--- /dev/null
+// vim:shiftwidth=2:expandtab
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <elf.h>
+#include <sys/mman.h>
+
+#define CHECK_(val, fail_operator, expect, err_msg) \
+ if (val fail_operator expect) { \
+ fprintf(stderr, err_msg ", exiting (%d)\n", (int)(long)val); \
+ return 1; \
+ }
+
+#define CHECK_EQ(val, expect, err_msg) \
+ CHECK_(val, !=, expect, err_msg)
+
+#define CHECK_NE(val, expect, err_msg) \
+ CHECK_(val, ==, expect, err_msg)
+
+#define HDR_CHECK_EQ(field, expect, err_msg) \
+ CHECK_(hdr.field, !=, expect, err_msg)
+
+#define HDR_CHECK_NE(field, expect, err_msg) \
+ CHECK_(hdr.field, ==, expect, err_msg)
+
+#define FAIL_PERROR(msg) { \
+ perror(msg); \
+ return 1; \
+}
+
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
+
+typedef struct {
+ unsigned long start;
+ unsigned long end;
+} maps_range;
+
+static int is_range_used(maps_range *maps, int map_cnt, unsigned long start, unsigned long end)
+{
+ int i;
+ for (i = 0; i < map_cnt; i++) {
+ if (maps[i].end <= start)
+ continue;
+ if (end <= maps[i].start)
+ continue;
+
+ return i + 1;
+ }
+
+ return 0;
+}
+
+extern char **environ;
+extern void do_entry(Elf32_Addr entry, void *stack_frame, int stack_frame_size, void *exitf);
+
+int main(int argc, char *argv[])
+{
+ Elf32_Ehdr hdr;
+ Elf32_Phdr *phdr;
+ FILE *fi;
+ maps_range maps[16];
+ int map_cnt;
+ int i, ret;
+ long stack_frame[5];
+
+ if (argc != 2) {
+ fprintf(stderr, "usage: %s <program>\n", argv[0]);
+ return 1;
+ }
+
+ fi = fopen("/proc/self/maps", "r");
+ CHECK_NE(fi, NULL, "fopen maps");
+
+ for (i = 0; i < ARRAY_SIZE(maps); i++) {
+ ret = fscanf(fi, "%lx-%lx %*s %*s %*s %*s %*s\n", &maps[i].start, &maps[i].end);
+ if (ret == 0)
+ break;
+ CHECK_EQ(ret, 2, "maps parse error");
+ }
+ fclose(fi);
+ map_cnt = i;
+ CHECK_NE(map_cnt, 0, "no maps");
+ CHECK_NE(map_cnt, ARRAY_SIZE(maps), "too many maps");
+
+ fi = fopen(argv[1], "rb");
+ if (fi == NULL)
+ FAIL_PERROR("fopen");
+
+ if (fread(&hdr, 1, sizeof(hdr), fi) != sizeof(hdr))
+ FAIL_PERROR("too small or");
+
+ if (memcmp(hdr.e_ident, ELFMAG "\x01\x01", SELFMAG + 2) != 0) {
+ fprintf(stderr, "not 32bit LE ELF?\n");
+ return 1;
+ }
+
+ HDR_CHECK_EQ(e_type, ET_EXEC, "not executable");
+// HDR_CHECK_EQ(e_machine, EM_ARM, "not ARM");
+ HDR_CHECK_EQ(e_phentsize, sizeof(Elf32_Phdr), "bad PH entry size");
+ HDR_CHECK_NE(e_phnum, 0, "no PH entries");
+
+ phdr = malloc(hdr.e_phnum * hdr.e_phentsize);
+ CHECK_NE(phdr, NULL, "OOM");
+
+ if (fread(phdr, hdr.e_phentsize, hdr.e_phnum, fi) != hdr.e_phnum)
+ FAIL_PERROR("too small or");
+
+ for (i = 0; i < hdr.e_phnum; i++) {
+ Elf32_Addr end_addr = phdr[i].p_vaddr + phdr[i].p_memsz;
+ Elf32_Addr align;
+ void *ptr, *map_ptr;
+
+ if (phdr[i].p_type == PT_NOTE)
+ continue;
+ if (phdr[i].p_type != PT_LOAD) {
+ fprintf(stderr, "skipping section %d\n", phdr[i].p_type);
