/* * Shared linker script for the minimal coreutils (tools/echo_elf.zig, * tools/cat_elf.zig). Identical single-PT_LOAD shape to * tools/fsh_linker.ld: one R+X LOAD at base 0, _start shim entry, no * page-crossing PAD. echo and cat have the same link needs, so one * script serves both rather than two byte-identical forks. * * Layout: * . = 0 — start of the only LOAD segment, page-aligned. * .text — code; the _start shim symbol lives here. e_entry is * set from _start via ENTRY(_start). * .rodata* — string literals (diagnostics, separators). * .data* — comptime-emitted constants (expected zero-sized). * .bss* — zero-initialized data (expected zero-sized; the * coreutils keep their buffers on the user stack so * this stays empty — a non-zero .bss would store-fault * on first write because the LOAD is R+X). * * eh_frame/note/comment/dyn* are discarded — these payloads emit no * unwind tables, and the stock LLD layout would otherwise split * .eh_frame_hdr / .eh_frame into a leading R-only LOAD that bumps .text * past the page-aligned base the FlashOS loader requires. */ ENTRY(_start) PHDRS { text PT_LOAD FLAGS(5); /* PF_R | PF_X */ } SECTIONS { . = 0; .text : { *(.text._start) *(.text .text.*) *(.rodata .rodata.*) *(.data .data.*) *(.bss .bss.*) *(COMMON) } :text /DISCARD/ : { *(.eh_frame*) *(.note*) *(.comment*) *(.dynamic) *(.dynsym) *(.dynstr) *(.gnu.hash) *(.hash) *(.gnu.version*) *(.interp) *(.rela*) *(.rel*) } }