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kumquat-buildroot/toolchain/elf2flt/elf2flt.nios2.conditional

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initial attempt at adding elf2flt support based upon marcs work in Bug 273
2006-01-10 06:56:59 +01:00
--- elf2flt/Makefile.in
+++ elf2flt/Makefile.in
@@ -34,6 +34,12 @@ else
SRC_LDFILE= elf2flt.ld
endif
+ifeq ($(strip $(CPU)),nios2)
+SRC_LDFILE= $(CPU)-elf2flt.ld
+else
+SRC_LDFILE= elf2flt.ld
+endif
+
target_bindir = $(prefix)/$(TARGET)/bin
target_libdir = $(prefix)/$(TARGET)/lib
--- elf2flt/elf2flt.c
+++ elf2flt/elf2flt.c
@@ -553,9 +553,11 @@ dump_symbols(symbols, number_of_symbols)
* Only relocate things in the data sections if we are PIC/GOT.
* otherwise do text as well
*/
- if (!pic_with_got && (a->flags & SEC_CODE))
+// wentao if (!pic_with_got && (a->flags & SEC_CODE))
+ if (!pic_with_got && (strcmp(".text", a->name) == 0))
sectionp = text + (a->vma - text_vma);
- else if (a->flags & SEC_DATA)
+// wentao else if (a->flags & SEC_DATA)
+ else if (strcmp(".data", a->name) == 0)
sectionp = data + (a->vma - data_vma);
else
continue;
@@ -926,8 +928,7 @@ dump_symbols(symbols, number_of_symbols)
bad_relocs++;
continue;
}
- /* Absolute symbol done not relocation */
- relocation_needed = !bfd_is_abs_section(sym_section);
+ relocation_needed = 1;
sym_addr = (*(q->sym_ptr_ptr))->value;
sym_vma = bfd_section_vma(abs_bfd, sym_section);
sym_addr += sym_vma + q->addend;
@@ -1013,19 +1014,10 @@ dump_symbols(symbols, number_of_symbols)
/* grab any offset from the text */
offset = (p[0]<<24) + (p[1] << 16) + (p[2] << 8) + (p[3]);
+ //sym_addr = (*(q->sym_ptr_ptr))->value;
sym_vma = bfd_section_vma(abs_bfd, sym_section);
- /* This is a horrible kludge. For some
- reason, *sometimes* the offset is in
- both addend and the code. Detect
- it, and cancel the effect. Otherwise
- the offset gets added twice - ouch.
- There should be a better test
- for this condition, based on the
- BFD data structures */
- if(offset==q->addend)
- offset=0;
-
sym_addr += offset + sym_vma + q->addend;
+
relocation_needed = 1;
break;
}
@@ -1848,32 +1840,27 @@ int main(int argc, char *argv[])
/* Group output sections into text, data, and bss, and calc their sizes. */
for (s = abs_bfd->sections; s != NULL; s = s->next) {
unsigned long *vma, *len;
- bfd_size_type sec_size;
- bfd_vma sec_vma;
- if (s->flags & SEC_CODE) {
+ if (strcmp(s->name, ".text") == 0) /*wentao if (s->flags & SEC_CODE)*/ {
vma = &text_vma;
len = &text_len;
- } else if (s->flags & SEC_DATA) {
+ } else if (strcmp(s->name, ".data") == 0) /* wentao (s->flags & SEC_DATA)*/ {
vma = &data_vma;
len = &data_len;
- } else if (s->flags & SEC_ALLOC) {
+ } else if (strcmp(s->name, ".bss") == 0) /*(s->flags & SEC_ALLOC)*/ {
vma = &bss_vma;
len = &bss_len;
} else
continue;
- sec_size = bfd_section_size(abs_bfd, s);
- sec_vma = bfd_section_vma(abs_bfd, s);
-
- if (sec_vma < *vma) {
+ if (s->vma < *vma) {
if (*len > 0)
- *len += sec_vma - *vma;
+ *len += s->vma - *vma;
else
