_flags) >= EF_ARM_EABI_VER4 + && (elf_flags & EF_ARM_BE8) + ? &vdso_be8_image_info + : &vdso_be32_image_info); +#else + return &vdso_image_info; +#endif +} |