Changeset 75dd55d in mainline for kernel/generic/src/lib/elf.c

Timestamp:

2007-10-26T19:34:27Z (17 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

a228687

Parents:

c4e75ea

Message:

Fix elf.c's formatting and add code that can be later enhanced and used to
remember task's TLS section alignment, address and size.

File:

• kernel/generic/src/lib/elf.c (modified) (9 diffs)

kernel/generic/src/lib/elf.c

@@ -57 +57 @@
 };
 
-static int segment_header(elf_segment_header_t *entry, elf_header_t *elf, as_t *as);
-static int section_header(elf_section_header_t *entry, elf_header_t *elf, as_t *as);
-static int load_segment(elf_segment_header_t *entry, elf_header_t *elf, as_t *as);
+static int segment_header(elf_segment_header_t *entry, elf_header_t *elf,
+    as_t *as);
+static int section_header(elf_section_header_t *entry, elf_header_t *elf,
+    as_t *as);
+static int load_segment(elf_segment_header_t *entry, elf_header_t *elf,
+    as_t *as);
 
 /** ELF loader
@@ -72 +75 @@
 
         /* Identify ELF */
-        if (header->e_ident[EI_MAG0] != ELFMAG0 || header->e_ident[EI_MAG1] != ELFMAG1 || 
-            header->e_ident[EI_MAG2] != ELFMAG2 || header->e_ident[EI_MAG3] != ELFMAG3) {
+        if (header->e_ident[EI_MAG0] != ELFMAG0 ||
+            header->e_ident[EI_MAG1] != ELFMAG1 || 
+            header->e_ident[EI_MAG2] != ELFMAG2 ||
+            header->e_ident[EI_MAG3] != ELFMAG3) {
                 return EE_INVALID;
         }
         
         /* Identify ELF compatibility */
-        if (header->e_ident[EI_DATA] != ELF_DATA_ENCODING || header->e_machine != ELF_MACHINE || 
-            header->e_ident[EI_VERSION] != EV_CURRENT || header->e_version != EV_CURRENT ||
+        if (header->e_ident[EI_DATA] != ELF_DATA_ENCODING ||
+            header->e_machine != ELF_MACHINE || 
+            header->e_ident[EI_VERSION] != EV_CURRENT ||
+            header->e_version != EV_CURRENT ||
             header->e_ident[EI_CLASS] != ELF_CLASS) {
                 return EE_INCOMPATIBLE;
@@ -96 +103 @@
         /* Walk through all segment headers and process them. */
         for (i = 0; i < header->e_phnum; i++) {
-                rc = segment_header(&((elf_segment_header_t *)(((uint8_t *) header) + header->e_phoff))[i], header, as);
+                elf_segment_header_t *seghdr;
+
+                seghdr = &((elf_segment_header_t *)(((uint8_t *) header) +
+                    header->e_phoff))[i];
+                rc = segment_header(seghdr, header, as);
                 if (rc != EE_OK)
                         return rc;
@@ -103 +114 @@
         /* Inspect all section headers and proccess them. */
         for (i = 0; i < header->e_shnum; i++) {
-                rc = section_header(&((elf_section_header_t *)(((uint8_t *) header) + header->e_shoff))[i], header, as);
+                elf_section_header_t *sechdr;
+
+                sechdr = &((elf_section_header_t *)(((uint8_t *) header) +
+                    header->e_shoff))[i];
+                rc = section_header(sechdr, header, as);
                 if (rc != EE_OK)
                         return rc;
@@ -119 +134 @@
 char *elf_error(int rc)
 {
-        ASSERT(rc < sizeof(error_codes)/sizeof(char *));
+        ASSERT(rc < sizeof(error_codes) / sizeof(char *));
 
         return error_codes[rc];
@@ -132 +147 @@
  * @return EE_OK on success, error code otherwise.
  */
-static int segment_header(elf_segment_header_t *entry, elf_header_t *elf, as_t *as)
+static int segment_header(elf_segment_header_t *entry, elf_header_t *elf,
+    as_t *as)
 {
         switch (entry->p_type) {
@@ -172 +188 @@
 
         if (entry->p_align > 1) {
-                if ((entry->p_offset % entry->p_align) != (entry->p_vaddr % entry->p_align)) {
+                if ((entry->p_offset % entry->p_align) !=
+                    (entry->p_vaddr % entry->p_align)) {
                         return EE_INVALID;
                 }
@@ -191 +208 @@
                 return EE_UNSUPPORTED;
 
-        a = as_area_create(as, flags, entry->p_memsz, entry->p_vaddr, AS_AREA_ATTR_NONE,
-                &elf_backend, &backend_data);
+        a = as_area_create(as, flags, entry->p_memsz, entry->p_vaddr,
+            AS_AREA_ATTR_NONE, &elf_backend, &backend_data);
         if (!a)
                 return EE_MEMORY;
@@ -211 +228 @@
  * @return EE_OK on success, error code otherwise.
  */
-static int section_header(elf_section_header_t *entry, elf_header_t *elf, as_t *as)
+static int section_header(elf_section_header_t *entry, elf_header_t *elf,
+    as_t *as)
 {
         switch (entry->sh_type) {
+        case SHT_PROGBITS:
+                if (entry->sh_flags & SHF_TLS) {
+                        /* .tdata */
+                }
+                break;
+        case SHT_NOBITS:
+                if (entry->sh_flags & SHF_TLS) {
+                        /* .tbss */
+                }
+                break;
         default:
                 break;