diff options
Diffstat (limited to 'linux-user/mips/elfload.c')
| -rw-r--r-- | linux-user/mips/elfload.c | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/linux-user/mips/elfload.c b/linux-user/mips/elfload.c new file mode 100644 index 0000000000..e0c50f50ed --- /dev/null +++ b/linux-user/mips/elfload.c @@ -0,0 +1,142 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ + +#include "qemu/osdep.h" +#include "qemu.h" +#include "loader.h" +#include "elf.h" +#include "target_elf.h" + + +const char *get_elf_cpu_model(uint32_t eflags) +{ +#ifdef TARGET_MIPS64 + switch (eflags & EF_MIPS_MACH) { + case EF_MIPS_MACH_OCTEON: + case EF_MIPS_MACH_OCTEON2: + case EF_MIPS_MACH_OCTEON3: + return "Octeon68XX"; + case EF_MIPS_MACH_LS2E: + return "Loongson-2E"; + case EF_MIPS_MACH_LS2F: + return "Loongson-2F"; + case EF_MIPS_MACH_LS3A: + return "Loongson-3A1000"; + default: + break; + } + switch (eflags & EF_MIPS_ARCH) { + case EF_MIPS_ARCH_64R6: + return "I6400"; + case EF_MIPS_ARCH_64R2: + return "MIPS64R2-generic"; + default: + break; + } + return "5KEf"; +#else + if ((eflags & EF_MIPS_ARCH) == EF_MIPS_ARCH_32R6) { + return "mips32r6-generic"; + } + if (eflags & EF_MIPS_NAN2008) { + return "P5600"; + } + return "24Kf"; +#endif +} + +/* See arch/mips/include/uapi/asm/hwcap.h. */ +enum { + HWCAP_MIPS_R6 = (1 << 0), + HWCAP_MIPS_MSA = (1 << 1), + HWCAP_MIPS_CRC32 = (1 << 2), + HWCAP_MIPS_MIPS16 = (1 << 3), + HWCAP_MIPS_MDMX = (1 << 4), + HWCAP_MIPS_MIPS3D = (1 << 5), + HWCAP_MIPS_SMARTMIPS = (1 << 6), + HWCAP_MIPS_DSP = (1 << 7), + HWCAP_MIPS_DSP2 = (1 << 8), + HWCAP_MIPS_DSP3 = (1 << 9), + HWCAP_MIPS_MIPS16E2 = (1 << 10), + HWCAP_LOONGSON_MMI = (1 << 11), + HWCAP_LOONGSON_EXT = (1 << 12), + HWCAP_LOONGSON_EXT2 = (1 << 13), + HWCAP_LOONGSON_CPUCFG = (1 << 14), +}; + +#define GET_FEATURE_INSN(_flag, _hwcap) \ + do { if (cpu->env.insn_flags & (_flag)) { hwcaps |= _hwcap; } } while (0) + +#define GET_FEATURE_REG_SET(_reg, _mask, _hwcap) \ + do { if (cpu->env._reg & (_mask)) { hwcaps |= _hwcap; } } while (0) + +#define GET_FEATURE_REG_EQU(_reg, _start, _length, _val, _hwcap) \ + do { \ + if (extract32(cpu->env._reg, (_start), (_length)) == (_val)) { \ + hwcaps |= _hwcap; \ + } \ + } while (0) + +abi_ulong get_elf_hwcap(CPUState *cs) +{ + MIPSCPU *cpu = MIPS_CPU(cs); + abi_ulong hwcaps = 0; + + GET_FEATURE_REG_EQU(CP0_Config0, CP0C0_AR, CP0C0_AR_LENGTH, + 2, HWCAP_MIPS_R6); + GET_FEATURE_REG_SET(CP0_Config3, 1 << CP0C3_MSAP, HWCAP_MIPS_MSA); + GET_FEATURE_INSN(ASE_LMMI, HWCAP_LOONGSON_MMI); + GET_FEATURE_INSN(ASE_LEXT, HWCAP_LOONGSON_EXT); + + return hwcaps; +} + +#undef GET_FEATURE_REG_EQU +#undef GET_FEATURE_REG_SET +#undef GET_FEATURE_INSN + +#define MATCH_PLATFORM_INSN(_flags, _base_platform) \ + do { if ((cpu->env.insn_flags & (_flags)) == _flags) \ + { return _base_platform; } } while (0) + +const char *get_elf_base_platform(CPUState *cs) +{ + MIPSCPU *cpu = MIPS_CPU(cs); + + /* 64 bit ISAs goes first */ + MATCH_PLATFORM_INSN(CPU_MIPS64R6, "mips64r6"); + MATCH_PLATFORM_INSN(CPU_MIPS64R5, "mips64r5"); + MATCH_PLATFORM_INSN(CPU_MIPS64R2, "mips64r2"); + MATCH_PLATFORM_INSN(CPU_MIPS64R1, "mips64"); + MATCH_PLATFORM_INSN(CPU_MIPS5, "mips5"); + MATCH_PLATFORM_INSN(CPU_MIPS4, "mips4"); + MATCH_PLATFORM_INSN(CPU_MIPS3, "mips3"); + + /* 32 bit ISAs */ + MATCH_PLATFORM_INSN(CPU_MIPS32R6, "mips32r6"); + MATCH_PLATFORM_INSN(CPU_MIPS32R5, "mips32r5"); + MATCH_PLATFORM_INSN(CPU_MIPS32R2, "mips32r2"); + MATCH_PLATFORM_INSN(CPU_MIPS32R1, "mips32"); + MATCH_PLATFORM_INSN(CPU_MIPS2, "mips2"); + + /* Fallback */ + return "mips"; +} + +#undef MATCH_PLATFORM_INSN + +/* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */ +void elf_core_copy_regs(target_elf_gregset_t *r, const CPUMIPSState *env) +{ + for (int i = 1; i < ARRAY_SIZE(env->active_tc.gpr); i++) { + r->pt.regs[i] = tswapl(env->active_tc.gpr[i]); + } + + r->pt.regs[26] = 0; + r->pt.regs[27] = 0; + r->pt.lo = tswapl(env->active_tc.LO[0]); + r->pt.hi = tswapl(env->active_tc.HI[0]); + r->pt.cp0_epc = tswapl(env->active_tc.PC); + r->pt.cp0_badvaddr = tswapl(env->CP0_BadVAddr); + r->pt.cp0_status = tswapl(env->CP0_Status); + r->pt.cp0_cause = tswapl(env->CP0_Cause); +} |