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authorMichael Meissner <gnu@the-meissners.org>1996-02-22 20:11:41 +0000
committerMichael Meissner <gnu@the-meissners.org>1996-02-22 20:11:41 +0000
commit262faa5417cda51e88583546bb1f1d22eec6ec77 (patch)
tree6351626ae5b12bb407852ff1cb217a76d515eefe /sim/ppc/emul_bugapi.c
parenteaf2030fff1f05462b962e8785ab4104569dc7b7 (diff)
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Add input support; at end of user writes, call fflush
Diffstat (limited to 'sim/ppc/emul_bugapi.c')
-rw-r--r--sim/ppc/emul_bugapi.c71
1 files changed, 64 insertions, 7 deletions
diff --git a/sim/ppc/emul_bugapi.c b/sim/ppc/emul_bugapi.c
index 2b1a308..35357dd 100644
--- a/sim/ppc/emul_bugapi.c
+++ b/sim/ppc/emul_bugapi.c
@@ -22,6 +22,20 @@
#ifndef _EMUL_BUGAPI_C_
#define _EMUL_BUGAPI_C_
+/* Note: this module is called via a table. There is no benefit in
+ making it inline */
+
+#include "emul_generic.h"
+#include "emul_bugapi.h"
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+
/* from PowerPCBug Debugging Package User's Manual, part 2 of 2 and also bug.S - Dale Rahn */
#define _INCHR 0x000 /* Input character */
@@ -137,13 +151,6 @@ static const struct bug_map bug_mapping[] = {
{ _SYMBOLDA, ".SYMBOLDA -- Detach symbol table" },
};
-/* Note: this module is called via a table. There is no benefit in
- making it inline */
-
-#include "emul_generic.h"
-#include "emul_bugapi.h"
-
-
#ifndef OEA_START_ADDRESS
#define OEA_START_ADDRESS 0x100000
#endif
@@ -285,6 +292,40 @@ emul_bugapi_instruction_name(int call_id)
return buffer;
}
+static int
+emul_bugapi_do_read(cpu *processor,
+ unsigned_word cia,
+ unsigned_word buf,
+ int nbytes)
+{
+ unsigned char *scratch_buffer;
+ int status;
+
+ /* get a tempoary bufer */
+ scratch_buffer = (unsigned char *) zalloc(nbytes);
+
+ /* check if buffer exists by reading it */
+ emul_read_buffer((void *)scratch_buffer, buf, nbytes, processor, cia);
+
+ /* read */
+ status = read (0, (void *)scratch_buffer, nbytes);
+
+ if (status == -1) {
+ status = 0;
+ }
+
+ if (status > 0) {
+ emul_write_buffer((void *)scratch_buffer, buf, status, processor, cia);
+
+ /* Bugapi chops off the trailing n, but leaves it in the buffer */
+ if (scratch_buffer[status-1] == '\n' || scratch_buffer[status-1] == '\r')
+ status--;
+ }
+
+ zfree(scratch_buffer);
+ return status;
+}
+
static void
emul_bugapi_do_write(cpu *processor,
unsigned_word cia,
@@ -321,6 +362,8 @@ emul_bugapi_do_write(cpu *processor,
if (suffix)
printf_filtered("%s", suffix);
+
+ flush_stdoutput ();
}
static int
@@ -331,6 +374,7 @@ emul_bugapi_instruction_call(cpu *processor,
{
const int call_id = cpu_registers(processor)->gpr[10];
const char *my_prefix = "bugapi";
+ unsigned char uc;
ITRACE (trace_os_emul,(" 0x%x %s, r3 = 0x%lx, r4 = 0x%lx\n",
call_id, emul_bugapi_instruction_name (call_id),
@@ -345,6 +389,19 @@ emul_bugapi_instruction_call(cpu *processor,
error("emul-bugapi: unimplemented bugapi %s from address 0x%lx\n",
emul_bugapi_instruction_name (call_id), SRR0);
break;
+ /* read a single character, output r3 = byte */
+ /* FIXME: Add support to unbuffer input */
+ case _INCHR:
+ if (read (0, &uc, 1) < 0)
+ uc = 0;
+ cpu_registers(processor)->gpr[3] = uc;
+ break;
+ /* read a line of at most 256 bytes, r3 = ptr to 1st byte, output r3 = ptr to last byte+1 */
+ case _INLN:
+ cpu_registers(processor)->gpr[3] += emul_bugapi_do_read(processor, cia,
+ cpu_registers(processor)->gpr[3],
+ 256);
+ break;
/* output a character, r3 = character */
case _OUTCHR:
printf_filtered("%c", (char)cpu_registers(processor)->gpr[3]);