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death_screen

This commit is contained in:
julianb0 2019-08-06 22:47:39 +02:00
parent f5f599c5e6
commit 59fbf66cfe
No known key found for this signature in database
GPG Key ID: 9C7ACF0C053FB8A1
13 changed files with 279 additions and 50 deletions

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@ -631,28 +631,29 @@ def parse_instr(line):
if imm1 == '1':
# [reg+reg]
if imm2 == '0':
instr_args += "%%imm8 {} {} {}".format(fmts["m_rr"]|mlen, reg1, reg2)
instr_args += "%%imm8 {} {} {}".format(fmts["m_rr"]|mlen, '$'+reg1, '$'+reg2)
size += 3
# [reg+reg+imm]
else:
instr_args += "%%imm8 {} {} {} %%signed %%imm16 {}".format(fmts["m_rriw"]|mlen, reg1, reg2, imm2)
instr_args += "%%imm8 {} {} {} %%signed %%imm16 {}"\
.format(fmts["m_rriw"]|mlen, '$'+reg1, '$'+reg2, imm2)
size += 5
# [reg+reg*imm+imm]
else:
instr_args += "%%imm8 {} {} {} %%imm8 {} %%signed %%imm32 {}"\
.format(fmts["m_rrii"]|mlen, reg1, reg2, imm1, imm2)
.format(fmts["m_rrii"]|mlen, '$'+reg1, '$'+reg2, imm1, imm2)
size += 8
# [reg]
elif word in pregs:
instr_args += "%%imm8 {} {}".format(fmts["m_r"]|mlen, word)
elif '$'+word in pregs:
instr_args += "%%imm8 {} {}".format(fmts["m_r"]|mlen, '$'+word)
size += 2
# [imm], converted to [zero+imm]
else:
instr_args += "%%imm8 {} zero zero %%signed %%imm32 {}".format(fmts["m_rrid"]|mlen, word)
instr_args += "%%imm8 {} $zero $zero %%signed %%imm32 {}".format(fmts["m_rrid"]|mlen, word)
size += 7
continue
@ -669,8 +670,8 @@ def parse_instr(line):
# register index $reg
if len(word) == 4 and word[0] == '$':
if word[1:] in pregs:
word = str(pregs[word[1:]])
if '$'+word[1:] in pregs:
word = str(pregs['$'+word[1:]])
# fallthrough
# immediates
@ -700,9 +701,9 @@ def parse_instr(line):
continue
# register
elif word in pregs:
elif '$'+word in pregs:
size += 1
instr_args += word
instr_args += '$'+word
continue
# it's a label (a 32-bit immediate)

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@ -1,34 +1,34 @@
rzx zr zero
cr0 c0
cr1 c1
cr2 c2
rfx fx
rip ip
rbp bp
rsp sp
$rzx $zero
$cr0
$cr1
$cr2
$rfx
$rip
$rbp
$rsp
rax ax r0
rbx bx r1
rcx cx r2
rdx dx r3
rsi si r4
rdi di r5
ax0 a0 r6
ax1 a1 r7
ax2 a2 r8
ax3 a3 r9
ax4 a4 r10
ax5 a5 r11
$rax $r0
$rbx $r1
$rcx $r2
$rdx $r3
$rsi $r4
$rdi $r5
$ax0 $r6
$ax1 $r7
$ax2 $r8
$ax3 $r9
$ax4 $r10
$ax5 $r11
nx0 n0 r12
nx1 n1 r13
nx2 n2 r14
nx3 n3 r15
nx4 n4 r16
nx5 n5 r17
nx6 n6 r18
nx7 n7 r19
nx8 n8 r20
grp gp
trp tp
srp sp
$nx0 $r12
$nx1 $r13
$nx2 $r14
$nx3 $r15
$nx4 $r16
$nx5 $r17
$nx6 $r18
$nx7 $r19
$nx8 $r20
$grp $r21
$trp $r22
$srp $r22

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@ -33,6 +33,7 @@ FNAME_MAX := 0x0000000000000080
;
PRN_CLEAR := 0x000000008BF00001
PRN_FLUSH := 0x000000008BF00002
;
; CRT librairies

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@ -20,6 +20,7 @@ utoa:
;
ltostr:
mov rax, ax0
mov rcx, zero
; make sure base is in [2, 32]
b.b ax2, 2, .bad
@ -60,7 +61,7 @@ ltostr:
; add minus flag, null-terminate and reverse
.fini:
mov.cxnz b[ax0], '-'
add.cxnz ax0, ax0, 1
inc.cxnz ax0, 1
mov b[ax0], zero

