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/**
* On reproduit un code similaire à celui d'un fichier de Busybox (busybox-1.30.0/shell/ash.c).
*
* La commande de compilation est :
*
* arm-linux-gnueabi-gcc -Wp,-MD,shell/.ash.o.d -std=gnu99 -Iinclude -Ilibbb -include include/autoconf.h -D_GNU_SOURCE -DNDEBUG -D"BB_VER=KBUILD_STR(1.30.0)" -Wall -Wshadow -Wwrite-strings -Wundef -Wstrict-prototypes -Wunused -Wunused-parameter -Wunused-function -Wunused-value -Wmissing-prototypes -Wmissing-declarations -Wno-format-security -Wdeclaration-after-statement -Wold-style-definition -fno-builtin-strlen -finline-limit=0 -fomit-frame-pointer -ffunction-sections -fdata-sections -fno-guess-branch-probability -funsigned-char -static-libgcc -falign-functions=1 -falign-jumps=1 -falign-labels=1 -falign-loops=1 -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-builtin-printf -Os -D"KBUILD_STR(s)=#s" -D"KBUILD_BASENAME=KBUILD_STR(ash)" -D"KBUILD_MODNAME=KBUILD_STR(ash)" -c -o shell/ash.o shell/ash.c
*
*/
#if 0
static int
evalcommand(union node *cmd, int flags)
{
static const struct builtincmd null_bltin = {
"\0\0", bltincmd /* why three NULs? */
};
union node *argp;
struct arglist arglist;
char **argv;
int argc;
const struct strlist *sp;
struct cmdentry cmdentry;
const char *path;
char **nargv;
/* First expand the arguments. */
cmdentry.cmdtype = CMDBUILTIN;
cmdentry.u.cmd = &null_bltin;
arglist.lastp = &arglist.list;
*arglist.lastp = NULL;
argc = 0;
if (cmd->ncmd.args) {
smallint pseudovarflag;
for (argp = cmd->ncmd.args; argp; argp = argp->narg.next) {
struct strlist **spp;
spp = arglist.lastp;
if (pseudovarflag)
expandarg(argp, &arglist, EXP_VARTILDE);
for (sp = *spp; sp; sp = sp->next)
argc++;
}
}
/* Reserve one extra spot at the front for shellexec. */
nargv = NULL;//stalloc(sizeof(char *) * (argc + 2));
argv = ++nargv;
*nargv = NULL;
path = vpath.var_text;
/* Now locate the command. */
for (;;) {
find_command(argv[0], &cmdentry, DO_ERR, path);
#if ENABLE_ASH_CMDCMD
if (cmdentry.u.cmd == COMMANDCMD) {
nargv = parse_command_args(argv, &path);
break;
} else
#endif
break;
}
return 0;
}
#endif
static int __attribute__ ((naked)) evalcommand(void /*union node*/ *cmd, int flags)
{
/*
138ac: e92d401f push {r0, r1, r2, r3, r4, lr}
138b0: e3a03002 mov r3, #2
138b4: e58d3008 str r3, [sp, #8]
138b8: e59f30b8 ldr r3, [pc, #184] ; 13978 <evalcommand+0xcc>
138bc: e58dd004 str sp, [sp, #4]
138c0: e58d300c str r3, [sp, #12]
138c4: e3a03000 mov r3, #0
138c8: e58d3000 str r3, [sp]
138cc: e590300c ldr r3, [r0, #12]
138d0: e3530000 cmp r3, #0
138d4: 1a00000d bne 13910 <evalcommand+0x64>
138d8: e3a00000 mov r0, #0
138dc: e59f3098 ldr r3, [pc, #152] ; 1397c <evalcommand+0xd0>
138e0: e5800004 str r0, [r0, #4]
138e4: e5933000 ldr r3, [r3]
138e8: e3a02001 mov r2, #1
138ec: e59330f0 ldr r3, [r3, #240] ; 0xf0
138f0: e28d1008 add r1, sp, #8
138f4: ebfffe71 bl 132c0 <find_command>
138f8: e59d200c ldr r2, [sp, #12]
138fc: e59f307c ldr r3, [pc, #124] ; 13980 <evalcommand+0xd4>
13900: e1520003 cmp r2, r3
13904: 1a000018 bne 1396c <evalcommand+0xc0>
13908: e3a01004 mov r1, #4
1390c: ea00000f b 13950 <evalcommand+0xa4>
13910: e5933004 ldr r3, [r3, #4]
13914: eaffffed b 138d0 <evalcommand+0x24>
13918: e5d23000 ldrb r3, [r2]
1391c: e353002d cmp r3, #45 ; 0x2d
13920: 1a000011 bne 1396c <evalcommand+0xc0>
13924: e5d23001 ldrb r3, [r2, #1]
13928: e2820002 add r0, r2, #2
1392c: e3530000 cmp r3, #0
13930: 0a00000d beq 1396c <evalcommand+0xc0>
13934: e353002d cmp r3, #45 ; 0x2d
13938: 0a000008 beq 13960 <evalcommand+0xb4>
1393c: e3530070 cmp r3, #112 ; 0x70
13940: 1a000009 bne 1396c <evalcommand+0xc0>
13944: e4d03001 ldrb r3, [r0], #1
13948: e3530000 cmp r3, #0
1394c: 1afffffa bne 1393c <evalcommand+0x90>
13950: e5b12004 ldr r2, [r1, #4]!
