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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] [POWERPC][XEN] Use libelf for dom0 construction.
# HG changeset patch
# User Hollis Blanchard <hollisb@xxxxxxxxxx>
# Date 1171053802 21600
# Node ID aea80dbf6d96cbddbb652e7c4ef642778605ba76
# Parent 632d8e57690064e0ff2a8271f6544916a9343f06
[POWERPC][XEN] Use libelf for dom0 construction.
- Remove old 32-bit ELF loader hack.
Signed-off-by: Hollis Blanchard <hollisb@xxxxxxxxxx>
---
xen/arch/powerpc/elf32.c | 7 -
xen/arch/powerpc/Makefile | 2
xen/arch/powerpc/domain_build.c | 190 ++++++++++++----------------------------
3 files changed, 60 insertions(+), 139 deletions(-)
diff -r 632d8e576900 -r aea80dbf6d96 xen/arch/powerpc/Makefile
--- a/xen/arch/powerpc/Makefile Fri Feb 09 14:43:22 2007 -0600
+++ b/xen/arch/powerpc/Makefile Fri Feb 09 14:43:22 2007 -0600
@@ -51,8 +51,6 @@ obj-$(builtin_dom0) += dom0.o
obj-y += firmware_image.o
-obj-y += elf32.o
-
# These are extra warnings like for the arch/ppc directory but may not
# allow the rest of the tree to build.
PPC_C_WARNINGS += -Wundef -Wmissing-prototypes -Wmissing-declarations
diff -r 632d8e576900 -r aea80dbf6d96 xen/arch/powerpc/domain_build.c
--- a/xen/arch/powerpc/domain_build.c Fri Feb 09 14:43:22 2007 -0600
+++ b/xen/arch/powerpc/domain_build.c Fri Feb 09 14:43:22 2007 -0600
@@ -20,7 +20,6 @@
#include <xen/config.h>
#include <xen/lib.h>
-#include <xen/elf.h>
#include <xen/sched.h>
#include <xen/init.h>
#include <xen/ctype.h>
@@ -31,10 +30,8 @@
#include <asm/processor.h>
#include <asm/papr.h>
#include <public/arch-powerpc.h>
+#include <public/libelf.h>
#include "oftree.h"
-
-extern int parseelfimage_32(struct domain_setup_info *dsi);
-extern int loadelfimage_32(struct domain_setup_info *dsi);
/* opt_dom0_mem: memory allocated to domain 0. */
static unsigned int dom0_nrpages;
@@ -53,63 +50,18 @@ static unsigned int opt_dom0_shadow;
static unsigned int opt_dom0_shadow;
boolean_param("dom0_shadow", opt_dom0_shadow);
-int elf_sanity_check(const Elf_Ehdr *ehdr)
-{
- if (IS_ELF(*ehdr))
- /* we are happy with either */
- if ((ehdr->e_ident[EI_CLASS] == ELFCLASS32
- && ehdr->e_machine == EM_PPC)
- || (ehdr->e_ident[EI_CLASS] == ELFCLASS64
- && ehdr->e_machine == EM_PPC64)) {
- if (ehdr->e_ident[EI_DATA] == ELFDATA2MSB
- && ehdr->e_type == ET_EXEC)
- return 1;
- }
- printk("DOM0 image is not a Xen-compatible Elf image.\n");
- return 0;
-}
-
/* adapted from common/elf.c */
#define RM_MASK(a,l) ((a) & ((1UL << (l)) - 1))
-
-static int rm_loadelfimage_64(struct domain_setup_info *dsi, ulong rma)
-{
- char *elfbase = (char *)dsi->image_addr;
- Elf64_Ehdr *ehdr = (Elf64_Ehdr *)dsi->image_addr;
- Elf64_Phdr *phdr;
- int h;
-
- for (h = 0; h < ehdr->e_phnum; h++ )
- {
- phdr = (Elf64_Phdr *)(elfbase + ehdr->e_phoff + (h*ehdr->e_phentsize));
- if (!((phdr->p_type == PT_LOAD) &&
