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- /* This is the Linux kernel elf-loading code, ported into user space */
- #include <sys/time.h>
- #include <sys/param.h>
- #include <stdio.h>
- #include <sys/types.h>
- #include <fcntl.h>
- #include <errno.h>
- #include <unistd.h>
- #include <sys/mman.h>
- #include <sys/resource.h>
- #include <stdlib.h>
- #include <string.h>
- #include <time.h>
- #include "qemu.h"
- #include "disas/disas.h"
- #ifdef _ARCH_PPC64
- #undef ARCH_DLINFO
- #undef ELF_PLATFORM
- #undef ELF_HWCAP
- #undef ELF_CLASS
- #undef ELF_DATA
- #undef ELF_ARCH
- #endif
- #define ELF_OSABI ELFOSABI_SYSV
- /* from personality.h */
- /*
- * Flags for bug emulation.
- *
- * These occupy the top three bytes.
- */
- enum {
- ADDR_NO_RANDOMIZE = 0x0040000, /* disable randomization of VA space */
- FDPIC_FUNCPTRS = 0x0080000, /* userspace function ptrs point to
- descriptors (signal handling) */
- MMAP_PAGE_ZERO = 0x0100000,
- ADDR_COMPAT_LAYOUT = 0x0200000,
- READ_IMPLIES_EXEC = 0x0400000,
- ADDR_LIMIT_32BIT = 0x0800000,
- SHORT_INODE = 0x1000000,
- WHOLE_SECONDS = 0x2000000,
- STICKY_TIMEOUTS = 0x4000000,
- ADDR_LIMIT_3GB = 0x8000000,
- };
- /*
- * Personality types.
- *
- * These go in the low byte. Avoid using the top bit, it will
- * conflict with error returns.
- */
- enum {
- PER_LINUX = 0x0000,
- PER_LINUX_32BIT = 0x0000 | ADDR_LIMIT_32BIT,
- PER_LINUX_FDPIC = 0x0000 | FDPIC_FUNCPTRS,
- PER_SVR4 = 0x0001 | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
- PER_SVR3 = 0x0002 | STICKY_TIMEOUTS | SHORT_INODE,
- PER_SCOSVR3 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS | SHORT_INODE,
- PER_OSR5 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS,
- PER_WYSEV386 = 0x0004 | STICKY_TIMEOUTS | SHORT_INODE,
- PER_ISCR4 = 0x0005 | STICKY_TIMEOUTS,
- PER_BSD = 0x0006,
- PER_SUNOS = 0x0006 | STICKY_TIMEOUTS,
- PER_XENIX = 0x0007 | STICKY_TIMEOUTS | SHORT_INODE,
- PER_LINUX32 = 0x0008,
- PER_LINUX32_3GB = 0x0008 | ADDR_LIMIT_3GB,
- PER_IRIX32 = 0x0009 | STICKY_TIMEOUTS,/* IRIX5 32-bit */
- PER_IRIXN32 = 0x000a | STICKY_TIMEOUTS,/* IRIX6 new 32-bit */
- PER_IRIX64 = 0x000b | STICKY_TIMEOUTS,/* IRIX6 64-bit */
- PER_RISCOS = 0x000c,
- PER_SOLARIS = 0x000d | STICKY_TIMEOUTS,
- PER_UW7 = 0x000e | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,
- PER_OSF4 = 0x000f, /* OSF/1 v4 */
- PER_HPUX = 0x0010,
- PER_MASK = 0x00ff,
- };
- /*
- * Return the base personality without flags.
- */
- #define personality(pers) (pers & PER_MASK)
- /* this flag is uneffective under linux too, should be deleted */
- #ifndef MAP_DENYWRITE
- #define MAP_DENYWRITE 0
- #endif
- /* should probably go in elf.h */
- #ifndef ELIBBAD
- #define ELIBBAD 80
- #endif
- #ifdef TARGET_WORDS_BIGENDIAN
- #define ELF_DATA ELFDATA2MSB
- #else
- #define ELF_DATA ELFDATA2LSB
- #endif
- #ifdef TARGET_ABI_MIPSN32
- typedef abi_ullong target_elf_greg_t;
- #define tswapreg(ptr) tswap64(ptr)
- #else
- typedef abi_ulong target_elf_greg_t;
- #define tswapreg(ptr) tswapal(ptr)
- #endif
- #ifdef USE_UID16
- typedef abi_ushort target_uid_t;
- typedef abi_ushort target_gid_t;
- #else
- typedef abi_uint target_uid_t;
- typedef abi_uint target_gid_t;
- #endif
- typedef abi_int target_pid_t;
- #ifdef TARGET_I386
- #define ELF_PLATFORM get_elf_platform()
- static const char *get_elf_platform(void)
- {
- static char elf_platform[] = "i386";
- int family = object_property_get_int(OBJECT(thread_cpu), "family", NULL);
- if (family > 6)
- family = 6;
- if (family >= 3)
- elf_platform[1] = '0' + family;
- return elf_platform;
- }
- #define ELF_HWCAP get_elf_hwcap()
- static uint32_t get_elf_hwcap(void)
- {
- X86CPU *cpu = X86_CPU(thread_cpu);
- return cpu->env.features[FEAT_1_EDX];
- }
- #ifdef TARGET_X86_64
- #define ELF_START_MMAP 0x2aaaaab000ULL
- #define elf_check_arch(x) ( ((x) == ELF_ARCH) )
- #define ELF_CLASS ELFCLASS64
- #define ELF_ARCH EM_X86_64
- static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
- {
- regs->rax = 0;
- regs->rsp = infop->start_stack;
- regs->rip = infop->entry;
- }
- #define ELF_NREG 27
- typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
- /*
- * Note that ELF_NREG should be 29 as there should be place for
- * TRAPNO and ERR "registers" as well but linux doesn't dump
- * those.
- *
- * See linux kernel: arch/x86/include/asm/elf.h
- */
- static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUX86State *env)
- {
- (*regs)[0] = env->regs[15];
- (*regs)[1] = env->regs[14];
- (*regs)[2] = env->regs[13];
- (*regs)[3] = env->regs[12];
- (*regs)[4] = env->regs[R_EBP];
- (*regs)[5] = env->regs[R_EBX];
- (*regs)[6] = env->regs[11];
- (*regs)[7] = env->regs[10];
- (*regs)[8] = env->regs[9];
- (*regs)[9] = env->regs[8];
- (*regs)[10] = env->regs[R_EAX];
- (*regs)[11] = env->regs[R_ECX];
- (*regs)[12] = env->regs[R_EDX];
- (*regs)[13] = env->regs[R_ESI];
- (*regs)[14] = env->regs[R_EDI];
- (*regs)[15] = env->regs[R_EAX]; /* XXX */
- (*regs)[16] = env->eip;
- (*regs)[17] = env->segs[R_CS].selector & 0xffff;
- (*regs)[18] = env->eflags;
- (*regs)[19] = env->regs[R_ESP];
- (*regs)[20] = env->segs[R_SS].selector & 0xffff;
- (*regs)[21] = env->segs[R_FS].selector & 0xffff;
- (*regs)[22] = env->segs[R_GS].selector & 0xffff;
- (*regs)[23] = env->segs[R_DS].selector & 0xffff;
- (*regs)[24] = env->segs[R_ES].selector & 0xffff;
- (*regs)[25] = env->segs[R_FS].selector & 0xffff;
- (*regs)[26] = env->segs[R_GS].selector & 0xffff;
- }
- #else
- #define ELF_START_MMAP 0x80000000
- /*
- * This is used to ensure we don't load something for the wrong architecture.
- */
- #define elf_check_arch(x) ( ((x) == EM_386) || ((x) == EM_486) )
- /*
- * These are used to set parameters in the core dumps.
- */
- #define ELF_CLASS ELFCLASS32
- #define ELF_ARCH EM_386
- static inline void init_thread(struct target_pt_regs *regs,
- struct image_info *infop)
- {
- regs->esp = infop->start_stack;
- regs->eip = infop->entry;
- /* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program
- starts %edx contains a pointer to a function which might be
- registered using `atexit'. This provides a mean for the
- dynamic linker to call DT_FINI functions for shared libraries
- that have been loaded before the code runs.
- A value of 0 tells we have no such handler. */
- regs->edx = 0;
- }
- #define ELF_NREG 17
- typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
- /*
- * Note that ELF_NREG should be 19 as there should be place for
- * TRAPNO and ERR "registers" as well but linux doesn't dump
- * those.
- *
- * See linux kernel: arch/x86/include/asm/elf.h
- */
- static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUX86State *env)
- {
- (*regs)[0] = env->regs[R_EBX];
- (*regs)[1] = env->regs[R_ECX];
- (*regs)[2] = env->regs[R_EDX];
- (*regs)[3] = env->regs[R_ESI];
- (*regs)[4] = env->regs[R_EDI];
- (*regs)[5] = env->regs[R_EBP];
- (*regs)[6] = env->regs[R_EAX];
- (*regs)[7] = env->segs[R_DS].selector & 0xffff;
- (*regs)[8] = env->segs[R_ES].selector & 0xffff;
- (*regs)[9] = env->segs[R_FS].selector & 0xffff;
- (*regs)[10] = env->segs[R_GS].selector & 0xffff;
- (*regs)[11] = env->regs[R_EAX]; /* XXX */
- (*regs)[12] = env->eip;
- (*regs)[13] = env->segs[R_CS].selector & 0xffff;
- (*regs)[14] = env->eflags;
- (*regs)[15] = env->regs[R_ESP];
- (*regs)[16] = env->segs[R_SS].selector & 0xffff;
- }
- #endif
- #define USE_ELF_CORE_DUMP
- #define ELF_EXEC_PAGESIZE 4096
- #endif
- #ifdef TARGET_ARM
- #ifndef TARGET_AARCH64
- /* 32 bit ARM definitions */
- #define ELF_START_MMAP 0x80000000
- #define elf_check_arch(x) ((x) == ELF_MACHINE)
- #define ELF_ARCH ELF_MACHINE
- #define ELF_CLASS ELFCLASS32
- static inline void init_thread(struct target_pt_regs *regs,
- struct image_info *infop)
- {
- abi_long stack = infop->start_stack;
- memset(regs, 0, sizeof(*regs));
- regs->ARM_cpsr = 0x10;
- if (infop->entry & 1)
- regs->ARM_cpsr |= CPSR_T;
- regs->ARM_pc = infop->entry & 0xfffffffe;
- regs->ARM_sp = infop->start_stack;
- /* FIXME - what to for failure of get_user()? */
- get_user_ual(regs->ARM_r2, stack + 8); /* envp */
- get_user_ual(regs->ARM_r1, stack + 4); /* envp */
- /* XXX: it seems that r0 is zeroed after ! */
- regs->ARM_r0 = 0;
- /* For uClinux PIC binaries. */
- /* XXX: Linux does this only on ARM with no MMU (do we care ?) */
- regs->ARM_r10 = infop->start_data;
- }
- #define ELF_NREG 18
- typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
- static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUARMState *env)
- {
- (*regs)[0] = tswapreg(env->regs[0]);
- (*regs)[1] = tswapreg(env->regs[1]);
- (*regs)[2] = tswapreg(env->regs[2]);
- (*regs)[3] = tswapreg(env->regs[3]);
- (*regs)[4] = tswapreg(env->regs[4]);
- (*regs)[5] = tswapreg(env->regs[5]);
- (*regs)[6] = tswapreg(env->regs[6]);
- (*regs)[7] = tswapreg(env->regs[7]);
- (*regs)[8] = tswapreg(env->regs[8]);
- (*regs)[9] = tswapreg(env->regs[9]);
- (*regs)[10] = tswapreg(env->regs[10]);
- (*regs)[11] = tswapreg(env->regs[11]);
- (*regs)[12] = tswapreg(env->regs[12]);
- (*regs)[13] = tswapreg(env->regs[13]);
- (*regs)[14] = tswapreg(env->regs[14]);
- (*regs)[15] = tswapreg(env->regs[15]);
- (*regs)[16] = tswapreg(cpsr_read((CPUARMState *)env));
- (*regs)[17] = tswapreg(env->regs[0]); /* XXX */
- }
- #define USE_ELF_CORE_DUMP
- #define ELF_EXEC_PAGESIZE 4096
- 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,
- };
- /* The commpage only exists for 32 bit kernels */
- #define TARGET_HAS_VALIDATE_GUEST_SPACE
- /* Return 1 if the proposed guest space is suitable for the guest.
- * Return 0 if the proposed guest space isn't suitable, but another
- * address space should be tried.
- * Return -1 if there is no way the proposed guest space can be
- * valid regardless of the base.
- * The guest code may leave a page mapped and populate it if the
- * address is suitable.
- */
- static int validate_guest_space(unsigned long guest_base,
- unsigned long guest_size)
- {
- unsigned long real_start, test_page_addr;
- /* We need to check that we can force a fault on access to the
- * commpage at 0xffff0fxx
- */
- test_page_addr = guest_base + (0xffff0f00 & qemu_host_page_mask);
- /* If the commpage lies within the already allocated guest space,
- * then there is no way we can allocate it.
