From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf1-x42e.google.com (mail-pf1-x42e.google.com [IPv6:2607:f8b0:4864:20::42e]) by sourceware.org (Postfix) with ESMTPS id 79B39385E000 for ; Sun, 22 Mar 2020 12:53:22 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org 79B39385E000 Received: by mail-pf1-x42e.google.com with SMTP id i13so6055887pfe.3 for ; Sun, 22 Mar 2020 05:53:22 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:subject:message-id:mime-version :content-disposition:user-agent; bh=58Q5DW7wRUKYHeLIi5hlUfY2Cup8b0/L4h7466OFs74=; b=Owi1OqVPMozEcT28AcFn48PkaSoa1puAkxmT/EJ9QN2UJYlzc+nSxo+P9cI55iHRb+ Ztd2hikD8jioqfxtQC4a07Ke4bV+0/VO4a5/kRpSG6EGqwu0RRdQDrBCB/4BcYbmjkzI TFIyPr5Y9GmucPDiGMrZKAdI+2KWqvQylG62xOKEvHlfVE45PkFD2JxffVjzuFfb4bB5 ISFadAqQVYnZU3ZZx4XQMSmDsBPQoLQewI2hgegIx8J2srcEge5TyV3Hc7KHSkkcI/hQ 7KAa0vWbfeJgF3Vb1SBpOUJKxEP9GvUmlp8BGnNFV80SwTZTP+WOapfbbvd5381XQduB JzjQ== X-Gm-Message-State: ANhLgQ0H3tDqCYayX4l+sjM9dC4dl7QmA0bOL4m7Rm7tzb1a5apIhkHh ovvVSCOTbOJFc8yigcrGuTslDArSi7o= X-Google-Smtp-Source: ADFU+vuZTfs88EcYeyspKvj86RLc16xmTQWjIS/McbPiBeUw2F4yFv2La7x948/VX4FiwWFI7cX65w== X-Received: by 2002:aa7:9f49:: with SMTP id h9mr17284093pfr.217.1584881599630; Sun, 22 Mar 2020 05:53:19 -0700 (PDT) Received: from bubble.grove.modra.org ([2406:3400:51d:8cc0:6120:5ee0:cb93:ed00]) by smtp.gmail.com with ESMTPSA id s39sm9843571pjb.10.2020.03.22.05.53.17 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 22 Mar 2020 05:53:18 -0700 (PDT) Received: by bubble.grove.modra.org (Postfix, from userid 1000) id BADAC88E40; Sun, 22 Mar 2020 23:23:14 +1030 (ACDT) Date: Sun, 22 Mar 2020 23:23:14 +1030 From: Alan Modra To: binutils@sourceware.org Subject: s12z disassembler tidy Message-ID: <20200322125314.GN4583@bubble.grove.modra.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.9.4 (2018-02-28) X-Spam-Status: No, score=-26.3 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, FREEMAIL_FROM, GIT_PATCH_0, GIT_PATCH_1, GIT_PATCH_2, GIT_PATCH_3, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on server2.sourceware.org X-BeenThere: binutils@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Binutils mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 22 Mar 2020 12:53:27 -0000 Don't ignore buffer memory read failure, or malloc failure. Lots of functions get a return status to pass these failures up the chain in this patch. opcodes/ * s12z-dis.c (abstract_read_memory): Don't print error on EOI. * s12z-opc.c: Formatting. (operands_f): Return an int. (opr_n_bytes_p1): Return -1 on reaching buffer memory limit. (opr_n_bytes2, bfextins_n_bytes, mul_n_bytes, bm_n_bytes), (shift_n_bytes, mov_imm_opr_n_bytes, loop_prim_n_bytes), (exg_sex_discrim): Likewise. (create_immediate_operand, create_bitfield_operand), (create_register_operand_with_size, create_register_all_operand), (create_register_all16_operand, create_simple_memory_operand), (create_memory_operand, create_memory_auto_operand): Don't segfault on malloc failure. (z_ext24_decode): Return an int status, negative on fail, zero on success. (x_imm1, imm1_decode, trap_decode, z_opr_decode, z_opr_decode2), (imm1234, reg_s_imm, reg_s_opr, z_imm1234_8base, z_imm1234_0base), (z_tfr, z_reg, reg_xy, lea_reg_xys_opr, lea_reg_xys, rel_15_7), (decode_rel_15_7, cmp_xy, sub_d6_x_y, sub_d6_y_x), (ld_18bit_decode, mul_decode, bm_decode, bm_rel_decode), (mov_imm_opr, ld_18bit_decode, exg_sex_decode), (loop_primitive_decode, shift_decode, psh_pul_decode), (bit_field_decode): Similarly. (z_decode_signed_value, decode_signed_value): Similarly. Add arg to return value, update callers. (x_opr_decode_with_size): Check all reads, returning NULL on fail. Don't segfault on NULL operand. (decode_operation): Return OP_INVALID on first fail. (decode_s12z): Check all reads, returning -1 on fail. gas/ * testsuite/gas/s12z/truncated.d: Update expected output. diff --git a/gas/testsuite/gas/s12z/truncated.d b/gas/testsuite/gas/s12z/truncated.d index c6af5482eb..f4bbb5903e 100644 --- a/gas/testsuite/gas/s12z/truncated.d +++ b/gas/testsuite/gas/s12z/truncated.d @@ -10,8 +10,4 @@ Disassembly of section .text: 00000000 <.text>: 0: 01 nop - 1: Address 0x0000000000000002 is out of bounds. -Address 0x0000000000000002 is out of bounds. -Address 0x0000000000000002 is out of bounds. -!!invalid!! - + 1: 14 !!invalid!! diff --git a/opcodes/s12z-dis.c b/opcodes/s12z-dis.c index 133aed2d85..46d4d7c64c 100644 --- a/opcodes/s12z-dis.c +++ b/opcodes/s12z-dis.c @@ -59,16 +59,9 @@ abstract_read_memory (struct mem_read_abstraction_base *b, { struct mem_read_abstraction *mra = (struct mem_read_abstraction *) b; - int status = - (*mra->info->read_memory_func) (mra->memaddr + offset, - bytes, n, mra->info); - - if (status != 0) - { - (*mra->info->memory_error_func) (status, mra->memaddr, mra->info); - return -1; - } - return 0; + int status = (*mra->info->read_memory_func) (mra->memaddr + offset, + bytes, n, mra->info); + return status != 0 ? -1 : 0; } /* Start of disassembly file. */ @@ -390,7 +383,6 @@ print_insn_s12z (bfd_vma memaddr, struct disassemble_info* info) else (*mra.info->fprintf_func) (mra.info->stream, "%c", shift_size_table[osize]); - } } } diff --git a/opcodes/s12z-opc.c b/opcodes/s12z-opc.c index fe5411cf34..b68a4b815c 100644 --- a/opcodes/s12z-opc.c +++ b/opcodes/s12z-opc.c @@ -31,13 +31,13 @@ #include "s12z-opc.h" -typedef int (* insn_bytes_f) (struct mem_read_abstraction_base *); +typedef int (*insn_bytes_f) (struct mem_read_abstraction_base *); -typedef void (*operands_f) (struct mem_read_abstraction_base *, - int *n_operands, struct operand **operand); +typedef int (*operands_f) (struct mem_read_abstraction_base *, + int *n_operands, struct operand **operand); typedef enum optr (*discriminator_f) (struct mem_read_abstraction_base *, - enum optr hint); + enum optr hint); enum OPR_MODE { @@ -127,15 +127,22 @@ x_opr_n_bytes (struct mem_read_abstraction_base *mra, int offset) static int opr_n_bytes_p1 (struct mem_read_abstraction_base *mra) { - return 1 + x_opr_n_bytes (mra, 0); + int n = x_opr_n_bytes (mra, 0); + if (n < 0) + return n; + return 1 + n; } static int opr_n_bytes2 (struct mem_read_abstraction_base *mra) { int s = x_opr_n_bytes (mra, 0); - s += x_opr_n_bytes (mra, s); - return s + 1; + if (s < 0) + return s; + int n = x_opr_n_bytes (mra, s); + if (n < 0) + return n; + return s + n + 1; } enum BB_MODE @@ -188,7 +195,12 @@ bfextins_n_bytes (struct mem_read_abstraction_base *mra) int n = bbs->n_operands; if (bbs->opr) - n += x_opr_n_bytes (mra, n - 1); + { + int x = x_opr_n_bytes (mra, n - 1); + if (x < 