FreeCalypso > hg > freecalypso-reveng
changeset 87:f7fba8518fa2
armdis: skeleton compiles
| author | Michael Spacefalcon <msokolov@ivan.Harhan.ORG> |
|---|---|
| date | Sat, 29 Mar 2014 00:23:16 +0000 |
| parents | 537cf2245d98 |
| children | 691551f0635b |
| files | .hgignore arm7dis/Makefile arm7dis/armdis.c arm7dis/atcommon.c arm7dis/common.c |
| diffstat | 5 files changed, 82 insertions(+), 10 deletions(-) [+] |
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--- a/.hgignore Fri Mar 28 07:01:27 2014 +0000 +++ b/.hgignore Sat Mar 29 00:23:16 2014 +0000 @@ -9,6 +9,8 @@ ^pirimei$ ^rfcap-grep$ +^arm7dis/armdis$ + ^mpffs/mpffs-cat$ ^mpffs/mpffs-dbgls$ ^mpffs/mpffs-ls$
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/arm7dis/Makefile Sat Mar 29 00:23:16 2014 +0000 @@ -0,0 +1,13 @@ +CC= gcc +CFLAGS= -O2 +PROGS= armdis +ARMDIS_OBJS= armdis.o atcommon.o common.o +INSTDIR=/usr/local/bin + +all: ${PROGS} + +armdis: ${ARMDIS_OBJS} + ${CC} -o $@ ${ARMDIS_OBJS} + +clean: + rm -f *.o ${PROGS} *errs
--- a/arm7dis/armdis.c Fri Mar 28 07:01:27 2014 +0000 +++ b/arm7dis/armdis.c Sat Mar 29 00:23:16 2014 +0000 @@ -4,30 +4,79 @@ extern char *binfilename; extern u_char *filemap; -extern u_long disasm_len, base_vma; +extern unsigned disasm_len, base_vma; extern unsigned get_u16(), get_u32(); +extern char *regnames[16], *condition_decode[16]; + +static void +arm_branch(off, word) + unsigned off, word; +{ + unsigned dest; + + dest = (word & 0x00FFFFFF) << 2; + if (dest & 0x02000000) + dest |= 0xFC000000; + dest += base_vma + off + 8; + printf("b%s%s\t0x%x\n", word&0x1000000 ? "l" : "", + condition_decode[word>>28], dest); +} + void arm_disasm_line(off) - u_long off; + unsigned off; { - u_long word; + unsigned word; word = get_u32(filemap + off); printf("%8x:\t%08x\t", base_vma + off, word); if ((word >> 28) == 0xF) { - printf("invalid\n"); + printf("invalid-F\n"); return; } - - + switch ((word >> 24) & 0xF) { + case 0: + case 1: + printf("<data processing, register operand>\n"); + return; + case 2: + case 3: + printf("<data processing, immediate operand>\n"); + return; + case 4: + case 5: + printf("<ldr/str, immediate offset>\n"); + return; + case 6: + case 7: + printf("<ldr/str, register offset>\n"); + return; + case 8: + case 9: + printf("<ldm/stm>\n"); + return; + case 0xA: + case 0xB: + arm_branch(off, word); + return; + case 0xC: + case 0xD: + case 0xE: + printf("<COPROCESSOR>\n"); + return; + case 0xF: + printf("swi%s\t0x%x\n", condition_decode[word>>28], + word & 0xFFFFFF); + return; + } } main(argc, argv) char **argv; { - u_long off; + unsigned off; common_init(argc, argv, 4); for (off = 0; off < disasm_len; off += 4)
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/arm7dis/atcommon.c Sat Mar 29 00:23:16 2014 +0000 @@ -0,0 +1,7 @@ +/* a few disassembly bits common between ARM and Thumb */ + +char *regnames[16] = {"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", + "r8", "r9", "r10", "r11", "r12", "sp", "lr", "pc"}; + +char *condition_decode[16] = {"eq", "ne", "cs", "cc", "mi", "pl", "vs", "vc", + "hi", "ls", "ge", "lt", "gt", "le", "", "INV"};
--- a/arm7dis/common.c Fri Mar 28 07:01:27 2014 +0000 +++ b/arm7dis/common.c Sat Mar 29 00:23:16 2014 +0000 @@ -8,14 +8,14 @@ char *binfilename; u_char *filemap; -u_long disasm_len, base_vma; +unsigned disasm_len, base_vma; common_init(argc, argv, instr_size) char **argv; { int fd; struct stat st; - u_long fileoff; + unsigned fileoff; if (argc < 2 || argc > 5) { fprintf(stderr, @@ -59,7 +59,8 @@ instr_size); exit(1); } - filemap = mmap(NULL, disasm_len, PROT_READ, MAP_PRIVATE, fd, fileoff); + filemap = mmap(NULL, (size_t) disasm_len, PROT_READ, MAP_PRIVATE, fd, + (off_t) fileoff); if (filemap == MAP_FAILED) { perror("mmap"); exit(1);