X-Git-Url: http://git.maemo.org/git/?a=blobdiff_plain;f=elf_ops.h;h=485442a935404f8d6eaf6b904d91b8d276ba4614;hb=40ff16248e5a7a699386ed8b7ef462af9b8af3fa;hp=a7d027e1abbf28a5867d9ff2f20b03d42e99c992;hpb=5fe141fd30d35516eac3674f7b62be51ba34543f;p=qemu

diff --git a/elf_ops.h b/elf_ops.h
index a7d027e..485442a 100644
--- a/elf_ops.h
+++ b/elf_ops.h
@@ -49,7 +49,7 @@ static void glue(bswap_sym, SZ)(struct elf_sym *sym)
     bswap16s(&sym->st_shndx);
 }
 
-static struct elf_shdr *glue(find_section, SZ)(struct elf_shdr *shdr_table, 
+static struct elf_shdr *glue(find_section, SZ)(struct elf_shdr *shdr_table,
                                                int n, int type)
 {
     int i;
@@ -60,28 +60,63 @@ static struct elf_shdr *glue(find_section, SZ)(struct elf_shdr *shdr_table,
     return NULL;
 }
 
+static int glue(symfind, SZ)(const void *s0, const void *s1)
+{
+    struct elf_sym *key = (struct elf_sym *)s0;
+    struct elf_sym *sym = (struct elf_sym *)s1;
+    int result = 0;
+    if (key->st_value < sym->st_value) {
+        result = -1;
+    } else if (key->st_value > sym->st_value + sym->st_size) {
+        result = 1;
+    }
+    return result;
+}
+
+static const char *glue(lookup_symbol, SZ)(struct syminfo *s, target_ulong orig_addr)
+{
+    struct elf_sym *syms = glue(s->disas_symtab.elf, SZ);
+    struct elf_sym key;
+    struct elf_sym *sym;
+
+    key.st_value = orig_addr;
+
+    sym = bsearch(&key, syms, s->disas_num_syms, sizeof(*syms), glue(symfind, SZ));
+    if (sym != 0) {
+        return s->disas_strtab + sym->st_name;
+    }
+
+    return "";
+}
+
+static int glue(symcmp, SZ)(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);
+}
+
 static int glue(load_symbols, SZ)(struct elfhdr *ehdr, int fd, int must_swab)
 {
     struct elf_shdr *symtab, *strtab, *shdr_table = NULL;
     struct elf_sym *syms = NULL;
-#if (SZ == 64)
-    struct elf32_sym *syms32 = NULL;
-#endif
     struct syminfo *s;
     int nsyms, i;
     char *str = NULL;
 
-    shdr_table = load_at(fd, ehdr->e_shoff, 
+    shdr_table = load_at(fd, ehdr->e_shoff,
                          sizeof(struct elf_shdr) * ehdr->e_shnum);
     if (!shdr_table)
         return -1;
-    
+
     if (must_swab) {
         for (i = 0; i < ehdr->e_shnum; i++) {
             glue(bswap_shdr, SZ)(shdr_table + i);
         }
     }
-        
+
     symtab = glue(find_section, SZ)(shdr_table, ehdr->e_shnum, SHT_SYMTAB);
     if (!symtab)
         goto fail;
@@ -90,21 +125,32 @@ static int glue(load_symbols, SZ)(struct elfhdr *ehdr, int fd, int must_swab)
         goto fail;
 
     nsyms = symtab->sh_size / sizeof(struct elf_sym);
-#if (SZ == 64)
-    syms32 = qemu_mallocz(nsyms * sizeof(struct elf32_sym));
-#endif
-    for (i = 0; i < nsyms; i++) {
+
+    i = 0;
+    while (i < nsyms) {
         if (must_swab)
             glue(bswap_sym, SZ)(&syms[i]);
-#if (SZ == 64)
-	syms32[i].st_name = syms[i].st_name;
-	syms32[i].st_info = syms[i].st_info;
-	syms32[i].st_other = syms[i].st_other;
-	syms32[i].st_shndx = syms[i].st_shndx;
-	syms32[i].st_value = syms[i].st_value & 0xffffffff;
-	syms32[i].st_size = syms[i].st_size & 0xffffffff;
+        /* We are only interested in function symbols.
+           Throw everything else away.  */
+        if (syms[i].st_shndx == SHN_UNDEF ||
+                syms[i].st_shndx >= SHN_LORESERVE ||
+                ELF_ST_TYPE(syms[i].st_info) != STT_FUNC) {
+            nsyms--;
+            if (i < nsyms) {
+                syms[i] = syms[nsyms];
+            }
+            continue;
+        }
+#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
+        i++;
     }
+    syms = qemu_realloc(syms, nsyms * sizeof(*syms));
+
+    qsort(syms, nsyms, sizeof(*syms), glue(symcmp, SZ));
+
     /* String table */
     if (symtab->sh_link >= ehdr->e_shnum)
         goto fail;
@@ -112,16 +158,12 @@ static int glue(load_symbols, SZ)(struct elfhdr *ehdr, int fd, int must_swab)
 
     str = load_at(fd, strtab->sh_offset, strtab->sh_size);
     if (!str)
-	goto fail;
+        goto fail;
 