- ((phdr->p_flags & (PF_W|PF_X)) != 0)))
- continue;
-
- if (phdr->p_filesz != 0)
- memcpy((char *)(rma + RM_MASK(phdr->p_paddr, 42)),
- elfbase + phdr->p_offset,
- phdr->p_filesz);
- if (phdr->p_memsz > phdr->p_filesz)
- memset((char *)(rma + RM_MASK(phdr->p_paddr, 42) + phdr->p_filesz),
- 0, phdr->p_memsz - phdr->p_filesz);
- }
-
-#ifdef NOT_YET
- loadelfsymtab(dsi, 1);
-#endif
-
- return 0;
-}
int construct_dom0(struct domain *d,
unsigned long image_start, unsigned long image_len,
unsigned long initrd_start, unsigned long initrd_len,
char *cmdline)
{
+ struct elf_binary elf;
+ struct elf_dom_parms parms;
int rc;
struct vcpu *v = d->vcpu[0];
- struct domain_setup_info dsi;
ulong dst;
u64 *ofh_tree;
uint rma_nrpages = 1 << d->arch.rma_order;
@@ -117,11 +69,7 @@ int construct_dom0(struct domain *d,
ulong rma = page_to_maddr(d->arch.rma_page);
start_info_t *si;
ulong eomem;
- int am64 = 1;
int preempt = 0;
- ulong msr;
- ulong pc;
- ulong r2;
int vcpu;
/* Sanity! */
@@ -133,26 +81,27 @@ int construct_dom0(struct domain *d,
cpu_init_vcpu(v);
- memset(&dsi, 0, sizeof(struct domain_setup_info));
- dsi.image_addr = image_start;
- dsi.image_len = image_len;
-
- printk("Trying Dom0 as 64bit ELF\n");
- if ((rc = parseelfimage(&dsi)) != 0) {
- printk("Trying Dom0 as 32bit ELF\n");
- if ((rc = parseelfimage_32(&dsi)) != 0)
- return rc;
- am64 = 0;
- }
+ printk("*** LOADING DOMAIN 0 ***\n");
+
+ rc = elf_init(&elf, (void *)image_start, image_len);
+ if (rc)
+ return rc;
+#ifdef VERBOSE
+ elf_set_verbose(&elf);
+#endif
+ elf_parse_binary(&elf);
+ if (0 != (elf_xen_parse(&elf, &parms)))
+ return rc;
+
+ printk("Dom0 kernel: %s, paddr 0x%" PRIx64 " -> 0x%" PRIx64 "\n",
+ elf_64bit(&elf) ? "64-bit" : "32-bit",
+ elf.pstart, elf.pend);
/* elf contains virtual addresses that can have the upper bits
* masked while running in real mode, so we do the masking as well
* as well */
- dsi.v_kernstart = RM_MASK(dsi.v_kernstart, 42);
- dsi.v_kernend = RM_MASK(dsi.v_kernend, 42);
- dsi.v_kernentry = RM_MASK(dsi.v_kernentry, 42);
-
- printk("*** LOADING DOMAIN 0 ***\n");
+ parms.virt_kend = RM_MASK(parms.virt_kend, 42);
+ parms.virt_entry = RM_MASK(parms.virt_entry, 42);
/* By default DOM0 is allocated all available memory. */
d->max_pages = ~0U;
@@ -253,75 +202,56 @@ int construct_dom0(struct domain *d,
printk("loading OFD: 0x%lx RMA: 0x%lx, 0x%lx\n", dst, dst - rma,
oftree_len);
memcpy((void *)dst, (void *)oftree, oftree_len);
-
dst = ALIGN_UP(dst + oftree_len, PAGE_SIZE);
- if (am64) {
- ulong kbase;
- ulong *fdesc;
-
- printk("loading 64-bit Dom0: 0x%lx, in RMA:0x%lx\n", dst, dst - rma);
- rm_loadelfimage_64(&dsi, dst);
-
- kbase = dst;
- /* move dst to end of bss */
- dst = ALIGN_UP(dsi.v_kernend + dst, PAGE_SIZE);
-
- if ( initrd_len > 0 ) {
- ASSERT( (dst - rma) + image_len < eomem );
-
- printk("loading initrd: 0x%lx, 0x%lx\n", dst, initrd_len);
