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[x86] Do not corrupt edx since it can also corrupt REG_PC

This commit is contained in:
David Guillen Fandos 2023-04-15 01:48:29 +02:00
parent 11d87b89df
commit 46d8616a9f
1 changed files with 3 additions and 3 deletions
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6
x86/x86_stub.S
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@ -440,10 +440,10 @@ ext_load_io##rtype: ;\
ret ;\ ret ;\
;\ ;\
ext_load_rom##rtype: ;\ ext_load_rom##rtype: ;\
mov %eax, %edx /* edx = address */ ;\ mov %eax, %esi /* esi = address */ ;\
shr $15, %edx /* edx = address >> 15 */ ;\ shr $15, %esi /* esi = address >> 15 */ ;\
/* Read rdmap pointer */ ;\ /* Read rdmap pointer */ ;\
mov RDMAP_OFF(REG_BASE, FULLREG(dx), ADDR_SIZE_BYTES), FULLREG(cx) ;\ mov RDMAP_OFF(REG_BASE, FULLREG(si), ADDR_SIZE_BYTES), FULLREG(cx) ;\
JUMP_CX_ZERO ext_load_slow##rtype /* page not loaded, slow */ ;\ JUMP_CX_ZERO ext_load_slow##rtype /* page not loaded, slow */ ;\
mov %eax, %edx /* edx = address */ ;\ mov %eax, %edx /* edx = address */ ;\
and $0x7FFF, %edx /* edx = address LSB */ ;\ and $0x7FFF, %edx /* edx = address LSB */ ;\