0) + return x; + n += x; + } return n; } @@ -261,10 +273,12 @@ create_immediate_operand (int value) { struct immediate_operand *op = malloc (sizeof (*op)); - ((struct operand *)op)->cl = OPND_CL_IMMEDIATE; - op->value = value; - ((struct operand *)op)->osize = -1; - + if (op != NULL) + { + op->parent.cl = OPND_CL_IMMEDIATE; + op->parent.osize = -1; + op->value = value; + } return (struct operand *) op; } @@ -273,11 +287,13 @@ create_bitfield_operand (int width, int offset) { struct bitfield_operand *op = malloc (sizeof (*op)); - ((struct operand *)op)->cl = OPND_CL_BIT_FIELD; - op->width = width; - op->offset = offset; - ((struct operand *)op)->osize = -1; - + if (op != NULL) + { + op->parent.cl = OPND_CL_BIT_FIELD; + op->parent.osize = -1; + op->width = width; + op->offset = offset; + } return (struct operand *) op; } @@ -286,10 +302,12 @@ create_register_operand_with_size (int reg, short osize) { struct register_operand *op = malloc (sizeof (*op)); - ((struct operand *)op)->cl = OPND_CL_REGISTER; - op->reg = reg; - ((struct operand *)op)->osize = osize; - + if (op != NULL) + { + op->parent.cl = OPND_CL_REGISTER; + op->parent.osize = osize; + op->reg = reg; + } return (struct operand *) op; } @@ -304,9 +322,11 @@ create_register_all_operand (void) { struct register_operand *op = malloc (sizeof (*op)); - ((struct operand *)op)->cl = OPND_CL_REGISTER_ALL; - ((struct operand *)op)->osize = -1; - + if (op != NULL) + { + op->parent.cl = OPND_CL_REGISTER_ALL; + op->parent.osize = -1; + } return (struct operand *) op; } @@ -315,9 +335,11 @@ create_register_all16_operand (void) { struct register_operand *op = malloc (sizeof (*op)); - ((struct operand *)op)->cl = OPND_CL_REGISTER_ALL16; - ((struct operand *)op)->osize = -1; - + if (op != NULL) + { + op->parent.cl = OPND_CL_REGISTER_ALL16; + op->parent.osize = -1; + } return (struct operand *) op; } @@ -325,16 +347,18 @@ create_register_all16_operand (void) static struct operand * create_simple_memory_operand (bfd_vma addr, bfd_vma base, bool relative) { - struct simple_memory_operand *op = malloc (sizeof (*op)); - - ((struct operand *)op)->cl = OPND_CL_SIMPLE_MEMORY; - op->addr = addr; - op->base = base; - op->relative = relative; - ((struct operand *)op)->osize = -1; + struct simple_memory_operand *op; assert (relative || base == 0); - + op = malloc (sizeof (*op)); + if (op != NULL) + { + op->parent.cl = OPND_CL_SIMPLE_MEMORY; + op->parent.osize = -1; + op->addr = addr; + op->base = base; + op->relative = relative; + } return (struct operand *) op; } @@ -343,15 +367,17 @@ create_memory_operand (bool indirect, int base, int n_regs, int reg0, int reg1) { struct memory_operand *op = malloc (sizeof (*op)); - ((struct operand *)op)->cl = OPND_CL_MEMORY; - op->indirect = indirect; - op->base_offset = base; - op->mutation = OPND_RM_NONE; - op->n_regs = n_regs; - op->regs[0] = reg0; - op->regs[1] = reg1; - ((struct operand *)op)->osize = -1; - + if (op != NULL) + { + op->parent.cl = OPND_CL_MEMORY; + op->parent.osize = -1; + op->indirect = indirect; + op->base_offset = base; + op->mutation = OPND_RM_NONE; + op->n_regs = n_regs; + op->regs[0] = reg0; + op->regs[1] = reg1; + } return (struct operand *) op; } @@ -360,28 +386,31 @@ create_memory_auto_operand (enum op_reg_mutation mutation, int reg) { struct memory_operand *op = malloc (sizeof (*op)); - ((struct operand *)op)->cl = OPND_CL_MEMORY; - op->indirect = false; - op->base_offset = 0; - op->mutation = mutation; - op->n_regs = 1; - op->regs[0] = reg; - op->regs[1] = -1; - ((struct operand *)op)->osize = -1; - + if (op != NULL) + { + op->parent.cl = OPND_CL_MEMORY; + op->parent.osize = -1; + op->indirect = false; + op->base_offset = 0; + op->mutation = mutation; + op->n_regs = 1; + op->regs[0] = reg; + op->regs[1] = -1; + } return (struct operand *) op; } -static void +static int z_ext24_decode (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operand) { + struct operand *op; uint8_t buffer[3]; int status = mra->read (mra, 0, 3, buffer); if (status < 0) - return; + return status; int i; uint32_t addr = 0; @@ -391,21 +420,24 @@ z_ext24_decode (struct mem_read_abstraction_base *mra, int *n_operands, addr |= buffer[i]; } - operand[(*n_operands)++] = create_simple_memory_operand (addr, 0, false); + op = create_simple_memory_operand (addr, 0, false); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; + return 0; } -static uint32_t +static int z_decode_signed_value (struct mem_read_abstraction_base *mra, int offset, - short size) + short size, uint32_t *result) { assert (size >0); assert (size <= 4); bfd_byte buffer[4]; - if (0 > mra->read (mra, offset, size, buffer)) - { - return 0; - } + int status = mra->read (mra, offset, size, buffer); + if (status < 0) + return status; int i; uint32_t value = 0; @@ -415,43 +447,50 @@ z_decode_signed_value (struct mem_read_abstraction_base *mra, int offset, if (buffer[0] & 0x80) { /* Deal with negative values */ - value -= 0x1UL << (size * 8); + value -= 1u << (size * 4) << (size * 4); } - return value; + *result = value; + return 0; } -static uint32_t -decode_signed_value (struct mem_read_abstraction_base *mra, short size) +static int +decode_signed_value (struct mem_read_abstraction_base *mra, short size, + uint32_t *result) { - return z_decode_signed_value (mra, 0, size); + return z_decode_signed_value (mra, 0, size, result); } -static void +static int x_imm1 (struct mem_read_abstraction_base *mra, int offset, int *n_operands, struct operand **operand) { + struct operand *op; bfd_byte byte; int status = mra->read (mra, offset, 1, &byte); if (status < 0) - return; + return status; - operand[(*n_operands)++] = create_immediate_operand (byte); + op = create_immediate_operand (byte); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; + return 0; } /* An eight bit immediate operand. */ -static void +static int imm1_decode (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operand) { - x_imm1 (mra, 0, n_operands, operand); + return x_imm1 (mra, 0, n_operands, operand); } -static void +static int trap_decode (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operand) { - x_imm1 (mra, -1, n_operands, operand); + return x_imm1 (mra, -1, n_operands, operand); } @@ -520,7 +559,9 @@ x_opr_decode_with_size (struct mem_read_abstraction_base *mra, int offset, case OPR_IDX_INDIRECT: { uint8_t x1; - mra->read (mra, offset, 1, &x1); + status = mra->read (mra, offset, 1, &x1); + if (status < 0) + return NULL; int idx = x1; if (postbyte & 0x01) @@ -537,7 +578,9 @@ x_opr_decode_with_size (struct mem_read_abstraction_base *mra, int