OpenE2K/qemu-e2k
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0c317eb3dd
qemu-e2k/target/arm
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Peter Maydell 0c317eb3dd target/arm: Add missing 'return's after calling v7m_exception_taken() 
In do_v7m_exception_exit(), we perform various checks as part of
performing the exception return.  If one of these checks fails, the
architecture requires that we take an appropriate exception on the
existing stackframe.  We implement this by calling
v7m_exception_taken() to set up to take the new exception, and then
immediately returning from do_v7m_exception_exit() without proceeding
any further with the unstack-and-exception-return process.

In a couple of checks that are new in v8.1M, we forgot the "return"
statement, with the effect that if bad code in the guest tripped over
these checks we would set up to take a UsageFault exception but then
blunder on trying to also unstack and return from the original
exception, with the probable result that the guest would crash.

Add the missing return statements.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210723162146.5167-3-peter.maydell@linaro.org
2021-07-27 10:57:39 +01:00
..
a32-uncond.decode arm tcg cpus: Fix Lesser GPL version number 2020-11-15 16:42:14 +01:00
a32.decode arm tcg cpus: Fix Lesser GPL version number 2020-11-15 16:42:14 +01:00
arch_dump.c target/arm: add spaces around operator 2020-11-10 11:03:47 +00:00
arm_ldst.h arm tcg cpus: Fix Lesser GPL version number 2020-11-15 16:42:14 +01:00
arm-powerctl.c arm/arm-powerctl: rebuild hflags after setting CP15 bits in arm_set_cpu_on() 2019-12-20 14:03:00 +00:00
arm-powerctl.h target/arm/arm-powerctl: Add new arm_set_cpu_on_and_reset() 2019-02-28 11:03:04 +00:00
cpu64.c target/arm: Implement MTE3 2021-06-24 14:58:48 +01:00
cpu_tcg.c target/arm: Implement debug_check_breakpoint 2021-07-21 07:47:04 -10:00
cpu-param.h linux-user/aarch64: Implement PR_TAGGED_ADDR_ENABLE 2021-02-16 13:06:16 +00:00
cpu-qom.h qom: Remove module_obj_name parameter from OBJECT_DECLARE* macros 2020-09-18 14:12:32 -04:00
cpu.c target/arm: Implement debug_check_breakpoint 2021-07-21 07:47:04 -10:00
cpu.h target/arm: Add isar_feature_{aa32, aa64, aa64_sve}_bf16 2021-06-03 16:43:25 +01:00
crypto_helper.c arm tcg cpus: Fix Lesser GPL version number 2020-11-15 16:42:14 +01:00
debug_helper.c accel/tcg: Remove TranslatorOps.breakpoint_check 2021-07-21 07:47:05 -10:00
gdbstub64.c arm tcg cpus: Fix Lesser GPL version number 2020-11-15 16:42:14 +01:00
gdbstub.c target/arm: Enforce that M-profile SP low 2 bits are always zero 2021-07-27 10:57:39 +01:00
helper-a64.c tcg: Rename helper_atomic_*_mmu and provide for user-only 2021-07-21 07:45:38 -10:00
helper-a64.h target/arm: Merge mte_check1, mte_checkN 2021-04-30 11:16:49 +01:00
helper-mve.h target/arm: Implement MVE shifts by register 2021-07-02 11:48:38 +01:00
helper-sve.h target/arm: Implement vector float32 to bfloat16 conversion 2021-06-03 16:43:26 +01:00
helper.c target/arm: Fix offsets for TTBCR 2021-07-18 10:59:46 +01:00
helper.h accel/tcg: Remove TranslatorOps.breakpoint_check 2021-07-21 07:47:05 -10:00
idau.h Use DECLARE_*CHECKER* macros 2020-09-09 09:27:09 -04:00
internals.h target/arm: Implement debug_check_breakpoint 2021-07-21 07:47:04 -10:00
iwmmxt_helper.c arm tcg cpus: Fix Lesser GPL version number 2020-11-15 16:42:14 +01:00
Kconfig meson: Introduce target-specific Kconfig 2021-07-09 18:21:34 +02:00
kvm64.c target/arm: Use acpi_ghes_present() to see if we report ACPI memory errors 2021-06-21 16:49:37 +01:00
kvm_arm.h hw/arm/virt: KVM: The IPA lower bound is 32 2021-03-12 12:47:11 +00:00
kvm-consts.h target/arm: Remove no-longer-reachable 32-bit KVM code 2020-09-14 14:23:19 +01:00
kvm-stub.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
