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Increase simulated memory size. Support new system call ABI. Support exception processing for Linux system calls.

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This commit is contained in:
Anthony Green 2009-07-31 11:40:16 +00:00
parent 5d8d4872fe
commit 7a321525ff
2 changed files with 38 additions and 10 deletions
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11
sim/moxie/ChangeLog
View File

@ -1,3 +1,14 @@
2009-07-31 Anthony Green <green@moxielogic.com>
* interp.c: Increase simulated memory to 16MB.
(sim_resume): Tweak swi system calls to support new ABI (up to 5
args in regs). Also simluate proper exception processing for
Linux system calls.
2009-07-30 Anthony Green <green@moxielogic.com>
* interp.c (sim_resume): Add system call software interrupt support.
2009-06-11 Anthony Green <green@moxielogic.com>
* interp.c (INST2OFFSET): Define.

37
sim/moxie/interp.c
View File

@ -132,8 +132,8 @@ static char *myname;
static SIM_OPEN_KIND sim_kind;
static int issue_messages = 0;
/* Default to a 8 Mbyte (== 2^23) memory space. */
static int sim_memory_size = 23;
/* Default to a 16 Mbyte (== 2^23) memory space. */
static int sim_memory_size = 24;
#define MEM_SIZE_FLOOR 64
void
@ -997,12 +997,8 @@ sim_resume (sd, step, siggnal)
{
char *fname = &memory[cpu.asregs.regs[2]];
int mode = (int) convert_target_flags ((unsigned) cpu.asregs.regs[3]);
/* Permission bits are at 0x12($fp) */
int perm = (int) EXTRACT_WORD(&memory[cpu.asregs.regs[0] + 20]);
int perm = (int) cpu.asregs.regs[4];
int fd = open (fname, mode, perm);
#if 0
fprintf(stderr, "open(\"%s\", 0x%x, 0x%x) = %d\n", fname, mode, perm, fd);
#endif
/* FIXME - set errno */
cpu.asregs.regs[2] = fd;
break;
@ -1011,8 +1007,7 @@ sim_resume (sd, step, siggnal)
{
int fd = cpu.asregs.regs[2];
char *buf = &memory[cpu.asregs.regs[3]];
/* String length is at 0x12($fp) */
unsigned len = EXTRACT_WORD(&memory[cpu.asregs.regs[0] + 20]);
unsigned len = (unsigned) cpu.asregs.regs[4];
cpu.asregs.regs[2] = read (fd, buf, len);
break;
}
@ -1020,11 +1015,33 @@ sim_resume (sd, step, siggnal)
{
char *str = &memory[cpu.asregs.regs[3]];
/* String length is at 0x12($fp) */
unsigned count, len = EXTRACT_WORD(&memory[cpu.asregs.regs[0] + 20]);
unsigned count, len = (unsigned) cpu.asregs.regs[4];
count = write (cpu.asregs.regs[2], str, len);
cpu.asregs.regs[2] = count;
break;
}
case 0xffffffff: /* Linux System Call */
{
unsigned int handler = cpu.asregs.sregs[1];
unsigned int sp = cpu.asregs.regs[1];
cpu.asregs.sregs[2] = 3; /* MOXIE_EX_SWI */
/* Save a slot for the static chain. */
sp -= 4;
/* Push the return address. */
sp -= 4;
wlat (opc, sp, pc + 6);
/* Push the current frame pointer. */
sp -= 4;
wlat (opc, sp, cpu.asregs.regs[0]);
/* Uncache the stack pointer and set the fp & pc. */
cpu.asregs.regs[1] = sp;
cpu.asregs.regs[0] = sp;
pc = handler - 6;
}
default:
break;
}