unicorn/qemu
Peter Maydell 250e263ae3 target/arm: Make M-profile VTOR loads on reset handle memory aliasing
For Arm M-profile CPUs, on reset the CPU must load its initial PC and
SP from a vector table in guest memory. Because we can't guarantee
reset ordering, we have to handle the possibility that the ROM blob
loader's reset function has not yet run when the CPU resets, in which
case the data in an ELF file specified by the user won't be in guest
memory to be read yet.

We work around the reset ordering problem by checking whether the ROM
blob loader has any data for the address where the vector table is,
using rom_ptr(). Unfortunately this does not handle the possibility
of memory aliasing. For many M-profile boards, memory can be
accessed via multiple possible physical addresses; if the board has
the vector table at address X but the user's ELF file loads data via
a different address Y which is an alias to the same underlying guest
RAM then rom_ptr() will not find it.

Use the new rom_ptr_for_as() function, which deals with memory
aliasing when locating a relevant ROM blob.

Backports 75ce72b785a7c9fcb9af2779854142a34825da59
2021-03-30 15:24:23 -04:00
..
accel qemu/atomic.h: rename atomic_ to qatomic_ 2021-03-08 14:34:35 -05:00
crypto
default-configs target/riscv: Initial introduction of the RISC-V target 2019-03-08 21:46:10 -05:00
docs docs/devel/memory.txt: Document _with_attrs accessors 2018-10-04 04:46:26 -04:00
fpu softfloat: Define misc operations for bfloat16 2021-02-27 16:41:46 -05:00
hw target/arm: Set instance_align on CPUARM TypeInfo 2021-03-01 18:58:44 -05:00
include include/exec: lightly re-arrange TranslationBlock 2021-03-09 13:25:04 -05:00
qapi qapi: Rewrite string-input-visitor's integer and list parsing 2018-12-18 04:57:25 -05:00
qobject qstring: Move qstring_from_substr()'s @end one to the right 2018-08-02 21:24:19 -04:00
qom qemu/atomic.h: rename atomic_ to qatomic_ 2021-03-08 14:34:35 -05:00
scripts decodetree: Open files with encoding='utf-8' 2021-03-04 13:34:08 -05:00
target target/arm: Make M-profile VTOR loads on reset handle memory aliasing 2021-03-30 15:24:23 -04:00
tcg tcg: Fix prototypes for tcg_out_vec_op and tcg_out_op 2021-03-30 14:56:57 -04:00
util qemu/atomic.h: rename atomic_ to qatomic_ 2021-03-08 14:34:35 -05:00
aarch64.h target/arm: Speed up aarch64 TBL/TBX 2021-03-08 11:31:24 -05:00
aarch64eb.h target/arm: Speed up aarch64 TBL/TBX 2021-03-08 11:31:24 -05:00
accel.c target/arm: Set instance_align on CPUARM TypeInfo 2021-03-01 18:58:44 -05:00
arm.h qemu/compiler: Split out qemu_build_not_reached_always 2021-03-04 15:23:27 -05:00
armeb.h qemu/compiler: Split out qemu_build_not_reached_always 2021-03-04 15:23:27 -05:00
CODING_STYLE.rst docs: split the CODING_STYLE doc into distinct groups 2019-11-28 02:54:44 -05:00
configure configure: Support -static-pie if requested 2020-04-30 07:09:34 -04:00
COPYING
COPYING.LIB
cpus.c qemu/atomic.h: rename atomic_ to qatomic_ 2021-03-08 14:34:35 -05:00
exec.c qemu/atomic.h: rename atomic_ to qatomic_ 2021-03-08 14:34:35 -05:00
gen_all_header.sh
glib_compat.c tcg: Introduce TYPE_CONST temporaries 2021-03-03 21:29:40 -05:00
header_gen.py target/riscv: propagate PMP permission to TLB page 2021-03-30 15:05:40 -04:00
ioport.c
LICENSE
m68k.h qemu/compiler: Split out qemu_build_not_reached_always 2021-03-04 15:23:27 -05:00
Makefile Makefile: Rename targets for make recursion 2019-08-08 17:26:49 -04:00
Makefile.objs qapi: Move qapi-schema.json to qapi/, rename generated files 2018-03-09 11:35:11 -05:00
Makefile.target configure: Remove old -fno-gcse workaround for GCC 4.6.x and 4.7.[012] 2018-12-18 03:52:36 -05:00
memory.c qemu/atomic.h: rename atomic_ to qatomic_ 2021-03-08 14:34:35 -05:00
memory_ldst.inc.c memory: Single byte swap along the I/O path 2020-01-07 19:12:04 -05:00
memory_mapping.c
mips.h qemu/compiler: Split out qemu_build_not_reached_always 2021-03-04 15:23:27 -05:00
mips64.h qemu/compiler: Split out qemu_build_not_reached_always 2021-03-04 15:23:27 -05:00
mips64el.h qemu/compiler: Split out qemu_build_not_reached_always 2021-03-04 15:23:27 -05:00
mipsel.h qemu/compiler: Split out qemu_build_not_reached_always 2021-03-04 15:23:27 -05:00
powerpc.h qemu/compiler: Split out qemu_build_not_reached_always 2021-03-04 15:23:27 -05:00
qemu-timer.c
riscv32.h target/riscv: propagate PMP permission to TLB page 2021-03-30 15:05:40 -04:00
riscv64.h target/riscv: propagate PMP permission to TLB page 2021-03-30 15:05:40 -04:00
rules.mak build-sys: silence make by default or V=0 2018-03-06 08:58:03 -05:00
sparc.h qemu/compiler: Split out qemu_build_not_reached_always 2021-03-04 15:23:27 -05:00
sparc64.h qemu/compiler: Split out qemu_build_not_reached_always 2021-03-04 15:23:27 -05:00
unicorn_common.h tcg: Move sorted_args into TCGArgConstraint.sort_index 2021-03-01 19:33:45 -05:00
VERSION Open 6.0 development tree 2021-03-02 13:39:05 -05:00
vl.c Use cpu_create(type) instead of cpu_init(cpu_model) 2018-03-20 14:20:30 -04:00
vl.h
x86_64.h qemu/compiler: Split out qemu_build_not_reached_always 2021-03-04 15:23:27 -05:00