+ continue;
+ }
+
+ ret = is_range_used(maps, map_cnt, phdr[i].p_vaddr, end_addr);
+ if (ret) {
+ fprintf(stderr, "segment %d (%08x-%08x) hits %08lx-%08lx in maps\n",
+ i, phdr[i].p_vaddr, end_addr, maps[ret - 1].start, maps[ret - 1].end);
+ return 1;
+ }
+
+ printf("load %d %08x-%08x from %08x\n", phdr[i].p_type,
+ phdr[i].p_vaddr, end_addr, phdr[i].p_offset);
+
+ align = phdr[i].p_vaddr & 0xfff;
+ map_ptr = (void *)(phdr[i].p_vaddr - align);
+ ptr = mmap(map_ptr, phdr[i].p_memsz + align, PROT_READ|PROT_WRITE|PROT_EXEC,
+ MAP_FIXED|MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
+ if (ptr == MAP_FAILED || ptr != map_ptr)
+ FAIL_PERROR("mmap");
+
+ if (phdr[i].p_filesz > 0) {
+ if (fseek(fi, phdr[i].p_offset, SEEK_SET) != 0)
+ FAIL_PERROR("fseek");
+ if (fread((char *)ptr + align, 1, phdr[i].p_filesz, fi) != phdr[i].p_filesz)
+ FAIL_PERROR("too small or");
+ }
+ }
+
+ stack_frame[0] = 1; // argc
+ stack_frame[1] = (long)argv[1];
+ stack_frame[2] = 0;
+ stack_frame[3] = (long)environ;
+ stack_frame[4] = 0;
+
+ printf("entering %08x\n", hdr.e_entry);
+ do_entry(hdr.e_entry, stack_frame, 5, NULL);
+
+ return 0;
+}
+
--- /dev/null
+.text
+
+/* void do_entry(Elf32_Addr entry, void *stack_frame, int stack_frame_size, void *exitf); */
+
+.globl do_entry
+do_entry:
+ sub sp, sp, r2, lsl #2
+ mov r4, sp
+ mov r5, r0
+0:
+ ldr r0, [r1], #4
+ subs r2, r2, #1
+ str r0, [r4], #4
+ bgt 0b
+
+ mov r0, r3
+ bx r5
--- /dev/null
+.text
+
+/* void do_entry(Elf32_Addr entry, void *stack_frame, int stack_frame_size, void *exitf); */
+
+.globl do_entry
+do_entry:
+ movl 4(%esp), %ebx
+ movl 8(%esp), %esi
+ movl 12(%esp), %eax
+ movl 16(%esp), %edx
+
+ movl %eax, %ecx
+ shll $2, %ecx
+ subl %ecx, %esp
+
+ /* copy stack frame */
+ movl %esp, %edi
+0:
+ movl (%esi), %ecx
+ movl %ecx, (%edi)
+ addl $4, %esi
+ addl $4, %edi
+ subl $1, %eax
+ jg 0b
+
+ jmp *%ebx
--- /dev/null
+/* Script for -z combreloc: combine and sort reloc sections */
+OUTPUT_FORMAT("elf32-littlearm")
+OUTPUT_ARCH(arm)
+ENTRY(_start)
+SEARCH_DIR("=/usr/local/lib"); SEARCH_DIR("=/lib"); SEARCH_DIR("=/usr/lib");
+SECTIONS
+{
+ mybase = 0x70000000; /* 0x00008000 */
+ /* Read-only sections, merged into text segment: */
+ PROVIDE (__executable_start = mybase);
+ . = mybase + SIZEOF_HEADERS;
+ .interp : { *(.interp) }
+ .hash : { *(.hash) }
+ .dynsym : { *(.dynsym) }
+ .dynstr : { *(.dynstr) }
+ .gnu.version : { *(.gnu.version) }
+ .gnu.version_d : { *(.gnu.version_d) }
+ .gnu.version_r : { *(.gnu.version_r) }
+ .rel.dyn :
+ {
+ *(.rel.init)
+ *(.rel.text .rel.text.* .rel.gnu.linkonce.t.*)
+ *(.rel.fini)
+ *(.rel.rodata .rel.rodata.* .rel.gnu.linkonce.r.*)
+ *(.rel.data.rel.ro*)
+ *(.rel.data .rel.data.* .rel.gnu.linkonce.d.*)
+ *(.rel.tdata .rel.tdata.* .rel.gnu.linkonce.td.*)
+ *(.rel.tbss .rel.tbss.* .rel.gnu.linkonce.tb.*)
+ *(.rel.ctors)