offset, case OPR_IDX3_DIRECT: { uint8_t x[3]; - mra->read (mra, offset, 3, x); + status = mra->read (mra, offset, 3, x); + if (status < 0) + return NULL; int idx = x[0] << 16 | x[1] << 8 | x[2]; if (x[0] & 0x80) @@ -554,7 +597,9 @@ x_opr_decode_with_size (struct mem_read_abstraction_base *mra, int offset, case OPR_IDX3_DIRECT_REG: { uint8_t x[3]; - mra->read (mra, offset, 3, x); + status = mra->read (mra, offset, 3, x); + if (status < 0) + return NULL; int idx = x[0] << 16 | x[1] << 8 | x[2]; if (x[0] & 0x80) @@ -570,7 +615,9 @@ x_opr_decode_with_size (struct mem_read_abstraction_base *mra, int offset, case OPR_IDX3_INDIRECT: { uint8_t x[3]; - mra->read (mra, offset, 3, x); + status = mra->read (mra, offset, 3, x); + if (status < 0) + return NULL; int idx = x[0] << 16 | x[1] << 8 | x[2]; if (x[0] & 0x80) @@ -587,7 +634,9 @@ x_opr_decode_with_size (struct mem_read_abstraction_base *mra, int offset, case OPR_IDX_DIRECT: { uint8_t x1; - mra->read (mra, offset, 1, &x1); + status = mra->read (mra, offset, 1, &x1); + if (status < 0) + return NULL; int idx = x1; if (postbyte & 0x01) @@ -604,7 +653,9 @@ x_opr_decode_with_size (struct mem_read_abstraction_base *mra, int offset, case OPR_IDX2_REG: { uint8_t x[2]; - mra->read (mra, offset, 2, x); + status = mra->read (mra, offset, 2, x); + if (status < 0) + return NULL; uint32_t idx = x[1] | x[0] << 8 ; idx |= (postbyte & 0x30) << 12; @@ -653,7 +704,7 @@ x_opr_decode_with_size (struct mem_read_abstraction_base *mra, int offset, bfd_byte buffer[4]; status = mra->read (mra, offset, size, buffer); if (status < 0) - operand = NULL; + return NULL; uint32_t ext18 = 0; for (i = 0; i < size; ++i) @@ -672,7 +723,9 @@ x_opr_decode_with_size (struct mem_read_abstraction_base *mra, int offset, case OPR_EXT1: { uint8_t x1 = 0; - mra->read (mra, offset, 1, &x1); + status = mra->read (mra, offset, 1, &x1); + if (status < 0) + return NULL; int16_t addr; addr = x1; addr |= (postbyte & 0x3f) << 8; @@ -687,7 +740,7 @@ x_opr_decode_with_size (struct mem_read_abstraction_base *mra, int offset, bfd_byte buffer[4]; status = mra->read (mra, offset, size, buffer); if (status < 0) - operand = NULL; + return NULL; uint32_t ext24 = 0; for (i = 0; i < size; ++i) @@ -705,7 +758,7 @@ x_opr_decode_with_size (struct mem_read_abstraction_base *mra, int offset, bfd_byte buffer[4]; status = mra->read (mra, offset, size, buffer); if (status < 0) - operand = NULL; + return NULL; uint32_t ext24 = 0; for (i = 0; i < size; ++i) @@ -722,7 +775,8 @@ x_opr_decode_with_size (struct mem_read_abstraction_base *mra, int offset, abort (); } - operand->osize = osize; + if (operand != NULL) + operand->osize = osize; return operand; } @@ -733,124 +787,181 @@ x_opr_decode (struct mem_read_abstraction_base *mra, int offset) return x_opr_decode_with_size (mra, offset, -1); } -static void +static int z_opr_decode (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operand) { - operand[(*n_operands)++] = x_opr_decode (mra, 0); + struct operand *op = x_opr_decode (mra, 0); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; + return 0; } -static void +static int z_opr_decode2 (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operand) { int n = x_opr_n_bytes (mra, 0); - - operand[(*n_operands)++] = x_opr_decode (mra, 0); - operand[(*n_operands)++] = x_opr_decode (mra, n); + if (n < 0) + return n; + struct operand *op = x_opr_decode (mra, 0); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; + op = x_opr_decode (mra, n); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; + return 0; } -static void +static int imm1234 (struct mem_read_abstraction_base *mra, int base, int *n_operands, struct operand **operand) { + struct operand *op; bfd_byte opcode; int status = mra->read (mra, -1, 1, &opcode); if (status < 0) - return; + return status; opcode -= base; int size = registers[opcode & 0xF].bytes; - uint32_t imm = decode_signed_value (mra, size); + uint32_t imm; + if (decode_signed_value (mra, size, &imm) < 0) + return -1; - operand[(*n_operands)++] = create_immediate_operand (imm); + op = create_immediate_operand (imm); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; + return 0; } /* Special case of LD and CMP with register S and IMM operand */ -static void +static int reg_s_imm (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operand) { - operand[(*n_operands)++] = create_register_operand (REG_S); + struct operand *op; + + op = create_register_operand (REG_S); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; - uint32_t imm = decode_signed_value (mra, 3); - operand[(*n_operands)++] = create_immediate_operand (imm); + uint32_t imm; + if (decode_signed_value (mra, 3, &imm) < 0) + return -1; + op = create_immediate_operand (imm); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; + return 0; } /* Special case of LD, CMP and ST with register S and OPR operand */ -static void +static int reg_s_opr (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operand) { - operand[(*n_operands)++] = create_register_operand (REG_S); - operand[(*n_operands)++] = x_opr_decode (mra, 0); + struct operand *op; + + op = create_register_operand (REG_S); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; + op = x_opr_decode (mra, 0); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; + return 0; } -static void +static int z_imm1234_8base (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operand) { - imm1234 (mra, 8, n_operands, operand); + return imm1234 (mra, 8, n_operands, operand); } -static void +static int z_imm1234_0base (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operand) { - imm1234 (mra, 0, n_operands, operand); + return imm1234 (mra, 0, n_operands, operand); } -static void +static int z_tfr (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operand) { + struct operand *op; bfd_byte byte; int status = mra->read (mra, 0, 1, &byte); if (status < 0) - return; + return status; - operand[(*n_operands)++] = create_register_operand (byte >> 4); - operand[(*n_operands)++] = create_register_operand (byte & 0x0F); + op = create_register_operand (byte >> 4); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; + op = create_register_operand (byte & 0x0F); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; + return 0; } -static void +static int z_reg (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operand) { + struct operand *op; bfd_byte byte; int status = mra->read (mra, -1, 1, &byte); if (status < 0) - return; + return status; - operand[(*n_operands)++] = create_register_operand (byte & 0x07); + op = create_register_operand (byte & 0x07); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; + return 0; } -static void +static int reg_xy (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operand) { + struct operand *op; bfd_byte byte; int status = mra->read (mra, -1, 1, &byte); if (status < 0) - return; + return status; - operand[(*n_operands)++] = - create_register_operand ((byte & 0x01) ? REG_Y : REG_X); + op = create_register_operand ((byte & 0x01) ? REG_Y : REG_X); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; + return 0; } -static void +static int lea_reg_xys_opr (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operand) { + struct operand *op; bfd_byte byte; int status = mra->read (mra, -1, 1, &byte); if (status < 0) - return; + return status; int reg_xys = -1; switch (byte & 0x03) @@ -866,18 +977,26 @@ lea_reg_xys_opr (struct mem_read_abstraction_base *mra, break; } - operand[(*n_operands)++] = create_register_operand (reg_xys); - operand[(*n_operands)++] = x_opr_decode (mra, 0); + op = create_register_operand (reg_xys); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; + op = x_opr_decode (mra, 0); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; + return 0; } -static void +static int lea_reg_xys (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operand) { + struct operand *op; bfd_byte byte; int status = mra->read (mra, -1, 1, &byte); if (status < 0) - return; + return status; int reg_n = -1; switch (byte & 0x03) @@ -895,23 +1014,30 @@ lea_reg_xys (struct mem_read_abstraction_base *mra, status = mra->read (mra, 0, 1, &byte); if (status < 0) - return; + return status; - operand[(*n_operands)++] = create_register_operand (reg_n); - operand[(*n_operands)++] = create_memory_operand (false, (int8_t) byte, - 1, reg_n, -1); + op = create_register_operand (reg_n); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; + op = create_memory_operand (false, (int8_t) byte, 1, reg_n, -1); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; + return 0; } /* PC Relative offsets of size 15 or 7 bits */ -static void +static int rel_15_7 (struct mem_read_abstraction_base *mra, int offset, int *n_operands, struct operand **operands) { + struct operand *op; bfd_byte upper; int status = mra->read (mra, offset - 1, 1, &upper); if (status < 0) - return; + return status; bool rel_size = (upper & 0x80); @@ -922,7 +1048,7 @@ rel_15_7 (struct mem_read_abstraction_base *mra, int offset, bfd_byte lower; status = mra->read (mra, offset, 1, &lower); if (status < 0) - return; + return status; addr <<= 8; addr |= lower; @@ -942,17 +1068,20 @@ rel_15_7 (struct mem_read_abstraction_base *mra, int offset, addr = addr - 0x40; } - operands[(*n_operands)++] = - create_simple_memory_operand (addr, mra->posn (mra) - 1, true); + op = create_simple_memory_operand (addr, mra->posn (mra) - 1, true); + if (op == NULL) + return -1; + operands[(*n_operands)++] = op; + return 0; } /* PC Relative offsets of size 15 or 7 bits */ -static void +static int decode_rel_15_7 (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operand) { - rel_15_7 (mra, 1, n_operands, operand); + return rel_15_7 (mra, 1, n_operands, operand); } static int shift_n_bytes (struct mem_read_abstraction_base *); @@ -962,15 +1091,15 @@ static int bm_rel_n_bytes (struct mem_read_abstraction_base *); static int mul_n_bytes (struct mem_read_abstraction_base *); static int bm_n_bytes (struct mem_read_abstraction_base *); -static void psh_pul_decode (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operand); -static void shift_decode (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operand); -static void mul_decode (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operand); -static void bm_decode (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operand); -static void bm_rel_decode (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operand); -static void mov_imm_opr (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operand); -static void loop_primitive_decode (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operands); -static void bit_field_decode (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operands); -static void exg_sex_decode (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operands); +static int psh_pul_decode (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operand); +static int shift_decode (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operand); +static int mul_decode (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operand); +static int bm_decode (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operand); +static int bm_rel_decode (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operand); +static int mov_imm_opr (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operand); +static int loop_primitive_decode (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operands); +static int bit_field_decode (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operands); +static int exg_sex_decode (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operands); static enum optr shift_discrim (struct mem_read_abstraction_base *mra, enum optr hint); @@ -981,33 +1110,66 @@ static enum optr bit_field_discrim (struct mem_read_abstraction_base *mra, enum static enum optr exg_sex_discrim (struct mem_read_abstraction_base *mra, enum optr hint); -static void +static int cmp_xy (struct mem_read_abstraction_base *mra ATTRIBUTE_UNUSED, int *n_operands, struct operand **operand) { - operand[(*n_operands)++] = create_register_operand (REG_X); - operand[(*n_operands)++] = create_register_operand (REG_Y); + struct operand *op; + + op = create_register_operand (REG_X); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; + op = create_register_operand (REG_Y); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; + return 0; } -static void +static int sub_d6_x_y (struct mem_read_abstraction_base *mra ATTRIBUTE_UNUSED, int *n_operands, struct operand **operand) { - operand[(*n_operands)++] = create_register_operand (REG_D6); - operand[(*n_operands)++] = create_register_operand (REG_X); - operand[(*n_operands)++] = create_register_operand (REG_Y); + struct operand *op; + + op = create_register_operand (REG_D6); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; + op = create_register_operand (REG_X); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; + op = create_register_operand (REG_Y); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; + return 0; } -static void +static int sub_d6_y_x (struct mem_read_abstraction_base *mra ATTRIBUTE_UNUSED, int *n_operands, struct