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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] Clean up symtab loading in elf loader.
ChangeSet 1.1442, 2005/04/03 12:22:11+01:00, kaf24@viper.(none)
Clean up symtab loading in elf loader.
Signed-off-by: Keir Fraser <keir@xxxxxxxxxxxxx>
tools/libxc/xc_linux_build.c | 29 +++++-----
tools/libxc/xc_vmx_build.c | 117 -------------------------------------------
xen/arch/x86/domain_build.c | 13 +---
xen/common/elf.c | 114 +++++++++++++++++++++--------------------
xen/include/xen/elf.h | 5 -
xen/include/xen/sched.h | 9 ++-
6 files changed, 85 insertions(+), 202 deletions(-)
diff -Nru a/tools/libxc/xc_linux_build.c b/tools/libxc/xc_linux_build.c
--- a/tools/libxc/xc_linux_build.c 2005-04-03 08:03:09 -04:00
+++ b/tools/libxc/xc_linux_build.c 2005-04-03 08:03:09 -04:00
@@ -22,8 +22,7 @@
unsigned long v_kernend;
unsigned long v_kernentry;
- unsigned int load_bsd_symtab;
-
+ unsigned int load_symtab;
unsigned long symtab_addr;
unsigned long symtab_len;
};
@@ -34,7 +33,7 @@
static int
loadelfimage(
char *elfbase, int xch, u32 dom, unsigned long *parray,
- unsigned long vstart);
+ struct domain_setup_info *dsi);
static int
loadelfsymtab(
char *elfbase, int xch, u32 dom, unsigned long *parray,
@@ -87,9 +86,6 @@
if ( rc != 0 )
goto error_out;
- if (dsi.load_bsd_symtab)
- loadelfsymtab(image, xc_handle, dom, NULL, &dsi);
-
if ( (dsi.v_start & (PAGE_SIZE-1)) != 0 )
{
PERROR("Guest OS must load to a page boundary.\n");
@@ -160,10 +156,7 @@
goto error_out;
}
- loadelfimage(image, xc_handle, dom, page_array, dsi.v_start);
-
- if (dsi.load_bsd_symtab)
- loadelfsymtab(image, xc_handle, dom, page_array, &dsi);
+ loadelfimage(image, xc_handle, dom, page_array, &dsi);
/* Load the initial ramdisk image. */
if ( initrd_len != 0 )
@@ -581,21 +574,22 @@
dsi->v_start = strtoul(p+10, &p, 0);
if ( (p = strstr(guestinfo, "BSD_SYMTAB")) != NULL )
- dsi->load_bsd_symtab = 1;
+ dsi->load_symtab = 1;
dsi->v_kernstart = kernstart;
dsi->v_kernend = kernend;
dsi->v_kernentry = ehdr->e_entry;
-
dsi->v_end = dsi->v_kernend;
+ loadelfsymtab(elfbase, 0, 0, NULL, dsi);
+
return 0;
}
static int
loadelfimage(
char *elfbase, int xch, u32 dom, unsigned long *parray,
- unsigned long vstart)
+ struct domain_setup_info *dsi)
{
Elf_Ehdr *ehdr = (Elf_Ehdr *)elfbase;
Elf_Phdr *phdr;
@@ -612,7 +606,7 @@
for ( done = 0; done < phdr->p_filesz; done += chunksz )
{
- pa = (phdr->p_paddr + done) - vstart;
+ pa = (phdr->p_paddr + done) - dsi->v_start;
va = xc_map_foreign_range(
xch, dom, PAGE_SIZE, PROT_WRITE, parray[pa>>PAGE_SHIFT]);
chunksz = phdr->p_filesz - done;
@@ -625,7 +619,7 @@
for ( ; done < phdr->p_memsz; done += chunksz )
{
- pa = (phdr->p_paddr + done) - vstart;
+ pa = (phdr->p_paddr + done) - dsi->v_start;
va = xc_map_foreign_range(
xch, dom, PAGE_SIZE, PROT_WRITE, parray[pa>>PAGE_SHIFT]);
chunksz = phdr->p_memsz - done;
@@ -636,6 +630,8 @@
}
}
+ loadelfsymtab(elfbase, xch, dom, parray, dsi);
+
return 0;
}
@@ -651,6 +647,9 @@
unsigned long maxva, symva;
char *p;
int h, i;
+
+ if ( !dsi->load_symtab )
+ return 0;
p = malloc(sizeof(int) + sizeof(Elf_Ehdr) +
ehdr->e_shnum * sizeof(Elf_Shdr));
diff -Nru a/tools/libxc/xc_vmx_build.c b/tools/libxc/xc_vmx_build.c
--- a/tools/libxc/xc_vmx_build.c 2005-04-03 08:03:09 -04:00
+++ b/tools/libxc/xc_vmx_build.c 2005-04-03 08:03:09 -04:00