+ *(.rel.dtors)
+ *(.rel.got)
+ *(.rel.bss .rel.bss.* .rel.gnu.linkonce.b.*)
+ }
+ .rela.dyn :
+ {
+ *(.rela.init)
+ *(.rela.text .rela.text.* .rela.gnu.linkonce.t.*)
+ *(.rela.fini)
+ *(.rela.rodata .rela.rodata.* .rela.gnu.linkonce.r.*)
+ *(.rela.data .rela.data.* .rela.gnu.linkonce.d.*)
+ *(.rela.tdata .rela.tdata.* .rela.gnu.linkonce.td.*)
+ *(.rela.tbss .rela.tbss.* .rela.gnu.linkonce.tb.*)
+ *(.rela.ctors)
+ *(.rela.dtors)
+ *(.rela.got)
+ *(.rela.bss .rela.bss.* .rela.gnu.linkonce.b.*)
+ }
+ .rel.plt : { *(.rel.plt) }
+ .rela.plt : { *(.rela.plt) }
+ .init :
+ {
+ KEEP (*(.init))
+ } =0
+ .plt : { *(.plt) }
+ .text :
+ {
+ *(.text .stub .text.* .gnu.linkonce.t.*)
+ KEEP (*(.text.*personality*))
+ /* .gnu.warning sections are handled specially by elf32.em. */
+ *(.gnu.warning)
+ *(.glue_7t) *(.glue_7)
+ } =0
+ .fini :
+ {
+ KEEP (*(.fini))
+ } =0
+ PROVIDE (__etext = .);
+ PROVIDE (_etext = .);
+ PROVIDE (etext = .);
+ .rodata : { *(.rodata .rodata.* .gnu.linkonce.r.*) }
+ .rodata1 : { *(.rodata1) }
+ .eh_frame_hdr : { *(.eh_frame_hdr) }
+ .eh_frame : ONLY_IF_RO { KEEP (*(.eh_frame)) }
+ .gcc_except_table : ONLY_IF_RO { KEEP (*(.gcc_except_table)) *(.gcc_except_table.*) }
+ /* Adjust the address for the data segment. We want to adjust up to
+ the same address within the page on the next page up. */
+ . = ALIGN (0x8000) - ((0x8000 - .) & (0x8000 - 1)); . = DATA_SEGMENT_ALIGN (0x8000, 0x1000);
+ /* Exception handling */
+ .eh_frame : ONLY_IF_RW { KEEP (*(.eh_frame)) }
+ .gcc_except_table : ONLY_IF_RW { KEEP (*(.gcc_except_table)) *(.gcc_except_table.*) }
+ /* Thread Local Storage sections */
+ .tdata : { *(.tdata .tdata.* .gnu.linkonce.td.*) }
+ .tbss : { *(.tbss .tbss.* .gnu.linkonce.tb.*) *(.tcommon) }
+ /* Ensure the __preinit_array_start label is properly aligned. We
+ could instead move the label definition inside the section, but
+ the linker would then create the section even if it turns out to
+ be empty, which isn't pretty. */
+ . = ALIGN(32 / 8);
+ PROVIDE (__preinit_array_start = .);
+ .preinit_array : { KEEP (*(.preinit_array)) }
+ PROVIDE (__preinit_array_end = .);
+ PROVIDE (__init_array_start = .);
+ .init_array : { KEEP (*(.init_array)) }
+ PROVIDE (__init_array_end = .);
+ PROVIDE (__fini_array_start = .);
+ .fini_array : { KEEP (*(.fini_array)) }
+ PROVIDE (__fini_array_end = .);
+ .ctors :
+ {
+ /* gcc uses crtbegin.o to find the start of
+ the constructors, so we make sure it is
+ first. Because this is a wildcard, it
+ doesn't matter if the user does not
+ actually link against crtbegin.o; the
+ linker won't look for a file to match a
+ wildcard. The wildcard also means that it
+ doesn't matter which directory crtbegin.o
+ is in. */
+ KEEP (*crtbegin*.o(.ctors))
+ /* We don't want to include the .ctor section from
+ from the crtend.o file until after the sorted ctors.