- */
- if (test_page_addr >= guest_base
- && test_page_addr <= (guest_base + guest_size)) {
- return -1;
- }
- /* Note it needs to be writeable to let us initialise it */
- real_start = (unsigned long)
- mmap((void *)test_page_addr, qemu_host_page_size,
- PROT_READ | PROT_WRITE,
- MAP_ANONYMOUS | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
- /* If we can't map it then try another address */
- if (real_start == -1ul) {
- return 0;
- }
- if (real_start != test_page_addr) {
- /* OS didn't put the page where we asked - unmap and reject */
- munmap((void *)real_start, qemu_host_page_size);
- return 0;
- }
- /* Leave the page mapped
- * Populate it (mmap should have left it all 0'd)
- */
- /* Kernel helper versions */
- __put_user(5, (uint32_t *)g2h(0xffff0ffcul));
- /* Now it's populated make it RO */
- if (mprotect((void *)test_page_addr, qemu_host_page_size, PROT_READ)) {
- perror("Protecting guest commpage");
- exit(-1);
- }
- return 1; /* All good */
- }
- #define ELF_HWCAP get_elf_hwcap()
- static uint32_t get_elf_hwcap(void)
- {
- ARMCPU *cpu = ARM_CPU(thread_cpu);
- uint32_t 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)
- /* 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_VFP, ARM_HWCAP_ARM_VFP);
- GET_FEATURE(ARM_FEATURE_IWMMXT, ARM_HWCAP_ARM_IWMMXT);
- GET_FEATURE(ARM_FEATURE_THUMB2EE, ARM_HWCAP_ARM_THUMBEE);
- GET_FEATURE(ARM_FEATURE_NEON, ARM_HWCAP_ARM_NEON);
- GET_FEATURE(ARM_FEATURE_VFP3, ARM_HWCAP_ARM_VFPv3);
- GET_FEATURE(ARM_FEATURE_V6K, ARM_HWCAP_ARM_TLS);
- GET_FEATURE(ARM_FEATURE_VFP4, ARM_HWCAP_ARM_VFPv4);
- GET_FEATURE(ARM_FEATURE_ARM_DIV, ARM_HWCAP_ARM_IDIVA);
- GET_FEATURE(ARM_FEATURE_THUMB_DIV, ARM_HWCAP_ARM_IDIVT);
- /* All QEMU's VFPv3 CPUs have 32 registers, see VFP_DREG in translate.c.
- * Note that the ARM_HWCAP_ARM_VFPv3D16 bit is always the inverse of
- * ARM_HWCAP_ARM_VFPD32 (and so always clear for QEMU); it is unrelated
- * to our VFP_FP16 feature bit.
- */
- GET_FEATURE(ARM_FEATURE_VFP3, ARM_HWCAP_ARM_VFPD32);
- GET_FEATURE(ARM_FEATURE_LPAE, ARM_HWCAP_ARM_LPAE);
- #undef GET_FEATURE
- return hwcaps;
- }
- #else
- /* 64 bit ARM definitions */
- #define ELF_START_MMAP 0x80000000
- #define elf_check_arch(x) ((x) == ELF_MACHINE)
- #define ELF_ARCH ELF_MACHINE
- #define ELF_CLASS ELFCLASS64
- #define ELF_PLATFORM "aarch64"
- static inline void init_thread(struct target_pt_regs *regs,
- struct image_info *infop)
- {
- abi_long stack = infop->start_stack;
- memset(regs, 0, sizeof(*regs));
- regs->pc = infop->entry & ~0x3ULL;
- regs->sp = stack;
- }
- #define ELF_NREG 34
- typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
- static void elf_core_copy_regs(target_elf_gregset_t *regs,
- const CPUARMState *env)
- {
- int i;
- for (i = 0; i < 32; i++) {
- (*regs)[i] = tswapreg(env->xregs[i]);
- }
- (*regs)[32] = tswapreg(env->pc);
- (*regs)[33] = tswapreg(pstate_read((CPUARMState *)env));
- }
- #define USE_ELF_CORE_DUMP
- #define ELF_EXEC_PAGESIZE 4096
- enum {
- ARM_HWCAP_A64_FP = 1 << 0,
- ARM_HWCAP_A64_ASIMD = 1 << 1,
- ARM_HWCAP_A64_EVTSTRM = 1 << 2,
- ARM_HWCAP_A64_AES = 1 << 3,
- ARM_HWCAP_A64_PMULL = 1 << 4,
- ARM_HWCAP_A64_SHA1 = 1 << 5,
- ARM_HWCAP_A64_SHA2 = 1 << 6,
- ARM_HWCAP_A64_CRC32 = 1 << 7,
- };
- #define ELF_HWCAP get_elf_hwcap()
- static uint32_t get_elf_hwcap(void)
- {
- ARMCPU *cpu = ARM_CPU(thread_cpu);
- uint32_t hwcaps = 0;
- hwcaps |= ARM_HWCAP_A64_FP;
- hwcaps |= ARM_HWCAP_A64_ASIMD;
- /* probe for the extra features */
- #define GET_FEATURE(feat, hwcap) \
- do { if (arm_feature(&cpu->env, feat)) { hwcaps |= hwcap; } } while (0)
- GET_FEATURE(ARM_FEATURE_V8_AES, ARM_HWCAP_A64_PMULL);
- #undef GET_FEATURE
- return hwcaps;
- }
- #endif /* not TARGET_AARCH64 */
- #endif /* TARGET_ARM */
- #ifdef TARGET_UNICORE32
- #define ELF_START_MMAP 0x80000000
- #define elf_check_arch(x) ((x) == EM_UNICORE32)
- #define ELF_CLASS ELFCLASS32
- #define ELF_DATA ELFDATA2LSB
- #define ELF_ARCH EM_UNICORE32
- static inline void init_thread(struct target_pt_regs *regs,
- struct image_info *infop)
- {
- abi_long stack = infop->start_stack;
- memset(regs, 0, sizeof(*regs));
- regs->UC32_REG_asr = 0x10;
- regs->UC32_REG_pc = infop->entry & 0xfffffffe;
- regs->UC32_REG_sp = infop->start_stack;
- /* FIXME - what to for failure of get_user()? */
- get_user_ual(regs->UC32_REG_02, stack + 8); /* envp */
- get_user_ual(regs->UC32_REG_01, stack + 4); /* envp */
- /* XXX: it seems that r0 is zeroed after ! */
- regs->UC32_REG_00 = 0;
- }
- #define ELF_NREG 34
- typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
- static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUUniCore32State *env)
- {
- (*regs)[0] = env->regs[0];
- (*regs)[1] = env->regs[1];
- (*regs)[2] = env->regs[2];
- (*regs)[3] = env->regs[3];
- (*regs)[4] = env->regs[4];
- (*regs)[5] = env->regs[5];
- (*regs)[6] = env->regs[6];
- (*regs)[7] = env->regs[7];
- (*regs)[8] = env->regs[8];
- (*regs)[9] = env->regs[9];
- (*regs)[10] = env->regs[10];
- (*regs)[11] = env->regs[11];
- (*regs)[12] = env->regs[12];
- (*regs)[13] = env->regs[13];
- (*regs)[14] = env->regs[14];
- (*regs)[15] = env->regs[15];
- (*regs)[16] = env->regs[16];
- (*regs)[17] = env->regs[17];
- (*regs)[18] = env->regs[18];
- (*regs)[19] = env->regs[19];
- (*regs)[20] = env->regs[20];
- (*regs)[21] = env->regs[21];
- (*regs)[22] = env->regs[22];
- (*regs)[23] = env->regs[23];
- (*regs)[24] = env->regs[24];
- (*regs)[25] = env->regs[25];
- (*regs)[26] = env->regs[26];
- (*regs)[27] = env->regs[27];
- (*regs)[28] = env->regs[28];
- (*regs)[29] = env->regs[29];
- (*regs)[30] = env->regs[30];
- (*regs)[31] = env->regs[31];
- (*regs)[32] = cpu_asr_read((CPUUniCore32State *)env);
- (*regs)[33] = env->regs[0]; /* XXX */
- }
- #define USE_ELF_CORE_DUMP
- #define ELF_EXEC_PAGESIZE 4096
- #define ELF_HWCAP (UC32_HWCAP_CMOV | UC32_HWCAP_UCF64)
- #endif
- #ifdef TARGET_SPARC
- #ifdef TARGET_SPARC64
- #define ELF_START_MMAP 0x80000000
- #define ELF_HWCAP (HWCAP_SPARC_FLUSH | HWCAP_SPARC_STBAR | HWCAP_SPARC_SWAP \
- | HWCAP_SPARC_MULDIV | HWCAP_SPARC_V9)
- #ifndef TARGET_ABI32
- #define elf_check_arch(x) ( (x) == EM_SPARCV9 || (x) == EM_SPARC32PLUS )
- #else
- #define elf_check_arch(x) ( (x) == EM_SPARC32PLUS || (x) == EM_SPARC )
- #endif
- #define ELF_CLASS ELFCLASS64
- #define ELF_ARCH EM_SPARCV9
- #define STACK_BIAS 2047
- static inline void init_thread(struct target_pt_regs *regs,
- struct image_info *infop)
- {
- #ifndef TARGET_ABI32
- regs->tstate = 0;
- #endif
- regs->pc = infop->entry;
- regs->npc = regs->pc + 4;
- regs->y = 0;
- #ifdef TARGET_ABI32
- regs->u_regs[14] = infop->start_stack - 16 * 4;
- #else
- if (personality(infop->personality) == PER_LINUX32)
- regs->u_regs[14] = infop->start_stack - 16 * 4;
- else
- regs->u_regs[14] = infop->start_stack - 16 * 8 - STACK_BIAS;
- #endif
- }
- #else
- #define ELF_START_MMAP 0x80000000
- #define ELF_HWCAP (HWCAP_SPARC_FLUSH | HWCAP_SPARC_STBAR | HWCAP_SPARC_SWAP \
- | HWCAP_SPARC_MULDIV)
- #define elf_check_arch(x) ( (x) == EM_SPARC )
- #define ELF_CLASS ELFCLASS32
- #define ELF_ARCH EM_SPARC
- static inline void init_thread(struct target_pt_regs *regs,
- struct image_info *infop)
- {
- regs->psr = 0;
- regs->pc = infop->entry;
- regs->npc = regs->pc + 4;
- regs->y = 0;
- regs->u_regs[14] = infop->start_stack - 16 * 4;
- }
- #endif
- #endif
- #ifdef TARGET_PPC
- #define ELF_START_MMAP 0x80000000
- #if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
- #define elf_check_arch(x) ( (x) == EM_PPC64 )
- #define ELF_CLASS ELFCLASS64
- #else
- #define elf_check_arch(x) ( (x) == EM_PPC )
- #define ELF_CLASS ELFCLASS32
- #endif
- #define ELF_ARCH EM_PPC
- /* Feature masks for the Aux Vector Hardware Capabilities (AT_HWCAP).
- See arch/powerpc/include/asm/cputable.h. */
- enum {
- QEMU_PPC_FEATURE_32 = 0x80000000,
- QEMU_PPC_FEATURE_64 = 0x40000000,
- QEMU_PPC_FEATURE_601_INSTR = 0x20000000,
- QEMU_PPC_FEATURE_HAS_ALTIVEC = 0x10000000,
- QEMU_PPC_FEATURE_HAS_FPU = 0x08000000,
- QEMU_PPC_FEATURE_HAS_MMU = 0x04000000,
- QEMU_PPC_FEATURE_HAS_4xxMAC = 0x02000000,
- QEMU_PPC_FEATURE_UNIFIED_CACHE = 0x01000000,
- QEMU_PPC_FEATURE_HAS_SPE = 0x00800000,
- QEMU_PPC_FEATURE_HAS_EFP_SINGLE = 0x00400000,
- QEMU_PPC_FEATURE_HAS_EFP_DOUBLE = 0x00200000,
- QEMU_PPC_FEATURE_NO_TB = 0x00100000,
- QEMU_PPC_FEATURE_POWER4 = 0x00080000,
- QEMU_PPC_FEATURE_POWER5 = 0x00040000,
- QEMU_PPC_FEATURE_POWER5_PLUS = 0x00020000,
- QEMU_PPC_FEATURE_CELL = 0x00010000,
- QEMU_PPC_FEATURE_BOOKE = 0x00008000,
- QEMU_PPC_FEATURE_SMT = 0x00004000,
- QEMU_PPC_FEATURE_ICACHE_SNOOP = 0x00002000,
- QEMU_PPC_FEATURE_ARCH_2_05 = 0x00001000,
- QEMU_PPC_FEATURE_PA6T = 0x00000800,
- QEMU_PPC_FEATURE_HAS_DFP = 0x00000400,
- QEMU_PPC_FEATURE_POWER6_EXT = 0x00000200,
- QEMU_PPC_FEATURE_ARCH_2_06 = 0x00000100,
- QEMU_PPC_FEATURE_HAS_VSX = 0x00000080,
- QEMU_PPC_FEATURE_PSERIES_PERFMON_COMPAT = 0x00000040,
- QEMU_PPC_FEATURE_TRUE_LE = 0x00000002,
- QEMU_PPC_FEATURE_PPC_LE = 0x00000001,
- };
- #define ELF_HWCAP get_elf_hwcap()
- static uint32_t get_elf_hwcap(void)
- {
- PowerPCCPU *cpu = POWERPC_CPU(thread_cpu);
- uint32_t features = 0;
- /* We don't have to be terribly complete here; the high points are
- Altivec/FP/SPE support. Anything else is just a bonus. */
- #define GET_FEATURE(flag, feature) \
- do { if (cpu->env.insns_flags & flag) { features |= feature; } } while (0)
- GET_FEATURE(PPC_64B, QEMU_PPC_FEATURE_64);
- GET_FEATURE(PPC_FLOAT, QEMU_PPC_FEATURE_HAS_FPU);
- GET_FEATURE(PPC_ALTIVEC, QEMU_PPC_FEATURE_HAS_ALTIVEC);
- GET_FEATURE(PPC_SPE, QEMU_PPC_FEATURE_HAS_SPE);
- GET_FEATURE(PPC_SPE_SINGLE, QEMU_PPC_FEATURE_HAS_EFP_SINGLE);
- GET_FEATURE(PPC_SPE_DOUBLE, QEMU_PPC_FEATURE_HAS_EFP_DOUBLE);
- GET_FEATURE(PPC_BOOKE, QEMU_PPC_FEATURE_BOOKE);
- GET_FEATURE(PPC_405_MAC, QEMU_PPC_FEATURE_HAS_4xxMAC);
- #undef GET_FEATURE
- return features;
- }
- /*
- * The requirements here are:
- * - keep the final alignment of sp (sp & 0xf)
- * - make sure the 32-bit value at the first 16 byte aligned position of
- * AUXV is greater than 16 for glibc compatibility.
