ref: 633bac1e917fe558b35846ffcc729ec2d47d4c99
parent: 4fc2780a5a3e6f6e79cc2bfd7d53516cecdc54ab
author: Jacob Moody <moody@posixcafe.org>
date: Sun Mar 5 02:47:21 EST 2023
/sys/src/games/^(aout2gba gba/rom): basic gba toolkit
--- /dev/null
+++ b/sys/src/games/aout2gba.c
@@ -1,0 +1,152 @@
+#include <u.h>
+#include <libc.h>
+#include <bio.h>
+#include <mach.h>
+
+static char cart[] = {+ /* entry point */
+ 0x00, 0x00, 0x00, 0x00,
+
+ /* nintendo logo */
+ 0x24,0xFF,0xAE,0x51,0x69,0x9A,0xA2,0x21,
+ 0x3D,0x84,0x82,0x0A,0x84,0xE4,0x09,0xAD,
+ 0x11,0x24,0x8B,0x98,0xC0,0x81,0x7F,0x21,
+ 0xA3,0x52,0xBE,0x19,0x93,0x09,0xCE,0x20,
+ 0x10,0x46,0x4A,0x4A,0xF8,0x27,0x31,0xEC,
+ 0x58,0xC7,0xE8,0x33,0x82,0xE3,0xCE,0xBF,
+ 0x85,0xF4,0xDF,0x94,0xCE,0x4B,0x09,0xC1,
+ 0x94,0x56,0x8A,0xC0,0x13,0x72,0xA7,0xFC,
+ 0x9F,0x84,0x4D,0x73,0xA3,0xCA,0x9A,0x61,
+ 0x58,0x97,0xA3,0x27,0xFC,0x03,0x98,0x76,
+ 0x23,0x1D,0xC7,0x61,0x03,0x04,0xAE,0x56,
+ 0xBF,0x38,0x84,0x00,0x40,0xA7,0x0E,0xFD,
+ 0xFF,0x52,0xFE,0x03,0x6F,0x95,0x30,0xF1,
+ 0x97,0xFB,0xC0,0x85,0x60,0xD6,0x80,0x25,
+ 0xA9,0x63,0xBE,0x03,0x01,0x4E,0x38,0xE2,
+ 0xF9,0xA2,0x34,0xFF,0xBB,0x3E,0x03,0x44,
+ 0x78,0x00,0x90,0xCB,0x88,0x11,0x3A,0x94,
+ 0x65,0xC0,0x7C,0x63,0x87,0xF0,0x3C,0xAF,
+ 0xD6,0x25,0xE4,0x8B,0x38,0x0A,0xAC,0x72,
+ 0x21,0xD4,0xF8,0x07,
+
+ /* title */
+ 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+ 0x20, 0x20, 0x20, 0x20, 0x20,
+
+ /* game code */
+ 'A', 'P', '9', 'E',
+
+ /* maker code */
+ 'P', '9',
+
+ /* fixed */
+ 0x96,0x00,0x00,
+ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+
+ /* version */
+ 0x00,
+
+ /* compliment */
+ 0x00,
+
+ /* reserved */
+ 0x00, 0x00,
+};
+
+static int infd, outfd;
+
+static void
+io(ulong count)
+{+ static char buf[8192];
+ long n, n2;
+
+ do {+ n2 = count > sizeof buf ? sizeof buf : count;
+ n = read(infd, buf, n2);
+ if(n <= 0)
+ sysfatal("read: %r");+ if(write(outfd, buf, n) != n)
+ sysfatal("write: %r");+ count -= n;
+ } while(count != 0);
+}
+
+static void
+usage(void)
+{+ fprint(2, "usage: %s a.out\n", argv0);
+ exits("usage");+}
+
+void
+main(int argc, char **argv)
+{+ Fhdr fhdr;
+ u32int rzero;
+ ulong ep;
+ char *ofile, *iname;
+ char *p, *e;
+ int n;
+ char c;
+
+ ofile = nil;
+ rzero = 0x08000000;
+ ARGBEGIN {+ case 'Z': rzero = strtoull(EARGF(usage()), 0, 0); break;
+ case 'o': ofile = strdup(EARGF(usage())); break;
+ default: usage();
+ } ARGEND;
+
+ if(argc != 1)
+ usage();
+ infd = open(argv[0], OREAD);
+ if(infd < 0)
+ sysfatal("infd: %r");+ if(crackhdr(infd, &fhdr) == 0)
+ sysfatal("crackhdr: %r");+ if(fhdr.type != FARM)
+ sysfatal("not an arm32 a.out");+ iname = strrchr(argv[0], '/');