operand **operand) { - operand[(*n_operands)++] = create_register_operand (REG_D6); - operand[(*n_operands)++] = create_register_operand (REG_Y); - operand[(*n_operands)++] = create_register_operand (REG_X); + struct operand *op; + + op = create_register_operand (REG_D6); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; + op = create_register_operand (REG_Y); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; + op = create_register_operand (REG_X); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; + return 0; } -static void +static int ld_18bit_decode (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operand); @@ -1628,19 +1790,20 @@ static const struct mb mul_table[] = { }; -static void +static int mul_decode (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operand) { uint8_t mb; + struct operand *op; int status = mra->read (mra, 0, 1, &mb); if (status < 0) - return; + return status; uint8_t byte; status = mra->read (mra, -1, 1, &byte); if (status < 0) - return; + return status; enum MUL_MODE mode = -1; size_t i; @@ -1653,37 +1816,67 @@ mul_decode (struct mem_read_abstraction_base *mra, break; } } - operand[(*n_operands)++] = create_register_operand (byte & 0x07); + op = create_register_operand (byte & 0x07); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; switch (mode) { case MUL_REG_IMM: { int size = (mb & 0x3); - operand[(*n_operands)++] = - create_register_operand_with_size ((mb & 0x38) >> 3, size); - uint32_t imm = z_decode_signed_value (mra, 1, size + 1); - operand[(*n_operands)++] = create_immediate_operand (imm); + op = create_register_operand_with_size ((mb & 0x38) >> 3, size); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; + + uint32_t imm; + if (z_decode_signed_value (mra, 1, size + 1, &imm) < 0) + return -1; + op = create_immediate_operand (imm); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; } break; case MUL_REG_REG: - operand[(*n_operands)++] = create_register_operand ((mb & 0x38) >> 3); - operand[(*n_operands)++] = create_register_operand (mb & 0x07); + op = create_register_operand ((mb & 0x38) >> 3); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; + op = create_register_operand (mb & 0x07); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; break; case MUL_REG_OPR: - operand[(*n_operands)++] = create_register_operand ((mb & 0x38) >> 3); - operand[(*n_operands)++] = x_opr_decode_with_size (mra, 1, mb & 0x3); + op = create_register_operand ((mb & 0x38) >> 3); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; + op = x_opr_decode_with_size (mra, 1, mb & 0x3); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; break; case MUL_OPR_OPR: { int first = x_opr_n_bytes (mra, 1); - operand[(*n_operands)++] = x_opr_decode_with_size (mra, 1, - (mb & 0x30) >> 4); - operand[(*n_operands)++] = x_opr_decode_with_size (mra, first + 1, - (mb & 0x0c) >> 2); + if (first < 0) + return first; + op = x_opr_decode_with_size (mra, 1, (mb & 0x30) >> 4); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; + op = x_opr_decode_with_size (mra, first + 1, (mb & 0x0c) >> 2); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; break; } } + return 0; } @@ -1691,10 +1884,11 @@ static int mul_n_bytes (struct mem_read_abstraction_base *mra) { int nx = 2; + int first, second; uint8_t mb; int status = mra->read (mra, 0, 1, &mb); if (status < 0) - return 0; + return status; enum MUL_MODE mode = -1; size_t i; @@ -1718,15 +1912,20 @@ mul_n_bytes (struct mem_read_abstraction_base *mra) case MUL_REG_REG: break; case MUL_REG_OPR: - nx += x_opr_n_bytes (mra, 1); + first = x_opr_n_bytes (mra, 1); + if (first < 0) + return first; + nx += first; break; case MUL_OPR_OPR: - { - int first = x_opr_n_bytes (mra, nx - 1); - nx += first; - int second = x_opr_n_bytes (mra, nx - 1); - nx += second; - } + first = x_opr_n_bytes (mra, nx - 1); + if (first < 0) + return first; + nx += first; + second = x_opr_n_bytes (mra, nx - 1); + if (second < 0) + return second; + nx += second; break; } @@ -1772,14 +1971,15 @@ static const struct bm bm_table[] = { { 0x87, 0x84, BM_RESERVED1}, }; -static void +static int bm_decode (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operand) { + struct operand *op; uint8_t bm; int status = mra->read (mra, 0, 1, &bm); if (status < 0) - return; + return status; size_t i; enum BM_MODE mode = -1; @@ -1797,28 +1997,44 @@ bm_decode (struct mem_read_abstraction_base *mra, { case BM_REG_IMM: case BM_RESERVED0: - operand[(*n_operands)++] = create_register_operand (bm & 0x07); + op = create_register_operand (bm & 0x07); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; break; case BM_OPR_B: - operand[(*n_operands)++] = x_opr_decode_with_size (mra, 1, 0); + op = x_opr_decode_with_size (mra, 1, 0); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; break; case BM_OPR_W: - operand[(*n_operands)++] = x_opr_decode_with_size (mra, 1, 1); + op = x_opr_decode_with_size (mra, 1, 1); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; break; case BM_OPR_L: - operand[(*n_operands)++] = x_opr_decode_with_size (mra, 1, 3); + op = x_opr_decode_with_size (mra, 1, 3); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; break; case BM_OPR_REG: case BM_RESERVED1: { uint8_t xb; - mra->read (mra, 1, 1, &xb); + status = mra->read (mra, 1, 1, &xb); + if (status < 0) + return status; /* Don't emit a size suffix for register operands */ if ((xb & 0xF8) != 0xB8) - operand[(*n_operands)++] = - x_opr_decode_with_size (mra, 1, (bm & 0x0c) >> 2); + op = x_opr_decode_with_size (mra, 1, (bm & 0x0c) >> 2); else - operand[(*n_operands)++] = x_opr_decode (mra, 1); + op = x_opr_decode (mra, 1); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; } break; } @@ -1829,7 +2045,10 @@ bm_decode (struct mem_read_abstraction_base *mra, case BM_REG_IMM: case BM_RESERVED0: imm = (bm & 0x38) >> 3; - operand[(*n_operands)++] = create_immediate_operand (imm); + op = create_immediate_operand (imm); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; break; case BM_OPR_L: imm |= (bm & 0x03) << 3; @@ -1839,24 +2058,32 @@ bm_decode (struct mem_read_abstraction_base *mra, /* fallthrough */ case BM_OPR_B: imm |= (bm & 0x70) >> 4; - operand[(*n_operands)++] = create_immediate_operand (imm); + op = create_immediate_operand (imm); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; break; case BM_OPR_REG: case BM_RESERVED1: - operand[(*n_operands)++] = create_register_operand ((bm & 0x70) >> 4); + op = create_register_operand ((bm & 0x70) >> 4); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; break; } + return 0; } -static void +static