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charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Host-Lookup-Failed: Reverse DNS lookup failed for 2a00:1450:4864:20::62f (failed) Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::62f; envelope-from=alex.bennee@linaro.org; helo=mail-ej1-x62f.google.com X-Spam_score_int: -6 X-Spam_score: -0.7 X-Spam_bar: / X-Spam_report: (-0.7 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, PDS_HP_HELO_NORDNS=0.659, RCVD_IN_DNSWL_NONE=-0.0001, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "open list:ARM TCG CPUs" , =?UTF-8?q?Alex=20Benn=C3=A9e?= , qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZM-MESSAGEID: 1646130226517100001 This allows us to check our new SYS_HEAPINFO implementation generates sane values. Signed-off-by: Alex Benn=C3=A9e Reviewed-by: Peter Maydell Message-Id: <20220225172021.3493923-19-alex.bennee@linaro.org> diff --git a/tests/tcg/aarch64/system/semiheap.c b/tests/tcg/aarch64/system= /semiheap.c new file mode 100644 index 0000000000..4ed258476d --- /dev/null +++ b/tests/tcg/aarch64/system/semiheap.c @@ -0,0 +1,93 @@ +/* + * Semihosting System HEAPINFO Test + * + * Copyright (c) 2021 Linaro Ltd + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#include +#include +#include + +#define SYS_HEAPINFO 0x16 + +uintptr_t __semi_call(uintptr_t type, uintptr_t arg0) +{ + register uintptr_t t asm("x0") =3D type; + register uintptr_t a0 asm("x1") =3D arg0; + asm("hlt 0xf000" + : "=3Dr" (t) + : "r" (t), "r" (a0) + : "memory" ); + + return t; +} + +int main(int argc, char *argv[argc]) +{ + struct { + void *heap_base; + void *heap_limit; + void *stack_base; + void *stack_limit; + } info =3D { }; + void *ptr_to_info =3D (void *) &info; + uint32_t *ptr_to_heap; + int i; + + ml_printf("Semihosting Heap Info Test\n"); + + __semi_call(SYS_HEAPINFO, (uintptr_t) &ptr_to_info); + + if (info.heap_base =3D=3D NULL || info.heap_limit =3D=3D NULL) { + ml_printf("null heap: %p -> %p\n", info.heap_base, info.heap_limit= ); + return -1; + } + + /* Error if heap base is above limit */ + if ((uintptr_t) info.heap_base >=3D (uintptr_t) info.heap_limit) { + ml_printf("heap base %p >=3D heap_limit %p\n", + info.heap_base, info.heap_limit); + return -2; + } + + if (info.stack_base =3D=3D NULL) { + ml_printf("null stack: %p -> %p\n", info.stack_base, info.stack_li= mit); + return -3; + } + + /* + * boot.S put our stack somewhere inside the data segment of the + * ELF file, and we know that SYS_HEAPINFO won't pick a range + * that overlaps with part of a loaded ELF file. So the info + * struct (on the stack) should not be inside the reported heap. + */ + if (ptr_to_info > info.heap_base && ptr_to_info < info.heap_limit) { + ml_printf("info appears to be inside the heap: %p in %p:%p\n", + ptr_to_info, info.heap_base, info.heap_limit); + return -4; + } + + ml_printf("heap: %p -> %p\n", info.heap_base, info.heap_limit); + ml_printf("stack: %p <- %p\n", info.stack_limit, info.stack_base); + + /* finally can we read/write the heap */ + ptr_to_heap =3D (uint32_t *) info.heap_base; + for (i =3D 0; i < 512; i++) { + *ptr_to_heap++ =3D i; + } + ptr_to_heap =3D (uint32_t *) info.heap_base; + for (i =3D 0; i < 512; i++) { + uint32_t tmp =3D *ptr_to_heap; + if (tmp !=3D i) { + ml_printf("unexpected value in heap: %d @ %p", tmp, ptr_to_hea= p); + return -5; + } + ptr_to_heap++; + } + ml_printf("r/w to heap upto %p\n", ptr_to_heap); + + ml_printf("Passed HeapInfo checks\n"); + return 0; +} diff --git a/MAINTAINERS b/MAINTAINERS index fa8adc2618..68adaac373 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -3549,6 +3549,7 @@ S: Maintained F: semihosting/ F: include/semihosting/ F: tests/tcg/multiarch/arm-compat-semi/ +F: tests/tcg/aarch64/system/semiheap.c =20 Multi-process QEMU M: Elena Ufimtseva --=20 2.30.2