FreeCalypso > hg > freecalypso-sw
changeset 955:d7830aee0d35
c139-lldbg hack concocted
| author | Mychaela Falconia <falcon@ivan.Harhan.ORG> |
|---|---|
| date | Wed, 04 Nov 2015 20:34:12 +0000 |
| parents | d25d73815817 |
| children | 1557e15a012f |
| files | target-utils/c139-lldbg/Makefile target-utils/c139-lldbg/cmdtab.c target-utils/c139-lldbg/entry.S target-utils/c139-lldbg/entryinfo.c target-utils/c139-lldbg/lldbg.lds target-utils/c139-lldbg/main.c target-utils/c139-lldbg/mygetchar.c |
| diffstat | 7 files changed, 157 insertions(+), 0 deletions(-) [+] |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/target-utils/c139-lldbg/Makefile Wed Nov 04 20:34:12 2015 +0000 @@ -0,0 +1,28 @@ +CC= arm-elf-gcc +CFLAGS= -Os -fno-builtin +CPPFLAGS=-I../include +LD= arm-elf-ld +OBJCOPY=arm-elf-objcopy + +PROG= lldbg +OBJS= entry.o cmdtab.o entryinfo.o main.o mygetchar.o +LIBS= ../libcommon/libcommon.a ../libprintf/libprintf.a +LDS= lldbg.lds + +TC_LIBS=`${CC} -print-file-name=libc.a` \ + `${CC} -print-file-name=libgcc.a` + +all: ${PROG}.bin + +${PROG}.elf: ${OBJS} ${LIBS} ${LDS} + ${LD} -N -T ${LDS} -o $@ ${OBJS} \ + --start-group ${LIBS} --end-group \ + --start-group ${TC_LIBS} --end-group + +${PROG}.bin: ${PROG}.elf + ${OBJCOPY} -O binary $< $@ + +clean: + rm -f *.o *errs *core *.elf *.bin *.srec crt0.S + +FRC:
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/target-utils/c139-lldbg/cmdtab.c Wed Nov 04 20:34:12 2015 +0000 @@ -0,0 +1,20 @@ +#include "cmdtab.h" + +extern void cmd_entryinfo(); +extern void cmd_r8(); +extern void cmd_r16(); +extern void cmd_r32(); +extern void cmd_w8(); +extern void cmd_w16(); +extern void cmd_w32(); + +const struct cmdtab cmdtab[] = { + {"entryinfo", cmd_entryinfo}, + {"r8", cmd_r8}, + {"r16", cmd_r16}, + {"r32", cmd_r32}, + {"w8", cmd_w8}, + {"w16", cmd_w16}, + {"w32", cmd_w32}, + {0, 0} +};
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/target-utils/c139-lldbg/entry.S Wed Nov 04 20:34:12 2015 +0000 @@ -0,0 +1,20 @@ + .text + .globl _entry +_entry: + .code 16 + bx pc + nop + + .code 32 + stmfd sp!, {r0-r12,lr} + mrs r0, CPSR + mov r1, sp + /* supervisor mode, disable all interrupts */ + msr CPSR_c, #0xd3 + ldr sp, =stack_bottom + /* save entry SP and CPSR */ + ldr r2, =lldbg_entry_cpsr + str r0, [r2] + ldr r2, =lldbg_entry_sp + str r1, [r2] + b main
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/target-utils/c139-lldbg/entryinfo.c Wed Nov 04 20:34:12 2015 +0000 @@ -0,0 +1,11 @@ +#include "types.h" + +u32 lldbg_entry_cpsr; +u32 lldbg_entry_sp; + +void +cmd_entryinfo() +{ + printf("CPSR on entry: %08X\n", lldbg_entry_cpsr); + printf("SP on entry after register save: %08X\n", lldbg_entry_sp); +}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/target-utils/c139-lldbg/lldbg.lds Wed Nov 04 20:34:12 2015 +0000 @@ -0,0 +1,42 @@ +OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm") +OUTPUT_ARCH(arm) +ENTRY(_entry) +SECTIONS +{ + /* code */ + . = 0x3B0000; + .text : { + /* regular code */ + *(.text*) + /* gcc voodoo */ + *(.glue_7t) *(.glue_7) *(.vfp11_veneer) *(.v4_bx) + . = ALIGN(4); + } + + /* read-only data */ + . = ALIGN(4); + .rodata : { + *(.rodata*) + } + + /* initialized data */ + . = ALIGN(4); + .data : { + *(.data) + } + PROVIDE(edata = .); + + /* uninitialized data */ + .bss 0x83C000 (NOLOAD) : { + . = ALIGN(4); + __bss_start = .; + *(.bss) + } + . = ALIGN(4); + __bss_end = .; + /* end of image */ + _end = .; + PROVIDE(end = .); +} + +stack_bottom = 0x83FFFC;
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/target-utils/c139-lldbg/main.c Wed Nov 04 20:34:12 2015 +0000 @@ -0,0 +1,15 @@ +#include "types.h" +#include "ns16550.h" + +struct ns16550_regs *uart_base; + +main() +{ + uart_base = (struct ns16550_regs *) 0xFFFF5800; + printf("\2\2\2*Standalone Low Level Debugger entered\2"); + for (;;) { + putchar('>'); + if (command_entry()) + command_dispatch(); + } +}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/target-utils/c139-lldbg/mygetchar.c Wed Nov 04 20:34:12 2015 +0000 @@ -0,0 +1,21 @@ +/* + * The interactive command entry (editing) function in libcommon + * will call mygetchar() for its character input. It is supposed + * to be a blocking wait for input, but in some programs other + * processing can be done while waiting - for example, check for + * keypad presses as well. This is the basic version which waits + * for serial input and nothing else. + */ + +extern int serial_in_poll(); + +int +mygetchar() +{ + register int c; + + do + c = serial_in_poll(); + while (c < 0); + return c; +}