#include <stdio.h>
#include <sys/types.h>
#include <fcntl.h>
-#include <sys/stat.h>
#include <errno.h>
#include <unistd.h>
#include <sys/mman.h>
#define ELF_DATA ELFDATA2LSB
#define ELF_ARCH EM_386
- /* 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. */
-#define ELF_PLAT_INIT(_r) _r->edx = 0
-
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 USE_ELF_CORE_DUMP
#endif
#define ELF_ARCH EM_ARM
-#define ELF_PLAT_INIT(_r) _r->ARM_r0 = 0
-
static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
{
- target_long *stack = (void *)infop->start_stack;
+ target_long stack = infop->start_stack;
memset(regs, 0, sizeof(*regs));
regs->ARM_cpsr = 0x10;
- regs->ARM_pc = infop->entry;
+ if (infop->entry & 1)
+ regs->ARM_cpsr |= CPSR_T;
+ regs->ARM_pc = infop->entry & 0xfffffffe;
regs->ARM_sp = infop->start_stack;
- regs->ARM_r2 = tswapl(stack[2]); /* envp */
- regs->ARM_r1 = tswapl(stack[1]); /* argv */
+ regs->ARM_r2 = tgetl(stack + 8); /* envp */
+ regs->ARM_r1 = tgetl(stack + 4); /* envp */
/* XXX: it seems that r0 is zeroed after ! */
- // regs->ARM_r0 = tswapl(stack[0]); /* argc */
+ regs->ARM_r0 = 0;
+ /* For uClinux PIC binaries. */
+ regs->ARM_r10 = infop->start_data;
}
#define USE_ELF_CORE_DUMP
#define ELF_START_MMAP 0x80000000
-#define elf_check_arch(x) ( (x) == EM_SPARC )
+#define elf_check_arch(x) ( (x) == EM_SPARCV9 )
#define ELF_CLASS ELFCLASS64
#define ELF_DATA ELFDATA2MSB
-#define ELF_ARCH EM_SPARC
+#define ELF_ARCH EM_SPARCV9
-/*XXX*/
-#define ELF_PLAT_INIT(_r)
+#define STACK_BIAS 2047
static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
{
regs->pc = infop->entry;
regs->npc = regs->pc + 4;
regs->y = 0;
- regs->u_regs[14] = infop->start_stack - 16 * 4;
+ regs->u_regs[14] = infop->start_stack - 16 * 8 - STACK_BIAS;
}
#else
#define ELF_DATA ELFDATA2MSB
#define ELF_ARCH EM_SPARC
-/*XXX*/
-#define ELF_PLAT_INIT(_r)
-
static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
{
regs->psr = 0;
#endif
#define ELF_ARCH EM_PPC
-/* Note that isn't exactly what regular kernel does
- * but this is what the ABI wants and is needed to allow
- * execution of PPC BSD programs.
- */
-#define ELF_PLAT_INIT(_r) \
-do { \
- target_ulong *pos = (target_ulong *)bprm->p, tmp = 1; \
- _r->gpr[3] = bprm->argc; \
- _r->gpr[4] = (unsigned long)++pos; \
- for (; tmp != 0; pos++) \
- tmp = *pos; \
- _r->gpr[5] = (unsigned long)pos; \
-} while (0)
-
/*
* We need to put in some extra aux table entries to tell glibc what
* the cache block size is, so it can use the dcbz instruction safely.
static inline void init_thread(struct target_pt_regs *_regs, struct image_info *infop)
{
+ target_ulong pos = infop->start_stack;
+ target_ulong tmp;
+
_regs->msr = 1 << MSR_PR; /* Set user mode */
_regs->gpr[1] = infop->start_stack;
_regs->nip = infop->entry;
+ /* Note that isn't exactly what regular kernel does
+ * but this is what the ABI wants and is needed to allow
+ * execution of PPC BSD programs.
