Using helper callbacks to write assembly instructions
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26777f9856
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a8407ddd19
@ -176,13 +176,14 @@ typedef struct _ArchPluginHelper
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{
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Arch * arch;
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/* variables */
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char const * filename;
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FILE * fp;
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/* callbacks */
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/* accessors */
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char const * (*get_filename)(Arch * arch);
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ArchRegister * (*get_register_by_name_size)(Arch * arch,
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char const * name, uint32_t size);
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/* assembly */
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ssize_t (*write)(Arch * arch, void const * buf, size_t size);
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} ArchPluginHelper;
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typedef struct _ArchPlugin ArchPlugin;
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44
src/arch.c
44
src/arch.c
@ -19,7 +19,7 @@
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <assert.h>
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#include <errno.h>
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#include "Asm/arch.h"
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#include "Asm/asm.h"
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#include "arch.h"
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@ -41,6 +41,10 @@ struct _Arch
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ArchPlugin * plugin;
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size_t instructions_cnt;
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size_t registers_cnt;
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/* internal */
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char const * filename;
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FILE * fp;
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};
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@ -50,6 +54,12 @@ struct _Arch
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((ai->op3 & AOM_TYPE) ? 1 : 0))
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/* prototypes */
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/* callbacks */
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static char const * _arch_get_filename(Arch * arch);
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static ssize_t _arch_write(Arch * arch, void const * buf, size_t size);
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/* public */
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/* functions */
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/* arch_new */
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@ -413,6 +423,8 @@ ArchRegister * arch_get_register_by_name_size(Arch * arch, char const * name,
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/* arch_exit */
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int arch_exit(Arch * arch)
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{
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arch->filename = NULL;
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arch->fp = NULL;
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memset(&arch->helper, 0, sizeof(arch->helper));
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return 0;
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}
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@ -425,10 +437,12 @@ int arch_init(Arch * arch, char const * filename, FILE * fp)
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fprintf(stderr, "DEBUG: %s(\"%s\", %p)\n", __func__, filename,
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(void *)fp);
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#endif
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arch->filename = filename;
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arch->fp = fp;
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arch->helper.arch = arch;
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arch->helper.filename = filename;
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arch->helper.fp = fp;
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arch->helper.get_filename = _arch_get_filename;
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arch->helper.get_register_by_name_size = arch_get_register_by_name_size;
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arch->helper.write = _arch_write;
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arch->plugin->helper = &arch->helper;
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return 0;
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}
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@ -443,3 +457,27 @@ int arch_write(Arch * arch, ArchInstruction * instruction,
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#endif
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return arch->plugin->write(arch->plugin, instruction, call);
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}
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/* private */
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/* callbacks */
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/* arch_get_filename */
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static char const * _arch_get_filename(Arch * arch)
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{
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return arch->filename;
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}
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/* arch_write */
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static ssize_t _arch_write(Arch * arch, void const * buf, size_t size)
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{
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if(fwrite(buf, size, 1, arch->fp) == 1)
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return size;
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if(ferror(arch->fp))
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return -error_set_code(1, "%s: %s", arch->filename,
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strerror(errno));
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if(feof(arch->fp))
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return -error_set_code(1, "%s: %s", arch->filename,
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"End of file reached");
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return -error_set_code(1, "%s: %s", arch->filename, "Write error");
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}
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@ -111,10 +111,11 @@ static int _dalvik_write(ArchPlugin * plugin, ArchInstruction * instruction,
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break;
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default:
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/* FIXME should not happen */
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return -error_set_code(1, "%s: %s", helper->filename,
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return -error_set_code(1, "%s: %s",
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helper->get_filename(helper->arch),
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"Invalid size for opcode");
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}
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if(fwrite(buf, size, 1, helper->fp) != 1)
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return -1; /* XXX report error */
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if(helper->write(helper->arch, buf, size) != size)
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return -1;
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return 0;
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}
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@ -158,36 +158,40 @@ static int _write_immediate(ArchPlugin * plugin,
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static int _write_immediate8(ArchPlugin * plugin, uint8_t value)
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{
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if(fwrite(&value, sizeof(value), 1, plugin->helper->fp) != 1)
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return -error_set_code(1, "%s: %s", plugin->helper->filename,
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strerror(errno));
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ArchPluginHelper * helper = plugin->helper;
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if(helper->write(helper->arch, &value, sizeof(value)) != sizeof(value))
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return -1;
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return 0;
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}
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static int _write_immediate16(ArchPlugin * plugin, uint16_t value)
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{
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ArchPluginHelper * helper = plugin->helper;
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value = _htol16(value);
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if(fwrite(&value, sizeof(value), 1, plugin->helper->fp) != 1)
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return -error_set_code(1, "%s: %s", plugin->helper->filename,
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strerror(errno));
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if(helper->write(helper->arch, &value, sizeof(value)) != sizeof(value))
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return -1;
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return 0;
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}
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static int _write_immediate24(ArchPlugin * plugin, uint32_t value)
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{
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ArchPluginHelper * helper = plugin->helper;
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value = _htol32(value) >> 8;
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if(fwrite(&value, 3, 1, plugin->helper->fp) != 1)
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return -error_set_code(1, "%s: %s", plugin->helper->filename,
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strerror(errno));
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if(helper->write(helper->arch, &value, 3) != 3)
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return -1;
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return 0;
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}
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static int _write_immediate32(ArchPlugin * plugin, uint32_t value)
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{
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ArchPluginHelper * helper = plugin->helper;
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value = _htol32(value);
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if(fwrite(&value, sizeof(value), 1, plugin->helper->fp) != 1)
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return -error_set_code(1, "%s: %s", plugin->helper->filename,
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strerror(errno));
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if(helper->write(helper->arch, &value, sizeof(value)) != sizeof(value))
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return -1;
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return 0;
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}
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@ -275,7 +275,6 @@ static int _java_write(ArchPlugin * plugin, ArchInstruction * instruction,
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ArchPluginHelper * helper = plugin->helper;
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/* FIXME really implement */
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return (fwrite(&instruction->opcode, sizeof(char), 1, helper->fp) == 1)
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? 0 : -error_set_code(1, "%s: %s", helper->filename,
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strerror(errno));
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return (helper->write(helper->arch, &instruction->opcode, 1) == 1)
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? 0 : -1;
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}
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@ -41,6 +41,7 @@ static int _write_sethi(ArchPlugin * plugin, ArchInstruction * instruction,
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static int _sparc_write(ArchPlugin * plugin, ArchInstruction * instruction,
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ArchInstructionCall * call)
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{
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ArchPluginHelper * helper = plugin->helper;
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uint32_t opcode = instruction->opcode;
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if((opcode & 0xc0000000) == 0xc0000000)
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@ -66,7 +67,8 @@ static int _sparc_write(ArchPlugin * plugin, ArchInstruction * instruction,
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else
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return -1;
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opcode = _htob32(opcode);
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if(fwrite(&opcode, sizeof(opcode), 1, plugin->helper->fp) != 1)
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if(helper->write(helper->arch, &opcode, sizeof(opcode))
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!= sizeof(opcode))
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return -1;
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return 0;
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}
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