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authorMaciej W. Rozycki <macro@imgtec.com>2017-10-23 15:39:46 +0100
committerMaciej W. Rozycki <macro@imgtec.com>2017-10-23 15:39:46 +0100
commitdefc8e2b3576c28fd5651763348ae23c18a94170 (patch)
treecba196c96f3af1293b8d9140c53f48187bcdc0c0
parentee6872beb1912af41a506c8aea34af7d2f873d04 (diff)
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MIPS: Preset EF_MIPS_ABI2 with n32 ELF objects
Fix a bug in MIPS n32 ELF object file generation and make such objects consistent with the n32 BFD requested, by presetting the EF_MIPS_ABI2 flag in the `e_flags' member of the newly created ELF file header, as it is this flag that tells n32 objects apart from o32 objects. This flag will then stay set through to output file generation for writers such as GAS or GDB's `generate-core-file' command. Readers will overwrite the whole of `e_flags' along with the rest of the ELF file header in `elf_swap_ehdr_in' and then verify in `mips_elf_n32_object_p' that the flag is still set before accepting an input file as an n32 object. The issue was discovered with GDB's `generate-core-file' command making o32 core files out of n32 debuggees. bfd/ * elfn32-mips.c (mips_elf_n32_mkobject): New prototype and function. (bfd_elf32_mkobject): Use `mips_elf_n32_mkobject' rather than `_bfd_mips_elf_mkobject'. gas/ * config/tc-mips.c (mips_elf_final_processing): Don't set EF_MIPS_ABI2 in `e_flags'.
-rw-r--r--bfd/ChangeLog7
-rw-r--r--bfd/elfn32-mips.c19
-rw-r--r--gas/ChangeLog5
-rw-r--r--gas/config/tc-mips.c4
4 files changed, 31 insertions, 4 deletions
diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index f628a61..fde334d 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,10 @@
+2017-10-23 Maciej W. Rozycki <macro@imgtec.com>
+
+ * elfn32-mips.c (mips_elf_n32_mkobject): New prototype and
+ function.
+ (bfd_elf32_mkobject): Use `mips_elf_n32_mkobject' rather than
+ `_bfd_mips_elf_mkobject'.
+
2017-10-22 Hans-Peter Nilsson <hp@axis.com>
PR gas/22304
diff --git a/bfd/elfn32-mips.c b/bfd/elfn32-mips.c
index fdae183..9ac2da3 100644
--- a/bfd/elfn32-mips.c
+++ b/bfd/elfn32-mips.c
@@ -84,6 +84,8 @@ static bfd_boolean elf_n32_mips_grok_freebsd_prstatus
(bfd *, Elf_Internal_Note *);
static irix_compat_t elf_n32_mips_irix_compat
(bfd *);
+static bfd_boolean mips_elf_n32_mkobject
+ (bfd *);
extern const bfd_target mips_elf32_n_be_vec;
extern const bfd_target mips_elf32_n_le_vec;
@@ -3643,6 +3645,21 @@ elf_n32_mips_irix_compat (bfd *abfd)
return ict_none;
}
+/* Make an n32 MIPS object. We need to set the n32 ABI flag in
+ `e_flags' to tell the object apart from an o32 object. */
+
+static bfd_boolean
+mips_elf_n32_mkobject (bfd *abfd)
+{
+ bfd_boolean ret;
+
+ ret = _bfd_mips_elf_mkobject (abfd);
+ if (ret)
+ elf_elfheader (abfd)->e_flags |= EF_MIPS_ABI2;
+
+ return ret;
+}
+
/* ECOFF swapping routines. These are used when dealing with the
.mdebug section, which is in the ECOFF debugging format. */
static const struct ecoff_debug_swap mips_elf32_ecoff_debug_swap = {
@@ -3775,7 +3792,7 @@ static const struct ecoff_debug_swap mips_elf32_ecoff_debug_swap = {
#define bfd_elf32_bfd_set_private_flags _bfd_mips_elf_set_private_flags
#define bfd_elf32_bfd_print_private_bfd_data \
_bfd_mips_elf_print_private_bfd_data
-#define bfd_elf32_mkobject _bfd_mips_elf_mkobject
+#define bfd_elf32_mkobject mips_elf_n32_mkobject
/* Support for SGI-ish mips targets using n32 ABI. */
diff --git a/gas/ChangeLog b/gas/ChangeLog
index af915ff..44debdc 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,8 @@
+2017-10-23 Maciej W. Rozycki <macro@imgtec.com>
+
+ * config/tc-mips.c (mips_elf_final_processing): Don't set
+ EF_MIPS_ABI2 in `e_flags'.
+
2017-10-22 Hans-Peter Nilsson <hp@axis.com>
PR gas/22304
diff --git a/gas/config/tc-mips.c b/gas/config/tc-mips.c
index e4351f7..040a373 100644
--- a/gas/config/tc-mips.c
+++ b/gas/config/tc-mips.c
@@ -19140,10 +19140,8 @@ mips_elf_final_processing (void)
else
elf_elfheader (stdoutput)->e_flags |= E_MIPS_ABI_EABI32;
}
- else if (mips_abi == N32_ABI)
- elf_elfheader (stdoutput)->e_flags |= EF_MIPS_ABI2;
- /* Nothing to do for N64_ABI. */
+ /* Nothing to do for N32_ABI or N64_ABI. */
if (mips_32bitmode)
elf_elfheader (stdoutput)->e_flags |= EF_MIPS_32BITMODE;