diff options
Diffstat (limited to 'bfd/elf32-s390.c')
| -rw-r--r-- | bfd/elf32-s390.c | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/bfd/elf32-s390.c b/bfd/elf32-s390.c index f70f9ab..7793d07 100644 --- a/bfd/elf32-s390.c +++ b/bfd/elf32-s390.c @@ -509,7 +509,7 @@ elf_s390_is_local_label_name (abfd, name) The GOT holds the address in the PLT to be executed. The loader then gets: 24(15) = Pointer to the structure describing the object. - 28(15) = Offset in symbol table + 28(15) = Offset into rela.plt The loader must then find the module where the function is and insert the address in the GOT. @@ -527,7 +527,7 @@ RET1: BASR 1,0 # 2 bytes Return from GOT 1st time BRC 15,-x # 4 bytes Jump to start of PLT .word 0 # 2 bytes filler .long ? # 4 bytes offset in GOT - .long ? # 4 bytes offset into symbol table + .long ? # 4 bytes offset into rela.plt This was the general case. There are two additional, optimizes PLT definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768. @@ -537,10 +537,10 @@ PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1 BCR 15,1 # 2 bytes Jump to address .word 0,0,0 # 6 bytes filler RET1: BASR 1,0 # 2 bytes Return from GOT 1st time - L 1,14(1) # 4 bytes Load offset in symbol table in r1 + L 1,14(1) # 4 bytes Load offset in rela.plt in r1 BRC 15,-x # 4 bytes Jump to start of PLT .word 0,0,0 # 6 bytes filler - .long ? # 4 bytes offset into symbol table + .long ? # 4 bytes offset into rela.plt Second the one for GOT offsets < 32768: @@ -549,10 +549,10 @@ PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1 BCR 15,1 # 2 bytes Jump to address .word 0 # 2 bytes filler RET1: BASR 1,0 # 2 bytes Return from GOT 1st time - L 1,14(1) # 4 bytes Load offset in symbol table in r1 + L 1,14(1) # 4 bytes Load offset in rela.plt in r1 BRC 15,-x # 4 bytes Jump to start of PLT .word 0,0,0 # 6 bytes filler - .long ? # 4 bytes offset into symbol table + .long ? # 4 bytes offset into rela.plt Total = 32 bytes per PLT entry @@ -567,7 +567,7 @@ RET1: BASR 1,0 # 2 bytes Return from GOT 1st time BRC 15,-x # 4 bytes Jump to start of PLT .word 0 # 2 bytes filler .long ? # 4 bytes address of GOT entry - .long ? # 4 bytes offset into symbol table */ + .long ? # 4 bytes offset into rela.plt */ static const bfd_byte elf_s390_plt_entry[PLT_ENTRY_SIZE] = { @@ -629,14 +629,14 @@ static const bfd_byte elf_s390_plt_pic16_entry[PLT_ENTRY_SIZE] = 0x00, 0x00 }; -/* The first PLT entry pushes the offset into the symbol table +/* The first PLT entry pushes the offset into the rela.plt from R1 onto the stack at 8(15) and the loader object info at 12(15), loads the loader address in R1 and jumps to it. */ /* The first entry in the PLT for PIC code: PLT0: - ST 1,28(15) # R1 has offset into symbol table + ST 1,28(15) # R1 has offset into rela.plt L 1,4(12) # Get loader ino(object struct address) ST 1,24(15) # Store address L 1,8(12) # Entry address of loader in R1 @@ -645,7 +645,7 @@ PLT0: The first entry in the PLT for static code: PLT0: - ST 1,28(15) # R1 has offset into symbol table + ST 1,28(15) # R1 has offset into rela.plt BASR 1,0 L 1,18(0,1) # Get address of GOT MVC 24(4,15),4(1) # Move loader ino to stack |