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Mon, 8 Aug 2022 11:50:34 +0000 (GMT) Received: from li-c3569c4c-1ef8-11b2-a85c-ee139cda3133.ibm.com.com (unknown [9.43.59.85]) by d06av25.portsmouth.uk.ibm.com (Postfix) with ESMTP; Mon, 8 Aug 2022 11:50:34 +0000 (GMT) From: Sathvika Vasireddy To: linuxppc-dev@lists.ozlabs.org Cc: jpoimboe@redhat.com, peterz@infradead.org, linux-kernel@vger.kernel.org, aik@ozlabs.ru, mpe@ellerman.id.au, mingo@redhat.com, christophe.leroy@csgroup.eu, rostedt@goodmis.org, mbenes@suse.cz, npiggin@gmail.com, chenzhongjin@huawei.com, linux-arm-kernel@lists.infradead.org, naveen.n.rao@linux.vnet.ibm.com, sv@linux.ibm.com Subject: [PATCH 15/16] objtool/powerpc: Enable objtool to be built on ppc Date: Mon, 8 Aug 2022 17:19:07 +0530 Message-Id: <20220808114908.240813-16-sv@linux.ibm.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20220808114908.240813-1-sv@linux.ibm.com> References: <20220808114908.240813-1-sv@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: J3_Er8N8HuwiGrXK7qbhElLyDyik9RUW X-Proofpoint-GUID: xIX1U9Zr9q5d6fcRWtfHI9SSd2OVfXJ3 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.883,Hydra:6.0.517,FMLib:17.11.122.1 definitions=2022-08-08_08,2022-08-05_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 mlxlogscore=999 bulkscore=0 clxscore=1015 mlxscore=0 adultscore=0 suspectscore=0 phishscore=0 impostorscore=0 spamscore=0 lowpriorityscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2206140000 definitions=main-2208080057 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch adds [stub] implementations for required functions, inorder to enable objtool build on powerpc. Signed-off-by: Sathvika Vasireddy [Christophe Leroy: powerpc: Add missing asm/asm.h for objtool] Signed-off-by: Christophe Leroy --- arch/powerpc/Kconfig | 1 + arch/powerpc/include/asm/asm.h | 7 ++ tools/objtool/arch/powerpc/Build | 2 + tools/objtool/arch/powerpc/decode.c | 74 +++++++++++++++++++ .../arch/powerpc/include/arch/cfi_regs.h | 11 +++ tools/objtool/arch/powerpc/include/arch/elf.h | 8 ++ .../arch/powerpc/include/arch/special.h | 21 ++++++ tools/objtool/arch/powerpc/special.c | 19 +++++ 8 files changed, 143 insertions(+) create mode 100644 arch/powerpc/include/asm/asm.h create mode 100644 tools/objtool/arch/powerpc/Build create mode 100644 tools/objtool/arch/powerpc/decode.c create mode 100644 tools/objtool/arch/powerpc/include/arch/cfi_regs.h create mode 100644 tools/objtool/arch/powerpc/include/arch/elf.h create mode 100644 tools/objtool/arch/powerpc/include/arch/special.h create mode 100644 tools/objtool/arch/powerpc/special.c diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 4c466acdc70d..dc05cd23c233 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -237,6 +237,7 @@ config PPC select HAVE_MOD_ARCH_SPECIFIC select HAVE_NMI if PERF_EVENTS || (PPC64 && PPC_BOOK3S) select HAVE_OPTPROBES + select HAVE_OBJTOOL if PPC32 || MPROFILE_KERNEL select HAVE_PERF_EVENTS select HAVE_PERF_EVENTS_NMI if PPC64 select HAVE_PERF_REGS diff --git a/arch/powerpc/include/asm/asm.h b/arch/powerpc/include/asm/asm.h new file mode 100644 index 000000000000..86f46b604e9a --- /dev/null +++ b/arch/powerpc/include/asm/asm.h @@ -0,0 +1,7 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_POWERPC_ASM_H +#define _ASM_POWERPC_ASM_H + +#define _ASM_PTR " .long " + +#endif /* _ASM_POWERPC_ASM_H */ diff --git a/tools/objtool/arch/powerpc/Build b/tools/objtool/arch/powerpc/Build new file mode 100644 index 000000000000..d24d5636a5b8 --- /dev/null +++ b/tools/objtool/arch/powerpc/Build @@ -0,0 +1,2 @@ +objtool-y += decode.o +objtool-y += special.o diff --git a/tools/objtool/arch/powerpc/decode.c b/tools/objtool/arch/powerpc/decode.c