+ if(iname != nil)
+ iname++;
+ else
+ iname = argv[0];
+ if(ofile == nil)
+ ofile = smprint("%s.gba", iname);+ outfd = create(ofile, OWRITE|OTRUNC, 0666);
+ if(outfd < 0)
+ sysfatal("create: %r");+
+ ep = 0xea000000; //B main
+ ep += (fhdr.entry - rzero - 8)/4;
+ cart[3] = ep>>24;
+ cart[2] = ep>>16;
+ cart[1] = ep>>8;
+ cart[0] = ep;
+
+ p = cart + 0xA0;
+ n = strlen(iname);
+ if(n > 12)
+ sysfatal("title too long");+ memcpy(p, iname, n); //no null
+
+ e = cart + 0xBD;
+ for(c = 0; p < e; p++)
+ c += *p;
+ *p = -(0x19+c);
+
+ if(write(outfd, cart, sizeof cart) != sizeof cart)
+ sysfatal("write: %r");+
+ seek(infd, fhdr.txtoff, 0);
+ io(fhdr.txtsz);
+
+ /* allignment */
+ assert(fhdr.datoff >= fhdr.txtoff + fhdr.txtsz);
+ seek(outfd, fhdr.datoff - (fhdr.txtoff + fhdr.txtsz), 1);
+
+ seek(infd, fhdr.datoff, 0);
+ io(fhdr.datsz);
+ exits(nil);
+}
--- /dev/null
+++ b/sys/src/games/gba/rom/l.s
@@ -1,0 +1,52 @@
+/* MOVW PC, R1 ADD 5, R1 BX R1 */
+#define THUMB WORD $0xE1A0100F; WORD $0xE2811005; WORD $0xE12FFF11
+
+TEXT _main(SB), 1, $-4
+ THUMB
+TEXT _maint(SB), 4, $-4
+ MOVW $setR12(SB), R1 /* load the SB */
+ MOVW R1,R12
+ B ,main(SB)
+
+TEXT _isr(SB), 1, $-4
+ THUMB
+TEXT _isrt(SB), 4, $-4
+ SUB $36,SP
+ WORD $0x4672 /* MOV LR,R2 */
+ MOVW R2,0(SP)
+
+ MOVW R4,4(SP)
+ MOVW R5,8(SP)
+ MOVW R6,12(SP)
+ MOVW R7,16(SP)
+
+ MOVW R8,R2
+ MOVW R2,20(SP)
+ MOVW R9,R2
+ MOVW R2,24(SP)
+ MOVW R10,R2
+ MOVW R2,28(SP)
+ MOVW R11,R2
+ MOVW R2,32(SP)
+
+ BL ,isr(SB)
+
+ MOVW 0(SP),R2
+ WORD $0x4696 /* MOV R2,LR */
+
+ MOVW 4(SP),R4
+ MOVW 8(SP),R5
+ MOVW 12(SP),R6
+ MOVW 16(SP),R7
+
+ MOVW 20(SP),R2
+ MOVW R2,R8
+ MOVW 24(SP),R2
+ MOVW R2,R9
+ MOVW 28(SP),R2
+ MOVW R2,R10
+ MOVW 32(SP),R2
+ MOVW R2,R11
+
+ ADD $36,SP
+ WORD $0x4770 /* BX LR */
--- /dev/null
+++ b/sys/src/games/gba/rom/mkfile
@@ -1,0 +1,7 @@
+</sys/src/mkfile.proto
+
+CC=tc
+LD=tl
+LDFLAGS=-T 0x080000C0 -R 0x4
+O=t
+AS=5a
--- /dev/null
+++ b/sys/src/games/gba/rom/mkone
@@ -1,0 +1,30 @@
+BIN=/sys/games/lib/gba
+
+default:V: $TARG.gba
+
+all:V: $TARG.gba
+
+$TARG.gba: $O.out
+ games/aout2gba -o $target $prereq
+
+$O.out: l.5 $OFILES $LIB
+ $LD $LDFLAGS -o $target $prereq
+
+%.$O: $HFILES
+
+l.5: /sys/src/games/gba/rom/l.s
+ $AS $AFLAGS $prereq
+
+%.$O: %.c
+ $CC $CFLAGS $stem.c
+
+%.$O: %.s
+ $AS $AFLAGS $stem.s
+
+install:V: $BIN/$TARG.gba
+
+$BIN/$TARG.gba: $TARG.gba
+ cp $prereq $target
+
+clean:V:
+ rm -f *.[$OS] [$OS].out y.tab.? lex.yy.c y.debug y.output $TARG.gba $CLEANFILES
--- a/sys/src/games/mkfile
+++ b/sys/src/games/mkfile
@@ -3,6 +3,7 @@
TARG=4s\
5s\
ana\
+ aout2gba\
catclock\
festoon\
geigerstats\