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clear registers at user entry (paranoia)

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This commit is contained in:
John Reiser 2013-01-31 12:20:42 -08:00
parent b362a61863
commit 92ad524947
1 changed files with 14 additions and 1 deletions
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15
src/stub/src/arm-linux.elf-fold.S
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@ -98,12 +98,25 @@ SP_argc= 5*4
ldmia sp!,{r0,r1,r2,r3,r4} @ ADRU,LENU,1+ &Elf32_auxv_t[AT_NULL@.a_type],crumb,MFLG ldmia sp!,{r0,r1,r2,r3,r4} @ ADRU,LENU,1+ &Elf32_auxv_t[AT_NULL@.a_type],crumb,MFLG
add r0,r0,r3 @ ADRU+=crumb add r0,r0,r3 @ ADRU+=crumb
sub r1,r1,r3 @ LENU-=crumb sub r1,r1,r3 @ LENU-=crumb
mov r3,#0 @ clear registers: paranoia
mov r4,#0
mov r5,#0
mov r6,#0
mov r8,#0
mov r9,#0
mov r10,#0
mov r11,#0
#if defined(ARMEL_DARWIN) /*{*/ #if defined(ARMEL_DARWIN) /*{*/
mov r7,#0
mov r12,#0xff & __NR_munmap mov r12,#0xff & __NR_munmap
#elif defined(ARMEL_EABI4) /*}{*/ #elif defined(ARMEL_EABI4) /*}{*/
mov r12,#0
mov r7, #0xff & __NR_munmap mov r7, #0xff & __NR_munmap
#elif defined(ARM_OLDABI) /*{*/ #elif defined(ARM_OLDABI) /*{*/
@ empty mov r7,#0
mov r12,#0
#endif /*}*/ #endif /*}*/
ldr pc,[r2,#4 -2*4] @ Elf32_auxv_t[AT_NULL@.a_type].a_val ldr pc,[r2,#4 -2*4] @ Elf32_auxv_t[AT_NULL@.a_type].a_val