+2016-01-20 Mickael Guene <mickael.guene@st.com>
+
+ * elf32-arm.c (elf32_arm_special_sections): Remove catch of noread
+ section using '.text.noread' pattern.
+
2016-01-19 John Baldwin <jhb@FreeBSD.org>
* elf.c (elfcore_grok_note): Recognize NT_FREEBSD_THRMISC notes.
return n;
}
-static const struct bfd_elf_special_section
-elf32_arm_special_sections[] =
-{
-/* Catch sections with .text.noread prefix and apply allocate, execute and
- noread section attributes. */
- { STRING_COMMA_LEN (".text.noread"), -2, SHT_PROGBITS,
- SHF_ALLOC + SHF_EXECINSTR + SHF_ARM_NOREAD },
- { NULL, 0, 0, 0, 0 }
-};
-
static bfd_boolean
elf32_arm_section_flags (flagword *flags, const Elf_Internal_Shdr * hdr)
{
#define elf_backend_obj_attrs_order elf32_arm_obj_attrs_order
#define elf_backend_obj_attrs_handle_unknown elf32_arm_obj_attrs_handle_unknown
-#undef elf_backend_special_sections
-#define elf_backend_special_sections elf32_arm_special_sections
#undef elf_backend_section_flags
#define elf_backend_section_flags elf32_arm_section_flags
#undef elf_backend_lookup_section_flags_hook
+2016-01-20 Mickael Guene <mickael.guene@st.com>
+
+ * readelf.c (get_elf_section_flags): Display y letter for section
+ with SHF_ARM_NOREAD section flag in readelf section output.
+ (process_section_headers): Add y letter in readelf section output
+ key mapping for ARM architecture.
+ * objdump.c (dump_section_header): Display NOREAD attributes as
+ well.
+ * doc/binutils.texi (objdump): Note that it is correct for
+ sections to have both the READONLY and NOREAD attributes.
+
2016-01-19 John Baldwin <jhb@FreeBSD.org>
* readelf.c (get_freebsd_elfcore_note_type): Remove unused variable.
Instead, it shows the usual addresses, which are implicit for the
target.
+Note, in some cases it is possible for a section to have both the
+READONLY and the NOREAD attributes set. In such cases the NOREAD
+attribute takes precedence, but @command{objdump} will report both
+since the exact setting of the flag bits might be important.
+
@item -H
@itemx --help
Print a summary of the options to @command{objdump} and exit.
}
PF (SEC_SMALL_DATA, "SMALL_DATA");
if (bfd_get_flavour (abfd) == bfd_target_coff_flavour)
- PF (SEC_COFF_SHARED, "SHARED");
+ {
+ PF (SEC_COFF_SHARED, "SHARED");
+ PF (SEC_COFF_NOREAD, "NOREAD");
+ }
+ else if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
+ {
+ /* Note - sections can have both the READONLY and NOREAD attributes
+ set. In this case the NOREAD takes precedence, but we report both
+ since the user may need to know that both bits are set. */
+ PF (SEC_ELF_NOREAD, "NOREAD");
+ }
PF (SEC_THREAD_LOCAL, "THREAD_LOCAL");
PF (SEC_GROUP, "GROUP");
+ if (bfd_get_arch (abfd) == bfd_arch_mep)
+ {
+ PF (SEC_MEP_VLIW, "VLIW");
+ }
if ((section->flags & SEC_LINK_ONCE) != 0)
{
|| elf_header.e_machine == EM_K1OM)
&& flag == SHF_X86_64_LARGE)
*p = 'l';
+ else if (elf_header.e_machine == EM_ARM
+ && flag == SHF_ARM_NOREAD)
+ *p = 'y';
else if (flag & SHF_MASKOS)
{
*p = 'o';
printf (_("Key to Flags:\n\
W (write), A (alloc), X (execute), M (merge), S (strings), l (large)\n\
I (info), L (link order), G (group), T (TLS), E (exclude), x (unknown)\n\
+ O (extra OS processing required) o (OS specific), p (processor specific)\n"));
+ else if (elf_header.e_machine == EM_ARM)
+ printf (_("Key to Flags:\n\
+ W (write), A (alloc), X (execute), M (merge), S (strings), y (noread)\n\
+ I (info), L (link order), G (group), T (TLS), E (exclude), x (unknown)\n\
O (extra OS processing required) o (OS specific), p (processor specific)\n"));
else
printf (_("Key to Flags:\n\
+2016-01-20 Mickael Guene <mickael.guene@st.com>
+ Terry Guo <terry.guo@arm.com>
+
+ * config/obj-elf.c (obj_elf_change_section) : Allow arm section with
+ SHF_ARM_NOREAD section flag.
+ * config/tc-arm.h (md_elf_section_letter) : Implement this hook to
+ handle letter 'y'.
+ (arm_elf_section_letter) : Declare it.
+ * config/tc-arm.c (arm_elf_section_letter): Handle letter 'y' to set
+ SHF_ARM_NOREAD section flag.
+ * doc/c-arm.texi (ARM section attribute): Document the 'y' attribute.
+
+ * testsuite/gas/arm/section-execute-only.s: New test case.
+ * testsuite/gas/arm/section-execute-only.d: Expected output.
