gdb/

	Fix attaching to re-prelinked executables on ppc64.
	* solib-svr4.c (svr4_exec_displacement): New variable plt2_asect,
	initialize it, try to adjust FILESZ field by it.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 7341c92..5f3b259 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,9 @@
+2010-10-11  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+       Fix attaching to re-prelinked executables on ppc64.
+       * solib-svr4.c (svr4_exec_displacement): New variable plt2_asect,
+       initialize it, try to adjust FILESZ field by it.
+
 2010-10-08  Daniel Jacobowitz  <dan@codesourcery.com>
 
        * tracepoint.c (merge_uploaded_trace_state_variables): Only print

diff --git a/gdb/solib-svr4.c b/gdb/solib-svr4.c
index 9ad67fb..db21360 100644 (file)
--- a/gdb/solib-svr4.c
+++ b/gdb/solib-svr4.c
@@ -1844,6 +1844,7 @@ svr4_exec_displacement (CORE_ADDR *displacementp)
                  Elf32_External_Phdr *phdr2p;
                  gdb_byte *buf_vaddr_p, *buf_paddr_p;
                  CORE_ADDR vaddr, paddr;
+                 asection *plt2_asect;
 
                  phdrp = &((Elf32_External_Phdr *) buf)[i];
                  buf_vaddr_p = (gdb_byte *) &phdrp->p_vaddr;
@@ -1869,6 +1870,34 @@ svr4_exec_displacement (CORE_ADDR *displacementp)
                  if (memcmp (phdrp, phdr2p, sizeof (*phdrp)) == 0)
                    continue;
 
+                 /* prelink can convert .plt SHT_NOBITS to SHT_PROGBITS.  */
+                 plt2_asect = bfd_get_section_by_name (exec_bfd, ".plt");
+                 if (plt2_asect)
+                   {
+                     int content2;
+                     gdb_byte *buf_filesz_p = (gdb_byte *) &phdrp->p_filesz;
+                     CORE_ADDR filesz;
+
+                     content2 = (bfd_get_section_flags (exec_bfd, plt2_asect)
+                                 & SEC_HAS_CONTENTS) != 0;
+
+                     filesz = extract_unsigned_integer (buf_filesz_p, 4,
+                                                        byte_order);
+
+                     /* PLT2_ASECT is from on-disk file (exec_bfd) while
+                        FILESZ is from the in-memory image.  */
+                     if (content2)
+                       filesz += bfd_get_section_size (plt2_asect);
+                     else
+                       filesz -= bfd_get_section_size (plt2_asect);
+
+                     store_unsigned_integer (buf_filesz_p, 4, byte_order,
+                                             filesz);
+
+                     if (memcmp (phdrp, phdr2p, sizeof (*phdrp)) == 0)
+                       continue;
+                   }
+
                  ok = 0;
                  break;
                }
@@ -1921,6 +1950,7 @@ svr4_exec_displacement (CORE_ADDR *displacementp)
                  Elf64_External_Phdr *phdr2p;
                  gdb_byte *buf_vaddr_p, *buf_paddr_p;
                  CORE_ADDR vaddr, paddr;
+                 asection *plt2_asect;
 
                  phdrp = &((Elf64_External_Phdr *) buf)[i];
                  buf_vaddr_p = (gdb_byte *) &phdrp->p_vaddr;
@@ -1946,6 +1976,34 @@ svr4_exec_displacement (CORE_ADDR *displacementp)
                  if (memcmp (phdrp, phdr2p, sizeof (*phdrp)) == 0)
                    continue;
 
+                 /* prelink can convert .plt SHT_NOBITS to SHT_PROGBITS.  */
+                 plt2_asect = bfd_get_section_by_name (exec_bfd, ".plt");
+                 if (plt2_asect)
+                   {
+                     int content2;
+                     gdb_byte *buf_filesz_p = (gdb_byte *) &phdrp->p_filesz;
+                     CORE_ADDR filesz;
+
+                     content2 = (bfd_get_section_flags (exec_bfd, plt2_asect)
+                                 & SEC_HAS_CONTENTS) != 0;
+
+                     filesz = extract_unsigned_integer (buf_filesz_p, 8,
+                                                        byte_order);
+
+                     /* PLT2_ASECT is from on-disk file (exec_bfd) while
+                        FILESZ is from the in-memory image.  */
+                     if (content2)
+                       filesz += bfd_get_section_size (plt2_asect);
+                     else
+                       filesz -= bfd_get_section_size (plt2_asect);
+
+                     store_unsigned_integer (buf_filesz_p, 8, byte_order,
+                                             filesz);
+
+                     if (memcmp (phdrp, phdr2p, sizeof (*phdrp)) == 0)
+                       continue;
+                   }
+
                  ok = 0;
                  break;
                }