- * AT_IGNOREPPC is used for that.
- * - for compatibility with glibc ARCH_DLINFO must always be defined on PPC,
- * even if DLINFO_ARCH_ITEMS goes to zero or is undefined.
- */
- #define DLINFO_ARCH_ITEMS 5
- #define ARCH_DLINFO \
- do { \
- NEW_AUX_ENT(AT_DCACHEBSIZE, 0x20); \
- NEW_AUX_ENT(AT_ICACHEBSIZE, 0x20); \
- NEW_AUX_ENT(AT_UCACHEBSIZE, 0); \
- /* \
- * Now handle glibc compatibility. \
- */ \
- NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
- NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \
- } while (0)
- static inline void init_thread(struct target_pt_regs *_regs, struct image_info *infop)
- {
- _regs->gpr[1] = infop->start_stack;
- #if defined(TARGET_PPC64) && !defined(TARGET_ABI32)
- _regs->gpr[2] = ldq_raw(infop->entry + 8) + infop->load_bias;
- infop->entry = ldq_raw(infop->entry) + infop->load_bias;
- #endif
- _regs->nip = infop->entry;
- }
- /* See linux kernel: arch/powerpc/include/asm/elf.h. */
- #define ELF_NREG 48
- typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
- static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUPPCState *env)
- {
- int i;
- target_ulong ccr = 0;
- for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {
- (*regs)[i] = tswapreg(env->gpr[i]);
- }
- (*regs)[32] = tswapreg(env->nip);
- (*regs)[33] = tswapreg(env->msr);
- (*regs)[35] = tswapreg(env->ctr);
- (*regs)[36] = tswapreg(env->lr);
- (*regs)[37] = tswapreg(env->xer);
- for (i = 0; i < ARRAY_SIZE(env->crf); i++) {
- ccr |= env->crf[i] << (32 - ((i + 1) * 4));
- }
- (*regs)[38] = tswapreg(ccr);
- }
- #define USE_ELF_CORE_DUMP
- #define ELF_EXEC_PAGESIZE 4096
- #endif
- #ifdef TARGET_MIPS
- #define ELF_START_MMAP 0x80000000
- #define elf_check_arch(x) ( (x) == EM_MIPS )
- #ifdef TARGET_MIPS64
- #define ELF_CLASS ELFCLASS64
- #else
- #define ELF_CLASS ELFCLASS32
- #endif
- #define ELF_ARCH EM_MIPS
- static inline void init_thread(struct target_pt_regs *regs,
- struct image_info *infop)
- {
- regs->cp0_status = 2 << CP0St_KSU;
- regs->cp0_epc = infop->entry;
- regs->regs[29] = infop->start_stack;
- }
- /* See linux kernel: arch/mips/include/asm/elf.h. */
- #define ELF_NREG 45
- typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
- /* See linux kernel: arch/mips/include/asm/reg.h. */
- enum {
- #ifdef TARGET_MIPS64
- TARGET_EF_R0 = 0,
- #else
- TARGET_EF_R0 = 6,
- #endif
- TARGET_EF_R26 = TARGET_EF_R0 + 26,
- TARGET_EF_R27 = TARGET_EF_R0 + 27,
- TARGET_EF_LO = TARGET_EF_R0 + 32,
- TARGET_EF_HI = TARGET_EF_R0 + 33,
- TARGET_EF_CP0_EPC = TARGET_EF_R0 + 34,
- TARGET_EF_CP0_BADVADDR = TARGET_EF_R0 + 35,
- TARGET_EF_CP0_STATUS = TARGET_EF_R0 + 36,
- TARGET_EF_CP0_CAUSE = TARGET_EF_R0 + 37
- };
- /* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
- static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUMIPSState *env)
- {
- int i;
- for (i = 0; i < TARGET_EF_R0; i++) {
- (*regs)[i] = 0;
- }
- (*regs)[TARGET_EF_R0] = 0;
- for (i = 1; i < ARRAY_SIZE(env->active_tc.gpr); i++) {
- (*regs)[TARGET_EF_R0 + i] = tswapreg(env->active_tc.gpr[i]);
- }
- (*regs)[TARGET_EF_R26] = 0;
- (*regs)[TARGET_EF_R27] = 0;
- (*regs)[TARGET_EF_LO] = tswapreg(env->active_tc.LO[0]);
- (*regs)[TARGET_EF_HI] = tswapreg(env->active_tc.HI[0]);
- (*regs)[TARGET_EF_CP0_EPC] = tswapreg(env->active_tc.PC);
- (*regs)[TARGET_EF_CP0_BADVADDR] = tswapreg(env->CP0_BadVAddr);
- (*regs)[TARGET_EF_CP0_STATUS] = tswapreg(env->CP0_Status);
- (*regs)[TARGET_EF_CP0_CAUSE] = tswapreg(env->CP0_Cause);
- }
- #define USE_ELF_CORE_DUMP
- #define ELF_EXEC_PAGESIZE 4096
- #endif /* TARGET_MIPS */
- #ifdef TARGET_MICROBLAZE
- #define ELF_START_MMAP 0x80000000
- #define elf_check_arch(x) ( (x) == EM_MICROBLAZE || (x) == EM_MICROBLAZE_OLD)
- #define ELF_CLASS ELFCLASS32
- #define ELF_ARCH EM_MICROBLAZE
- static inline void init_thread(struct target_pt_regs *regs,
- struct image_info *infop)
- {
- regs->pc = infop->entry;
- regs->r1 = infop->start_stack;
- }
- #define ELF_EXEC_PAGESIZE 4096
- #define USE_ELF_CORE_DUMP
- #define ELF_NREG 38
- typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
- /* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */
- static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUMBState *env)
- {
- int i, pos = 0;
- for (i = 0; i < 32; i++) {
- (*regs)[pos++] = tswapreg(env->regs[i]);
- }
- for (i = 0; i < 6; i++) {
- (*regs)[pos++] = tswapreg(env->sregs[i]);
- }
- }
- #endif /* TARGET_MICROBLAZE */
- #ifdef TARGET_OPENRISC
- #define ELF_START_MMAP 0x08000000
- #define elf_check_arch(x) ((x) == EM_OPENRISC)
- #define ELF_ARCH EM_OPENRISC
- #define ELF_CLASS ELFCLASS32
- #define ELF_DATA ELFDATA2MSB
- static inline void init_thread(struct target_pt_regs *regs,
- struct image_info *infop)
- {
- regs->pc = infop->entry;
- regs->gpr[1] = infop->start_stack;
- }
- #define USE_ELF_CORE_DUMP
- #define ELF_EXEC_PAGESIZE 8192
- /* See linux kernel arch/openrisc/include/asm/elf.h. */
- #define ELF_NREG 34 /* gprs and pc, sr */
- typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
- static void elf_core_copy_regs(target_elf_gregset_t *regs,
- const CPUOpenRISCState *env)
- {
- int i;
- for (i = 0; i < 32; i++) {
- (*regs)[i] = tswapreg(env->gpr[i]);
- }
- (*regs)[32] = tswapreg(env->pc);
- (*regs)[33] = tswapreg(env->sr);
- }
- #define ELF_HWCAP 0
- #define ELF_PLATFORM NULL
- #endif /* TARGET_OPENRISC */
- #ifdef TARGET_SH4
- #define ELF_START_MMAP 0x80000000
- #define elf_check_arch(x) ( (x) == EM_SH )
- #define ELF_CLASS ELFCLASS32
- #define ELF_ARCH EM_SH
- static inline void init_thread(struct target_pt_regs *regs,
- struct image_info *infop)
- {
- /* Check other registers XXXXX */
- regs->pc = infop->entry;
- regs->regs[15] = infop->start_stack;
- }
- /* See linux kernel: arch/sh/include/asm/elf.h. */
- #define ELF_NREG 23
- typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
- /* See linux kernel: arch/sh/include/asm/ptrace.h. */
- enum {
- TARGET_REG_PC = 16,
- TARGET_REG_PR = 17,
- TARGET_REG_SR = 18,
- TARGET_REG_GBR = 19,
- TARGET_REG_MACH = 20,
- TARGET_REG_MACL = 21,
- TARGET_REG_SYSCALL = 22
- };
- static inline void elf_core_copy_regs(target_elf_gregset_t *regs,
- const CPUSH4State *env)
- {
- int i;
- for (i = 0; i < 16; i++) {
- (*regs[i]) = tswapreg(env->gregs[i]);
- }
- (*regs)[TARGET_REG_PC] = tswapreg(env->pc);
- (*regs)[TARGET_REG_PR] = tswapreg(env->pr);
- (*regs)[TARGET_REG_SR] = tswapreg(env->sr);
- (*regs)[TARGET_REG_GBR] = tswapreg(env->gbr);
- (*regs)[TARGET_REG_MACH] = tswapreg(env->mach);
- (*regs)[TARGET_REG_MACL] = tswapreg(env->macl);
- (*regs)[TARGET_REG_SYSCALL] = 0; /* FIXME */
- }
- #define USE_ELF_CORE_DUMP
- #define ELF_EXEC_PAGESIZE 4096
- #endif
- #ifdef TARGET_CRIS
- #define ELF_START_MMAP 0x80000000
- #define elf_check_arch(x) ( (x) == EM_CRIS )
- #define ELF_CLASS ELFCLASS32
- #define ELF_ARCH EM_CRIS
- static inline void init_thread(struct target_pt_regs *regs,
- struct image_info *infop)
- {
- regs->erp = infop->entry;
- }
- #define ELF_EXEC_PAGESIZE 8192
- #endif
- #ifdef TARGET_M68K
- #define ELF_START_MMAP 0x80000000
- #define elf_check_arch(x) ( (x) == EM_68K )
- #define ELF_CLASS ELFCLASS32
- #define ELF_ARCH EM_68K
- /* ??? Does this need to do anything?