int bm_rel_decode (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operand) { + struct operand *op; uint8_t bm; int status = mra->read (mra, 0, 1, &bm); if (status < 0) - return; + return status; size_t i; enum BM_MODE mode = -1; @@ -1875,39 +2102,64 @@ bm_rel_decode (struct mem_read_abstraction_base *mra, { case BM_REG_IMM: case BM_RESERVED0: - operand[(*n_operands)++] = create_register_operand (bm & 0x07); + op = create_register_operand (bm & 0x07); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; break; case BM_OPR_B: - operand[(*n_operands)++] = x_opr_decode_with_size (mra, 1, 0); - n = 1 + x_opr_n_bytes (mra, 1); + op = x_opr_decode_with_size (mra, 1, 0); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; + n = x_opr_n_bytes (mra, 1); + if (n < 0) + return n; + n += 1; break; case BM_OPR_W: - operand[(*n_operands)++] = x_opr_decode_with_size (mra, 1, 1); - n = 1 + x_opr_n_bytes (mra, 1); + op = x_opr_decode_with_size (mra, 1, 1); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; + n = x_opr_n_bytes (mra, 1); + if (n < 0) + return n; + n += 1; break; case BM_OPR_L: - operand[(*n_operands)++] = x_opr_decode_with_size (mra, 1, 3); - n = 1 + x_opr_n_bytes (mra, 1); + op = x_opr_decode_with_size (mra, 1, 3); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; + n = x_opr_n_bytes (mra, 1); + if (n < 0) + return n; + n += 1; break; case BM_OPR_REG: case BM_RESERVED1: { uint8_t xb; - mra->read (mra, +1, 1, &xb); + status = mra->read (mra, +1, 1, &xb); + if (status < 0) + return status; /* Don't emit a size suffix for register operands */ if ((xb & 0xF8) != 0xB8) { short os = (bm & 0x0c) >> 2; - operand[(*n_operands)++] = x_opr_decode_with_size (mra, 1, os); + op = x_opr_decode_with_size (mra, 1, os); } else - operand[(*n_operands)++] = x_opr_decode (mra, 1); - + op = x_opr_decode (mra, 1); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; } break; } - int imm = 0; + int x, imm = 0; switch (mode) { case BM_OPR_L: @@ -1918,24 +2170,39 @@ bm_rel_decode (struct mem_read_abstraction_base *mra, /* fall through */ case BM_OPR_B: imm |= (bm & 0x70) >> 4; - operand[(*n_operands)++] = create_immediate_operand (imm); + op = create_immediate_operand (imm); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; break; case BM_RESERVED0: imm = (bm & 0x38) >> 3; - operand[(*n_operands)++] = create_immediate_operand (imm); + op = create_immediate_operand (imm); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; break; case BM_REG_IMM: imm = (bm & 0xF8) >> 3; - operand[(*n_operands)++] = create_immediate_operand (imm); + op = create_immediate_operand (imm); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; break; case BM_OPR_REG: case BM_RESERVED1: - operand[(*n_operands)++] = create_register_operand ((bm & 0x70) >> 4); - n += x_opr_n_bytes (mra, 1); + op = create_register_operand ((bm & 0x70) >> 4); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; + x = x_opr_n_bytes (mra, 1); + if (x < 0) + return x; + n += x; break; } - rel_15_7 (mra, n + 1, n_operands, operand); + return rel_15_7 (mra, n + 1, n_operands, operand); } static int @@ -1958,7 +2225,7 @@ bm_n_bytes (struct mem_read_abstraction_base *mra) } } - int n = 2; + int n = 0; switch (mode) { case BM_REG_IMM: @@ -1968,15 +2235,15 @@ bm_n_bytes (struct mem_read_abstraction_base *mra) case BM_OPR_B: case BM_OPR_W: case BM_OPR_L: - n += x_opr_n_bytes (mra, 1); - break; case BM_OPR_REG: case BM_RESERVED1: - n += x_opr_n_bytes (mra, 1); + n = x_opr_n_bytes (mra, 1); + if (n < 0) + return n; break; } - return n; + return n + 2; } static int @@ -2043,6 +2310,7 @@ static int shift_n_bytes (struct mem_read_abstraction_base *mra) { bfd_byte sb; + int opr1, opr2; int status = mra->read (mra, 0, 1, &sb); if (status != 0) return status; @@ -2060,20 +2328,24 @@ shift_n_bytes (struct mem_read_abstraction_base *mra) { case SB_REG_REG_N_EFF: return 2; - break; case SB_REG_OPR_EFF: case SB_ROT: - return 2 + x_opr_n_bytes (mra, 1); - break; + opr1 = x_opr_n_bytes (mra, 1); + if (opr1 < 0) + return opr1; + return 2 + opr1; case SB_REG_OPR_OPR: - { - int opr1 = x_opr_n_bytes (mra, 1); - int opr2 = 0; - if ((sb & 0x30) != 0x20) + opr1 = x_opr_n_bytes (mra, 1); + if (opr1 < 0) + return opr1; + opr2 = 0; + if ((sb & 0x30) != 0x20) + { opr2 = x_opr_n_bytes (mra, opr1 + 1); - return 2 + opr1 + opr2; - } - break; + if (opr2 < 0) + return opr2; + } + return 2 + opr1 + opr2; default: return 3; } @@ -2084,50 +2356,63 @@ shift_n_bytes (struct mem_read_abstraction_base *mra) static int - mov_imm_opr_n_bytes (struct mem_read_abstraction_base *mra) { bfd_byte byte; - int status = mra->read (mra, -1, 1, &byte); + int status = mra->read (mra, -1, 1, &byte); if (status < 0) return status; int size = byte - 0x0c + 1; + int n = x_opr_n_bytes (mra, size); + if (n < 0) + return n; - return size + x_opr_n_bytes (mra, size) + 1; + return size + n + 1; } -static void +static int mov_imm_opr (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operand) { + struct operand *op; bfd_byte byte; int status = mra->read (mra, -1, 1, &byte); if (status < 0) - return ; + return status; int size = byte - 0x0c + 1; - uint32_t imm = decode_signed_value (mra, size); + uint32_t imm; + if (decode_signed_value (mra, size, &imm)) + return -1; - operand[(*n_operands)++] = create_immediate_operand (imm); - operand[(*n_operands)++] = x_opr_decode (mra, size); + op = create_immediate_operand (imm); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; + op = x_opr_decode (mra, size); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; + return 0; } -static void +static int ld_18bit_decode (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operand) { + struct operand *op; size_t size = 3; bfd_byte buffer[3]; int status = mra->read (mra, 0, 2, buffer + 1); if (status < 0) - return ; + return status; status = mra->read (mra, -1, 1, buffer); if (status < 0) - return ; + return status; buffer[0] = (buffer[0] & 0x30) >> 4; @@ -2138,7 +2423,11 @@ ld_18bit_decode (struct mem_read_abstraction_base *mra, imm |= buffer[i] << (8 * (size - i - 1)); } - operand[(*n_operands)++] = create_immediate_operand (imm); + op = create_immediate_operand (imm); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; + return 0; } @@ -2170,7 +2459,9 @@ loop_prim_n_bytes (struct mem_read_abstraction_base *mra) { int mx = 0; uint8_t lb; - mra->read (mra, mx++, 1, &lb); + int status = mra->read (mra, mx++, 1, &lb); + if (status < 0) + return status; enum LP_MODE mode = -1; size_t i; @@ -2186,11 +2477,16 @@ loop_prim_n_bytes (struct mem_read_abstraction_base *mra) if (mode == LP_OPR) { - mx += x_opr_n_bytes (mra, mx) ; + int n = x_opr_n_bytes (mra, mx); + if (n < 0) + return n; + mx += n; } uint8_t rb; - mra->read (mra, mx++, 1, &rb); + status = mra->read (mra, mx++, 1, &rb); + if (status < 0) + return status; if (rb & 0x80) mx++; @@ -2211,7 +2507,11 @@ exg_sex_discrim (struct mem_read_abstraction_base *mra, return operator; struct operand *op0 = create_register_operand ((eb & 0xf0) >> 4); + if (op0 == NULL) + return -1; struct operand *op1 = create_register_operand (eb & 0xf); + if (op1 == NULL) + return -1; int reg0 = ((struct register_operand *) op0)->reg; int reg1 = ((struct register_operand *) op1)->reg; @@ -2231,18 +2531,26 @@ exg_sex_discrim (struct mem_read_abstraction_base *mra, } -static void +static int exg_sex_decode (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operands) { + struct operand *op; uint8_t eb; int status = mra->read (mra, 0, 1, &eb); if (status < 0) - return; + return status; /* Ship out the operands. */ - operands[(*n_operands)++] = create_register_operand ((eb & 0xf0) >> 4); - operands[(*n_operands)++] = create_register_operand (eb & 0xf); + op = create_register_operand ((eb & 0xf0) >> 4); + if (op == NULL) + return -1; + operands[(*n_operands)++] = op; + op = create_register_operand (eb & 0xf); + if (op == NULL) + return -1; + operands[(*n_operands)++] = op; + return 0; } static enum optr @@ -2258,15 +2566,16 @@ loop_primitive_discrim (struct mem_read_abstraction_base *mra, return opbase + ((lb & 0x70) >> 4); } -static void +static int loop_primitive_decode (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operands) { - int offs = 1; + struct operand *op; + int n, offs = 1; uint8_t lb; int status = mra->read (mra, 0, 1, &lb); if (status < 0) - return ; + return status; enum LP_MODE mode = -1; size_t i; @@ -2283,19 +2592,30 @@ loop_primitive_decode (struct mem_read_abstraction_base *mra, switch (mode) { case LP_REG: - operands[(*n_operands)++] = create_register_operand (lb & 0x07); + op = create_register_operand (lb & 0x07); + if (op == NULL) + return -1; + operands[(*n_operands)++] = op; break; case LP_XY: - operands[(*n_operands)++] = - create_register_operand ((lb & 0x01) + REG_X); + op = create_register_operand ((lb & 0x01) + REG_X); + if (op == NULL) + return -1; + operands[(*n_operands)++] = op; break; case LP_OPR: - offs += x_opr_n_bytes (mra, 1); - operands[(*n_operands)++] = x_opr_decode_with_size (mra, 1, lb & 0x03); + n = x_opr_n_bytes (mra, 1); + if (n < 0) + return n; + offs += n; + op = x_opr_decode_with_size (mra, 1, lb & 0x03); + if (op == NULL) + return -1; + operands[(*n_operands)++] = op; break; } - rel_15_7 (mra, offs + 1, n_operands, operands); + return rel_15_7 (mra, offs + 1, n_operands, operands); } @@ -2329,21 +2649,21 @@ shift_discrim (struct mem_read_abstraction_base *mra, } -static void +static int shift_decode (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operands) { + struct operand *op; size_t i; - uint8_t byte; int status = mra->read (mra, -1, 1, &byte); if (status < 0) - return ; + return status; uint8_t sb; status = mra->read (mra, 0, 1, &sb); if (status < 0) - return ; + return status; enum SB_MODE mode = -1; for (i = 0; i < sizeof (sb_table) / sizeof (sb_table[0]); ++i) @@ -2364,7 +2684,9 @@ shift_decode (struct mem_read_abstraction_base *mra, int *n_operands, case SB_OPR_N: { uint8_t xb; - mra->read (mra, 1, 1, &xb); + status = mra->read (mra, 1, 1, &xb); + if (status < 0) + return status; /* The size suffix is not printed if the OPR operand refers directly to a register, because the size is implied by the size of that register. */ @@ -2381,15 +2703,24 @@ shift_decode (struct mem_read_abstraction_base *mra, int *n_operands, { case SB_REG_REG_N_EFF: case SB_REG_REG_N: - operands[(*n_operands)++] = create_register_operand (byte & 0x07); + op = create_register_operand (byte & 0x07); + if (op == NULL) + return -1; + operands[(*n_operands)++] = op; break; case SB_REG_OPR_EFF: case SB_REG_OPR_OPR: - operands[(*n_operands)++] = create_register_operand (byte & 0x07); + op = create_register_operand (byte & 0x07); + if (op == NULL) + return -1; + operands[(*n_operands)++] = op; break; case SB_ROT: - operands[(*n_operands)++] = x_opr_decode_with_size (mra, 1, osize); + op = x_opr_decode_with_size (mra, 1, osize); + if (op == NULL) + return -1; + operands[(*n_operands)++] = op; break; default: @@ -2401,12 +2732,17 @@ shift_decode (struct mem_read_abstraction_base *mra, int *n_operands, { case SB_REG_REG_N_EFF: case SB_REG_REG_N: - operands[(*n_operands)++] = - create_register_operand_with_size (sb & 0x07, osize); + op = create_register_operand_with_size (sb & 0x07, osize); + if (op == NULL) + return -1; + operands[(*n_operands)++] = op; break; case SB_REG_OPR_OPR: - operands[(*n_operands)++] = x_opr_decode_with_size (mra, 1, osize); + op = x_opr_decode_with_size (mra, 1, osize); + if (op == NULL) + return -1; + operands[(*n_operands)++] = op; break; default: @@ -2418,13 +2754,18 @@ shift_decode (struct mem_read_abstraction_base *mra, int *n_operands, { case SB_REG_OPR_EFF: case SB_OPR_N: - operands[(*n_operands)++] = x_opr_decode_with_size (mra, 1, osize); + op = x_opr_decode_with_size (mra, 1, osize); + if (op == NULL) + return -1; + operands[(*n_operands)++] = op; break; case SB_REG_REG_N: { uint8_t xb; - mra->read (mra, 1, 1, &xb); + status = mra->read (mra, 1, 1, &xb); + if (status < 0) + return status; /* This case is slightly unusual. If XB matches the binary pattern 0111XXXX, then instead of @@ -2435,7 +2776,10 @@ shift_decode (struct mem_read_abstraction_base *mra, int *n_operands, if (byte & 0x10) { int shift = ((sb & 0x08) >> 3) | ((xb & 0x0f) << 1); - operands[(*n_operands)++] = create_immediate_operand (shift); + op = create_immediate_operand (shift); + if (op == NULL) + return -1; + operands[(*n_operands)++] = op; } else { @@ -2445,7 +2789,10 @@ shift_decode (struct mem_read_abstraction_base *mra, int *n_operands, } else { - operands[(*n_operands)++] = x_opr_decode (mra, 1); + op = x_opr_decode (mra, 1); + if (op == NULL) + return -1; + operands[(*n_operands)++] = op; } } break; @@ -2453,18 +2800,28 @@ shift_decode (struct mem_read_abstraction_base *mra, int *n_operands, { uint8_t xb; int n = x_opr_n_bytes (mra, 1); - mra->read (mra, 1 + n, 1, &xb); + if (n < 0) + return n; + status = mra->read (mra, 1 + n, 1, &xb); + if (status < 0) + return status; if ((xb & 0xF0) == 0x70) { int imm = xb & 0x0F; imm <<= 1; imm |= (sb & 0x08) >> 3; - operands[(*n_operands)++] = create_immediate_operand (imm); + op = create_immediate_operand (imm); + if (op == NULL) + return -1; + operands[(*n_operands)++] = op; } else { - operands[(*n_operands)++] = x_opr_decode (mra, 1 + n); + op = x_opr_decode (mra, 1 + n); + if (op == NULL) + return -1; + operands[(*n_operands)++] = op; } } break; @@ -2479,13 +2836,17 @@ shift_decode (struct mem_read_abstraction_base *mra, int *n_operands, case SB_OPR_N: { int imm = (sb & 0x08) ? 