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| author | Christian Krinitsin <mail@krinitsin.com> | 2025-05-30 14:51:13 +0000 |
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| committer | Christian Krinitsin <mail@krinitsin.com> | 2025-05-30 14:51:13 +0000 |
| commit | 225caa38269323af1bfc2daadff5ec8bd930747f (patch) | |
| tree | e0a5fefde9ee100ba6f32fb36de6707490e4164e /mailinglist/output_launchpad/1248168 | |
| parent | 904141bfb8d5385b75eb3b7afec1dcda89af65a7 (diff) | |
| download | emulator-bug-study-225caa38269323af1bfc2daadff5ec8bd930747f.tar.gz emulator-bug-study-225caa38269323af1bfc2daadff5ec8bd930747f.zip | |
add mailinglist scraper results
Diffstat (limited to 'mailinglist/output_launchpad/1248168')
| -rw-r--r-- | mailinglist/output_launchpad/1248168 | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/mailinglist/output_launchpad/1248168 b/mailinglist/output_launchpad/1248168 new file mode 100644 index 00000000..86823bff --- /dev/null +++ b/mailinglist/output_launchpad/1248168 @@ -0,0 +1,29 @@ +MIPS, self-modifying code and uncached memory + +Self-modifying code does not work properly in MIPS in uncached and unmapped kseg1 memory region. + +For example, when running this code I get unexpected behavior: + + 0: e3000010 b 0x390 + 4: 00000000 nop + ... + 380: 00701f40 mfc0 ra,c0_epc + 384: 0400e0bb swr zero,4(ra) + 388: 18000042 eret + 38c: 00000000 nop + 390: 25500000 move t2,zero + 394: 02000b34 li t3,0x2 + 398: 23504b01 subu t2,t2,t3 + 39c: e9003c0b j 0xcf003a4 + 3a0: 0a004a21 addi t2,t2,10 + 3a4: ffff0010 b 0x3a4 + 3a8: 00000000 nop + 3ac: 00000000 nop + + I expect that swr instruction in line 384 would change `addi t2,t2,1`0 to `nop` +This should work because no cache is used for this memory region. + +Can you please provide full reproduction steps rather than just an assembly snippet? + +[Expired for QEMU because there has been no activity for 60 days.] + |