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Revert "ANDROID: arm: process: Add display of memory around registers when displaying regs."

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This reverts commit 7ad60b42bc.

This change has been deprecated in newer Android kernels, and upstream
changes to the location of kernel text broke its original purpose, so
let's just remove it.

Bug: 124903482
Change-Id: Icdb32f1166caac091fec138a340860a591ebc142
Signed-off-by: Alistair Strachan <astrachan@google.com>
This commit is contained in:
Alistair Strachan 2019-02-20 11:15:36 -08:00
parent 49293dce7b
commit a71fc927e5
1 changed files with 0 additions and 73 deletions
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73
arch/arm/kernel/process.c
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@ -93,77 +93,6 @@ void arch_cpu_idle_exit(void)
idle_notifier_call_chain(IDLE_END);
}
/*
* dump a block of kernel memory from around the given address
*/
static void show_data(unsigned long addr, int nbytes, const char *name)
{
int i, j;
int nlines;
u32 *p;
/*
* don't attempt to dump non-kernel addresses or
* values that are probably just small negative numbers
*/
if (addr < PAGE_OFFSET || addr > -256UL)
return;
printk("\n%s: %#lx:\n", name, addr);
/*
* round address down to a 32 bit boundary
* and always dump a multiple of 32 bytes
*/
p = (u32 *)(addr & ~(sizeof(u32) - 1));
nbytes += (addr & (sizeof(u32) - 1));
nlines = (nbytes + 31) / 32;
for (i = 0; i < nlines; i++) {
/*
* just display low 16 bits of address to keep
* each line of the dump < 80 characters
*/
printk("%04lx ", (unsigned long)p & 0xffff);
for (j = 0; j < 8; j++) {
u32 data;
if (probe_kernel_address(p, data)) {
printk(" ********");
} else {
printk(" %08x", data);
}
++p;
}
printk("\n");
}
}
static void show_extra_register_data(struct pt_regs *regs, int nbytes)
{
mm_segment_t fs;
fs = get_fs();
set_fs(KERNEL_DS);
show_data(regs->ARM_pc - nbytes, nbytes * 2, "PC");
show_data(regs->ARM_lr - nbytes, nbytes * 2, "LR");
show_data(regs->ARM_sp - nbytes, nbytes * 2, "SP");
show_data(regs->ARM_ip - nbytes, nbytes * 2, "IP");
show_data(regs->ARM_fp - nbytes, nbytes * 2, "FP");
show_data(regs->ARM_r0 - nbytes, nbytes * 2, "R0");
show_data(regs->ARM_r1 - nbytes, nbytes * 2, "R1");
show_data(regs->ARM_r2 - nbytes, nbytes * 2, "R2");
show_data(regs->ARM_r3 - nbytes, nbytes * 2, "R3");
show_data(regs->ARM_r4 - nbytes, nbytes * 2, "R4");
show_data(regs->ARM_r5 - nbytes, nbytes * 2, "R5");
show_data(regs->ARM_r6 - nbytes, nbytes * 2, "R6");
show_data(regs->ARM_r7 - nbytes, nbytes * 2, "R7");
show_data(regs->ARM_r8 - nbytes, nbytes * 2, "R8");
show_data(regs->ARM_r9 - nbytes, nbytes * 2, "R9");
show_data(regs->ARM_r10 - nbytes, nbytes * 2, "R10");
set_fs(fs);
}
void __show_regs(struct pt_regs *regs)
{
unsigned long flags;
@ -251,8 +180,6 @@ void __show_regs(struct pt_regs *regs)
printk("Control: %08x%s\n", ctrl, buf);
}
#endif
show_extra_register_data(regs, 128);
}
void show_regs(struct pt_regs * regs)