+ The .ctor section from the crtend file contains the
+ end of ctors marker and it must be last */
+ KEEP (*(EXCLUDE_FILE (*crtend*.o ) .ctors))
+ KEEP (*(SORT(.ctors.*)))
+ KEEP (*(.ctors))
+ }
+ .dtors :
+ {
+ KEEP (*crtbegin*.o(.dtors))
+ KEEP (*(EXCLUDE_FILE (*crtend*.o ) .dtors))
+ KEEP (*(SORT(.dtors.*)))
+ KEEP (*(.dtors))
+ }
+ .jcr : { KEEP (*(.jcr)) }
+ .data.rel.ro : { *(.data.rel.ro.local) *(.data.rel.ro*) }
+ .dynamic : { *(.dynamic) }
+ . = DATA_SEGMENT_RELRO_END (0, .);
+ .got : { *(.got.plt) *(.got) }
+ .data :
+ {
+ __data_start = . ;
+ *(.data .data.* .gnu.linkonce.d.*)
+ KEEP (*(.gnu.linkonce.d.*personality*))
+ SORT(CONSTRUCTORS)
+ }
+ .data1 : { *(.data1) }
+ _edata = .;
+ PROVIDE (edata = .);
+ __bss_start = .;
+ __bss_start__ = .;
+ .bss :
+ {
+ *(.dynbss)
+ *(.bss .bss.* .gnu.linkonce.b.*)
+ *(COMMON)
+ /* Align here to ensure that the .bss section occupies space up to
+ _end. Align after .bss to ensure correct alignment even if the
+ .bss section disappears because there are no input sections. */
+ . = ALIGN(32 / 8);
+ }
+ . = ALIGN(32 / 8);
+ _end = .;
+ _bss_end__ = . ; __bss_end__ = . ; __end__ = . ;
+ PROVIDE (end = .);
+ . = DATA_SEGMENT_END (.);
+ /* Stabs debugging sections. */
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+ .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 .gnu.linkonce.wi.*) }
+ .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) }
+ .note.gnu.arm.ident 0 : { KEEP (*(.note.gnu.arm.ident)) }
+ /DISCARD/ : { *(.note.GNU-stack) }
+}
+
+
--- /dev/null
+/* Script for -z combreloc: combine and sort reloc sections */
+OUTPUT_FORMAT("elf32-i386")
+OUTPUT_ARCH(i386)
+ENTRY(_start)
+SEARCH_DIR("/usr/local/lib32"); SEARCH_DIR("/lib32"); SEARCH_DIR("/usr/lib32");
+SECTIONS
+{
+ mybase = 0x70000000; /* 0x08048000 */
+ /* Read-only sections, merged into text segment: */
+ PROVIDE (__executable_start = SEGMENT_START("text-segment", mybase));
+ . = SEGMENT_START("text-segment", mybase) + SIZEOF_HEADERS;
+ .interp : { *(.interp) }
+ .note.gnu.build-id : { *(.note.gnu.build-id) }
+ .hash : { *(.hash) }
+ .gnu.hash : { *(.gnu.hash) }
+ .dynsym : { *(.dynsym) }
+ .dynstr : { *(.dynstr) }
+ .gnu.version : { *(.gnu.version) }
+ .gnu.version_d : { *(.gnu.version_d) }
+ .gnu.version_r : { *(.gnu.version_r) }
+ .rel.dyn :
+ {
+ *(.rel.init)
+ *(.rel.text .rel.text.* .rel.gnu.linkonce.t.*)
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+ *(.rel.rodata .rel.rodata.* .rel.gnu.linkonce.r.*)
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+ *(.rel.got)
+ *(.rel.bss .rel.bss.* .rel.gnu.linkonce.b.*)
+ *(.rel.ifunc)
+ }
+ .rel.plt :
+ {
+ *(.rel.plt)
+ PROVIDE_HIDDEN (__rel_iplt_start = .);
+ *(.rel.iplt)
+ PROVIDE_HIDDEN (__rel_iplt_end = .);
+ }
+ .init :
+ {
+ KEEP (*(.init))
+ } =0x90909090
+ .plt : { *(.plt) *(.iplt) }
+ .text :
+ {
+ *(.text.unlikely .text.*_unlikely)
+ *(.text .stub .text.* .gnu.linkonce.t.*)
+ /* .gnu.warning sections are handled specially by elf32.em. */
+ *(.gnu.warning)
+ } =0x90909090
+ .fini :
+ {
+ KEEP (*(.fini))
+ } =0x90909090
+ PROVIDE (__etext = .);
+ PROVIDE (_etext = .);
+ PROVIDE (etext = .);
+ .rodata : { *(.rodata .rodata.* .gnu.linkonce.r.*) }
+ .rodata1 : { *(.rodata1) }
+ .eh_frame_hdr : { *(.eh_frame_hdr) }
+ .eh_frame : ONLY_IF_RO { KEEP (*(.eh_frame)) }
+ .gcc_except_table : ONLY_IF_RO { *(.gcc_except_table .gcc_except_table.*) }
+ /* Adjust the address for the data segment. We want to adjust up to
+ the same address within the page on the next page up. */
+ . = ALIGN (CONSTANT (MAXPAGESIZE)) - ((CONSTANT (MAXPAGESIZE) - .) & (CONSTANT (MAXPAGESIZE) - 1)); . = DATA_SEGMENT_ALIGN (CONSTANT (MAXPAGESIZE), CONSTANT (COMMONPAGESIZE));