     /* Commit */
     s = qemu_mallocz(sizeof(*s));
-#if (SZ == 64)
-    s->disas_symtab = syms32;
-    qemu_free(syms);
-#else
-    s->disas_symtab = syms;
-#endif
+    s->lookup_symbol = glue(lookup_symbol, SZ);
+    glue(s->disas_symtab.elf, SZ) = syms;
     s->disas_num_syms = nsyms;
     s->disas_strtab = str;
     s->next = syminfos;
@@ -129,22 +171,22 @@ static int glue(load_symbols, SZ)(struct elfhdr *ehdr, int fd, int must_swab)
     qemu_free(shdr_table);
     return 0;
  fail:
-#if (SZ == 64)
-    qemu_free(syms32);
-#endif
     qemu_free(syms);
     qemu_free(str);
     qemu_free(shdr_table);
     return -1;
 }
 
-int glue(load_elf, SZ)(int fd, int64_t virt_to_phys_addend, int must_swab)
+static int glue(load_elf, SZ)(int fd, int64_t address_offset,
+                              int must_swab, uint64_t *pentry,
+                              uint64_t *lowaddr, uint64_t *highaddr)
 {
     struct elfhdr ehdr;
     struct elf_phdr *phdr = NULL, *ph;
     int size, i, total_size;
-    elf_word mem_size, addr;
-    uint8_t *data;
+    elf_word mem_size;
+    uint64_t addr, low = 0, high = 0;
+    uint8_t *data = NULL;
 
     if (read(fd, &ehdr, sizeof(ehdr)) != sizeof(ehdr))
         goto fail;
@@ -152,6 +194,25 @@ int glue(load_elf, SZ)(int fd, int64_t virt_to_phys_addend, int must_swab)
         glue(bswap_ehdr, SZ)(&ehdr);
     }
 
+    switch (ELF_MACHINE) {
+        case EM_PPC64:
+            if (EM_PPC64 != ehdr.e_machine)
+                if (EM_PPC != ehdr.e_machine)
+                    goto fail;
+            break;
+        case EM_X86_64:
+            if (EM_X86_64 != ehdr.e_machine)
+                if (EM_386 != ehdr.e_machine)
+                    goto fail;
+            break;
+        default:
+            if (ELF_MACHINE != ehdr.e_machine)
+                goto fail;
+    }
+
+    if (pentry)
+   	*pentry = (uint64_t)(elf_sword)ehdr.e_entry;
+
     glue(load_symbols, SZ)(&ehdr, fd, must_swab);
 
     size = ehdr.e_phnum * sizeof(phdr[0]);
@@ -167,7 +228,7 @@ int glue(load_elf, SZ)(int fd, int64_t virt_to_phys_addend, int must_swab)
             glue(bswap_phdr, SZ)(ph);
         }
     }
-    
+
     total_size = 0;
     for(i = 0; i < ehdr.e_phnum; i++) {
         ph = &phdr[i];
@@ -176,22 +237,35 @@ int glue(load_elf, SZ)(int fd, int64_t virt_to_phys_addend, int must_swab)
             /* XXX: avoid allocating */
             data = qemu_mallocz(mem_size);
             if (ph->p_filesz > 0) {
-                lseek(fd, ph->p_offset, SEEK_SET);
+                if (lseek(fd, ph->p_offset, SEEK_SET) < 0)
+                    goto fail;
                 if (read(fd, data, ph->p_filesz) != ph->p_filesz)
                     goto fail;
             }
-            addr = ph->p_vaddr + virt_to_phys_addend;
+            /* address_offset is hack for kernel images that are
+               linked at the wrong physical address.  */
+            addr = ph->p_paddr + address_offset;
 
             cpu_physical_memory_write_rom(addr, data, mem_size);
 
             total_size += mem_size;
+            if (!low || addr < low)
+                low = addr;
+            if (!high || (addr + mem_size) > high)
+                high = addr + mem_size;
 
             qemu_free(data);
+            data = NULL;
         }
     }
+    qemu_free(phdr);
+    if (lowaddr)
+        *lowaddr = (uint64_t)(elf_sword)low;
+    if (highaddr)
+        *highaddr = (uint64_t)(elf_sword)high;
     return total_size;
  fail:
+    qemu_free(data);
     qemu_free(phdr);
     return -1;
 }
-