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@ -26,6 +26,8 @@ start:
mov rsp, DOSKRNL_STACK
mov rbp, zero
;dump
call main
crash
@ -42,4 +44,5 @@ include "sys/intr/common.k"
include "sys/intr/trap0.k"
include "sys/main.k"
include "sys/dumprf.k"

127
ka/sys/dumprf.k Normal file
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@ -0,0 +1,127 @@
; The OS/K Team licenses this file to you under the MIT license.
; See the LICENSE file in the project root for more information.
dumprf:
push rbp
mov rbp, rsp
push r12
mov r12, ax0
call RFS.LoadReg, r12, $cr2
push rax
call RFS.LoadReg, r12, $cr1
push rax
call RFS.LoadReg, r12, $cr0
push rax
call RFS.LoadReg, r12, $rfx
push rax
call RFS.LoadReg, r12, $rip
push rax
push r12
call printf, .dmp1
call RFS.LoadReg, r12, $srp
push rax
call RFS.LoadReg, r12, $trp
push rax
push 0 # fixme
call RFS.LoadReg, r12, $rbp
push rax
call RFS.LoadReg, r12, $rsp
push rax
call printf, .dmp2
call RFS.LoadReg, r12, $ax5
push rax
call RFS.LoadReg, r12, $ax4
push rax
call RFS.LoadReg, r12, $ax3
push rax
call RFS.LoadReg, r12, $ax2
push rax
call RFS.LoadReg, r12, $ax1
push rax
call RFS.LoadReg, r12, $ax0
push rax
call printf, .dmp3
call RFS.LoadReg, r12, $rdi
push rax
call RFS.LoadReg, r12, $rsi
push rax
call RFS.LoadReg, r12, $rdx
push rax
call RFS.LoadReg, r12, $rcx
push rax
call RFS.LoadReg, r12, $rbx
push rax
call RFS.LoadReg, r12, $rax
push rax
call printf, .dmp4
call RFS.LoadReg, r12, $r17
push rax
call RFS.LoadReg, r12, $r16
push rax
call RFS.LoadReg, r12, $r15
push rax
call RFS.LoadReg, r12, $r14
push rax
call RFS.LoadReg, r12, $r13
push rax
call RFS.LoadReg, r12, $r12
push rax
call printf, .dmp5
call RFS.LoadReg, r12, $r20
push rax
call RFS.LoadReg, r12, $r19
push rax
call RFS.LoadReg, r12, $r18
push rax
call printf, .dmp6
pop r12
leave
ret
.dmp1 = "Environ #1:\nfrm=0d%d rip=0x%x rfx=0x%x\ncr0=0x%x cr1=0x%x cr2=0x%x\n\n"
.dmp2 = "Environ #2:\nrsp=0x%x rbp=0x%x ind=0d%d\ngrp=0x%x trp=0x%x srp=0x%x\n\n"
.dmp3 = "Argument:\nr12=0x%x ax1=0x%x ax2=0x%x\nax3=0x%x ax4=0x%x ax5=0x%x\n\n"
.dmp4 = "Volatile:\nrax=0x%x rbx=0x%x rcx=0x%x\nrdx=0x%x rsi=0x%x rdi=0x%x\n\n"
.dmp5 = "Persistent:\nr12=0x%x r13=0x%x r14=0x%x\nr15=0x%x r16=0x%x r17=0x%x\n"
.dmp6 = "r18=0x%x r19=0x%x r20=0x%x\n"

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@ -4,7 +4,7 @@
TrapHandlers.prolog:
mov rbp, rsp
; nx0 = caller's cr2
; rax = caller's cr2
call RFS.LoadReg, r14, $cr2
; we don't preserve the r12 we got
@ -14,7 +14,6 @@ TrapHandlers.prolog:
jmp rcx
TrapHandlers.epilog:
; TRAP return values: RAX-RDX
mov ax2, rax
@ -27,3 +26,58 @@ TrapHandlers.epilog:
iret
ScreenOfDeath:
push r12
mov r12, ax0
prn 10
prn PRN_CLEAR
prn PRN_FLUSH
call print, .scr1
b.nz r14, zero, .not_con
push .scr2_con
jmp .do_print
.not_con:
b.l r14, 4, .not_krn
push .scr2_krn
jmp .do_print
.not_krn:
push .scr2_usr
.do_print:
push r14
push r12
call printf, .scr2
inc rsp, 24
call dumprf, r14
prn 10
call print, .scr3
.loop:
pause
pause
scan rax
jmp.axz .loop
b.z rax, 0x0A, trap0_handler.handle_Exit
b.z rax, 0x1B, trap0_handler.handle_Shutdown
jmp .loop
crash
.scr1 = "-------- Unhandled EXCEPTION, TRAP/SYSCALL or INTERRUPT\n"
.scr2 = "Offense description: %s\nOffending frame: %d (%s)\n\n"
.scr3 = "Press:\n ENTER to procede to COMMAND.COM\n ESCAPE to shutdown machine\n\n"
.scr2_con = "dedicated command.com frame"
.scr2_usr = "userspace application frame"
.scr2_krn = "exception/interrupt handler"

