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Mint APE Loader v1.3

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This version has better error messages and safety checks. It supports
loading static position-independent executables. It correctly handles
more kinds of weird ELF program header layouts. A force flag has been
added to avoid system execve(). Finally the longstanding misalignment
with our ELF PT_NOTE section has been addressed.
This commit is contained in:
Justine Tunney 2023-07-23 17:07:38 -07:00
parent 82b1e61443
commit 3d172c99fe
No known key found for this signature in database
GPG key ID: BE714B4575D6E328
19 changed files with 1001 additions and 470 deletions
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84
ape/loader.lds
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@ -1,7 +1,7 @@
/*-*- mode: ld-script; indent-tabs-mode: nil; tab-width: 2; coding: utf-8 -*-│
│vi: set et sts=2 tw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2021 Justine Alexandra Roberts Tunney │
│ Copyright 2023 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
@ -16,26 +16,80 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
ENTRY(_start)
ENTRY(ElfEntrypoint)
PHDRS {
text PT_LOAD FLAGS(1) FILEHDR PHDRS; /* PF_X */
rodata PT_LOAD FLAGS(4); /* PF_R */
stack PT_GNU_STACK FLAGS(6); /* PF_W|PF_R */
note PT_NOTE FLAGS(4); /* PF_R */
}
SECTIONS {
. = 0x7fff0000;
. = SEGMENT_START("text-segment", 0x7f000000);
__executable_start = .;
.rodata : {
KEEP(*(.head))
*(.rodata .rodata.*)
. = ALIGN(4096);
}
. += SIZEOF_HEADERS;
.macho : {
KEEP(*(.macho))
} :text
.note : {
KEEP(*(.note))
} :text :note
.text : {
text = .;
*(.text)
}
*(.text .text.* .gnu.linkonce.t.*)
} :text
.rodata ALIGN(CONSTANT(COMMONPAGESIZE)) : {
*(.rodata .rodata.* .gnu.linkonce.r.*)
} :rodata
.stack : {
*(.stack)
} :stack
_end = .;
.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) }
.gnu.build.attributes : { *(.gnu.build.attributes .gnu.build.attributes.*) }
.debug 0 : { *(.debug) }
.line 0 : { *(.line) }
.debug_srcinfo 0 : { *(.debug_srcinfo) }
.debug_sfnames 0 : { *(.debug_sfnames) }
.debug_aranges 0 : { *(.debug_aranges) }
.debug_pubnames 0 : { *(.debug_pubnames) }
.debug_info 0 : { *(.debug_info .gnu.linkonce.wi.*) }
.debug_abbrev 0 : { *(.debug_abbrev) }
.debug_line 0 : { *(.debug_line .debug_line.* .debug_line_end) }
.debug_frame 0 : { *(.debug_frame) }
.debug_str 0 : { *(.debug_str) }
.debug_loc 0 : { *(.debug_loc) }
.debug_macinfo 0 : { *(.debug_macinfo) }
.debug_weaknames 0 : { *(.debug_weaknames) }
.debug_funcnames 0 : { *(.debug_funcnames) }
.debug_typenames 0 : { *(.debug_typenames) }
.debug_varnames 0 : { *(.debug_varnames) }
.debug_pubtypes 0 : { *(.debug_pubtypes) }
.debug_ranges 0 : { *(.debug_ranges) }
.debug_macro 0 : { *(.debug_macro) }
.debug_addr 0 : { *(.debug_addr) }
.debug_loclists 0 : { *(.debug_loclists) }
.debug_rnglists 0 : { *(.debug_rnglists) }
.debug_line_str 0 : { *(.debug_line_str) }
.debug_extra 0 : { *(.debug_line_str) }
.debug_pubtypes 0 : { *(.debug_pubtypes) }
.gnu.attributes 0 : { KEEP(*(.gnu.attributes)) }
/DISCARD/ : {
*(.*)
}
}
textsz = SIZEOF(.text);
rosize = SIZEOF(.rodata);
filesz = SIZEOF(.rodata) + SIZEOF(.text);