- #define ELF_PLAT_INIT(_r) */
- static inline void init_thread(struct target_pt_regs *regs,
- struct image_info *infop)
- {
- regs->usp = infop->start_stack;
- regs->sr = 0;
- regs->pc = infop->entry;
- }
- /* See linux kernel: arch/m68k/include/asm/elf.h. */
- #define ELF_NREG 20
- typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
- static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUM68KState *env)
- {
- (*regs)[0] = tswapreg(env->dregs[1]);
- (*regs)[1] = tswapreg(env->dregs[2]);
- (*regs)[2] = tswapreg(env->dregs[3]);
- (*regs)[3] = tswapreg(env->dregs[4]);
- (*regs)[4] = tswapreg(env->dregs[5]);
- (*regs)[5] = tswapreg(env->dregs[6]);
- (*regs)[6] = tswapreg(env->dregs[7]);
- (*regs)[7] = tswapreg(env->aregs[0]);
- (*regs)[8] = tswapreg(env->aregs[1]);
- (*regs)[9] = tswapreg(env->aregs[2]);
- (*regs)[10] = tswapreg(env->aregs[3]);
- (*regs)[11] = tswapreg(env->aregs[4]);
- (*regs)[12] = tswapreg(env->aregs[5]);
- (*regs)[13] = tswapreg(env->aregs[6]);
- (*regs)[14] = tswapreg(env->dregs[0]);
- (*regs)[15] = tswapreg(env->aregs[7]);
- (*regs)[16] = tswapreg(env->dregs[0]); /* FIXME: orig_d0 */
- (*regs)[17] = tswapreg(env->sr);
- (*regs)[18] = tswapreg(env->pc);
- (*regs)[19] = 0; /* FIXME: regs->format | regs->vector */
- }
- #define USE_ELF_CORE_DUMP
- #define ELF_EXEC_PAGESIZE 8192
- #endif
- #ifdef TARGET_ALPHA
- #define ELF_START_MMAP (0x30000000000ULL)
- #define elf_check_arch(x) ( (x) == ELF_ARCH )
- #define ELF_CLASS ELFCLASS64
- #define ELF_ARCH EM_ALPHA
- static inline void init_thread(struct target_pt_regs *regs,
- struct image_info *infop)
- {
- regs->pc = infop->entry;
- regs->ps = 8;
- regs->usp = infop->start_stack;
- }
- #define ELF_EXEC_PAGESIZE 8192
- #endif /* TARGET_ALPHA */
- #ifdef TARGET_S390X
- #define ELF_START_MMAP (0x20000000000ULL)
- #define elf_check_arch(x) ( (x) == ELF_ARCH )
- #define ELF_CLASS ELFCLASS64
- #define ELF_DATA ELFDATA2MSB
- #define ELF_ARCH EM_S390
- static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
- {
- regs->psw.addr = infop->entry;
- regs->psw.mask = PSW_MASK_64 | PSW_MASK_32;
- regs->gprs[15] = infop->start_stack;
- }
- #endif /* TARGET_S390X */
- #ifndef ELF_PLATFORM
- #define ELF_PLATFORM (NULL)
- #endif
- #ifndef ELF_HWCAP
- #define ELF_HWCAP 0
- #endif
- #ifdef TARGET_ABI32
- #undef ELF_CLASS
- #define ELF_CLASS ELFCLASS32
- #undef bswaptls
- #define bswaptls(ptr) bswap32s(ptr)
- #endif
- #include "elf.h"
- struct exec
- {
- unsigned int a_info; /* Use macros N_MAGIC, etc for access */
- unsigned int a_text; /* length of text, in bytes */
- unsigned int a_data; /* length of data, in bytes */
- unsigned int a_bss; /* length of uninitialized data area, in bytes */
- unsigned int a_syms; /* length of symbol table data in file, in bytes */
- unsigned int a_entry; /* start address */
- unsigned int a_trsize; /* length of relocation info for text, in bytes */
- unsigned int a_drsize; /* length of relocation info for data, in bytes */
- };
- #define N_MAGIC(exec) ((exec).a_info & 0xffff)
- #define OMAGIC 0407
- #define NMAGIC 0410
- #define ZMAGIC 0413
- #define QMAGIC 0314
- /* Necessary parameters */
- #define TARGET_ELF_EXEC_PAGESIZE TARGET_PAGE_SIZE
- #define TARGET_ELF_PAGESTART(_v) ((_v) & ~(unsigned long)(TARGET_ELF_EXEC_PAGESIZE-1))
- #define TARGET_ELF_PAGEOFFSET(_v) ((_v) & (TARGET_ELF_EXEC_PAGESIZE-1))
- #define DLINFO_ITEMS 14
- static inline void memcpy_fromfs(void * to, const void * from, unsigned long n)
- {
- memcpy(to, from, n);
- }
- #ifdef BSWAP_NEEDED
- static void bswap_ehdr(struct elfhdr *ehdr)
- {
- bswap16s(&ehdr->e_type); /* Object file type */
- bswap16s(&ehdr->e_machine); /* Architecture */
- bswap32s(&ehdr->e_version); /* Object file version */
- bswaptls(&ehdr->e_entry); /* Entry point virtual address */
- bswaptls(&ehdr->e_phoff); /* Program header table file offset */
- bswaptls(&ehdr->e_shoff); /* Section header table file offset */
- bswap32s(&ehdr->e_flags); /* Processor-specific flags */
- bswap16s(&ehdr->e_ehsize); /* ELF header size in bytes */
- bswap16s(&ehdr->e_phentsize); /* Program header table entry size */
- bswap16s(&ehdr->e_phnum); /* Program header table entry count */
- bswap16s(&ehdr->e_shentsize); /* Section header table entry size */
- bswap16s(&ehdr->e_shnum); /* Section header table entry count */
- bswap16s(&ehdr->e_shstrndx); /* Section header string table index */
- }
- static void bswap_phdr(struct elf_phdr *phdr, int phnum)
- {
- int i;
- for (i = 0; i < phnum; ++i, ++phdr) {
- bswap32s(&phdr->p_type); /* Segment type */
- bswap32s(&phdr->p_flags); /* Segment flags */
- bswaptls(&phdr->p_offset); /* Segment file offset */
- bswaptls(&phdr->p_vaddr); /* Segment virtual address */
- bswaptls(&phdr->p_paddr); /* Segment physical address */
- bswaptls(&phdr->p_filesz); /* Segment size in file */
- bswaptls(&phdr->p_memsz); /* Segment size in memory */
- bswaptls(&phdr->p_align); /* Segment alignment */
- }
- }
- static void bswap_shdr(struct elf_shdr *shdr, int shnum)
- {
- int i;
- for (i = 0; i < shnum; ++i, ++shdr) {
- bswap32s(&shdr->sh_name);
- bswap32s(&shdr->sh_type);
- bswaptls(&shdr->sh_flags);
- bswaptls(&shdr->sh_addr);
- bswaptls(&shdr->sh_offset);
- bswaptls(&shdr->sh_size);
- bswap32s(&shdr->sh_link);
- bswap32s(&shdr->sh_info);
- bswaptls(&shdr->sh_addralign);
- bswaptls(&shdr->sh_entsize);
- }
- }
- static void bswap_sym(struct elf_sym *sym)
- {
- bswap32s(&sym->st_name);
- bswaptls(&sym->st_value);
- bswaptls(&sym->st_size);
- bswap16s(&sym->st_shndx);
- }
- #else
- static inline void bswap_ehdr(struct elfhdr *ehdr) { }
- static inline void bswap_phdr(struct elf_phdr *phdr, int phnum) { }
- static inline void bswap_shdr(struct elf_shdr *shdr, int shnum) { }
- static inline void bswap_sym(struct elf_sym *sym) { }
- #endif
- #ifdef USE_ELF_CORE_DUMP
- static int elf_core_dump(int, const CPUArchState *);
- #endif /* USE_ELF_CORE_DUMP */
- static void load_symbols(struct elfhdr *hdr, int fd, abi_ulong load_bias);
- /* Verify the portions of EHDR within E_IDENT for the target.
- This can be performed before bswapping the entire header. */
- static bool elf_check_ident(struct elfhdr *ehdr)
- {
- return (ehdr->e_ident[EI_MAG0] == ELFMAG0
- && ehdr->e_ident[EI_MAG1] == ELFMAG1
- && ehdr->e_ident[EI_MAG2] == ELFMAG2
- && ehdr->e_ident[EI_MAG3] == ELFMAG3
- && ehdr->e_ident[EI_CLASS] == ELF_CLASS
- && ehdr->e_ident[EI_DATA] == ELF_DATA
- && ehdr->e_ident[EI_VERSION] == EV_CURRENT);
- }
- /* Verify the portions of EHDR outside of E_IDENT for the target.
- This has to wait until after bswapping the header. */
- static bool elf_check_ehdr(struct elfhdr *ehdr)
- {
- return (elf_check_arch(ehdr->e_machine)
- && ehdr->e_ehsize == sizeof(struct elfhdr)
- && ehdr->e_phentsize == sizeof(struct elf_phdr)
- && ehdr->e_shentsize == sizeof(struct elf_shdr)
- && (ehdr->e_type == ET_EXEC || ehdr->e_type == ET_DYN));
- }
- /*
- * 'copy_elf_strings()' copies argument/envelope strings from user
- * memory to free pages in kernel mem. These are in a format ready
- * to be put directly into the top of new user memory.
- *
- */
- static abi_ulong copy_elf_strings(int argc,char ** argv, void **page,
- abi_ulong p)
- {
- char *tmp, *tmp1, *pag = NULL;
- int len, offset = 0;
- if (!p) {
- return 0; /* bullet-proofing */
- }
- while (argc-- > 0) {
- tmp = argv[argc];
- if (!tmp) {
- fprintf(stderr, "VFS: argc is wrong");
- exit(-1);
- }
- tmp1 = tmp;
- while (*tmp++);
- len = tmp - tmp1;
- if (p < len) { /* this shouldn't happen - 128kB */
- return 0;
- }
- while (len) {
- --p; --tmp; --len;
- if (--offset < 0) {
- offset = p % TARGET_PAGE_SIZE;
- pag = (char *)page[p/TARGET_PAGE_SIZE];
- if (!pag) {
- pag = g_try_malloc0(TARGET_PAGE_SIZE);
- page[p/TARGET_PAGE_SIZE] = pag;
- if (!pag)
- return 0;
- }
- }
- if (len == 0 || offset == 0) {
- *(pag + offset) = *tmp;
- }
- else {
- int bytes_to_copy = (len > offset) ? offset : len;
- tmp -= bytes_to_copy;
- p -= bytes_to_copy;
- offset -= bytes_to_copy;
- len -= bytes_to_copy;
- memcpy_fromfs(pag + offset, tmp, bytes_to_copy + 1);
- }
- }
- }
- return p;
- }
- static abi_ulong setup_arg_pages(abi_ulong p, struct linux_binprm *bprm,
- struct image_info *info)
- {
- abi_ulong stack_base, size, error, guard;
- int i;
- /* Create enough stack to hold everything. If we don't use
- it for args, we'll use it for something else. */
- size = guest_stack_size;
- if (size < MAX_ARG_PAGES*TARGET_PAGE_SIZE) {
- size = MAX_ARG_PAGES*TARGET_PAGE_SIZE;
- }
- guard = TARGET_PAGE_SIZE;
- if (guard < qemu_real_host_page_size) {
- guard = qemu_real_host_page_size;
- }
- error = target_mmap(0, size + guard, PROT_READ | PROT_WRITE,
- MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
- if (error == -1) {
- perror("mmap stack");
- exit(-1);
- }
- /* We reserve one extra page at the top of the stack as guard. */
- target_mprotect(error, guard, PROT_NONE);
- info->stack_limit = error + guard;
- stack_base = info->stack_limit + size - MAX_ARG_PAGES*TARGET_PAGE_SIZE;
- p += stack_base;
- for (i = 0 ; i < MAX_ARG_PAGES ; i++) {
- if (bprm->page[i]) {
- info->rss++;
- /* FIXME - check return value of memcpy_to_target() for failure */
- memcpy_to_target(stack_base, bprm->page[i], TARGET_PAGE_SIZE);
- g_free(bprm->page[i]);
- }
- stack_base += TARGET_PAGE_SIZE;
- }
- return p;
- }
- /* Map and zero the bss. We need to explicitly zero any fractional pages
- after the data section (i.e. bss). */
- static void zero_bss(abi_ulong elf_bss, abi_ulong last_bss, int prot)
- {
- uintptr_t host_start, host_map_start, host_end;
- last_bss = TARGET_PAGE_ALIGN(last_bss);
- /* ??? There is confusion between qemu_real_host_page_size and
- qemu_host_page_size here and elsewhere in target_mmap, which
- may lead to the end of the data section mapping from the file
- not being mapped. At least there was an explicit test and
- comment for that here, suggesting that "the file size must
- be known". The comment probably pre-dates the introduction
- of the fstat system call in target_mmap which does in fact
- find out the size. What isn't clear is if the workaround
- here is still actually needed. For now, continue with it,
- but merge it with the "normal" mmap that would allocate the bss. */
- host_start = (uintptr_t) g2h(elf_bss);
- host_end = (uintptr_t) g2h(last_bss);
- host_map_start = (host_start + qemu_real_host_page_size - 1);
- host_map_start &= -qemu_real_host_page_size;
- if (host_map_start < host_end) {
- void *p = mmap((void *)host_map_start, host_end - host_map_start,
- prot, MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
- if (p == MAP_FAILED) {
- perror("cannot mmap brk");
- exit(-1);
- }
- /* Since we didn't use target_mmap, make sure to record
- the validity of the pages with qemu. */
- page_set_flags(elf_bss & TARGET_PAGE_MASK, last_bss, prot|PAGE_VALID);
- }
- if (host_start < host_map_start) {
- memset((void *)host_start, 0, host_map_start - host_start);
- }
- }
- #ifdef CONFIG_USE_FDPIC
- static abi_ulong loader_build_fdpic_loadmap(struct image_info *info, abi_ulong sp)
- {
- uint16_t n;
- struct elf32_fdpic_loadseg *loadsegs = info->loadsegs;
- /* elf32_fdpic_loadseg */
- n = info->nsegs;
- while (n--) {
- sp -= 12;
- put_user_u32(loadsegs[n].addr, sp+0);
- put_user_u32(loadsegs[n].p_vaddr, sp+4);
- put_user_u32(loadsegs[n].p_memsz, sp+8);
- }
- /* elf32_fdpic_loadmap */
- sp -= 4;
- put_user_u16(0, sp+0); /* version */
- put_user_u16(info->nsegs, sp+2); /* nsegs */
- info->personality = PER_LINUX_FDPIC;
- info->loadmap_addr = sp;
- return sp;
- }
- #endif
- static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc,
- struct elfhdr *exec,
- struct image_info *info,
- struct image_info *interp_info)
- {
- abi_ulong sp;
- abi_ulong sp_auxv;
- int size;
- int i;
- abi_ulong u_rand_bytes;
- uint8_t k_rand_bytes[16];
- abi_ulong u_platform;
- const char *k_platform;
- const int n = sizeof(elf_addr_t);
- sp = p;
- #ifdef CONFIG_USE_FDPIC
- /* Needs to be before we load the env/argc/... */
- if (elf_is_fdpic(exec)) {
- /* Need 4 byte alignment for these structs */
- sp &= ~3;
- sp = loader_build_fdpic_loadmap(info, sp);
- info->other_info = interp_info;
- if (interp_info) {
- interp_info->other_info = info;
- sp = loader_build_fdpic_loadmap(interp_info, sp);
- }
- }
- #endif
- u_platform = 0;
- k_platform = ELF_PLATFORM;
- if (k_platform) {
- size_t len = strlen(k_platform) + 1;
- sp -= (len + n - 1) & ~(n - 1);
- u_platform = sp;
- /* FIXME - check return value of memcpy_to_target() for failure */
- memcpy_to_target(sp, k_platform, len);
- }
- /*
- * Generate 16 random bytes for userspace PRNG seeding (not
- * cryptically secure but it's not the aim of QEMU).