+ /* Exception handling */
+ .eh_frame : ONLY_IF_RW { KEEP (*(.eh_frame)) }
+ .gcc_except_table : ONLY_IF_RW { *(.gcc_except_table .gcc_except_table.*) }
+ /* Thread Local Storage sections */
+ .tdata : { *(.tdata .tdata.* .gnu.linkonce.td.*) }
+ .tbss : { *(.tbss .tbss.* .gnu.linkonce.tb.*) *(.tcommon) }
+ .preinit_array :
+ {
+ PROVIDE_HIDDEN (__preinit_array_start = .);
+ KEEP (*(.preinit_array))
+ PROVIDE_HIDDEN (__preinit_array_end = .);
+ }
+ .init_array :
+ {
+ PROVIDE_HIDDEN (__init_array_start = .);
+ KEEP (*(SORT(.init_array.*)))
+ KEEP (*(.init_array))
+ PROVIDE_HIDDEN (__init_array_end = .);
+ }
+ .fini_array :
+ {
+ PROVIDE_HIDDEN (__fini_array_start = .);
+ KEEP (*(.fini_array))
+ KEEP (*(SORT(.fini_array.*)))
+ PROVIDE_HIDDEN (__fini_array_end = .);
+ }
+ .ctors :
+ {
+ /* gcc uses crtbegin.o to find the start of
+ the constructors, so we make sure it is
+ first. Because this is a wildcard, it
+ doesn't matter if the user does not
+ actually link against crtbegin.o; the
+ linker won't look for a file to match a
+ wildcard. The wildcard also means that it
+ doesn't matter which directory crtbegin.o
+ is in. */
+ KEEP (*crtbegin.o(.ctors))
+ KEEP (*crtbegin?.o(.ctors))
+ /* We don't want to include the .ctor section from
+ the crtend.o file until after the sorted ctors.
+ The .ctor section from the crtend file contains the
+ end of ctors marker and it must be last */
+ KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .ctors))
+ KEEP (*(SORT(.ctors.*)))
+ KEEP (*(.ctors))
+ }
+ .dtors :
+ {
+ KEEP (*crtbegin.o(.dtors))
+ KEEP (*crtbegin?.o(.dtors))
+ KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .dtors))
+ KEEP (*(SORT(.dtors.*)))
+ KEEP (*(.dtors))
+ }
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+ .got : { *(.got) *(.igot) }
+ . = DATA_SEGMENT_RELRO_END (12, .);
+ .got.plt : { *(.got.plt) *(.igot.plt) }
+ .data :
+ {
+ *(.data .data.* .gnu.linkonce.d.*)
+ SORT(CONSTRUCTORS)
+ }
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+ _edata = .; PROVIDE (edata = .);
+ __bss_start = .;
+ .bss :
+ {
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+ *(.bss .bss.* .gnu.linkonce.b.*)
+ *(COMMON)
+ /* Align here to ensure that the .bss section occupies space up to
+ _end. Align after .bss to ensure correct alignment even if the
+ .bss section disappears because there are no input sections.
+ FIXME: Why do we need it? When there is no .bss section, we don't
+ pad the .data section. */
+ . = ALIGN(. != 0 ? 32 / 8 : 1);
+ }
+ . = ALIGN(32 / 8);
+ . = ALIGN(32 / 8);
+ _end = .; PROVIDE (end = .);
+ . = DATA_SEGMENT_END (.);
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+ /* DWARF debug sections.
+ Symbols in the DWARF debugging sections are relative to the beginning
+ of the section so we begin them at 0. */
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+ .line 0 : { *(.line) }
+ /* GNU DWARF 1 extensions */
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+ /* DWARF 2 */
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+ .debug_str 0 : { *(.debug_str) }
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+ /* SGI/MIPS DWARF 2 extensions */
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+ .debug_funcnames 0 : { *(.debug_funcnames) }
+ .debug_typenames 0 : { *(.debug_typenames) }
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+ /* DWARF 3 */
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+ .debug_ranges 0 : { *(.debug_ranges) }
+ .gnu.attributes 0 : { KEEP (*(.gnu.attributes)) }
+ /DISCARD/ : { *(.note.GNU-stack) *(.gnu_debuglink) *(.gnu.lto_*) }
+}
+
notaz.gp2x.de / ginge.git / commitdiff