On Fri, May 18, 2012 at 9:46 AM, H. Peter Anvin <hpa@xxxxxxxxx> wrote: > On 05/18/2012 09:35 AM, H.J. Lu wrote: >> >> In that case, both 2.22.52.0.1 and 2.22.52.0.2 are bad. >> > > I suspect that really means we should have a patch which verifies by > construction, and not rely on version numbers. > A small testcase: [hjl@gnu-6 pr14052]$ cat pr14052.s .text .global start /* Used by SH targets. */ start: .global _start _start: .global __start __start: .global main /* Used by HPPA targets. */ main: .dc.a 0 [hjl@gnu-6 pr14052]$ cat pr14052.t SECTIONS { .text : { *(.text) } . = ALIGN (0x1000); .data : { _data_start = .; *(.data) } /DISCARD/ : { *(.*) } } [hjl@gnu-6 pr14052]$ make as -o pr14052.o pr14052.s ./ld -o pr14052 -T pr14052.t pr14052.o readelf -s pr14052 Symbol table '.symtab' contains 7 entries: Num: Value Size Type Bind Vis Ndx Name 0: 0000000000000000 0 NOTYPE LOCAL DEFAULT UND 1: 0000000000000000 0 SECTION LOCAL DEFAULT 1 2: 0000000000000000 0 NOTYPE GLOBAL DEFAULT 1 __start 3: 0000000000000000 0 NOTYPE GLOBAL DEFAULT 1 _start 4: 0000000000001000 0 NOTYPE GLOBAL DEFAULT 1 _data_start 5: 0000000000000000 0 NOTYPE GLOBAL DEFAULT 1 main 6: 0000000000000000 0 NOTYPE GLOBAL DEFAULT 1 start [hjl@gnu-6 pr14052]$ There should be no symbols in ABS section. -- H.J. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/