- */
- srand((unsigned int) time(NULL));
- for (i = 0; i < 16; i++) {
- k_rand_bytes[i] = rand();
- }
- sp -= 16;
- u_rand_bytes = sp;
- /* FIXME - check return value of memcpy_to_target() for failure */
- memcpy_to_target(sp, k_rand_bytes, 16);
- /*
- * Force 16 byte _final_ alignment here for generality.
- */
- sp = sp &~ (abi_ulong)15;
- size = (DLINFO_ITEMS + 1) * 2;
- if (k_platform)
- size += 2;
- #ifdef DLINFO_ARCH_ITEMS
- size += DLINFO_ARCH_ITEMS * 2;
- #endif
- size += envc + argc + 2;
- size += 1; /* argc itself */
- size *= n;
- if (size & 15)
- sp -= 16 - (size & 15);
- /* This is correct because Linux defines
- * elf_addr_t as Elf32_Off / Elf64_Off
- */
- #define NEW_AUX_ENT(id, val) do { \
- sp -= n; put_user_ual(val, sp); \
- sp -= n; put_user_ual(id, sp); \
- } while(0)
- sp_auxv = sp;
- NEW_AUX_ENT (AT_NULL, 0);
- /* There must be exactly DLINFO_ITEMS entries here. */
- NEW_AUX_ENT(AT_PHDR, (abi_ulong)(info->load_addr + exec->e_phoff));
- NEW_AUX_ENT(AT_PHENT, (abi_ulong)(sizeof (struct elf_phdr)));
- NEW_AUX_ENT(AT_PHNUM, (abi_ulong)(exec->e_phnum));
- NEW_AUX_ENT(AT_PAGESZ, (abi_ulong)(TARGET_PAGE_SIZE));
- NEW_AUX_ENT(AT_BASE, (abi_ulong)(interp_info ? interp_info->load_addr : 0));
- NEW_AUX_ENT(AT_FLAGS, (abi_ulong)0);
- NEW_AUX_ENT(AT_ENTRY, info->entry);
- NEW_AUX_ENT(AT_UID, (abi_ulong) getuid());
- NEW_AUX_ENT(AT_EUID, (abi_ulong) geteuid());
- NEW_AUX_ENT(AT_GID, (abi_ulong) getgid());
- NEW_AUX_ENT(AT_EGID, (abi_ulong) getegid());
- NEW_AUX_ENT(AT_HWCAP, (abi_ulong) ELF_HWCAP);
- NEW_AUX_ENT(AT_CLKTCK, (abi_ulong) sysconf(_SC_CLK_TCK));
- NEW_AUX_ENT(AT_RANDOM, (abi_ulong) u_rand_bytes);
- if (k_platform)
- NEW_AUX_ENT(AT_PLATFORM, u_platform);
- #ifdef ARCH_DLINFO
- /*
- * ARCH_DLINFO must come last so platform specific code can enforce
- * special alignment requirements on the AUXV if necessary (eg. PPC).
- */
- ARCH_DLINFO;
- #endif
- #undef NEW_AUX_ENT
- info->saved_auxv = sp;
- info->auxv_len = sp_auxv - sp;
- sp = loader_build_argptr(envc, argc, sp, p, 0);
- return sp;
- }
- #ifndef TARGET_HAS_VALIDATE_GUEST_SPACE
- /* If the guest doesn't have a validation function just agree */
- static int validate_guest_space(unsigned long guest_base,
- unsigned long guest_size)
- {
- return 1;
- }
- #endif
- unsigned long init_guest_space(unsigned long host_start,
- unsigned long host_size,
- unsigned long guest_start,
- bool fixed)
- {
- unsigned long current_start, real_start;
- int flags;
- assert(host_start || host_size);
- /* If just a starting address is given, then just verify that
- * address. */
- if (host_start && !host_size) {
- if (validate_guest_space(host_start, host_size) == 1) {
- return host_start;
- } else {
- return (unsigned long)-1;
- }
- }
- /* Setup the initial flags and start address. */
- current_start = host_start & qemu_host_page_mask;
- flags = MAP_ANONYMOUS | MAP_PRIVATE | MAP_NORESERVE;
- if (fixed) {
- flags |= MAP_FIXED;
- }
- /* Otherwise, a non-zero size region of memory needs to be mapped
- * and validated. */
- while (1) {
- unsigned long real_size = host_size;
- /* Do not use mmap_find_vma here because that is limited to the
- * guest address space. We are going to make the
- * guest address space fit whatever we're given.
- */
- real_start = (unsigned long)
- mmap((void *)current_start, host_size, PROT_NONE, flags, -1, 0);
- if (real_start == (unsigned long)-1) {
- return (unsigned long)-1;
- }
- /* Ensure the address is properly aligned. */
- if (real_start & ~qemu_host_page_mask) {
- munmap((void *)real_start, host_size);
- real_size = host_size + qemu_host_page_size;
- real_start = (unsigned long)
- mmap((void *)real_start, real_size, PROT_NONE, flags, -1, 0);
- if (real_start == (unsigned long)-1) {
- return (unsigned long)-1;
- }
- real_start = HOST_PAGE_ALIGN(real_start);
- }
- /* Check to see if the address is valid. */
- if (!host_start || real_start == current_start) {
- int valid = validate_guest_space(real_start - guest_start,
- real_size);
- if (valid == 1) {
- break;
- } else if (valid == -1) {
- return (unsigned long)-1;
- }
- /* valid == 0, so try again. */
- }
- /* That address didn't work. Unmap and try a different one.
- * The address the host picked because is typically right at
- * the top of the host address space and leaves the guest with
- * no usable address space. Resort to a linear search. We
- * already compensated for mmap_min_addr, so this should not
- * happen often. Probably means we got unlucky and host
- * address space randomization put a shared library somewhere
- * inconvenient.
- */
- munmap((void *)real_start, host_size);
- current_start += qemu_host_page_size;
- if (host_start == current_start) {
- /* Theoretically possible if host doesn't have any suitably
- * aligned areas. Normally the first mmap will fail.
- */
- return (unsigned long)-1;
- }
- }
- qemu_log("Reserved 0x%lx bytes of guest address space\n", host_size);
- return real_start;
- }
- static void probe_guest_base(const char *image_name,
- abi_ulong loaddr, abi_ulong hiaddr)
- {
- /* Probe for a suitable guest base address, if the user has not set
- * it explicitly, and set guest_base appropriately.
- * In case of error we will print a suitable message and exit.
- */
- #if defined(CONFIG_USE_GUEST_BASE)
- const char *errmsg;
- if (!have_guest_base && !reserved_va) {
- unsigned long host_start, real_start, host_size;
- /* Round addresses to page boundaries. */
- loaddr &= qemu_host_page_mask;
- hiaddr = HOST_PAGE_ALIGN(hiaddr);
- if (loaddr < mmap_min_addr) {
- host_start = HOST_PAGE_ALIGN(mmap_min_addr);
- } else {
- host_start = loaddr;
- if (host_start != loaddr) {
- errmsg = "Address overflow loading ELF binary";
- goto exit_errmsg;
- }
- }
- host_size = hiaddr - loaddr;
- /* Setup the initial guest memory space with ranges gleaned from
- * the ELF image that is being loaded.
- */
- real_start = init_guest_space(host_start, host_size, loaddr, false);
- if (real_start == (unsigned long)-1) {
- errmsg = "Unable to find space for application";
- goto exit_errmsg;
- }
- guest_base = real_start - loaddr;
- qemu_log("Relocating guest address space from 0x"
- TARGET_ABI_FMT_lx " to 0x%lx\n",
- loaddr, real_start);
- }
- return;
- exit_errmsg:
- fprintf(stderr, "%s: %s\n", image_name, errmsg);
- exit(-1);
- #endif
- }
- /* Load an ELF image into the address space.
- IMAGE_NAME is the filename of the image, to use in error messages.
- IMAGE_FD is the open file descriptor for the image.
- BPRM_BUF is a copy of the beginning of the file; this of course
- contains the elf file header at offset 0. It is assumed that this
- buffer is sufficiently aligned to present no problems to the host
- in accessing data at aligned offsets within the buffer.
- On return: INFO values will be filled in, as necessary or available. */
- static void load_elf_image(const char *image_name, int image_fd,
- struct image_info *info, char **pinterp_name,
- char bprm_buf[BPRM_BUF_SIZE])
- {
- struct elfhdr *ehdr = (struct elfhdr *)bprm_buf;
- struct elf_phdr *phdr;
- abi_ulong load_addr, load_bias, loaddr, hiaddr, error;
- int i, retval;
- const char *errmsg;
- /* First of all, some simple consistency checks */
- errmsg = "Invalid ELF image for this architecture";
- if (!elf_check_ident(ehdr)) {
- goto exit_errmsg;
- }
- bswap_ehdr(ehdr);
- if (!elf_check_ehdr(ehdr)) {
- goto exit_errmsg;
- }
- i = ehdr->e_phnum * sizeof(struct elf_phdr);
- if (ehdr->e_phoff + i <= BPRM_BUF_SIZE) {
- phdr = (struct elf_phdr *)(bprm_buf + ehdr->e_phoff);
- } else {
- phdr = (struct elf_phdr *) alloca(i);
- retval = pread(image_fd, phdr, i, ehdr->e_phoff);
- if (retval != i) {
- goto exit_read;
- }
- }
- bswap_phdr(phdr, ehdr->e_phnum);
- #ifdef CONFIG_USE_FDPIC
- info->nsegs = 0;
- info->pt_dynamic_addr = 0;
- #endif
- /* Find the maximum size of the image and allocate an appropriate
- amount of memory to handle that. */
- loaddr = -1, hiaddr = 0;
- for (i = 0; i < ehdr->e_phnum; ++i) {
- if (phdr[i].p_type == PT_LOAD) {
- abi_ulong a = phdr[i].p_vaddr;
- if (a < loaddr) {
- loaddr = a;
- }
- a += phdr[i].p_memsz;
- if (a > hiaddr) {
- hiaddr = a;
- }
- #ifdef CONFIG_USE_FDPIC
- ++info->nsegs;
- #endif
- }
- }
- load_addr = loaddr;
- if (ehdr->e_type == ET_DYN) {
- /* The image indicates that it can be loaded anywhere. Find a
- location that can hold the memory space required. If the
- image is pre-linked, LOADDR will be non-zero. Since we do
- not supply MAP_FIXED here we'll use that address if and
- only if it remains available. */
- load_addr = target_mmap(loaddr, hiaddr - loaddr, PROT_NONE,
- MAP_PRIVATE | MAP_ANON | MAP_NORESERVE,
- -1, 0);
- if (load_addr == -1) {
- goto exit_perror;
- }
- } else if (pinterp_name != NULL) {
- /* This is the main executable. Make sure that the low
- address does not conflict with MMAP_MIN_ADDR or the
- QEMU application itself. */
- probe_guest_base(image_name, loaddr, hiaddr);
- }
- load_bias = load_addr - loaddr;
- #ifdef CONFIG_USE_FDPIC
- {
- struct elf32_fdpic_loadseg *loadsegs = info->loadsegs =
- g_malloc(sizeof(*loadsegs) * info->nsegs);
- for (i = 0; i < ehdr->e_phnum; ++i) {
- switch (phdr[i].p_type) {
- case PT_DYNAMIC:
- info->pt_dynamic_addr = phdr[i].p_vaddr + load_bias;
- break;
- case PT_LOAD:
- loadsegs->addr = phdr[i].p_vaddr + load_bias;
- loadsegs->p_vaddr = phdr[i].p_vaddr;
- loadsegs->p_memsz = phdr[i].p_memsz;
- ++loadsegs;
- break;
- }
- }
- }
- #endif
- info->load_bias = load_bias;
- info->load_addr = load_addr;
- info->entry = ehdr->e_entry + load_bias;
- info->start_code = -1;
- info->end_code = 0;
- info->start_data = -1;
- info->end_data = 0;
- info->brk = 0;
- info->elf_flags = ehdr->e_flags;
- for (i = 0; i < ehdr->e_phnum; i++) {
- struct elf_phdr *eppnt = phdr + i;
- if (eppnt->p_type == PT_LOAD) {
- abi_ulong vaddr, vaddr_po, vaddr_ps, vaddr_ef, vaddr_em;
- int elf_prot = 0;
- if (eppnt->p_flags & PF_R) elf_prot = PROT_READ;
- if (eppnt->p_flags & PF_W) elf_prot |= PROT_WRITE;
- if (eppnt->p_flags & PF_X) elf_prot |= PROT_EXEC;