+ */
+ _regs->gpr[3] = tgetl(pos);
+ pos += sizeof(target_ulong);
+ _regs->gpr[4] = pos;
+ for (tmp = 1; tmp != 0; pos += sizeof(target_ulong))
+ tmp = ldl(pos);
+ _regs->gpr[5] = pos;
}
#define USE_ELF_CORE_DUMP
#endif
#define ELF_ARCH EM_MIPS
-#define ELF_PLAT_INIT(_r)
-
static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
{
regs->cp0_status = CP0St_UM;
#endif /* TARGET_MIPS */
+#ifdef TARGET_SH4
+
+#define ELF_START_MMAP 0x80000000
+
+#define elf_check_arch(x) ( (x) == EM_SH )
+
+#define ELF_CLASS ELFCLASS32
+#define ELF_DATA ELFDATA2LSB
+#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 - 16 * 4;
+}
+
+#define USE_ELF_CORE_DUMP
+#define ELF_EXEC_PAGESIZE 4096
+
+#endif
+
+#ifdef TARGET_M68K
+
+#define ELF_START_MMAP 0x80000000
+
+#define elf_check_arch(x) ( (x) == EM_68K )
+
+#define ELF_CLASS ELFCLASS32
+#define ELF_DATA ELFDATA2MSB
+#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;
+}
+
+#define USE_ELF_CORE_DUMP
+#define ELF_EXEC_PAGESIZE 8192
+
+#endif
+
#ifndef ELF_PLATFORM
#define ELF_PLATFORM (NULL)
#endif
#include "elf.h"
-/*
- * MAX_ARG_PAGES defines the number of pages allocated for arguments
- * and envelope for the new program. 32 should suffice, this gives
- * a maximum env+arg of 128kB w/4KB pages!
- */
-#define MAX_ARG_PAGES 32
-
-/*
- * This structure is used to hold the arguments that are
- * used when loading binaries.
- */
-struct linux_binprm {
- char buf[128];
- unsigned long page[MAX_ARG_PAGES];
- unsigned long p;
- int sh_bang;
- int fd;
- int e_uid, e_gid;
- int argc, envc;
- char * filename; /* Name of binary */
- unsigned long loader, exec;
- int dont_iput; /* binfmt handler has put inode */
-};
-
struct exec
{
unsigned int a_info; /* Use macros N_MAGIC, etc for access */
#define PER_XENIX (0x0007 | STICKY_TIMEOUTS)
/* Necessary parameters */
-#define NGROUPS 32
-
#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))
}
#endif
-static void * get_free_page(void)
-{
- void * retval;
-
- /* User-space version of kernel get_free_page. Returns a page-aligned
- * page-sized chunk of memory.
- */
- retval = (void *)target_mmap(0, qemu_host_page_size, PROT_READ|PROT_WRITE,
- MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
-
- if((long)retval == -1) {
- perror("get_free_page");
- exit(-1);
- }
- else {
- return(retval);
- }
-}
-
-static void free_page(void * pageaddr)
-{
- target_munmap((unsigned long)pageaddr, qemu_host_page_size);
-}
-
/*
- * 'copy_string()' copies argument/envelope strings from user
+ * '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 unsigned long copy_strings(int argc,char ** argv,unsigned long *page,
- unsigned long p)
+static unsigned long copy_elf_strings(int argc,char ** argv, void **page,
+ unsigned long p)
{
char *tmp, *tmp1, *pag = NULL;
int len, offset = 0;
--p; --tmp; --len;
if (--offset < 0) {
offset = p % TARGET_PAGE_SIZE;
- pag = (char *) page[p/TARGET_PAGE_SIZE];
+ pag = (char *)page[p/TARGET_PAGE_SIZE];
if (!pag) {
- pag = (char *)get_free_page();
- page[p/TARGET_PAGE_SIZE] = (unsigned long)pag;
+ pag = (char *)malloc(TARGET_PAGE_SIZE);
+ page[p/TARGET_PAGE_SIZE] = pag;
if (!pag)
return 0;
}
return p;
}
-static int in_group_p(gid_t g)
-{
- /* return TRUE if we're in the specified group, FALSE otherwise */
- int ngroup;
- int i;
- gid_t grouplist[NGROUPS];
-
- ngroup = getgroups(NGROUPS, grouplist);
- for(i = 0; i < ngroup; i++) {
- if(grouplist[i] == g) {
- return 1;
- }
- }
- return 0;
-}
-
-static int count(char ** vec)
-{
- int i;
-
- for(i = 0; *vec; i++) {
- vec++;
- }
-
- return(i);
-}
-
-static int prepare_binprm(struct linux_binprm *bprm)
-{
- struct stat st;
- int mode;
- int retval, id_change;
-
- if(fstat(bprm->fd, &st) < 0) {
- return(-errno);
- }
-
- mode = st.st_mode;
- if(!S_ISREG(mode)) { /* Must be regular file */
- return(-EACCES);
- }
- if(!(mode & 0111)) { /* Must have at least one execute bit set */
- return(-EACCES);
- }
-
- bprm->e_uid = geteuid();
- bprm->e_gid = getegid();
- id_change = 0;
-
- /* Set-uid? */
- if(mode & S_ISUID) {
- bprm->e_uid = st.st_uid;
- if(bprm->e_uid != geteuid()) {
- id_change = 1;
- }
- }
-
- /* Set-gid? */
- /*
- * If setgid is set but no group execute bit then this
- * is a candidate for mandatory locking, not a setgid
- * executable.