2 : 1; - operands[(*n_operands)++] = create_immediate_operand (imm); + op = create_immediate_operand (imm); + if (op == NULL) + return -1; + operands[(*n_operands)++] = op; } break; default: break; } + return 0; } static enum optr @@ -2501,41 +2862,59 @@ psh_pul_discrim (struct mem_read_abstraction_base *mra, } -static void +static int psh_pul_decode (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operand) { + struct operand *op; uint8_t byte; int status = mra->read (mra, 0, 1, &byte); if (status != 0) - return; + return status; int bit; if (byte & 0x40) { if ((byte & 0x3F) == 0) - operand[(*n_operands)++] = create_register_all16_operand (); + { + op = create_register_all16_operand (); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; + } else for (bit = 5; bit >= 0; --bit) { if (byte & (0x1 << bit)) { - operand[(*n_operands)++] = create_register_operand (oprregs2[bit]); + op = create_register_operand (oprregs2[bit]); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; } } } else { if ((byte & 0x3F) == 0) - operand[(*n_operands)++] = create_register_all_operand (); + { + op = create_register_all_operand (); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; + } else for (bit = 5; bit >= 0; --bit) { if (byte & (0x1 << bit)) { - operand[(*n_operands)++] = create_register_operand (oprregs1[bit]); + op = create_register_operand (oprregs1[bit]); + if (op == NULL) + return -1; + operand[(*n_operands)++] = op; } } } + return 0; } static enum optr @@ -2548,24 +2927,25 @@ bit_field_discrim (struct mem_read_abstraction_base *mra, if (status != 0) return OP_INVALID; - return (bb & 0x80) ? OP_bfins : OP_bfext; + return (bb & 0x80) ? OP_bfins : OP_bfext; } -static void +static int bit_field_decode (struct mem_read_abstraction_base *mra, int *n_operands, struct operand **operands) { + struct operand *op; int status; bfd_byte byte2; status = mra->read (mra, -1, 1, &byte2); if (status != 0) - return; + return status; bfd_byte bb; status = mra->read (mra, 0, 1, &bb); if (status != 0) - return; + return status; enum BB_MODE mode = -1; size_t i; @@ -2587,15 +2967,22 @@ bit_field_decode (struct mem_read_abstraction_base *mra, case BB_REG_REG_IMM: case BB_REG_OPR_REG: case BB_REG_OPR_IMM: - operands[(*n_operands)++] = create_register_operand (reg1); + op = create_register_operand (reg1); + if (op == NULL) + return -1; + operands[(*n_operands)++] = op; break; case BB_OPR_REG_REG: - operands[(*n_operands)++] = x_opr_decode_with_size (mra, 1, - (bb >> 2) & 0x03); + op = x_opr_decode_with_size (mra, 1, (bb >> 2) & 0x03); + if (op == NULL) + return -1; + operands[(*n_operands)++] = op; break; case BB_OPR_REG_IMM: - operands[(*n_operands)++] = x_opr_decode_with_size (mra, 2, - (bb >> 2) & 0x03); + op = x_opr_decode_with_size (mra, 2, (bb >> 2) & 0x03); + if (op == NULL) + return -1; + operands[(*n_operands)++] = op; break; } @@ -2606,23 +2993,33 @@ bit_field_decode (struct mem_read_abstraction_base *mra, case BB_REG_REG_IMM: { int reg_src = (bb >> 2) & 0x07; - operands[(*n_operands)++] = create_register_operand (reg_src); + op = create_register_operand (reg_src); + if (op == NULL) + return -1; + operands[(*n_operands)++] = op; } break; case BB_OPR_REG_REG: case BB_OPR_REG_IMM: { int reg_src = (byte2 & 0x07); - operands[(*n_operands)++] = create_register_operand (reg_src); + op = create_register_operand (reg_src); + if (op == NULL) + return -1; + operands[(*n_operands)++] = op; } break; case BB_REG_OPR_REG: - operands[(*n_operands)++] = x_opr_decode_with_size (mra, 1, - (bb >> 2) & 0x03); + op = x_opr_decode_with_size (mra, 1, (bb >> 2) & 0x03); + if (op == NULL) + return -1; + operands[(*n_operands)++] = op; break; case BB_REG_OPR_IMM: - operands[(*n_operands)++] = x_opr_decode_with_size (mra, 2, - (bb >> 2) & 0x03); + op = x_opr_decode_with_size (mra, 2, (bb >> 2) & 0x03); + if (op == NULL) + return -1; + operands[(*n_operands)++] = op; break; } @@ -2634,7 +3031,10 @@ bit_field_decode (struct mem_read_abstraction_base *mra, case BB_REG_OPR_REG: { int reg_parm = bb & 0x03; - operands[(*n_operands)++] = create_register_operand (reg_parm); + op = create_register_operand (reg_parm); + if (op == NULL) + return -1; + operands[(*n_operands)++] = op; } break; case BB_REG_REG_IMM: @@ -2642,15 +3042,21 @@ bit_field_decode (struct mem_read_abstraction_base *mra, case BB_REG_OPR_IMM: { bfd_byte i1; - mra->read (mra, 1, 1, &i1); + status = mra->read (mra, 1, 1, &i1); + if (status < 0) + return status; int offset = i1 & 0x1f; int width = bb & 0x03; width <<= 3; width |= i1 >> 5; - operands[(*n_operands)++] = create_bitfield_operand (width, offset); + op = create_bitfield_operand (width, offset); + if (op == NULL) + return -1; + operands[(*n_operands)++] = op; } break; } + return 0; } @@ -2665,13 +3071,19 @@ decode_operation (const struct opcode *opc, { enum optr op = opc->operator; if (opc->discriminator) - op = opc->discriminator (mra, opc->operator); + { + op = opc->discriminator (mra, opc->operator); + if (op == OP_INVALID) + return op; + } if (opc->operands) - opc->operands (mra, n_operands, operands); + if (opc->operands (mra, n_operands, operands) < 0) + return OP_INVALID; if (opc->operands2) - opc->operands2 (mra, n_operands, operands); + if (opc->operands2 (mra, n_operands, operands) < 0) + return OP_INVALID; return op; } @@ -2685,7 +3097,7 @@ decode_s12z (enum optr *myoperator, short *osize, bfd_byte byte; int status = mra->read (mra, 0, 1, &byte); - if (status != 0) + if (status < 0) return status; mra->advance (mra); @@ -2697,7 +3109,9 @@ decode_s12z (enum optr *myoperator, short *osize, n_bytes++; bfd_byte byte2; - mra->read (mra, 0, 1, &byte2); + status = mra->read (mra, 0, 1, &byte2); + if (status < 0) + return status; mra->advance (mra); opc = page2 + byte2; } @@ -2705,7 +3119,15 @@ decode_s12z (enum optr *myoperator, short *osize, *osize = opc->osize; /* Return the number of bytes in the instruction. */ - n_bytes += (opc && opc->insn_bytes) ? opc->insn_bytes (mra) : 0; + if (*myoperator != OP_INVALID && opc->insn_bytes) + { + int n = opc->insn_bytes (mra); + if (n < 0) + return n; + n_bytes += n; + } + else + n_bytes += 1; return n_bytes; } -- Alan Modra Australia Development Lab, IBM