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Fix overflow detection in ARM relocation

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Fix overflow detection for R_ARM_CALL, R_ARM_PC24, R_ARM_JUMP24 and
R_ARM_PLT32 relocations on ARM. 26 bits means 25 bits for positive and
negative offsets !
This commit is contained in:
Thomas Preud'homme 2013-01-28 19:13:25 +01:00
parent 0f81512d7d
commit bcac413c30
1 changed files with 2 additions and 2 deletions
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4
tccelf.c
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@ -613,14 +613,14 @@ ST_FUNC void relocate_section(TCCState *s1, Section *s)
x += val - addr; x += val - addr;
h = x & 2; h = x & 2;
#ifndef TCC_TARGET_PE #ifndef TCC_TARGET_PE
if ((x & 3) || x >= 0x4000000 || x < -0x4000000) if ((x & 3) || x >= 0x2000000 || x < -0x2000000)
if (!(x & 3) || !blx_avail || !is_call) if (!(x & 3) || !blx_avail || !is_call)
if (s1->output_type == TCC_OUTPUT_MEMORY) { if (s1->output_type == TCC_OUTPUT_MEMORY) {
x += add_jmp_table(s1, val) - val; /* add veneer */ x += add_jmp_table(s1, val) - val; /* add veneer */
is_thumb = 0; /* Veneer uses ARM instructions */ is_thumb = 0; /* Veneer uses ARM instructions */
} }
#endif #endif
if ((x & 3) || x >= 0x4000000 || x < -0x4000000) if ((x & 3) || x >= 0x2000000 || x < -0x2000000)
if (!(x & 3) || !blx_avail || !is_call) if (!(x & 3) || !blx_avail || !is_call)
tcc_error("can't relocate value at %x",addr); tcc_error("can't relocate value at %x",addr);
x >>= 2; x >>= 2;