- *len = sec_size;
- *vma = sec_vma;
- } else if (sec_vma + sec_size > *vma + *len)
- *len = sec_vma + sec_size - *vma;
+ *len = s->_raw_size;
+ *vma = s->vma;
+ } else if (s->vma + s->_raw_size > *vma + *len)
+ *len = s->vma + s->_raw_size - *vma;
}
if (text_len == 0) {
@@ -1888,10 +1875,10 @@ int main(int argc, char *argv[])
/* Read in all text sections. */
for (s = abs_bfd->sections; s != NULL; s = s->next)
- if (s->flags & SEC_CODE)
+ if (strcmp(s->name, ".text") == 0) /* wentao (s->flags & SEC_CODE) */
if (!bfd_get_section_contents(abs_bfd, s,
text + (s->vma - text_vma), 0,
- bfd_section_size(abs_bfd, s)))
+ s->_raw_size))
{
fprintf(stderr, "read error section %s\n", s->name);
exit(2);
@@ -1919,10 +1906,10 @@ int main(int argc, char *argv[])
/* Read in all data sections. */
for (s = abs_bfd->sections; s != NULL; s = s->next)
- if (s->flags & SEC_DATA)
+ if (strcmp(s->name, ".data") == 0) /* wentao (s->flags & SEC_DATA)*/
if (!bfd_get_section_contents(abs_bfd, s,
data + (s->vma - data_vma), 0,
- bfd_section_size(abs_bfd, s)))
+ s->_raw_size))
{
fprintf(stderr, "read error section %s\n", s->name);
exit(2);
--- elf2flt/nios2-elf2flt.ld
+++ elf2flt/nios2-elf2flt.ld
@@ -0,0 +1,126 @@
+ENTRY (_start)
+
+MEMORY {
+ flatmem : ORIGIN = 0x0, LENGTH = 0xfffffff
+}
+
+SECTIONS {
+ .text 0 : {
+ /* Avoid address 0; binfmt_flat treats it specially. */
+ . = . + 4 ;
+
+ . = ALIGN(0x4) ;
+ _stext = . ;
+
+ *(.text)
+ *(.text.*)
+ *(.gnu.warning)
+ *(.stub)
+ *(.gnu.linkonce.t*)
+ *(.jcr)
+ *(.init)
+ *(.fini)
+
+ /* This is special code area at the end of the normal
+ text section. It contains a small lookup table at
+ the start followed by the code pointed to by entries
+ in the lookup table. */
+ . = ALIGN (4) ;
+ PROVIDE(__ctbp = .);
+ *(.call_table_data)
+ *(.call_table_text)
+
+ . = ALIGN(0x10) ;
+ _etext = . ;
+ } > flatmem
+ .data : {
+ . = ALIGN(0x4) ;
+ _sdata = . ;
+ __data_start = . ;
+ data_start = . ;
+ *(.rela.got)
+ *(.rel.got)
+ *(.got.plt)
+ *(.got)
+ LONG(-1)
+ *(.rodata)
+ *(.rodata1)
+ *(.rodata.*)
+ *(.gnu.linkonce.r*)
+ *(.data)
+ *(.data.*)
+ *(.gnu.linkonce.d*)
+ *(.data1)
+ *(.eh_frame)
+ *(.gcc_except_table)
+ . = ALIGN(4) ;
+ *(.ctors.*)
+ *(.ctors)
+ LONG(0)
+ *(.dtors.*)
+ *(.dtors)
+ LONG(0)
+ . = ALIGN(0x10) ;
+
+ _gp = ABSOLUTE(ALIGN(16) + 0x7ff0);
+ PROVIDE(gp = _gp);
+ *(.sdata)
+ *(.sdata.*)
+ *(.sbss)
+ *(.gnu.linkonce.s.*)
+ _edata = . ;
+ } > flatmem
+ .bss : {
+ . = ALIGN(0x4) ;
+ _sbss = ALIGN(0x4) ;
+ __bss_start = . ;
+ *(.dynsbss)
+ *(.sbss)
+ *(.sbss.*)
+ *(.scommon)
+ *(.dynbss)
+ *(.bss)
+ *(.bss.*)
+ *(COMMON)
+ . = ALIGN(0x4) ;
+ _ebss = . ;
+ _end = . ;
+ end = . ;
+ } > flatmem
+
+ .junk 0 : { *(.rel*) *(.rela*) }
+ /* Stabs debugging sections. */
+ .stab 0 : { *(.stab) }
+ .stabstr 0 : { *(.stabstr) }
+ .stab.excl 0 : { *(.stab.excl) }
+ .stab.exclstr 0 : { *(.stab.exclstr) }
+ .stab.index 0 : { *(.stab.index) }
+ .stab.indexstr 0 : { *(.stab.indexstr) }
+ .comment 0 : { *(.comment) }
+ /* DWARF debug sections.