13954: e3520000 cmp r2, #0
13958: 0a000003 beq 1396c <evalcommand+0xc0>
1395c: eaffffed b 13918 <evalcommand+0x6c>
13960: e5d22002 ldrb r2, [r2, #2]
13964: e3520000 cmp r2, #0
13968: 1afffff3 bne 1393c <evalcommand+0x90>
1396c: e3a00000 mov r0, #0
13970: e28dd014 add sp, sp, #20
13974: e49df004 pop {pc} ; (ldr pc, [sp], #4)
13978: 00017fa4 .word 0x00017fa4
1397c: 000213f4 .word 0x000213f4
13980: 00017e60 .word 0x00017e60
*/
asm (
"push {r0, r1, r2, r3, r4, lr}" "\n"
"mov r3, #2" "\n"
"str r3, [sp, #8]" "\n"
"ldr r3, [pc, #184]" "\n"
"str sp, [sp, #4]" "\n"
"str r3, [sp, #12]" "\n"
"mov r3, #0" "\n"
"str r3, [sp]" "\n"
"ldr r3, [r0, #12]" "\n"
".Lbl_138d0%=:" "\n"
"cmp r3, #0" "\n"
"bne .Lbl_13910%=" "\n"
"mov r0, #0" "\n"
"ldr r3, [pc, #152]" "\n"
"str r0, [r0, #4]" "\n"
"ldr r3, [r3]" "\n"
"mov r2, #1" "\n"
"ldr r3, [r3, #240]" "\n"
"add r1, sp, #8" "\n"
"bl .Lbl_find%=" "\n" /* <find_command> */
"ldr r2, [sp, #12]" "\n"
"ldr r3, [pc, #124]" "\n"
"cmp r2, r3" "\n"
"bne .Lbl_1396c%=" "\n"
"mov r1, #4" "\n"
"b .Lbl_13950%=" "\n"
".Lbl_13910%=:" "\n"
"ldr r3, [r3, #4]" "\n"
"b .Lbl_138d0%=" "\n"
".Lbl_13918%=:" "\n"
"ldrb r3, [r2]" "\n"
"cmp r3, #45" "\n"
"bne .Lbl_1396c%=" "\n"
"ldrb r3, [r2, #1]" "\n"
"add r0, r2, #2" "\n"
"cmp r3, #0" "\n"
"beq .Lbl_1396c%=" "\n"
"cmp r3, #45" "\n"
"beq .Lbl_13960%=" "\n"
".Lbl_1393c%=:" "\n"
"cmp r3, #112" "\n"
"bne .Lbl_1396c%=" "\n"
"ldrb r3, [r0], #1" "\n"
"cmp r3, #0" "\n"
"bne .Lbl_1393c%=" "\n"
".Lbl_13950%=:" "\n"
"ldr r2, [r1, #4]!" "\n"
"cmp r2, #0" "\n"
"beq .Lbl_1396c%=" "\n"
"b .Lbl_13918%=" "\n"
".Lbl_13960%=:" "\n"
"ldrb r2, [r2, #2]" "\n"
"cmp r2, #0" "\n"
"bne .Lbl_1393c%=" "\n"
".Lbl_1396c%=:" "\n"
"mov r0, #0" "\n"
"add sp, sp, #20" "\n"
"pop {pc}" "\n"
".word 0x00017fa4" "\n"
".word 0x000213f4" "\n"
".word 0x00017e60" "\n"
".Lbl_find%=:" "\n"
::"r" (cmd, flags));
}
int main(int argc, char **argv)
{
return evalcommand((void *)0, 0);
}
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