- */
- if ((mode & (S_ISGID | S_IXGRP)) == (S_ISGID | S_IXGRP)) {
- bprm->e_gid = st.st_gid;
- if (!in_group_p(bprm->e_gid)) {
- id_change = 1;
- }
- }
-
- memset(bprm->buf, 0, sizeof(bprm->buf));
- retval = lseek(bprm->fd, 0L, SEEK_SET);
- if(retval >= 0) {
- retval = read(bprm->fd, bprm->buf, 128);
- }
- if(retval < 0) {
- perror("prepare_binprm");
- exit(-1);
- /* return(-errno); */
- }
- else {
- return(retval);
- }
-}
-
-unsigned long setup_arg_pages(unsigned long p, struct linux_binprm * bprm,
- struct image_info * info)
+unsigned long setup_arg_pages(target_ulong p, struct linux_binprm * bprm,
+ struct image_info * info)
{
- unsigned long stack_base, size, error;
+ target_ulong stack_base, size, error;
int i;
/* Create enough stack to hold everything. If we don't use
stack_base = error + size - MAX_ARG_PAGES*TARGET_PAGE_SIZE;
p += stack_base;
- if (bprm->loader) {
- bprm->loader += stack_base;
- }
- bprm->exec += stack_base;
-
for (i = 0 ; i < MAX_ARG_PAGES ; i++) {
if (bprm->page[i]) {
info->rss++;
- memcpy((void *)stack_base, (void *)bprm->page[i], TARGET_PAGE_SIZE);
- free_page((void *)bprm->page[i]);
+ memcpy_to_target(stack_base, bprm->page[i], TARGET_PAGE_SIZE);
+ free(bprm->page[i]);
}
- stack_base += TARGET_PAGE_SIZE;
+ stack_base += TARGET_PAGE_SIZE;
}
return p;
}
/* We need to explicitly zero any fractional pages after the data
section (i.e. bss). This would contain the junk from the file that
should not be in memory. */
-static void padzero(unsigned long elf_bss)
+static void padzero(unsigned long elf_bss, unsigned long last_bss)
{
unsigned long nbyte;
- char * fpnt;
+
+ if (elf_bss >= last_bss)
+ return;
/* XXX: this is really a hack : if the real host page size is
smaller than the target page size, some pages after the end
nbyte = elf_bss & (qemu_host_page_size-1);
if (nbyte) {
nbyte = qemu_host_page_size - nbyte;
- fpnt = (char *) elf_bss;
do {
- *fpnt++ = 0;
+ tput8(elf_bss, 0);
+ elf_bss++;
} while (--nbyte);
}
}
-static unsigned int * create_elf_tables(char *p, int argc, int envc,
- struct elfhdr * exec,
- unsigned long load_addr,
- unsigned long load_bias,
- unsigned long interp_load_addr, int ibcs,
- struct image_info *info)
+
+static unsigned long create_elf_tables(target_ulong p, int argc, int envc,
+ struct elfhdr * exec,
+ unsigned long load_addr,
+ unsigned long load_bias,
+ unsigned long interp_load_addr, int ibcs,
+ struct image_info *info)
{
- target_ulong *argv, *envp;
- target_ulong *sp, *csp;
- target_ulong *u_platform;
+ target_ulong sp;
+ int size;
+ target_ulong u_platform;
const char *k_platform;
- int v;
+ const int n = sizeof(target_ulong);
- /*
- * Force 16 byte _final_ alignment here for generality.
