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authorFaraz Shahbazker <fshahbazker@wavecomp.com>2021-05-05 04:51:17 +0530
committerFaraz Shahbazker <fshahbazker@wavecomp.com>2021-05-22 11:32:35 +0530
commit168671c14cc88e0c47a2b7d56fdede7d6604f14d (patch)
tree2138d04ffeb0e58865490c1382bc28510825b34f /sim
parentb312488f1046a1b837561a4adf4323e29377cf12 (diff)
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sim: mips: Add shadow mappings for 32-bit memory address space
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 26f8bf63bf36f9062a5cc1afacf71462a4abe0c8, 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.
Diffstat (limited to 'sim')
-rw-r--r--sim/mips/ChangeLog6
-rw-r--r--sim/mips/interp.c14
2 files changed, 17 insertions, 3 deletions
diff --git a/sim/mips/ChangeLog b/sim/mips/ChangeLog
index 123d722..0d687a9 100644
--- a/sim/mips/ChangeLog
+++ b/sim/mips/ChangeLog
@@ -1,6 +1,12 @@
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.
diff --git a/sim/mips/interp.c b/sim/mips/interp.c
index 6e00fd0..00c1b63 100644
--- a/sim/mips/interp.c
+++ b/sim/mips/interp.c
@@ -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