@@ -26,11 +26,6 @@
unsigned long v_kernstart;
unsigned long v_kernend;
unsigned long v_kernentry;
-
- unsigned int load_bsd_symtab;
-
- unsigned long symtab_addr;
- unsigned long symtab_len;
};
static int
@@ -40,10 +35,6 @@
loadelfimage(
char *elfbase, int xch, u32 dom, unsigned long *parray,
unsigned long vstart);
-static int
-loadelfsymtab(
- char *elfbase, int xch, u32 dom, unsigned long *parray,
- struct domain_setup_info *dsi);
static void build_e820map(struct mem_map *mem_mapp, unsigned long mem_size)
{
@@ -193,13 +184,9 @@
memset(&dsi, 0, sizeof(struct domain_setup_info));
- rc = parseelfimage(image, image_size, &dsi);
- if ( rc != 0 )
+ if ( (rc = parseelfimage(image, image_size, &dsi)) != 0 )
goto error_out;
- if (dsi.load_bsd_symtab)
- loadelfsymtab(image, xc_handle, dom, NULL, &dsi);
-
if ( (dsi.v_start & (PAGE_SIZE-1)) != 0 )
{
PERROR("Guest OS must load to a page boundary.\n");
@@ -269,9 +256,6 @@
loadelfimage(image, xc_handle, dom, page_array, dsi.v_start);
- if (dsi.load_bsd_symtab)
- loadelfsymtab(image, xc_handle, dom, page_array, &dsi);
-
/* Load the initial ramdisk image. */
if ( initrd_len != 0 )
{
@@ -708,7 +692,6 @@
}
dsi->v_start = 0x00000000;
- dsi->load_bsd_symtab = 0;
dsi->v_kernstart = kernstart - LINUX_PAGE_OFFSET;
dsi->v_kernend = kernend - LINUX_PAGE_OFFSET;
@@ -766,104 +749,6 @@
munmap(va, PAGE_SIZE);
}
}
-
- return 0;
-}
-
-
-#define ELFROUND (ELFSIZE / 8)
-
-static int
-loadelfsymtab(
- char *elfbase, int xch, u32 dom, unsigned long *parray,
- struct domain_setup_info *dsi)
-{
- Elf_Ehdr *ehdr = (Elf_Ehdr *)elfbase, *sym_ehdr;
- Elf_Shdr *shdr;
- unsigned long maxva, symva;
- char *p;
- int h, i;
-
- p = malloc(sizeof(int) + sizeof(Elf_Ehdr) +
- ehdr->e_shnum * sizeof(Elf_Shdr));
- if (p == NULL)
- return 0;
-
- maxva = (dsi->v_kernend + ELFROUND - 1) & ~(ELFROUND - 1);
- symva = maxva;
- maxva += sizeof(int);
- dsi->symtab_addr = maxva;
- dsi->symtab_len = 0;
- maxva += sizeof(Elf_Ehdr) + ehdr->e_shnum * sizeof(Elf_Shdr);
- maxva = (maxva + ELFROUND - 1) & ~(ELFROUND - 1);
-
- shdr = (Elf_Shdr *)(p + sizeof(int) + sizeof(Elf_Ehdr));
- memcpy(shdr, elfbase + ehdr->e_shoff, ehdr->e_shnum * sizeof(Elf_Shdr));
-
- for ( h = 0; h < ehdr->e_shnum; h++ )
- {
- if ( shdr[h].sh_type == SHT_STRTAB )
- {
- /* Look for a strtab @i linked to symtab @h. */
- for ( i = 0; i < ehdr->e_shnum; i++ )
- if ( (shdr[i].sh_type == SHT_SYMTAB) &&
- (shdr[i].sh_link == h) )
- break;
- /* Skip symtab @h if we found no corresponding strtab @i. */
- if ( i == ehdr->e_shnum )
- {
- shdr[h].sh_offset = 0;
- continue;
- }
- }
-
- if ( (shdr[h].sh_type == SHT_STRTAB) ||
- (shdr[h].sh_type == SHT_SYMTAB) )
- {
- if ( parray != NULL )
- xc_map_memcpy(maxva, elfbase + shdr[h].sh_offset,
shdr[h].sh_size,
- xch, dom, parray, dsi->v_start);
-
- /* Mangled to be based on ELF header location. */
- shdr[h].sh_offset = maxva - dsi->symtab_addr;
-
- dsi->symtab_len += shdr[h].sh_size;
- maxva += shdr[h].sh_size;
- maxva = (maxva + ELFROUND - 1) & ~(ELFROUND - 1);
- }
-
- shdr[h].sh_name = 0; /* Name is NULL. */
- }
-
- if ( dsi->symtab_len == 0 )
- {
- dsi->symtab_addr = 0;
- goto out;
- }
-
- if ( parray != NULL )
- {
- *(int *)p = maxva - dsi->symtab_addr;
- sym_ehdr = (Elf_Ehdr *)(p + sizeof(int));
- memcpy(sym_ehdr, ehdr, sizeof(Elf_Ehdr));
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