- */
- sp = (unsigned int *) (~15UL & (unsigned long) p);
- u_platform = NULL;
+ sp = p;
+ u_platform = 0;
k_platform = ELF_PLATFORM;
if (k_platform) {
size_t len = strlen(k_platform) + 1;
- sp -= (len + sizeof(target_ulong) - 1) / sizeof(target_ulong);
- u_platform = (target_ulong *)sp;
- __copy_to_user(u_platform, k_platform, len);
+ sp -= (len + n - 1) & ~(n - 1);
+ u_platform = sp;
+ memcpy_to_target(sp, k_platform, len);
}
- csp = sp;
- csp -= (DLINFO_ITEMS + 1) * 2;
+ /*
+ * Force 16 byte _final_ alignment here for generality.
+ */
+ sp = sp &~ (target_ulong)15;
+ size = (DLINFO_ITEMS + 1) * 2;
if (k_platform)
- csp -= 2;
+ size += 2;
#ifdef DLINFO_ARCH_ITEMS
- csp -= DLINFO_ARCH_ITEMS*2;
+ size += DLINFO_ARCH_ITEMS * 2;
#endif
- csp -= envc+1;
- csp -= argc+1;
- csp -= (!ibcs ? 3 : 1); /* argc itself */
- if ((unsigned long)csp & 15UL)
- sp -= ((unsigned long)csp & 15UL) / sizeof(*sp);
+ size += envc + argc + 2;
+ size += (!ibcs ? 3 : 1); /* argc itself */
+ size *= n;
+ if (size & 15)
+ sp -= 16 - (size & 15);
-#define NEW_AUX_ENT(id, val) \
- sp -= 2; \
- put_user (id, sp); \
- put_user (val, sp + 1)
+#define NEW_AUX_ENT(id, val) do { \
+ sp -= n; tputl(sp, val); \
+ sp -= n; tputl(sp, id); \
+ } while(0)
NEW_AUX_ENT (AT_NULL, 0);
/* There must be exactly DLINFO_ITEMS entries here. */
NEW_AUX_ENT(AT_EGID, (target_ulong) getegid());
NEW_AUX_ENT(AT_HWCAP, (target_ulong) ELF_HWCAP);
if (k_platform)
- NEW_AUX_ENT(AT_PLATFORM, (target_ulong) u_platform);
+ NEW_AUX_ENT(AT_PLATFORM, u_platform);
#ifdef ARCH_DLINFO
/*
* ARCH_DLINFO must come last so platform specific code can enforce
#endif
#undef NEW_AUX_ENT
- sp -= envc+1;
- envp = sp;
- sp -= argc+1;
- argv = sp;
- if (!ibcs) {
- put_user((target_ulong)envp,--sp);
- put_user((target_ulong)argv,--sp);
- }
- put_user(argc,--sp);
- info->arg_start = (unsigned int)((unsigned long)p & 0xffffffff);
- while (argc-->0) {
- put_user((target_ulong)p,argv++);
- do {
- get_user(v, p);
- p++;
- } while (v != 0);
- }
- put_user(0,argv);
- info->arg_end = info->env_start = (unsigned int)((unsigned long)p & 0xffffffff);
- while (envc-->0) {
- put_user((target_ulong)p,envp++);
- do {
- get_user(v, p);
- p++;
- } while (v != 0);
- }
- put_user(0,envp);
- info->env_end = (unsigned int)((unsigned long)p & 0xffffffff);
+ sp = loader_build_argptr(envc, argc, sp, p, !ibcs);
return sp;
}
-
static unsigned long load_elf_interp(struct elfhdr * interp_elf_ex,
int interpreter_fd,
unsigned long *interp_load_addr)
interpreter_fd,
eppnt->p_offset - TARGET_ELF_PAGEOFFSET(eppnt->p_vaddr));
- if (error > -1024UL) {
+ if (error == -1) {
/* Real error */
close(interpreter_fd);
free(elf_phdata);
* that there are zeromapped pages up to and including the last
* bss page.
