mirror of
git://sourceware.org/git/glibc.git
synced 2025-01-18 12:16:13 +08:00
Reformat asm statements to remove new gcc warning about multi-line strings.
This commit is contained in:
Andreas Jaeger
parent
f325056f09
commit
1e48d4f660
@ -75,11 +75,11 @@ elf_machine_dynamic (void)
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#if 0
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/* Use this method if GOT address not yet set up. */
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asm ("\
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b,l 1f,%0
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depi 0,31,2,%0
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1: addil L'_GLOBAL_OFFSET_TABLE_ - ($PIC_pcrel$0 - 8),%0
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ldw R'_GLOBAL_OFFSET_TABLE_ - ($PIC_pcrel$0 - 12)(%%r1),%0"
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asm (
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" b,l 1f,%0\n"
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" depi 0,31,2,%0\n"
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"1: addil L'_GLOBAL_OFFSET_TABLE_ - ($PIC_pcrel$0 - 8),%0\n"
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" ldw R'_GLOBAL_OFFSET_TABLE_ - ($PIC_pcrel$0 - 12)(%%r1),%0\n"
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: "=r" (dynamic) : : "r1");
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#else
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/* This works because we already have our GOT address available. */
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@ -95,13 +95,13 @@ elf_machine_load_address (void)
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{
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Elf32_Addr dynamic, dynamic_linkaddress;
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asm ("\
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b,l 1f,%0
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depi 0,31,2,%0
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1: addil L'_DYNAMIC - ($PIC_pcrel$0 - 8),%0
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ldo R'_DYNAMIC - ($PIC_pcrel$0 - 12)(%%r1),%1
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addil L'_GLOBAL_OFFSET_TABLE_ - ($PIC_pcrel$0 - 16),%0
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ldw R'_GLOBAL_OFFSET_TABLE_ - ($PIC_pcrel$0 - 20)(%%r1),%0"
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asm (
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" b,l 1f,%0\n"
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" depi 0,31,2,%0\n"
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"1: addil L'_DYNAMIC - ($PIC_pcrel$0 - 8),%0\n"
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" ldo R'_DYNAMIC - ($PIC_pcrel$0 - 12)(%%r1),%1\n"
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" addil L'_GLOBAL_OFFSET_TABLE_ - ($PIC_pcrel$0 - 16),%0\n"
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" ldw R'_GLOBAL_OFFSET_TABLE_ - ($PIC_pcrel$0 - 20)(%%r1),%0\n"
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: "=r" (dynamic_linkaddress), "=r" (dynamic) : : "r1");
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return dynamic - dynamic_linkaddress;
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@ -250,153 +250,154 @@ elf_machine_runtime_setup (struct link_map *l, int lazy, int profile)
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#define RTLD_START \
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/* Set up dp for any non-PIC lib constructors that may be called. */ \
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static struct link_map * set_dp (struct link_map *map) \
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{ \
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register Elf32_Addr dp asm ("%r27"); \
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dp = D_PTR (map, l_info[DT_PLTGOT]); \
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asm volatile ("" : : "r" (dp)); \
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return map; \
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} \
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\
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asm ("\
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.text
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.globl _start
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.type _start,@function
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_start:
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/* The kernel does not give us an initial stack frame. */
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ldo 64(%sp),%sp
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/* Save the relevant arguments (yes, those are the correct
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registers, the kernel is weird) in their stack slots. */
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stw %r25,-40(%sp) /* argc */
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stw %r24,-44(%sp) /* argv */
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/* We need the LTP, and we need it now. */
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/* $PIC_pcrel$0 points 8 bytes past the current instruction,
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just like a branch reloc. This sequence gets us the runtime
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address of _DYNAMIC. */
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bl 0f,%r19
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depi 0,31,2,%r19 /* clear priviledge bits */
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0: addil L'_DYNAMIC - ($PIC_pcrel$0 - 8),%r19
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ldo R'_DYNAMIC - ($PIC_pcrel$0 - 12)(%r1),%r26
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/* Also get the link time address from the first entry of the GOT. */
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addil L'_GLOBAL_OFFSET_TABLE_ - ($PIC_pcrel$0 - 16),%r19
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ldw R'_GLOBAL_OFFSET_TABLE_ - ($PIC_pcrel$0 - 20)(%r1),%r20
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sub %r26,%r20,%r20 /* Calculate load offset */
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/* Rummage through the dynamic entries, looking for DT_PLTGOT. */
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ldw,ma 8(%r26),%r19
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1: cmpib,=,n 3,%r19,2f /* tag == DT_PLTGOT? */
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cmpib,<>,n 0,%r19,1b
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ldw,ma 8(%r26),%r19
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/* Uh oh! We didn't find one. Abort. */
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iitlbp %r0,(%r0)
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2: ldw -4(%r26),%r19 /* Found it, load value. */
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add %r19,%r20,%r19 /* And add the load offset. */
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/* Our initial stack layout is rather different from everyone
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else's due to the unique PA-RISC ABI. As far as I know it
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looks like this:
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----------------------------------- (this frame created above)
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| 32 bytes of magic |
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|---------------------------------|
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| 32 bytes argument/sp save area |
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|---------------------------------| ((current->mm->env_end) + 63 & ~63)
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| N bytes of slack |
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|---------------------------------|
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| envvar and arg strings |
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|---------------------------------|
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| ELF auxiliary info |
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| (up to 28 words) |
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|---------------------------------|
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| Environment variable pointers |
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| upwards to NULL |
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|---------------------------------|
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| Argument pointers |
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| upwards to NULL |
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|---------------------------------|
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| argc (1 word) |
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-----------------------------------
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So, obviously, we can't just pass %sp to _dl_start. That's
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okay, argv-4 will do just fine.
