[RFC,1/3] libelf: Introduce phys_kstart/end

Commit Message

Jason Andryuk May 14, 2021, 3:17 p.m. UTC

The physical start and end matter for PVH.  These are only used by a PVH
dom0, but will help when separating the PV and PVH ELF checking in the
next patch.

Signed-off-by: Jason Andryuk <[e-mail]>
---
 xen/arch/x86/hvm/dom0_build.c      | 4 ++--
 xen/common/libelf/libelf-dominfo.c | 3 +++
 xen/include/xen/libelf.h           | 2 ++
 3 files changed, 7 insertions(+), 2 deletions(-)

Patch

diff --git a/xen/arch/x86/hvm/dom0_build.c b/xen/arch/x86/hvm/dom0_build.c
index 878dc1d808..5b9192ecc6 100644
--- a/xen/arch/x86/hvm/dom0_build.c
+++ b/xen/arch/x86/hvm/dom0_build.c
@@ -574,8 +574,8 @@  static int __init pvh_load_kernel(struct domain *d, const module_t *image,
     }
 
     /* Copy the OS image and free temporary buffer. */
-    elf.dest_base = (void *)(parms.virt_kstart - parms.virt_base);
-    elf.dest_size = parms.virt_kend - parms.virt_kstart;
+    elf.dest_base = (void *)parms.phys_kstart - parms.elf_paddr_offset;
+    elf.dest_size = parms.phys_kend - parms.phys_kstart;
 
     elf_set_vcpu(&elf, v);
     rc = elf_load_binary(&elf);
diff --git a/xen/common/libelf/libelf-dominfo.c b/xen/common/libelf/libelf-dominfo.c
index 69c94b6f3b..b1f36866eb 100644
--- a/xen/common/libelf/libelf-dominfo.c
+++ b/xen/common/libelf/libelf-dominfo.c
@@ -453,6 +453,8 @@  static elf_errorstatus elf_xen_addr_calc_check(struct elf_binary *elf,
     }
 
     virt_offset = parms->virt_base - parms->elf_paddr_offset;
+    parms->phys_kstart = elf->pstart;
+    parms->phys_kend   = elf->pend;
     parms->virt_kstart = elf->pstart + virt_offset;
     parms->virt_kend   = elf->pend   + virt_offset;
 
@@ -464,6 +466,7 @@  static elf_errorstatus elf_xen_addr_calc_check(struct elf_binary *elf,
         elf_parse_bsdsyms(elf, elf->pend);
         if ( elf->bsd_symtab_pend )
             parms->virt_kend = elf->bsd_symtab_pend + virt_offset;
+            parms->phys_kend = elf->bsd_symtab_pend;
     }
 
     elf_msg(elf, "ELF: addresses:\n");
diff --git a/xen/include/xen/libelf.h b/xen/include/xen/libelf.h
index b73998150f..8d80d0812a 100644
--- a/xen/include/xen/libelf.h
+++ b/xen/include/xen/libelf.h
@@ -434,6 +434,8 @@  struct elf_dom_parms {
     /* calculated */
     uint64_t virt_kstart;
     uint64_t virt_kend;
+    uint64_t phys_kstart;
+    uint64_t phys_kend;
 };
 
 static inline void elf_xen_feature_set(int nr, uint32_t * addr)