*/
- padzero(elf_bss);
+ padzero(elf_bss, last_bss);
elf_bss = TARGET_ELF_PAGESTART(elf_bss + qemu_host_page_size - 1); /* What we have mapped so far */
/* Map the last of the bss segment */
syminfos = s;
}
-static int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
- struct image_info * info)
+int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
+ struct image_info * info)
{
struct elfhdr elf_ex;
struct elfhdr interp_elf_ex;
bswap_ehdr(&elf_ex);
#endif
- if (elf_ex.e_ident[0] != 0x7f ||
- strncmp(&elf_ex.e_ident[1], "ELF",3) != 0) {
- return -ENOEXEC;
- }
-
/* First of all, some simple consistency checks */
if ((elf_ex.e_type != ET_EXEC && elf_ex.e_type != ET_DYN) ||
(! elf_check_arch(elf_ex.e_machine))) {
return -ENOEXEC;
}
+ 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) {
+ retval = -E2BIG;
+ }
+
/* Now read in all of the header information */
elf_phdata = (struct elf_phdr *)malloc(elf_ex.e_phentsize*elf_ex.e_phnum);
if (elf_phdata == NULL) {
/* OK, we are done with that, now set up the arg stuff,
and then start this sucker up */
- if (!bprm->sh_bang) {
+ {
char * passed_p;
if (interpreter_type == INTERPRETER_AOUT) {
passed_p = passed_fileno;
if (elf_interpreter) {
- bprm->p = copy_strings(1,&passed_p,bprm->page,bprm->p);
+ bprm->p = copy_elf_strings(1,&passed_p,bprm->page,bprm->p);
bprm->argc++;
}
}
#ifdef LOW_ELF_STACK
info->start_stack = bprm->p = elf_stack - 4;
#endif
- bprm->p = (unsigned long)
- create_elf_tables((char *)bprm->p,
+ bprm->p = create_elf_tables(bprm->p,
bprm->argc,
bprm->envc,
&elf_ex,
interp_load_addr,
(interpreter_type == INTERPRETER_AOUT ? 0 : 1),
info);
- if (interpreter_type == INTERPRETER_AOUT)
- info->arg_start += strlen(passed_fileno) + 1;
info->start_brk = info->brk = elf_brk;
info->end_code = end_code;
info->start_code = start_code;
+ info->start_data = end_code;
info->end_data = end_data;
info->start_stack = bprm->p;
sections */
set_brk(elf_bss, elf_brk);
- padzero(elf_bss);
+ padzero(elf_bss, elf_brk);
#if 0
printf("(start_brk) %x\n" , info->start_brk);
MAP_FIXED | MAP_PRIVATE, -1, 0);
}
-#ifdef ELF_PLAT_INIT
- /*
- * The ABI may specify that certain registers be set up in special
- * ways (on i386 %edx is the address of a DT_FINI function, for
- * example. This macro performs whatever initialization to
- * the regs structure is required.
- */
- ELF_PLAT_INIT(regs);
-#endif
-
-
info->entry = elf_entry;
return 0;
}
-
-
-int elf_exec(const char * filename, char ** argv, char ** envp,
- struct target_pt_regs * regs, struct image_info *infop)
-{
- struct linux_binprm bprm;
- int retval;
- int i;
-
- bprm.p = TARGET_PAGE_SIZE*MAX_ARG_PAGES-sizeof(unsigned int);
- for (i=0 ; i<MAX_ARG_PAGES ; i++) /* clear page-table */
- bprm.page[i] = 0;
- retval = open(filename, O_RDONLY);
- if (retval < 0)
- return retval;
- bprm.fd = retval;
- bprm.filename = (char *)filename;
- bprm.sh_bang = 0;
- bprm.loader = 0;
- bprm.exec = 0;
- bprm.dont_iput = 0;
- bprm.argc = count(argv);
- bprm.envc = count(envp);
-
- retval = prepare_binprm(&bprm);
-
- if(retval>=0) {
- bprm.p = copy_strings(1, &bprm.filename, bprm.page, bprm.p);
- bprm.exec = bprm.p;
- bprm.p = copy_strings(bprm.envc,envp,bprm.page,bprm.p);
- bprm.p = copy_strings(bprm.argc,argv,bprm.page,bprm.p);
- if (!bprm.p) {
- retval = -E2BIG;
- }
- }
-
- if(retval>=0) {
- retval = load_elf_binary(&bprm,regs,infop);
- }
- if(retval>=0) {
- /* success. Initialize important registers */
- init_thread(regs, infop);
- return retval;
- }
-
- /* Something went wrong, return the inode and free the argument pages*/
- for (i=0 ; i<MAX_ARG_PAGES ; i++) {
- free_page((void *)bprm.page[i]);
- }
- return(retval);
-}
-
-
static int load_aout_interp(void * exptr, int interp_fd)
{
printf("a.out interpreter not yet supported\n");
return(0);
}
+void do_init_thread(struct target_pt_regs *regs, struct image_info *infop)
+{
+ init_thread(regs, infop);
+}
projects / qemu / blobdiff