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memory breakpoints - proper handling for wrapped addresses.

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This commit is contained in:
Kelvin Sherlock 2019-03-22 00:13:38 -04:00
parent bf09880caf
commit 6f7d6629bb
1 changed files with 16 additions and 2 deletions
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18
src/engine_c.c
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@ -449,8 +449,16 @@ int check_mp_breakpoints(word32 addr, word32 value, unsigned bytes, int in_page,
word32 a1 = addr;
word32 a2 = addr + bytes - 1;
if (in_page) a2 = (a2 & 0x00ff) | (addr & 0xffff00);
if (in_bank) a2 = (a2 & 0xffff) | (addr & 0xff0000);
if (in_page) {
mask = 0x00ff;
} else if (in_bank) {
mask = 0xffff;
} else {
mask = 0xffffff;
}
a2 = (a2 & mask) | (addr & ~mask);
stat1 = GET_PAGE_INFO_WR(((a1) >> 8) & 0xffff);
stat2 = GET_PAGE_INFO_WR(((a2) >> 8) & 0xffff);
@ -460,12 +468,18 @@ int check_mp_breakpoints(word32 addr, word32 value, unsigned bytes, int in_page,
for (i = 0; i < g_num_mp_breakpoints; ++i) {
word32 bp = g_mp_breakpoints[i];
if (bp >= a1 && bp <= a2) {
abort_it:
g_abort_address = addr;
g_abort_bytes = bytes;
mask = (1 << (bytes << 3))-1;
g_abort_value = value & mask;
return 1;
}
if (a2 < a1) {
/* special logic for page/bank-wrapping... */
if (bp >= a1 && bp <= (a1 | mask)) goto abort_it;
if (bp >= (a1 & ~mask) && bp <= a2) goto abort_it;
}
}
}