- memcpy((void *)dst, (void *)initrd_start, initrd_len);
-
- si->mod_start = dst - rma;
- si->mod_len = image_len;
-
- dst = ALIGN_UP(dst + initrd_len, PAGE_SIZE);
- } else {
- printk("no initrd\n");
- si->mod_start = 0;
- si->mod_len = 0;
- }
- /* it may be a function descriptor */
- fdesc = (ulong *)(dsi.v_kernstart + dsi.v_kernentry + kbase);
-
- if (fdesc[2] == 0
- && ((fdesc[0] >= dsi.v_kernstart)
- && (fdesc[0] < dsi.v_kernend)) /* text entry is in range */
- && ((fdesc[1] >= dsi.v_kernstart) /* toc can be > image */
- && (fdesc[1] < (dsi.v_kernend + (0x7fff * sizeof (ulong)))))) {
- /* it is almost certainly a function descriptor */
- pc = RM_MASK(fdesc[0], 42) + kbase - rma;
- r2 = RM_MASK(fdesc[1], 42) + kbase - rma;
- } else {
- pc = ((ulong)fdesc) - rma;
- r2 = 0;
- }
- msr = MSR_SF;
+ /* Load the dom0 kernel. */
+ elf.dest = (void *)dst;
+ elf_load_binary(&elf);
+ v->arch.ctxt.pc = dst - rma;
+ dst = ALIGN_UP(dst + parms.virt_kend, PAGE_SIZE);
+
+ /* Load the initrd. */
+ if (initrd_len > 0) {
+ ASSERT((dst - rma) + image_len < eomem);
+
+ printk("loading initrd: 0x%lx, 0x%lx\n", dst, initrd_len);
+ memcpy((void *)dst, (void *)initrd_start, initrd_len);
+
+ si->mod_start = dst - rma;
+ si->mod_len = image_len;
+
+ dst = ALIGN_UP(dst + initrd_len, PAGE_SIZE);
} else {
- printk("loading 32-bit Dom0: 0x%lx, in RMA:0x%lx\n",
- dsi.v_kernstart + rma, dsi.v_kernstart);
- dsi.v_start = rma;
- loadelfimage_32(&dsi);
-
- pc = dsi.v_kernentry;
- r2 = 0;
- msr = 0;
- }
-
+ printk("no initrd\n");
+ si->mod_start = 0;
+ si->mod_len = 0;
+ }
+
+ if (elf_64bit(&elf)) {
+ v->arch.ctxt.msr = MSR_SF;
+ } else {
+ v->arch.ctxt.msr = 0;
+ }
+ v->arch.ctxt.gprs[2] = 0;
v->arch.ctxt.gprs[3] = si->mod_start;
v->arch.ctxt.gprs[4] = si->mod_len;
+
+ printk("dom0 initial register state:\n"
+ " pc %016lx msr %016lx\n"
+ " r1 %016lx r2 %016lx r3 %016lx\n"
+ " r4 %016lx r5 %016lx\n",
+ v->arch.ctxt.pc,
+ v->arch.ctxt.msr,
+ v->arch.ctxt.gprs[1],
+ v->arch.ctxt.gprs[2],
+ v->arch.ctxt.gprs[3],
+ v->arch.ctxt.gprs[4],
+ v->arch.ctxt.gprs[5]);
memset(si->cmd_line, 0, sizeof(si->cmd_line));
if ( cmdline != NULL )
strlcpy((char *)si->cmd_line, cmdline, sizeof(si->cmd_line));
- v->arch.ctxt.msr = msr;
- v->arch.ctxt.pc = pc;
- v->arch.ctxt.gprs[2] = r2;
-
- printk("DOM: pc = 0x%lx, r2 = 0x%lx\n", pc, r2);
-
ofd_dom0_fixup(d, *ofh_tree + rma, si);
set_bit(_VCPUF_initialised, &v->vcpu_flags);
diff -r 632d8e576900 -r aea80dbf6d96 xen/arch/powerpc/elf32.c
--- a/xen/arch/powerpc/elf32.c Fri Feb 09 14:43:22 2007 -0600
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,7 +0,0 @@
-#define parseelfimage parseelfimage_32
-#define loadelfimage loadelfimage_32
-#define xen_elfnote_string xen_elfnote_string32
-#define xen_elfnote_numeric xen_elfnote_numeric32
-#define ELFSIZE 32
-#include "../../common/elf.c"
-
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