1 /* 2 * loader.h: prototypes for linux-user guest binary loader 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; either version 2 of the License, or 7 * (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, see <http://www.gnu.org/licenses/>. 16 */ 17 18 #ifndef LINUX_USER_LOADER_H 19 #define LINUX_USER_LOADER_H 20 21 typedef struct { 22 const void *cache; 23 unsigned int cache_size; 24 int fd; 25 } ImageSource; 26 27 /** 28 * imgsrc_read: Read from ImageSource 29 * @dst: destination for read 30 * @offset: offset within file for read 31 * @len: size of the read 32 * @img: ImageSource to read from 33 * @errp: Error details. 34 * 35 * Read into @dst, using the cache when possible. 36 */ 37 bool imgsrc_read(void *dst, off_t offset, size_t len, 38 const ImageSource *img, Error **errp); 39 40 /** 41 * imgsrc_read_alloc: Read from ImageSource 42 * @offset: offset within file for read 43 * @size: size of the read 44 * @img: ImageSource to read from 45 * @errp: Error details. 46 * 47 * Read into newly allocated memory, using the cache when possible. 48 */ 49 void *imgsrc_read_alloc(off_t offset, size_t len, 50 const ImageSource *img, Error **errp); 51 52 /** 53 * imgsrc_mmap: Map from ImageSource 54 * 55 * If @src has a file descriptor, pass on to target_mmap. Otherwise, 56 * this is "mapping" from a host buffer, which resolves to memcpy. 57 * Therefore, flags must be MAP_PRIVATE | MAP_FIXED; the argument is 58 * retained for clarity. 59 */ 60 abi_long imgsrc_mmap(abi_ulong start, abi_ulong len, int prot, 61 int flags, const ImageSource *src, abi_ulong offset); 62 63 /* 64 * Read a good amount of data initially, to hopefully get all the 65 * program headers loaded. 66 */ 67 #define BPRM_BUF_SIZE 1024 68 69 /* 70 * This structure is used to hold the arguments that are 71 * used when loading binaries. 72 */ 73 struct linux_binprm { 74 char buf[BPRM_BUF_SIZE] __attribute__((aligned)); 75 ImageSource src; 76 abi_ulong p; 77 int e_uid, e_gid; 78 int argc, envc; 79 char **argv; 80 char **envp; 81 char *filename; /* Name of binary */ 82 int (*core_dump)(int, const CPUArchState *); /* coredump routine */ 83 }; 84 85 abi_ulong loader_build_argptr(int envc, int argc, abi_ulong sp, 86 abi_ulong stringp, int push_ptr); 87 int loader_exec(int fdexec, const char *filename, char **argv, char **envp, 88 struct image_info *infop, struct linux_binprm *); 89 90 uint32_t get_elf_eflags(int fd); 91 int load_elf_binary(struct linux_binprm *bprm, struct image_info *info); 92 int load_flt_binary(struct linux_binprm *bprm, struct image_info *info); 93 94 abi_long memcpy_to_target(abi_ulong dest, const void *src, 95 unsigned long len); 96 97 extern unsigned long guest_stack_size; 98 99 /* Note that Elf32 and Elf64 use uint32_t for e_flags. */ 100 const char *get_elf_cpu_model(uint32_t eflags); 101 102 abi_ulong get_elf_hwcap(CPUState *cs); 103 abi_ulong get_elf_hwcap2(CPUState *cs); 104 const char *elf_hwcap_str(uint32_t bit); 105 const char *elf_hwcap2_str(uint32_t bit); 106 const char *get_elf_platform(CPUState *cs); 107 const char *get_elf_base_platform(CPUState *cs); 108 bool init_guest_commpage(void); 109 110 struct target_elf_gregset_t; 111 void elf_core_copy_regs(struct target_elf_gregset_t *, const CPUArchState *); 112 113 typedef struct { 114 const uint8_t *image; 115 const uint32_t *relocs; 116 unsigned image_size; 117 unsigned reloc_count; 118 unsigned sigreturn_ofs; 119 unsigned rt_sigreturn_ofs; 120 unsigned sigreturn_region_start_ofs; 121 unsigned sigreturn_region_end_ofs; 122 } VdsoImageInfo; 123 124 /* Note that both Elf32_Word and Elf64_Word are uint32_t. */ 125 const VdsoImageInfo *get_vdso_image_info(uint32_t elf_flags); 126 127 bool arch_parse_elf_property(uint32_t pr_type, uint32_t pr_datasz, 128 const uint32_t *data, 129 struct image_info *info, 130 Error **errp); 131 132 #endif /* LINUX_USER_LOADER_H */ 133