new file mode 100644 index 000000000000..8b6a14680da7 --- /dev/null +++ b/tools/objtool/arch/powerpc/decode.c @@ -0,0 +1,74 @@ +// SPDX-License-Identifier: GPL-2.0-or-later + +#include +#include +#include +#include +#include +#include +#include +#include + +unsigned long arch_dest_reloc_offset(int addend) +{ + return addend; +} + +bool arch_callee_saved_reg(unsigned char reg) +{ + return false; +} + +int arch_decode_hint_reg(u8 sp_reg, int *base) +{ + exit(-1); +} + +const char *arch_nop_insn(int len) +{ + exit(-1); +} + +const char *arch_ret_insn(int len) +{ + exit(-1); +} + +int arch_decode_instruction(struct objtool_file *file, const struct section *sec, + unsigned long offset, unsigned int maxlen, + unsigned int *len, enum insn_type *type, + unsigned long *immediate, + struct list_head *ops_list) +{ + u32 insn; + + *immediate = 0; + insn = bswap_if_needed(file->elf, *(u32 *)(sec->data->d_buf + offset)); + *len = 4; + *type = INSN_OTHER; + + return 0; +} + +unsigned long arch_jump_destination(struct instruction *insn) +{ + return insn->offset + insn->immediate; +} + +void arch_initial_func_cfi_state(struct cfi_init_state *state) +{ + int i; + + for (i = 0; i < CFI_NUM_REGS; i++) { + state->regs[i].base = CFI_UNDEFINED; + state->regs[i].offset = 0; + } + + /* initial CFA (call frame address) */ + state->cfa.base = CFI_SP; + state->cfa.offset = 0; + + /* initial LR (return address) */ + state->regs[CFI_RA].base = CFI_CFA; + state->regs[CFI_RA].offset = 0; +} diff --git a/tools/objtool/arch/powerpc/include/arch/cfi_regs.h b/tools/objtool/arch/powerpc/include/arch/cfi_regs.h new file mode 100644 index 000000000000..59638ebeafc8 --- /dev/null +++ b/tools/objtool/arch/powerpc/include/arch/cfi_regs.h @@ -0,0 +1,11 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ + +#ifndef _OBJTOOL_CFI_REGS_H +#define _OBJTOOL_CFI_REGS_H + +#define CFI_BP 1 +#define CFI_SP CFI_BP +#define CFI_RA 32 +#define CFI_NUM_REGS 33 + +#endif diff --git a/tools/objtool/arch/powerpc/include/arch/elf.h b/tools/objtool/arch/powerpc/include/arch/elf.h new file mode 100644 index 000000000000..3c8ebb7d2a6b --- /dev/null +++ b/tools/objtool/arch/powerpc/include/arch/elf.h @@ -0,0 +1,8 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ + +#ifndef _OBJTOOL_ARCH_ELF +#define _OBJTOOL_ARCH_ELF + +#define R_NONE R_PPC_NONE + +#endif /* _OBJTOOL_ARCH_ELF */ diff --git a/tools/objtool/arch/powerpc/include/arch/special.h b/tools/objtool/arch/powerpc/include/arch/special.h new file mode 100644 index 000000000000..ffef9ada7133 --- /dev/null +++ b/tools/objtool/arch/powerpc/include/arch/special.h @@ -0,0 +1,21 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +#ifndef _PPC_ARCH_SPECIAL_H +#define _PPC_ARCH_SPECIAL_H + +#define EX_ENTRY_SIZE 8 +#define EX_ORIG_OFFSET 0 +#define EX_NEW_OFFSET 4 + +#define JUMP_ENTRY_SIZE 16 +#define JUMP_ORIG_OFFSET 0 +#define JUMP_NEW_OFFSET 4 +#define JUMP_KEY_OFFSET 8 + +#define ALT_ENTRY_SIZE 12 +#define ALT_ORIG_OFFSET 0 +#define ALT_NEW_OFFSET 4 +#define ALT_FEATURE_OFFSET 8 +#define ALT_ORIG_LEN_OFFSET 10 +#define ALT_NEW_LEN_OFFSET 11 + +#endif /* _PPC_ARCH_SPECIAL_H */ diff --git a/tools/objtool/arch/powerpc/special.c b/tools/objtool/arch/powerpc/special.c new file mode 100644 index 000000000000..d33868147196 --- /dev/null +++ b/tools/objtool/arch/powerpc/special.c @@ -0,0 +1,19 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +#include +#include +#include +#include + + +bool arch_support_alt_relocation(struct special_alt *special_alt, + struct instruction *insn, + struct reloc *reloc) +{ + exit(-1); +} + +struct reloc *arch_find_switch_table(struct objtool_file *file, + struct instruction *insn) +{ + exit(-1); +} -- 2.31.1