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@ -23,9 +23,7 @@ trap0_handler:
b.z rax, Sys.FindFirst, .handle_FindFirst
b.z rax, Sys.EnterHaltMode, .handle_HaltMode
mov rax, 1 << 63
mov rcx, 1 << 63
mov rdx, 1 << 63
call ScreenOfDeath, .badsyscall
.fini.savecx:
mov ax2, rcx
@ -34,6 +32,8 @@ trap0_handler:
.fini:
jmp TrapHandlers.epilog
.badsyscall = "Invalid syscall number in RAX"
;------------------------------------------------;
; Syscall implementations ;
;------------------------------------------------;

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@ -130,6 +130,10 @@ main:
call strcmp, argv0, .builtin_cls
jmp.axz .handle_CLS
.builtin_crash = "crash"
call strcmp, argv0, .builtin_crash
jmp.axz .handle_CRASH
.builtin_date = "date"
call strcmp, argv0, .builtin_date
jmp.axz .handle_DATE
@ -195,6 +199,12 @@ main:
prn PRN_CLEAR
jmp .print_prompt
.handle_CRASH:
mov rax, 0xDEADBEEF
trap 0
jmp .print_prompt
.handle_DATE:
call GetTimeUTC

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@ -24,6 +24,11 @@ dump
# Misc. instructions #
#---------------------------------------------------------------------------#
#
# Throws #UDF ("undefined behaviour")
#
udf
#
# Pause the CPU for a very short amount of time (PAUSE)
# Used in spin-type loops

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@ -11,6 +11,7 @@
IMPL_START(into) { INTO(); return 0; }
IMPL_START(pause) { usleep(5000); return 0; }
IMPL_START(udf) { _except(E_UDF, "UDF instruction"); }
//----------------------------------------------------------------------------//
@ -123,7 +124,9 @@ IMPL_START(dswap)
//----------------------------------------------------------------------------//
#define PRN_MAGIC_MASK 0x8BF00000
#define PRN_CLEAR_MAGIC 0x8BF00001
#define PRN_FLUSH_MAGIC 0x8BF00002
IMPL_START(prn)
{
@ -132,8 +135,22 @@ IMPL_START(prn)
ulong v = p1->val;
// Magic value? :)
if (__builtin_expect(v == PRN_CLEAR_MAGIC, 0))
console_clear();
if (__builtin_expect((v & PRN_MAGIC_MASK) > 0, 0))
{
switch (v)
{
case PRN_CLEAR_MAGIC:
console_clear();
break;
case PRN_FLUSH_MAGIC:
console_flushkeybuf();
break;
default:
_except(E_ILL, "Bad PRN magic");
}
}
else if (v > 0)
console_putc((char)v);

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@ -37,6 +37,12 @@ keycode_t console_scankeybuf(void)
return 0;
}
void console_flushkeybuf(void)
{
memset(keybuf, 0, KEYBUFSIZE);
keybuf_last = keybuf_ptr = &keybuf[0];
}
#define QKEY(key, c, cshift, cmode, calt, cgui) \
_QKEY(SDLK_##key, c, cshift, cmode, calt, cgui)
@ -70,6 +76,8 @@ void console_handle_input(SDL_Keycode key)
case SDLK_SPACE: code = ' '; break;
case SDLK_BACKSPACE: code = '\b'; break;
case SDLK_ESCAPE: code = 0x1B; break;
case SDLK_RETURN:
case SDLK_RETURN2:
code = '\n';

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@ -12,6 +12,8 @@ extern keycode_t *keybuf_ptr;
keycode_t console_getkey(void);
keycode_t console_scankeybuf(void);
void console_flushkeybuf(void);
void console_addkey(keycode_t);
void console_handle_input(SDL_Keycode key);