19787b0299
commit e9c9cb90e76ffaabcc7ca8f275d9e82195fd6367 upstream.
When debugging vmlinux with QEMU + GDB, the following GDB error may
occur:
(gdb) c
Continuing.
Warning:
Cannot insert breakpoint -1.
Cannot access memory at address 0xffffffffffff95c0
Command aborted.
(gdb)
The reason is that, when .interp section is present, GDB tries to
locate the file specified in it in memory and put a number of
breakpoints there (see enable_break() function in gdb/solib-svr4.c).
Sometimes GDB finds a bogus location that matches its heuristics,
fails to set a breakpoint and stops. This makes further debugging
impossible.
The .interp section contains misleading information anyway (vmlinux
does not need ld.so), so fix by discarding it.
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
158 lines
3.2 KiB
ArmAsm
158 lines
3.2 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0 */
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/* ld script to make s390 Linux kernel
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* Written by Martin Schwidefsky (schwidefsky@de.ibm.com)
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*/
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#include <asm/thread_info.h>
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#include <asm/page.h>
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/*
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* Put .bss..swapper_pg_dir as the first thing in .bss. This will
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* make sure it has 16k alignment.
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*/
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#define BSS_FIRST_SECTIONS *(.bss..swapper_pg_dir)
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/* Handle ro_after_init data on our own. */
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#define RO_AFTER_INIT_DATA
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#include <asm-generic/vmlinux.lds.h>
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OUTPUT_FORMAT("elf64-s390", "elf64-s390", "elf64-s390")
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OUTPUT_ARCH(s390:64-bit)
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ENTRY(startup_continue)
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jiffies = jiffies_64;
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PHDRS {
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text PT_LOAD FLAGS(5); /* R_E */
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data PT_LOAD FLAGS(7); /* RWE */
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note PT_NOTE FLAGS(0); /* ___ */
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}
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SECTIONS
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{
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. = 0x100000;
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.text : {
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_stext = .; /* Start of text section */
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_text = .; /* Text and read-only data */
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HEAD_TEXT
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TEXT_TEXT
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SCHED_TEXT
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CPUIDLE_TEXT
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LOCK_TEXT
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KPROBES_TEXT
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IRQENTRY_TEXT
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SOFTIRQENTRY_TEXT
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*(.text.*_indirect_*)
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*(.fixup)
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*(.gnu.warning)
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. = ALIGN(PAGE_SIZE);
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_etext = .; /* End of text section */
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} :text = 0x0700
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NOTES :text :note
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.dummy : { *(.dummy) } :data
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RO_DATA_SECTION(PAGE_SIZE)
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. = ALIGN(PAGE_SIZE);
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_sdata = .; /* Start of data section */
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. = ALIGN(PAGE_SIZE);
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__start_ro_after_init = .;
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.data..ro_after_init : {
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*(.data..ro_after_init)
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}
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EXCEPTION_TABLE(16)
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. = ALIGN(PAGE_SIZE);
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__end_ro_after_init = .;
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RW_DATA_SECTION(0x100, PAGE_SIZE, THREAD_SIZE)
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_edata = .; /* End of data section */
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/* will be freed after init */
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. = ALIGN(PAGE_SIZE); /* Init code and data */
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__init_begin = .;
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. = ALIGN(PAGE_SIZE);
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.init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
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_sinittext = .;
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INIT_TEXT
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. = ALIGN(PAGE_SIZE);
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_einittext = .;
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}
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/*
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* .exit.text is discarded at runtime, not link time,
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* to deal with references from __bug_table
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*/
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.exit.text : {
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EXIT_TEXT
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}
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.exit.data : {
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EXIT_DATA
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}
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/*
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* struct alt_inst entries. From the header (alternative.h):
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* "Alternative instructions for different CPU types or capabilities"
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* Think locking instructions on spinlocks.
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* Note, that it is a part of __init region.
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*/
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. = ALIGN(8);
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.altinstructions : {
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__alt_instructions = .;
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*(.altinstructions)
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__alt_instructions_end = .;
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}
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/*
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* And here are the replacement instructions. The linker sticks
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* them as binary blobs. The .altinstructions has enough data to
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* get the address and the length of them to patch the kernel safely.
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* Note, that it is a part of __init region.
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*/
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.altinstr_replacement : {
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*(.altinstr_replacement)
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}
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/*
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* Table with the patch locations to undo expolines
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*/
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. = ALIGN(4);
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.nospec_call_table : {
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__nospec_call_start = . ;
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*(.s390_indirect*)
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__nospec_call_end = . ;
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}
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.nospec_return_table : {
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__nospec_return_start = . ;
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*(.s390_return*)
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__nospec_return_end = . ;
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}
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/* early.c uses stsi, which requires page aligned data. */
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. = ALIGN(PAGE_SIZE);
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INIT_DATA_SECTION(0x100)
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PERCPU_SECTION(0x100)
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. = ALIGN(PAGE_SIZE);
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__init_end = .; /* freed after init ends here */
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BSS_SECTION(PAGE_SIZE, 4 * PAGE_SIZE, PAGE_SIZE)
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_end = . ;
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/* Debugging sections. */
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STABS_DEBUG
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DWARF_DEBUG
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/* Sections to be discarded */
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DISCARDS
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/DISCARD/ : {
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*(.eh_frame)
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*(.interp)
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}
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}
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