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sim: mips: Add shadow mappings for 32-bit memory address space

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32-bit MIPS programs run on the 64-bit simulator model in 64-bit
sign-extended space. The mapping from 64-bit sign-extended addresses to
32-bit addresses was removed by commit
26f8bf63bf, breaking the 64-bit simulator
model. Add shadow mappings from 64-bit sign extended address space to
32-bit address spaces, in lieu of the AddressTranslation function.

2021-05-04  Faraz Shahbazker  <fshahbazker@wavecomp.com>

sim/mips/ChangeLog:
	* interp.c (sim_open): Add shadow mappings from 32-bit
	address space to 64-bit sign-extended address space.
This commit is contained in:
Faraz Shahbazker 2021-05-05 04:51:17 +05:30
parent b312488f10
commit 168671c14c
2 changed files with 17 additions and 3 deletions
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6
sim/mips/ChangeLog
View File

@ -1,5 +1,11 @@
2021-05-22 Faraz Shahbazker <fshahbazker@wavecomp.com>
sim/mips/ChangeLog:
* interp.c (sim_open): Add shadow mappings from 32-bit
address space to 64-bit sign-extended address space.
2021-05-22 Faraz Shahbazker <fshahbazker@wavecomp.com>
sim/mips/ChangeLog:
* interp.c (sim_create_inferior): Only truncate sign extension
bits for 32-bit target models.

14
sim/mips/interp.c
View File

@ -438,6 +438,9 @@ sim_open (SIM_OPEN_KIND kind, host_callback *cb,
/* memory alias K1BASE@1,K1SIZE%MEMSIZE,K0BASE */
sim_do_commandf (sd, "memory alias 0x%lx@1,0x%lx%%0x%lx,0x%0x",
K1BASE, K1SIZE, (long)mem_size, K0BASE);
if (WITH_TARGET_WORD_BITSIZE == 64)
sim_do_commandf (sd, "memory alias 0x%x,0x%" PRIxTW ",0x%" PRIxTA,
(K0BASE), mem_size, EXTENDED(K0BASE));
}
device_init(sd);
@ -696,11 +699,16 @@ sim_open (SIM_OPEN_KIND kind, host_callback *cb,
if (idt_monitor_base != 0)
{
unsigned loop;
unsigned idt_monitor_size = 1 << 11;
address_word idt_monitor_size = 1 << 11;
/* the default monitor region */
sim_do_commandf (sd, "memory region 0x%x,0x%x",
idt_monitor_base, idt_monitor_size);
if (WITH_TARGET_WORD_BITSIZE == 64)
sim_do_commandf (sd, "memory alias 0x%x,0x%" PRIxTW ",0x%" PRIxTA,
idt_monitor_base, idt_monitor_size,
EXTENDED (idt_monitor_base));
else
sim_do_commandf (sd, "memory region 0x%x,0x%x",
idt_monitor_base, idt_monitor_size);
/* Entry into the IDT monitor is via fixed address vectors, and
not using machine instructions. To avoid clashing with use of