- vaddr = load_bias + eppnt->p_vaddr;
- vaddr_po = TARGET_ELF_PAGEOFFSET(vaddr);
- vaddr_ps = TARGET_ELF_PAGESTART(vaddr);
- error = target_mmap(vaddr_ps, eppnt->p_filesz + vaddr_po,
- elf_prot, MAP_PRIVATE | MAP_FIXED,
- image_fd, eppnt->p_offset - vaddr_po);
- if (error == -1) {
- goto exit_perror;
- }
- vaddr_ef = vaddr + eppnt->p_filesz;
- vaddr_em = vaddr + eppnt->p_memsz;
- /* If the load segment requests extra zeros (e.g. bss), map it. */
- if (vaddr_ef < vaddr_em) {
- zero_bss(vaddr_ef, vaddr_em, elf_prot);
- }
- /* Find the full program boundaries. */
- if (elf_prot & PROT_EXEC) {
- if (vaddr < info->start_code) {
- info->start_code = vaddr;
- }
- if (vaddr_ef > info->end_code) {
- info->end_code = vaddr_ef;
- }
- }
- if (elf_prot & PROT_WRITE) {
- if (vaddr < info->start_data) {
- info->start_data = vaddr;
- }
- if (vaddr_ef > info->end_data) {
- info->end_data = vaddr_ef;
- }
- if (vaddr_em > info->brk) {
- info->brk = vaddr_em;
- }
- }
- } else if (eppnt->p_type == PT_INTERP && pinterp_name) {
- char *interp_name;
- if (*pinterp_name) {
- errmsg = "Multiple PT_INTERP entries";
- goto exit_errmsg;
- }
- interp_name = malloc(eppnt->p_filesz);
- if (!interp_name) {
- goto exit_perror;
- }
- if (eppnt->p_offset + eppnt->p_filesz <= BPRM_BUF_SIZE) {
- memcpy(interp_name, bprm_buf + eppnt->p_offset,
- eppnt->p_filesz);
- } else {
- retval = pread(image_fd, interp_name, eppnt->p_filesz,
- eppnt->p_offset);
- if (retval != eppnt->p_filesz) {
- goto exit_perror;
- }
- }
- if (interp_name[eppnt->p_filesz - 1] != 0) {
- errmsg = "Invalid PT_INTERP entry";
- goto exit_errmsg;
- }
- *pinterp_name = interp_name;
- }
- }
- if (info->end_data == 0) {
- info->start_data = info->end_code;
- info->end_data = info->end_code;
- info->brk = info->end_code;
- }
- if (qemu_log_enabled()) {
- load_symbols(ehdr, image_fd, load_bias);
- }
- close(image_fd);
- return;
- exit_read:
- if (retval >= 0) {
- errmsg = "Incomplete read of file header";
- goto exit_errmsg;
- }
- exit_perror:
- errmsg = strerror(errno);
- exit_errmsg:
- fprintf(stderr, "%s: %s\n", image_name, errmsg);
- exit(-1);
- }
- static void load_elf_interp(const char *filename, struct image_info *info,
- char bprm_buf[BPRM_BUF_SIZE])
- {
- int fd, retval;
- fd = open(path(filename), O_RDONLY);
- if (fd < 0) {
- goto exit_perror;
- }
- retval = read(fd, bprm_buf, BPRM_BUF_SIZE);
- if (retval < 0) {
- goto exit_perror;
- }
- if (retval < BPRM_BUF_SIZE) {
- memset(bprm_buf + retval, 0, BPRM_BUF_SIZE - retval);
- }
- load_elf_image(filename, fd, info, NULL, bprm_buf);
- return;
- exit_perror:
- fprintf(stderr, "%s: %s\n", filename, strerror(errno));
- exit(-1);
- }
- static int symfind(const void *s0, const void *s1)
- {
- target_ulong addr = *(target_ulong *)s0;
- struct elf_sym *sym = (struct elf_sym *)s1;
- int result = 0;
- if (addr < sym->st_value) {
- result = -1;
- } else if (addr >= sym->st_value + sym->st_size) {
- result = 1;
- }
- return result;
- }
- static const char *lookup_symbolxx(struct syminfo *s, target_ulong orig_addr)
- {
- #if ELF_CLASS == ELFCLASS32
- struct elf_sym *syms = s->disas_symtab.elf32;
- #else
- struct elf_sym *syms = s->disas_symtab.elf64;
- #endif
- // binary search
- struct elf_sym *sym;
- sym = bsearch(&orig_addr, syms, s->disas_num_syms, sizeof(*syms), symfind);
- if (sym != NULL) {
- return s->disas_strtab + sym->st_name;
- }
- return "";
- }
- /* FIXME: This should use elf_ops.h */
- static int symcmp(const void *s0, const void *s1)
- {
- struct elf_sym *sym0 = (struct elf_sym *)s0;
- struct elf_sym *sym1 = (struct elf_sym *)s1;
- return (sym0->st_value < sym1->st_value)
- ? -1
- : ((sym0->st_value > sym1->st_value) ? 1 : 0);
- }
- /* Best attempt to load symbols from this ELF object. */
- static void load_symbols(struct elfhdr *hdr, int fd, abi_ulong load_bias)
- {
- int i, shnum, nsyms, sym_idx = 0, str_idx = 0;
- struct elf_shdr *shdr;
- char *strings = NULL;
- struct syminfo *s = NULL;
- struct elf_sym *new_syms, *syms = NULL;
- shnum = hdr->e_shnum;
- i = shnum * sizeof(struct elf_shdr);
- shdr = (struct elf_shdr *)alloca(i);
- if (pread(fd, shdr, i, hdr->e_shoff) != i) {
- return;
- }
- bswap_shdr(shdr, shnum);
- for (i = 0; i < shnum; ++i) {
- if (shdr[i].sh_type == SHT_SYMTAB) {
- sym_idx = i;
- str_idx = shdr[i].sh_link;
- goto found;
- }
- }
- /* There will be no symbol table if the file was stripped. */
- return;
- found:
- /* Now know where the strtab and symtab are. Snarf them. */
- s = malloc(sizeof(*s));
- if (!s) {
- goto give_up;
- }
- i = shdr[str_idx].sh_size;
- s->disas_strtab = strings = malloc(i);
- if (!strings || pread(fd, strings, i, shdr[str_idx].sh_offset) != i) {
- goto give_up;
- }
- i = shdr[sym_idx].sh_size;
- syms = malloc(i);
- if (!syms || pread(fd, syms, i, shdr[sym_idx].sh_offset) != i) {
- goto give_up;
- }
- nsyms = i / sizeof(struct elf_sym);
- for (i = 0; i < nsyms; ) {
- bswap_sym(syms + i);
- /* Throw away entries which we do not need. */
- if (syms[i].st_shndx == SHN_UNDEF
- || syms[i].st_shndx >= SHN_LORESERVE
- || ELF_ST_TYPE(syms[i].st_info) != STT_FUNC) {
- if (i < --nsyms) {
- syms[i] = syms[nsyms];
- }
- } else {
- #if defined(TARGET_ARM) || defined (TARGET_MIPS)
- /* The bottom address bit marks a Thumb or MIPS16 symbol. */
- syms[i].st_value &= ~(target_ulong)1;
- #endif
- syms[i].st_value += load_bias;
- i++;
- }
- }
- /* No "useful" symbol. */
- if (nsyms == 0) {
- goto give_up;
- }
- /* Attempt to free the storage associated with the local symbols
- that we threw away. Whether or not this has any effect on the
- memory allocation depends on the malloc implementation and how
- many symbols we managed to discard. */
- new_syms = realloc(syms, nsyms * sizeof(*syms));
- if (new_syms == NULL) {
- goto give_up;
- }
- syms = new_syms;
- qsort(syms, nsyms, sizeof(*syms), symcmp);
- s->disas_num_syms = nsyms;
- #if ELF_CLASS == ELFCLASS32
- s->disas_symtab.elf32 = syms;
- #else
- s->disas_symtab.elf64 = syms;
- #endif
- s->lookup_symbol = lookup_symbolxx;
- s->next = syminfos;
- syminfos = s;
- return;
- give_up:
- free(s);
- free(strings);
- free(syms);
- }
- int load_elf_binary(struct linux_binprm *bprm, struct image_info *info)
- {
- struct image_info interp_info;
- struct elfhdr elf_ex;
- char *elf_interpreter = NULL;
- info->start_mmap = (abi_ulong)ELF_START_MMAP;
- info->mmap = 0;
- info->rss = 0;
- load_elf_image(bprm->filename, bprm->fd, info,
- &elf_interpreter, bprm->buf);
- /* ??? We need a copy of the elf header for passing to create_elf_tables.
- If we do nothing, we'll have overwritten this when we re-use bprm->buf
- when we load the interpreter. */
- elf_ex = *(struct elfhdr *)bprm->buf;
- bprm->p = copy_elf_strings(1, &bprm->filename, bprm->page, bprm->p);
- bprm->p = copy_elf_strings(bprm->envc,bprm->envp,bprm->page,bprm->p);
- bprm->p = copy_elf_strings(bprm->argc,bprm->argv,bprm->page,bprm->p);
- if (!bprm->p) {
- fprintf(stderr, "%s: %s\n", bprm->filename, strerror(E2BIG));
- exit(-1);
- }
- /* Do this so that we can load the interpreter, if need be. We will
- change some of these later */
- bprm->p = setup_arg_pages(bprm->p, bprm, info);
- if (elf_interpreter) {
- load_elf_interp(elf_interpreter, &interp_info, bprm->buf);
- /* If the program interpreter is one of these two, then assume
- an iBCS2 image. Otherwise assume a native linux image. */
- if (strcmp(elf_interpreter, "/usr/lib/libc.so.1") == 0
- || strcmp(elf_interpreter, "/usr/lib/ld.so.1") == 0) {
- info->personality = PER_SVR4;
- /* Why this, you ask??? Well SVr4 maps page 0 as read-only,
- and some applications "depend" upon this behavior. Since
- we do not have the power to recompile these, we emulate
- the SVr4 behavior. Sigh. */
- target_mmap(0, qemu_host_page_size, PROT_READ | PROT_EXEC,
- MAP_FIXED | MAP_PRIVATE, -1, 0);
- }
- }
- bprm->p = create_elf_tables(bprm->p, bprm->argc, bprm->envc, &elf_ex,
- info, (elf_interpreter ? &interp_info : NULL));
- info->start_stack = bprm->p;
- /* If we have an interpreter, set that as the program's entry point.
- Copy the load_bias as well, to help PPC64 interpret the entry
- point as a function descriptor. Do this after creating elf tables
- so that we copy the original program entry point into the AUXV. */
- if (elf_interpreter) {
- info->load_bias = interp_info.load_bias;
- info->entry = interp_info.entry;
- free(elf_interpreter);
- }
- #ifdef USE_ELF_CORE_DUMP
- bprm->core_dump = &elf_core_dump;
- #endif
- return 0;
- }
- #ifdef USE_ELF_CORE_DUMP
- /*
- * Definitions to generate Intel SVR4-like core files.
- * These mostly have the same names as the SVR4 types with "target_elf_"
- * tacked on the front to prevent clashes with linux definitions,
- * and the typedef forms have been avoided. This is mostly like
- * the SVR4 structure, but more Linuxy, with things that Linux does
- * not support and which gdb doesn't really use excluded.
- *
- * Fields we don't dump (their contents is zero) in linux-user qemu
- * are marked with XXX.
- *
- * Core dump code is copied from linux kernel (fs/binfmt_elf.c).
- *
- * Porting ELF coredump for target is (quite) simple process. First you
- * define USE_ELF_CORE_DUMP in target ELF code (where init_thread() for
- * the target resides):
- *
- * #define USE_ELF_CORE_DUMP
- *
- * Next you define type of register set used for dumping. ELF specification
- * says that it needs to be array of elf_greg_t that has size of ELF_NREG.
- *
- * typedef <target_regtype> target_elf_greg_t;
- * #define ELF_NREG <number of registers>
- * typedef taret_elf_greg_t target_elf_gregset_t[ELF_NREG];
- *
- * Last step is to implement target specific function that copies registers
- * from given cpu into just specified register set. Prototype is:
- *
- * static void elf_core_copy_regs(taret_elf_gregset_t *regs,
- * const CPUArchState *env);
- *
- * Parameters:
- * regs - copy register values into here (allocated and zeroed by caller)
- * env - copy registers from here
- *
- * Example for ARM target is provided in this file.