+ Symbols in the DWARF debugging sections are relative to the beginning
+ of the section so we begin them at 0. */
+ /* DWARF 1 */
+ .debug 0 : { *(.debug) }
+ .line 0 : { *(.line) }
+ /* GNU DWARF 1 extensions */
+ .debug_srcinfo 0 : { *(.debug_srcinfo) }
+ .debug_sfnames 0 : { *(.debug_sfnames) }
+ /* DWARF 1.1 and DWARF 2 */
+ .debug_aranges 0 : { *(.debug_aranges) }
+ .debug_pubnames 0 : { *(.debug_pubnames) }
+ /* DWARF 2 */
+ .debug_info 0 : { *(.debug_info) }
+ .debug_abbrev 0 : { *(.debug_abbrev) }
+ .debug_line 0 : { *(.debug_line) }
+ .debug_frame 0 : { *(.debug_frame) }
+ .debug_str 0 : { *(.debug_str) }
+ .debug_loc 0 : { *(.debug_loc) }
+ .debug_macinfo 0 : { *(.debug_macinfo) }
+ /* SGI/MIPS DWARF 2 extensions */
+ .debug_weaknames 0 : { *(.debug_weaknames) }
+ .debug_funcnames 0 : { *(.debug_funcnames) }
+ .debug_typenames 0 : { *(.debug_typenames) }
+ .debug_varnames 0 : { *(.debug_varnames) }
+ /* These must appear regardless of . */
+}
--- elf2flt/ld-elf2flt.in
+++ elf2flt/ld-elf2flt.in
@@ -15,13 +15,9 @@
LINKER="$0.real" # the original renamed-linker
ELF2FLT="`expr $0 : '\(.*\)ld'`elf2flt"
TOOLDIR="`dirname $0`" # let gcc find the tools for us
-LDSCRIPTPATH="${TOOLDIR}/../@target_alias@/lib" # and the scripts
SHARED_ID=""
NEWLDSCRIPT=""
-# check TOOLDIR from prefix/bin/ or prefix/target-alias/bin/
-[ -d "${TOOLDIR}/../@target_alias@/lib" ] || LDSCRIPTPATH="${TOOLDIR}/../lib"
-
#
# if we have the elf2flt options, run it
#
@@ -77,9 +73,6 @@ then
VERBOSE="y"
;;
- -m) shift; EMUL="-m $1";; # ld emulations for h8300
- -m*) EMUL=$1;;
-
*) ARG1="$ARG1 $1"
;;
esac
@@ -120,37 +113,33 @@ then
fi
# Provide the magic parameter that defines the library data segment pointer offset
- case "@target_cpu@" in
- h8300) GOT_OFFSET="__current_shared_library_er5_offset_";;
- *) GOT_OFFSET="_current_shared_library_a5_offset_";;
- esac
- ARG1="$ARG1 -defsym $GOT_OFFSET=`expr ${SHARED_ID} '*' -4 - 4`"
+ ARG1="$ARG1 -defsym _current_shared_library_a5_offset_=`expr ${SHARED_ID} '*' -4 - 4`"
fi
# provide a default linker script, we usually need one
- [ -z "$LDSCRIPT" ] && LDSCRIPT="${LDSCRIPTPATH}/elf2flt.ld"
+ [ -z "$LDSCRIPT" ] && LDSCRIPT="@prefix@/@target_alias@/lib/elf2flt.ld"
# if we can find the linker script we preprocess it, otherwise
# we assume the user knows what they are doing
if [ -f "$LDSCRIPT" ]; then
sed $SEDOP < "$LDSCRIPT" > "$NEWLDSCRIPT"
LDSCRIPT="$NEWLDSCRIPT"
- elif [ -f "${LDSCRIPTPATH}/$LDSCRIPT" ]; then
- sed $SEDOP < "${LDSCRIPTPATH}/$LDSCRIPT" > "$NEWLDSCRIPT"
+ elif [ -f "@prefix@/@target_alias@/lib/$LDSCRIPT" ]; then
+ sed $SEDOP < "@prefix@/@target_alias@/lib/$LDSCRIPT" > "$NEWLDSCRIPT"
LDSCRIPT="$NEWLDSCRIPT"
- elif [ -f "${LDSCRIPTPATH}/ldscripts/$LDSCRIPT" ]; then
- sed $SEDOP < "${LDSCRIPTPATH}/ldscripts/$LDSCRIPT" > "$NEWLDSCRIPT"
+ elif [ -f "@prefix@/@target_alias@/lib/ldscripts/$LDSCRIPT" ]; then
+ sed $SEDOP < "@prefix@/@target_alias@/lib/ldscripts/$LDSCRIPT" > "$NEWLDSCRIPT"
LDSCRIPT="$NEWLDSCRIPT"
fi
if [ "@got_check@" = "no" ]
then
- $LINKER $EMUL $SDIRS -T $LDSCRIPT -Ur -d -o "$OFILE.elf" $ARG1 ||exit $?
- $LINKER $EMUL $SDIRS -T $LDSCRIPT -o "$OFILE.gdb" $ARG1 ||exit $?
+ $LINKER $SDIRS -T $LDSCRIPT -Ur -d -o "$OFILE.elf" $ARG1 ||exit $?
+ $LINKER $SDIRS -T $LDSCRIPT -o "$OFILE.gdb" $ARG1 ||exit $?
else
- $LINKER $EMUL -r -d -o "$OFILE.elf2flt" $ARG1 ||exit $?
- $LINKER $EMUL $SDIRS -T $LDSCRIPT -Ur -o "$OFILE.elf" "$OFILE.elf2flt" ||exit $?
- $LINKER $EMUL $SDIRS -T $LDSCRIPT -o "$OFILE.gdb" "$OFILE.elf2flt" ||exit $?
+ $LINKER -r -d -o "$OFILE.elf2flt" $ARG1 ||exit $?
+ $LINKER $SDIRS -T $LDSCRIPT -Ur -o "$OFILE.elf" "$OFILE.elf2flt" ||exit $?
+ $LINKER $SDIRS -T $LDSCRIPT -o "$OFILE.gdb" "$OFILE.elf2flt" ||exit $?
rm -f "$OFILE.elf2flt"
fi
if grep _GLOBAL_OFFSET_TABLE_ "$OFILE.gdb" > /dev/null
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