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The pleasant part of this is that if we need to skip
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arguments we can just decrement argc and move argv, because
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the stack pointer is utterly unrelated to the location of
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the environment and argument vectors. */
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/* This is always within range so we'll be okay. */
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bl _dl_start,%rp
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ldo -4(%r24),%r26
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.globl _dl_start_user
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.type _dl_start_user,@function
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_dl_start_user:
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/* Save the entry point in %r3. */
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copy %ret0,%r3
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/* Remember the lowest stack address. */
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addil LT'__libc_stack_end,%r19
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ldw RT'__libc_stack_end(%r1),%r20
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stw %sp,0(%r20)
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/* See if we were called as a command with the executable file
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name as an extra leading argument. */
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addil LT'_dl_skip_args,%r19
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ldw RT'_dl_skip_args(%r1),%r20
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ldw 0(%r20),%r20
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ldw -40(%sp),%r25 /* argc */
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comib,= 0,%r20,.Lnofix /* FIXME: will be mispredicted */
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ldw -44(%sp),%r24 /* argv (delay slot) */
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sub %r25,%r20,%r25
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stw %r25,-40(%sp)
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sh2add %r20,%r24,%r24
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stw %r24,-44(%sp)
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.Lnofix:
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addil LT'_dl_loaded,%r19
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ldw RT'_dl_loaded(%r1),%r26
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bl set_dp, %r2
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ldw 0(%r26),%r26
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/* Call _dl_init(_dl_loaded, argc, argv, envp). */
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copy %r28,%r26
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/* envp = argv + argc + 1 */
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sh2add %r25,%r24,%r23
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bl _dl_init,%r2
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ldo 4(%r23),%r23 /* delay slot */
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/* Reload argc, argv to the registers start.S expects them in (feh) */
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ldw -40(%sp),%r25
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ldw -44(%sp),%r24
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/* _dl_fini does have a PLT slot now. I don't know how to get
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to it though, so this hack will remain. */
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.section .data
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__dl_fini_plabel:
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.word _dl_fini
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.word 0xdeadbeef
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.previous
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/* %r3 contains a function pointer, we need to mask out the lower
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* bits and load the gp and jump address. */
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depi 0,31,2,%r3
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ldw 0(%r3),%r2
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addil LT'__dl_fini_plabel,%r19
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ldw RT'__dl_fini_plabel(%r1),%r23
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stw %r19,4(%r23)
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ldw 4(%r3),%r19 /* load the object's gp */
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bv %r0(%r2)
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depi 2,31,2,%r23 /* delay slot */
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");
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static struct link_map * \
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set_dp (struct link_map *map) \
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{ \
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register Elf32_Addr dp asm ("%r27"); \
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dp = D_PTR (map, l_info[DT_PLTGOT]); \
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asm volatile ("" : : "r" (dp)); \
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return map; \
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} \
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\
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asm ( \
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" .text\n" \
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" .globl _start\n" \
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" .type _start,@function\n" \
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"_start:\n" \
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/* The kernel does not give us an initial stack frame. */ \
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" ldo 64(%sp),%sp\n" \
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/* Save the relevant arguments (yes, those are the correct \
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registers, the kernel is weird) in their stack slots. */ \
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" stw %r25,-40(%sp)\n" /* argc */ \
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" stw %r24,-44(%sp)\n" /* argv */ \
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\
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/* We need the LTP, and we need it now. */ \
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/* $PIC_pcrel$0 points 8 bytes past the current instruction, \
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just like a branch reloc. This sequence gets us the runtime \
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address of _DYNAMIC. */ \
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" bl 0f,%r19\n" \
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" depi 0,31,2,%r19\n" /* clear priviledge bits */ \
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"0: addil L'_DYNAMIC - ($PIC_pcrel$0 - 8),%r19\n" \
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" ldo R'_DYNAMIC - ($PIC_pcrel$0 - 12)(%r1),%r26\n" \
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\
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/* Also get the link time address from the first entry of the GOT. */ \
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" addil L'_GLOBAL_OFFSET_TABLE_ - ($PIC_pcrel$0 - 16),%r19\n" \
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" ldw R'_GLOBAL_OFFSET_TABLE_ - ($PIC_pcrel$0 - 20)(%r1),%r20\n" \
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\
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" sub %r26,%r20,%r20\n" /* Calculate load offset */ \
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\
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/* Rummage through the dynamic entries, looking for DT_PLTGOT. */ \
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" ldw,ma 8(%r26),%r19\n" \
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"1: cmpib,=,n 3,%r19,2f\n" /* tag == DT_PLTGOT? */ \
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" cmpib,<>,n 0,%r19,1b\n" \
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" ldw,ma 8(%r26),%r19\n" \
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\
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/* Uh oh! We didn't find one. Abort. */ \
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" iitlbp %r0,(%r0)\n" \
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\