+
2016-01-18 Maciej W. Rozycki <macro@imgtec.com>
* config/tc-mips.c (micromips_insn_length): Remove the mention
#include "elf/nios2.h"
#endif
+#ifdef TC_ARM
+#include "elf/arm.h"
+#endif
+
static void obj_elf_line (int);
static void obj_elf_size (int);
static void obj_elf_type (int);
|| ssect->type == SHT_PREINIT_ARRAY))
/* RX init/fini arrays can and should have the "awx" attributes set. */
;
+#endif
+#ifdef TC_ARM
+ else if (attr == (SHF_EXECINSTR | SHF_ARM_NOREAD | SHF_ALLOC))
+ /* ARM can have code section with SHF_ARM_NOREAD attribute. */
+ ;
#endif
else
{
#endif /* defined (OBJ_ELF) || defined (OBJ_COFF) */
#ifdef OBJ_ELF
+bfd_vma
+arm_elf_section_letter (int letter, char **ptrmsg)
+{
+ if (letter == 'y')
+ return SHF_ARM_NOREAD;
+
+ *ptrmsg = _("unrecognized .section attribute: want a,e,w,x,y,M,S,G,T");
+ return -1;
+}
const char *
elf32_arm_target_format (void)
#define tc_frob_fake_label(S) arm_frob_label (S)
#ifdef OBJ_ELF
+#define md_elf_section_letter arm_elf_section_letter
+extern bfd_vma arm_elf_section_letter (int, char **);
+
#define md_end arm_md_end
extern void arm_md_end (void);
bfd_boolean arm_is_eabi (void);
* ARM Opcodes:: Opcodes
* ARM Mapping Symbols:: Mapping Symbols
* ARM Unwinding Tutorial:: Unwinding
+* ARM Section Attribute:: Section Attribute
@end menu
@node ARM Options
know more about the object-file format used to represent unwind
information, you may consult the @cite{Exception Handling ABI for the
ARM Architecture} available from @uref{http://infocenter.arm.com}.
+
+@node ARM Section Attribute
+@section Section Attribute
+
+@cindex ARM section attribute
+@table @code
+@item y
+This letter specifies a text section with NOREAD attribute for
+hardware that supports execute-only memory region. If not supported
+by hardware a section with this attribute will be treated as normal
+text section.
+@end table
--- /dev/null
+# name: test executable-only section attribute
+# as:
+# readelf: -t
+# This test is only valid on EABI based ports.
+# target: *-*-*eabi* *-*-nacl*
+There are 10 section headers, starting at offset 0x16c:
+
+Section Headers:
+ \[Nr\] Name
+ Type Addr Off Size ES Lk Inf Al
+ Flags
+ \[ 0\]
+ NULL 00000000 000000 000000 00 0 0 0
+ \[00000000\]:
+ \[ 1\] .text
+ PROGBITS 00000000 000034 000000 00 0 0 2
+ \[00000006\]: ALLOC, EXEC
+ \[ 2\] .data
+ PROGBITS 00000000 000034 000000 00 0 0 1
+ \[00000003\]: WRITE, ALLOC
+ \[ 3\] .bss
+ NOBITS 00000000 000034 000000 00 0 0 1
+ \[00000003\]: WRITE, ALLOC
+ \[ 4\] .text.foo
+ PROGBITS 00000000 000034 000010 00 0 0 4
+ \[20000006\]: ALLOC, EXEC, ARM_NOREAD
+#pass
--- /dev/null
+ .syntax unified
+ .cpu cortex-m3
+ .fpu softvfp
+ .eabi_attribute 20, 1
+ .eabi_attribute 21, 1
+ .eabi_attribute 23, 3
+ .eabi_attribute 24, 1
+ .eabi_attribute 25, 1
+ .eabi_attribute 26, 1
+ .eabi_attribute 30, 2
+ .eabi_attribute 34, 1
+ .eabi_attribute 18, 4
+ .thumb
+ .section .text.foo,"axy",%progbits
+ .align 2
+ .global foo
+ .thumb
+ .thumb_func
+ .type foo, %function
+foo:
+ @ args = 0, pretend = 0, frame = 0
+ @ frame_needed = 0, uses_anonymous_args = 0
+ @ link register save eliminated.
+ movs r0, #1
+ movs r1, #1
+ movw r2, #257
+ movs r3, #1
+ b madd
+ .size foo, .-foo
+
+2016-01-20 Mickael Guene <mickael.guene@st.com>
+
+ * testsuite/ld-arm/thumb1-noread-not-present-mixing-two-section.s:
+ Add 'y' attribute usage.
+ * testsuite/ld-arm/thumb1-noread-present-one-section.s: Likewise.
+ * testsuite/ld-arm/thumb1-noread-present-two-section.s: Likewise.
+ * testsuite/ld-arm/thumb1-input-section-flag-match.s: Likewise.
+
2016-01-19 Nick Clifton <nickc@redhat.com>
* testsuite/ld-elf/pr18735.d: Allow for extra symbols between
.text
- .section .text.noread
+ .section .text.fetchonly,"axy",%progbits
.arch armv6s-m
.syntax unified
.global _start
.text
- .section .text.noread
+ .section .text.noread,"axy",%progbits
.arch armv6s-m
.syntax unified
.global _start
.text
- .section .text.noread
+ .section .text.fetchonly,"axy",%progbits
.arch armv6s-m
.syntax unified
.global _start
.text
- .section .text.noread.first
+ .section .text.fetchonly.first,"axy",%progbits
.arch armv6s-m
.syntax unified
.global _start
bx lr
.text
- .section .text.noread.second
+ .section .text.fetchonly.second,"axy",%progbits
.arch armv6s-m
.syntax unified
.global foo
projects / binutils-gdb.git / commitdiff