- */
- /* An ELF note in memory */
- struct memelfnote {
- const char *name;
- size_t namesz;
- size_t namesz_rounded;
- int type;
- size_t datasz;
- size_t datasz_rounded;
- void *data;
- size_t notesz;
- };
- struct target_elf_siginfo {
- abi_int si_signo; /* signal number */
- abi_int si_code; /* extra code */
- abi_int si_errno; /* errno */
- };
- struct target_elf_prstatus {
- struct target_elf_siginfo pr_info; /* Info associated with signal */
- abi_short pr_cursig; /* Current signal */
- abi_ulong pr_sigpend; /* XXX */
- abi_ulong pr_sighold; /* XXX */
- target_pid_t pr_pid;
- target_pid_t pr_ppid;
- target_pid_t pr_pgrp;
- target_pid_t pr_sid;
- struct target_timeval pr_utime; /* XXX User time */
- struct target_timeval pr_stime; /* XXX System time */
- struct target_timeval pr_cutime; /* XXX Cumulative user time */
- struct target_timeval pr_cstime; /* XXX Cumulative system time */
- target_elf_gregset_t pr_reg; /* GP registers */
- abi_int pr_fpvalid; /* XXX */
- };
- #define ELF_PRARGSZ (80) /* Number of chars for args */
- struct target_elf_prpsinfo {
- char pr_state; /* numeric process state */
- char pr_sname; /* char for pr_state */
- char pr_zomb; /* zombie */
- char pr_nice; /* nice val */
- abi_ulong pr_flag; /* flags */
- target_uid_t pr_uid;
- target_gid_t pr_gid;
- target_pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid;
- /* Lots missing */
- char pr_fname[16]; /* filename of executable */
- char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */
- };
- /* Here is the structure in which status of each thread is captured. */
- struct elf_thread_status {
- QTAILQ_ENTRY(elf_thread_status) ets_link;
- struct target_elf_prstatus prstatus; /* NT_PRSTATUS */
- #if 0
- elf_fpregset_t fpu; /* NT_PRFPREG */
- struct task_struct *thread;
- elf_fpxregset_t xfpu; /* ELF_CORE_XFPREG_TYPE */
- #endif
- struct memelfnote notes[1];
- int num_notes;
- };
- struct elf_note_info {
- struct memelfnote *notes;
- struct target_elf_prstatus *prstatus; /* NT_PRSTATUS */
- struct target_elf_prpsinfo *psinfo; /* NT_PRPSINFO */
- QTAILQ_HEAD(thread_list_head, elf_thread_status) thread_list;
- #if 0
- /*
- * Current version of ELF coredump doesn't support
- * dumping fp regs etc.
- */
- elf_fpregset_t *fpu;
- elf_fpxregset_t *xfpu;
- int thread_status_size;
- #endif
- int notes_size;
- int numnote;
- };
- struct vm_area_struct {
- abi_ulong vma_start; /* start vaddr of memory region */
- abi_ulong vma_end; /* end vaddr of memory region */
- abi_ulong vma_flags; /* protection etc. flags for the region */
- QTAILQ_ENTRY(vm_area_struct) vma_link;
- };
- struct mm_struct {
- QTAILQ_HEAD(, vm_area_struct) mm_mmap;
- int mm_count; /* number of mappings */
- };
- static struct mm_struct *vma_init(void);
- static void vma_delete(struct mm_struct *);
- static int vma_add_mapping(struct mm_struct *, abi_ulong,
- abi_ulong, abi_ulong);
- static int vma_get_mapping_count(const struct mm_struct *);
- static struct vm_area_struct *vma_first(const struct mm_struct *);
- static struct vm_area_struct *vma_next(struct vm_area_struct *);
- static abi_ulong vma_dump_size(const struct vm_area_struct *);
- static int vma_walker(void *priv, abi_ulong start, abi_ulong end,
- unsigned long flags);
- static void fill_elf_header(struct elfhdr *, int, uint16_t, uint32_t);
- static void fill_note(struct memelfnote *, const char *, int,
- unsigned int, void *);
- static void fill_prstatus(struct target_elf_prstatus *, const TaskState *, int);
- static int fill_psinfo(struct target_elf_prpsinfo *, const TaskState *);
- static void fill_auxv_note(struct memelfnote *, const TaskState *);
- static void fill_elf_note_phdr(struct elf_phdr *, int, off_t);
- static size_t note_size(const struct memelfnote *);
- static void free_note_info(struct elf_note_info *);
- static int fill_note_info(struct elf_note_info *, long, const CPUArchState *);
- static void fill_thread_info(struct elf_note_info *, const CPUArchState *);
- static int core_dump_filename(const TaskState *, char *, size_t);
- static int dump_write(int, const void *, size_t);
- static int write_note(struct memelfnote *, int);
- static int write_note_info(struct elf_note_info *, int);
- #ifdef BSWAP_NEEDED
- static void bswap_prstatus(struct target_elf_prstatus *prstatus)
- {
- prstatus->pr_info.si_signo = tswap32(prstatus->pr_info.si_signo);
- prstatus->pr_info.si_code = tswap32(prstatus->pr_info.si_code);
- prstatus->pr_info.si_errno = tswap32(prstatus->pr_info.si_errno);
- prstatus->pr_cursig = tswap16(prstatus->pr_cursig);
- prstatus->pr_sigpend = tswapal(prstatus->pr_sigpend);
- prstatus->pr_sighold = tswapal(prstatus->pr_sighold);
- prstatus->pr_pid = tswap32(prstatus->pr_pid);
- prstatus->pr_ppid = tswap32(prstatus->pr_ppid);
- prstatus->pr_pgrp = tswap32(prstatus->pr_pgrp);
- prstatus->pr_sid = tswap32(prstatus->pr_sid);
- /* cpu times are not filled, so we skip them */
- /* regs should be in correct format already */
- prstatus->pr_fpvalid = tswap32(prstatus->pr_fpvalid);
- }
- static void bswap_psinfo(struct target_elf_prpsinfo *psinfo)
- {
- psinfo->pr_flag = tswapal(psinfo->pr_flag);
- psinfo->pr_uid = tswap16(psinfo->pr_uid);
- psinfo->pr_gid = tswap16(psinfo->pr_gid);
- psinfo->pr_pid = tswap32(psinfo->pr_pid);
- psinfo->pr_ppid = tswap32(psinfo->pr_ppid);
- psinfo->pr_pgrp = tswap32(psinfo->pr_pgrp);
- psinfo->pr_sid = tswap32(psinfo->pr_sid);
- }
- static void bswap_note(struct elf_note *en)
- {
- bswap32s(&en->n_namesz);
- bswap32s(&en->n_descsz);
- bswap32s(&en->n_type);
- }
- #else
- static inline void bswap_prstatus(struct target_elf_prstatus *p) { }
- static inline void bswap_psinfo(struct target_elf_prpsinfo *p) {}
- static inline void bswap_note(struct elf_note *en) { }
- #endif /* BSWAP_NEEDED */
- /*
- * Minimal support for linux memory regions. These are needed
- * when we are finding out what memory exactly belongs to
- * emulated process. No locks needed here, as long as
- * thread that received the signal is stopped.
- */
- static struct mm_struct *vma_init(void)
- {
- struct mm_struct *mm;
- if ((mm = g_malloc(sizeof (*mm))) == NULL)
- return (NULL);
- mm->mm_count = 0;
- QTAILQ_INIT(&mm->mm_mmap);
- return (mm);
- }
- static void vma_delete(struct mm_struct *mm)
- {
- struct vm_area_struct *vma;
- while ((vma = vma_first(mm)) != NULL) {
- QTAILQ_REMOVE(&mm->mm_mmap, vma, vma_link);
- g_free(vma);
- }
- g_free(mm);
- }
- static int vma_add_mapping(struct mm_struct *mm, abi_ulong start,
- abi_ulong end, abi_ulong flags)
- {
- struct vm_area_struct *vma;
- if ((vma = g_malloc0(sizeof (*vma))) == NULL)
- return (-1);
- vma->vma_start = start;
- vma->vma_end = end;
- vma->vma_flags = flags;
- QTAILQ_INSERT_TAIL(&mm->mm_mmap, vma, vma_link);
- mm->mm_count++;
- return (0);
- }
- static struct vm_area_struct *vma_first(const struct mm_struct *mm)
- {
- return (QTAILQ_FIRST(&mm->mm_mmap));
- }
- static struct vm_area_struct *vma_next(struct vm_area_struct *vma)
- {
- return (QTAILQ_NEXT(vma, vma_link));
- }
- static int vma_get_mapping_count(const struct mm_struct *mm)
- {
- return (mm->mm_count);
- }
- /*
- * Calculate file (dump) size of given memory region.
- */
- static abi_ulong vma_dump_size(const struct vm_area_struct *vma)
- {
- /* if we cannot even read the first page, skip it */
- if (!access_ok(VERIFY_READ, vma->vma_start, TARGET_PAGE_SIZE))
- return (0);
- /*
- * Usually we don't dump executable pages as they contain
- * non-writable code that debugger can read directly from
- * target library etc. However, thread stacks are marked
- * also executable so we read in first page of given region
- * and check whether it contains elf header. If there is
- * no elf header, we dump it.
- */
- if (vma->vma_flags & PROT_EXEC) {
- char page[TARGET_PAGE_SIZE];
- copy_from_user(page, vma->vma_start, sizeof (page));
- if ((page[EI_MAG0] == ELFMAG0) &&
- (page[EI_MAG1] == ELFMAG1) &&
- (page[EI_MAG2] == ELFMAG2) &&
- (page[EI_MAG3] == ELFMAG3)) {
- /*
- * Mappings are possibly from ELF binary. Don't dump
- * them.
- */
- return (0);
- }
- }
- return (vma->vma_end - vma->vma_start);
- }
- static int vma_walker(void *priv, abi_ulong start, abi_ulong end,
- unsigned long flags)
- {
- struct mm_struct *mm = (struct mm_struct *)priv;
- vma_add_mapping(mm, start, end, flags);
- return (0);
- }
- static void fill_note(struct memelfnote *note, const char *name, int type,
- unsigned int sz, void *data)
- {
- unsigned int namesz;
- namesz = strlen(name) + 1;
- note->name = name;
- note->namesz = namesz;
- note->namesz_rounded = roundup(namesz, sizeof (int32_t));
- note->type = type;
- note->datasz = sz;
- note->datasz_rounded = roundup(sz, sizeof (int32_t));
- note->data = data;
- /*
- * We calculate rounded up note size here as specified by
- * ELF document.
- */
- note->notesz = sizeof (struct elf_note) +
- note->namesz_rounded + note->datasz_rounded;
- }
- static void fill_elf_header(struct elfhdr *elf, int segs, uint16_t machine,
- uint32_t flags)
- {
- (void) memset(elf, 0, sizeof(*elf));
- (void) memcpy(elf->e_ident, ELFMAG, SELFMAG);
- elf->e_ident[EI_CLASS] = ELF_CLASS;
- elf->e_ident[EI_DATA] = ELF_DATA;
- elf->e_ident[EI_VERSION] = EV_CURRENT;
- elf->e_ident[EI_OSABI] = ELF_OSABI;
- elf->e_type = ET_CORE;
- elf->e_machine = machine;
- elf->e_version = EV_CURRENT;
- elf->e_phoff = sizeof(struct elfhdr);
- elf->e_flags = flags;
- elf->e_ehsize = sizeof(struct elfhdr);
- elf->e_phentsize = sizeof(struct elf_phdr);
- elf->e_phnum = segs;
- bswap_ehdr(elf);
- }
- static void fill_elf_note_phdr(struct elf_phdr *phdr, int sz, off_t offset)
- {
- phdr->p_type = PT_NOTE;
- phdr->p_offset = offset;
- phdr->p_vaddr = 0;
- phdr->p_paddr = 0;
- phdr->p_filesz = sz;
- phdr->p_memsz = 0;
- phdr->p_flags = 0;
- phdr->p_align = 0;
- bswap_phdr(phdr, 1);
- }
- static size_t note_size(const struct memelfnote *note)
- {
- return (note->notesz);
- }
- static void fill_prstatus(struct target_elf_prstatus *prstatus,
- const TaskState *ts, int signr)
- {
- (void) memset(prstatus, 0, sizeof (*prstatus));
- prstatus->pr_info.si_signo = prstatus->pr_cursig = signr;
- prstatus->pr_pid = ts->ts_tid;
- prstatus->pr_ppid = getppid();
- prstatus->pr_pgrp = getpgrp();
- prstatus->pr_sid = getsid(0);
- bswap_prstatus(prstatus);
- }
- static int fill_psinfo(struct target_elf_prpsinfo *psinfo, const TaskState *ts)
- {
- char *base_filename;
- unsigned int i, len;
- (void) memset(psinfo, 0, sizeof (*psinfo));
- len = ts->info->arg_end - ts->info->arg_start;
- if (len >= ELF_PRARGSZ)
- len = ELF_PRARGSZ - 1;
- if (copy_from_user(&psinfo->pr_psargs, ts->info->arg_start, len))
- return -EFAULT;
- for (i = 0; i < len; i++)
- if (psinfo->pr_psargs[i] == 0)
- psinfo->pr_psargs[i] = ' ';
- psinfo->pr_psargs[len] = 0;
- psinfo->pr_pid = getpid();
- psinfo->pr_ppid = getppid();
- psinfo->pr_pgrp = getpgrp();
- psinfo->pr_sid = getsid(0);
- psinfo->pr_uid = getuid();
- psinfo->pr_gid = getgid();
- base_filename = g_path_get_basename(ts->bprm->filename);
- /*
- * Using strncpy here is fine: at max-length,
- * this field is not NUL-terminated.
- */
- (void) strncpy(psinfo->pr_fname, base_filename,
- sizeof(psinfo->pr_fname));
- g_free(base_filename);
- bswap_psinfo(psinfo);
- return (0);
- }
- static void fill_auxv_note(struct memelfnote *note, const TaskState *ts)
- {
- elf_addr_t auxv = (elf_addr_t)ts->info->saved_auxv;
- elf_addr_t orig_auxv = auxv;
- void *ptr;
- int len = ts->info->auxv_len;
- /*
- * Auxiliary vector is stored in target process stack. It contains
- * {type, value} pairs that we need to dump into note. This is not
- * strictly necessary but we do it here for sake of completeness.
