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binutils-gdb
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* interp.c (sim_create_inferior): Record program arguments for 

later inspection by the trap handler.
(count_argc): New function.
(prog_argv): Declare static.
(sim_write): Declare.
(trap): Implement argc, argnlen and argn system calls. Do not
abort on unknown system calls--simply return -1.
* syscall.h (SYS_argc, SYS_argnlen, SYS_argn): Define.
This commit is contained in:
Alexandre Oliva 2001-01-30 23:03:56 +00:00
parent 7b769fb03b
commit de0492b6fb
3 changed files with 59 additions and 5 deletions
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11
sim/sh/ChangeLog
View File

@ -1,3 +1,14 @@
2001-01-30 Ben Elliston <bje@redhat.com>
* interp.c (sim_create_inferior): Record program arguments for
later inspection by the trap handler.
(count_argc): New function.
(prog_argv): Declare static.
(sim_write): Declare.
(trap): Implement argc, argnlen and argn system calls. Do not
abort on unknown system calls--simply return -1.
* syscall.h (SYS_argc, SYS_argnlen, SYS_argn): Define.
2001-01-24 Alexandre Oliva <aoliva@redhat.com>
* interp.c (trap): Implement time.

48
sim/sh/interp.c
View File

@ -54,6 +54,8 @@
extern unsigned char sh_jump_table[], sh_dsp_table[0x1000], ppi_table[];
int sim_write (SIM_DESC sd, SIM_ADDR addr, unsigned char *buffer, int size);
#define O_RECOMPILE 85
#define DEFINE_TABLE
#define DISASSEMBLER_TABLE
@ -162,6 +164,7 @@ static int target_little_endian;
static int global_endianw, endianb;
static int target_dsp;
static int host_little_endian;
static char **prog_argv;
#if 1
static int maskw = 0;
@ -264,6 +267,20 @@ do { \
#define FPSCR_SZ ((GET_FPSCR() & FPSCR_MASK_SZ) != 0)
#define FPSCR_PR ((GET_FPSCR() & FPSCR_MASK_PR) != 0)
/* Count the number of arguments in an argv. */
static int
count_argc (char **argv)
{
int i;
if (! argv)
return -1;
for (i = 0; argv[i] != NULL; ++i)
continue;
return i;
}
static void
set_fpscr1 (x)
int x;
@ -1102,11 +1119,31 @@ trap (i, regs, memory, maskl, maskw, endianw)
strnswap (regs[5], len);
break;
}
case SYS_argc:
regs[0] = count_argc (prog_argv);
break;
case SYS_argnlen:
if (regs[5] < count_argc (prog_argv))
regs[0] = strlen (prog_argv[regs[5]]);
else
regs[0] = -1;
break;
case SYS_argn:
if (regs[5] < count_argc (prog_argv))
{
/* Include the termination byte. */
int i = strlen (prog_argv[regs[5]]) + 1;
regs[0] = sim_write (0, regs[6], prog_argv[regs[5]], i);
}
else
regs[0] = -1;
break;
case SYS_time:
regs[0] = get_now ();
break;
default:
abort ();
regs[0] = -1;
break;
}
regs[1] = callback->get_errno (callback);
errno = perrno;
@ -2146,12 +2183,17 @@ sim_create_inferior (sd, prog_bfd, argv, env)
char **argv;
char **env;
{
/* clear the registers */
/* Clear the registers. */
memset (&saved_state, 0,
(char*)&saved_state.asregs.end_of_registers - (char*)&saved_state);
/* set the PC */
/* Set the PC. */
if (prog_bfd != NULL)
saved_state.asregs.pc = bfd_get_start_address (prog_bfd);
/* Record the program's arguments. */
prog_argv = argv;
return SIM_RC_OK;
}

5
sim/sh/syscall.h
View File

@ -27,7 +27,8 @@
#define SYS_stat 38
#define SYS_pipe 42
#define SYS_execve 59
#define SYS_argc 172
#define SYS_argnlen 173
#define SYS_argn 174
#define SYS_utime 201 /* not really a system call */
#define SYS_wait 202 /* nor is this */