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sim: mips: Add handlers to simulator monitor for unlink, lseek and stat

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sim/mips/ChangeLog
	* interp.c (sim_monitor): Add switch entries for unlink (13),
	lseek (14), and stat (15).

Derived from patch authored by Steve Ellcey <sellcey@mips.com>
This commit is contained in:
Faraz Shahbazker 2021-04-04 11:42:43 +05:30
parent 9bcbcdf229
commit 5c6f091ae0
2 changed files with 75 additions and 1 deletions
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6
sim/mips/ChangeLog
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@ -1,3 +1,9 @@
2021-04-04 Steve Ellcey <sellcey@mips.com>
Faraz Shahbazker <fshahbazker@wavecomp.com>
* interp.c (sim_monitor): Add switch entries for unlink (13),
lseek (14), and stat (15).
2021-04-02 Mike Frysinger <vapier@gentoo.org>
* Makefile.in (../igen/igen): Delete rule.

70
sim/mips/interp.c
View File

@ -50,6 +50,7 @@ code on the hardware.
#include "elf-bfd.h"
#include "gdb/callback.h" /* GDB simulator callback interface */
#include "gdb/remote-sim.h" /* GDB simulator interface */
#include "sim-syscall.h" /* Simulator system call support */
char* pr_addr (SIM_ADDR addr);
char* pr_uword64 (uword64 addr);
@ -1147,6 +1148,23 @@ Recognized firmware names are: `idt', `pmon', `lsipmon', and `none'.\n",
return SIM_RC_OK;
}
/* stat structures from MIPS32/64. */
static const char stat32_map[] =
"st_dev,2:st_ino,2:st_mode,4:st_nlink,2:st_uid,2:st_gid,2"
":st_rdev,2:st_size,4:st_atime,4:st_spare1,4:st_mtime,4:st_spare2,4"
":st_ctime,4:st_spare3,4:st_blksize,4:st_blocks,4:st_spare4,8";
static const char stat64_map[] =
"st_dev,2:st_ino,2:st_mode,4:st_nlink,2:st_uid,2:st_gid,2"
":st_rdev,2:st_size,8:st_atime,8:st_spare1,8:st_mtime,8:st_spare2,8"
":st_ctime,8:st_spare3,8:st_blksize,8:st_blocks,8:st_spare4,16";
/* Map for calls using the host struct stat. */
static const CB_TARGET_DEFS_MAP CB_stat_map[] =
{
{ "stat", CB_SYS_stat, 15 },
{ 0, -1, -1 }
};
/* Simple monitor interface (currently setup for the IDT and PMON monitors) */
@ -1167,7 +1185,7 @@ sim_monitor (SIM_DESC sd,
/* The following callback functions are available, however the
monitor we are simulating does not make use of them: get_errno,
isatty, lseek, rename, system, time and unlink */
isatty, rename, system and time. */
switch (reason)
{
@ -1241,6 +1259,56 @@ sim_monitor (SIM_DESC sd,
break;
}
case 13: /* int unlink(const char *path) */
{
char *path = fetch_str (sd, A0);
V0 = sim_io_unlink (sd, path);
free (path);
break;
}
case 14: /* int lseek(int fd, int offset, int whence) */
{
V0 = sim_io_lseek (sd, A0, A1, A2);
break;
}
case 15: /* int stat(const char *path, struct stat *buf); */
{
/* As long as the infrastructure doesn't cache anything
related to the stat mapping, this trick gets us a dual
"struct stat"-type mapping in the least error-prone way. */
host_callback *cb = STATE_CALLBACK (sd);
const char *saved_map = cb->stat_map;
CB_TARGET_DEFS_MAP *saved_syscall_map = cb->syscall_map;
bfd *prog_bfd = STATE_PROG_BFD (sd);
int is_elf32bit = (elf_elfheader(prog_bfd)->e_ident[EI_CLASS] ==
ELFCLASS32);
static CB_SYSCALL s;
CB_SYSCALL_INIT (&s);
s.func = 15;
/* Mask out the sign extension part for 64-bit targets because the
MIPS simulator's memory model is still 32-bit. */
s.arg1 = A0 & 0xFFFFFFFF;
s.arg2 = A1 & 0xFFFFFFFF;
s.p1 = (PTR) sd;
s.p2 = (PTR) cpu;
s.read_mem = sim_syscall_read_mem;
s.write_mem = sim_syscall_write_mem;
cb->syscall_map = (CB_TARGET_DEFS_MAP *) CB_stat_map;
cb->stat_map = is_elf32bit ? stat32_map : stat64_map;
if (cb_syscall (cb, &s) != CB_RC_OK)
sim_engine_halt (sd, cpu, NULL, mips_pc_get (cpu),
sim_stopped, SIM_SIGILL);
V0 = s.result;
cb->stat_map = saved_map;
cb->syscall_map = saved_syscall_map;
break;
}
case 17: /* void _exit() */
{
sim_io_eprintf (sd, "sim_monitor(17): _exit(int reason) to be coded\n");