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Merge pull request #4035 from Cacodemon345/tss-debug-trap

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Implement TSS debug trap bit
This commit is contained in:
Miran Grča
2024-01-13 23:59:42 +01:00
committed by GitHub
parent b1c292a9e9 a13a8efb39
commit ae9d602972
3 changed files with 23 additions and 3 deletions
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2
src/cpu/386.c
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@@ -311,12 +311,12 @@ exec386_2386(int32_t cycs)
}
} else if (trap) {
flags_rebuild();
dr[6] |= (trap == 2) ? 0x8000 : 0x4000;
trap = 0;
#ifndef USE_NEW_DYNAREC
oldcs = CS;
#endif
cpu_state.oldpc = cpu_state.pc;
dr[6] |= 0x4000;
x86_int(1);
}

11
src/cpu/386_dynarec.c
View File

@@ -268,6 +268,12 @@ exec386_dynarec_int(void)
cpu_block_end = 0;
x86_was_reset = 0;
if (trap == 2) {
/* Handle the T bit in the new TSS first. */
CPU_BLOCK_END();
goto block_ended;
}
while (!cpu_block_end) {
# ifndef USE_NEW_DYNAREC
oldcs = CS;
@@ -321,13 +327,14 @@ exec386_dynarec_int(void)
CPU_BLOCK_END();
}
block_ended:
if (!cpu_state.abrt && trap) {
dr[6] |= (trap == 2) ? 0x8000 : 0x4000;
trap = 0;
# ifndef USE_NEW_DYNAREC
oldcs = CS;
# endif
cpu_state.oldpc = cpu_state.pc;
dr[6] |= 0x4000;
x86_int(1);
}
@@ -542,7 +549,7 @@ exec386_dynarec_dyn(void)
# endif
CPU_BLOCK_END();
if (cpu_state.flags & T_FLAG)
if ((cpu_state.flags & T_FLAG) || (trap == 2))
CPU_BLOCK_END();
if (smi_line)
CPU_BLOCK_END();

13
src/cpu/x86seg.c
View File

@@ -78,6 +78,10 @@ x86seg_log(const char *fmt, ...)
# define x86seg_log(fmt, ...)
#endif
#ifdef USE_DYNAREC
extern int cpu_block_end;
#endif
void
#ifdef OPS_286_386
x86_doabrt_2386(int x86_abrt)
@@ -2088,6 +2092,7 @@ taskswitch286(uint16_t seg, uint16_t *segdat, int is32)
uint32_t new_edi;
uint32_t new_pc;
uint32_t new_flags;
uint32_t t_bit;
uint32_t addr;
uint32_t *segdat232 = (uint32_t *) segdat2;
const x86seg *dt;
@@ -2189,6 +2194,7 @@ taskswitch286(uint16_t seg, uint16_t *segdat, int is32)
new_fs = readmemw(base, 0x58);
new_gs = readmemw(base, 0x5C);
new_ldt = readmemw(base, 0x60);
t_bit = readmemb(base, 0x64) & 1;
cr0 |= 8;
@@ -2279,6 +2285,13 @@ taskswitch286(uint16_t seg, uint16_t *segdat, int is32)
op_loadseg(new_ds, &cpu_state.seg_ds);
op_loadseg(new_fs, &cpu_state.seg_fs);
op_loadseg(new_gs, &cpu_state.seg_gs);
if (t_bit) {
trap = 2;
#ifdef USE_DYNAREC
cpu_block_end = 1;
#endif
}
} else {
if (limit < 43) {
x86ts(NULL, seg);