- */
- /* read in whole auxv vector and copy it to memelfnote */
- ptr = lock_user(VERIFY_READ, orig_auxv, len, 0);
- if (ptr != NULL) {
- fill_note(note, "CORE", NT_AUXV, len, ptr);
- unlock_user(ptr, auxv, len);
- }
- }
- /*
- * Constructs name of coredump file. We have following convention
- * for the name:
- * qemu_<basename-of-target-binary>_<date>-<time>_<pid>.core
- *
- * Returns 0 in case of success, -1 otherwise (errno is set).
- */
- static int core_dump_filename(const TaskState *ts, char *buf,
- size_t bufsize)
- {
- char timestamp[64];
- char *filename = NULL;
- char *base_filename = NULL;
- struct timeval tv;
- struct tm tm;
- assert(bufsize >= PATH_MAX);
- if (gettimeofday(&tv, NULL) < 0) {
- (void) fprintf(stderr, "unable to get current timestamp: %s",
- strerror(errno));
- return (-1);
- }
- filename = strdup(ts->bprm->filename);
- base_filename = strdup(basename(filename));
- (void) strftime(timestamp, sizeof (timestamp), "%Y%m%d-%H%M%S",
- localtime_r(&tv.tv_sec, &tm));
- (void) snprintf(buf, bufsize, "qemu_%s_%s_%d.core",
- base_filename, timestamp, (int)getpid());
- free(base_filename);
- free(filename);
- return (0);
- }
- static int dump_write(int fd, const void *ptr, size_t size)
- {
- const char *bufp = (const char *)ptr;
- ssize_t bytes_written, bytes_left;
- struct rlimit dumpsize;
- off_t pos;
- bytes_written = 0;
- getrlimit(RLIMIT_CORE, &dumpsize);
- if ((pos = lseek(fd, 0, SEEK_CUR))==-1) {
- if (errno == ESPIPE) { /* not a seekable stream */
- bytes_left = size;
- } else {
- return pos;
- }
- } else {
- if (dumpsize.rlim_cur <= pos) {
- return -1;
- } else if (dumpsize.rlim_cur == RLIM_INFINITY) {
- bytes_left = size;
- } else {
- size_t limit_left=dumpsize.rlim_cur - pos;
- bytes_left = limit_left >= size ? size : limit_left ;
- }
- }
- /*
- * In normal conditions, single write(2) should do but
- * in case of socket etc. this mechanism is more portable.
- */
- do {
- bytes_written = write(fd, bufp, bytes_left);
- if (bytes_written < 0) {
- if (errno == EINTR)
- continue;
- return (-1);
- } else if (bytes_written == 0) { /* eof */
- return (-1);
- }
- bufp += bytes_written;
- bytes_left -= bytes_written;
- } while (bytes_left > 0);
- return (0);
- }
- static int write_note(struct memelfnote *men, int fd)
- {
- struct elf_note en;
- en.n_namesz = men->namesz;
- en.n_type = men->type;
- en.n_descsz = men->datasz;
- bswap_note(&en);
- if (dump_write(fd, &en, sizeof(en)) != 0)
- return (-1);
- if (dump_write(fd, men->name, men->namesz_rounded) != 0)
- return (-1);
- if (dump_write(fd, men->data, men->datasz_rounded) != 0)
- return (-1);
- return (0);
- }
- static void fill_thread_info(struct elf_note_info *info, const CPUArchState *env)
- {
- CPUState *cpu = ENV_GET_CPU((CPUArchState *)env);
- TaskState *ts = (TaskState *)cpu->opaque;
- struct elf_thread_status *ets;
- ets = g_malloc0(sizeof (*ets));
- ets->num_notes = 1; /* only prstatus is dumped */
- fill_prstatus(&ets->prstatus, ts, 0);
- elf_core_copy_regs(&ets->prstatus.pr_reg, env);
- fill_note(&ets->notes[0], "CORE", NT_PRSTATUS, sizeof (ets->prstatus),
- &ets->prstatus);
- QTAILQ_INSERT_TAIL(&info->thread_list, ets, ets_link);
- info->notes_size += note_size(&ets->notes[0]);
- }
- static void init_note_info(struct elf_note_info *info)
- {
- /* Initialize the elf_note_info structure so that it is at
- * least safe to call free_note_info() on it. Must be
- * called before calling fill_note_info().
- */
- memset(info, 0, sizeof (*info));
- QTAILQ_INIT(&info->thread_list);
- }
- static int fill_note_info(struct elf_note_info *info,
- long signr, const CPUArchState *env)
- {
- #define NUMNOTES 3
- CPUState *cpu = ENV_GET_CPU((CPUArchState *)env);
- TaskState *ts = (TaskState *)cpu->opaque;
- int i;
- info->notes = g_malloc0(NUMNOTES * sizeof (struct memelfnote));
- if (info->notes == NULL)
- return (-ENOMEM);
- info->prstatus = g_malloc0(sizeof (*info->prstatus));
- if (info->prstatus == NULL)
- return (-ENOMEM);
- info->psinfo = g_malloc0(sizeof (*info->psinfo));
- if (info->prstatus == NULL)
- return (-ENOMEM);
- /*
- * First fill in status (and registers) of current thread
- * including process info & aux vector.
- */
- fill_prstatus(info->prstatus, ts, signr);
- elf_core_copy_regs(&info->prstatus->pr_reg, env);
- fill_note(&info->notes[0], "CORE", NT_PRSTATUS,
- sizeof (*info->prstatus), info->prstatus);
- fill_psinfo(info->psinfo, ts);
- fill_note(&info->notes[1], "CORE", NT_PRPSINFO,
- sizeof (*info->psinfo), info->psinfo);
- fill_auxv_note(&info->notes[2], ts);
- info->numnote = 3;
- info->notes_size = 0;
- for (i = 0; i < info->numnote; i++)
- info->notes_size += note_size(&info->notes[i]);
- /* read and fill status of all threads */
- cpu_list_lock();
- CPU_FOREACH(cpu) {
- if (cpu == thread_cpu) {
- continue;
- }
- fill_thread_info(info, (CPUArchState *)cpu->env_ptr);
- }
- cpu_list_unlock();
- return (0);
- }
- static void free_note_info(struct elf_note_info *info)
- {
- struct elf_thread_status *ets;
- while (!QTAILQ_EMPTY(&info->thread_list)) {
- ets = QTAILQ_FIRST(&info->thread_list);
- QTAILQ_REMOVE(&info->thread_list, ets, ets_link);
- g_free(ets);
- }
- g_free(info->prstatus);
- g_free(info->psinfo);
- g_free(info->notes);
- }
- static int write_note_info(struct elf_note_info *info, int fd)
- {
- struct elf_thread_status *ets;
- int i, error = 0;
- /* write prstatus, psinfo and auxv for current thread */
- for (i = 0; i < info->numnote; i++)
- if ((error = write_note(&info->notes[i], fd)) != 0)
- return (error);
- /* write prstatus for each thread */
- for (ets = info->thread_list.tqh_first; ets != NULL;
- ets = ets->ets_link.tqe_next) {
- if ((error = write_note(&ets->notes[0], fd)) != 0)
- return (error);
- }
- return (0);
- }
- /*
- * Write out ELF coredump.
- *
- * See documentation of ELF object file format in:
- * http://www.caldera.com/developers/devspecs/gabi41.pdf
- *
- * Coredump format in linux is following:
- *
- * 0 +----------------------+ \
- * | ELF header | ET_CORE |
- * +----------------------+ |
- * | ELF program headers | |--- headers
- * | - NOTE section | |
- * | - PT_LOAD sections | |
- * +----------------------+ /
- * | NOTEs: |
- * | - NT_PRSTATUS |
- * | - NT_PRSINFO |
- * | - NT_AUXV |
- * +----------------------+ <-- aligned to target page
- * | Process memory dump |
- * : :
- * . .
- * : :
- * | |
- * +----------------------+
- *
- * NT_PRSTATUS -> struct elf_prstatus (per thread)
- * NT_PRSINFO -> struct elf_prpsinfo
- * NT_AUXV is array of { type, value } pairs (see fill_auxv_note()).
- *
- * Format follows System V format as close as possible. Current
- * version limitations are as follows:
- * - no floating point registers are dumped
- *
- * Function returns 0 in case of success, negative errno otherwise.
- *
- * TODO: make this work also during runtime: it should be
- * possible to force coredump from running process and then
- * continue processing. For example qemu could set up SIGUSR2
- * handler (provided that target process haven't registered
- * handler for that) that does the dump when signal is received.
- */
- static int elf_core_dump(int signr, const CPUArchState *env)
- {
- const CPUState *cpu = ENV_GET_CPU((CPUArchState *)env);
- const TaskState *ts = (const TaskState *)cpu->opaque;
- struct vm_area_struct *vma = NULL;
- char corefile[PATH_MAX];
- struct elf_note_info info;
- struct elfhdr elf;
- struct elf_phdr phdr;
- struct rlimit dumpsize;
- struct mm_struct *mm = NULL;
- off_t offset = 0, data_offset = 0;
- int segs = 0;
- int fd = -1;
- init_note_info(&info);
- errno = 0;
- getrlimit(RLIMIT_CORE, &dumpsize);
- if (dumpsize.rlim_cur == 0)
- return 0;
- if (core_dump_filename(ts, corefile, sizeof (corefile)) < 0)
- return (-errno);
- if ((fd = open(corefile, O_WRONLY | O_CREAT,
- S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)) < 0)
- return (-errno);
- /*
- * Walk through target process memory mappings and
- * set up structure containing this information. After
- * this point vma_xxx functions can be used.
- */
- if ((mm = vma_init()) == NULL)
- goto out;
- walk_memory_regions(mm, vma_walker);
- segs = vma_get_mapping_count(mm);
- /*
- * Construct valid coredump ELF header. We also
- * add one more segment for notes.
- */
- fill_elf_header(&elf, segs + 1, ELF_MACHINE, 0);
- if (dump_write(fd, &elf, sizeof (elf)) != 0)
- goto out;
- /* fill in in-memory version of notes */
- if (fill_note_info(&info, signr, env) < 0)
- goto out;
- offset += sizeof (elf); /* elf header */
- offset += (segs + 1) * sizeof (struct elf_phdr); /* program headers */
- /* write out notes program header */
- fill_elf_note_phdr(&phdr, info.notes_size, offset);
- offset += info.notes_size;
- if (dump_write(fd, &phdr, sizeof (phdr)) != 0)
- goto out;
- /*
- * ELF specification wants data to start at page boundary so
- * we align it here.
- */
- data_offset = offset = roundup(offset, ELF_EXEC_PAGESIZE);
- /*
- * Write program headers for memory regions mapped in
- * the target process.
- */
- for (vma = vma_first(mm); vma != NULL; vma = vma_next(vma)) {
- (void) memset(&phdr, 0, sizeof (phdr));
- phdr.p_type = PT_LOAD;
- phdr.p_offset = offset;
- phdr.p_vaddr = vma->vma_start;
- phdr.p_paddr = 0;
- phdr.p_filesz = vma_dump_size(vma);
- offset += phdr.p_filesz;
- phdr.p_memsz = vma->vma_end - vma->vma_start;
- phdr.p_flags = vma->vma_flags & PROT_READ ? PF_R : 0;
- if (vma->vma_flags & PROT_WRITE)
- phdr.p_flags |= PF_W;
- if (vma->vma_flags & PROT_EXEC)
- phdr.p_flags |= PF_X;
- phdr.p_align = ELF_EXEC_PAGESIZE;
- bswap_phdr(&phdr, 1);
- dump_write(fd, &phdr, sizeof (phdr));
- }
- /*
- * Next we write notes just after program headers. No
- * alignment needed here.
- */
- if (write_note_info(&info, fd) < 0)
- goto out;
- /* align data to page boundary */
- if (lseek(fd, data_offset, SEEK_SET) != data_offset)
- goto out;
- /*
- * Finally we can dump process memory into corefile as well.
- */
- for (vma = vma_first(mm); vma != NULL; vma = vma_next(vma)) {
- abi_ulong addr;
- abi_ulong end;
- end = vma->vma_start + vma_dump_size(vma);
- for (addr = vma->vma_start; addr < end;
- addr += TARGET_PAGE_SIZE) {
- char page[TARGET_PAGE_SIZE];
- int error;
- /*
- * Read in page from target process memory and
- * write it to coredump file.
- */
- error = copy_from_user(page, addr, sizeof (page));
- if (error != 0) {
- (void) fprintf(stderr, "unable to dump " TARGET_ABI_FMT_lx "\n",
- addr);
- errno = -error;
- goto out;
- }
- if (dump_write(fd, page, TARGET_PAGE_SIZE) < 0)
- goto out;
- }
- }
- out:
- free_note_info(&info);
- if (mm != NULL)
- vma_delete(mm);
- (void) close(fd);
- if (errno != 0)
- return (-errno);
- return (0);
- }
- #endif /* USE_ELF_CORE_DUMP */
- void do_init_thread(struct target_pt_regs *regs, struct image_info *infop)
- {
- init_thread(regs, infop);
- }
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