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"2: ldw -4(%r26),%r19\n" /* Found it, load value. */ \
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" add %r19,%r20,%r19\n" /* And add the load offset. */ \
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\
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/* Our initial stack layout is rather different from everyone \
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else's due to the unique PA-RISC ABI. As far as I know it \
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looks like this: \
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\
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----------------------------------- (this frame created above) \
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| 32 bytes of magic | \
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|---------------------------------| \
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| 32 bytes argument/sp save area | \
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|---------------------------------| ((current->mm->env_end) + 63 & ~63) \
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| N bytes of slack | \
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|---------------------------------| \
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| envvar and arg strings | \
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|---------------------------------| \
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| ELF auxiliary info | \
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| (up to 28 words) | \
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|---------------------------------| \
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| Environment variable pointers | \
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| upwards to NULL | \
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|---------------------------------| \
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| Argument pointers | \
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| upwards to NULL | \
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|---------------------------------| \
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| argc (1 word) | \
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----------------------------------- \
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\
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So, obviously, we can't just pass %sp to _dl_start. That's \
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okay, argv-4 will do just fine. \
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\
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The pleasant part of this is that if we need to skip \
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arguments we can just decrement argc and move argv, because \
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the stack pointer is utterly unrelated to the location of \
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the environment and argument vectors. */ \
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\
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/* This is always within range so we'll be okay. */ \
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" bl _dl_start,%rp\n" \
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" ldo -4(%r24),%r26\n" \
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\
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" .globl _dl_start_user\n" \
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" .type _dl_start_user,@function\n" \
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"_dl_start_user:\n" \
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/* Save the entry point in %r3. */ \
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" copy %ret0,%r3\n" \
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\
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/* Remember the lowest stack address. */ \
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" addil LT'__libc_stack_end,%r19\n" \
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" ldw RT'__libc_stack_end(%r1),%r20\n" \
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" stw %sp,0(%r20)\n" \
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\
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/* See if we were called as a command with the executable file \
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name as an extra leading argument. */ \
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" addil LT'_dl_skip_args,%r19\n" \
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" ldw RT'_dl_skip_args(%r1),%r20\n" \
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" ldw 0(%r20),%r20\n" \
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\
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" ldw -40(%sp),%r25\n" /* argc */ \
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" comib,= 0,%r20,.Lnofix\n" /* FIXME: will be mispredicted */ \
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" ldw -44(%sp),%r24\n" /* argv (delay slot) */ \
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\
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" sub %r25,%r20,%r25\n" \
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" stw %r25,-40(%sp)\n" \
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" sh2add %r20,%r24,%r24\n" \
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" stw %r24,-44(%sp)\n" \
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\
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".Lnofix:\n" \
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" addil LT'_dl_loaded,%r19\n" \
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" ldw RT'_dl_loaded(%r1),%r26\n" \
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" bl set_dp, %r2\n" \
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" ldw 0(%r26),%r26\n" \
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\
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/* Call _dl_init(_dl_loaded, argc, argv, envp). */ \
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" copy %r28,%r26\n" \
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\
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/* envp = argv + argc + 1 */ \
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" sh2add %r25,%r24,%r23\n" \
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" bl _dl_init,%r2\n" \
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" ldo 4(%r23),%r23\n" /* delay slot */ \
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\
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/* Reload argc, argv to the registers start.S expects them in (feh) */ \
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" ldw -40(%sp),%r25\n" \
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" ldw -44(%sp),%r24\n" \
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\
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/* _dl_fini does have a PLT slot now. I don't know how to get \
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to it though, so this hack will remain. */ \
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" .section .data\n" \
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"__dl_fini_plabel:\n" \
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" .word _dl_fini\n" \
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" .word 0xdeadbeef\n" \
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" .previous\n" \
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\
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/* %r3 contains a function pointer, we need to mask out the lower \
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* bits and load the gp and jump address. */ \
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" depi 0,31,2,%r3\n" \
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" ldw 0(%r3),%r2\n" \
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" addil LT'__dl_fini_plabel,%r19\n" \
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" ldw RT'__dl_fini_plabel(%r1),%r23\n" \
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" stw %r19,4(%r23)\n" \
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" ldw 4(%r3),%r19\n" /* load the object's gp */ \
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" bv %r0(%r2)\n" \
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" depi 2,31,2,%r23\n" /* delay slot */ \
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);
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/* This code gets called via the .plt stub, and is used in
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