kvm.c hw/arm/virt: KVM: The IPA lower bound is 32 2021-03-12 12:47:11 +00:00
m_helper.c target/arm: Add missing 'return's after calling v7m_exception_taken() 2021-07-27 10:57:39 +01:00
m-nocp.decode target/arm: Don't NOCP fault for FPCXT_NS accesses 2021-06-21 16:49:37 +01:00
machine.c target/arm: Make FPSCR.LTPSIZE writable for MVE 2021-06-03 16:43:25 +01:00
meson.build target/arm: Implement MVE VLDR/VSTR (non-widening forms) 2021-06-21 16:49:38 +01:00
monitor.c target/arm: Add cpu properties to control pauth 2021-01-19 14:38:51 +00:00
mte_helper.c target/arm: Implement MTE3 2021-06-24 14:58:48 +01:00
mve_helper.c target/arm: Implement MVE shifts by register 2021-07-02 11:48:38 +01:00
mve.decode target/arm: Implement MVE VADDLV 2021-07-02 11:48:37 +01:00
neon_helper.c target/arm: Split out saturating/rounding shifts from neon 2021-05-25 16:01:43 +01:00
neon-dp.decode target/arm: Implement vector float32 to bfloat16 conversion 2021-06-03 16:43:26 +01:00
neon-ls.decode target/arm: Remove duplicate 'plus1' function from Neon and SVE decode 2021-07-18 10:59:47 +01:00
neon-shared.decode target/arm: Remove duplicate 'plus1' function from Neon and SVE decode 2021-07-18 10:59:47 +01:00
op_addsub.h Move target-* CPU file into a target/ folder 2016-12-20 21:52:12 +01:00
op_helper.c target/arm: use raise_exception_ra for stack limit exception 2021-06-03 16:43:25 +01:00
pauth_helper.c target/arm: Implement an IMPDEF pauth algorithm 2021-01-19 14:38:51 +00:00
psci.c sysemu: Split sysemu/runstate.h off sysemu/sysemu.h 2019-08-16 13:37:36 +02:00
sve_helper.c bitops.h: Provide hswap32(), hswap64(), wswap64() swapping operations 2021-06-16 14:33:52 +01:00
sve.decode target/arm: Remove duplicate 'plus1' function from Neon and SVE decode 2021-07-18 10:59:47 +01:00
syndrome.h target/arm: Split out syndrome.h from internals.h 2021-02-16 13:16:18 +00:00
t16.decode arm tcg cpus: Fix Lesser GPL version number 2020-11-15 16:42:14 +01:00
t32.decode target/arm: Implement MVE shifts by register 2021-07-02 11:48:38 +01:00
tlb_helper.c target/arm: Set ARMMMUFaultInfo.level in user-only arm_cpu_tlb_fill 2021-03-23 14:07:55 +00:00
trace-events docs: fix references to docs/devel/tracing.rst 2021-06-02 06:51:09 +02:00
trace.h trace: switch position of headers to what Meson requires 2020-08-21 06:18:24 -04:00
translate-a32.h target/arm: Make VMOV scalar <-> gpreg beatwise for MVE 2021-06-24 14:58:48 +01:00
translate-a64.c accel/tcg: Remove TranslatorOps.breakpoint_check 2021-07-21 07:47:05 -10:00
translate-a64.h target/arm: Implement SVE2 XAR 2021-05-25 16:01:44 +01:00
translate-m-nocp.c target/arm: Handle FPU check for FPCXT_NS insns via vfp_access_check_m() 2021-06-21 16:49:38 +01:00
translate-mve.c target/arm: Implement MVE VADDLV 2021-07-02 11:48:37 +01:00
translate-neon.c target/arm: Remove duplicate 'plus1' function from Neon and SVE decode 2021-07-18 10:59:47 +01:00
translate-sve.c target/arm: Remove duplicate 'plus1' function from Neon and SVE decode 2021-07-18 10:59:47 +01:00
translate-vfp.c target/arm: Make VMOV scalar <-> gpreg beatwise for MVE 2021-06-24 14:58:48 +01:00
translate.c target/arm: Enforce that M-profile SP low 2 bits are always zero 2021-07-27 10:57:39 +01:00
translate.h target/arm: Implement MVE shifts by register 2021-07-02 11:48:38 +01:00
vec_helper.c target/arm: Move expand_pred_b() data to vec_helper.c 2021-06-16 14:33:52 +01:00
vec_internal.h target/arm: Move expand_pred_b() data to vec_helper.c 2021-06-16 14:33:52 +01:00
vfp_helper.c target/arm: Check NaN mode before silencing NaN 2021-07-02 11:48:36 +01:00
vfp-uncond.decode arm tcg cpus: Fix Lesser GPL version number 2020-11-15 16:42:14 +01:00
vfp.decode target/arm: Don't NOCP fault for FPCXT_NS accesses 2021-06-21 16:49:37 +01:00