From: Peter Maydell <peter.maydell@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PULL 02/34] exynos4210_gic: Suppress gcc9 format-truncation warnings
Date: Mon, 16 Dec 2019 11:08:32 +0000 [thread overview]
Message-ID: <20191216110904.30815-3-peter.maydell@linaro.org> (raw)
In-Reply-To: <20191216110904.30815-1-peter.maydell@linaro.org>
From: David Gibson <david@gibson.dropbear.id.au>
exynos4210_gic_realize() prints the number of cpus into some temporary
buffers, but it only allows 3 bytes space for it. That's plenty:
existing machines will only ever set this value to EXYNOS4210_NCPUS
(2). But the compiler can't always figure that out, so some[*] gcc9
versions emit -Wformat-truncation warnings.
We can fix that by hinting the constraint to the compiler with a
suitably placed assert().
[*] The bizarre thing here, is that I've long gotten these warnings
compiling in a 32-bit x86 container as host - Fedora 30 with
gcc-9.2.1-1.fc30.i686 - but it compiles just fine on my normal
x86_64 host - Fedora 30 with and gcc-9.2.1-1.fc30.x86_64.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
[PMM: deleted stray blank line]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
hw/intc/exynos4210_gic.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/hw/intc/exynos4210_gic.c b/hw/intc/exynos4210_gic.c
index a1b699b6bab..9a84d8522e9 100644
--- a/hw/intc/exynos4210_gic.c
+++ b/hw/intc/exynos4210_gic.c
@@ -293,6 +293,7 @@ static void exynos4210_gic_realize(DeviceState *dev, Error **errp)
char cpu_alias_name[sizeof(cpu_prefix) + 3];
char dist_alias_name[sizeof(cpu_prefix) + 3];
SysBusDevice *gicbusdev;
+ uint32_t n = s->num_cpu;
uint32_t i;
s->gic = qdev_create(NULL, "arm_gic");
@@ -313,7 +314,13 @@ static void exynos4210_gic_realize(DeviceState *dev, Error **errp)
memory_region_init(&s->dist_container, obj, "exynos4210-dist-container",
EXYNOS4210_EXT_GIC_DIST_REGION_SIZE);
- for (i = 0; i < s->num_cpu; i++) {
+ /*
+ * This clues in gcc that our on-stack buffers do, in fact have
+ * enough room for the cpu numbers. gcc 9.2.1 on 32-bit x86
+ * doesn't figure this out, otherwise and gives spurious warnings.
+ */
+ assert(n <= EXYNOS4210_NCPUS);
+ for (i = 0; i < n; i++) {
/* Map CPU interface per SMP Core */
sprintf(cpu_alias_name, "%s%x", cpu_prefix, i);
memory_region_init_alias(&s->cpu_alias[i], obj,
--
2.20.1
next prev parent reply other threads:[~2019-12-16 11:23 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-16 11:08 [PULL 00/34] target-arm queue Peter Maydell
2019-12-16 11:08 ` [PULL 01/34] target/arm: Add support for cortex-m7 CPU Peter Maydell
2019-12-16 11:08 ` Peter Maydell [this message]
2019-12-16 11:08 ` [PULL 03/34] aspeed/i2c: Add support for pool buffer transfers Peter Maydell
2019-12-16 11:08 ` [PULL 04/34] aspeed/i2c: Check SRAM enablement on AST2500 Peter Maydell
2019-12-16 11:08 ` [PULL 05/34] aspeed: Add a DRAM memory region at the SoC level Peter Maydell
2019-12-16 11:08 ` [PULL 06/34] aspeed/i2c: Add support for DMA transfers Peter Maydell
2019-12-16 11:08 ` [PULL 07/34] aspeed/i2c: Add trace events Peter Maydell
2019-12-16 11:08 ` [PULL 08/34] aspeed/sdmc: Make ast2600 default 1G Peter Maydell
2019-12-16 11:08 ` [PULL 09/34] aspeed/scu: Fix W1C behavior Peter Maydell
2019-12-16 11:08 ` [PULL 10/34] watchdog/aspeed: Improve watchdog timeout message Peter Maydell
2019-12-16 11:08 ` [PULL 11/34] watchdog/aspeed: Fix AST2600 frequency behaviour Peter Maydell
2019-12-16 11:08 ` [PULL 12/34] aspeed/smc: Restore default AHB window mapping at reset Peter Maydell
2019-12-16 11:08 ` [PULL 13/34] aspeed/smc: Do not map disabled segment on the AST2600 Peter Maydell
2019-12-16 11:08 ` [PULL 14/34] aspeed/smc: Add AST2600 timings registers Peter Maydell
2019-12-16 11:08 ` [PULL 15/34] aspeed: Remove AspeedBoardConfig array and use AspeedMachineClass Peter Maydell
2019-12-16 11:08 ` [PULL 16/34] aspeed: Add support for the tacoma-bmc board Peter Maydell
2019-12-16 11:08 ` [PULL 17/34] gpio: fix memory leak in aspeed_gpio_init() Peter Maydell
2019-12-16 11:08 ` [PULL 18/34] aspeed: Change the "scu" property definition Peter Maydell
2019-12-16 11:08 ` [PULL 19/34] aspeed: Change the "nic" " Peter Maydell
2019-12-16 11:08 ` [PULL 20/34] target/arm: Honor HCR_EL2.TID2 trapping requirements Peter Maydell
2019-12-16 11:08 ` [PULL 21/34] target/arm: Honor HCR_EL2.TID1 " Peter Maydell
2019-12-16 11:08 ` [PULL 22/34] target/arm: Handle trapping to EL2 of AArch32 VMRS instructions Peter Maydell
2019-12-16 11:08 ` [PULL 23/34] target/arm: Handle AArch32 CP15 trapping via HSTR_EL2 Peter Maydell
2019-12-16 11:08 ` [PULL 24/34] target/arm: Add support for missing Jazelle system registers Peter Maydell
2019-12-16 11:08 ` [PULL 25/34] arm/arm-powerctl: set NSACR.{CP11, CP10} bits in arm_set_cpu_on() Peter Maydell
2019-12-16 11:08 ` [PULL 26/34] tcg: cputlb: Add probe_read Peter Maydell
2019-12-16 11:08 ` [PULL 27/34] Memory: Enable writeback for given memory region Peter Maydell
2019-12-16 11:08 ` [PULL 28/34] migration: ram: Switch to ram block writeback Peter Maydell
2019-12-16 11:08 ` [PULL 29/34] target/arm: Add support for DC CVAP & DC CVADP ins Peter Maydell
2019-12-16 11:09 ` [PULL 30/34] hw/arm/sbsa-ref: Simplify by moving the gic in the machine state Peter Maydell
2019-12-16 11:09 ` [PULL 31/34] hw/arm/acpi: simplify AML bit and/or statement Peter Maydell
2019-12-16 11:09 ` [PULL 32/34] hw/arm/acpi: enable SHPC native hot plug Peter Maydell
2019-12-16 11:09 ` [PULL 33/34] hw/arm/virt: Simplify by moving the gic in the machine state Peter Maydell
2019-12-16 11:09 ` [PULL 34/34] target/arm: ensure we use current exception state after SCR update Peter Maydell
2019-12-16 14:07 ` [PULL 00/34] target-arm queue Peter Maydell
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